Mercurial > gnulib
annotate lib/fts.c @ 18626:12df2165ec1c
version-etc: new year
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| author | Paul Eggert <eggert@cs.ucla.edu> |
|---|---|
| date | Sun, 01 Jan 2017 02:59:23 +0000 |
| parents | 4434607ac1ce |
| children | 50d1e186bf78 |
| rev | line source |
|---|---|
| 5858 | 1 /* Traverse a file hierarchy. |
| 2 | |
| 18626 | 3 Copyright (C) 2004-2017 Free Software Foundation, Inc. |
| 5858 | 4 |
|
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5 This program is free software: you can redistribute it and/or modify |
| 5858 | 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. |
| 5858 | 9 |
| 10 This program is distributed in the hope that it will be useful, | |
| 11 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 13 GNU General Public License for more details. | |
| 14 | |
| 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/>. */ |
| 5858 | 17 |
| 18 /*- | |
| 19 * Copyright (c) 1990, 1993, 1994 | |
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20 * The Regents of the University of California. All rights reserved. |
| 5858 | 21 * |
| 22 * Redistribution and use in source and binary forms, with or without | |
| 23 * modification, are permitted provided that the following conditions | |
| 24 * are met: | |
| 25 * 1. Redistributions of source code must retain the above copyright | |
| 26 * notice, this list of conditions and the following disclaimer. | |
| 27 * 2. Redistributions in binary form must reproduce the above copyright | |
| 28 * notice, this list of conditions and the following disclaimer in the | |
| 29 * documentation and/or other materials provided with the distribution. | |
| 30 * 4. Neither the name of the University nor the names of its contributors | |
| 31 * may be used to endorse or promote products derived from this software | |
| 32 * without specific prior written permission. | |
| 33 * | |
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34 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS "AS IS" AND |
| 5858 | 35 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 36 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| 37 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
| 38 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
| 39 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
| 40 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
| 41 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
| 42 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
| 43 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
| 44 * SUCH DAMAGE. | |
| 45 */ | |
| 46 | |
|
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47 #include <config.h> |
| 5858 | 48 |
| 18325 | 49 #if defined LIBC_SCCS && !defined GCC_LINT && !defined lint |
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50 static char sccsid[] = "@(#)fts.c 8.6 (Berkeley) 8/14/94"; |
| 18325 | 51 #endif |
| 5858 | 52 |
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53 #include "fts_.h" |
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54 |
| 5858 | 55 #if HAVE_SYS_PARAM_H || defined _LIBC |
| 56 # include <sys/param.h> | |
| 57 #endif | |
| 58 #ifdef _LIBC | |
| 59 # include <include/sys/stat.h> | |
| 60 #else | |
| 61 # include <sys/stat.h> | |
| 62 #endif | |
| 63 #include <fcntl.h> | |
| 64 #include <errno.h> | |
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65 #include <stdalign.h> |
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66 #include <stdbool.h> |
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67 #include <stddef.h> |
| 5858 | 68 #include <stdlib.h> |
| 69 #include <string.h> | |
| 70 #include <unistd.h> | |
| 71 | |
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72 #if ! _LIBC |
| 7151 | 73 # include "fcntl--.h" |
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74 # include "dirent--.h" |
| 7151 | 75 # include "unistd--.h" |
| 11940 | 76 /* FIXME - use fcntl(F_DUPFD_CLOEXEC)/openat(O_CLOEXEC) once they are |
| 77 supported. */ | |
| 78 # include "cloexec.h" | |
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79 # include "flexmember.h" |
| 11946 | 80 # include "openat.h" |
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81 # include "same-inode.h" |
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82 #endif |
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83 |
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84 #include <dirent.h> |
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85 #ifndef _D_EXACT_NAMLEN |
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86 # define _D_EXACT_NAMLEN(dirent) strlen ((dirent)->d_name) |
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87 #endif |
| 5858 | 88 |
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89 #if HAVE_STRUCT_DIRENT_D_TYPE |
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90 /* True if the type of the directory entry D is known. */ |
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91 # define DT_IS_KNOWN(d) ((d)->d_type != DT_UNKNOWN) |
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92 /* True if the type of the directory entry D must be T. */ |
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93 # define DT_MUST_BE(d, t) ((d)->d_type == (t)) |
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94 # define D_TYPE(d) ((d)->d_type) |
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95 #else |
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96 # define DT_IS_KNOWN(d) false |
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97 # define DT_MUST_BE(d, t) false |
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98 # define D_TYPE(d) DT_UNKNOWN |
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99 |
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100 # undef DT_UNKNOWN |
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101 # define DT_UNKNOWN 0 |
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102 |
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103 /* Any nonzero values will do here, so long as they're distinct. |
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104 Undef any existing macros out of the way. */ |
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105 # undef DT_BLK |
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106 # undef DT_CHR |
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107 # undef DT_DIR |
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108 # undef DT_FIFO |
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109 # undef DT_LNK |
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110 # undef DT_REG |
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111 # undef DT_SOCK |
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112 # define DT_BLK 1 |
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113 # define DT_CHR 2 |
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114 # define DT_DIR 3 |
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115 # define DT_FIFO 4 |
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116 # define DT_LNK 5 |
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117 # define DT_REG 6 |
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118 # define DT_SOCK 7 |
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119 #endif |
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120 |
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121 #ifndef S_IFLNK |
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122 # define S_IFLNK 0 |
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123 #endif |
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124 #ifndef S_IFSOCK |
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125 # define S_IFSOCK 0 |
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126 #endif |
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127 |
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128 enum |
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129 { |
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130 NOT_AN_INODE_NUMBER = 0 |
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131 }; |
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132 |
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133 #ifdef D_INO_IN_DIRENT |
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134 # define D_INO(dp) (dp)->d_ino |
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135 #else |
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136 /* Some systems don't have inodes, so fake them to avoid lots of ifdefs. */ |
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137 # define D_INO(dp) NOT_AN_INODE_NUMBER |
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138 #endif |
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139 |
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140 /* If possible (see max_entries, below), read no more than this many directory |
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141 entries at a time. Without this limit (i.e., when using non-NULL |
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142 fts_compar), processing a directory with 4,000,000 entries requires ~1GiB |
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143 of memory, and handling 64M entries would require 16GiB of memory. */ |
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144 #ifndef FTS_MAX_READDIR_ENTRIES |
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145 # define FTS_MAX_READDIR_ENTRIES 100000 |
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146 #endif |
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147 |
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148 /* If there are more than this many entries in a directory, |
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149 and the conditions mentioned below are satisfied, then sort |
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150 the entries on inode number before any further processing. */ |
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151 #ifndef FTS_INODE_SORT_DIR_ENTRIES_THRESHOLD |
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152 # define FTS_INODE_SORT_DIR_ENTRIES_THRESHOLD 10000 |
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153 #endif |
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154 |
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155 enum |
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156 { |
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157 _FTS_INODE_SORT_DIR_ENTRIES_THRESHOLD = FTS_INODE_SORT_DIR_ENTRIES_THRESHOLD |
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158 }; |
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159 |
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160 enum Fts_stat |
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161 { |
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162 FTS_NO_STAT_REQUIRED = 1, |
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163 FTS_STAT_REQUIRED = 2 |
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164 }; |
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165 |
| 5858 | 166 #ifdef _LIBC |
| 167 # undef close | |
| 168 # define close __close | |
| 169 # undef closedir | |
| 170 # define closedir __closedir | |
| 171 # undef fchdir | |
| 172 # define fchdir __fchdir | |
| 173 # undef open | |
| 174 # define open __open | |
| 175 # undef readdir | |
| 176 # define readdir __readdir | |
| 177 #else | |
| 178 # undef internal_function | |
| 179 # define internal_function /* empty */ | |
| 180 #endif | |
| 181 | |
| 182 #ifndef __set_errno | |
| 183 # define __set_errno(Val) errno = (Val) | |
| 184 #endif | |
| 185 | |
| 7151 | 186 /* If this host provides the openat function, then we can avoid |
| 187 attempting to open "." in some initialization code below. */ | |
| 188 #ifdef HAVE_OPENAT | |
| 189 # define HAVE_OPENAT_SUPPORT 1 | |
| 190 #else | |
| 191 # define HAVE_OPENAT_SUPPORT 0 | |
| 192 #endif | |
| 5858 | 193 |
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194 #ifdef NDEBUG |
| 17840 | 195 # define fts_assert(expr) ((void) (0 && (expr))) |
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196 #else |
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197 # define fts_assert(expr) \ |
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198 do \ |
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199 { \ |
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200 if (!(expr)) \ |
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201 abort (); \ |
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202 } \ |
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203 while (false) |
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204 #endif |
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205 |
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206 static FTSENT *fts_alloc (FTS *, const char *, size_t) internal_function; |
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207 static FTSENT *fts_build (FTS *, int) internal_function; |
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208 static void fts_lfree (FTSENT *) internal_function; |
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209 static void fts_load (FTS *, FTSENT *) internal_function; |
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210 static size_t fts_maxarglen (char * const *) internal_function; |
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211 static void fts_padjust (FTS *, FTSENT *) internal_function; |
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212 static bool fts_palloc (FTS *, size_t) internal_function; |
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213 static FTSENT *fts_sort (FTS *, FTSENT *, size_t) internal_function; |
| 5858 | 214 static unsigned short int fts_stat (FTS *, FTSENT *, bool) internal_function; |
| 215 static int fts_safe_changedir (FTS *, FTSENT *, int, const char *) | |
| 216 internal_function; | |
| 217 | |
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218 #include "fts-cycle.c" |
| 5872 | 219 |
| 5858 | 220 #ifndef MAX |
| 221 # define MAX(a,b) ((a) > (b) ? (a) : (b)) | |
| 222 #endif | |
| 223 | |
| 224 #ifndef SIZE_MAX | |
| 225 # define SIZE_MAX ((size_t) -1) | |
| 226 #endif | |
| 227 | |
|
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228 #define ISDOT(a) (a[0] == '.' && (!a[1] || (a[1] == '.' && !a[2]))) |
|
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229 #define STREQ(a, b) (strcmp (a, b) == 0) |
| 5858 | 230 |
|
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231 #define CLR(opt) (sp->fts_options &= ~(opt)) |
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232 #define ISSET(opt) (sp->fts_options & (opt)) |
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233 #define SET(opt) (sp->fts_options |= (opt)) |
| 5858 | 234 |
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235 /* FIXME: FTS_NOCHDIR is now misnamed. |
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236 Call it FTS_USE_FULL_RELATIVE_FILE_NAMES instead. */ |
|
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237 #define FCHDIR(sp, fd) \ |
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238 (!ISSET(FTS_NOCHDIR) && (ISSET(FTS_CWDFD) \ |
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239 ? (cwd_advance_fd ((sp), (fd), true), 0) \ |
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240 : fchdir (fd))) |
| 7151 | 241 |
| 5858 | 242 |
| 243 /* fts_build flags */ | |
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244 /* FIXME: make this an enum */ |
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245 #define BCHILD 1 /* fts_children */ |
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246 #define BNAMES 2 /* fts_children, names only */ |
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247 #define BREAD 3 /* fts_read */ |
| 5858 | 248 |
| 249 #if FTS_DEBUG | |
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250 # include <inttypes.h> |
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251 # include <stdint.h> |
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252 # include <stdio.h> |
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253 # include "getcwdat.h" |
| 5858 | 254 bool fts_debug = false; |
|
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255 # define Dprintf(x) do { if (fts_debug) printf x; } while (false) |
| 5858 | 256 #else |
| 257 # define Dprintf(x) | |
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258 # define fd_ring_check(x) |
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259 # define fd_ring_print(a, b, c) |
| 5858 | 260 #endif |
| 261 | |
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262 #define LEAVE_DIR(Fts, Ent, Tag) \ |
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263 do \ |
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264 { \ |
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265 Dprintf ((" %s-leaving: %s\n", Tag, (Ent)->fts_path)); \ |
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266 leave_dir (Fts, Ent); \ |
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267 fd_ring_check (Fts); \ |
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268 } \ |
| 5872 | 269 while (false) |
| 5858 | 270 |
|
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271 static void |
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272 fd_ring_clear (I_ring *fd_ring) |
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273 { |
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274 while ( ! i_ring_empty (fd_ring)) |
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275 { |
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276 int fd = i_ring_pop (fd_ring); |
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277 if (0 <= fd) |
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278 close (fd); |
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279 } |
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280 } |
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281 |
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282 /* Overload the fts_statp->st_size member (otherwise unused, when |
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283 fts_info is FTS_NSOK) to indicate whether fts_read should stat |
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284 this entry or not. */ |
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285 static void |
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286 fts_set_stat_required (FTSENT *p, bool required) |
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287 { |
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288 fts_assert (p->fts_info == FTS_NSOK); |
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289 p->fts_statp->st_size = (required |
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290 ? FTS_STAT_REQUIRED |
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291 : FTS_NO_STAT_REQUIRED); |
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292 } |
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293 |
| 7151 | 294 /* file-descriptor-relative opendir. */ |
| 295 /* FIXME: if others need this function, move it into lib/openat.c */ | |
|
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296 static DIR * |
| 7151 | 297 internal_function |
|
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298 opendirat (int fd, char const *dir, int extra_flags, int *pdir_fd) |
| 7151 | 299 { |
|
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300 int new_fd = openat (fd, dir, |
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301 (O_RDONLY | O_DIRECTORY | O_NOCTTY | O_NONBLOCK |
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302 | extra_flags)); |
| 7151 | 303 DIR *dirp; |
| 304 | |
| 305 if (new_fd < 0) | |
| 306 return NULL; | |
| 11940 | 307 set_cloexec_flag (new_fd, true); |
| 7151 | 308 dirp = fdopendir (new_fd); |
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309 if (dirp) |
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310 *pdir_fd = new_fd; |
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311 else |
| 7151 | 312 { |
| 313 int saved_errno = errno; | |
| 314 close (new_fd); | |
| 315 errno = saved_errno; | |
| 316 } | |
| 317 return dirp; | |
| 318 } | |
| 319 | |
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320 /* Virtual fchdir. Advance SP's working directory file descriptor, |
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321 SP->fts_cwd_fd, to FD, and push the previous value onto the fd_ring. |
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322 CHDIR_DOWN_ONE is true if FD corresponds to an entry in the directory |
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323 open on sp->fts_cwd_fd; i.e., to move the working directory one level |
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324 down. */ |
| 7151 | 325 static void |
| 326 internal_function | |
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327 cwd_advance_fd (FTS *sp, int fd, bool chdir_down_one) |
| 7151 | 328 { |
| 329 int old = sp->fts_cwd_fd; | |
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330 fts_assert (old != fd || old == AT_FDCWD); |
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331 |
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332 if (chdir_down_one) |
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333 { |
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334 /* Push "old" onto the ring. |
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335 If the displaced file descriptor is non-negative, close it. */ |
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336 int prev_fd_in_slot = i_ring_push (&sp->fts_fd_ring, old); |
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337 fd_ring_print (sp, stderr, "post-push"); |
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338 if (0 <= prev_fd_in_slot) |
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339 close (prev_fd_in_slot); /* ignore any close failure */ |
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340 } |
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341 else if ( ! ISSET (FTS_NOCHDIR)) |
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342 { |
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343 if (0 <= old) |
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344 close (old); /* ignore any close failure */ |
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345 } |
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346 |
| 7151 | 347 sp->fts_cwd_fd = fd; |
| 348 } | |
| 349 | |
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350 /* Restore the initial, pre-traversal, "working directory". |
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351 In FTS_CWDFD mode, we merely call cwd_advance_fd, otherwise, |
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352 we may actually change the working directory. |
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353 Return 0 upon success. Upon failure, set errno and return nonzero. */ |
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354 static int |
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355 restore_initial_cwd (FTS *sp) |
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356 { |
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357 int fail = FCHDIR (sp, ISSET (FTS_CWDFD) ? AT_FDCWD : sp->fts_rfd); |
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358 fd_ring_clear (&(sp->fts_fd_ring)); |
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359 return fail; |
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360 } |
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361 |
| 5858 | 362 /* Open the directory DIR if possible, and return a file |
| 363 descriptor. Return -1 and set errno on failure. It doesn't matter | |
| 364 whether the file descriptor has read or write access. */ | |
| 365 | |
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366 static int |
| 5858 | 367 internal_function |
| 7151 | 368 diropen (FTS const *sp, char const *dir) |
| 5858 | 369 { |
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370 int open_flags = (O_SEARCH | O_DIRECTORY | O_NOCTTY | O_NONBLOCK |
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371 | (ISSET (FTS_PHYSICAL) ? O_NOFOLLOW : 0) |
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372 | (ISSET (FTS_NOATIME) ? O_NOATIME : 0)); |
| 7151 | 373 |
| 11940 | 374 int fd = (ISSET (FTS_CWDFD) |
| 375 ? openat (sp->fts_cwd_fd, dir, open_flags) | |
| 376 : open (dir, open_flags)); | |
| 377 if (0 <= fd) | |
| 378 set_cloexec_flag (fd, true); | |
| 379 return fd; | |
| 5858 | 380 } |
| 381 | |
| 382 FTS * | |
| 383 fts_open (char * const *argv, | |
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384 register int options, |
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385 int (*compar) (FTSENT const **, FTSENT const **)) |
| 5858 | 386 { |
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387 register FTS *sp; |
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388 register FTSENT *p, *root; |
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389 register size_t nitems; |
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390 FTSENT *parent = NULL; |
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391 FTSENT *tmp = NULL; /* pacify gcc */ |
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392 bool defer_stat; |
| 5858 | 393 |
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394 /* Options check. */ |
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395 if (options & ~FTS_OPTIONMASK) { |
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396 __set_errno (EINVAL); |
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397 return (NULL); |
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398 } |
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399 if ((options & FTS_NOCHDIR) && (options & FTS_CWDFD)) { |
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400 __set_errno (EINVAL); |
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401 return (NULL); |
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402 } |
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403 if ( ! (options & (FTS_LOGICAL | FTS_PHYSICAL))) { |
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404 __set_errno (EINVAL); |
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405 return (NULL); |
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406 } |
| 5858 | 407 |
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408 /* Allocate/initialize the stream */ |
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409 if ((sp = malloc(sizeof(FTS))) == NULL) |
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410 return (NULL); |
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411 memset(sp, 0, sizeof(FTS)); |
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412 sp->fts_compar = compar; |
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413 sp->fts_options = options; |
| 5858 | 414 |
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415 /* Logical walks turn on NOCHDIR; symbolic links are too hard. */ |
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416 if (ISSET(FTS_LOGICAL)) { |
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417 SET(FTS_NOCHDIR); |
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418 CLR(FTS_CWDFD); |
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419 } |
| 7151 | 420 |
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421 /* Initialize fts_cwd_fd. */ |
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422 sp->fts_cwd_fd = AT_FDCWD; |
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423 if ( ISSET(FTS_CWDFD) && ! HAVE_OPENAT_SUPPORT) |
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424 { |
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425 /* While it isn't technically necessary to open "." this |
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426 early, doing it here saves us the trouble of ensuring |
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427 later (where it'd be messier) that "." can in fact |
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428 be opened. If not, revert to FTS_NOCHDIR mode. */ |
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429 int fd = open (".", |
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430 O_SEARCH | (ISSET (FTS_NOATIME) ? O_NOATIME : 0)); |
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431 if (fd < 0) |
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432 { |
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433 /* Even if "." is unreadable, don't revert to FTS_NOCHDIR mode |
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434 on systems like Linux+PROC_FS, where our openat emulation |
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435 is good enough. Note: on a system that emulates |
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436 openat via /proc, this technique can still fail, but |
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437 only in extreme conditions, e.g., when the working |
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438 directory cannot be saved (i.e. save_cwd fails) -- |
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439 and that happens on Linux only when "." is unreadable |
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440 and the CWD would be longer than PATH_MAX. |
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441 FIXME: once Linux kernel openat support is well established, |
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442 replace the above open call and this entire if/else block |
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443 with the body of the if-block below. */ |
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444 if ( openat_needs_fchdir ()) |
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445 { |
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446 SET(FTS_NOCHDIR); |
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447 CLR(FTS_CWDFD); |
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448 } |
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449 } |
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450 else |
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451 { |
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452 close (fd); |
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453 } |
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454 } |
| 5858 | 455 |
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456 /* |
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457 * Start out with 1K of file name space, and enough, in any case, |
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458 * to hold the user's file names. |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
459 */ |
| 5858 | 460 #ifndef MAXPATHLEN |
| 461 # define MAXPATHLEN 1024 | |
| 462 #endif | |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
463 { |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
464 size_t maxarglen = fts_maxarglen(argv); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
465 if (! fts_palloc(sp, MAX(maxarglen, MAXPATHLEN))) |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
466 goto mem1; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
467 } |
| 5858 | 468 |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
469 /* Allocate/initialize root's parent. */ |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
470 if (*argv != NULL) { |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
471 if ((parent = fts_alloc(sp, "", 0)) == NULL) |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
472 goto mem2; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
473 parent->fts_level = FTS_ROOTPARENTLEVEL; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
474 } |
| 5858 | 475 |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
476 /* 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
|
477 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
|
478 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
|
479 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
|
480 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
|
481 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
|
482 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
|
483 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
|
484 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
|
485 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
|
486 data via the fts_statp pointer. */ |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
487 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
|
488 |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
489 /* Allocate/initialize root(s). */ |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
490 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
|
491 /* *Do* allow zero-length file names. */ |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
492 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
|
493 |
|
17160
72f4bab621be
fts: introduce FTS_VERBATIM
Dmitry V. Levin <ldv@altlinux.org>
parents:
17074
diff
changeset
|
494 if ( ! (options & FTS_VERBATIM)) |
|
72f4bab621be
fts: introduce FTS_VERBATIM
Dmitry V. Levin <ldv@altlinux.org>
parents:
17074
diff
changeset
|
495 { |
|
72f4bab621be
fts: introduce FTS_VERBATIM
Dmitry V. Levin <ldv@altlinux.org>
parents:
17074
diff
changeset
|
496 /* If there are two or more trailing slashes, trim all but one, |
|
72f4bab621be
fts: introduce FTS_VERBATIM
Dmitry V. Levin <ldv@altlinux.org>
parents:
17074
diff
changeset
|
497 but don't change "//" to "/", and do map "///" to "/". */ |
|
72f4bab621be
fts: introduce FTS_VERBATIM
Dmitry V. Levin <ldv@altlinux.org>
parents:
17074
diff
changeset
|
498 char const *v = *argv; |
|
72f4bab621be
fts: introduce FTS_VERBATIM
Dmitry V. Levin <ldv@altlinux.org>
parents:
17074
diff
changeset
|
499 if (2 < len && v[len - 1] == '/') |
|
72f4bab621be
fts: introduce FTS_VERBATIM
Dmitry V. Levin <ldv@altlinux.org>
parents:
17074
diff
changeset
|
500 while (1 < len && v[len - 2] == '/') |
|
72f4bab621be
fts: introduce FTS_VERBATIM
Dmitry V. Levin <ldv@altlinux.org>
parents:
17074
diff
changeset
|
501 --len; |
|
72f4bab621be
fts: introduce FTS_VERBATIM
Dmitry V. Levin <ldv@altlinux.org>
parents:
17074
diff
changeset
|
502 } |
|
17074
d4ccb0388f18
fts: reduce two or more trailing slashes to just one, usually
Jim Meyering <meyering@redhat.com>
parents:
17073
diff
changeset
|
503 |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
504 if ((p = fts_alloc(sp, *argv, len)) == NULL) |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
505 goto mem3; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
506 p->fts_level = FTS_ROOTLEVEL; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
507 p->fts_parent = parent; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
508 p->fts_accpath = p->fts_name; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
509 /* 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
|
510 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
|
511 FTS_XDEV) requires that. */ |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
512 if (defer_stat && root != NULL) { |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
513 p->fts_info = FTS_NSOK; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
514 fts_set_stat_required(p, true); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
515 } else { |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
516 p->fts_info = fts_stat(sp, p, false); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
517 } |
| 5858 | 518 |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
519 /* |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
520 * If comparison routine supplied, traverse in sorted |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
521 * order; otherwise traverse in the order specified. |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
522 */ |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
523 if (compar) { |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
524 p->fts_link = root; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
525 root = p; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
526 } else { |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
527 p->fts_link = NULL; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
528 if (root == NULL) |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
529 tmp = root = p; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
530 else { |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
531 tmp->fts_link = p; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
532 tmp = p; |
|
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 } |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
535 } |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
536 if (compar && nitems > 1) |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
537 root = fts_sort(sp, root, nitems); |
| 5858 | 538 |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
539 /* |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
540 * 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
|
541 * 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
|
542 * 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
|
543 */ |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
544 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
|
545 goto mem3; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
546 sp->fts_cur->fts_link = root; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
547 sp->fts_cur->fts_info = FTS_INIT; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
548 if (! setup_dir (sp)) |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
549 goto mem3; |
| 5858 | 550 |
|
12421
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 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
|
553 * 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
|
554 * 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
|
555 * 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
|
556 * descriptor we run anyway, just more slowly. |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
557 */ |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
558 if (!ISSET(FTS_NOCHDIR) && !ISSET(FTS_CWDFD) |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
559 && (sp->fts_rfd = diropen (sp, ".")) < 0) |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
560 SET(FTS_NOCHDIR); |
| 5858 | 561 |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
562 i_ring_init (&sp->fts_fd_ring, -1); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
563 return (sp); |
| 5858 | 564 |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
565 mem3: fts_lfree(root); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
566 free(parent); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
567 mem2: free(sp->fts_path); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
568 mem1: free(sp); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
569 return (NULL); |
| 5858 | 570 } |
| 571 | |
| 572 static void | |
| 573 internal_function | |
| 574 fts_load (FTS *sp, register FTSENT *p) | |
| 575 { | |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
576 register size_t len; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
577 register char *cp; |
| 5858 | 578 |
|
12421
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 * 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
|
581 * 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
|
582 * 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
|
583 * 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
|
584 * known that the file name will fit. |
|
e8d2c6fc33ad
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585 */ |
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586 len = p->fts_pathlen = p->fts_namelen; |
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587 memmove(sp->fts_path, p->fts_name, len + 1); |
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588 if ((cp = strrchr(p->fts_name, '/')) && (cp != p->fts_name || cp[1])) { |
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589 len = strlen(++cp); |
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590 memmove(p->fts_name, cp, len + 1); |
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591 p->fts_namelen = len; |
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592 } |
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593 p->fts_accpath = p->fts_path = sp->fts_path; |
| 5858 | 594 } |
| 595 | |
| 596 int | |
| 597 fts_close (FTS *sp) | |
| 598 { | |
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599 register FTSENT *freep, *p; |
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600 int saved_errno = 0; |
| 5858 | 601 |
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602 /* |
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603 * This still works if we haven't read anything -- the dummy structure |
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604 * points to the root list, so we step through to the end of the root |
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605 * list which has a valid parent pointer. |
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606 */ |
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607 if (sp->fts_cur) { |
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608 for (p = sp->fts_cur; p->fts_level >= FTS_ROOTLEVEL;) { |
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609 freep = p; |
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610 p = p->fts_link != NULL ? p->fts_link : p->fts_parent; |
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611 free(freep); |
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612 } |
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613 free(p); |
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614 } |
| 5858 | 615 |
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616 /* Free up child linked list, sort array, file name buffer. */ |
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617 if (sp->fts_child) |
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618 fts_lfree(sp->fts_child); |
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619 free(sp->fts_array); |
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620 free(sp->fts_path); |
| 5858 | 621 |
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622 if (ISSET(FTS_CWDFD)) |
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623 { |
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624 if (0 <= sp->fts_cwd_fd) |
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625 if (close (sp->fts_cwd_fd)) |
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626 saved_errno = errno; |
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627 } |
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628 else if (!ISSET(FTS_NOCHDIR)) |
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629 { |
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630 /* Return to original directory, save errno if necessary. */ |
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631 if (fchdir(sp->fts_rfd)) |
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632 saved_errno = errno; |
|
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633 |
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634 /* If close fails, record errno only if saved_errno is zero, |
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635 so that we report the probably-more-meaningful fchdir errno. */ |
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636 if (close (sp->fts_rfd)) |
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637 if (saved_errno == 0) |
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638 saved_errno = errno; |
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639 } |
| 5858 | 640 |
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641 fd_ring_clear (&sp->fts_fd_ring); |
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642 |
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643 if (sp->fts_leaf_optimization_works_ht) |
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644 hash_free (sp->fts_leaf_optimization_works_ht); |
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645 |
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646 free_dir (sp); |
| 5858 | 647 |
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648 /* Free up the stream pointer. */ |
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649 free(sp); |
| 5858 | 650 |
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651 /* Set errno and return. */ |
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652 if (saved_errno) { |
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653 __set_errno (saved_errno); |
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654 return (-1); |
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655 } |
| 5858 | 656 |
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657 return (0); |
| 5858 | 658 } |
| 659 | |
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660 #if defined __linux__ \ |
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661 && HAVE_SYS_VFS_H && HAVE_FSTATFS && HAVE_STRUCT_STATFS_F_TYPE |
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662 |
|
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663 # include <sys/vfs.h> |
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664 |
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665 /* Linux-specific constants from coreutils' src/fs.h */ |
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666 # define S_MAGIC_TMPFS 0x1021994 |
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667 # define S_MAGIC_NFS 0x6969 |
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668 # define S_MAGIC_REISERFS 0x52654973 |
|
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669 # define S_MAGIC_XFS 0x58465342 |
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670 # define S_MAGIC_PROC 0x9FA0 |
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671 |
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672 /* Return false if it is easy to determine the file system type of |
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673 the directory on which DIR_FD is open, and sorting dirents on |
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674 inode numbers is known not to improve traversal performance with |
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675 that type of file system. Otherwise, return true. */ |
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676 static bool |
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677 dirent_inode_sort_may_be_useful (int dir_fd) |
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678 { |
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679 /* Skip the sort only if we can determine efficiently |
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680 that skipping it is the right thing to do. |
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681 The cost of performing an unnecessary sort is negligible, |
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682 while the cost of *not* performing it can be O(N^2) with |
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683 a very large constant. */ |
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684 struct statfs fs_buf; |
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685 |
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686 /* If fstatfs fails, assume sorting would be useful. */ |
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687 if (fstatfs (dir_fd, &fs_buf) != 0) |
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688 return true; |
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689 |
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690 /* FIXME: what about when f_type is not an integral type? |
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691 deal with that if/when it's encountered. */ |
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692 switch (fs_buf.f_type) |
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693 { |
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694 case S_MAGIC_TMPFS: |
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695 case S_MAGIC_NFS: |
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696 /* On a file system of any of these types, sorting |
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697 is unnecessary, and hence wasteful. */ |
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698 return false; |
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699 |
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700 default: |
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701 return true; |
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702 } |
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703 } |
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704 |
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705 /* Given a file descriptor DIR_FD open on a directory D, |
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706 return true if it is valid to apply the leaf-optimization |
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707 technique of counting directories in D via stat.st_nlink. */ |
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708 static bool |
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709 leaf_optimization_applies (int dir_fd) |
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710 { |
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711 struct statfs fs_buf; |
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712 |
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713 /* If fstatfs fails, assume we can't use the optimization. */ |
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714 if (fstatfs (dir_fd, &fs_buf) != 0) |
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715 return false; |
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716 |
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717 /* FIXME: do we need to detect AFS mount points? I doubt it, |
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718 unless fstatfs can report S_MAGIC_REISERFS for such a directory. */ |
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719 |
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720 switch (fs_buf.f_type) |
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721 { |
| 16358 | 722 /* List here the file system types that lack usable dirent.d_type |
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723 info, yet for which the optimization does apply. */ |
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724 case S_MAGIC_REISERFS: |
|
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725 case S_MAGIC_XFS: |
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726 return true; |
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727 |
|
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728 /* Explicitly list here any other file system type for which the |
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729 optimization is not applicable, but need documentation. */ |
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730 case S_MAGIC_NFS: |
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731 /* NFS provides usable dirent.d_type but not necessarily for all entries |
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732 of large directories, so as per <https://bugzilla.redhat.com/1252549> |
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733 NFS should return true. However st_nlink values are not accurate on |
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734 all implementations as per <https://bugzilla.redhat.com/1299169>. */ |
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735 /* fall through */ |
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736 case S_MAGIC_PROC: |
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737 /* Per <http://bugs.debian.org/143111> /proc may have |
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738 bogus stat.st_nlink values. */ |
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739 /* fall through */ |
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740 default: |
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741 return false; |
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742 } |
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743 } |
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744 |
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745 #else |
| 12050 | 746 static bool |
|
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747 dirent_inode_sort_may_be_useful (int dir_fd _GL_UNUSED) { return true; } |
| 12050 | 748 static bool |
|
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749 leaf_optimization_applies (int dir_fd _GL_UNUSED) { return false; } |
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750 #endif |
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751 |
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752 /* link-count-optimization entry: |
|
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753 map a stat.st_dev number to a boolean: leaf_optimization_works */ |
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754 struct LCO_ent |
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755 { |
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756 dev_t st_dev; |
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757 bool opt_ok; |
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758 }; |
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759 |
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760 /* Use a tiny initial size. If a traversal encounters more than |
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761 a few devices, the cost of growing/rehashing this table will be |
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762 rendered negligible by the number of inodes processed. */ |
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763 enum { LCO_HT_INITIAL_SIZE = 13 }; |
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764 |
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765 static size_t |
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766 LCO_hash (void const *x, size_t table_size) |
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767 { |
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768 struct LCO_ent const *ax = x; |
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769 return (uintmax_t) ax->st_dev % table_size; |
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770 } |
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771 |
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772 static bool |
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773 LCO_compare (void const *x, void const *y) |
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774 { |
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775 struct LCO_ent const *ax = x; |
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776 struct LCO_ent const *ay = y; |
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777 return ax->st_dev == ay->st_dev; |
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778 } |
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779 |
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780 /* Ask the same question as leaf_optimization_applies, but query |
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781 the cache first (FTS.fts_leaf_optimization_works_ht), and if necessary, |
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782 update that cache. */ |
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783 static bool |
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784 link_count_optimize_ok (FTSENT const *p) |
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785 { |
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|
786 FTS *sp = p->fts_fts; |
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787 Hash_table *h = sp->fts_leaf_optimization_works_ht; |
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788 struct LCO_ent tmp; |
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789 struct LCO_ent *ent; |
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790 bool opt_ok; |
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791 struct LCO_ent *t2; |
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792 |
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793 /* If we're not in CWDFD mode, don't bother with this optimization, |
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794 since the caller is not serious about performance. */ |
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795 if (!ISSET(FTS_CWDFD)) |
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796 return false; |
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797 |
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798 /* map st_dev to the boolean, leaf_optimization_works */ |
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799 if (h == NULL) |
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800 { |
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801 h = sp->fts_leaf_optimization_works_ht |
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802 = hash_initialize (LCO_HT_INITIAL_SIZE, NULL, LCO_hash, |
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803 LCO_compare, free); |
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804 if (h == NULL) |
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805 return false; |
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806 } |
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807 tmp.st_dev = p->fts_statp->st_dev; |
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808 ent = hash_lookup (h, &tmp); |
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809 if (ent) |
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810 return ent->opt_ok; |
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811 |
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812 /* Look-up failed. Query directly and cache the result. */ |
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813 t2 = malloc (sizeof *t2); |
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814 if (t2 == NULL) |
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815 return false; |
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816 |
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817 /* Is it ok to perform the optimization in the dir, FTS_CWD_FD? */ |
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818 opt_ok = leaf_optimization_applies (sp->fts_cwd_fd); |
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819 t2->opt_ok = opt_ok; |
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820 t2->st_dev = p->fts_statp->st_dev; |
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821 |
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822 ent = hash_insert (h, t2); |
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823 if (ent == NULL) |
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|
824 { |
|
90715da41753
fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents:
11163
diff
changeset
|
825 /* insertion failed */ |
|
90715da41753
fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents:
11163
diff
changeset
|
826 free (t2); |
|
90715da41753
fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents:
11163
diff
changeset
|
827 return false; |
|
90715da41753
fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents:
11163
diff
changeset
|
828 } |
|
90715da41753
fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents:
11163
diff
changeset
|
829 fts_assert (ent == t2); |
|
90715da41753
fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents:
11163
diff
changeset
|
830 |
|
90715da41753
fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents:
11163
diff
changeset
|
831 return opt_ok; |
|
90715da41753
fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents:
11163
diff
changeset
|
832 } |
|
90715da41753
fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents:
11163
diff
changeset
|
833 |
| 5858 | 834 /* |
| 5907 | 835 * Special case of "/" at the end of the file name so that slashes aren't |
| 836 * appended which would cause file names to be written as "....//foo". | |
| 5858 | 837 */ |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
838 #define NAPPEND(p) \ |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
839 (p->fts_path[p->fts_pathlen - 1] == '/' \ |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
840 ? p->fts_pathlen - 1 : p->fts_pathlen) |
| 5858 | 841 |
| 842 FTSENT * | |
| 843 fts_read (register FTS *sp) | |
| 844 { | |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
845 register FTSENT *p, *tmp; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
846 register unsigned short int instr; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
847 register char *t; |
| 5858 | 848 |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
849 /* If finished or unrecoverable error, return NULL. */ |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
850 if (sp->fts_cur == NULL || ISSET(FTS_STOP)) |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
851 return (NULL); |
| 5858 | 852 |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
853 /* Set current node pointer. */ |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
854 p = sp->fts_cur; |
| 5858 | 855 |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
856 /* Save and zero out user instructions. */ |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
857 instr = p->fts_instr; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
858 p->fts_instr = FTS_NOINSTR; |
| 5858 | 859 |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
860 /* 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
|
861 if (instr == FTS_AGAIN) { |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
862 p->fts_info = fts_stat(sp, p, false); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
863 return (p); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
864 } |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
865 Dprintf (("fts_read: p=%s\n", |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
866 p->fts_info == FTS_INIT ? "" : p->fts_path)); |
| 5858 | 867 |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
868 /* |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
869 * 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
|
870 * 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
|
871 * 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
|
872 * pointer, follow fails. |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
873 */ |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
874 if (instr == FTS_FOLLOW && |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
875 (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
|
876 p->fts_info = fts_stat(sp, p, true); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
877 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
|
878 if ((p->fts_symfd = diropen (sp, ".")) < 0) { |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
879 p->fts_errno = errno; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
880 p->fts_info = FTS_ERR; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
881 } else |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
882 p->fts_flags |= FTS_SYMFOLLOW; |
|
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 goto check_for_dir; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
885 } |
| 5858 | 886 |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
887 /* Directory in pre-order. */ |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
888 if (p->fts_info == FTS_D) { |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
889 /* 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
|
890 if (instr == FTS_SKIP || |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
891 (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
|
892 if (p->fts_flags & FTS_SYMFOLLOW) |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
893 (void)close(p->fts_symfd); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
894 if (sp->fts_child) { |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
895 fts_lfree(sp->fts_child); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
896 sp->fts_child = NULL; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
897 } |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
898 p->fts_info = FTS_DP; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
899 LEAVE_DIR (sp, p, "1"); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
900 return (p); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
901 } |
| 5858 | 902 |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
903 /* 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
|
904 if (sp->fts_child != NULL && ISSET(FTS_NAMEONLY)) { |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
905 CLR(FTS_NAMEONLY); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
906 fts_lfree(sp->fts_child); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
907 sp->fts_child = NULL; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
908 } |
| 5858 | 909 |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
910 /* |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
911 * Cd to the subdirectory. |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
912 * |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
913 * 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
|
914 * 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
|
915 * 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
|
916 * 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
|
917 * 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
|
918 * |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
919 * 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
|
920 * 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
|
921 */ |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
922 if (sp->fts_child != NULL) { |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
923 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
|
924 p->fts_errno = errno; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
925 p->fts_flags |= FTS_DONTCHDIR; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
926 for (p = sp->fts_child; p != NULL; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
927 p = p->fts_link) |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
928 p->fts_accpath = |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
929 p->fts_parent->fts_accpath; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
930 } |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
931 } 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
|
932 if (ISSET(FTS_STOP)) |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
933 return (NULL); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
934 /* 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
|
935 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
|
936 subdirectory, tell the caller. */ |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
937 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
|
938 p->fts_info = FTS_ERR; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
939 LEAVE_DIR (sp, p, "2"); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
940 return (p); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
941 } |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
942 p = sp->fts_child; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
943 sp->fts_child = NULL; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
944 goto name; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
945 } |
| 5858 | 946 |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
947 /* Move to the next node on this level. */ |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
948 next: tmp = p; |
|
15531
65fb6cc5f301
fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents:
15530
diff
changeset
|
949 |
|
65fb6cc5f301
fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents:
15530
diff
changeset
|
950 /* 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
|
951 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
|
952 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
|
953 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
|
954 { |
|
65fb6cc5f301
fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents:
15530
diff
changeset
|
955 p = tmp->fts_parent; |
|
65fb6cc5f301
fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents:
15530
diff
changeset
|
956 sp->fts_cur = p; |
|
65fb6cc5f301
fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents:
15530
diff
changeset
|
957 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
|
958 |
|
65fb6cc5f301
fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents:
15530
diff
changeset
|
959 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
|
960 { |
|
65fb6cc5f301
fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents:
15530
diff
changeset
|
961 if (ISSET(FTS_STOP)) |
|
65fb6cc5f301
fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents:
15530
diff
changeset
|
962 return NULL; |
|
65fb6cc5f301
fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents:
15530
diff
changeset
|
963 goto cd_dot_dot; |
|
65fb6cc5f301
fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents:
15530
diff
changeset
|
964 } |
|
65fb6cc5f301
fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents:
15530
diff
changeset
|
965 |
|
65fb6cc5f301
fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents:
15530
diff
changeset
|
966 free(tmp); |
|
65fb6cc5f301
fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents:
15530
diff
changeset
|
967 goto name; |
|
65fb6cc5f301
fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents:
15530
diff
changeset
|
968 } |
|
65fb6cc5f301
fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents:
15530
diff
changeset
|
969 |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
970 if ((p = p->fts_link) != NULL) { |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
971 sp->fts_cur = p; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
972 free(tmp); |
| 5858 | 973 |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
974 /* |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
975 * 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
|
976 * 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
|
977 * root. |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
978 */ |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
979 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
|
980 if (restore_initial_cwd(sp)) { |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
981 SET(FTS_STOP); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
982 return (NULL); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
983 } |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
984 free_dir(sp); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
985 fts_load(sp, p); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
986 setup_dir(sp); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
987 goto check_for_dir; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
988 } |
| 5858 | 989 |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
990 /* |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
991 * 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
|
992 * 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
|
993 * get back if necessary. |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
994 */ |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
995 if (p->fts_instr == FTS_SKIP) |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
996 goto next; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
997 if (p->fts_instr == FTS_FOLLOW) { |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
998 p->fts_info = fts_stat(sp, p, true); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
999 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
|
1000 if ((p->fts_symfd = diropen (sp, ".")) < 0) { |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1001 p->fts_errno = errno; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1002 p->fts_info = FTS_ERR; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1003 } else |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1004 p->fts_flags |= FTS_SYMFOLLOW; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1005 } |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1006 p->fts_instr = FTS_NOINSTR; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1007 } |
| 5858 | 1008 |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1009 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
|
1010 *t++ = '/'; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1011 memmove(t, p->fts_name, p->fts_namelen + 1); |
| 5872 | 1012 check_for_dir: |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1013 sp->fts_cur = p; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1014 if (p->fts_info == FTS_NSOK) |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1015 { |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1016 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
|
1017 { |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1018 FTSENT *parent = p->fts_parent; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1019 if (FTS_ROOTLEVEL < p->fts_level |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1020 /* ->fts_n_dirs_remaining is not valid |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1021 for command-line-specified names. */ |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1022 && parent->fts_n_dirs_remaining == 0 |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1023 && ISSET(FTS_NOSTAT) |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1024 && ISSET(FTS_PHYSICAL) |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1025 && link_count_optimize_ok (parent)) |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1026 { |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1027 /* nothing more needed */ |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1028 } |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1029 else |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1030 { |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1031 p->fts_info = fts_stat(sp, p, false); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1032 if (S_ISDIR(p->fts_statp->st_mode) |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1033 && p->fts_level != FTS_ROOTLEVEL |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1034 && parent->fts_n_dirs_remaining) |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1035 parent->fts_n_dirs_remaining--; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1036 } |
|
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 else |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1039 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
|
1040 } |
|
7707
3f57a32346a2
* lib/fts.c (fts_load): Don't set sp->fts_dev here, since
Jim Meyering <jim@meyering.net>
parents:
7684
diff
changeset
|
1041 |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1042 if (p->fts_info == FTS_D) |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1043 { |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1044 /* 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
|
1045 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
|
1046 device number, to be used for FTS_XDEV. */ |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1047 if (p->fts_level == FTS_ROOTLEVEL) |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1048 sp->fts_dev = p->fts_statp->st_dev; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1049 Dprintf ((" entering: %s\n", p->fts_path)); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1050 if (! enter_dir (sp, p)) |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1051 { |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1052 __set_errno (ENOMEM); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1053 return NULL; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1054 } |
|
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 return p; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1057 } |
|
15531
65fb6cc5f301
fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents:
15530
diff
changeset
|
1058 cd_dot_dot: |
| 5858 | 1059 |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1060 /* Move up to the parent node. */ |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1061 p = tmp->fts_parent; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1062 sp->fts_cur = p; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1063 free(tmp); |
| 5858 | 1064 |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1065 if (p->fts_level == FTS_ROOTPARENTLEVEL) { |
|
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 * 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:
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diff
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|
1068 * can distinguish between error and EOF. |
|
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Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
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|
1069 */ |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
changeset
|
1070 free(p); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
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|
1071 __set_errno (0); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
changeset
|
1072 return (sp->fts_cur = NULL); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
1073 } |
| 5858 | 1074 |
|
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e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
1075 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
|
1076 |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
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|
1077 /* NUL terminate the file name. */ |
|
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Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
changeset
|
1078 sp->fts_path[p->fts_pathlen] = '\0'; |
| 5858 | 1079 |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
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|
1080 /* |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
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|
1081 * 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
|
1082 * the initial working directory. If we came through a symlink, |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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diff
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|
1083 * go back through the file descriptor. Otherwise, move up |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
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|
1084 * one level, via "..". |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
1085 */ |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
1086 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
|
1087 if (restore_initial_cwd(sp)) { |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
1088 p->fts_errno = errno; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
changeset
|
1089 SET(FTS_STOP); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
1090 } |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
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|
1091 } else if (p->fts_flags & FTS_SYMFOLLOW) { |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
1092 if (FCHDIR(sp, p->fts_symfd)) { |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
1093 p->fts_errno = errno; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1094 SET(FTS_STOP); |
|
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Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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12378
diff
changeset
|
1095 } |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
1096 (void)close(p->fts_symfd); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
changeset
|
1097 } else if (!(p->fts_flags & FTS_DONTCHDIR) && |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
1098 fts_safe_changedir(sp, p->fts_parent, -1, "..")) { |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
changeset
|
1099 p->fts_errno = errno; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
1100 SET(FTS_STOP); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
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|
1101 } |
|
17914
644307da6af9
fts: avoid crash when a cycle is added while traversing
Kamil Dudka <kdudka@redhat.com>
parents:
17848
diff
changeset
|
1102 |
|
644307da6af9
fts: avoid crash when a cycle is added while traversing
Kamil Dudka <kdudka@redhat.com>
parents:
17848
diff
changeset
|
1103 /* If the directory causes a cycle, preserve the FTS_DC flag and keep |
|
644307da6af9
fts: avoid crash when a cycle is added while traversing
Kamil Dudka <kdudka@redhat.com>
parents:
17848
diff
changeset
|
1104 the corresponding dev/ino pair in the hash table. It is going to be |
|
644307da6af9
fts: avoid crash when a cycle is added while traversing
Kamil Dudka <kdudka@redhat.com>
parents:
17848
diff
changeset
|
1105 removed when leaving the original directory. */ |
|
644307da6af9
fts: avoid crash when a cycle is added while traversing
Kamil Dudka <kdudka@redhat.com>
parents:
17848
diff
changeset
|
1106 if (p->fts_info != FTS_DC) { |
|
644307da6af9
fts: avoid crash when a cycle is added while traversing
Kamil Dudka <kdudka@redhat.com>
parents:
17848
diff
changeset
|
1107 p->fts_info = p->fts_errno ? FTS_ERR : FTS_DP; |
|
644307da6af9
fts: avoid crash when a cycle is added while traversing
Kamil Dudka <kdudka@redhat.com>
parents:
17848
diff
changeset
|
1108 if (p->fts_errno == 0) |
|
644307da6af9
fts: avoid crash when a cycle is added while traversing
Kamil Dudka <kdudka@redhat.com>
parents:
17848
diff
changeset
|
1109 LEAVE_DIR (sp, p, "3"); |
|
644307da6af9
fts: avoid crash when a cycle is added while traversing
Kamil Dudka <kdudka@redhat.com>
parents:
17848
diff
changeset
|
1110 } |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
1111 return ISSET(FTS_STOP) ? NULL : p; |
| 5858 | 1112 } |
| 1113 | |
| 1114 /* | |
| 1115 * Fts_set takes the stream as an argument although it's not used in this | |
| 1116 * implementation; it would be necessary if anyone wanted to add global | |
| 1117 * semantics to fts using fts_set. An error return is allowed for similar | |
| 1118 * reasons. | |
| 1119 */ | |
| 1120 /* ARGSUSED */ | |
| 1121 int | |
|
12482
11bc92a9e2bc
gnulib-common: prefer _GL_UNUSED over _UNUSED_PARAMETER_
Eric Blake <ebb9@byu.net>
parents:
12421
diff
changeset
|
1122 fts_set(FTS *sp _GL_UNUSED, FTSENT *p, int instr) |
| 5858 | 1123 { |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
1124 if (instr != 0 && instr != FTS_AGAIN && instr != FTS_FOLLOW && |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
1125 instr != FTS_NOINSTR && instr != FTS_SKIP) { |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1126 __set_errno (EINVAL); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
1127 return (1); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
1128 } |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
1129 p->fts_instr = instr; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1130 return (0); |
| 5858 | 1131 } |
| 1132 | |
| 1133 FTSENT * | |
| 1134 fts_children (register FTS *sp, int instr) | |
| 1135 { | |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1136 register FTSENT *p; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
changeset
|
1137 int fd; |
| 5858 | 1138 |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1139 if (instr != 0 && instr != FTS_NAMEONLY) { |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1140 __set_errno (EINVAL); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1141 return (NULL); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1142 } |
| 5858 | 1143 |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
changeset
|
1144 /* Set current node pointer. */ |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
changeset
|
1145 p = sp->fts_cur; |
| 5858 | 1146 |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1147 /* |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
changeset
|
1148 * 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
|
1149 * an error. |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
1150 */ |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
changeset
|
1151 __set_errno (0); |
| 5858 | 1152 |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1153 /* Fatal errors stop here. */ |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1154 if (ISSET(FTS_STOP)) |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
changeset
|
1155 return (NULL); |
| 5858 | 1156 |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1157 /* Return logical hierarchy of user's arguments. */ |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1158 if (p->fts_info == FTS_INIT) |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
changeset
|
1159 return (p->fts_link); |
| 5858 | 1160 |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1161 /* |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
changeset
|
1162 * 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:
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diff
changeset
|
1163 * 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:
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diff
changeset
|
1164 * same effect is available with FTS_AGAIN. |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
changeset
|
1165 */ |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
changeset
|
1166 if (p->fts_info != FTS_D /* && p->fts_info != FTS_DNR */) |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
changeset
|
1167 return (NULL); |
| 5858 | 1168 |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1169 /* Free up any previous child list. */ |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
changeset
|
1170 if (sp->fts_child != NULL) |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
changeset
|
1171 fts_lfree(sp->fts_child); |
| 5858 | 1172 |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
changeset
|
1173 if (instr == FTS_NAMEONLY) { |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
changeset
|
1174 SET(FTS_NAMEONLY); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
1175 instr = BNAMES; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
changeset
|
1176 } else |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1177 instr = BCHILD; |
| 5858 | 1178 |
|
12421
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Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
changeset
|
1179 /* |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
changeset
|
1180 * 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:
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diff
changeset
|
1181 * 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
|
1182 * 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
|
1183 * 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:
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diff
changeset
|
1184 * fts_read will work. |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1185 */ |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
changeset
|
1186 if (p->fts_level != FTS_ROOTLEVEL || p->fts_accpath[0] == '/' || |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
changeset
|
1187 ISSET(FTS_NOCHDIR)) |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
changeset
|
1188 return (sp->fts_child = fts_build(sp, instr)); |
| 5858 | 1189 |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
1190 if ((fd = diropen (sp, ".")) < 0) |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1191 return (sp->fts_child = NULL); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
changeset
|
1192 sp->fts_child = fts_build(sp, instr); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1193 if (ISSET(FTS_CWDFD)) |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
changeset
|
1194 { |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1195 cwd_advance_fd (sp, fd, true); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1196 } |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
changeset
|
1197 else |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
1198 { |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
changeset
|
1199 if (fchdir(fd)) |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1200 { |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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1201 int saved_errno = errno; |
|
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1202 close (fd); |
|
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1203 __set_errno (saved_errno); |
|
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1204 return NULL; |
|
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1205 } |
|
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1206 close (fd); |
|
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1207 } |
|
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1208 return (sp->fts_child); |
| 5858 | 1209 } |
| 1210 | |
|
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1211 /* A comparison function to sort on increasing inode number. |
|
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1212 For some file system types, sorting either way makes a huge |
|
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1213 performance difference for a directory with very many entries, |
|
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1214 but sorting on increasing values is slightly better than sorting |
|
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1215 on decreasing values. The difference is in the 5% range. */ |
|
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1216 static int |
|
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1217 fts_compare_ino (struct _ftsent const **a, struct _ftsent const **b) |
|
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1218 { |
|
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1219 return (a[0]->fts_statp->st_ino < b[0]->fts_statp->st_ino ? -1 |
|
12421
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1220 : b[0]->fts_statp->st_ino < a[0]->fts_statp->st_ino ? 1 : 0); |
|
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1221 } |
|
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1222 |
|
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1223 /* Map the dirent.d_type value, DTYPE, to the corresponding stat.st_mode |
|
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1224 S_IF* bit and set ST.st_mode, thus clearing all other bits in that field. */ |
|
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|
1225 static void |
|
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1226 set_stat_type (struct stat *st, unsigned int dtype) |
|
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1227 { |
|
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1228 mode_t type; |
|
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1229 switch (dtype) |
|
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1230 { |
|
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1231 case DT_BLK: |
|
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|
1232 type = S_IFBLK; |
|
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1233 break; |
|
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1234 case DT_CHR: |
|
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1235 type = S_IFCHR; |
|
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1236 break; |
|
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1237 case DT_DIR: |
|
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1238 type = S_IFDIR; |
|
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1239 break; |
|
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1240 case DT_FIFO: |
|
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1241 type = S_IFIFO; |
|
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1242 break; |
|
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1243 case DT_LNK: |
|
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1244 type = S_IFLNK; |
|
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1245 break; |
|
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1246 case DT_REG: |
|
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1247 type = S_IFREG; |
|
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1248 break; |
|
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1249 case DT_SOCK: |
|
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1250 type = S_IFSOCK; |
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1251 break; |
|
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1252 default: |
|
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1253 type = 0; |
|
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1254 } |
| 10844 | 1255 st->st_mode = type; |
|
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1256 } |
|
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1257 |
|
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1258 #define closedir_and_clear(dirp) \ |
|
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1259 do \ |
|
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1260 { \ |
|
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1261 closedir (dirp); \ |
|
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|
1262 dirp = NULL; \ |
|
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1263 } \ |
|
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1264 while (0) |
|
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|
1265 |
|
15528
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|
1266 #define fts_opendir(file, Pdir_fd) \ |
|
15525
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|
1267 opendirat((! ISSET(FTS_NOCHDIR) && ISSET(FTS_CWDFD) \ |
|
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1268 ? sp->fts_cwd_fd : AT_FDCWD), \ |
|
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|
1269 file, \ |
|
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|
1270 (((ISSET(FTS_PHYSICAL) \ |
|
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1271 && ! (ISSET(FTS_COMFOLLOW) \ |
|
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1272 && cur->fts_level == FTS_ROOTLEVEL)) \ |
|
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1273 ? O_NOFOLLOW : 0) \ |
|
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1274 | (ISSET (FTS_NOATIME) ? O_NOATIME : 0)), \ |
|
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|
1275 Pdir_fd) |
|
15525
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|
1276 |
| 5858 | 1277 /* |
| 1278 * This is the tricky part -- do not casually change *anything* in here. The | |
| 1279 * idea is to build the linked list of entries that are used by fts_children | |
| 1280 * and fts_read. There are lots of special cases. | |
| 1281 * | |
| 1282 * The real slowdown in walking the tree is the stat calls. If FTS_NOSTAT is | |
| 1283 * set and it's a physical walk (so that symbolic links can't be directories), | |
| 1284 * we can do things quickly. First, if it's a 4.4BSD file system, the type | |
| 1285 * of the file is in the directory entry. Otherwise, we assume that the number | |
| 1286 * of subdirectories in a node is equal to the number of links to the parent. | |
| 1287 * The former skips all stat calls. The latter skips stat calls in any leaf | |
| 1288 * directories and for any files after the subdirectories in the directory have | |
| 1289 * been found, cutting the stat calls by about 2/3. | |
| 1290 */ | |
| 1291 static FTSENT * | |
| 1292 internal_function | |
| 1293 fts_build (register FTS *sp, int type) | |
| 1294 { | |
|
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1295 register FTSENT *p, *head; |
|
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1296 register size_t nitems; |
|
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1297 FTSENT *tail; |
|
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1298 void *oldaddr; |
|
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1299 int saved_errno; |
|
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1300 bool descend; |
|
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1301 bool doadjust; |
|
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1302 ptrdiff_t level; |
|
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|
1303 nlink_t nlinks; |
|
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|
1304 bool nostat; |
|
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|
1305 size_t len, maxlen, new_len; |
|
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|
1306 char *cp; |
|
13676
223800d7ac7d
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|
1307 int dir_fd; |
|
15529
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|
1308 FTSENT *cur = sp->fts_cur; |
|
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|
1309 bool continue_readdir = !!cur->fts_dirp; |
| 17797 | 1310 size_t max_entries; |
| 5858 | 1311 |
|
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|
1312 /* When cur->fts_dirp is non-NULL, that means we should |
|
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|
1313 continue calling readdir on that existing DIR* pointer |
|
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|
1314 rather than opening a new one. */ |
|
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|
1315 if (continue_readdir) |
|
15526
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|
1316 { |
|
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|
1317 DIR *dp = cur->fts_dirp; |
|
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|
1318 dir_fd = dirfd (dp); |
|
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|
1319 if (dir_fd < 0) |
|
15526
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1320 { |
|
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|
1321 closedir_and_clear (cur->fts_dirp); |
|
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1322 if (type == BREAD) |
|
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1323 { |
|
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|
1324 cur->fts_info = FTS_DNR; |
|
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1325 cur->fts_errno = errno; |
|
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changeset
|
1326 } |
|
15526
95cf436ab3b8
maint: fts.c: correct off-by-one indentation
Jim Meyering <meyering@redhat.com>
parents:
15525
diff
changeset
|
1327 return NULL; |
|
95cf436ab3b8
maint: fts.c: correct off-by-one indentation
Jim Meyering <meyering@redhat.com>
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15525
diff
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|
1328 } |
|
95cf436ab3b8
maint: fts.c: correct off-by-one indentation
Jim Meyering <meyering@redhat.com>
parents:
15525
diff
changeset
|
1329 } |
|
15531
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diff
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|
1330 else |
|
65fb6cc5f301
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Jim Meyering <meyering@redhat.com>
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|
1331 { |
|
65fb6cc5f301
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|
1332 /* Open the directory for reading. If this fails, we're done. |
|
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|
1333 If being called from fts_read, set the fts_info field. */ |
|
65fb6cc5f301
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Jim Meyering <meyering@redhat.com>
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diff
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|
1334 if ((cur->fts_dirp = fts_opendir(cur->fts_accpath, &dir_fd)) == NULL) |
|
65fb6cc5f301
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|
1335 { |
|
65fb6cc5f301
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|
1336 if (type == BREAD) |
|
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|
1337 { |
|
65fb6cc5f301
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|
1338 cur->fts_info = FTS_DNR; |
|
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|
1339 cur->fts_errno = errno; |
|
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|
1340 } |
|
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|
1341 return NULL; |
|
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|
1342 } |
|
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|
1343 /* Rather than calling fts_stat for each and every entry encountered |
|
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diff
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|
1344 in the readdir loop (below), stat each directory only right after |
|
65fb6cc5f301
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|
1345 opening it. */ |
|
65fb6cc5f301
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|
1346 if (cur->fts_info == FTS_NSOK) |
|
65fb6cc5f301
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|
1347 cur->fts_info = fts_stat(sp, cur, false); |
|
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|
1348 else if (sp->fts_options & FTS_TIGHT_CYCLE_CHECK) |
|
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|
1349 { |
|
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|
1350 /* Now read the stat info again after opening a directory to |
|
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|
1351 reveal eventual changes caused by a submount triggered by |
|
65fb6cc5f301
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Jim Meyering <meyering@redhat.com>
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|
1352 the traversal. But do it only for utilities which use |
|
65fb6cc5f301
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Jim Meyering <meyering@redhat.com>
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|
1353 FTS_TIGHT_CYCLE_CHECK. Therefore, only find and du |
|
65fb6cc5f301
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|
1354 benefit/suffer from this feature for now. */ |
|
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|
1355 LEAVE_DIR (sp, cur, "4"); |
|
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|
1356 fts_stat (sp, cur, false); |
|
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|
1357 if (! enter_dir (sp, cur)) |
|
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|
1358 { |
|
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|
1359 __set_errno (ENOMEM); |
|
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|
1360 return NULL; |
|
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|
1361 } |
|
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|
1362 } |
|
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|
1363 } |
| 5858 | 1364 |
|
15531
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|
1365 /* Maximum number of readdir entries to read at one time. This |
|
65fb6cc5f301
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diff
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|
1366 limitation is to avoid reading millions of entries into memory |
|
65fb6cc5f301
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Jim Meyering <meyering@redhat.com>
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diff
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|
1367 at once. When an fts_compar function is specified, we have no |
|
65fb6cc5f301
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diff
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|
1368 choice: we must read all entries into memory before calling that |
|
65fb6cc5f301
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Jim Meyering <meyering@redhat.com>
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diff
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|
1369 function. But when no such function is specified, we can read |
|
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Jim Meyering <meyering@redhat.com>
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|
1370 entries in batches that are large enough to help us with inode- |
|
65fb6cc5f301
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Jim Meyering <meyering@redhat.com>
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|
1371 sorting, yet not so large that we risk exhausting memory. */ |
| 17797 | 1372 max_entries = sp->fts_compar ? SIZE_MAX : FTS_MAX_READDIR_ENTRIES; |
|
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|
1373 |
|
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|
1374 /* |
|
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|
1375 * Nlinks is the number of possible entries of type directory in the |
|
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|
1376 * directory if we're cheating on stat calls, 0 if we're not doing |
|
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|
1377 * any stat calls at all, (nlink_t) -1 if we're statting everything. |
|
65fb6cc5f301
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diff
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|
1378 */ |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
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|
1379 if (type == BNAMES) { |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
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|
1380 nlinks = 0; |
|
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Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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|
1381 /* Be quiet about nostat, GCC. */ |
|
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Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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|
1382 nostat = false; |
|
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Bruno Haible <bruno@clisp.org>
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|
1383 } else if (ISSET(FTS_NOSTAT) && ISSET(FTS_PHYSICAL)) { |
|
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Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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|
1384 nlinks = (cur->fts_statp->st_nlink |
|
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Bruno Haible <bruno@clisp.org>
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diff
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|
1385 - (ISSET(FTS_SEEDOT) ? 0 : 2)); |
|
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Bruno Haible <bruno@clisp.org>
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|
1386 nostat = true; |
|
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Bruno Haible <bruno@clisp.org>
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diff
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|
1387 } else { |
|
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Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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|
1388 nlinks = -1; |
|
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Bruno Haible <bruno@clisp.org>
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|
1389 nostat = false; |
|
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12378
diff
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|
1390 } |
| 5858 | 1391 |
|
12421
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|
1392 /* |
|
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|
1393 * If we're going to need to stat anything or we want to descend |
|
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Bruno Haible <bruno@clisp.org>
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diff
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|
1394 * and stay in the directory, chdir. If this fails we keep going, |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
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|
1395 * 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:
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diff
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|
1396 * 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>
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12378
diff
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|
1397 * names themselves. Note, that since fts_read won't be able to |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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12378
diff
changeset
|
1398 * 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
|
1399 * 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
|
1400 * 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:
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diff
changeset
|
1401 * post-order visit to return the error. There is a special case |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
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|
1402 * 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>
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12378
diff
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|
1403 * 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>
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diff
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|
1404 * 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
|
1405 * checking FTS_NS on the returned nodes. |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
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|
1406 */ |
|
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65fb6cc5f301
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Jim Meyering <meyering@redhat.com>
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diff
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|
1407 if (continue_readdir) |
|
65fb6cc5f301
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Jim Meyering <meyering@redhat.com>
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diff
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|
1408 { |
|
65fb6cc5f301
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Jim Meyering <meyering@redhat.com>
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diff
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|
1409 /* When resuming a short readdir run, we already have |
|
65fb6cc5f301
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Jim Meyering <meyering@redhat.com>
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changeset
|
1410 the required dirp and dir_fd. */ |
|
65fb6cc5f301
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|
1411 descend = true; |
|
65fb6cc5f301
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diff
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|
1412 } |
|
65fb6cc5f301
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Jim Meyering <meyering@redhat.com>
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diff
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|
1413 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
|
1414 if (ISSET(FTS_CWDFD)) |
|
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Use spaces for indentation, not tabs.
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|
1415 { |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
1416 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
|
1417 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
|
1418 set_cloexec_flag (dir_fd, true); |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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|
1419 } |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
1420 if (dir_fd < 0 || fts_safe_changedir(sp, cur, dir_fd, NULL)) { |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
1421 if (nlinks && type == BREAD) |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
1422 cur->fts_errno = errno; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
1423 cur->fts_flags |= FTS_DONTCHDIR; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
changeset
|
1424 descend = false; |
|
15529
894e5e6ae541
fts: add/use new struct member, fts_dirp
Jim Meyering <meyering@redhat.com>
parents:
15528
diff
changeset
|
1425 closedir_and_clear(cur->fts_dirp); |
|
12421
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Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
1426 if (ISSET(FTS_CWDFD) && 0 <= dir_fd) |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1427 close (dir_fd); |
|
15529
894e5e6ae541
fts: add/use new struct member, fts_dirp
Jim Meyering <meyering@redhat.com>
parents:
15528
diff
changeset
|
1428 cur->fts_dirp = NULL; |
|
12421
e8d2c6fc33ad
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Bruno Haible <bruno@clisp.org>
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diff
changeset
|
1429 } else |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
1430 descend = true; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
changeset
|
1431 } else |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
changeset
|
1432 descend = false; |
| 5858 | 1433 |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
1434 /* |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
1435 * 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:
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diff
changeset
|
1436 * current buffer -- the inner loop allocates more space as necessary. |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
changeset
|
1437 * 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
|
1438 * 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
|
1439 * 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
|
1440 * |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1441 * 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
|
1442 * each new component into the file name. |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1443 */ |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1444 len = NAPPEND(cur); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1445 if (ISSET(FTS_NOCHDIR)) { |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1446 cp = sp->fts_path + len; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1447 *cp++ = '/'; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1448 } else { |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1449 /* GCC, you're too verbose. */ |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1450 cp = NULL; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1451 } |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1452 len++; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1453 maxlen = sp->fts_pathlen - len; |
| 5858 | 1454 |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1455 level = cur->fts_level + 1; |
| 5858 | 1456 |
|
16235
18a38c9615f0
In commentary, do not use ` to quote.
Paul Eggert <eggert@cs.ucla.edu>
parents:
16201
diff
changeset
|
1457 /* 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
|
1458 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
|
1459 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
|
1460 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
|
1461 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
|
1462 while (cur->fts_dirp) { |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1463 bool is_dir; |
|
17640
aa5bda4ec2ae
fts: avoid unnecessary strlen calls
Bernhard Voelker <mail@bernhard-voelker.de>
parents:
17576
diff
changeset
|
1464 size_t d_namelen; |
|
18338
7276fe79480b
fts: handle readdir() errors
Pádraig Brady <P@draigBrady.com>
parents:
18325
diff
changeset
|
1465 __set_errno (0); |
|
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
|
1466 struct dirent *dp = readdir(cur->fts_dirp); |
|
18338
7276fe79480b
fts: handle readdir() errors
Pádraig Brady <P@draigBrady.com>
parents:
18325
diff
changeset
|
1467 if (dp == NULL) { |
|
7276fe79480b
fts: handle readdir() errors
Pádraig Brady <P@draigBrady.com>
parents:
18325
diff
changeset
|
1468 if (errno) { |
|
7276fe79480b
fts: handle readdir() errors
Pádraig Brady <P@draigBrady.com>
parents:
18325
diff
changeset
|
1469 cur->fts_errno = errno; |
|
7276fe79480b
fts: handle readdir() errors
Pádraig Brady <P@draigBrady.com>
parents:
18325
diff
changeset
|
1470 /* If we've not read any items yet, treat |
|
7276fe79480b
fts: handle readdir() errors
Pádraig Brady <P@draigBrady.com>
parents:
18325
diff
changeset
|
1471 the error as if we can't access the dir. */ |
|
7276fe79480b
fts: handle readdir() errors
Pádraig Brady <P@draigBrady.com>
parents:
18325
diff
changeset
|
1472 cur->fts_info = (continue_readdir || nitems) |
|
7276fe79480b
fts: handle readdir() errors
Pádraig Brady <P@draigBrady.com>
parents:
18325
diff
changeset
|
1473 ? FTS_ERR : FTS_DNR; |
|
7276fe79480b
fts: handle readdir() errors
Pádraig Brady <P@draigBrady.com>
parents:
18325
diff
changeset
|
1474 } |
|
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
|
1475 break; |
|
18338
7276fe79480b
fts: handle readdir() errors
Pádraig Brady <P@draigBrady.com>
parents:
18325
diff
changeset
|
1476 } |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1477 if (!ISSET(FTS_SEEDOT) && ISDOT(dp->d_name)) |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1478 continue; |
| 5858 | 1479 |
|
17641
019200939aa7
fts: avoid unnecessary strlen calls
Paul Eggert <eggert@cs.ucla.edu>
parents:
17640
diff
changeset
|
1480 d_namelen = _D_EXACT_NAMLEN (dp); |
|
019200939aa7
fts: avoid unnecessary strlen calls
Paul Eggert <eggert@cs.ucla.edu>
parents:
17640
diff
changeset
|
1481 p = fts_alloc (sp, dp->d_name, d_namelen); |
|
019200939aa7
fts: avoid unnecessary strlen calls
Paul Eggert <eggert@cs.ucla.edu>
parents:
17640
diff
changeset
|
1482 if (!p) |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1483 goto mem1; |
|
17640
aa5bda4ec2ae
fts: avoid unnecessary strlen calls
Bernhard Voelker <mail@bernhard-voelker.de>
parents:
17576
diff
changeset
|
1484 if (d_namelen >= maxlen) { |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1485 /* include space for NUL */ |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1486 oldaddr = sp->fts_path; |
|
17640
aa5bda4ec2ae
fts: avoid unnecessary strlen calls
Bernhard Voelker <mail@bernhard-voelker.de>
parents:
17576
diff
changeset
|
1487 if (! fts_palloc(sp, d_namelen + len + 1)) { |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1488 /* |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1489 * No more memory. Save |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1490 * errno, free up the current structure and the |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1491 * structures already allocated. |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1492 */ |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1493 mem1: saved_errno = errno; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1494 free(p); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1495 fts_lfree(head); |
|
15529
894e5e6ae541
fts: add/use new struct member, fts_dirp
Jim Meyering <meyering@redhat.com>
parents:
15528
diff
changeset
|
1496 closedir_and_clear(cur->fts_dirp); |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1497 cur->fts_info = FTS_ERR; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1498 SET(FTS_STOP); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1499 __set_errno (saved_errno); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1500 return (NULL); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1501 } |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1502 /* Did realloc() change the pointer? */ |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1503 if (oldaddr != sp->fts_path) { |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1504 doadjust = true; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1505 if (ISSET(FTS_NOCHDIR)) |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1506 cp = sp->fts_path + len; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1507 } |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1508 maxlen = sp->fts_pathlen - len; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1509 } |
| 5858 | 1510 |
|
17640
aa5bda4ec2ae
fts: avoid unnecessary strlen calls
Bernhard Voelker <mail@bernhard-voelker.de>
parents:
17576
diff
changeset
|
1511 new_len = len + d_namelen; |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1512 if (new_len < len) { |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1513 /* |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1514 * 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
|
1515 * 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
|
1516 * the current structure and the structures already |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1517 * allocated, then error out with ENAMETOOLONG. |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1518 */ |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1519 free(p); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1520 fts_lfree(head); |
|
15529
894e5e6ae541
fts: add/use new struct member, fts_dirp
Jim Meyering <meyering@redhat.com>
parents:
15528
diff
changeset
|
1521 closedir_and_clear(cur->fts_dirp); |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1522 cur->fts_info = FTS_ERR; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1523 SET(FTS_STOP); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1524 __set_errno (ENAMETOOLONG); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1525 return (NULL); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1526 } |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1527 p->fts_level = level; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1528 p->fts_parent = sp->fts_cur; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1529 p->fts_pathlen = new_len; |
| 5858 | 1530 |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1531 /* 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
|
1532 entries before processing them. */ |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1533 p->fts_statp->st_ino = D_INO (dp); |
| 5858 | 1534 |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1535 /* 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
|
1536 if (ISSET(FTS_NOCHDIR)) { |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1537 p->fts_accpath = p->fts_path; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1538 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
|
1539 } else |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1540 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
|
1541 |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1542 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
|
1543 /* 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
|
1544 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
|
1545 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
|
1546 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
|
1547 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
|
1548 symlinks (FTS_PHYSICAL) and d_type indicates this |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1549 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
|
1550 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
|
1551 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
|
1552 inode numbers. Some day we might optimize that |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1553 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
|
1554 be valid. */ |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1555 bool skip_stat = (ISSET(FTS_PHYSICAL) |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1556 && ISSET(FTS_NOSTAT) |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1557 && DT_IS_KNOWN(dp) |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1558 && ! DT_MUST_BE(dp, DT_DIR)); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1559 p->fts_info = FTS_NSOK; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1560 /* Propagate dirent.d_type information back |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1561 to caller, when possible. */ |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1562 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
|
1563 fts_set_stat_required(p, !skip_stat); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1564 is_dir = (ISSET(FTS_PHYSICAL) |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1565 && DT_MUST_BE(dp, DT_DIR)); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1566 } else { |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1567 p->fts_info = fts_stat(sp, p, false); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1568 is_dir = (p->fts_info == FTS_D |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1569 || p->fts_info == FTS_DC |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1570 || p->fts_info == FTS_DOT); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1571 } |
| 5858 | 1572 |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1573 /* Decrement link count if applicable. */ |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1574 if (nlinks > 0 && is_dir) |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1575 nlinks -= nostat; |
| 5858 | 1576 |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1577 /* 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
|
1578 p->fts_link = NULL; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1579 if (head == NULL) |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1580 head = tail = p; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1581 else { |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1582 tail->fts_link = p; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1583 tail = p; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1584 } |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1585 ++nitems; |
|
15531
65fb6cc5f301
fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents:
15530
diff
changeset
|
1586 if (max_entries <= nitems) { |
|
65fb6cc5f301
fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents:
15530
diff
changeset
|
1587 /* 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
|
1588 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
|
1589 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
|
1590 goto break_without_closedir; |
|
65fb6cc5f301
fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents:
15530
diff
changeset
|
1591 } |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1592 } |
|
15531
65fb6cc5f301
fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents:
15530
diff
changeset
|
1593 |
|
15529
894e5e6ae541
fts: add/use new struct member, fts_dirp
Jim Meyering <meyering@redhat.com>
parents:
15528
diff
changeset
|
1594 if (cur->fts_dirp) |
|
894e5e6ae541
fts: add/use new struct member, fts_dirp
Jim Meyering <meyering@redhat.com>
parents:
15528
diff
changeset
|
1595 closedir_and_clear(cur->fts_dirp); |
| 5858 | 1596 |
|
15531
65fb6cc5f301
fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents:
15530
diff
changeset
|
1597 break_without_closedir: |
|
65fb6cc5f301
fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents:
15530
diff
changeset
|
1598 |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1599 /* |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1600 * 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
|
1601 * 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
|
1602 */ |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1603 if (doadjust) |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1604 fts_padjust(sp, head); |
| 5858 | 1605 |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1606 /* |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1607 * 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
|
1608 * state. |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1609 */ |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1610 if (ISSET(FTS_NOCHDIR)) { |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1611 if (len == sp->fts_pathlen || nitems == 0) |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1612 --cp; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1613 *cp = '\0'; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1614 } |
| 5858 | 1615 |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1616 /* |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1617 * 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
|
1618 * 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
|
1619 * 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
|
1620 * 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
|
1621 * can't get back, we're done. |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1622 */ |
|
15531
65fb6cc5f301
fts: do not exhaust memory when processing million-entry directories
Jim Meyering <meyering@redhat.com>
parents:
15530
diff
changeset
|
1623 if (!continue_readdir && descend && (type == BCHILD || !nitems) && |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1624 (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
|
1625 ? restore_initial_cwd(sp) |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1626 : fts_safe_changedir(sp, cur->fts_parent, -1, ".."))) { |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1627 cur->fts_info = FTS_ERR; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1628 SET(FTS_STOP); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1629 fts_lfree(head); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1630 return (NULL); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1631 } |
| 5858 | 1632 |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1633 /* If didn't find anything, return NULL. */ |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1634 if (!nitems) { |
|
18338
7276fe79480b
fts: handle readdir() errors
Pádraig Brady <P@draigBrady.com>
parents:
18325
diff
changeset
|
1635 if (type == BREAD |
|
7276fe79480b
fts: handle readdir() errors
Pádraig Brady <P@draigBrady.com>
parents:
18325
diff
changeset
|
1636 && cur->fts_info != FTS_DNR && cur->fts_info != FTS_ERR) |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1637 cur->fts_info = FTS_DP; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1638 fts_lfree(head); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1639 return (NULL); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1640 } |
| 5858 | 1641 |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1642 /* 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
|
1643 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
|
1644 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
|
1645 inode numbers. */ |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1646 if (nitems > _FTS_INODE_SORT_DIR_ENTRIES_THRESHOLD |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1647 && !sp->fts_compar |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1648 && ISSET (FTS_CWDFD) |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1649 && 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
|
1650 sp->fts_compar = fts_compare_ino; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1651 head = fts_sort (sp, head, nitems); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1652 sp->fts_compar = NULL; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1653 } |
|
10481
47fe4e48e158
fts: sort dirent entries on inode number before traversing
Jim Meyering <meyering@redhat.com>
parents:
9718
diff
changeset
|
1654 |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1655 /* Sort the entries. */ |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1656 if (sp->fts_compar && nitems > 1) |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1657 head = fts_sort(sp, head, nitems); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1658 return (head); |
| 5858 | 1659 } |
| 1660 | |
| 1661 #if FTS_DEBUG | |
| 1662 | |
| 1663 /* Walk ->fts_parent links starting at E_CURR, until the root of the | |
| 1664 current hierarchy. There should be a directory with dev/inode | |
| 1665 matching those of AD. If not, print a lot of diagnostics. */ | |
| 1666 static void | |
| 1667 find_matching_ancestor (FTSENT const *e_curr, struct Active_dir const *ad) | |
| 1668 { | |
| 1669 FTSENT const *ent; | |
| 1670 for (ent = e_curr; ent->fts_level >= FTS_ROOTLEVEL; ent = ent->fts_parent) | |
| 1671 { | |
| 1672 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
|
1673 && ad->dev == ent->fts_statp->st_dev) |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1674 return; |
| 5858 | 1675 } |
| 1676 printf ("ERROR: tree dir, %s, not active\n", ad->fts_ent->fts_accpath); | |
| 1677 printf ("active dirs:\n"); | |
| 1678 for (ent = e_curr; | |
| 1679 ent->fts_level >= FTS_ROOTLEVEL; ent = ent->fts_parent) | |
| 1680 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
|
1681 ad->fts_ent->fts_accpath, |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1682 (uintmax_t) ad->dev, |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1683 (uintmax_t) ad->ino, |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1684 ent->fts_accpath, |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1685 (uintmax_t) ent->fts_statp->st_dev, |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1686 (uintmax_t) ent->fts_statp->st_ino); |
| 5858 | 1687 } |
| 1688 | |
| 1689 void | |
| 1690 fts_cross_check (FTS const *sp) | |
| 1691 { | |
| 1692 FTSENT const *ent = sp->fts_cur; | |
| 1693 FTSENT const *t; | |
| 1694 if ( ! ISSET (FTS_TIGHT_CYCLE_CHECK)) | |
| 1695 return; | |
| 1696 | |
| 1697 Dprintf (("fts-cross-check cur=%s\n", ent->fts_path)); | |
| 1698 /* Make sure every parent dir is in the tree. */ | |
| 1699 for (t = ent->fts_parent; t->fts_level >= FTS_ROOTLEVEL; t = t->fts_parent) | |
| 1700 { | |
| 1701 struct Active_dir ad; | |
| 1702 ad.ino = t->fts_statp->st_ino; | |
| 1703 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
|
1704 if ( ! hash_lookup (sp->fts_cycle.ht, &ad)) |
|
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Use spaces for indentation, not tabs.
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|
1705 printf ("ERROR: active dir, %s, not in tree\n", t->fts_path); |
| 5858 | 1706 } |
| 1707 | |
| 1708 /* Make sure every dir in the tree is an active dir. | |
| 1709 But ENT is not necessarily a directory. If so, just skip this part. */ | |
| 1710 if (ent->fts_parent->fts_level >= FTS_ROOTLEVEL | |
| 1711 && (ent->fts_info == FTS_DP | |
|
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|
1712 || ent->fts_info == FTS_D)) |
| 5858 | 1713 { |
| 1714 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
|
1715 for (ad = hash_get_first (sp->fts_cycle.ht); ad != NULL; |
|
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|
1716 ad = hash_get_next (sp->fts_cycle.ht, ad)) |
|
e8d2c6fc33ad
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|
1717 { |
|
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Use spaces for indentation, not tabs.
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|
1718 find_matching_ancestor (ent, ad); |
|
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|
1719 } |
| 5858 | 1720 } |
| 1721 } | |
|
7639
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Make fts (in FTS_CWDFD mode) more efficient by caching a few open
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|
1722 |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
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|
1723 static bool |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
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|
1724 same_fd (int fd1, int fd2) |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
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|
1725 { |
|
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Make fts (in FTS_CWDFD mode) more efficient by caching a few open
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|
1726 struct stat sb1, sb2; |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
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|
1727 return (fstat (fd1, &sb1) == 0 |
|
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|
1728 && fstat (fd2, &sb2) == 0 |
|
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|
1729 && SAME_INODE (sb1, sb2)); |
|
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Make fts (in FTS_CWDFD mode) more efficient by caching a few open
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|
1730 } |
|
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Make fts (in FTS_CWDFD mode) more efficient by caching a few open
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|
1731 |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
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|
1732 static void |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
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|
1733 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>
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|
1734 { |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
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|
1735 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>
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|
1736 unsigned int i = fd_ring->fts_front; |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
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|
1737 char *cwd = getcwdat (sp->fts_cwd_fd, NULL, 0); |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
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|
1738 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>
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|
1739 free (cwd); |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
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|
1740 if (i_ring_empty (fd_ring)) |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
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|
1741 return; |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
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|
1742 |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
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|
1743 while (true) |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
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|
1744 { |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
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|
1745 int fd = fd_ring->fts_fd_ring[i]; |
|
1670d42131d7
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|
1746 if (fd < 0) |
|
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|
1747 fprintf (stream, "%d: %d:\n", i, fd); |
|
7639
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|
1748 else |
|
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|
1749 { |
|
e8d2c6fc33ad
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|
1750 char *wd = getcwdat (fd, NULL, 0); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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|
1751 fprintf (stream, "%d: %d: %s\n", i, fd, wd); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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|
1752 free (wd); |
|
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|
1753 } |
|
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|
1754 if (i == fd_ring->fts_back) |
|
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|
1755 break; |
|
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Make fts (in FTS_CWDFD mode) more efficient by caching a few open
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|
1756 i = (i + I_RING_SIZE - 1) % I_RING_SIZE; |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
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|
1757 } |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
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|
1758 } |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
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|
1759 |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
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|
1760 /* 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
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|
1761 parent, grandparent, etc. of the current working directory. */ |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
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|
1762 static void |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
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|
1763 fd_ring_check (FTS const *sp) |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
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|
1764 { |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
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|
1765 if (!fts_debug) |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
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|
1766 return; |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
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|
1767 |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
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|
1768 /* Make a writable copy. */ |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
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|
1769 I_ring fd_w = sp->fts_fd_ring; |
|
1670d42131d7
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|
1770 |
|
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|
1771 int cwd_fd = sp->fts_cwd_fd; |
|
1670d42131d7
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|
1772 cwd_fd = dup (cwd_fd); |
|
1670d42131d7
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|
1773 char *dot = getcwdat (cwd_fd, NULL, 0); |
|
1670d42131d7
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|
1774 error (0, 0, "===== check ===== cwd: %s", dot); |
|
1670d42131d7
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|
1775 free (dot); |
|
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|
1776 while ( ! i_ring_empty (&fd_w)) |
|
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|
1777 { |
|
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|
1778 int fd = i_ring_pop (&fd_w); |
|
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|
1779 if (0 <= fd) |
|
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|
1780 { |
|
15374
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|
1781 int parent_fd = openat (cwd_fd, "..", O_SEARCH | O_NOATIME); |
|
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|
1782 if (parent_fd < 0) |
|
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|
1783 { |
|
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|
1784 // Warn? |
|
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|
1785 break; |
|
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1786 } |
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1787 if (!same_fd (fd, parent_fd)) |
|
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1788 { |
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1789 char *cwd = getcwdat (fd, NULL, 0); |
|
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|
1790 error (0, errno, "ring : %s", cwd); |
|
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1791 char *c2 = getcwdat (parent_fd, NULL, 0); |
|
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|
1792 error (0, errno, "parent: %s", c2); |
|
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1793 free (cwd); |
|
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|
1794 free (c2); |
|
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|
1795 fts_assert (0); |
|
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1796 } |
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|
1797 close (cwd_fd); |
|
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|
1798 cwd_fd = parent_fd; |
|
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1799 } |
|
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|
1800 } |
|
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|
1801 close (cwd_fd); |
|
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1802 } |
| 5858 | 1803 #endif |
| 1804 | |
| 1805 static unsigned short int | |
| 1806 internal_function | |
| 1807 fts_stat(FTS *sp, register FTSENT *p, bool follow) | |
| 1808 { | |
|
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|
1809 struct stat *sbp = p->fts_statp; |
|
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|
1810 int saved_errno; |
| 5858 | 1811 |
|
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|
1812 if (p->fts_level == FTS_ROOTLEVEL && ISSET(FTS_COMFOLLOW)) |
|
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|
1813 follow = true; |
|
7482
26914593f079
Big performance improvement for fts-based tools that use FTS_NOSTAT.
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|
1814 |
|
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|
1815 /* |
|
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|
1816 * If doing a logical walk, or application requested FTS_FOLLOW, do |
|
e8d2c6fc33ad
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|
1817 * a stat(2). If that fails, check for a non-existent symlink. If |
|
e8d2c6fc33ad
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|
1818 * fail, set the errno from the stat call. |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
1819 */ |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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12378
diff
changeset
|
1820 if (ISSET(FTS_LOGICAL) || follow) { |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1821 if (stat(p->fts_accpath, sbp)) { |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1822 saved_errno = errno; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1823 if (errno == ENOENT |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1824 && lstat(p->fts_accpath, sbp) == 0) { |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1825 __set_errno (0); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1826 return (FTS_SLNONE); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1827 } |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1828 p->fts_errno = saved_errno; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1829 goto err; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1830 } |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1831 } 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
|
1832 AT_SYMLINK_NOFOLLOW)) { |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1833 p->fts_errno = errno; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1834 err: memset(sbp, 0, sizeof(struct stat)); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1835 return (FTS_NS); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1836 } |
| 5858 | 1837 |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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12378
diff
changeset
|
1838 if (S_ISDIR(sbp->st_mode)) { |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1839 p->fts_n_dirs_remaining = (sbp->st_nlink |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1840 - (ISSET(FTS_SEEDOT) ? 0 : 2)); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1841 if (ISDOT(p->fts_name)) { |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1842 /* Command-line "." and ".." are real directories. */ |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1843 return (p->fts_level == FTS_ROOTLEVEL ? FTS_D : FTS_DOT); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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12378
diff
changeset
|
1844 } |
| 5872 | 1845 |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1846 return (FTS_D); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
changeset
|
1847 } |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1848 if (S_ISLNK(sbp->st_mode)) |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1849 return (FTS_SL); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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12378
diff
changeset
|
1850 if (S_ISREG(sbp->st_mode)) |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
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|
1851 return (FTS_F); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
changeset
|
1852 return (FTS_DEFAULT); |
| 5858 | 1853 } |
| 1854 | |
| 1855 static int | |
| 1856 fts_compar (void const *a, void const *b) | |
| 1857 { | |
| 1858 /* Convert A and B to the correct types, to pacify the compiler, and | |
| 1859 for portability to bizarre hosts where "void const *" and "FTSENT | |
| 1860 const **" differ in runtime representation. The comparison | |
| 1861 function cannot modify *a and *b, but there is no compile-time | |
| 1862 check for this. */ | |
| 1863 FTSENT const **pa = (FTSENT const **) a; | |
| 1864 FTSENT const **pb = (FTSENT const **) b; | |
| 1865 return pa[0]->fts_fts->fts_compar (pa, pb); | |
| 1866 } | |
| 1867 | |
| 1868 static FTSENT * | |
| 1869 internal_function | |
| 1870 fts_sort (FTS *sp, FTSENT *head, register size_t nitems) | |
| 1871 { | |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
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|
1872 register FTSENT **ap, *p; |
| 5858 | 1873 |
|
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Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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12378
diff
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|
1874 /* On most modern hosts, void * and FTSENT ** have the same |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
1875 run-time representation, and one can convert sp->fts_compar to |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
changeset
|
1876 the type qsort expects without problem. Use the heuristic that |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
1877 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>
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diff
changeset
|
1878 converting FTSENT ** to long int is the same as converting |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
1879 FTSENT ** to void * and then to long int. This heuristic isn't |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
1880 valid in general but we don't know of any counterexamples. */ |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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|
1881 FTSENT *dummy; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
1882 int (*compare) (void const *, void const *) = |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
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|
1883 ((sizeof &dummy == sizeof (void *) |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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diff
changeset
|
1884 && (long int) &dummy == (long int) (void *) &dummy) |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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|
1885 ? (int (*) (void const *, void const *)) sp->fts_compar |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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|
1886 : fts_compar); |
| 5858 | 1887 |
|
12421
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|
1888 /* |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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diff
changeset
|
1889 * Construct an array of pointers to the structures and call qsort(3). |
|
e8d2c6fc33ad
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changeset
|
1890 * Reassemble the array in the order returned by qsort. If unable to |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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diff
changeset
|
1891 * sort for memory reasons, return the directory entries in their |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
1892 * current order. Allocate enough space for the current needs plus |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
1893 * 40 so don't realloc one entry at a time. |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
1894 */ |
|
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Use spaces for indentation, not tabs.
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diff
changeset
|
1895 if (nitems > sp->fts_nitems) { |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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diff
changeset
|
1896 FTSENT **a; |
| 5858 | 1897 |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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diff
changeset
|
1898 sp->fts_nitems = nitems + 40; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
changeset
|
1899 if (SIZE_MAX / sizeof *a < sp->fts_nitems |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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diff
changeset
|
1900 || ! (a = realloc (sp->fts_array, |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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diff
changeset
|
1901 sp->fts_nitems * sizeof *a))) { |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
1902 free(sp->fts_array); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
1903 sp->fts_array = NULL; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
1904 sp->fts_nitems = 0; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
1905 return (head); |
|
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Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
1906 } |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
1907 sp->fts_array = a; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
1908 } |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
1909 for (ap = sp->fts_array, p = head; p; p = p->fts_link) |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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diff
changeset
|
1910 *ap++ = p; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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diff
changeset
|
1911 qsort((void *)sp->fts_array, nitems, sizeof(FTSENT *), compare); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
1912 for (head = *(ap = sp->fts_array); --nitems; ++ap) |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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diff
changeset
|
1913 ap[0]->fts_link = ap[1]; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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diff
changeset
|
1914 ap[0]->fts_link = NULL; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
1915 return (head); |
| 5858 | 1916 } |
| 1917 | |
| 1918 static FTSENT * | |
| 1919 internal_function | |
| 1920 fts_alloc (FTS *sp, const char *name, register size_t namelen) | |
| 1921 { | |
|
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Use spaces for indentation, not tabs.
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diff
changeset
|
1922 register FTSENT *p; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
1923 size_t len; |
| 5858 | 1924 |
|
12421
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Use spaces for indentation, not tabs.
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diff
changeset
|
1925 /* |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
1926 * The file name is a variable length array. Allocate the FTSENT |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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diff
changeset
|
1927 * structure and the file name in one chunk. |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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diff
changeset
|
1928 */ |
|
18403
4434607ac1ce
flexmember: port better to GCC + valgrind
Paul Eggert <eggert@cs.ucla.edu>
parents:
18338
diff
changeset
|
1929 len = FLEXSIZEOF(FTSENT, fts_name, namelen + 1); |
|
12421
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Use spaces for indentation, not tabs.
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diff
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|
1930 if ((p = malloc(len)) == NULL) |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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diff
changeset
|
1931 return (NULL); |
| 5858 | 1932 |
|
12421
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diff
changeset
|
1933 /* 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
|
1934 memcpy(p->fts_name, name, namelen); |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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diff
changeset
|
1935 p->fts_name[namelen] = '\0'; |
| 5858 | 1936 |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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diff
changeset
|
1937 p->fts_namelen = namelen; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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diff
changeset
|
1938 p->fts_fts = sp; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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diff
changeset
|
1939 p->fts_path = sp->fts_path; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
1940 p->fts_errno = 0; |
|
15529
894e5e6ae541
fts: add/use new struct member, fts_dirp
Jim Meyering <meyering@redhat.com>
parents:
15528
diff
changeset
|
1941 p->fts_dirp = NULL; |
|
12421
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Use spaces for indentation, not tabs.
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diff
changeset
|
1942 p->fts_flags = 0; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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12378
diff
changeset
|
1943 p->fts_instr = FTS_NOINSTR; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1944 p->fts_number = 0; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
1945 p->fts_pointer = NULL; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
1946 return (p); |
| 5858 | 1947 } |
| 1948 | |
| 1949 static void | |
| 1950 internal_function | |
| 1951 fts_lfree (register FTSENT *head) | |
| 1952 { | |
|
12421
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Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
1953 register FTSENT *p; |
| 5858 | 1954 |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
1955 /* Free a linked list of structures. */ |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
1956 while ((p = head)) { |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
1957 head = head->fts_link; |
|
15529
894e5e6ae541
fts: add/use new struct member, fts_dirp
Jim Meyering <meyering@redhat.com>
parents:
15528
diff
changeset
|
1958 if (p->fts_dirp) |
|
894e5e6ae541
fts: add/use new struct member, fts_dirp
Jim Meyering <meyering@redhat.com>
parents:
15528
diff
changeset
|
1959 closedir (p->fts_dirp); |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
1960 free(p); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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parents:
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diff
changeset
|
1961 } |
| 5858 | 1962 } |
| 1963 | |
| 1964 /* | |
| 5907 | 1965 * Allow essentially unlimited file name lengths; find, rm, ls should |
| 1966 * all work on any tree. Most systems will allow creation of file | |
| 1967 * names much longer than MAXPATHLEN, even though the kernel won't | |
| 1968 * resolve them. Add the size (not just what's needed) plus 256 bytes | |
| 1969 * so don't realloc the file name 2 bytes at a time. | |
| 5858 | 1970 */ |
| 1971 static bool | |
| 1972 internal_function | |
| 1973 fts_palloc (FTS *sp, size_t more) | |
| 1974 { | |
|
12421
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Use spaces for indentation, not tabs.
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diff
changeset
|
1975 char *p; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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diff
changeset
|
1976 size_t new_len = sp->fts_pathlen + more + 256; |
| 5858 | 1977 |
|
12421
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Use spaces for indentation, not tabs.
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diff
changeset
|
1978 /* |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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diff
changeset
|
1979 * See if fts_pathlen would overflow. |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
1980 */ |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
1981 if (new_len < sp->fts_pathlen) { |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
1982 free(sp->fts_path); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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diff
changeset
|
1983 sp->fts_path = NULL; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
1984 __set_errno (ENAMETOOLONG); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
changeset
|
1985 return false; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
changeset
|
1986 } |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1987 sp->fts_pathlen = new_len; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
changeset
|
1988 p = realloc(sp->fts_path, sp->fts_pathlen); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1989 if (p == NULL) { |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1990 free(sp->fts_path); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
changeset
|
1991 sp->fts_path = NULL; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
changeset
|
1992 return false; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
changeset
|
1993 } |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
1994 sp->fts_path = p; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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parents:
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diff
changeset
|
1995 return true; |
| 5858 | 1996 } |
| 1997 | |
| 1998 /* | |
| 5907 | 1999 * When the file name is realloc'd, have to fix all of the pointers in |
| 2000 * structures already returned. | |
| 5858 | 2001 */ |
| 2002 static void | |
| 2003 internal_function | |
| 2004 fts_padjust (FTS *sp, FTSENT *head) | |
| 2005 { | |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
changeset
|
2006 FTSENT *p; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
changeset
|
2007 char *addr = sp->fts_path; |
| 5858 | 2008 |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
changeset
|
2009 #define ADJUST(p) do { \ |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
changeset
|
2010 if ((p)->fts_accpath != (p)->fts_name) { \ |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
2011 (p)->fts_accpath = \ |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
2012 (char *)addr + ((p)->fts_accpath - (p)->fts_path); \ |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
changeset
|
2013 } \ |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
2014 (p)->fts_path = addr; \ |
| 5858 | 2015 } while (0) |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
2016 /* Adjust the current set of children. */ |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
2017 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
|
2018 ADJUST(p); |
| 5858 | 2019 |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
2020 /* 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
|
2021 for (p = head; p->fts_level >= FTS_ROOTLEVEL;) { |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
2022 ADJUST(p); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
2023 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
|
2024 } |
| 5858 | 2025 } |
| 2026 | |
| 2027 static size_t | |
|
16128
6beadb731202
mark functions with const and pure attributes
Jim Meyering <meyering@redhat.com>
parents:
15988
diff
changeset
|
2028 internal_function _GL_ATTRIBUTE_PURE |
| 5858 | 2029 fts_maxarglen (char * const *argv) |
| 2030 { | |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
2031 size_t len, max; |
| 5858 | 2032 |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
2033 for (max = 0; *argv; ++argv) |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
2034 if ((len = strlen(*argv)) > max) |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
2035 max = len; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
2036 return (max + 1); |
| 5858 | 2037 } |
| 2038 | |
| 2039 /* | |
| 5907 | 2040 * Change to dir specified by fd or file name without getting |
| 5858 | 2041 * tricked by someone changing the world out from underneath us. |
| 2042 * Assumes p->fts_statp->st_dev and p->fts_statp->st_ino are filled in. | |
| 7151 | 2043 * 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
|
2044 * and to be closed eventually. So don't pass e.g., 'dirfd(dirp)' and then |
| 7151 | 2045 * do closedir(dirp), because that would invalidate the saved FD. |
| 2046 * Upon failure, close FD immediately and return nonzero. | |
| 5858 | 2047 */ |
| 2048 static int | |
| 2049 internal_function | |
| 5907 | 2050 fts_safe_changedir (FTS *sp, FTSENT *p, int fd, char const *dir) |
| 5858 | 2051 { |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
2052 int ret; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
2053 bool is_dotdot = dir && STREQ (dir, ".."); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
2054 int newfd; |
|
7623
5bfad7d666d6
* lib/fts.c (fts_safe_changedir): Add a comment.
Jim Meyering <jim@meyering.net>
parents:
7621
diff
changeset
|
2055 |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
2056 /* 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
|
2057 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
|
2058 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
|
2059 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
|
2060 if (ISSET (FTS_NOCHDIR)) |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
2061 { |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
2062 if (ISSET (FTS_CWDFD) && 0 <= fd) |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
2063 close (fd); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
2064 return 0; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
2065 } |
| 5858 | 2066 |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
2067 if (fd < 0 && is_dotdot && ISSET (FTS_CWDFD)) |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
2068 { |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
2069 /* 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
|
2070 comparison. I.e., when changing to parent directory |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
2071 (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
|
2072 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
|
2073 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
|
2074 if ( ! i_ring_empty (&sp->fts_fd_ring)) |
|
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 int parent_fd; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
2077 fd_ring_print (sp, stderr, "pre-pop"); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
2078 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
|
2079 is_dotdot = true; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
2080 if (0 <= parent_fd) |
|
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 fd = parent_fd; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
2083 dir = NULL; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
2084 } |
|
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 } |
|
7639
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
2087 |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
2088 newfd = fd; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
2089 if (fd < 0 && (newfd = diropen (sp, dir)) < 0) |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
2090 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
|
2091 |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
2092 /* 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
|
2093 "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
|
2094 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
|
2095 (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
|
2096 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
|
2097 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
|
2098 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
|
2099 if (ISSET(FTS_LOGICAL) || ! HAVE_WORKING_O_NOFOLLOW |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
2100 || (dir && STREQ (dir, ".."))) |
|
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 struct stat sb; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
2103 if (fstat(newfd, &sb)) |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
2104 { |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
2105 ret = -1; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
2106 goto bail; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
2107 } |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
2108 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
|
2109 || p->fts_statp->st_ino != sb.st_ino) |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
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2110 { |
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e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
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2111 __set_errno (ENOENT); /* disinformation */ |
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e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
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2112 ret = -1; |
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e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
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2113 goto bail; |
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e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
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2114 } |
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e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
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2115 } |
| 7151 | 2116 |
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12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
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2117 if (ISSET(FTS_CWDFD)) |
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e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
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2118 { |
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e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
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2119 cwd_advance_fd (sp, newfd, ! is_dotdot); |
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e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
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2120 return 0; |
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e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
2121 } |
| 7151 | 2122 |
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12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
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2123 ret = fchdir(newfd); |
| 5858 | 2124 bail: |
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12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
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2125 if (fd < 0) |
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e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
2126 { |
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e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
2127 int oerrno = errno; |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
2128 (void)close(newfd); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
2129 __set_errno (oerrno); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
2130 } |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
2131 return ret; |
| 5858 | 2132 } |