annotate lib/fts.c @ 17074:d4ccb0388f18

fts: reduce two or more trailing slashes to just one, usually * lib/fts.c (fts_open): Upon initialization, if a name ends in two or more slashes, trim all but the final one. But if a name consists solely of two slashes, don't modify it. If it consists solely of three or more slashes, strip all but one. This is part of the solution to a minor problem with rm: it would print a bogus ELOOP diagnostic when failing to remove the slash-decorated name of a symlink-to-directory: $ mkdir d && ln -s d s && env rm -r s/ rm: cannot remove 's': Too many levels of symbolic links With the change below and a trivial don't-trim-trailing-slashes adjustment to remove.c, it does this: $ env rm -r s/ rm: cannot remove 's/': Not a directory Improved by: Eric Blake
author Jim Meyering <meyering@redhat.com>
date Tue, 04 Sep 2012 11:36:38 +0200
parents 60627a1a95ff
children 72f4bab621be
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 /* Traverse a file hierarchy.
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2
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3 Copyright (C) 2004-2012 Free Software Foundation, Inc.
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4
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5 This program is free software: you can redistribute it and/or modify
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6 it under the terms of the GNU General Public License as published by
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7 the Free Software Foundation; either version 3 of the License, or
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8 (at your option) any later version.
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9
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10 This program is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 GNU General Public License for more details.
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14
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15 You should have received a copy of the GNU General Public License
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16 along with this program. If not, see <http://www.gnu.org/licenses/>. */
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17
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18 /*-
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19 * Copyright (c) 1990, 1993, 1994
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20 * The Regents of the University of California. All rights reserved.
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21 *
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22 * Redistribution and use in source and binary forms, with or without
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23 * modification, are permitted provided that the following conditions
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24 * are met:
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25 * 1. Redistributions of source code must retain the above copyright
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26 * notice, this list of conditions and the following disclaimer.
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27 * 2. Redistributions in binary form must reproduce the above copyright
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28 * notice, this list of conditions and the following disclaimer in the
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29 * documentation and/or other materials provided with the distribution.
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30 * 4. Neither the name of the University nor the names of its contributors
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31 * may be used to endorse or promote products derived from this software
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32 * without specific prior written permission.
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33 *
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34 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS "AS IS" AND
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35 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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36 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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37 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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38 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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39 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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40 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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41 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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42 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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43 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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44 * SUCH DAMAGE.
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45 */
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46
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47 #include <config.h>
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48
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49 #if defined(LIBC_SCCS) && !defined(lint)
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50 static char sccsid[] = "@(#)fts.c 8.6 (Berkeley) 8/14/94";
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51 #endif /* LIBC_SCCS and not lint */
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52
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53 #include "fts_.h"
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54
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55 #if HAVE_SYS_PARAM_H || defined _LIBC
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56 # include <sys/param.h>
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57 #endif
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58 #ifdef _LIBC
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59 # include <include/sys/stat.h>
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60 #else
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61 # include <sys/stat.h>
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62 #endif
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63 #include <fcntl.h>
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64 #include <errno.h>
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65 #include <stdbool.h>
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66 #include <stdlib.h>
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67 #include <string.h>
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68 #include <unistd.h>
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69
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70 #if ! _LIBC
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71 # include "fcntl--.h"
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72 # include "dirent--.h"
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73 # include "unistd--.h"
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74 /* FIXME - use fcntl(F_DUPFD_CLOEXEC)/openat(O_CLOEXEC) once they are
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75 supported. */
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76 # include "cloexec.h"
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77 # include "openat.h"
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78 # include "same-inode.h"
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79 #endif
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80
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81 #include <dirent.h>
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82 #ifndef _D_EXACT_NAMLEN
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83 # define _D_EXACT_NAMLEN(dirent) strlen ((dirent)->d_name)
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84 #endif
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85
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86 #if HAVE_STRUCT_DIRENT_D_TYPE
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87 /* True if the type of the directory entry D is known. */
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88 # define DT_IS_KNOWN(d) ((d)->d_type != DT_UNKNOWN)
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89 /* True if the type of the directory entry D must be T. */
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90 # define DT_MUST_BE(d, t) ((d)->d_type == (t))
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91 # define D_TYPE(d) ((d)->d_type)
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92 #else
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93 # define DT_IS_KNOWN(d) false
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94 # define DT_MUST_BE(d, t) false
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95 # define D_TYPE(d) DT_UNKNOWN
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96
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97 # undef DT_UNKNOWN
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98 # define DT_UNKNOWN 0
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99
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100 /* Any nonzero values will do here, so long as they're distinct.
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101 Undef any existing macros out of the way. */
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102 # undef DT_BLK
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103 # undef DT_CHR
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104 # undef DT_DIR
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105 # undef DT_FIFO
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106 # undef DT_LNK
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107 # undef DT_REG
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108 # undef DT_SOCK
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109 # define DT_BLK 1
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110 # define DT_CHR 2
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111 # define DT_DIR 3
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112 # define DT_FIFO 4
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113 # define DT_LNK 5
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114 # define DT_REG 6
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115 # define DT_SOCK 7
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116 #endif
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117
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118 #ifndef S_IFLNK
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119 # define S_IFLNK 0
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120 #endif
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121 #ifndef S_IFSOCK
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122 # define S_IFSOCK 0
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123 #endif
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124
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125 enum
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126 {
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127 NOT_AN_INODE_NUMBER = 0
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128 };
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129
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130 #ifdef D_INO_IN_DIRENT
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131 # define D_INO(dp) (dp)->d_ino
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132 #else
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133 /* Some systems don't have inodes, so fake them to avoid lots of ifdefs. */
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134 # define D_INO(dp) NOT_AN_INODE_NUMBER
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135 #endif
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136
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137 /* If possible (see max_entries, below), read no more than this many directory
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138 entries at a time. Without this limit (i.e., when using non-NULL
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139 fts_compar), processing a directory with 4,000,000 entries requires ~1GiB
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140 of memory, and handling 64M entries would require 16GiB of memory. */
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141 #ifndef FTS_MAX_READDIR_ENTRIES
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142 # define FTS_MAX_READDIR_ENTRIES 100000
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143 #endif
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144
10481
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145 /* If there are more than this many entries in a directory,
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146 and the conditions mentioned below are satisfied, then sort
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147 the entries on inode number before any further processing. */
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148 #ifndef FTS_INODE_SORT_DIR_ENTRIES_THRESHOLD
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149 # define FTS_INODE_SORT_DIR_ENTRIES_THRESHOLD 10000
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150 #endif
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151
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152 enum
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153 {
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154 _FTS_INODE_SORT_DIR_ENTRIES_THRESHOLD = FTS_INODE_SORT_DIR_ENTRIES_THRESHOLD
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155 };
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156
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157 enum Fts_stat
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158 {
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159 FTS_NO_STAT_REQUIRED = 1,
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160 FTS_STAT_REQUIRED = 2
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161 };
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162
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163 #ifdef _LIBC
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164 # undef close
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165 # define close __close
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166 # undef closedir
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167 # define closedir __closedir
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168 # undef fchdir
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169 # define fchdir __fchdir
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170 # undef open
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171 # define open __open
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172 # undef readdir
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173 # define readdir __readdir
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174 #else
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175 # undef internal_function
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176 # define internal_function /* empty */
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177 #endif
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178
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179 #ifndef __set_errno
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180 # define __set_errno(Val) errno = (Val)
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181 #endif
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182
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183 /* If this host provides the openat function, then we can avoid
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184 attempting to open "." in some initialization code below. */
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diff changeset
185 #ifdef HAVE_OPENAT
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186 # define HAVE_OPENAT_SUPPORT 1
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187 #else
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188 # define HAVE_OPENAT_SUPPORT 0
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189 #endif
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190
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191 #ifdef NDEBUG
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192 # define fts_assert(expr) ((void) 0)
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193 #else
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194 # define fts_assert(expr) \
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195 do \
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196 { \
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197 if (!(expr)) \
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198 abort (); \
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199 } \
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200 while (false)
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201 #endif
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202
12421
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203 static FTSENT *fts_alloc (FTS *, const char *, size_t) internal_function;
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204 static FTSENT *fts_build (FTS *, int) internal_function;
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205 static void fts_lfree (FTSENT *) internal_function;
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206 static void fts_load (FTS *, FTSENT *) internal_function;
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207 static size_t fts_maxarglen (char * const *) internal_function;
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208 static void fts_padjust (FTS *, FTSENT *) internal_function;
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209 static bool fts_palloc (FTS *, size_t) internal_function;
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210 static FTSENT *fts_sort (FTS *, FTSENT *, size_t) internal_function;
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211 static unsigned short int fts_stat (FTS *, FTSENT *, bool) internal_function;
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212 static int fts_safe_changedir (FTS *, FTSENT *, int, const char *)
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213 internal_function;
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214
13091
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diff changeset
215 #include "fts-cycle.c"
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216
5858
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217 #ifndef MAX
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218 # define MAX(a,b) ((a) > (b) ? (a) : (b))
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219 #endif
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220
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221 #ifndef SIZE_MAX
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222 # define SIZE_MAX ((size_t) -1)
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diff changeset
223 #endif
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224
12421
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diff changeset
225 #define ISDOT(a) (a[0] == '.' && (!a[1] || (a[1] == '.' && !a[2])))
12772
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226 #define STREQ(a, b) (strcmp (a, b) == 0)
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227
12421
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diff changeset
228 #define CLR(opt) (sp->fts_options &= ~(opt))
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229 #define ISSET(opt) (sp->fts_options & (opt))
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diff changeset
230 #define SET(opt) (sp->fts_options |= (opt))
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231
7639
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232 /* FIXME: FTS_NOCHDIR is now misnamed.
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diff changeset
233 Call it FTS_USE_FULL_RELATIVE_FILE_NAMES instead. */
12421
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diff changeset
234 #define FCHDIR(sp, fd) \
e8d2c6fc33ad Use spaces for indentation, not tabs.
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diff changeset
235 (!ISSET(FTS_NOCHDIR) && (ISSET(FTS_CWDFD) \
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diff changeset
236 ? (cwd_advance_fd ((sp), (fd), true), 0) \
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diff changeset
237 : fchdir (fd)))
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diff changeset
238
5858
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239
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240 /* fts_build flags */
7639
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diff changeset
241 /* FIXME: make this an enum */
12421
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diff changeset
242 #define BCHILD 1 /* fts_children */
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diff changeset
243 #define BNAMES 2 /* fts_children, names only */
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244 #define BREAD 3 /* fts_read */
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245
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diff changeset
246 #if FTS_DEBUG
5894
d09af5fbd9f2 * modules/fts (Files): Remove m4/inttypes-pri.m4.
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diff changeset
247 # include <inttypes.h>
d09af5fbd9f2 * modules/fts (Files): Remove m4/inttypes-pri.m4.
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diff changeset
248 # include <stdint.h>
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diff changeset
249 # include <stdio.h>
7639
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diff changeset
250 # include "getcwdat.h"
5858
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diff changeset
251 bool fts_debug = false;
7639
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252 # define Dprintf(x) do { if (fts_debug) printf x; } while (false)
5858
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diff changeset
253 #else
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diff changeset
254 # define Dprintf(x)
7639
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255 # define fd_ring_check(x)
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diff changeset
256 # define fd_ring_print(a, b, c)
5858
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diff changeset
257 #endif
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diff changeset
258
12421
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diff changeset
259 #define LEAVE_DIR(Fts, Ent, Tag) \
e8d2c6fc33ad Use spaces for indentation, not tabs.
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diff changeset
260 do \
e8d2c6fc33ad Use spaces for indentation, not tabs.
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diff changeset
261 { \
e8d2c6fc33ad Use spaces for indentation, not tabs.
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diff changeset
262 Dprintf ((" %s-leaving: %s\n", Tag, (Ent)->fts_path)); \
e8d2c6fc33ad Use spaces for indentation, not tabs.
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diff changeset
263 leave_dir (Fts, Ent); \
e8d2c6fc33ad Use spaces for indentation, not tabs.
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diff changeset
264 fd_ring_check (Fts); \
e8d2c6fc33ad Use spaces for indentation, not tabs.
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parents: 12378
diff changeset
265 } \
5872
fab6701e5cb2 New fts module.
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diff changeset
266 while (false)
5858
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diff changeset
267
7639
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diff changeset
268 static void
1670d42131d7 Make fts (in FTS_CWDFD mode) more efficient by caching a few open
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diff changeset
269 fd_ring_clear (I_ring *fd_ring)
1670d42131d7 Make fts (in FTS_CWDFD mode) more efficient by caching a few open
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parents: 7635
diff changeset
270 {
1670d42131d7 Make fts (in FTS_CWDFD mode) more efficient by caching a few open
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parents: 7635
diff changeset
271 while ( ! i_ring_empty (fd_ring))
1670d42131d7 Make fts (in FTS_CWDFD mode) more efficient by caching a few open
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parents: 7635
diff changeset
272 {
1670d42131d7 Make fts (in FTS_CWDFD mode) more efficient by caching a few open
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parents: 7635
diff changeset
273 int fd = i_ring_pop (fd_ring);
1670d42131d7 Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents: 7635
diff changeset
274 if (0 <= fd)
12421
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parents: 12378
diff changeset
275 close (fd);
7639
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parents: 7635
diff changeset
276 }
1670d42131d7 Make fts (in FTS_CWDFD mode) more efficient by caching a few open
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parents: 7635
diff changeset
277 }
1670d42131d7 Make fts (in FTS_CWDFD mode) more efficient by caching a few open
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parents: 7635
diff changeset
278
7482
26914593f079 Big performance improvement for fts-based tools that use FTS_NOSTAT.
Jim Meyering <jim@meyering.net>
parents: 7408
diff changeset
279 /* Overload the fts_statp->st_size member (otherwise unused, when
26914593f079 Big performance improvement for fts-based tools that use FTS_NOSTAT.
Jim Meyering <jim@meyering.net>
parents: 7408
diff changeset
280 fts_info is FTS_NSOK) to indicate whether fts_read should stat
26914593f079 Big performance improvement for fts-based tools that use FTS_NOSTAT.
Jim Meyering <jim@meyering.net>
parents: 7408
diff changeset
281 this entry or not. */
26914593f079 Big performance improvement for fts-based tools that use FTS_NOSTAT.
Jim Meyering <jim@meyering.net>
parents: 7408
diff changeset
282 static void
26914593f079 Big performance improvement for fts-based tools that use FTS_NOSTAT.
Jim Meyering <jim@meyering.net>
parents: 7408
diff changeset
283 fts_set_stat_required (FTSENT *p, bool required)
26914593f079 Big performance improvement for fts-based tools that use FTS_NOSTAT.
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parents: 7408
diff changeset
284 {
7785
3246679850d5 Slight readability improvement: use an assert-like macro
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diff changeset
285 fts_assert (p->fts_info == FTS_NSOK);
7482
26914593f079 Big performance improvement for fts-based tools that use FTS_NOSTAT.
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parents: 7408
diff changeset
286 p->fts_statp->st_size = (required
12421
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diff changeset
287 ? FTS_STAT_REQUIRED
e8d2c6fc33ad Use spaces for indentation, not tabs.
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parents: 12378
diff changeset
288 : FTS_NO_STAT_REQUIRED);
7482
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parents: 7408
diff changeset
289 }
26914593f079 Big performance improvement for fts-based tools that use FTS_NOSTAT.
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parents: 7408
diff changeset
290
7151
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diff changeset
291 /* file-descriptor-relative opendir. */
43e3888c56c4 Update from coreutils.
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diff changeset
292 /* FIXME: if others need this function, move it into lib/openat.c */
43e3888c56c4 Update from coreutils.
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diff changeset
293 static inline DIR *
43e3888c56c4 Update from coreutils.
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diff changeset
294 internal_function
13676
223800d7ac7d fts, getcwd, glob: audit for dirfd returning -1
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diff changeset
295 opendirat (int fd, char const *dir, int extra_flags, int *pdir_fd)
7151
43e3888c56c4 Update from coreutils.
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diff changeset
296 {
11939
cd48f861a7a7 fts: make directory fds more robust
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parents: 11938
diff changeset
297 int new_fd = openat (fd, dir,
13674
5c447be5815d fts: use O_NOFOLLOW to avoid race condition when opening a directory
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parents: 13671
diff changeset
298 (O_RDONLY | O_DIRECTORY | O_NOCTTY | O_NONBLOCK
5c447be5815d fts: use O_NOFOLLOW to avoid race condition when opening a directory
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parents: 13671
diff changeset
299 | extra_flags));
7151
43e3888c56c4 Update from coreutils.
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diff changeset
300 DIR *dirp;
43e3888c56c4 Update from coreutils.
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diff changeset
301
43e3888c56c4 Update from coreutils.
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parents: 6949
diff changeset
302 if (new_fd < 0)
43e3888c56c4 Update from coreutils.
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parents: 6949
diff changeset
303 return NULL;
11940
6dd8c8815b1f fts: avoid leaking fds
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parents: 11939
diff changeset
304 set_cloexec_flag (new_fd, true);
7151
43e3888c56c4 Update from coreutils.
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parents: 6949
diff changeset
305 dirp = fdopendir (new_fd);
13676
223800d7ac7d fts, getcwd, glob: audit for dirfd returning -1
Paul Eggert <eggert@cs.ucla.edu>
parents: 13674
diff changeset
306 if (dirp)
223800d7ac7d fts, getcwd, glob: audit for dirfd returning -1
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parents: 13674
diff changeset
307 *pdir_fd = new_fd;
223800d7ac7d fts, getcwd, glob: audit for dirfd returning -1
Paul Eggert <eggert@cs.ucla.edu>
parents: 13674
diff changeset
308 else
7151
43e3888c56c4 Update from coreutils.
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diff changeset
309 {
43e3888c56c4 Update from coreutils.
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parents: 6949
diff changeset
310 int saved_errno = errno;
43e3888c56c4 Update from coreutils.
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parents: 6949
diff changeset
311 close (new_fd);
43e3888c56c4 Update from coreutils.
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parents: 6949
diff changeset
312 errno = saved_errno;
43e3888c56c4 Update from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
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diff changeset
313 }
43e3888c56c4 Update from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 6949
diff changeset
314 return dirp;
43e3888c56c4 Update from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 6949
diff changeset
315 }
43e3888c56c4 Update from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 6949
diff changeset
316
7639
1670d42131d7 Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents: 7635
diff changeset
317 /* Virtual fchdir. Advance SP's working directory file descriptor,
1670d42131d7 Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents: 7635
diff changeset
318 SP->fts_cwd_fd, to FD, and push the previous value onto the fd_ring.
1670d42131d7 Make fts (in FTS_CWDFD mode) more efficient by caching a few open
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diff changeset
319 CHDIR_DOWN_ONE is true if FD corresponds to an entry in the directory
1670d42131d7 Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents: 7635
diff changeset
320 open on sp->fts_cwd_fd; i.e., to move the working directory one level
1670d42131d7 Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents: 7635
diff changeset
321 down. */
7151
43e3888c56c4 Update from coreutils.
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diff changeset
322 static void
43e3888c56c4 Update from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 6949
diff changeset
323 internal_function
7639
1670d42131d7 Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents: 7635
diff changeset
324 cwd_advance_fd (FTS *sp, int fd, bool chdir_down_one)
7151
43e3888c56c4 Update from coreutils.
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parents: 6949
diff changeset
325 {
43e3888c56c4 Update from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 6949
diff changeset
326 int old = sp->fts_cwd_fd;
7785
3246679850d5 Slight readability improvement: use an assert-like macro
Jim Meyering <jim@meyering.net>
parents: 7707
diff changeset
327 fts_assert (old != fd || old == AT_FDCWD);
7639
1670d42131d7 Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents: 7635
diff changeset
328
1670d42131d7 Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents: 7635
diff changeset
329 if (chdir_down_one)
1670d42131d7 Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents: 7635
diff changeset
330 {
1670d42131d7 Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents: 7635
diff changeset
331 /* Push "old" onto the ring.
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
332 If the displaced file descriptor is non-negative, close it. */
7639
1670d42131d7 Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents: 7635
diff changeset
333 int prev_fd_in_slot = i_ring_push (&sp->fts_fd_ring, old);
1670d42131d7 Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents: 7635
diff changeset
334 fd_ring_print (sp, stderr, "post-push");
1670d42131d7 Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents: 7635
diff changeset
335 if (0 <= prev_fd_in_slot)
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
336 close (prev_fd_in_slot); /* ignore any close failure */
7639
1670d42131d7 Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents: 7635
diff changeset
337 }
1670d42131d7 Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents: 7635
diff changeset
338 else if ( ! ISSET (FTS_NOCHDIR))
1670d42131d7 Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents: 7635
diff changeset
339 {
1670d42131d7 Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents: 7635
diff changeset
340 if (0 <= old)
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
341 close (old); /* ignore any close failure */
7639
1670d42131d7 Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents: 7635
diff changeset
342 }
1670d42131d7 Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents: 7635
diff changeset
343
7151
43e3888c56c4 Update from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 6949
diff changeset
344 sp->fts_cwd_fd = fd;
43e3888c56c4 Update from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 6949
diff changeset
345 }
43e3888c56c4 Update from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 6949
diff changeset
346
15988
cd7ac59d8eb5 fts: close parent dir FD before returning from post-traversal fts_read
Jim Meyering <meyering@redhat.com>
parents: 15531
diff changeset
347 /* Restore the initial, pre-traversal, "working directory".
cd7ac59d8eb5 fts: close parent dir FD before returning from post-traversal fts_read
Jim Meyering <meyering@redhat.com>
parents: 15531
diff changeset
348 In FTS_CWDFD mode, we merely call cwd_advance_fd, otherwise,
cd7ac59d8eb5 fts: close parent dir FD before returning from post-traversal fts_read
Jim Meyering <meyering@redhat.com>
parents: 15531
diff changeset
349 we may actually change the working directory.
cd7ac59d8eb5 fts: close parent dir FD before returning from post-traversal fts_read
Jim Meyering <meyering@redhat.com>
parents: 15531
diff changeset
350 Return 0 upon success. Upon failure, set errno and return nonzero. */
cd7ac59d8eb5 fts: close parent dir FD before returning from post-traversal fts_read
Jim Meyering <meyering@redhat.com>
parents: 15531
diff changeset
351 static int
cd7ac59d8eb5 fts: close parent dir FD before returning from post-traversal fts_read
Jim Meyering <meyering@redhat.com>
parents: 15531
diff changeset
352 restore_initial_cwd (FTS *sp)
cd7ac59d8eb5 fts: close parent dir FD before returning from post-traversal fts_read
Jim Meyering <meyering@redhat.com>
parents: 15531
diff changeset
353 {
cd7ac59d8eb5 fts: close parent dir FD before returning from post-traversal fts_read
Jim Meyering <meyering@redhat.com>
parents: 15531
diff changeset
354 int fail = FCHDIR (sp, ISSET (FTS_CWDFD) ? AT_FDCWD : sp->fts_rfd);
cd7ac59d8eb5 fts: close parent dir FD before returning from post-traversal fts_read
Jim Meyering <meyering@redhat.com>
parents: 15531
diff changeset
355 fd_ring_clear (&(sp->fts_fd_ring));
cd7ac59d8eb5 fts: close parent dir FD before returning from post-traversal fts_read
Jim Meyering <meyering@redhat.com>
parents: 15531
diff changeset
356 return fail;
cd7ac59d8eb5 fts: close parent dir FD before returning from post-traversal fts_read
Jim Meyering <meyering@redhat.com>
parents: 15531
diff changeset
357 }
cd7ac59d8eb5 fts: close parent dir FD before returning from post-traversal fts_read
Jim Meyering <meyering@redhat.com>
parents: 15531
diff changeset
358
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
359 /* Open the directory DIR if possible, and return a file
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
360 descriptor. Return -1 and set errno on failure. It doesn't matter
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
361 whether the file descriptor has read or write access. */
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
362
7151
43e3888c56c4 Update from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 6949
diff changeset
363 static inline int
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
364 internal_function
7151
43e3888c56c4 Update from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 6949
diff changeset
365 diropen (FTS const *sp, char const *dir)
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
366 {
13616
acc972b5da60 fcntl-h, etc.: prefer O_SEARCH to O_RDONLY when applicable
Paul Eggert <eggert@cs.ucla.edu>
parents: 13091
diff changeset
367 int open_flags = (O_SEARCH | O_DIRECTORY | O_NOCTTY | O_NONBLOCK
15374
04a9f678e342 fts: introduce FTS_NOATIME
Eric Blake <eblake@redhat.com>
parents: 14774
diff changeset
368 | (ISSET (FTS_PHYSICAL) ? O_NOFOLLOW : 0)
04a9f678e342 fts: introduce FTS_NOATIME
Eric Blake <eblake@redhat.com>
parents: 14774
diff changeset
369 | (ISSET (FTS_NOATIME) ? O_NOATIME : 0));
7151
43e3888c56c4 Update from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 6949
diff changeset
370
11940
6dd8c8815b1f fts: avoid leaking fds
Eric Blake <ebb9@byu.net>
parents: 11939
diff changeset
371 int fd = (ISSET (FTS_CWDFD)
6dd8c8815b1f fts: avoid leaking fds
Eric Blake <ebb9@byu.net>
parents: 11939
diff changeset
372 ? openat (sp->fts_cwd_fd, dir, open_flags)
6dd8c8815b1f fts: avoid leaking fds
Eric Blake <ebb9@byu.net>
parents: 11939
diff changeset
373 : open (dir, open_flags));
6dd8c8815b1f fts: avoid leaking fds
Eric Blake <ebb9@byu.net>
parents: 11939
diff changeset
374 if (0 <= fd)
6dd8c8815b1f fts: avoid leaking fds
Eric Blake <ebb9@byu.net>
parents: 11939
diff changeset
375 set_cloexec_flag (fd, true);
6dd8c8815b1f fts: avoid leaking fds
Eric Blake <ebb9@byu.net>
parents: 11939
diff changeset
376 return fd;
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
377 }
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
378
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
379 FTS *
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
380 fts_open (char * const *argv,
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
381 register int options,
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
382 int (*compar) (FTSENT const **, FTSENT const **))
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
383 {
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
384 register FTS *sp;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
385 register FTSENT *p, *root;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
386 register size_t nitems;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
387 FTSENT *parent = NULL;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
388 FTSENT *tmp = NULL; /* pacify gcc */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
389 bool defer_stat;
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
390
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
391 /* Options check. */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
392 if (options & ~FTS_OPTIONMASK) {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
393 __set_errno (EINVAL);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
394 return (NULL);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
395 }
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
396 if ((options & FTS_NOCHDIR) && (options & FTS_CWDFD)) {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
397 __set_errno (EINVAL);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
398 return (NULL);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
399 }
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
400 if ( ! (options & (FTS_LOGICAL | FTS_PHYSICAL))) {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
401 __set_errno (EINVAL);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
402 return (NULL);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
403 }
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
404
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
405 /* Allocate/initialize the stream */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
406 if ((sp = malloc(sizeof(FTS))) == NULL)
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
407 return (NULL);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
408 memset(sp, 0, sizeof(FTS));
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
409 sp->fts_compar = compar;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
410 sp->fts_options = options;
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
411
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
412 /* Logical walks turn on NOCHDIR; symbolic links are too hard. */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
413 if (ISSET(FTS_LOGICAL)) {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
414 SET(FTS_NOCHDIR);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
415 CLR(FTS_CWDFD);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
416 }
7151
43e3888c56c4 Update from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 6949
diff changeset
417
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
418 /* Initialize fts_cwd_fd. */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
419 sp->fts_cwd_fd = AT_FDCWD;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
420 if ( ISSET(FTS_CWDFD) && ! HAVE_OPENAT_SUPPORT)
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
421 {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
422 /* While it isn't technically necessary to open "." this
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
423 early, doing it here saves us the trouble of ensuring
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
424 later (where it'd be messier) that "." can in fact
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
425 be opened. If not, revert to FTS_NOCHDIR mode. */
15374
04a9f678e342 fts: introduce FTS_NOATIME
Eric Blake <eblake@redhat.com>
parents: 14774
diff changeset
426 int fd = open (".",
04a9f678e342 fts: introduce FTS_NOATIME
Eric Blake <eblake@redhat.com>
parents: 14774
diff changeset
427 O_SEARCH | (ISSET (FTS_NOATIME) ? O_NOATIME : 0));
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
428 if (fd < 0)
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
429 {
16235
18a38c9615f0 In commentary, do not use ` to quote.
Paul Eggert <eggert@cs.ucla.edu>
parents: 16201
diff changeset
430 /* Even if "." is unreadable, don't revert to FTS_NOCHDIR mode
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
431 on systems like Linux+PROC_FS, where our openat emulation
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
432 is good enough. Note: on a system that emulates
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
433 openat via /proc, this technique can still fail, but
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
434 only in extreme conditions, e.g., when the working
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
435 directory cannot be saved (i.e. save_cwd fails) --
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
436 and that happens on Linux only when "." is unreadable
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
437 and the CWD would be longer than PATH_MAX.
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
438 FIXME: once Linux kernel openat support is well established,
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
439 replace the above open call and this entire if/else block
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
440 with the body of the if-block below. */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
441 if ( openat_needs_fchdir ())
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
442 {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
443 SET(FTS_NOCHDIR);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
444 CLR(FTS_CWDFD);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
445 }
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
446 }
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
447 else
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
448 {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
449 close (fd);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
450 }
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
451 }
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
452
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
453 /*
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
454 * Start out with 1K of file name space, and enough, in any case,
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
455 * to hold the user's file names.
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
456 */
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
457 #ifndef MAXPATHLEN
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
458 # define MAXPATHLEN 1024
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
459 #endif
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
460 {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
461 size_t maxarglen = fts_maxarglen(argv);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
462 if (! fts_palloc(sp, MAX(maxarglen, MAXPATHLEN)))
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
463 goto mem1;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
464 }
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
465
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
466 /* Allocate/initialize root's parent. */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
467 if (*argv != NULL) {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
468 if ((parent = fts_alloc(sp, "", 0)) == NULL)
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
469 goto mem2;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
470 parent->fts_level = FTS_ROOTPARENTLEVEL;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
471 }
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
472
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
473 /* The classic fts implementation would call fts_stat with
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
474 a new entry for each iteration of the loop below.
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
475 If the comparison function is not specified or if the
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
476 FTS_DEFER_STAT option is in effect, don't stat any entry
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
477 in this loop. This is an attempt to minimize the interval
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
478 between the initial stat/lstat/fstatat and the point at which
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
479 a directory argument is first opened. This matters for any
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
480 directory command line argument that resides on a file system
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
481 without genuine i-nodes. If you specify FTS_DEFER_STAT along
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
482 with a comparison function, that function must not access any
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
483 data via the fts_statp pointer. */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
484 defer_stat = (compar == NULL || ISSET(FTS_DEFER_STAT));
7482
26914593f079 Big performance improvement for fts-based tools that use FTS_NOSTAT.
Jim Meyering <jim@meyering.net>
parents: 7408
diff changeset
485
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
486 /* Allocate/initialize root(s). */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
487 for (root = NULL, nitems = 0; *argv != NULL; ++argv, ++nitems) {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
488 /* *Do* allow zero-length file names. */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
489 size_t len = strlen(*argv);
17074
d4ccb0388f18 fts: reduce two or more trailing slashes to just one, usually
Jim Meyering <meyering@redhat.com>
parents: 17073
diff changeset
490
d4ccb0388f18 fts: reduce two or more trailing slashes to just one, usually
Jim Meyering <meyering@redhat.com>
parents: 17073
diff changeset
491 /* If there are two or more trailing slashes, trim all but one,
d4ccb0388f18 fts: reduce two or more trailing slashes to just one, usually
Jim Meyering <meyering@redhat.com>
parents: 17073
diff changeset
492 but don't change "//" to "/", and do map "///" to "/". */
d4ccb0388f18 fts: reduce two or more trailing slashes to just one, usually
Jim Meyering <meyering@redhat.com>
parents: 17073
diff changeset
493 char const *v = *argv;
d4ccb0388f18 fts: reduce two or more trailing slashes to just one, usually
Jim Meyering <meyering@redhat.com>
parents: 17073
diff changeset
494 if (2 < len && v[len - 1] == '/')
d4ccb0388f18 fts: reduce two or more trailing slashes to just one, usually
Jim Meyering <meyering@redhat.com>
parents: 17073
diff changeset
495 while (1 < len && v[len - 2] == '/')
d4ccb0388f18 fts: reduce two or more trailing slashes to just one, usually
Jim Meyering <meyering@redhat.com>
parents: 17073
diff changeset
496 --len;
d4ccb0388f18 fts: reduce two or more trailing slashes to just one, usually
Jim Meyering <meyering@redhat.com>
parents: 17073
diff changeset
497
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
498 if ((p = fts_alloc(sp, *argv, len)) == NULL)
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
499 goto mem3;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
500 p->fts_level = FTS_ROOTLEVEL;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
501 p->fts_parent = parent;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
502 p->fts_accpath = p->fts_name;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
503 /* Even when defer_stat is true, be sure to stat the first
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
504 command line argument, since fts_read (at least with
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
505 FTS_XDEV) requires that. */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
506 if (defer_stat && root != NULL) {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
507 p->fts_info = FTS_NSOK;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
508 fts_set_stat_required(p, true);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
509 } else {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
510 p->fts_info = fts_stat(sp, p, false);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
511 }
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
512
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
513 /*
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
514 * If comparison routine supplied, traverse in sorted
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
515 * order; otherwise traverse in the order specified.
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
516 */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
517 if (compar) {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
518 p->fts_link = root;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
519 root = p;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
520 } else {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
521 p->fts_link = NULL;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
522 if (root == NULL)
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
523 tmp = root = p;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
524 else {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
525 tmp->fts_link = p;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
526 tmp = p;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
527 }
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
528 }
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
529 }
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
530 if (compar && nitems > 1)
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
531 root = fts_sort(sp, root, nitems);
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
532
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
533 /*
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
534 * Allocate a dummy pointer and make fts_read think that we've just
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
535 * finished the node before the root(s); set p->fts_info to FTS_INIT
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
536 * so that everything about the "current" node is ignored.
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
537 */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
538 if ((sp->fts_cur = fts_alloc(sp, "", 0)) == NULL)
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
539 goto mem3;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
540 sp->fts_cur->fts_link = root;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
541 sp->fts_cur->fts_info = FTS_INIT;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
542 if (! setup_dir (sp))
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
543 goto mem3;
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
544
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
545 /*
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
546 * If using chdir(2), grab a file descriptor pointing to dot to ensure
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
547 * that we can get back here; this could be avoided for some file names,
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
548 * but almost certainly not worth the effort. Slashes, symbolic links,
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
549 * and ".." are all fairly nasty problems. Note, if we can't get the
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
550 * descriptor we run anyway, just more slowly.
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
551 */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
552 if (!ISSET(FTS_NOCHDIR) && !ISSET(FTS_CWDFD)
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
553 && (sp->fts_rfd = diropen (sp, ".")) < 0)
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
554 SET(FTS_NOCHDIR);
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
555
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
556 i_ring_init (&sp->fts_fd_ring, -1);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
557 return (sp);
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
558
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
559 mem3: fts_lfree(root);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
560 free(parent);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
561 mem2: free(sp->fts_path);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
562 mem1: free(sp);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
563 return (NULL);
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
564 }
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
565
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
566 static void
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
567 internal_function
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
568 fts_load (FTS *sp, register FTSENT *p)
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
569 {
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
570 register size_t len;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
571 register char *cp;
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
572
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
573 /*
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
574 * Load the stream structure for the next traversal. Since we don't
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
575 * actually enter the directory until after the preorder visit, set
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
576 * the fts_accpath field specially so the chdir gets done to the right
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
577 * place and the user can access the first node. From fts_open it's
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
578 * known that the file name will fit.
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
579 */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
580 len = p->fts_pathlen = p->fts_namelen;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
581 memmove(sp->fts_path, p->fts_name, len + 1);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
582 if ((cp = strrchr(p->fts_name, '/')) && (cp != p->fts_name || cp[1])) {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
583 len = strlen(++cp);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
584 memmove(p->fts_name, cp, len + 1);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
585 p->fts_namelen = len;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
586 }
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
587 p->fts_accpath = p->fts_path = sp->fts_path;
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
588 }
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
589
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
590 int
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
591 fts_close (FTS *sp)
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
592 {
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
593 register FTSENT *freep, *p;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
594 int saved_errno = 0;
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
595
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
596 /*
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
597 * This still works if we haven't read anything -- the dummy structure
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
598 * points to the root list, so we step through to the end of the root
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
599 * list which has a valid parent pointer.
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
600 */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
601 if (sp->fts_cur) {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
602 for (p = sp->fts_cur; p->fts_level >= FTS_ROOTLEVEL;) {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
603 freep = p;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
604 p = p->fts_link != NULL ? p->fts_link : p->fts_parent;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
605 free(freep);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
606 }
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
607 free(p);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
608 }
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
609
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
610 /* Free up child linked list, sort array, file name buffer. */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
611 if (sp->fts_child)
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
612 fts_lfree(sp->fts_child);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
613 free(sp->fts_array);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
614 free(sp->fts_path);
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
615
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
616 if (ISSET(FTS_CWDFD))
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
617 {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
618 if (0 <= sp->fts_cwd_fd)
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
619 if (close (sp->fts_cwd_fd))
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
620 saved_errno = errno;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
621 }
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
622 else if (!ISSET(FTS_NOCHDIR))
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
623 {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
624 /* Return to original directory, save errno if necessary. */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
625 if (fchdir(sp->fts_rfd))
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
626 saved_errno = errno;
11924
10d064d93551 fts: fts_close now fails also when closing a dir file descriptor fails
Jim Meyering <meyering@redhat.com>
parents: 11722
diff changeset
627
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
628 /* If close fails, record errno only if saved_errno is zero,
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
629 so that we report the probably-more-meaningful fchdir errno. */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
630 if (close (sp->fts_rfd))
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
631 if (saved_errno == 0)
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
632 saved_errno = errno;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
633 }
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
634
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
635 fd_ring_clear (&sp->fts_fd_ring);
11164
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
636
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
637 if (sp->fts_leaf_optimization_works_ht)
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
638 hash_free (sp->fts_leaf_optimization_works_ht);
11164
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
639
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
640 free_dir (sp);
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
641
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
642 /* Free up the stream pointer. */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
643 free(sp);
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
644
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
645 /* Set errno and return. */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
646 if (saved_errno) {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
647 __set_errno (saved_errno);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
648 return (-1);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
649 }
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
650
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
651 return (0);
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
652 }
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
653
11163
f448fc8fe832 fts: move a function definition "up" (no semantic change)
Jim Meyering <meyering@redhat.com>
parents: 11162
diff changeset
654 #if defined __linux__ \
f448fc8fe832 fts: move a function definition "up" (no semantic change)
Jim Meyering <meyering@redhat.com>
parents: 11162
diff changeset
655 && HAVE_SYS_VFS_H && HAVE_FSTATFS && HAVE_STRUCT_STATFS_F_TYPE
f448fc8fe832 fts: move a function definition "up" (no semantic change)
Jim Meyering <meyering@redhat.com>
parents: 11162
diff changeset
656
14379
2330aac2ae54 maint: adjust cpp indentation to reflect nesting depth
Jim Meyering <meyering@redhat.com>
parents: 14079
diff changeset
657 # include <sys/vfs.h>
11163
f448fc8fe832 fts: move a function definition "up" (no semantic change)
Jim Meyering <meyering@redhat.com>
parents: 11162
diff changeset
658
f448fc8fe832 fts: move a function definition "up" (no semantic change)
Jim Meyering <meyering@redhat.com>
parents: 11162
diff changeset
659 /* Linux-specific constants from coreutils' src/fs.h */
f448fc8fe832 fts: move a function definition "up" (no semantic change)
Jim Meyering <meyering@redhat.com>
parents: 11162
diff changeset
660 # define S_MAGIC_TMPFS 0x1021994
f448fc8fe832 fts: move a function definition "up" (no semantic change)
Jim Meyering <meyering@redhat.com>
parents: 11162
diff changeset
661 # define S_MAGIC_NFS 0x6969
11164
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
662 # define S_MAGIC_REISERFS 0x52654973
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
663 # define S_MAGIC_PROC 0x9FA0
11163
f448fc8fe832 fts: move a function definition "up" (no semantic change)
Jim Meyering <meyering@redhat.com>
parents: 11162
diff changeset
664
f448fc8fe832 fts: move a function definition "up" (no semantic change)
Jim Meyering <meyering@redhat.com>
parents: 11162
diff changeset
665 /* Return false if it is easy to determine the file system type of
f448fc8fe832 fts: move a function definition "up" (no semantic change)
Jim Meyering <meyering@redhat.com>
parents: 11162
diff changeset
666 the directory on which DIR_FD is open, and sorting dirents on
f448fc8fe832 fts: move a function definition "up" (no semantic change)
Jim Meyering <meyering@redhat.com>
parents: 11162
diff changeset
667 inode numbers is known not to improve traversal performance with
f448fc8fe832 fts: move a function definition "up" (no semantic change)
Jim Meyering <meyering@redhat.com>
parents: 11162
diff changeset
668 that type of file system. Otherwise, return true. */
f448fc8fe832 fts: move a function definition "up" (no semantic change)
Jim Meyering <meyering@redhat.com>
parents: 11162
diff changeset
669 static bool
f448fc8fe832 fts: move a function definition "up" (no semantic change)
Jim Meyering <meyering@redhat.com>
parents: 11162
diff changeset
670 dirent_inode_sort_may_be_useful (int dir_fd)
f448fc8fe832 fts: move a function definition "up" (no semantic change)
Jim Meyering <meyering@redhat.com>
parents: 11162
diff changeset
671 {
f448fc8fe832 fts: move a function definition "up" (no semantic change)
Jim Meyering <meyering@redhat.com>
parents: 11162
diff changeset
672 /* Skip the sort only if we can determine efficiently
f448fc8fe832 fts: move a function definition "up" (no semantic change)
Jim Meyering <meyering@redhat.com>
parents: 11162
diff changeset
673 that skipping it is the right thing to do.
f448fc8fe832 fts: move a function definition "up" (no semantic change)
Jim Meyering <meyering@redhat.com>
parents: 11162
diff changeset
674 The cost of performing an unnecessary sort is negligible,
f448fc8fe832 fts: move a function definition "up" (no semantic change)
Jim Meyering <meyering@redhat.com>
parents: 11162
diff changeset
675 while the cost of *not* performing it can be O(N^2) with
f448fc8fe832 fts: move a function definition "up" (no semantic change)
Jim Meyering <meyering@redhat.com>
parents: 11162
diff changeset
676 a very large constant. */
f448fc8fe832 fts: move a function definition "up" (no semantic change)
Jim Meyering <meyering@redhat.com>
parents: 11162
diff changeset
677 struct statfs fs_buf;
f448fc8fe832 fts: move a function definition "up" (no semantic change)
Jim Meyering <meyering@redhat.com>
parents: 11162
diff changeset
678
f448fc8fe832 fts: move a function definition "up" (no semantic change)
Jim Meyering <meyering@redhat.com>
parents: 11162
diff changeset
679 /* If fstatfs fails, assume sorting would be useful. */
f448fc8fe832 fts: move a function definition "up" (no semantic change)
Jim Meyering <meyering@redhat.com>
parents: 11162
diff changeset
680 if (fstatfs (dir_fd, &fs_buf) != 0)
f448fc8fe832 fts: move a function definition "up" (no semantic change)
Jim Meyering <meyering@redhat.com>
parents: 11162
diff changeset
681 return true;
f448fc8fe832 fts: move a function definition "up" (no semantic change)
Jim Meyering <meyering@redhat.com>
parents: 11162
diff changeset
682
f448fc8fe832 fts: move a function definition "up" (no semantic change)
Jim Meyering <meyering@redhat.com>
parents: 11162
diff changeset
683 /* FIXME: what about when f_type is not an integral type?
f448fc8fe832 fts: move a function definition "up" (no semantic change)
Jim Meyering <meyering@redhat.com>
parents: 11162
diff changeset
684 deal with that if/when it's encountered. */
f448fc8fe832 fts: move a function definition "up" (no semantic change)
Jim Meyering <meyering@redhat.com>
parents: 11162
diff changeset
685 switch (fs_buf.f_type)
f448fc8fe832 fts: move a function definition "up" (no semantic change)
Jim Meyering <meyering@redhat.com>
parents: 11162
diff changeset
686 {
f448fc8fe832 fts: move a function definition "up" (no semantic change)
Jim Meyering <meyering@redhat.com>
parents: 11162
diff changeset
687 case S_MAGIC_TMPFS:
f448fc8fe832 fts: move a function definition "up" (no semantic change)
Jim Meyering <meyering@redhat.com>
parents: 11162
diff changeset
688 case S_MAGIC_NFS:
f448fc8fe832 fts: move a function definition "up" (no semantic change)
Jim Meyering <meyering@redhat.com>
parents: 11162
diff changeset
689 /* On a file system of any of these types, sorting
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
690 is unnecessary, and hence wasteful. */
11163
f448fc8fe832 fts: move a function definition "up" (no semantic change)
Jim Meyering <meyering@redhat.com>
parents: 11162
diff changeset
691 return false;
f448fc8fe832 fts: move a function definition "up" (no semantic change)
Jim Meyering <meyering@redhat.com>
parents: 11162
diff changeset
692
f448fc8fe832 fts: move a function definition "up" (no semantic change)
Jim Meyering <meyering@redhat.com>
parents: 11162
diff changeset
693 default:
f448fc8fe832 fts: move a function definition "up" (no semantic change)
Jim Meyering <meyering@redhat.com>
parents: 11162
diff changeset
694 return true;
f448fc8fe832 fts: move a function definition "up" (no semantic change)
Jim Meyering <meyering@redhat.com>
parents: 11162
diff changeset
695 }
f448fc8fe832 fts: move a function definition "up" (no semantic change)
Jim Meyering <meyering@redhat.com>
parents: 11162
diff changeset
696 }
11164
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
697
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
698 /* Given a file descriptor DIR_FD open on a directory D,
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
699 return true if it is valid to apply the leaf-optimization
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
700 technique of counting directories in D via stat.st_nlink. */
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
701 static bool
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
702 leaf_optimization_applies (int dir_fd)
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
703 {
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
704 struct statfs fs_buf;
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
705
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
706 /* If fstatfs fails, assume we can't use the optimization. */
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
707 if (fstatfs (dir_fd, &fs_buf) != 0)
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
708 return false;
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
709
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
710 /* FIXME: do we need to detect AFS mount points? I doubt it,
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
711 unless fstatfs can report S_MAGIC_REISERFS for such a directory. */
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
712
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
713 switch (fs_buf.f_type)
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
714 {
16358
a712776b11ce maint: spelling fixes
Paul Eggert <eggert@cs.ucla.edu>
parents: 16235
diff changeset
715 /* List here the file system types that lack usable dirent.d_type
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
716 info, yet for which the optimization does apply. */
11164
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
717 case S_MAGIC_REISERFS:
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
718 return true;
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
719
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
720 case S_MAGIC_PROC:
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
721 /* Explicitly listing this or any other file system type for which
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
722 the optimization is not applicable is not necessary, but we leave
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
723 it here to document the risk. Per http://bugs.debian.org/143111,
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
724 /proc may have bogus stat.st_nlink values. */
11164
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
725 /* fall through */
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
726 default:
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
727 return false;
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
728 }
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
729 }
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
730
11163
f448fc8fe832 fts: move a function definition "up" (no semantic change)
Jim Meyering <meyering@redhat.com>
parents: 11162
diff changeset
731 #else
12050
d1840b588599 fts: avoid compiler warning
Eric Blake <ebb9@byu.net>
parents: 11946
diff changeset
732 static bool
12482
11bc92a9e2bc gnulib-common: prefer _GL_UNUSED over _UNUSED_PARAMETER_
Eric Blake <ebb9@byu.net>
parents: 12421
diff changeset
733 dirent_inode_sort_may_be_useful (int dir_fd _GL_UNUSED) { return true; }
12050
d1840b588599 fts: avoid compiler warning
Eric Blake <ebb9@byu.net>
parents: 11946
diff changeset
734 static bool
12482
11bc92a9e2bc gnulib-common: prefer _GL_UNUSED over _UNUSED_PARAMETER_
Eric Blake <ebb9@byu.net>
parents: 12421
diff changeset
735 leaf_optimization_applies (int dir_fd _GL_UNUSED) { return false; }
11163
f448fc8fe832 fts: move a function definition "up" (no semantic change)
Jim Meyering <meyering@redhat.com>
parents: 11162
diff changeset
736 #endif
f448fc8fe832 fts: move a function definition "up" (no semantic change)
Jim Meyering <meyering@redhat.com>
parents: 11162
diff changeset
737
11164
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
738 /* link-count-optimization entry:
14774
70d101744577 maint: correct misuse of "a" and "an"
Jim Meyering <meyering@redhat.com>
parents: 14612
diff changeset
739 map a stat.st_dev number to a boolean: leaf_optimization_works */
11164
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
740 struct LCO_ent
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
741 {
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
742 dev_t st_dev;
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
743 bool opt_ok;
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
744 };
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
745
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
746 /* Use a tiny initial size. If a traversal encounters more than
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
747 a few devices, the cost of growing/rehashing this table will be
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
748 rendered negligible by the number of inodes processed. */
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
749 enum { LCO_HT_INITIAL_SIZE = 13 };
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
750
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
751 static size_t
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
752 LCO_hash (void const *x, size_t table_size)
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
753 {
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
754 struct LCO_ent const *ax = x;
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
755 return (uintmax_t) ax->st_dev % table_size;
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
756 }
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
757
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
758 static bool
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
759 LCO_compare (void const *x, void const *y)
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
760 {
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
761 struct LCO_ent const *ax = x;
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
762 struct LCO_ent const *ay = y;
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
763 return ax->st_dev == ay->st_dev;
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
764 }
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
765
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
766 /* Ask the same question as leaf_optimization_applies, but query
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
767 the cache first (FTS.fts_leaf_optimization_works_ht), and if necessary,
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
768 update that cache. */
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
769 static bool
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
770 link_count_optimize_ok (FTSENT const *p)
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
771 {
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
772 FTS *sp = p->fts_fts;
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
773 Hash_table *h = sp->fts_leaf_optimization_works_ht;
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
774 struct LCO_ent tmp;
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
775 struct LCO_ent *ent;
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
776 bool opt_ok;
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
777 struct LCO_ent *t2;
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
778
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
779 /* If we're not in CWDFD mode, don't bother with this optimization,
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
780 since the caller is not serious about performance. */
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
781 if (!ISSET(FTS_CWDFD))
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
782 return false;
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
783
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
784 /* map st_dev to the boolean, leaf_optimization_works */
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
785 if (h == NULL)
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
786 {
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
787 h = sp->fts_leaf_optimization_works_ht
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
788 = hash_initialize (LCO_HT_INITIAL_SIZE, NULL, LCO_hash,
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
789 LCO_compare, free);
11164
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
790 if (h == NULL)
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
791 return false;
11164
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
792 }
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
793 tmp.st_dev = p->fts_statp->st_dev;
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
794 ent = hash_lookup (h, &tmp);
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
795 if (ent)
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
796 return ent->opt_ok;
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
797
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
798 /* Look-up failed. Query directly and cache the result. */
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
799 t2 = malloc (sizeof *t2);
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
800 if (t2 == NULL)
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
801 return false;
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
802
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
803 /* Is it ok to perform the optimization in the dir, FTS_CWD_FD? */
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
804 opt_ok = leaf_optimization_applies (sp->fts_cwd_fd);
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
805 t2->opt_ok = opt_ok;
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
806 t2->st_dev = p->fts_statp->st_dev;
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
807
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
808 ent = hash_insert (h, t2);
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
809 if (ent == NULL)
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
810 {
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
811 /* insertion failed */
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
812 free (t2);
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
813 return false;
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
814 }
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
815 fts_assert (ent == t2);
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
816
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
817 return opt_ok;
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
818 }
90715da41753 fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents: 11163
diff changeset
819
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
820 /*
5907
c47674a83a78 Sync from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 5894
diff changeset
821 * Special case of "/" at the end of the file name so that slashes aren't
c47674a83a78 Sync from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 5894
diff changeset
822 * appended which would cause file names to be written as "....//foo".
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
823 */
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
824 #define NAPPEND(p) \
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
825 (p->fts_path[p->fts_pathlen - 1] == '/' \
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
826 ? p->fts_pathlen - 1 : p->fts_pathlen)
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
827
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
828 FTSENT *
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
829 fts_read (register FTS *sp)
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
830 {
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
831 register FTSENT *p, *tmp;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
832 register unsigned short int instr;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
833 register char *t;
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
834
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
835 /* If finished or unrecoverable error, return NULL. */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
836 if (sp->fts_cur == NULL || ISSET(FTS_STOP))
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
837 return (NULL);
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
838
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
839 /* Set current node pointer. */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
840 p = sp->fts_cur;
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
841
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
842 /* Save and zero out user instructions. */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
843 instr = p->fts_instr;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
844 p->fts_instr = FTS_NOINSTR;
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
845
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
846 /* Any type of file may be re-visited; re-stat and re-turn. */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
847 if (instr == FTS_AGAIN) {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
848 p->fts_info = fts_stat(sp, p, false);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
849 return (p);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
850 }
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
851 Dprintf (("fts_read: p=%s\n",
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
852 p->fts_info == FTS_INIT ? "" : p->fts_path));
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
853
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
854 /*
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
855 * Following a symlink -- SLNONE test allows application to see
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
856 * SLNONE and recover. If indirecting through a symlink, have
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
857 * keep a pointer to current location. If unable to get that
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
858 * pointer, follow fails.
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
859 */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
860 if (instr == FTS_FOLLOW &&
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
861 (p->fts_info == FTS_SL || p->fts_info == FTS_SLNONE)) {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
862 p->fts_info = fts_stat(sp, p, true);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
863 if (p->fts_info == FTS_D && !ISSET(FTS_NOCHDIR)) {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
864 if ((p->fts_symfd = diropen (sp, ".")) < 0) {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
865 p->fts_errno = errno;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
866 p->fts_info = FTS_ERR;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
867 } else
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
868 p->fts_flags |= FTS_SYMFOLLOW;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
869 }
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
870 goto check_for_dir;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
871 }
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
872
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
873 /* Directory in pre-order. */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
874 if (p->fts_info == FTS_D) {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
875 /* If skipped or crossed mount point, do post-order visit. */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
876 if (instr == FTS_SKIP ||
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
877 (ISSET(FTS_XDEV) && p->fts_statp->st_dev != sp->fts_dev)) {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
878 if (p->fts_flags & FTS_SYMFOLLOW)
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
879 (void)close(p->fts_symfd);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
880 if (sp->fts_child) {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
881 fts_lfree(sp->fts_child);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
882 sp->fts_child = NULL;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
883 }
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
884 p->fts_info = FTS_DP;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
885 LEAVE_DIR (sp, p, "1");
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
886 return (p);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
887 }
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
888
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
889 /* Rebuild if only read the names and now traversing. */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
890 if (sp->fts_child != NULL && ISSET(FTS_NAMEONLY)) {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
891 CLR(FTS_NAMEONLY);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
892 fts_lfree(sp->fts_child);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
893 sp->fts_child = NULL;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
894 }
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
895
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
896 /*
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
897 * Cd to the subdirectory.
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
898 *
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
899 * If have already read and now fail to chdir, whack the list
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
900 * to make the names come out right, and set the parent errno
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
901 * so the application will eventually get an error condition.
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
902 * Set the FTS_DONTCHDIR flag so that when we logically change
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
903 * directories back to the parent we don't do a chdir.
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
904 *
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
905 * If haven't read do so. If the read fails, fts_build sets
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
906 * FTS_STOP or the fts_info field of the node.
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
907 */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
908 if (sp->fts_child != NULL) {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
909 if (fts_safe_changedir(sp, p, -1, p->fts_accpath)) {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
910 p->fts_errno = errno;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
911 p->fts_flags |= FTS_DONTCHDIR;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
912 for (p = sp->fts_child; p != NULL;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
913 p = p->fts_link)
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
914 p->fts_accpath =
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
915 p->fts_parent->fts_accpath;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
916 }
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
917 } else if ((sp->fts_child = fts_build(sp, BREAD)) == NULL) {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
918 if (ISSET(FTS_STOP))
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
919 return (NULL);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
920 /* If fts_build's call to fts_safe_changedir failed
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
921 because it was not able to fchdir into a
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
922 subdirectory, tell the caller. */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
923 if (p->fts_errno && p->fts_info != FTS_DNR)
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
924 p->fts_info = FTS_ERR;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
925 LEAVE_DIR (sp, p, "2");
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
926 return (p);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
927 }
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
928 p = sp->fts_child;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
929 sp->fts_child = NULL;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
930 goto name;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
931 }
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
932
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
933 /* Move to the next node on this level. */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
934 next: tmp = p;
15531
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
935
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
936 /* If we have so many directory entries that we're reading them
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
937 in batches, and we've reached the end of the current batch,
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
938 read in a new batch. */
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
939 if (p->fts_link == NULL && p->fts_parent->fts_dirp)
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
940 {
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
941 p = tmp->fts_parent;
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
942 sp->fts_cur = p;
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
943 sp->fts_path[p->fts_pathlen] = '\0';
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
944
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
945 if ((p = fts_build (sp, BREAD)) == NULL)
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
946 {
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
947 if (ISSET(FTS_STOP))
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
948 return NULL;
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
949 goto cd_dot_dot;
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
950 }
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
951
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
952 free(tmp);
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
953 goto name;
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
954 }
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
955
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
956 if ((p = p->fts_link) != NULL) {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
957 sp->fts_cur = p;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
958 free(tmp);
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
959
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
960 /*
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
961 * If reached the top, return to the original directory (or
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
962 * the root of the tree), and load the file names for the next
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
963 * root.
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
964 */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
965 if (p->fts_level == FTS_ROOTLEVEL) {
15988
cd7ac59d8eb5 fts: close parent dir FD before returning from post-traversal fts_read
Jim Meyering <meyering@redhat.com>
parents: 15531
diff changeset
966 if (restore_initial_cwd(sp)) {
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
967 SET(FTS_STOP);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
968 return (NULL);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
969 }
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
970 free_dir(sp);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
971 fts_load(sp, p);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
972 setup_dir(sp);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
973 goto check_for_dir;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
974 }
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
975
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
976 /*
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
977 * User may have called fts_set on the node. If skipped,
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
978 * ignore. If followed, get a file descriptor so we can
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
979 * get back if necessary.
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
980 */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
981 if (p->fts_instr == FTS_SKIP)
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
982 goto next;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
983 if (p->fts_instr == FTS_FOLLOW) {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
984 p->fts_info = fts_stat(sp, p, true);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
985 if (p->fts_info == FTS_D && !ISSET(FTS_NOCHDIR)) {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
986 if ((p->fts_symfd = diropen (sp, ".")) < 0) {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
987 p->fts_errno = errno;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
988 p->fts_info = FTS_ERR;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
989 } else
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
990 p->fts_flags |= FTS_SYMFOLLOW;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
991 }
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
992 p->fts_instr = FTS_NOINSTR;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
993 }
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
994
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
995 name: t = sp->fts_path + NAPPEND(p->fts_parent);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
996 *t++ = '/';
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
997 memmove(t, p->fts_name, p->fts_namelen + 1);
5872
fab6701e5cb2 New fts module.
Paul Eggert <eggert@cs.ucla.edu>
parents: 5867
diff changeset
998 check_for_dir:
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
999 sp->fts_cur = p;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1000 if (p->fts_info == FTS_NSOK)
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1001 {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1002 if (p->fts_statp->st_size == FTS_STAT_REQUIRED)
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1003 {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1004 FTSENT *parent = p->fts_parent;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1005 if (FTS_ROOTLEVEL < p->fts_level
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1006 /* ->fts_n_dirs_remaining is not valid
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1007 for command-line-specified names. */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1008 && parent->fts_n_dirs_remaining == 0
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1009 && ISSET(FTS_NOSTAT)
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1010 && ISSET(FTS_PHYSICAL)
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1011 && link_count_optimize_ok (parent))
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1012 {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1013 /* nothing more needed */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1014 }
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1015 else
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1016 {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1017 p->fts_info = fts_stat(sp, p, false);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1018 if (S_ISDIR(p->fts_statp->st_mode)
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1019 && p->fts_level != FTS_ROOTLEVEL
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1020 && parent->fts_n_dirs_remaining)
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1021 parent->fts_n_dirs_remaining--;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1022 }
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1023 }
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1024 else
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1025 fts_assert (p->fts_statp->st_size == FTS_NO_STAT_REQUIRED);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1026 }
7707
3f57a32346a2 * lib/fts.c (fts_load): Don't set sp->fts_dev here, since
Jim Meyering <jim@meyering.net>
parents: 7684
diff changeset
1027
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1028 if (p->fts_info == FTS_D)
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1029 {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1030 /* Now that P->fts_statp is guaranteed to be valid,
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1031 if this is a command-line directory, record its
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1032 device number, to be used for FTS_XDEV. */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1033 if (p->fts_level == FTS_ROOTLEVEL)
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1034 sp->fts_dev = p->fts_statp->st_dev;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1035 Dprintf ((" entering: %s\n", p->fts_path));
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1036 if (! enter_dir (sp, p))
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1037 {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1038 __set_errno (ENOMEM);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1039 return NULL;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1040 }
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1041 }
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1042 return p;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1043 }
15531
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
1044 cd_dot_dot:
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1045
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1046 /* Move up to the parent node. */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1047 p = tmp->fts_parent;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1048 sp->fts_cur = p;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1049 free(tmp);
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1050
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1051 if (p->fts_level == FTS_ROOTPARENTLEVEL) {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1052 /*
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1053 * Done; free everything up and set errno to 0 so the user
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1054 * can distinguish between error and EOF.
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1055 */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1056 free(p);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1057 __set_errno (0);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1058 return (sp->fts_cur = NULL);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1059 }
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1060
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1061 fts_assert (p->fts_info != FTS_NSOK);
7482
26914593f079 Big performance improvement for fts-based tools that use FTS_NOSTAT.
Jim Meyering <jim@meyering.net>
parents: 7408
diff changeset
1062
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1063 /* NUL terminate the file name. */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1064 sp->fts_path[p->fts_pathlen] = '\0';
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1065
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1066 /*
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1067 * Return to the parent directory. If at a root node, restore
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1068 * the initial working directory. If we came through a symlink,
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1069 * go back through the file descriptor. Otherwise, move up
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1070 * one level, via "..".
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1071 */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1072 if (p->fts_level == FTS_ROOTLEVEL) {
15988
cd7ac59d8eb5 fts: close parent dir FD before returning from post-traversal fts_read
Jim Meyering <meyering@redhat.com>
parents: 15531
diff changeset
1073 if (restore_initial_cwd(sp)) {
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1074 p->fts_errno = errno;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1075 SET(FTS_STOP);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1076 }
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1077 } else if (p->fts_flags & FTS_SYMFOLLOW) {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1078 if (FCHDIR(sp, p->fts_symfd)) {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1079 int saved_errno = errno;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1080 (void)close(p->fts_symfd);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1081 __set_errno (saved_errno);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1082 p->fts_errno = errno;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1083 SET(FTS_STOP);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1084 }
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1085 (void)close(p->fts_symfd);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1086 } else if (!(p->fts_flags & FTS_DONTCHDIR) &&
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1087 fts_safe_changedir(sp, p->fts_parent, -1, "..")) {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1088 p->fts_errno = errno;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1089 SET(FTS_STOP);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1090 }
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1091 p->fts_info = p->fts_errno ? FTS_ERR : FTS_DP;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1092 if (p->fts_errno == 0)
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1093 LEAVE_DIR (sp, p, "3");
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1094 return ISSET(FTS_STOP) ? NULL : p;
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1095 }
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1096
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1097 /*
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1098 * Fts_set takes the stream as an argument although it's not used in this
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1099 * implementation; it would be necessary if anyone wanted to add global
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1100 * semantics to fts using fts_set. An error return is allowed for similar
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1101 * reasons.
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1102 */
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1103 /* ARGSUSED */
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1104 int
12482
11bc92a9e2bc gnulib-common: prefer _GL_UNUSED over _UNUSED_PARAMETER_
Eric Blake <ebb9@byu.net>
parents: 12421
diff changeset
1105 fts_set(FTS *sp _GL_UNUSED, FTSENT *p, int instr)
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1106 {
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1107 if (instr != 0 && instr != FTS_AGAIN && instr != FTS_FOLLOW &&
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1108 instr != FTS_NOINSTR && instr != FTS_SKIP) {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1109 __set_errno (EINVAL);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1110 return (1);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1111 }
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1112 p->fts_instr = instr;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1113 return (0);
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1114 }
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1115
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1116 FTSENT *
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1117 fts_children (register FTS *sp, int instr)
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1118 {
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1119 register FTSENT *p;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1120 int fd;
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1121
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1122 if (instr != 0 && instr != FTS_NAMEONLY) {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1123 __set_errno (EINVAL);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1124 return (NULL);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1125 }
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1126
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1127 /* Set current node pointer. */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1128 p = sp->fts_cur;
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1129
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1130 /*
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1131 * Errno set to 0 so user can distinguish empty directory from
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1132 * an error.
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1133 */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1134 __set_errno (0);
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1135
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1136 /* Fatal errors stop here. */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1137 if (ISSET(FTS_STOP))
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1138 return (NULL);
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1139
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1140 /* Return logical hierarchy of user's arguments. */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1141 if (p->fts_info == FTS_INIT)
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1142 return (p->fts_link);
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1143
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1144 /*
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1145 * If not a directory being visited in pre-order, stop here. Could
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1146 * allow FTS_DNR, assuming the user has fixed the problem, but the
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1147 * same effect is available with FTS_AGAIN.
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1148 */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1149 if (p->fts_info != FTS_D /* && p->fts_info != FTS_DNR */)
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1150 return (NULL);
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1151
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1152 /* Free up any previous child list. */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1153 if (sp->fts_child != NULL)
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1154 fts_lfree(sp->fts_child);
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1155
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1156 if (instr == FTS_NAMEONLY) {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1157 SET(FTS_NAMEONLY);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1158 instr = BNAMES;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1159 } else
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1160 instr = BCHILD;
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1161
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1162 /*
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1163 * If using chdir on a relative file name and called BEFORE fts_read
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1164 * does its chdir to the root of a traversal, we can lose -- we need to
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1165 * chdir into the subdirectory, and we don't know where the current
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1166 * directory is, so we can't get back so that the upcoming chdir by
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1167 * fts_read will work.
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1168 */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1169 if (p->fts_level != FTS_ROOTLEVEL || p->fts_accpath[0] == '/' ||
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1170 ISSET(FTS_NOCHDIR))
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1171 return (sp->fts_child = fts_build(sp, instr));
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1172
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1173 if ((fd = diropen (sp, ".")) < 0)
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1174 return (sp->fts_child = NULL);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1175 sp->fts_child = fts_build(sp, instr);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1176 if (ISSET(FTS_CWDFD))
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1177 {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1178 cwd_advance_fd (sp, fd, true);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1179 }
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1180 else
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1181 {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1182 if (fchdir(fd))
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1183 {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1184 int saved_errno = errno;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1185 close (fd);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1186 __set_errno (saved_errno);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1187 return NULL;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1188 }
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1189 close (fd);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1190 }
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1191 return (sp->fts_child);
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1192 }
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1193
10481
47fe4e48e158 fts: sort dirent entries on inode number before traversing
Jim Meyering <meyering@redhat.com>
parents: 9718
diff changeset
1194 /* A comparison function to sort on increasing inode number.
47fe4e48e158 fts: sort dirent entries on inode number before traversing
Jim Meyering <meyering@redhat.com>
parents: 9718
diff changeset
1195 For some file system types, sorting either way makes a huge
47fe4e48e158 fts: sort dirent entries on inode number before traversing
Jim Meyering <meyering@redhat.com>
parents: 9718
diff changeset
1196 performance difference for a directory with very many entries,
47fe4e48e158 fts: sort dirent entries on inode number before traversing
Jim Meyering <meyering@redhat.com>
parents: 9718
diff changeset
1197 but sorting on increasing values is slightly better than sorting
47fe4e48e158 fts: sort dirent entries on inode number before traversing
Jim Meyering <meyering@redhat.com>
parents: 9718
diff changeset
1198 on decreasing values. The difference is in the 5% range. */
47fe4e48e158 fts: sort dirent entries on inode number before traversing
Jim Meyering <meyering@redhat.com>
parents: 9718
diff changeset
1199 static int
47fe4e48e158 fts: sort dirent entries on inode number before traversing
Jim Meyering <meyering@redhat.com>
parents: 9718
diff changeset
1200 fts_compare_ino (struct _ftsent const **a, struct _ftsent const **b)
47fe4e48e158 fts: sort dirent entries on inode number before traversing
Jim Meyering <meyering@redhat.com>
parents: 9718
diff changeset
1201 {
10482
e8d1a5b2c49c fts: tweak inode comparison function
Jim Meyering <meyering@redhat.com>
parents: 10481
diff changeset
1202 return (a[0]->fts_statp->st_ino < b[0]->fts_statp->st_ino ? -1
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1203 : b[0]->fts_statp->st_ino < a[0]->fts_statp->st_ino ? 1 : 0);
10481
47fe4e48e158 fts: sort dirent entries on inode number before traversing
Jim Meyering <meyering@redhat.com>
parents: 9718
diff changeset
1204 }
47fe4e48e158 fts: sort dirent entries on inode number before traversing
Jim Meyering <meyering@redhat.com>
parents: 9718
diff changeset
1205
10843
36479bd141ee fts: provide dirent.d_type via FTSENT.fts_statp, when possible
Jim Meyering <meyering@redhat.com>
parents: 10688
diff changeset
1206 /* Map the dirent.d_type value, DTYPE, to the corresponding stat.st_mode
36479bd141ee fts: provide dirent.d_type via FTSENT.fts_statp, when possible
Jim Meyering <meyering@redhat.com>
parents: 10688
diff changeset
1207 S_IF* bit and set ST.st_mode, thus clearing all other bits in that field. */
36479bd141ee fts: provide dirent.d_type via FTSENT.fts_statp, when possible
Jim Meyering <meyering@redhat.com>
parents: 10688
diff changeset
1208 static void
36479bd141ee fts: provide dirent.d_type via FTSENT.fts_statp, when possible
Jim Meyering <meyering@redhat.com>
parents: 10688
diff changeset
1209 set_stat_type (struct stat *st, unsigned int dtype)
36479bd141ee fts: provide dirent.d_type via FTSENT.fts_statp, when possible
Jim Meyering <meyering@redhat.com>
parents: 10688
diff changeset
1210 {
36479bd141ee fts: provide dirent.d_type via FTSENT.fts_statp, when possible
Jim Meyering <meyering@redhat.com>
parents: 10688
diff changeset
1211 mode_t type;
36479bd141ee fts: provide dirent.d_type via FTSENT.fts_statp, when possible
Jim Meyering <meyering@redhat.com>
parents: 10688
diff changeset
1212 switch (dtype)
36479bd141ee fts: provide dirent.d_type via FTSENT.fts_statp, when possible
Jim Meyering <meyering@redhat.com>
parents: 10688
diff changeset
1213 {
36479bd141ee fts: provide dirent.d_type via FTSENT.fts_statp, when possible
Jim Meyering <meyering@redhat.com>
parents: 10688
diff changeset
1214 case DT_BLK:
36479bd141ee fts: provide dirent.d_type via FTSENT.fts_statp, when possible
Jim Meyering <meyering@redhat.com>
parents: 10688
diff changeset
1215 type = S_IFBLK;
36479bd141ee fts: provide dirent.d_type via FTSENT.fts_statp, when possible
Jim Meyering <meyering@redhat.com>
parents: 10688
diff changeset
1216 break;
36479bd141ee fts: provide dirent.d_type via FTSENT.fts_statp, when possible
Jim Meyering <meyering@redhat.com>
parents: 10688
diff changeset
1217 case DT_CHR:
36479bd141ee fts: provide dirent.d_type via FTSENT.fts_statp, when possible
Jim Meyering <meyering@redhat.com>
parents: 10688
diff changeset
1218 type = S_IFCHR;
36479bd141ee fts: provide dirent.d_type via FTSENT.fts_statp, when possible
Jim Meyering <meyering@redhat.com>
parents: 10688
diff changeset
1219 break;
36479bd141ee fts: provide dirent.d_type via FTSENT.fts_statp, when possible
Jim Meyering <meyering@redhat.com>
parents: 10688
diff changeset
1220 case DT_DIR:
36479bd141ee fts: provide dirent.d_type via FTSENT.fts_statp, when possible
Jim Meyering <meyering@redhat.com>
parents: 10688
diff changeset
1221 type = S_IFDIR;
36479bd141ee fts: provide dirent.d_type via FTSENT.fts_statp, when possible
Jim Meyering <meyering@redhat.com>
parents: 10688
diff changeset
1222 break;
36479bd141ee fts: provide dirent.d_type via FTSENT.fts_statp, when possible
Jim Meyering <meyering@redhat.com>
parents: 10688
diff changeset
1223 case DT_FIFO:
36479bd141ee fts: provide dirent.d_type via FTSENT.fts_statp, when possible
Jim Meyering <meyering@redhat.com>
parents: 10688
diff changeset
1224 type = S_IFIFO;
36479bd141ee fts: provide dirent.d_type via FTSENT.fts_statp, when possible
Jim Meyering <meyering@redhat.com>
parents: 10688
diff changeset
1225 break;
36479bd141ee fts: provide dirent.d_type via FTSENT.fts_statp, when possible
Jim Meyering <meyering@redhat.com>
parents: 10688
diff changeset
1226 case DT_LNK:
36479bd141ee fts: provide dirent.d_type via FTSENT.fts_statp, when possible
Jim Meyering <meyering@redhat.com>
parents: 10688
diff changeset
1227 type = S_IFLNK;
36479bd141ee fts: provide dirent.d_type via FTSENT.fts_statp, when possible
Jim Meyering <meyering@redhat.com>
parents: 10688
diff changeset
1228 break;
36479bd141ee fts: provide dirent.d_type via FTSENT.fts_statp, when possible
Jim Meyering <meyering@redhat.com>
parents: 10688
diff changeset
1229 case DT_REG:
36479bd141ee fts: provide dirent.d_type via FTSENT.fts_statp, when possible
Jim Meyering <meyering@redhat.com>
parents: 10688
diff changeset
1230 type = S_IFREG;
36479bd141ee fts: provide dirent.d_type via FTSENT.fts_statp, when possible
Jim Meyering <meyering@redhat.com>
parents: 10688
diff changeset
1231 break;
36479bd141ee fts: provide dirent.d_type via FTSENT.fts_statp, when possible
Jim Meyering <meyering@redhat.com>
parents: 10688
diff changeset
1232 case DT_SOCK:
36479bd141ee fts: provide dirent.d_type via FTSENT.fts_statp, when possible
Jim Meyering <meyering@redhat.com>
parents: 10688
diff changeset
1233 type = S_IFSOCK;
36479bd141ee fts: provide dirent.d_type via FTSENT.fts_statp, when possible
Jim Meyering <meyering@redhat.com>
parents: 10688
diff changeset
1234 break;
36479bd141ee fts: provide dirent.d_type via FTSENT.fts_statp, when possible
Jim Meyering <meyering@redhat.com>
parents: 10688
diff changeset
1235 default:
36479bd141ee fts: provide dirent.d_type via FTSENT.fts_statp, when possible
Jim Meyering <meyering@redhat.com>
parents: 10688
diff changeset
1236 type = 0;
36479bd141ee fts: provide dirent.d_type via FTSENT.fts_statp, when possible
Jim Meyering <meyering@redhat.com>
parents: 10688
diff changeset
1237 }
10844
70fc7855343a fts: fix a thinko
Jim Meyering <meyering@redhat.com>
parents: 10843
diff changeset
1238 st->st_mode = type;
10843
36479bd141ee fts: provide dirent.d_type via FTSENT.fts_statp, when possible
Jim Meyering <meyering@redhat.com>
parents: 10688
diff changeset
1239 }
36479bd141ee fts: provide dirent.d_type via FTSENT.fts_statp, when possible
Jim Meyering <meyering@redhat.com>
parents: 10688
diff changeset
1240
15529
894e5e6ae541 fts: add/use new struct member, fts_dirp
Jim Meyering <meyering@redhat.com>
parents: 15528
diff changeset
1241 #define closedir_and_clear(dirp) \
894e5e6ae541 fts: add/use new struct member, fts_dirp
Jim Meyering <meyering@redhat.com>
parents: 15528
diff changeset
1242 do \
894e5e6ae541 fts: add/use new struct member, fts_dirp
Jim Meyering <meyering@redhat.com>
parents: 15528
diff changeset
1243 { \
894e5e6ae541 fts: add/use new struct member, fts_dirp
Jim Meyering <meyering@redhat.com>
parents: 15528
diff changeset
1244 closedir (dirp); \
894e5e6ae541 fts: add/use new struct member, fts_dirp
Jim Meyering <meyering@redhat.com>
parents: 15528
diff changeset
1245 dirp = NULL; \
894e5e6ae541 fts: add/use new struct member, fts_dirp
Jim Meyering <meyering@redhat.com>
parents: 15528
diff changeset
1246 } \
894e5e6ae541 fts: add/use new struct member, fts_dirp
Jim Meyering <meyering@redhat.com>
parents: 15528
diff changeset
1247 while (0)
894e5e6ae541 fts: add/use new struct member, fts_dirp
Jim Meyering <meyering@redhat.com>
parents: 15528
diff changeset
1248
15528
8203b056cc79 maint: fts: give __opendir2 a new parameter and rename
Jim Meyering <meyering@redhat.com>
parents: 15527
diff changeset
1249 #define fts_opendir(file, Pdir_fd) \
15525
792927a7e09d maint: fts.c: move __opendir2 #define "up" out of function body
Jim Meyering <meyering@redhat.com>
parents: 15524
diff changeset
1250 opendirat((! ISSET(FTS_NOCHDIR) && ISSET(FTS_CWDFD) \
792927a7e09d maint: fts.c: move __opendir2 #define "up" out of function body
Jim Meyering <meyering@redhat.com>
parents: 15524
diff changeset
1251 ? sp->fts_cwd_fd : AT_FDCWD), \
792927a7e09d maint: fts.c: move __opendir2 #define "up" out of function body
Jim Meyering <meyering@redhat.com>
parents: 15524
diff changeset
1252 file, \
792927a7e09d maint: fts.c: move __opendir2 #define "up" out of function body
Jim Meyering <meyering@redhat.com>
parents: 15524
diff changeset
1253 (((ISSET(FTS_PHYSICAL) \
792927a7e09d maint: fts.c: move __opendir2 #define "up" out of function body
Jim Meyering <meyering@redhat.com>
parents: 15524
diff changeset
1254 && ! (ISSET(FTS_COMFOLLOW) \
792927a7e09d maint: fts.c: move __opendir2 #define "up" out of function body
Jim Meyering <meyering@redhat.com>
parents: 15524
diff changeset
1255 && cur->fts_level == FTS_ROOTLEVEL)) \
792927a7e09d maint: fts.c: move __opendir2 #define "up" out of function body
Jim Meyering <meyering@redhat.com>
parents: 15524
diff changeset
1256 ? O_NOFOLLOW : 0) \
792927a7e09d maint: fts.c: move __opendir2 #define "up" out of function body
Jim Meyering <meyering@redhat.com>
parents: 15524
diff changeset
1257 | (ISSET (FTS_NOATIME) ? O_NOATIME : 0)), \
15528
8203b056cc79 maint: fts: give __opendir2 a new parameter and rename
Jim Meyering <meyering@redhat.com>
parents: 15527
diff changeset
1258 Pdir_fd)
15525
792927a7e09d maint: fts.c: move __opendir2 #define "up" out of function body
Jim Meyering <meyering@redhat.com>
parents: 15524
diff changeset
1259
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1260 /*
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1261 * This is the tricky part -- do not casually change *anything* in here. The
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1262 * idea is to build the linked list of entries that are used by fts_children
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1263 * and fts_read. There are lots of special cases.
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1264 *
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1265 * The real slowdown in walking the tree is the stat calls. If FTS_NOSTAT is
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1266 * set and it's a physical walk (so that symbolic links can't be directories),
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1267 * we can do things quickly. First, if it's a 4.4BSD file system, the type
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1268 * of the file is in the directory entry. Otherwise, we assume that the number
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1269 * of subdirectories in a node is equal to the number of links to the parent.
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1270 * The former skips all stat calls. The latter skips stat calls in any leaf
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1271 * directories and for any files after the subdirectories in the directory have
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1272 * been found, cutting the stat calls by about 2/3.
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1273 */
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1274 static FTSENT *
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1275 internal_function
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1276 fts_build (register FTS *sp, int type)
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1277 {
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1278 register FTSENT *p, *head;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1279 register size_t nitems;
15529
894e5e6ae541 fts: add/use new struct member, fts_dirp
Jim Meyering <meyering@redhat.com>
parents: 15528
diff changeset
1280 FTSENT *tail;
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1281 void *oldaddr;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1282 int saved_errno;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1283 bool descend;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1284 bool doadjust;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1285 ptrdiff_t level;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1286 nlink_t nlinks;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1287 bool nostat;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1288 size_t len, maxlen, new_len;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1289 char *cp;
13676
223800d7ac7d fts, getcwd, glob: audit for dirfd returning -1
Paul Eggert <eggert@cs.ucla.edu>
parents: 13674
diff changeset
1290 int dir_fd;
15529
894e5e6ae541 fts: add/use new struct member, fts_dirp
Jim Meyering <meyering@redhat.com>
parents: 15528
diff changeset
1291 FTSENT *cur = sp->fts_cur;
15531
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
1292 bool continue_readdir = !!cur->fts_dirp;
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1293
15531
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
1294 /* When cur->fts_dirp is non-NULL, that means we should
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
1295 continue calling readdir on that existing DIR* pointer
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
1296 rather than opening a new one. */
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
1297 if (continue_readdir)
15526
95cf436ab3b8 maint: fts.c: correct off-by-one indentation
Jim Meyering <meyering@redhat.com>
parents: 15525
diff changeset
1298 {
15531
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
1299 DIR *dp = cur->fts_dirp;
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
1300 dir_fd = dirfd (dp);
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
1301 if (dir_fd < 0)
15526
95cf436ab3b8 maint: fts.c: correct off-by-one indentation
Jim Meyering <meyering@redhat.com>
parents: 15525
diff changeset
1302 {
15531
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
1303 closedir_and_clear (cur->fts_dirp);
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
1304 if (type == BREAD)
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
1305 {
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
1306 cur->fts_info = FTS_DNR;
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
1307 cur->fts_errno = errno;
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
1308 }
15526
95cf436ab3b8 maint: fts.c: correct off-by-one indentation
Jim Meyering <meyering@redhat.com>
parents: 15525
diff changeset
1309 return NULL;
95cf436ab3b8 maint: fts.c: correct off-by-one indentation
Jim Meyering <meyering@redhat.com>
parents: 15525
diff changeset
1310 }
95cf436ab3b8 maint: fts.c: correct off-by-one indentation
Jim Meyering <meyering@redhat.com>
parents: 15525
diff changeset
1311 }
15531
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
1312 else
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
1313 {
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
1314 /* Open the directory for reading. If this fails, we're done.
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
1315 If being called from fts_read, set the fts_info field. */
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
1316 if ((cur->fts_dirp = fts_opendir(cur->fts_accpath, &dir_fd)) == NULL)
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
1317 {
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
1318 if (type == BREAD)
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
1319 {
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
1320 cur->fts_info = FTS_DNR;
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
1321 cur->fts_errno = errno;
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
1322 }
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
1323 return NULL;
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
1324 }
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
1325 /* Rather than calling fts_stat for each and every entry encountered
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
1326 in the readdir loop (below), stat each directory only right after
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
1327 opening it. */
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
1328 if (cur->fts_info == FTS_NSOK)
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
1329 cur->fts_info = fts_stat(sp, cur, false);
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
1330 else if (sp->fts_options & FTS_TIGHT_CYCLE_CHECK)
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
1331 {
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
1332 /* Now read the stat info again after opening a directory to
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
1333 reveal eventual changes caused by a submount triggered by
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
1334 the traversal. But do it only for utilities which use
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
1335 FTS_TIGHT_CYCLE_CHECK. Therefore, only find and du
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
1336 benefit/suffer from this feature for now. */
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
1337 LEAVE_DIR (sp, cur, "4");
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
1338 fts_stat (sp, cur, false);
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
1339 if (! enter_dir (sp, cur))
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
1340 {
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
1341 __set_errno (ENOMEM);
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
1342 return NULL;
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
1343 }
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
1344 }
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
1345 }
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1346
15531
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
1347 /* Maximum number of readdir entries to read at one time. This
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
1348 limitation is to avoid reading millions of entries into memory
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
1349 at once. When an fts_compar function is specified, we have no
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
1350 choice: we must read all entries into memory before calling that
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
1351 function. But when no such function is specified, we can read
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
1352 entries in batches that are large enough to help us with inode-
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
1353 sorting, yet not so large that we risk exhausting memory. */
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
1354 size_t max_entries = (sp->fts_compar == NULL
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
1355 ? FTS_MAX_READDIR_ENTRIES : SIZE_MAX);
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
1356
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
1357 /*
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
1358 * Nlinks is the number of possible entries of type directory in the
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
1359 * directory if we're cheating on stat calls, 0 if we're not doing
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
1360 * any stat calls at all, (nlink_t) -1 if we're statting everything.
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
1361 */
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1362 if (type == BNAMES) {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1363 nlinks = 0;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1364 /* Be quiet about nostat, GCC. */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1365 nostat = false;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1366 } else if (ISSET(FTS_NOSTAT) && ISSET(FTS_PHYSICAL)) {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1367 nlinks = (cur->fts_statp->st_nlink
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1368 - (ISSET(FTS_SEEDOT) ? 0 : 2));
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1369 nostat = true;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1370 } else {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1371 nlinks = -1;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1372 nostat = false;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1373 }
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1374
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1375 /*
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1376 * If we're going to need to stat anything or we want to descend
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1377 * and stay in the directory, chdir. If this fails we keep going,
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1378 * but set a flag so we don't chdir after the post-order visit.
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1379 * We won't be able to stat anything, but we can still return the
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1380 * names themselves. Note, that since fts_read won't be able to
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1381 * chdir into the directory, it will have to return different file
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1382 * names than before, i.e. "a/b" instead of "b". Since the node
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1383 * has already been visited in pre-order, have to wait until the
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1384 * post-order visit to return the error. There is a special case
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1385 * here, if there was nothing to stat then it's not an error to
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1386 * not be able to stat. This is all fairly nasty. If a program
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1387 * needed sorted entries or stat information, they had better be
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1388 * checking FTS_NS on the returned nodes.
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1389 */
15531
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
1390 if (continue_readdir)
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
1391 {
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
1392 /* When resuming a short readdir run, we already have
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
1393 the required dirp and dir_fd. */
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
1394 descend = true;
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
1395 }
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
1396 else if (nlinks || type == BREAD) {
13676
223800d7ac7d fts, getcwd, glob: audit for dirfd returning -1
Paul Eggert <eggert@cs.ucla.edu>
parents: 13674
diff changeset
1397 if (ISSET(FTS_CWDFD))
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1398 {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1399 dir_fd = dup (dir_fd);
13671
228e72ae2254 fts: don't operate on an invalid file descriptor after failed dup
Jim Meyering <meyering@redhat.com>
parents: 13616
diff changeset
1400 if (0 <= dir_fd)
228e72ae2254 fts: don't operate on an invalid file descriptor after failed dup
Jim Meyering <meyering@redhat.com>
parents: 13616
diff changeset
1401 set_cloexec_flag (dir_fd, true);
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1402 }
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1403 if (dir_fd < 0 || fts_safe_changedir(sp, cur, dir_fd, NULL)) {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1404 if (nlinks && type == BREAD)
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1405 cur->fts_errno = errno;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1406 cur->fts_flags |= FTS_DONTCHDIR;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1407 descend = false;
15529
894e5e6ae541 fts: add/use new struct member, fts_dirp
Jim Meyering <meyering@redhat.com>
parents: 15528
diff changeset
1408 closedir_and_clear(cur->fts_dirp);
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1409 if (ISSET(FTS_CWDFD) && 0 <= dir_fd)
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1410 close (dir_fd);
15529
894e5e6ae541 fts: add/use new struct member, fts_dirp
Jim Meyering <meyering@redhat.com>
parents: 15528
diff changeset
1411 cur->fts_dirp = NULL;
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1412 } else
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1413 descend = true;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1414 } else
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1415 descend = false;
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1416
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1417 /*
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1418 * Figure out the max file name length that can be stored in the
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1419 * current buffer -- the inner loop allocates more space as necessary.
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1420 * We really wouldn't have to do the maxlen calculations here, we
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1421 * could do them in fts_read before returning the name, but it's a
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1422 * lot easier here since the length is part of the dirent structure.
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1423 *
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1424 * If not changing directories set a pointer so that can just append
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1425 * each new component into the file name.
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1426 */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1427 len = NAPPEND(cur);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1428 if (ISSET(FTS_NOCHDIR)) {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1429 cp = sp->fts_path + len;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1430 *cp++ = '/';
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1431 } else {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1432 /* GCC, you're too verbose. */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1433 cp = NULL;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1434 }
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1435 len++;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1436 maxlen = sp->fts_pathlen - len;
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1437
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1438 level = cur->fts_level + 1;
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1439
16235
18a38c9615f0 In commentary, do not use ` to quote.
Paul Eggert <eggert@cs.ucla.edu>
parents: 16201
diff changeset
1440 /* Read the directory, attaching each entry to the "link" pointer. */
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1441 doadjust = false;
15530
ddc76c261e25 maint: fts: move decl of `dp' down into while loop; split a long line
Jim Meyering <meyering@redhat.com>
parents: 15529
diff changeset
1442 head = NULL;
ddc76c261e25 maint: fts: move decl of `dp' down into while loop; split a long line
Jim Meyering <meyering@redhat.com>
parents: 15529
diff changeset
1443 tail = NULL;
ddc76c261e25 maint: fts: move decl of `dp' down into while loop; split a long line
Jim Meyering <meyering@redhat.com>
parents: 15529
diff changeset
1444 nitems = 0;
ddc76c261e25 maint: fts: move decl of `dp' down into while loop; split a long line
Jim Meyering <meyering@redhat.com>
parents: 15529
diff changeset
1445 while (cur->fts_dirp) {
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1446 bool is_dir;
15530
ddc76c261e25 maint: fts: move decl of `dp' down into while loop; split a long line
Jim Meyering <meyering@redhat.com>
parents: 15529
diff changeset
1447 struct dirent *dp = readdir(cur->fts_dirp);
ddc76c261e25 maint: fts: move decl of `dp' down into while loop; split a long line
Jim Meyering <meyering@redhat.com>
parents: 15529
diff changeset
1448 if (dp == NULL)
ddc76c261e25 maint: fts: move decl of `dp' down into while loop; split a long line
Jim Meyering <meyering@redhat.com>
parents: 15529
diff changeset
1449 break;
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1450 if (!ISSET(FTS_SEEDOT) && ISDOT(dp->d_name))
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1451 continue;
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1452
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1453 if ((p = fts_alloc (sp, dp->d_name,
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1454 _D_EXACT_NAMLEN (dp))) == NULL)
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1455 goto mem1;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1456 if (_D_EXACT_NAMLEN (dp) >= maxlen) {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1457 /* include space for NUL */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1458 oldaddr = sp->fts_path;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1459 if (! fts_palloc(sp, _D_EXACT_NAMLEN (dp) + len + 1)) {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1460 /*
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1461 * No more memory. Save
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1462 * errno, free up the current structure and the
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1463 * structures already allocated.
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1464 */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1465 mem1: saved_errno = errno;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1466 free(p);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1467 fts_lfree(head);
15529
894e5e6ae541 fts: add/use new struct member, fts_dirp
Jim Meyering <meyering@redhat.com>
parents: 15528
diff changeset
1468 closedir_and_clear(cur->fts_dirp);
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1469 cur->fts_info = FTS_ERR;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1470 SET(FTS_STOP);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1471 __set_errno (saved_errno);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1472 return (NULL);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1473 }
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1474 /* Did realloc() change the pointer? */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1475 if (oldaddr != sp->fts_path) {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1476 doadjust = true;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1477 if (ISSET(FTS_NOCHDIR))
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1478 cp = sp->fts_path + len;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1479 }
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1480 maxlen = sp->fts_pathlen - len;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1481 }
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1482
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1483 new_len = len + _D_EXACT_NAMLEN (dp);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1484 if (new_len < len) {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1485 /*
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1486 * In the unlikely event that we would end up
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1487 * with a file name longer than SIZE_MAX, free up
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1488 * the current structure and the structures already
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1489 * allocated, then error out with ENAMETOOLONG.
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1490 */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1491 free(p);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1492 fts_lfree(head);
15529
894e5e6ae541 fts: add/use new struct member, fts_dirp
Jim Meyering <meyering@redhat.com>
parents: 15528
diff changeset
1493 closedir_and_clear(cur->fts_dirp);
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1494 cur->fts_info = FTS_ERR;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1495 SET(FTS_STOP);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1496 __set_errno (ENAMETOOLONG);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1497 return (NULL);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1498 }
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1499 p->fts_level = level;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1500 p->fts_parent = sp->fts_cur;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1501 p->fts_pathlen = new_len;
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1502
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1503 /* Store dirent.d_ino, in case we need to sort
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1504 entries before processing them. */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1505 p->fts_statp->st_ino = D_INO (dp);
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1506
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1507 /* Build a file name for fts_stat to stat. */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1508 if (ISSET(FTS_NOCHDIR)) {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1509 p->fts_accpath = p->fts_path;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1510 memmove(cp, p->fts_name, p->fts_namelen + 1);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1511 } else
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1512 p->fts_accpath = p->fts_name;
7482
26914593f079 Big performance improvement for fts-based tools that use FTS_NOSTAT.
Jim Meyering <jim@meyering.net>
parents: 7408
diff changeset
1513
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1514 if (sp->fts_compar == NULL || ISSET(FTS_DEFER_STAT)) {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1515 /* Record what fts_read will have to do with this
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1516 entry. In many cases, it will simply fts_stat it,
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1517 but we can take advantage of any d_type information
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1518 to optimize away the unnecessary stat calls. I.e.,
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1519 if FTS_NOSTAT is in effect and we're not following
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1520 symlinks (FTS_PHYSICAL) and d_type indicates this
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1521 is *not* a directory, then we won't have to stat it
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1522 at all. If it *is* a directory, then (currently)
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1523 we stat it regardless, in order to get device and
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1524 inode numbers. Some day we might optimize that
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1525 away, too, for directories where d_ino is known to
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1526 be valid. */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1527 bool skip_stat = (ISSET(FTS_PHYSICAL)
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1528 && ISSET(FTS_NOSTAT)
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1529 && DT_IS_KNOWN(dp)
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1530 && ! DT_MUST_BE(dp, DT_DIR));
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1531 p->fts_info = FTS_NSOK;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1532 /* Propagate dirent.d_type information back
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1533 to caller, when possible. */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1534 set_stat_type (p->fts_statp, D_TYPE (dp));
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1535 fts_set_stat_required(p, !skip_stat);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1536 is_dir = (ISSET(FTS_PHYSICAL)
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1537 && DT_MUST_BE(dp, DT_DIR));
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1538 } else {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1539 p->fts_info = fts_stat(sp, p, false);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1540 is_dir = (p->fts_info == FTS_D
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1541 || p->fts_info == FTS_DC
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1542 || p->fts_info == FTS_DOT);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1543 }
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1544
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1545 /* Decrement link count if applicable. */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1546 if (nlinks > 0 && is_dir)
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1547 nlinks -= nostat;
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1548
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1549 /* We walk in directory order so "ls -f" doesn't get upset. */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1550 p->fts_link = NULL;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1551 if (head == NULL)
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1552 head = tail = p;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1553 else {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1554 tail->fts_link = p;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1555 tail = p;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1556 }
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1557 ++nitems;
15531
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
1558 if (max_entries <= nitems) {
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
1559 /* When there are too many dir entries, leave
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
1560 fts_dirp open, so that a subsequent fts_read
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
1561 can take up where we leave off. */
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
1562 goto break_without_closedir;
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
1563 }
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1564 }
15531
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
1565
15529
894e5e6ae541 fts: add/use new struct member, fts_dirp
Jim Meyering <meyering@redhat.com>
parents: 15528
diff changeset
1566 if (cur->fts_dirp)
894e5e6ae541 fts: add/use new struct member, fts_dirp
Jim Meyering <meyering@redhat.com>
parents: 15528
diff changeset
1567 closedir_and_clear(cur->fts_dirp);
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1568
15531
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
1569 break_without_closedir:
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
1570
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1571 /*
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1572 * If realloc() changed the address of the file name, adjust the
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1573 * addresses for the rest of the tree and the dir list.
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1574 */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1575 if (doadjust)
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1576 fts_padjust(sp, head);
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1577
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1578 /*
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1579 * If not changing directories, reset the file name back to original
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1580 * state.
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1581 */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1582 if (ISSET(FTS_NOCHDIR)) {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1583 if (len == sp->fts_pathlen || nitems == 0)
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1584 --cp;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1585 *cp = '\0';
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1586 }
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1587
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1588 /*
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1589 * If descended after called from fts_children or after called from
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1590 * fts_read and nothing found, get back. At the root level we use
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1591 * the saved fd; if one of fts_open()'s arguments is a relative name
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1592 * to an empty directory, we wind up here with no other way back. If
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1593 * can't get back, we're done.
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1594 */
15531
65fb6cc5f301 fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents: 15530
diff changeset
1595 if (!continue_readdir && descend && (type == BCHILD || !nitems) &&
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1596 (cur->fts_level == FTS_ROOTLEVEL
15988
cd7ac59d8eb5 fts: close parent dir FD before returning from post-traversal fts_read
Jim Meyering <meyering@redhat.com>
parents: 15531
diff changeset
1597 ? restore_initial_cwd(sp)
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1598 : fts_safe_changedir(sp, cur->fts_parent, -1, ".."))) {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1599 cur->fts_info = FTS_ERR;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1600 SET(FTS_STOP);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1601 fts_lfree(head);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1602 return (NULL);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1603 }
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1604
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1605 /* If didn't find anything, return NULL. */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1606 if (!nitems) {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1607 if (type == BREAD)
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1608 cur->fts_info = FTS_DP;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1609 fts_lfree(head);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1610 return (NULL);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1611 }
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1612
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1613 /* If there are many entries, no sorting function has been specified,
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1614 and this file system is of a type that may be slow with a large
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1615 number of entries, then sort the directory entries on increasing
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1616 inode numbers. */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1617 if (nitems > _FTS_INODE_SORT_DIR_ENTRIES_THRESHOLD
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1618 && !sp->fts_compar
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1619 && ISSET (FTS_CWDFD)
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1620 && dirent_inode_sort_may_be_useful (sp->fts_cwd_fd)) {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1621 sp->fts_compar = fts_compare_ino;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1622 head = fts_sort (sp, head, nitems);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1623 sp->fts_compar = NULL;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1624 }
10481
47fe4e48e158 fts: sort dirent entries on inode number before traversing
Jim Meyering <meyering@redhat.com>
parents: 9718
diff changeset
1625
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1626 /* Sort the entries. */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1627 if (sp->fts_compar && nitems > 1)
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1628 head = fts_sort(sp, head, nitems);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1629 return (head);
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1630 }
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1631
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1632 #if FTS_DEBUG
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1633
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1634 /* Walk ->fts_parent links starting at E_CURR, until the root of the
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1635 current hierarchy. There should be a directory with dev/inode
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1636 matching those of AD. If not, print a lot of diagnostics. */
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1637 static void
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1638 find_matching_ancestor (FTSENT const *e_curr, struct Active_dir const *ad)
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1639 {
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1640 FTSENT const *ent;
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1641 for (ent = e_curr; ent->fts_level >= FTS_ROOTLEVEL; ent = ent->fts_parent)
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1642 {
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1643 if (ad->ino == ent->fts_statp->st_ino
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1644 && ad->dev == ent->fts_statp->st_dev)
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1645 return;
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1646 }
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1647 printf ("ERROR: tree dir, %s, not active\n", ad->fts_ent->fts_accpath);
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1648 printf ("active dirs:\n");
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1649 for (ent = e_curr;
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1650 ent->fts_level >= FTS_ROOTLEVEL; ent = ent->fts_parent)
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1651 printf (" %s(%"PRIuMAX"/%"PRIuMAX") to %s(%"PRIuMAX"/%"PRIuMAX")...\n",
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1652 ad->fts_ent->fts_accpath,
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1653 (uintmax_t) ad->dev,
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1654 (uintmax_t) ad->ino,
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1655 ent->fts_accpath,
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1656 (uintmax_t) ent->fts_statp->st_dev,
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1657 (uintmax_t) ent->fts_statp->st_ino);
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1658 }
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1659
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1660 void
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1661 fts_cross_check (FTS const *sp)
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1662 {
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1663 FTSENT const *ent = sp->fts_cur;
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1664 FTSENT const *t;
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1665 if ( ! ISSET (FTS_TIGHT_CYCLE_CHECK))
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1666 return;
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1667
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1668 Dprintf (("fts-cross-check cur=%s\n", ent->fts_path));
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1669 /* Make sure every parent dir is in the tree. */
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1670 for (t = ent->fts_parent; t->fts_level >= FTS_ROOTLEVEL; t = t->fts_parent)
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1671 {
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1672 struct Active_dir ad;
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1673 ad.ino = t->fts_statp->st_ino;
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1674 ad.dev = t->fts_statp->st_dev;
6034
96149b1bbb32 (fts_cross_check) [FTS_DEBUG]: s/active_dir_ht/fts_cycle.ht/.
Jim Meyering <jim@meyering.net>
parents: 5907
diff changeset
1675 if ( ! hash_lookup (sp->fts_cycle.ht, &ad))
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1676 printf ("ERROR: active dir, %s, not in tree\n", t->fts_path);
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1677 }
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1678
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1679 /* Make sure every dir in the tree is an active dir.
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1680 But ENT is not necessarily a directory. If so, just skip this part. */
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1681 if (ent->fts_parent->fts_level >= FTS_ROOTLEVEL
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1682 && (ent->fts_info == FTS_DP
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1683 || ent->fts_info == FTS_D))
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1684 {
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1685 struct Active_dir *ad;
6034
96149b1bbb32 (fts_cross_check) [FTS_DEBUG]: s/active_dir_ht/fts_cycle.ht/.
Jim Meyering <jim@meyering.net>
parents: 5907
diff changeset
1686 for (ad = hash_get_first (sp->fts_cycle.ht); ad != NULL;
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1687 ad = hash_get_next (sp->fts_cycle.ht, ad))
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1688 {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1689 find_matching_ancestor (ent, ad);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1690 }
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1691 }
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1692 }
7639
1670d42131d7 Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents: 7635
diff changeset
1693
1670d42131d7 Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents: 7635
diff changeset
1694 static bool
1670d42131d7 Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents: 7635
diff changeset
1695 same_fd (int fd1, int fd2)
1670d42131d7 Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents: 7635
diff changeset
1696 {
1670d42131d7 Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents: 7635
diff changeset
1697 struct stat sb1, sb2;
1670d42131d7 Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents: 7635
diff changeset
1698 return (fstat (fd1, &sb1) == 0
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1699 && fstat (fd2, &sb2) == 0
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1700 && SAME_INODE (sb1, sb2));
7639
1670d42131d7 Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents: 7635
diff changeset
1701 }
1670d42131d7 Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents: 7635
diff changeset
1702
1670d42131d7 Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents: 7635
diff changeset
1703 static void
1670d42131d7 Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents: 7635
diff changeset
1704 fd_ring_print (FTS const *sp, FILE *stream, char const *msg)
1670d42131d7 Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents: 7635
diff changeset
1705 {
1670d42131d7 Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents: 7635
diff changeset
1706 I_ring const *fd_ring = &sp->fts_fd_ring;
1670d42131d7 Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents: 7635
diff changeset
1707 unsigned int i = fd_ring->fts_front;
1670d42131d7 Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents: 7635
diff changeset
1708 char *cwd = getcwdat (sp->fts_cwd_fd, NULL, 0);
1670d42131d7 Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents: 7635
diff changeset
1709 fprintf (stream, "=== %s ========== %s\n", msg, cwd);
1670d42131d7 Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents: 7635
diff changeset
1710 free (cwd);
1670d42131d7 Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents: 7635
diff changeset
1711 if (i_ring_empty (fd_ring))
1670d42131d7 Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents: 7635
diff changeset
1712 return;
1670d42131d7 Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents: 7635
diff changeset
1713
1670d42131d7 Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents: 7635
diff changeset
1714 while (true)
1670d42131d7 Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents: 7635
diff changeset
1715 {
1670d42131d7 Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents: 7635
diff changeset
1716 int fd = fd_ring->fts_fd_ring[i];
1670d42131d7 Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents: 7635
diff changeset
1717 if (fd < 0)
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1718 fprintf (stream, "%d: %d:\n", i, fd);
7639
1670d42131d7 Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents: 7635
diff changeset
1719 else
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1720 {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1721 char *wd = getcwdat (fd, NULL, 0);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1722 fprintf (stream, "%d: %d: %s\n", i, fd, wd);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1723 free (wd);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1724 }
7639
1670d42131d7 Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents: 7635
diff changeset
1725 if (i == fd_ring->fts_back)
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1726 break;
7639
1670d42131d7 Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents: 7635
diff changeset
1727 i = (i + I_RING_SIZE - 1) % I_RING_SIZE;
1670d42131d7 Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents: 7635
diff changeset
1728 }
1670d42131d7 Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents: 7635
diff changeset
1729 }
1670d42131d7 Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents: 7635
diff changeset
1730
1670d42131d7 Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents: 7635
diff changeset
1731 /* Ensure that each file descriptor on the fd_ring matches a
1670d42131d7 Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents: 7635
diff changeset
1732 parent, grandparent, etc. of the current working directory. */
1670d42131d7 Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents: 7635
diff changeset
1733 static void
1670d42131d7 Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents: 7635
diff changeset
1734 fd_ring_check (FTS const *sp)
1670d42131d7 Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents: 7635
diff changeset
1735 {
1670d42131d7 Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents: 7635
diff changeset
1736 if (!fts_debug)
1670d42131d7 Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents: 7635
diff changeset
1737 return;
1670d42131d7 Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents: 7635
diff changeset
1738
1670d42131d7 Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents: 7635
diff changeset
1739 /* Make a writable copy. */
1670d42131d7 Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents: 7635
diff changeset
1740 I_ring fd_w = sp->fts_fd_ring;
1670d42131d7 Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents: 7635
diff changeset
1741
1670d42131d7 Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents: 7635
diff changeset
1742 int cwd_fd = sp->fts_cwd_fd;
1670d42131d7 Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents: 7635
diff changeset
1743 cwd_fd = dup (cwd_fd);
1670d42131d7 Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents: 7635
diff changeset
1744 char *dot = getcwdat (cwd_fd, NULL, 0);
1670d42131d7 Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents: 7635
diff changeset
1745 error (0, 0, "===== check ===== cwd: %s", dot);
1670d42131d7 Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents: 7635
diff changeset
1746 free (dot);
1670d42131d7 Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents: 7635
diff changeset
1747 while ( ! i_ring_empty (&fd_w))
1670d42131d7 Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents: 7635
diff changeset
1748 {
1670d42131d7 Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents: 7635
diff changeset
1749 int fd = i_ring_pop (&fd_w);
1670d42131d7 Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents: 7635
diff changeset
1750 if (0 <= fd)
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1751 {
15374
04a9f678e342 fts: introduce FTS_NOATIME
Eric Blake <eblake@redhat.com>
parents: 14774
diff changeset
1752 int parent_fd = openat (cwd_fd, "..", O_SEARCH | O_NOATIME);
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1753 if (parent_fd < 0)
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1754 {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1755 // Warn?
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1756 break;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1757 }
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1758 if (!same_fd (fd, parent_fd))
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1759 {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1760 char *cwd = getcwdat (fd, NULL, 0);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1761 error (0, errno, "ring : %s", cwd);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1762 char *c2 = getcwdat (parent_fd, NULL, 0);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1763 error (0, errno, "parent: %s", c2);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1764 free (cwd);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1765 free (c2);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1766 fts_assert (0);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1767 }
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1768 close (cwd_fd);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1769 cwd_fd = parent_fd;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1770 }
7639
1670d42131d7 Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents: 7635
diff changeset
1771 }
1670d42131d7 Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents: 7635
diff changeset
1772 close (cwd_fd);
1670d42131d7 Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents: 7635
diff changeset
1773 }
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1774 #endif
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1775
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1776 static unsigned short int
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1777 internal_function
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1778 fts_stat(FTS *sp, register FTSENT *p, bool follow)
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1779 {
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1780 struct stat *sbp = p->fts_statp;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1781 int saved_errno;
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1782
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1783 if (p->fts_level == FTS_ROOTLEVEL && ISSET(FTS_COMFOLLOW))
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1784 follow = true;
7482
26914593f079 Big performance improvement for fts-based tools that use FTS_NOSTAT.
Jim Meyering <jim@meyering.net>
parents: 7408
diff changeset
1785
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1786 /*
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1787 * If doing a logical walk, or application requested FTS_FOLLOW, do
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1788 * a stat(2). If that fails, check for a non-existent symlink. If
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1789 * fail, set the errno from the stat call.
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1790 */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1791 if (ISSET(FTS_LOGICAL) || follow) {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1792 if (stat(p->fts_accpath, sbp)) {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1793 saved_errno = errno;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1794 if (errno == ENOENT
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1795 && lstat(p->fts_accpath, sbp) == 0) {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1796 __set_errno (0);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1797 return (FTS_SLNONE);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1798 }
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1799 p->fts_errno = saved_errno;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1800 goto err;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1801 }
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1802 } else if (fstatat(sp->fts_cwd_fd, p->fts_accpath, sbp,
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1803 AT_SYMLINK_NOFOLLOW)) {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1804 p->fts_errno = errno;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1805 err: memset(sbp, 0, sizeof(struct stat));
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1806 return (FTS_NS);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1807 }
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1808
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1809 if (S_ISDIR(sbp->st_mode)) {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1810 p->fts_n_dirs_remaining = (sbp->st_nlink
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1811 - (ISSET(FTS_SEEDOT) ? 0 : 2));
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1812 if (ISDOT(p->fts_name)) {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1813 /* Command-line "." and ".." are real directories. */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1814 return (p->fts_level == FTS_ROOTLEVEL ? FTS_D : FTS_DOT);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1815 }
5872
fab6701e5cb2 New fts module.
Paul Eggert <eggert@cs.ucla.edu>
parents: 5867
diff changeset
1816
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1817 return (FTS_D);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1818 }
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1819 if (S_ISLNK(sbp->st_mode))
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1820 return (FTS_SL);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1821 if (S_ISREG(sbp->st_mode))
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1822 return (FTS_F);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1823 return (FTS_DEFAULT);
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1824 }
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1825
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1826 static int
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1827 fts_compar (void const *a, void const *b)
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1828 {
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1829 /* Convert A and B to the correct types, to pacify the compiler, and
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1830 for portability to bizarre hosts where "void const *" and "FTSENT
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1831 const **" differ in runtime representation. The comparison
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1832 function cannot modify *a and *b, but there is no compile-time
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1833 check for this. */
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1834 FTSENT const **pa = (FTSENT const **) a;
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1835 FTSENT const **pb = (FTSENT const **) b;
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1836 return pa[0]->fts_fts->fts_compar (pa, pb);
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1837 }
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1838
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1839 static FTSENT *
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1840 internal_function
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1841 fts_sort (FTS *sp, FTSENT *head, register size_t nitems)
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1842 {
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1843 register FTSENT **ap, *p;
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1844
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1845 /* On most modern hosts, void * and FTSENT ** have the same
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1846 run-time representation, and one can convert sp->fts_compar to
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1847 the type qsort expects without problem. Use the heuristic that
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1848 this is OK if the two pointer types are the same size, and if
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1849 converting FTSENT ** to long int is the same as converting
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1850 FTSENT ** to void * and then to long int. This heuristic isn't
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1851 valid in general but we don't know of any counterexamples. */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1852 FTSENT *dummy;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1853 int (*compare) (void const *, void const *) =
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1854 ((sizeof &dummy == sizeof (void *)
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1855 && (long int) &dummy == (long int) (void *) &dummy)
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1856 ? (int (*) (void const *, void const *)) sp->fts_compar
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1857 : fts_compar);
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1858
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1859 /*
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1860 * Construct an array of pointers to the structures and call qsort(3).
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1861 * Reassemble the array in the order returned by qsort. If unable to
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1862 * sort for memory reasons, return the directory entries in their
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1863 * current order. Allocate enough space for the current needs plus
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1864 * 40 so don't realloc one entry at a time.
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1865 */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1866 if (nitems > sp->fts_nitems) {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1867 FTSENT **a;
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1868
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1869 sp->fts_nitems = nitems + 40;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1870 if (SIZE_MAX / sizeof *a < sp->fts_nitems
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1871 || ! (a = realloc (sp->fts_array,
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1872 sp->fts_nitems * sizeof *a))) {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1873 free(sp->fts_array);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1874 sp->fts_array = NULL;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1875 sp->fts_nitems = 0;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1876 return (head);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1877 }
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1878 sp->fts_array = a;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1879 }
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1880 for (ap = sp->fts_array, p = head; p; p = p->fts_link)
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1881 *ap++ = p;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1882 qsort((void *)sp->fts_array, nitems, sizeof(FTSENT *), compare);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1883 for (head = *(ap = sp->fts_array); --nitems; ++ap)
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1884 ap[0]->fts_link = ap[1];
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1885 ap[0]->fts_link = NULL;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1886 return (head);
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1887 }
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1888
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1889 static FTSENT *
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1890 internal_function
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1891 fts_alloc (FTS *sp, const char *name, register size_t namelen)
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1892 {
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1893 register FTSENT *p;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1894 size_t len;
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1895
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1896 /*
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1897 * The file name is a variable length array. Allocate the FTSENT
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1898 * structure and the file name in one chunk.
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1899 */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1900 len = sizeof(FTSENT) + namelen;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1901 if ((p = malloc(len)) == NULL)
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1902 return (NULL);
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1903
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1904 /* Copy the name and guarantee NUL termination. */
17073
60627a1a95ff fts: when there is no risk of overlap, use memcpy, not memmove
Jim Meyering <meyering@redhat.com>
parents: 16358
diff changeset
1905 memcpy(p->fts_name, name, namelen);
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1906 p->fts_name[namelen] = '\0';
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1907
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1908 p->fts_namelen = namelen;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1909 p->fts_fts = sp;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1910 p->fts_path = sp->fts_path;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1911 p->fts_errno = 0;
15529
894e5e6ae541 fts: add/use new struct member, fts_dirp
Jim Meyering <meyering@redhat.com>
parents: 15528
diff changeset
1912 p->fts_dirp = NULL;
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1913 p->fts_flags = 0;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1914 p->fts_instr = FTS_NOINSTR;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1915 p->fts_number = 0;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1916 p->fts_pointer = NULL;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1917 return (p);
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1918 }
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1919
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1920 static void
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1921 internal_function
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1922 fts_lfree (register FTSENT *head)
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1923 {
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1924 register FTSENT *p;
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1925
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1926 /* Free a linked list of structures. */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1927 while ((p = head)) {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1928 head = head->fts_link;
15529
894e5e6ae541 fts: add/use new struct member, fts_dirp
Jim Meyering <meyering@redhat.com>
parents: 15528
diff changeset
1929 if (p->fts_dirp)
894e5e6ae541 fts: add/use new struct member, fts_dirp
Jim Meyering <meyering@redhat.com>
parents: 15528
diff changeset
1930 closedir (p->fts_dirp);
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1931 free(p);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1932 }
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1933 }
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1934
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1935 /*
5907
c47674a83a78 Sync from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 5894
diff changeset
1936 * Allow essentially unlimited file name lengths; find, rm, ls should
c47674a83a78 Sync from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 5894
diff changeset
1937 * all work on any tree. Most systems will allow creation of file
c47674a83a78 Sync from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 5894
diff changeset
1938 * names much longer than MAXPATHLEN, even though the kernel won't
c47674a83a78 Sync from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 5894
diff changeset
1939 * resolve them. Add the size (not just what's needed) plus 256 bytes
c47674a83a78 Sync from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 5894
diff changeset
1940 * so don't realloc the file name 2 bytes at a time.
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1941 */
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1942 static bool
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1943 internal_function
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1944 fts_palloc (FTS *sp, size_t more)
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1945 {
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1946 char *p;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1947 size_t new_len = sp->fts_pathlen + more + 256;
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1948
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1949 /*
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1950 * See if fts_pathlen would overflow.
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1951 */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1952 if (new_len < sp->fts_pathlen) {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1953 free(sp->fts_path);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1954 sp->fts_path = NULL;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1955 __set_errno (ENAMETOOLONG);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1956 return false;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1957 }
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1958 sp->fts_pathlen = new_len;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1959 p = realloc(sp->fts_path, sp->fts_pathlen);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1960 if (p == NULL) {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1961 free(sp->fts_path);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1962 sp->fts_path = NULL;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1963 return false;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1964 }
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1965 sp->fts_path = p;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1966 return true;
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1967 }
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1968
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1969 /*
5907
c47674a83a78 Sync from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 5894
diff changeset
1970 * When the file name is realloc'd, have to fix all of the pointers in
c47674a83a78 Sync from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 5894
diff changeset
1971 * structures already returned.
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1972 */
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1973 static void
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1974 internal_function
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1975 fts_padjust (FTS *sp, FTSENT *head)
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1976 {
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1977 FTSENT *p;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1978 char *addr = sp->fts_path;
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1979
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1980 #define ADJUST(p) do { \
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1981 if ((p)->fts_accpath != (p)->fts_name) { \
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1982 (p)->fts_accpath = \
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1983 (char *)addr + ((p)->fts_accpath - (p)->fts_path); \
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1984 } \
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1985 (p)->fts_path = addr; \
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1986 } while (0)
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1987 /* Adjust the current set of children. */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1988 for (p = sp->fts_child; p; p = p->fts_link)
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1989 ADJUST(p);
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1990
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1991 /* Adjust the rest of the tree, including the current level. */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1992 for (p = head; p->fts_level >= FTS_ROOTLEVEL;) {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1993 ADJUST(p);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1994 p = p->fts_link ? p->fts_link : p->fts_parent;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
1995 }
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1996 }
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1997
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1998 static size_t
16128
6beadb731202 mark functions with const and pure attributes
Jim Meyering <meyering@redhat.com>
parents: 15988
diff changeset
1999 internal_function _GL_ATTRIBUTE_PURE
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2000 fts_maxarglen (char * const *argv)
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2001 {
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
2002 size_t len, max;
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2003
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
2004 for (max = 0; *argv; ++argv)
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
2005 if ((len = strlen(*argv)) > max)
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
2006 max = len;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
2007 return (max + 1);
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2008 }
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2009
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2010 /*
5907
c47674a83a78 Sync from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 5894
diff changeset
2011 * Change to dir specified by fd or file name without getting
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2012 * tricked by someone changing the world out from underneath us.
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2013 * Assumes p->fts_statp->st_dev and p->fts_statp->st_ino are filled in.
7151
43e3888c56c4 Update from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 6949
diff changeset
2014 * If FD is non-negative, expect it to be used after this function returns,
16235
18a38c9615f0 In commentary, do not use ` to quote.
Paul Eggert <eggert@cs.ucla.edu>
parents: 16201
diff changeset
2015 * and to be closed eventually. So don't pass e.g., 'dirfd(dirp)' and then
7151
43e3888c56c4 Update from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 6949
diff changeset
2016 * do closedir(dirp), because that would invalidate the saved FD.
43e3888c56c4 Update from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 6949
diff changeset
2017 * Upon failure, close FD immediately and return nonzero.
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2018 */
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2019 static int
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2020 internal_function
5907
c47674a83a78 Sync from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 5894
diff changeset
2021 fts_safe_changedir (FTS *sp, FTSENT *p, int fd, char const *dir)
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2022 {
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
2023 int ret;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
2024 bool is_dotdot = dir && STREQ (dir, "..");
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
2025 int newfd;
7623
5bfad7d666d6 * lib/fts.c (fts_safe_changedir): Add a comment.
Jim Meyering <jim@meyering.net>
parents: 7621
diff changeset
2026
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
2027 /* This clause handles the unusual case in which FTS_NOCHDIR
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
2028 is specified, along with FTS_CWDFD. In that case, there is
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
2029 no need to change even the virtual cwd file descriptor.
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
2030 However, if FD is non-negative, we do close it here. */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
2031 if (ISSET (FTS_NOCHDIR))
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
2032 {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
2033 if (ISSET (FTS_CWDFD) && 0 <= fd)
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
2034 close (fd);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
2035 return 0;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
2036 }
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2037
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
2038 if (fd < 0 && is_dotdot && ISSET (FTS_CWDFD))
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
2039 {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
2040 /* When possible, skip the diropen and subsequent fstat+dev/ino
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
2041 comparison. I.e., when changing to parent directory
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
2042 (chdir ("..")), use a file descriptor from the ring and
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
2043 save the overhead of diropen+fstat, as well as avoiding
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
2044 failure when we lack "x" access to the virtual cwd. */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
2045 if ( ! i_ring_empty (&sp->fts_fd_ring))
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
2046 {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
2047 int parent_fd;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
2048 fd_ring_print (sp, stderr, "pre-pop");
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
2049 parent_fd = i_ring_pop (&sp->fts_fd_ring);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
2050 is_dotdot = true;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
2051 if (0 <= parent_fd)
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
2052 {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
2053 fd = parent_fd;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
2054 dir = NULL;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
2055 }
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
2056 }
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
2057 }
7639
1670d42131d7 Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents: 7635
diff changeset
2058
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
2059 newfd = fd;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
2060 if (fd < 0 && (newfd = diropen (sp, dir)) < 0)
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
2061 return -1;
7639
1670d42131d7 Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents: 7635
diff changeset
2062
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
2063 /* The following dev/inode check is necessary if we're doing a
16235
18a38c9615f0 In commentary, do not use ` to quote.
Paul Eggert <eggert@cs.ucla.edu>
parents: 16201
diff changeset
2064 "logical" traversal (through symlinks, a la chown -L), if the
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
2065 system lacks O_NOFOLLOW support, or if we're changing to ".."
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
2066 (but not via a popped file descriptor). When changing to the
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
2067 name "..", O_NOFOLLOW can't help. In general, when the target is
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
2068 not "..", diropen's use of O_NOFOLLOW ensures we don't mistakenly
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
2069 follow a symlink, so we can avoid the expense of this fstat. */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
2070 if (ISSET(FTS_LOGICAL) || ! HAVE_WORKING_O_NOFOLLOW
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
2071 || (dir && STREQ (dir, "..")))
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
2072 {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
2073 struct stat sb;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
2074 if (fstat(newfd, &sb))
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
2075 {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
2076 ret = -1;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
2077 goto bail;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
2078 }
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
2079 if (p->fts_statp->st_dev != sb.st_dev
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
2080 || p->fts_statp->st_ino != sb.st_ino)
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
2081 {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
2082 __set_errno (ENOENT); /* disinformation */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
2083 ret = -1;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
2084 goto bail;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
2085 }
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
2086 }
7151
43e3888c56c4 Update from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 6949
diff changeset
2087
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
2088 if (ISSET(FTS_CWDFD))
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
2089 {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
2090 cwd_advance_fd (sp, newfd, ! is_dotdot);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
2091 return 0;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
2092 }
7151
43e3888c56c4 Update from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 6949
diff changeset
2093
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
2094 ret = fchdir(newfd);
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2095 bail:
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
2096 if (fd < 0)
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
2097 {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
2098 int oerrno = errno;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
2099 (void)close(newfd);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
2100 __set_errno (oerrno);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
2101 }
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12378
diff changeset
2102 return ret;
5858
942c4d17dd7d New files, from coreutils.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2103 }