Mercurial > gnulib
annotate lib/fts.c @ 13091:3af48780d248
Remove vestiges of fts-lgpl module.
author | Bruno Haible <bruno@clisp.org> |
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date | Mon, 29 Mar 2010 10:41:20 +0200 |
parents | 2ea3e3fab7ee |
children | acc972b5da60 |
rev | line source |
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5858 | 1 /* Traverse a file hierarchy. |
2 | |
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update nearly all FSF copyright year lists to include 2010
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3 Copyright (C) 2004-2010 Free Software Foundation, Inc. |
5858 | 4 |
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Change copyright notice from GPLv2+ to GPLv3+.
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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 * | |
34 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
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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* _fpending.c: Include <config.h> unconditionally, since we no
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47 #include <config.h> |
5858 | 48 |
49 #if defined(LIBC_SCCS) && !defined(lint) | |
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50 static char sccsid[] = "@(#)fts.c 8.6 (Berkeley) 8/14/94"; |
5858 | 51 #endif /* LIBC_SCCS and not lint */ |
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 <stdbool.h> |
5858 | 66 #include <stdlib.h> |
67 #include <string.h> | |
68 #include <unistd.h> | |
69 | |
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70 #if ! _LIBC |
7151 | 71 # include "fcntl--.h" |
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72 # include "dirent--.h" |
7151 | 73 # include "unistd--.h" |
11940 | 74 /* FIXME - use fcntl(F_DUPFD_CLOEXEC)/openat(O_CLOEXEC) once they are |
75 supported. */ | |
76 # include "cloexec.h" | |
11946 | 77 # include "openat.h" |
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78 # include "same-inode.h" |
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79 #endif |
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80 |
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81 #include <dirent.h> |
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82 #ifndef _D_EXACT_NAMLEN |
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83 # define _D_EXACT_NAMLEN(dirent) strlen ((dirent)->d_name) |
5858 | 84 #endif |
85 | |
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86 #if HAVE_STRUCT_DIRENT_D_TYPE |
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87 /* True if the type of the directory entry D is known. */ |
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88 # define DT_IS_KNOWN(d) ((d)->d_type != DT_UNKNOWN) |
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89 /* True if the type of the directory entry D must be T. */ |
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90 # define DT_MUST_BE(d, t) ((d)->d_type == (t)) |
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91 # define D_TYPE(d) ((d)->d_type) |
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92 #else |
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93 # define DT_IS_KNOWN(d) false |
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94 # define DT_MUST_BE(d, t) false |
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95 # define D_TYPE(d) DT_UNKNOWN |
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96 |
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97 # undef DT_UNKNOWN |
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98 # define DT_UNKNOWN 0 |
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99 |
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100 /* Any nonzero values will do here, so long as they're distinct. |
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101 Undef any existing macros out of the way. */ |
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102 # undef DT_BLK |
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103 # undef DT_CHR |
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104 # undef DT_DIR |
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105 # undef DT_FIFO |
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106 # undef DT_LNK |
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107 # undef DT_REG |
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108 # undef DT_SOCK |
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109 # define DT_BLK 1 |
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110 # define DT_CHR 2 |
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111 # define DT_DIR 3 |
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112 # define DT_FIFO 4 |
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113 # define DT_LNK 5 |
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114 # define DT_REG 6 |
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115 # define DT_SOCK 7 |
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116 #endif |
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117 |
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118 #ifndef S_IFLNK |
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119 # define S_IFLNK 0 |
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120 #endif |
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121 #ifndef S_IFSOCK |
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122 # define S_IFSOCK 0 |
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123 #endif |
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124 |
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125 enum |
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126 { |
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127 NOT_AN_INODE_NUMBER = 0 |
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128 }; |
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129 |
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130 #ifdef D_INO_IN_DIRENT |
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131 # define D_INO(dp) (dp)->d_ino |
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132 #else |
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133 /* Some systems don't have inodes, so fake them to avoid lots of ifdefs. */ |
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134 # define D_INO(dp) NOT_AN_INODE_NUMBER |
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135 #endif |
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136 |
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137 /* If there are more than this many entries in a directory, |
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138 and the conditions mentioned below are satisfied, then sort |
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139 the entries on inode number before any further processing. */ |
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140 #ifndef FTS_INODE_SORT_DIR_ENTRIES_THRESHOLD |
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141 # define FTS_INODE_SORT_DIR_ENTRIES_THRESHOLD 10000 |
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142 #endif |
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143 enum |
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144 { |
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145 _FTS_INODE_SORT_DIR_ENTRIES_THRESHOLD = FTS_INODE_SORT_DIR_ENTRIES_THRESHOLD |
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146 }; |
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147 |
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148 enum Fts_stat |
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149 { |
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150 FTS_NO_STAT_REQUIRED = 1, |
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151 FTS_STAT_REQUIRED = 2 |
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152 }; |
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153 |
5858 | 154 #ifdef _LIBC |
155 # undef close | |
156 # define close __close | |
157 # undef closedir | |
158 # define closedir __closedir | |
159 # undef fchdir | |
160 # define fchdir __fchdir | |
161 # undef open | |
162 # define open __open | |
163 # undef opendir | |
164 # define opendir __opendir | |
165 # undef readdir | |
166 # define readdir __readdir | |
167 #else | |
168 # undef internal_function | |
169 # define internal_function /* empty */ | |
170 #endif | |
171 | |
172 #ifndef __set_errno | |
173 # define __set_errno(Val) errno = (Val) | |
174 #endif | |
175 | |
7151 | 176 /* If this host provides the openat function, then we can avoid |
177 attempting to open "." in some initialization code below. */ | |
178 #ifdef HAVE_OPENAT | |
179 # define HAVE_OPENAT_SUPPORT 1 | |
180 #else | |
181 # define HAVE_OPENAT_SUPPORT 0 | |
182 #endif | |
5858 | 183 |
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184 #ifdef NDEBUG |
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185 # define fts_assert(expr) ((void) 0) |
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186 #else |
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187 # define fts_assert(expr) \ |
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188 do \ |
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189 { \ |
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190 if (!(expr)) \ |
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191 abort (); \ |
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192 } \ |
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193 while (false) |
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194 #endif |
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195 |
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196 static FTSENT *fts_alloc (FTS *, const char *, size_t) internal_function; |
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197 static FTSENT *fts_build (FTS *, int) internal_function; |
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198 static void fts_lfree (FTSENT *) internal_function; |
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199 static void fts_load (FTS *, FTSENT *) internal_function; |
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200 static size_t fts_maxarglen (char * const *) internal_function; |
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201 static void fts_padjust (FTS *, FTSENT *) internal_function; |
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202 static bool fts_palloc (FTS *, size_t) internal_function; |
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203 static FTSENT *fts_sort (FTS *, FTSENT *, size_t) internal_function; |
5858 | 204 static unsigned short int fts_stat (FTS *, FTSENT *, bool) internal_function; |
205 static int fts_safe_changedir (FTS *, FTSENT *, int, const char *) | |
206 internal_function; | |
207 | |
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208 #include "fts-cycle.c" |
5872 | 209 |
5858 | 210 #ifndef MAX |
211 # define MAX(a,b) ((a) > (b) ? (a) : (b)) | |
212 #endif | |
213 | |
214 #ifndef SIZE_MAX | |
215 # define SIZE_MAX ((size_t) -1) | |
216 #endif | |
217 | |
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218 #define ISDOT(a) (a[0] == '.' && (!a[1] || (a[1] == '.' && !a[2]))) |
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219 #define STREQ(a, b) (strcmp (a, b) == 0) |
5858 | 220 |
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221 #define CLR(opt) (sp->fts_options &= ~(opt)) |
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222 #define ISSET(opt) (sp->fts_options & (opt)) |
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223 #define SET(opt) (sp->fts_options |= (opt)) |
5858 | 224 |
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225 /* FIXME: make this a function */ |
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226 #define RESTORE_INITIAL_CWD(sp) \ |
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227 (fd_ring_clear (&((sp)->fts_fd_ring)), \ |
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228 FCHDIR ((sp), (ISSET (FTS_CWDFD) ? AT_FDCWD : (sp)->fts_rfd))) |
7151 | 229 |
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230 /* FIXME: FTS_NOCHDIR is now misnamed. |
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231 Call it FTS_USE_FULL_RELATIVE_FILE_NAMES instead. */ |
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232 #define FCHDIR(sp, fd) \ |
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233 (!ISSET(FTS_NOCHDIR) && (ISSET(FTS_CWDFD) \ |
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234 ? (cwd_advance_fd ((sp), (fd), true), 0) \ |
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235 : fchdir (fd))) |
7151 | 236 |
5858 | 237 |
238 /* fts_build flags */ | |
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239 /* FIXME: make this an enum */ |
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240 #define BCHILD 1 /* fts_children */ |
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241 #define BNAMES 2 /* fts_children, names only */ |
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242 #define BREAD 3 /* fts_read */ |
5858 | 243 |
244 #if FTS_DEBUG | |
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245 # include <inttypes.h> |
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246 # include <stdint.h> |
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247 # include <stdio.h> |
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248 # include "getcwdat.h" |
5858 | 249 bool fts_debug = false; |
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250 # define Dprintf(x) do { if (fts_debug) printf x; } while (false) |
5858 | 251 #else |
252 # define Dprintf(x) | |
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253 # define fd_ring_check(x) |
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254 # define fd_ring_print(a, b, c) |
5858 | 255 #endif |
256 | |
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257 #define LEAVE_DIR(Fts, Ent, Tag) \ |
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258 do \ |
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259 { \ |
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260 Dprintf ((" %s-leaving: %s\n", Tag, (Ent)->fts_path)); \ |
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261 leave_dir (Fts, Ent); \ |
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262 fd_ring_check (Fts); \ |
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263 } \ |
5872 | 264 while (false) |
5858 | 265 |
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266 static void |
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267 fd_ring_clear (I_ring *fd_ring) |
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268 { |
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269 while ( ! i_ring_empty (fd_ring)) |
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270 { |
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271 int fd = i_ring_pop (fd_ring); |
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272 if (0 <= fd) |
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273 close (fd); |
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274 } |
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275 } |
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276 |
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277 /* Overload the fts_statp->st_size member (otherwise unused, when |
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278 fts_info is FTS_NSOK) to indicate whether fts_read should stat |
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279 this entry or not. */ |
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280 static void |
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281 fts_set_stat_required (FTSENT *p, bool required) |
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282 { |
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283 fts_assert (p->fts_info == FTS_NSOK); |
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284 p->fts_statp->st_size = (required |
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285 ? FTS_STAT_REQUIRED |
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286 : FTS_NO_STAT_REQUIRED); |
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287 } |
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288 |
7151 | 289 /* file-descriptor-relative opendir. */ |
290 /* FIXME: if others need this function, move it into lib/openat.c */ | |
291 static inline DIR * | |
292 internal_function | |
293 opendirat (int fd, char const *dir) | |
294 { | |
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295 int new_fd = openat (fd, dir, |
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296 O_RDONLY | O_DIRECTORY | O_NOCTTY | O_NONBLOCK); |
7151 | 297 DIR *dirp; |
298 | |
299 if (new_fd < 0) | |
300 return NULL; | |
11940 | 301 set_cloexec_flag (new_fd, true); |
7151 | 302 dirp = fdopendir (new_fd); |
303 if (dirp == NULL) | |
304 { | |
305 int saved_errno = errno; | |
306 close (new_fd); | |
307 errno = saved_errno; | |
308 } | |
309 return dirp; | |
310 } | |
311 | |
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312 /* Virtual fchdir. Advance SP's working directory file descriptor, |
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313 SP->fts_cwd_fd, to FD, and push the previous value onto the fd_ring. |
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314 CHDIR_DOWN_ONE is true if FD corresponds to an entry in the directory |
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315 open on sp->fts_cwd_fd; i.e., to move the working directory one level |
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316 down. */ |
7151 | 317 static void |
318 internal_function | |
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319 cwd_advance_fd (FTS *sp, int fd, bool chdir_down_one) |
7151 | 320 { |
321 int old = sp->fts_cwd_fd; | |
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322 fts_assert (old != fd || old == AT_FDCWD); |
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323 |
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324 if (chdir_down_one) |
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325 { |
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326 /* Push "old" onto the ring. |
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327 If the displaced file descriptor is non-negative, close it. */ |
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328 int prev_fd_in_slot = i_ring_push (&sp->fts_fd_ring, old); |
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329 fd_ring_print (sp, stderr, "post-push"); |
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330 if (0 <= prev_fd_in_slot) |
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331 close (prev_fd_in_slot); /* ignore any close failure */ |
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332 } |
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333 else if ( ! ISSET (FTS_NOCHDIR)) |
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334 { |
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335 if (0 <= old) |
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336 close (old); /* ignore any close failure */ |
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337 } |
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338 |
7151 | 339 sp->fts_cwd_fd = fd; |
340 } | |
341 | |
5858 | 342 /* Open the directory DIR if possible, and return a file |
343 descriptor. Return -1 and set errno on failure. It doesn't matter | |
344 whether the file descriptor has read or write access. */ | |
345 | |
7151 | 346 static inline int |
5858 | 347 internal_function |
7151 | 348 diropen (FTS const *sp, char const *dir) |
5858 | 349 { |
7151 | 350 int open_flags = (O_RDONLY | O_DIRECTORY | O_NOCTTY | O_NONBLOCK |
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351 | (ISSET (FTS_PHYSICAL) ? O_NOFOLLOW : 0)); |
7151 | 352 |
11940 | 353 int fd = (ISSET (FTS_CWDFD) |
354 ? openat (sp->fts_cwd_fd, dir, open_flags) | |
355 : open (dir, open_flags)); | |
356 if (0 <= fd) | |
357 set_cloexec_flag (fd, true); | |
358 return fd; | |
5858 | 359 } |
360 | |
361 FTS * | |
362 fts_open (char * const *argv, | |
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363 register int options, |
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364 int (*compar) (FTSENT const **, FTSENT const **)) |
5858 | 365 { |
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366 register FTS *sp; |
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367 register FTSENT *p, *root; |
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368 register size_t nitems; |
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369 FTSENT *parent = NULL; |
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370 FTSENT *tmp = NULL; /* pacify gcc */ |
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371 bool defer_stat; |
5858 | 372 |
12421
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373 /* Options check. */ |
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374 if (options & ~FTS_OPTIONMASK) { |
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375 __set_errno (EINVAL); |
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376 return (NULL); |
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377 } |
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378 if ((options & FTS_NOCHDIR) && (options & FTS_CWDFD)) { |
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379 __set_errno (EINVAL); |
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380 return (NULL); |
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Use spaces for indentation, not tabs.
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381 } |
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382 if ( ! (options & (FTS_LOGICAL | FTS_PHYSICAL))) { |
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383 __set_errno (EINVAL); |
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384 return (NULL); |
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385 } |
5858 | 386 |
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387 /* Allocate/initialize the stream */ |
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388 if ((sp = malloc(sizeof(FTS))) == NULL) |
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389 return (NULL); |
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390 memset(sp, 0, sizeof(FTS)); |
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391 sp->fts_compar = compar; |
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392 sp->fts_options = options; |
5858 | 393 |
12421
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394 /* Logical walks turn on NOCHDIR; symbolic links are too hard. */ |
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395 if (ISSET(FTS_LOGICAL)) { |
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396 SET(FTS_NOCHDIR); |
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397 CLR(FTS_CWDFD); |
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398 } |
7151 | 399 |
12421
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400 /* Initialize fts_cwd_fd. */ |
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401 sp->fts_cwd_fd = AT_FDCWD; |
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402 if ( ISSET(FTS_CWDFD) && ! HAVE_OPENAT_SUPPORT) |
e8d2c6fc33ad
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403 { |
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404 /* While it isn't technically necessary to open "." this |
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405 early, doing it here saves us the trouble of ensuring |
e8d2c6fc33ad
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406 later (where it'd be messier) that "." can in fact |
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407 be opened. If not, revert to FTS_NOCHDIR mode. */ |
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408 int fd = open (".", O_RDONLY); |
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409 if (fd < 0) |
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410 { |
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411 /* Even if `.' is unreadable, don't revert to FTS_NOCHDIR mode |
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412 on systems like Linux+PROC_FS, where our openat emulation |
e8d2c6fc33ad
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413 is good enough. Note: on a system that emulates |
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414 openat via /proc, this technique can still fail, but |
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415 only in extreme conditions, e.g., when the working |
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416 directory cannot be saved (i.e. save_cwd fails) -- |
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417 and that happens on Linux only when "." is unreadable |
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418 and the CWD would be longer than PATH_MAX. |
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419 FIXME: once Linux kernel openat support is well established, |
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420 replace the above open call and this entire if/else block |
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421 with the body of the if-block below. */ |
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422 if ( openat_needs_fchdir ()) |
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423 { |
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|
424 SET(FTS_NOCHDIR); |
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425 CLR(FTS_CWDFD); |
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426 } |
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Use spaces for indentation, not tabs.
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|
427 } |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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|
428 else |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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|
429 { |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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|
430 close (fd); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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|
431 } |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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|
432 } |
5858 | 433 |
12421
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|
434 /* |
e8d2c6fc33ad
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|
435 * Start out with 1K of file name space, and enough, in any case, |
e8d2c6fc33ad
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|
436 * to hold the user's file names. |
e8d2c6fc33ad
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|
437 */ |
5858 | 438 #ifndef MAXPATHLEN |
439 # define MAXPATHLEN 1024 | |
440 #endif | |
12421
e8d2c6fc33ad
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|
441 { |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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|
442 size_t maxarglen = fts_maxarglen(argv); |
e8d2c6fc33ad
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|
443 if (! fts_palloc(sp, MAX(maxarglen, MAXPATHLEN))) |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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diff
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|
444 goto mem1; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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|
445 } |
5858 | 446 |
12421
e8d2c6fc33ad
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|
447 /* Allocate/initialize root's parent. */ |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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|
448 if (*argv != NULL) { |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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|
449 if ((parent = fts_alloc(sp, "", 0)) == NULL) |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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changeset
|
450 goto mem2; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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diff
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|
451 parent->fts_level = FTS_ROOTPARENTLEVEL; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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|
452 } |
5858 | 453 |
12421
e8d2c6fc33ad
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|
454 /* The classic fts implementation would call fts_stat with |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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|
455 a new entry for each iteration of the loop below. |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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|
456 If the comparison function is not specified or if the |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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diff
changeset
|
457 FTS_DEFER_STAT option is in effect, don't stat any entry |
e8d2c6fc33ad
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|
458 in this loop. This is an attempt to minimize the interval |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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diff
changeset
|
459 between the initial stat/lstat/fstatat and the point at which |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
460 a directory argument is first opened. This matters for any |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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diff
changeset
|
461 directory command line argument that resides on a file system |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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diff
changeset
|
462 without genuine i-nodes. If you specify FTS_DEFER_STAT along |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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diff
changeset
|
463 with a comparison function, that function must not access any |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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diff
changeset
|
464 data via the fts_statp pointer. */ |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
465 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
|
466 |
12421
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|
467 /* Allocate/initialize root(s). */ |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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|
468 for (root = NULL, nitems = 0; *argv != NULL; ++argv, ++nitems) { |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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diff
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|
469 /* *Do* allow zero-length file names. */ |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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|
470 size_t len = strlen(*argv); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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|
471 if ((p = fts_alloc(sp, *argv, len)) == NULL) |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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|
472 goto mem3; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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diff
changeset
|
473 p->fts_level = FTS_ROOTLEVEL; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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diff
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|
474 p->fts_parent = parent; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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diff
changeset
|
475 p->fts_accpath = p->fts_name; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
changeset
|
476 /* 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:
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diff
changeset
|
477 command line argument, since fts_read (at least with |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
changeset
|
478 FTS_XDEV) requires that. */ |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
479 if (defer_stat && root != NULL) { |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
480 p->fts_info = FTS_NSOK; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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diff
changeset
|
481 fts_set_stat_required(p, true); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
482 } else { |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
483 p->fts_info = fts_stat(sp, p, false); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
484 } |
5858 | 485 |
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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diff
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|
486 /* |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
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|
487 * If comparison routine supplied, traverse in sorted |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
488 * order; otherwise traverse in the order specified. |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
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|
489 */ |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
changeset
|
490 if (compar) { |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
491 p->fts_link = root; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
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|
492 root = p; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
493 } else { |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
494 p->fts_link = NULL; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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parents:
12378
diff
changeset
|
495 if (root == NULL) |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
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|
496 tmp = root = p; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
changeset
|
497 else { |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
498 tmp->fts_link = p; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
499 tmp = p; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
changeset
|
500 } |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
501 } |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
502 } |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
503 if (compar && nitems > 1) |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
504 root = fts_sort(sp, root, nitems); |
5858 | 505 |
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
506 /* |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
507 * 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
|
508 * 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
|
509 * so that everything about the "current" node is ignored. |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
changeset
|
510 */ |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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diff
changeset
|
511 if ((sp->fts_cur = fts_alloc(sp, "", 0)) == NULL) |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
changeset
|
512 goto mem3; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
changeset
|
513 sp->fts_cur->fts_link = root; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
514 sp->fts_cur->fts_info = FTS_INIT; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
515 if (! setup_dir (sp)) |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
changeset
|
516 goto mem3; |
5858 | 517 |
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
518 /* |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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parents:
12378
diff
changeset
|
519 * 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>
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diff
changeset
|
520 * that we can get back here; this could be avoided for some file names, |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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parents:
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diff
changeset
|
521 * but almost certainly not worth the effort. Slashes, symbolic links, |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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diff
changeset
|
522 * 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>
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12378
diff
changeset
|
523 * descriptor we run anyway, just more slowly. |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
changeset
|
524 */ |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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12378
diff
changeset
|
525 if (!ISSET(FTS_NOCHDIR) && !ISSET(FTS_CWDFD) |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
changeset
|
526 && (sp->fts_rfd = diropen (sp, ".")) < 0) |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
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|
527 SET(FTS_NOCHDIR); |
5858 | 528 |
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
529 i_ring_init (&sp->fts_fd_ring, -1); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
530 return (sp); |
5858 | 531 |
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
changeset
|
532 mem3: fts_lfree(root); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
changeset
|
533 free(parent); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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|
534 mem2: free(sp->fts_path); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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|
535 mem1: free(sp); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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changeset
|
536 return (NULL); |
5858 | 537 } |
538 | |
539 static void | |
540 internal_function | |
541 fts_load (FTS *sp, register FTSENT *p) | |
542 { | |
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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|
543 register size_t len; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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parents:
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diff
changeset
|
544 register char *cp; |
5858 | 545 |
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
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|
546 /* |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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parents:
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diff
changeset
|
547 * Load the stream structure for the next traversal. Since we don't |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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parents:
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diff
changeset
|
548 * 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
|
549 * 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:
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diff
changeset
|
550 * 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>
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diff
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|
551 * known that the file name will fit. |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
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|
552 */ |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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12378
diff
changeset
|
553 len = p->fts_pathlen = p->fts_namelen; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
changeset
|
554 memmove(sp->fts_path, p->fts_name, len + 1); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
changeset
|
555 if ((cp = strrchr(p->fts_name, '/')) && (cp != p->fts_name || cp[1])) { |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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parents:
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diff
changeset
|
556 len = strlen(++cp); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
557 memmove(p->fts_name, cp, len + 1); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
558 p->fts_namelen = len; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
changeset
|
559 } |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
560 p->fts_accpath = p->fts_path = sp->fts_path; |
5858 | 561 } |
562 | |
563 int | |
564 fts_close (FTS *sp) | |
565 { | |
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
566 register FTSENT *freep, *p; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
567 int saved_errno = 0; |
5858 | 568 |
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
changeset
|
569 /* |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
570 * This still works if we haven't read anything -- the dummy structure |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
571 * points to the root list, so we step through to the end of the root |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
572 * list which has a valid parent pointer. |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
573 */ |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
574 if (sp->fts_cur) { |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
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|
575 for (p = sp->fts_cur; p->fts_level >= FTS_ROOTLEVEL;) { |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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parents:
12378
diff
changeset
|
576 freep = p; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
577 p = p->fts_link != NULL ? p->fts_link : p->fts_parent; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
changeset
|
578 free(freep); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
changeset
|
579 } |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
580 free(p); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
581 } |
5858 | 582 |
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
583 /* Free up child linked list, sort array, file name buffer. */ |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
584 if (sp->fts_child) |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
585 fts_lfree(sp->fts_child); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
586 free(sp->fts_array); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
587 free(sp->fts_path); |
5858 | 588 |
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
589 if (ISSET(FTS_CWDFD)) |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
590 { |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
591 if (0 <= sp->fts_cwd_fd) |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
592 if (close (sp->fts_cwd_fd)) |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
593 saved_errno = errno; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
594 } |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
595 else if (!ISSET(FTS_NOCHDIR)) |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
changeset
|
596 { |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
597 /* Return to original directory, save errno if necessary. */ |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
598 if (fchdir(sp->fts_rfd)) |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
599 saved_errno = errno; |
11924
10d064d93551
fts: fts_close now fails also when closing a dir file descriptor fails
Jim Meyering <meyering@redhat.com>
parents:
11722
diff
changeset
|
600 |
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
601 /* If close fails, record errno only if saved_errno is zero, |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
602 so that we report the probably-more-meaningful fchdir errno. */ |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
603 if (close (sp->fts_rfd)) |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
604 if (saved_errno == 0) |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
605 saved_errno = errno; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
606 } |
5858 | 607 |
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
608 fd_ring_clear (&sp->fts_fd_ring); |
11164
90715da41753
fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents:
11163
diff
changeset
|
609 |
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
610 if (sp->fts_leaf_optimization_works_ht) |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
611 hash_free (sp->fts_leaf_optimization_works_ht); |
11164
90715da41753
fts: arrange not to stat non-directories in more cases
Jim Meyering <meyering@redhat.com>
parents:
11163
diff
changeset
|
612 |
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
613 free_dir (sp); |
5858 | 614 |
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
615 /* Free up the stream pointer. */ |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
616 free(sp); |
5858 | 617 |
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
618 /* Set errno and return. */ |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
619 if (saved_errno) { |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
620 __set_errno (saved_errno); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
621 return (-1); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
622 } |
5858 | 623 |
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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624 return (0); |
5858 | 625 } |
626 | |
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627 #if defined __linux__ \ |
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628 && HAVE_SYS_VFS_H && HAVE_FSTATFS && HAVE_STRUCT_STATFS_F_TYPE |
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629 |
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630 #include <sys/vfs.h> |
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631 |
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632 /* Linux-specific constants from coreutils' src/fs.h */ |
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633 # define S_MAGIC_TMPFS 0x1021994 |
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634 # define S_MAGIC_NFS 0x6969 |
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635 # define S_MAGIC_REISERFS 0x52654973 |
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636 # define S_MAGIC_PROC 0x9FA0 |
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637 |
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638 /* Return false if it is easy to determine the file system type of |
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639 the directory on which DIR_FD is open, and sorting dirents on |
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640 inode numbers is known not to improve traversal performance with |
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641 that type of file system. Otherwise, return true. */ |
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642 static bool |
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643 dirent_inode_sort_may_be_useful (int dir_fd) |
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644 { |
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645 /* Skip the sort only if we can determine efficiently |
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646 that skipping it is the right thing to do. |
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647 The cost of performing an unnecessary sort is negligible, |
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648 while the cost of *not* performing it can be O(N^2) with |
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649 a very large constant. */ |
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650 struct statfs fs_buf; |
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651 |
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652 /* If fstatfs fails, assume sorting would be useful. */ |
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653 if (fstatfs (dir_fd, &fs_buf) != 0) |
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654 return true; |
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655 |
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656 /* FIXME: what about when f_type is not an integral type? |
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657 deal with that if/when it's encountered. */ |
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658 switch (fs_buf.f_type) |
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659 { |
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660 case S_MAGIC_TMPFS: |
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661 case S_MAGIC_NFS: |
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662 /* On a file system of any of these types, sorting |
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663 is unnecessary, and hence wasteful. */ |
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664 return false; |
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665 |
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666 default: |
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667 return true; |
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668 } |
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669 } |
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670 |
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671 /* Given a file descriptor DIR_FD open on a directory D, |
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672 return true if it is valid to apply the leaf-optimization |
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673 technique of counting directories in D via stat.st_nlink. */ |
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674 static bool |
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675 leaf_optimization_applies (int dir_fd) |
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676 { |
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677 struct statfs fs_buf; |
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678 |
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679 /* If fstatfs fails, assume we can't use the optimization. */ |
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680 if (fstatfs (dir_fd, &fs_buf) != 0) |
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681 return false; |
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682 |
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683 /* FIXME: do we need to detect AFS mount points? I doubt it, |
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684 unless fstatfs can report S_MAGIC_REISERFS for such a directory. */ |
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685 |
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686 switch (fs_buf.f_type) |
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687 { |
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688 /* List here the file system types that lack useable dirent.d_type |
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689 info, yet for which the optimization does apply. */ |
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690 case S_MAGIC_REISERFS: |
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691 return true; |
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692 |
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693 case S_MAGIC_PROC: |
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694 /* Explicitly listing this or any other file system type for which |
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695 the optimization is not applicable is not necessary, but we leave |
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696 it here to document the risk. Per http://bugs.debian.org/143111, |
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697 /proc may have bogus stat.st_nlink values. */ |
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698 /* fall through */ |
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699 default: |
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700 return false; |
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701 } |
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702 } |
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703 |
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704 #else |
12050 | 705 static bool |
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706 dirent_inode_sort_may_be_useful (int dir_fd _GL_UNUSED) { return true; } |
12050 | 707 static bool |
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708 leaf_optimization_applies (int dir_fd _GL_UNUSED) { return false; } |
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709 #endif |
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710 |
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711 /* link-count-optimization entry: |
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712 map an stat.st_dev number to a boolean: leaf_optimization_works */ |
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713 struct LCO_ent |
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714 { |
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715 dev_t st_dev; |
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716 bool opt_ok; |
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717 }; |
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718 |
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719 /* Use a tiny initial size. If a traversal encounters more than |
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720 a few devices, the cost of growing/rehashing this table will be |
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721 rendered negligible by the number of inodes processed. */ |
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722 enum { LCO_HT_INITIAL_SIZE = 13 }; |
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723 |
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724 static size_t |
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725 LCO_hash (void const *x, size_t table_size) |
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726 { |
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727 struct LCO_ent const *ax = x; |
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728 return (uintmax_t) ax->st_dev % table_size; |
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729 } |
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730 |
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731 static bool |
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732 LCO_compare (void const *x, void const *y) |
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733 { |
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734 struct LCO_ent const *ax = x; |
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735 struct LCO_ent const *ay = y; |
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736 return ax->st_dev == ay->st_dev; |
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737 } |
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738 |
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739 /* Ask the same question as leaf_optimization_applies, but query |
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740 the cache first (FTS.fts_leaf_optimization_works_ht), and if necessary, |
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741 update that cache. */ |
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742 static bool |
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743 link_count_optimize_ok (FTSENT const *p) |
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744 { |
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745 FTS *sp = p->fts_fts; |
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746 Hash_table *h = sp->fts_leaf_optimization_works_ht; |
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747 struct LCO_ent tmp; |
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748 struct LCO_ent *ent; |
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749 bool opt_ok; |
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|
750 struct LCO_ent *t2; |
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|
751 |
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|
752 /* If we're not in CWDFD mode, don't bother with this optimization, |
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753 since the caller is not serious about performance. */ |
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754 if (!ISSET(FTS_CWDFD)) |
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|
755 return false; |
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changeset
|
756 |
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|
757 /* map st_dev to the boolean, leaf_optimization_works */ |
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758 if (h == NULL) |
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|
759 { |
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|
760 h = sp->fts_leaf_optimization_works_ht |
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|
761 = hash_initialize (LCO_HT_INITIAL_SIZE, NULL, LCO_hash, |
e8d2c6fc33ad
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|
762 LCO_compare, free); |
11164
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763 if (h == NULL) |
12421
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764 return false; |
11164
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|
765 } |
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|
766 tmp.st_dev = p->fts_statp->st_dev; |
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767 ent = hash_lookup (h, &tmp); |
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|
768 if (ent) |
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|
769 return ent->opt_ok; |
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|
770 |
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|
771 /* Look-up failed. Query directly and cache the result. */ |
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772 t2 = malloc (sizeof *t2); |
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|
773 if (t2 == NULL) |
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|
774 return false; |
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|
775 |
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changeset
|
776 /* Is it ok to perform the optimization in the dir, FTS_CWD_FD? */ |
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|
777 opt_ok = leaf_optimization_applies (sp->fts_cwd_fd); |
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|
778 t2->opt_ok = opt_ok; |
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|
779 t2->st_dev = p->fts_statp->st_dev; |
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|
780 |
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changeset
|
781 ent = hash_insert (h, t2); |
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|
782 if (ent == NULL) |
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changeset
|
783 { |
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changeset
|
784 /* insertion failed */ |
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changeset
|
785 free (t2); |
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changeset
|
786 return false; |
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diff
changeset
|
787 } |
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changeset
|
788 fts_assert (ent == t2); |
90715da41753
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changeset
|
789 |
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diff
changeset
|
790 return opt_ok; |
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diff
changeset
|
791 } |
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|
792 |
5858 | 793 /* |
5907 | 794 * Special case of "/" at the end of the file name so that slashes aren't |
795 * appended which would cause file names to be written as "....//foo". | |
5858 | 796 */ |
12421
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Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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|
797 #define NAPPEND(p) \ |
e8d2c6fc33ad
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|
798 (p->fts_path[p->fts_pathlen - 1] == '/' \ |
e8d2c6fc33ad
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|
799 ? p->fts_pathlen - 1 : p->fts_pathlen) |
5858 | 800 |
801 FTSENT * | |
802 fts_read (register FTS *sp) | |
803 { | |
12421
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Use spaces for indentation, not tabs.
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|
804 register FTSENT *p, *tmp; |
e8d2c6fc33ad
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|
805 register unsigned short int instr; |
e8d2c6fc33ad
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|
806 register char *t; |
5858 | 807 |
12421
e8d2c6fc33ad
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|
808 /* If finished or unrecoverable error, return NULL. */ |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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|
809 if (sp->fts_cur == NULL || ISSET(FTS_STOP)) |
e8d2c6fc33ad
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|
810 return (NULL); |
5858 | 811 |
12421
e8d2c6fc33ad
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|
812 /* Set current node pointer. */ |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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changeset
|
813 p = sp->fts_cur; |
5858 | 814 |
12421
e8d2c6fc33ad
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|
815 /* Save and zero out user instructions. */ |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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changeset
|
816 instr = p->fts_instr; |
e8d2c6fc33ad
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changeset
|
817 p->fts_instr = FTS_NOINSTR; |
5858 | 818 |
12421
e8d2c6fc33ad
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diff
changeset
|
819 /* Any type of file may be re-visited; re-stat and re-turn. */ |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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|
820 if (instr == FTS_AGAIN) { |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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changeset
|
821 p->fts_info = fts_stat(sp, p, false); |
e8d2c6fc33ad
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|
822 return (p); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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diff
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|
823 } |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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diff
changeset
|
824 Dprintf (("fts_read: p=%s\n", |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
825 p->fts_info == FTS_INIT ? "" : p->fts_path)); |
5858 | 826 |
12421
e8d2c6fc33ad
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diff
changeset
|
827 /* |
e8d2c6fc33ad
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changeset
|
828 * Following a symlink -- SLNONE test allows application to see |
e8d2c6fc33ad
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diff
changeset
|
829 * SLNONE and recover. If indirecting through a symlink, have |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
changeset
|
830 * keep a pointer to current location. If unable to get that |
e8d2c6fc33ad
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diff
changeset
|
831 * pointer, follow fails. |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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diff
changeset
|
832 */ |
e8d2c6fc33ad
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diff
changeset
|
833 if (instr == FTS_FOLLOW && |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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12378
diff
changeset
|
834 (p->fts_info == FTS_SL || p->fts_info == FTS_SLNONE)) { |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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12378
diff
changeset
|
835 p->fts_info = fts_stat(sp, p, true); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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12378
diff
changeset
|
836 if (p->fts_info == FTS_D && !ISSET(FTS_NOCHDIR)) { |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
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|
837 if ((p->fts_symfd = diropen (sp, ".")) < 0) { |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
changeset
|
838 p->fts_errno = errno; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
839 p->fts_info = FTS_ERR; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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parents:
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diff
changeset
|
840 } else |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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diff
changeset
|
841 p->fts_flags |= FTS_SYMFOLLOW; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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diff
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|
842 } |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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|
843 goto check_for_dir; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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12378
diff
changeset
|
844 } |
5858 | 845 |
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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diff
changeset
|
846 /* Directory in pre-order. */ |
e8d2c6fc33ad
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Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
847 if (p->fts_info == FTS_D) { |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
changeset
|
848 /* If skipped or crossed mount point, do post-order visit. */ |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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parents:
12378
diff
changeset
|
849 if (instr == FTS_SKIP || |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
850 (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
|
851 if (p->fts_flags & FTS_SYMFOLLOW) |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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12378
diff
changeset
|
852 (void)close(p->fts_symfd); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
changeset
|
853 if (sp->fts_child) { |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
changeset
|
854 fts_lfree(sp->fts_child); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
855 sp->fts_child = NULL; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
changeset
|
856 } |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
857 p->fts_info = FTS_DP; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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parents:
12378
diff
changeset
|
858 LEAVE_DIR (sp, p, "1"); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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12378
diff
changeset
|
859 return (p); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
changeset
|
860 } |
5858 | 861 |
12421
e8d2c6fc33ad
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Bruno Haible <bruno@clisp.org>
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diff
changeset
|
862 /* Rebuild if only read the names and now traversing. */ |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
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|
863 if (sp->fts_child != NULL && ISSET(FTS_NAMEONLY)) { |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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parents:
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diff
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|
864 CLR(FTS_NAMEONLY); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
865 fts_lfree(sp->fts_child); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
866 sp->fts_child = NULL; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
867 } |
5858 | 868 |
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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diff
changeset
|
869 /* |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
870 * Cd to the subdirectory. |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
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|
871 * |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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diff
changeset
|
872 * 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
|
873 * 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:
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diff
changeset
|
874 * 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
|
875 * Set the FTS_DONTCHDIR flag so that when we logically change |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
876 * 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
|
877 * |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
878 * 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
|
879 * 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
|
880 */ |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
881 if (sp->fts_child != NULL) { |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
882 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
|
883 p->fts_errno = errno; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
884 p->fts_flags |= FTS_DONTCHDIR; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
885 for (p = sp->fts_child; p != NULL; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
886 p = p->fts_link) |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
887 p->fts_accpath = |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
888 p->fts_parent->fts_accpath; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
889 } |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
890 } 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
|
891 if (ISSET(FTS_STOP)) |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
892 return (NULL); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
893 /* 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
|
894 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
|
895 subdirectory, tell the caller. */ |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
896 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
|
897 p->fts_info = FTS_ERR; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
898 LEAVE_DIR (sp, p, "2"); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
899 return (p); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
900 } |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
901 p = sp->fts_child; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
902 sp->fts_child = NULL; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
903 goto name; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
904 } |
5858 | 905 |
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
906 /* Move to the next node on this level. */ |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
907 next: tmp = p; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
908 if ((p = p->fts_link) != NULL) { |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
909 sp->fts_cur = p; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
910 free(tmp); |
5858 | 911 |
12421
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 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
|
914 * 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
|
915 * root. |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
916 */ |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
917 if (p->fts_level == FTS_ROOTLEVEL) { |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
918 if (RESTORE_INITIAL_CWD(sp)) { |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
919 SET(FTS_STOP); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
920 return (NULL); |
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 free_dir(sp); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
923 fts_load(sp, p); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
924 setup_dir(sp); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
925 goto check_for_dir; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
926 } |
5858 | 927 |
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
928 /* |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
929 * 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
|
930 * 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
|
931 * get back if necessary. |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
932 */ |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
933 if (p->fts_instr == FTS_SKIP) |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
934 goto next; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
935 if (p->fts_instr == FTS_FOLLOW) { |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
936 p->fts_info = fts_stat(sp, p, true); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
937 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
|
938 if ((p->fts_symfd = diropen (sp, ".")) < 0) { |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
939 p->fts_errno = errno; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
940 p->fts_info = FTS_ERR; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
941 } else |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
942 p->fts_flags |= FTS_SYMFOLLOW; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
943 } |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
944 p->fts_instr = FTS_NOINSTR; |
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 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
|
948 *t++ = '/'; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
949 memmove(t, p->fts_name, p->fts_namelen + 1); |
5872 | 950 check_for_dir: |
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
951 sp->fts_cur = p; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
952 if (p->fts_info == FTS_NSOK) |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
953 { |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
954 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
|
955 { |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
956 FTSENT *parent = p->fts_parent; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
957 if (FTS_ROOTLEVEL < p->fts_level |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
958 /* ->fts_n_dirs_remaining is not valid |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
959 for command-line-specified names. */ |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
960 && parent->fts_n_dirs_remaining == 0 |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
961 && ISSET(FTS_NOSTAT) |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
962 && ISSET(FTS_PHYSICAL) |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
963 && link_count_optimize_ok (parent)) |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
964 { |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
965 /* nothing more needed */ |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
966 } |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
967 else |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
968 { |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
969 p->fts_info = fts_stat(sp, p, false); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
970 if (S_ISDIR(p->fts_statp->st_mode) |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
971 && p->fts_level != FTS_ROOTLEVEL |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
972 && parent->fts_n_dirs_remaining) |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
973 parent->fts_n_dirs_remaining--; |
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 } |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
976 else |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
977 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
|
978 } |
7707
3f57a32346a2
* lib/fts.c (fts_load): Don't set sp->fts_dev here, since
Jim Meyering <jim@meyering.net>
parents:
7684
diff
changeset
|
979 |
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
980 if (p->fts_info == FTS_D) |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
981 { |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
982 /* 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
|
983 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
|
984 device number, to be used for FTS_XDEV. */ |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
985 if (p->fts_level == FTS_ROOTLEVEL) |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
986 sp->fts_dev = p->fts_statp->st_dev; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
987 Dprintf ((" entering: %s\n", p->fts_path)); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
988 if (! enter_dir (sp, p)) |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
989 { |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
990 __set_errno (ENOMEM); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
991 return NULL; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
992 } |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
993 } |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
994 return p; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
995 } |
5858 | 996 |
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
997 /* Move up to the parent node. */ |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
998 p = tmp->fts_parent; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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|
999 sp->fts_cur = p; |
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Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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|
1000 free(tmp); |
5858 | 1001 |
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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diff
changeset
|
1002 if (p->fts_level == FTS_ROOTPARENTLEVEL) { |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
1003 /* |
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Use spaces for indentation, not tabs.
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diff
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|
1004 * Done; free everything up and set errno to 0 so the user |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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|
1005 * can distinguish between error and EOF. |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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|
1006 */ |
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Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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|
1007 free(p); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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|
1008 __set_errno (0); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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|
1009 return (sp->fts_cur = NULL); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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|
1010 } |
5858 | 1011 |
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
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|
1012 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>
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7408
diff
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|
1013 |
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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|
1014 /* NUL terminate the file name. */ |
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Use spaces for indentation, not tabs.
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diff
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|
1015 sp->fts_path[p->fts_pathlen] = '\0'; |
5858 | 1016 |
12421
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Use spaces for indentation, not tabs.
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|
1017 /* |
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Use spaces for indentation, not tabs.
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diff
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|
1018 * Return to the parent directory. If at a root node, restore |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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diff
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|
1019 * the initial working directory. If we came through a symlink, |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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|
1020 * 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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|
1021 * one level, via "..". |
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Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
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|
1022 */ |
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Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
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|
1023 if (p->fts_level == FTS_ROOTLEVEL) { |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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|
1024 if (RESTORE_INITIAL_CWD(sp)) { |
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Use spaces for indentation, not tabs.
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diff
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|
1025 p->fts_errno = errno; |
e8d2c6fc33ad
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|
1026 SET(FTS_STOP); |
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Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
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|
1027 } |
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Use spaces for indentation, not tabs.
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|
1028 } else if (p->fts_flags & FTS_SYMFOLLOW) { |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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|
1029 if (FCHDIR(sp, p->fts_symfd)) { |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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diff
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|
1030 int saved_errno = errno; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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diff
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|
1031 (void)close(p->fts_symfd); |
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Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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|
1032 __set_errno (saved_errno); |
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Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
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|
1033 p->fts_errno = errno; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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changeset
|
1034 SET(FTS_STOP); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
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|
1035 } |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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|
1036 (void)close(p->fts_symfd); |
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diff
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|
1037 } else if (!(p->fts_flags & FTS_DONTCHDIR) && |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
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|
1038 fts_safe_changedir(sp, p->fts_parent, -1, "..")) { |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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diff
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|
1039 p->fts_errno = errno; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
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|
1040 SET(FTS_STOP); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
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|
1041 } |
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Use spaces for indentation, not tabs.
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diff
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|
1042 p->fts_info = p->fts_errno ? FTS_ERR : FTS_DP; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
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|
1043 if (p->fts_errno == 0) |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
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|
1044 LEAVE_DIR (sp, p, "3"); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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|
1045 return ISSET(FTS_STOP) ? NULL : p; |
5858 | 1046 } |
1047 | |
1048 /* | |
1049 * Fts_set takes the stream as an argument although it's not used in this | |
1050 * implementation; it would be necessary if anyone wanted to add global | |
1051 * semantics to fts using fts_set. An error return is allowed for similar | |
1052 * reasons. | |
1053 */ | |
1054 /* ARGSUSED */ | |
1055 int | |
12482
11bc92a9e2bc
gnulib-common: prefer _GL_UNUSED over _UNUSED_PARAMETER_
Eric Blake <ebb9@byu.net>
parents:
12421
diff
changeset
|
1056 fts_set(FTS *sp _GL_UNUSED, FTSENT *p, int instr) |
5858 | 1057 { |
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
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|
1058 if (instr != 0 && instr != FTS_AGAIN && instr != FTS_FOLLOW && |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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|
1059 instr != FTS_NOINSTR && instr != FTS_SKIP) { |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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|
1060 __set_errno (EINVAL); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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|
1061 return (1); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
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|
1062 } |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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parents:
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diff
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|
1063 p->fts_instr = instr; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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|
1064 return (0); |
5858 | 1065 } |
1066 | |
1067 FTSENT * | |
1068 fts_children (register FTS *sp, int instr) | |
1069 { | |
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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changeset
|
1070 register FTSENT *p; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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|
1071 int fd; |
5858 | 1072 |
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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|
1073 if (instr != 0 && instr != FTS_NAMEONLY) { |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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changeset
|
1074 __set_errno (EINVAL); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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|
1075 return (NULL); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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|
1076 } |
5858 | 1077 |
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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|
1078 /* Set current node pointer. */ |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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|
1079 p = sp->fts_cur; |
5858 | 1080 |
12421
e8d2c6fc33ad
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Bruno Haible <bruno@clisp.org>
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diff
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|
1081 /* |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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|
1082 * Errno set to 0 so user can distinguish empty directory from |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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|
1083 * an error. |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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|
1084 */ |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
1085 __set_errno (0); |
5858 | 1086 |
12421
e8d2c6fc33ad
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diff
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|
1087 /* Fatal errors stop here. */ |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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|
1088 if (ISSET(FTS_STOP)) |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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changeset
|
1089 return (NULL); |
5858 | 1090 |
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
1091 /* Return logical hierarchy of user's arguments. */ |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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parents:
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diff
changeset
|
1092 if (p->fts_info == FTS_INIT) |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
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|
1093 return (p->fts_link); |
5858 | 1094 |
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
1095 /* |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
1096 * If not a directory being visited in pre-order, stop here. Could |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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|
1097 * allow FTS_DNR, assuming the user has fixed the problem, but the |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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|
1098 * same effect is available with FTS_AGAIN. |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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diff
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|
1099 */ |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
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|
1100 if (p->fts_info != FTS_D /* && p->fts_info != FTS_DNR */) |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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|
1101 return (NULL); |
5858 | 1102 |
12421
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Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
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|
1103 /* Free up any previous child list. */ |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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|
1104 if (sp->fts_child != NULL) |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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diff
changeset
|
1105 fts_lfree(sp->fts_child); |
5858 | 1106 |
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
1107 if (instr == FTS_NAMEONLY) { |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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|
1108 SET(FTS_NAMEONLY); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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|
1109 instr = BNAMES; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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diff
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|
1110 } else |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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|
1111 instr = BCHILD; |
5858 | 1112 |
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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diff
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|
1113 /* |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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|
1114 * If using chdir on a relative file name and called BEFORE fts_read |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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|
1115 * does its chdir to the root of a traversal, we can lose -- we need to |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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diff
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|
1116 * chdir into the subdirectory, and we don't know where the current |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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diff
changeset
|
1117 * directory is, so we can't get back so that the upcoming chdir by |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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|
1118 * fts_read will work. |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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|
1119 */ |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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|
1120 if (p->fts_level != FTS_ROOTLEVEL || p->fts_accpath[0] == '/' || |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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diff
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|
1121 ISSET(FTS_NOCHDIR)) |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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|
1122 return (sp->fts_child = fts_build(sp, instr)); |
5858 | 1123 |
12421
e8d2c6fc33ad
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|
1124 if ((fd = diropen (sp, ".")) < 0) |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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diff
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|
1125 return (sp->fts_child = NULL); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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diff
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|
1126 sp->fts_child = fts_build(sp, instr); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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diff
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|
1127 if (ISSET(FTS_CWDFD)) |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
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|
1128 { |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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diff
changeset
|
1129 cwd_advance_fd (sp, fd, true); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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diff
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|
1130 } |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
1131 else |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
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|
1132 { |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
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|
1133 if (fchdir(fd)) |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
1134 { |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
1135 int saved_errno = errno; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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diff
changeset
|
1136 close (fd); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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diff
changeset
|
1137 __set_errno (saved_errno); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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diff
changeset
|
1138 return NULL; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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|
1139 } |
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1140 close (fd); |
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|
1141 } |
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|
1142 return (sp->fts_child); |
5858 | 1143 } |
1144 | |
10481
47fe4e48e158
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|
1145 /* A comparison function to sort on increasing inode number. |
47fe4e48e158
fts: sort dirent entries on inode number before traversing
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diff
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|
1146 For some file system types, sorting either way makes a huge |
47fe4e48e158
fts: sort dirent entries on inode number before traversing
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|
1147 performance difference for a directory with very many entries, |
47fe4e48e158
fts: sort dirent entries on inode number before traversing
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1148 but sorting on increasing values is slightly better than sorting |
47fe4e48e158
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|
1149 on decreasing values. The difference is in the 5% range. */ |
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|
1150 static int |
47fe4e48e158
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|
1151 fts_compare_ino (struct _ftsent const **a, struct _ftsent const **b) |
47fe4e48e158
fts: sort dirent entries on inode number before traversing
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diff
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|
1152 { |
10482
e8d1a5b2c49c
fts: tweak inode comparison function
Jim Meyering <meyering@redhat.com>
parents:
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diff
changeset
|
1153 return (a[0]->fts_statp->st_ino < b[0]->fts_statp->st_ino ? -1 |
12421
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|
1154 : b[0]->fts_statp->st_ino < a[0]->fts_statp->st_ino ? 1 : 0); |
10481
47fe4e48e158
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diff
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|
1155 } |
47fe4e48e158
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diff
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|
1156 |
10843
36479bd141ee
fts: provide dirent.d_type via FTSENT.fts_statp, when possible
Jim Meyering <meyering@redhat.com>
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diff
changeset
|
1157 /* Map the dirent.d_type value, DTYPE, to the corresponding stat.st_mode |
36479bd141ee
fts: provide dirent.d_type via FTSENT.fts_statp, when possible
Jim Meyering <meyering@redhat.com>
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diff
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|
1158 S_IF* bit and set ST.st_mode, thus clearing all other bits in that field. */ |
36479bd141ee
fts: provide dirent.d_type via FTSENT.fts_statp, when possible
Jim Meyering <meyering@redhat.com>
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diff
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|
1159 static void |
36479bd141ee
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Jim Meyering <meyering@redhat.com>
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diff
changeset
|
1160 set_stat_type (struct stat *st, unsigned int dtype) |
36479bd141ee
fts: provide dirent.d_type via FTSENT.fts_statp, when possible
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|
1161 { |
36479bd141ee
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Jim Meyering <meyering@redhat.com>
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diff
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|
1162 mode_t type; |
36479bd141ee
fts: provide dirent.d_type via FTSENT.fts_statp, when possible
Jim Meyering <meyering@redhat.com>
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diff
changeset
|
1163 switch (dtype) |
36479bd141ee
fts: provide dirent.d_type via FTSENT.fts_statp, when possible
Jim Meyering <meyering@redhat.com>
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diff
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|
1164 { |
36479bd141ee
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Jim Meyering <meyering@redhat.com>
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diff
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|
1165 case DT_BLK: |
36479bd141ee
fts: provide dirent.d_type via FTSENT.fts_statp, when possible
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|
1166 type = S_IFBLK; |
36479bd141ee
fts: provide dirent.d_type via FTSENT.fts_statp, when possible
Jim Meyering <meyering@redhat.com>
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|
1167 break; |
36479bd141ee
fts: provide dirent.d_type via FTSENT.fts_statp, when possible
Jim Meyering <meyering@redhat.com>
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diff
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|
1168 case DT_CHR: |
36479bd141ee
fts: provide dirent.d_type via FTSENT.fts_statp, when possible
Jim Meyering <meyering@redhat.com>
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diff
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|
1169 type = S_IFCHR; |
36479bd141ee
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Jim Meyering <meyering@redhat.com>
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|
1170 break; |
36479bd141ee
fts: provide dirent.d_type via FTSENT.fts_statp, when possible
Jim Meyering <meyering@redhat.com>
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diff
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|
1171 case DT_DIR: |
36479bd141ee
fts: provide dirent.d_type via FTSENT.fts_statp, when possible
Jim Meyering <meyering@redhat.com>
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diff
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|
1172 type = S_IFDIR; |
36479bd141ee
fts: provide dirent.d_type via FTSENT.fts_statp, when possible
Jim Meyering <meyering@redhat.com>
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diff
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|
1173 break; |
36479bd141ee
fts: provide dirent.d_type via FTSENT.fts_statp, when possible
Jim Meyering <meyering@redhat.com>
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diff
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|
1174 case DT_FIFO: |
36479bd141ee
fts: provide dirent.d_type via FTSENT.fts_statp, when possible
Jim Meyering <meyering@redhat.com>
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diff
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|
1175 type = S_IFIFO; |
36479bd141ee
fts: provide dirent.d_type via FTSENT.fts_statp, when possible
Jim Meyering <meyering@redhat.com>
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diff
changeset
|
1176 break; |
36479bd141ee
fts: provide dirent.d_type via FTSENT.fts_statp, when possible
Jim Meyering <meyering@redhat.com>
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diff
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|
1177 case DT_LNK: |
36479bd141ee
fts: provide dirent.d_type via FTSENT.fts_statp, when possible
Jim Meyering <meyering@redhat.com>
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diff
changeset
|
1178 type = S_IFLNK; |
36479bd141ee
fts: provide dirent.d_type via FTSENT.fts_statp, when possible
Jim Meyering <meyering@redhat.com>
parents:
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diff
changeset
|
1179 break; |
36479bd141ee
fts: provide dirent.d_type via FTSENT.fts_statp, when possible
Jim Meyering <meyering@redhat.com>
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diff
changeset
|
1180 case DT_REG: |
36479bd141ee
fts: provide dirent.d_type via FTSENT.fts_statp, when possible
Jim Meyering <meyering@redhat.com>
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diff
changeset
|
1181 type = S_IFREG; |
36479bd141ee
fts: provide dirent.d_type via FTSENT.fts_statp, when possible
Jim Meyering <meyering@redhat.com>
parents:
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diff
changeset
|
1182 break; |
36479bd141ee
fts: provide dirent.d_type via FTSENT.fts_statp, when possible
Jim Meyering <meyering@redhat.com>
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diff
changeset
|
1183 case DT_SOCK: |
36479bd141ee
fts: provide dirent.d_type via FTSENT.fts_statp, when possible
Jim Meyering <meyering@redhat.com>
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diff
changeset
|
1184 type = S_IFSOCK; |
36479bd141ee
fts: provide dirent.d_type via FTSENT.fts_statp, when possible
Jim Meyering <meyering@redhat.com>
parents:
10688
diff
changeset
|
1185 break; |
36479bd141ee
fts: provide dirent.d_type via FTSENT.fts_statp, when possible
Jim Meyering <meyering@redhat.com>
parents:
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diff
changeset
|
1186 default: |
36479bd141ee
fts: provide dirent.d_type via FTSENT.fts_statp, when possible
Jim Meyering <meyering@redhat.com>
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diff
changeset
|
1187 type = 0; |
36479bd141ee
fts: provide dirent.d_type via FTSENT.fts_statp, when possible
Jim Meyering <meyering@redhat.com>
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diff
changeset
|
1188 } |
10844 | 1189 st->st_mode = type; |
10843
36479bd141ee
fts: provide dirent.d_type via FTSENT.fts_statp, when possible
Jim Meyering <meyering@redhat.com>
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diff
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|
1190 } |
36479bd141ee
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Jim Meyering <meyering@redhat.com>
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diff
changeset
|
1191 |
5858 | 1192 /* |
1193 * This is the tricky part -- do not casually change *anything* in here. The | |
1194 * idea is to build the linked list of entries that are used by fts_children | |
1195 * and fts_read. There are lots of special cases. | |
1196 * | |
1197 * The real slowdown in walking the tree is the stat calls. If FTS_NOSTAT is | |
1198 * set and it's a physical walk (so that symbolic links can't be directories), | |
1199 * we can do things quickly. First, if it's a 4.4BSD file system, the type | |
1200 * of the file is in the directory entry. Otherwise, we assume that the number | |
1201 * of subdirectories in a node is equal to the number of links to the parent. | |
1202 * The former skips all stat calls. The latter skips stat calls in any leaf | |
1203 * directories and for any files after the subdirectories in the directory have | |
1204 * been found, cutting the stat calls by about 2/3. | |
1205 */ | |
1206 static FTSENT * | |
1207 internal_function | |
1208 fts_build (register FTS *sp, int type) | |
1209 { | |
12421
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Use spaces for indentation, not tabs.
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|
1210 register struct dirent *dp; |
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|
1211 register FTSENT *p, *head; |
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Use spaces for indentation, not tabs.
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|
1212 register size_t nitems; |
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Use spaces for indentation, not tabs.
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|
1213 FTSENT *cur, *tail; |
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Use spaces for indentation, not tabs.
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|
1214 DIR *dirp; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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|
1215 void *oldaddr; |
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Use spaces for indentation, not tabs.
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diff
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|
1216 int saved_errno; |
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Use spaces for indentation, not tabs.
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diff
changeset
|
1217 bool descend; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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diff
changeset
|
1218 bool doadjust; |
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Use spaces for indentation, not tabs.
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|
1219 ptrdiff_t level; |
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Use spaces for indentation, not tabs.
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diff
changeset
|
1220 nlink_t nlinks; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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diff
changeset
|
1221 bool nostat; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
1222 size_t len, maxlen, new_len; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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diff
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|
1223 char *cp; |
5858 | 1224 |
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
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|
1225 /* Set current node pointer. */ |
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Use spaces for indentation, not tabs.
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diff
changeset
|
1226 cur = sp->fts_cur; |
5858 | 1227 |
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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diff
changeset
|
1228 /* |
e8d2c6fc33ad
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diff
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|
1229 * Open the directory for reading. If this fails, we're done. |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
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|
1230 * If being called from fts_read, set the fts_info field. |
e8d2c6fc33ad
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diff
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|
1231 */ |
5858 | 1232 #if defined FTS_WHITEOUT && 0 |
12421
e8d2c6fc33ad
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diff
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|
1233 if (ISSET(FTS_WHITEOUT)) |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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diff
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|
1234 oflag = DTF_NODUP|DTF_REWIND; |
e8d2c6fc33ad
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Bruno Haible <bruno@clisp.org>
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diff
changeset
|
1235 else |
e8d2c6fc33ad
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Bruno Haible <bruno@clisp.org>
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diff
changeset
|
1236 oflag = DTF_HIDEW|DTF_NODUP|DTF_REWIND; |
5858 | 1237 #else |
7151 | 1238 # define __opendir2(file, flag) \ |
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
1239 ( ! ISSET(FTS_NOCHDIR) && ISSET(FTS_CWDFD) \ |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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diff
changeset
|
1240 ? opendirat(sp->fts_cwd_fd, file) \ |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
1241 : opendir(file)) |
5858 | 1242 #endif |
1243 if ((dirp = __opendir2(cur->fts_accpath, oflag)) == NULL) { | |
12421
e8d2c6fc33ad
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Bruno Haible <bruno@clisp.org>
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diff
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|
1244 if (type == BREAD) { |
e8d2c6fc33ad
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|
1245 cur->fts_info = FTS_DNR; |
e8d2c6fc33ad
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|
1246 cur->fts_errno = errno; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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diff
changeset
|
1247 } |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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|
1248 return (NULL); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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diff
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|
1249 } |
7482
26914593f079
Big performance improvement for fts-based tools that use FTS_NOSTAT.
Jim Meyering <jim@meyering.net>
parents:
7408
diff
changeset
|
1250 /* Rather than calling fts_stat for each and every entry encountered |
12421
e8d2c6fc33ad
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|
1251 in the readdir loop (below), stat each directory only right after |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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diff
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|
1252 opening it. */ |
7482
26914593f079
Big performance improvement for fts-based tools that use FTS_NOSTAT.
Jim Meyering <jim@meyering.net>
parents:
7408
diff
changeset
|
1253 if (cur->fts_info == FTS_NSOK) |
12421
e8d2c6fc33ad
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diff
changeset
|
1254 cur->fts_info = fts_stat(sp, cur, false); |
12271
a58d32199602
fts: do not fail on a submount during traversal
Kamil Dudka <kdudka@redhat.com>
parents:
12134
diff
changeset
|
1255 else if (sp->fts_options & FTS_TIGHT_CYCLE_CHECK) { |
12421
e8d2c6fc33ad
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|
1256 /* Now read the stat info again after opening a directory to |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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|
1257 * reveal eventual changes caused by a submount triggered by |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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|
1258 * the traversal. But do it only for utilities which use |
e8d2c6fc33ad
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|
1259 * FTS_TIGHT_CYCLE_CHECK. Therefore, only find and du |
e8d2c6fc33ad
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|
1260 * benefit/suffer from this feature for now. |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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diff
changeset
|
1261 */ |
e8d2c6fc33ad
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diff
changeset
|
1262 LEAVE_DIR (sp, cur, "4"); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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|
1263 fts_stat (sp, cur, false); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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diff
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|
1264 if (! enter_dir (sp, cur)) { |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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|
1265 __set_errno (ENOMEM); |
e8d2c6fc33ad
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diff
changeset
|
1266 return NULL; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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diff
changeset
|
1267 } |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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diff
changeset
|
1268 } |
5858 | 1269 |
12421
e8d2c6fc33ad
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diff
changeset
|
1270 /* |
e8d2c6fc33ad
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changeset
|
1271 * Nlinks is the number of possible entries of type directory in the |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff
changeset
|
1272 * directory if we're cheating on stat calls, 0 if we're not doing |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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12378
diff
changeset
|
1273 * any stat calls at all, (nlink_t) -1 if we're statting everything. |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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diff
changeset
|
1274 */ |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1275 if (type == BNAMES) { |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1276 nlinks = 0; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1277 /* Be quiet about nostat, GCC. */ |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1278 nostat = false; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1279 } else if (ISSET(FTS_NOSTAT) && ISSET(FTS_PHYSICAL)) { |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1280 nlinks = (cur->fts_statp->st_nlink |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1281 - (ISSET(FTS_SEEDOT) ? 0 : 2)); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1282 nostat = true; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1283 } else { |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1284 nlinks = -1; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1285 nostat = false; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1286 } |
5858 | 1287 |
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1288 /* |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1289 * If we're going to need to stat anything or we want to descend |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1290 * and stay in the directory, chdir. If this fails we keep going, |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1291 * but set a flag so we don't chdir after the post-order visit. |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1292 * We won't be able to stat anything, but we can still return the |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1293 * names themselves. Note, that since fts_read won't be able to |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1294 * 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
|
1295 * 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
|
1296 * has already been visited in pre-order, have to wait until the |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1297 * post-order visit to return the error. There is a special case |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1298 * here, if there was nothing to stat then it's not an error to |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1299 * not be able to stat. This is all fairly nasty. If a program |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1300 * 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
|
1301 * checking FTS_NS on the returned nodes. |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1302 */ |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1303 if (nlinks || type == BREAD) { |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1304 int dir_fd = dirfd(dirp); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1305 if (ISSET(FTS_CWDFD) && 0 <= dir_fd) |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1306 { |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1307 dir_fd = dup (dir_fd); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1308 set_cloexec_flag (dir_fd, true); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1309 } |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1310 if (dir_fd < 0 || fts_safe_changedir(sp, cur, dir_fd, NULL)) { |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1311 if (nlinks && type == BREAD) |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1312 cur->fts_errno = errno; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1313 cur->fts_flags |= FTS_DONTCHDIR; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1314 descend = false; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1315 closedir(dirp); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1316 if (ISSET(FTS_CWDFD) && 0 <= dir_fd) |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1317 close (dir_fd); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1318 dirp = NULL; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1319 } else |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1320 descend = true; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1321 } else |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1322 descend = false; |
5858 | 1323 |
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1324 /* |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1325 * Figure out the max file name length that can be stored in the |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1326 * current buffer -- the inner loop allocates more space as necessary. |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1327 * 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
|
1328 * 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
|
1329 * 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
|
1330 * |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1331 * 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
|
1332 * each new component into the file name. |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1333 */ |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1334 len = NAPPEND(cur); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1335 if (ISSET(FTS_NOCHDIR)) { |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1336 cp = sp->fts_path + len; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1337 *cp++ = '/'; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1338 } else { |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1339 /* GCC, you're too verbose. */ |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1340 cp = NULL; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1341 } |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1342 len++; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1343 maxlen = sp->fts_pathlen - len; |
5858 | 1344 |
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1345 level = cur->fts_level + 1; |
5858 | 1346 |
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1347 /* Read the directory, attaching each entry to the `link' pointer. */ |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1348 doadjust = false; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1349 for (head = tail = NULL, nitems = 0; dirp && (dp = readdir(dirp));) { |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1350 bool is_dir; |
7555
0da62e3fa6c7
(fts_build): Move variable declaration, for C89 compliance.
Bruno Haible <bruno@clisp.org>
parents:
7499
diff
changeset
|
1351 |
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1352 if (!ISSET(FTS_SEEDOT) && ISDOT(dp->d_name)) |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1353 continue; |
5858 | 1354 |
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1355 if ((p = fts_alloc (sp, dp->d_name, |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1356 _D_EXACT_NAMLEN (dp))) == NULL) |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1357 goto mem1; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1358 if (_D_EXACT_NAMLEN (dp) >= maxlen) { |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1359 /* include space for NUL */ |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1360 oldaddr = sp->fts_path; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1361 if (! fts_palloc(sp, _D_EXACT_NAMLEN (dp) + len + 1)) { |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1362 /* |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1363 * No more memory. Save |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1364 * errno, free up the current structure and the |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1365 * structures already allocated. |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1366 */ |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1367 mem1: saved_errno = errno; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1368 free(p); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1369 fts_lfree(head); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1370 closedir(dirp); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1371 cur->fts_info = FTS_ERR; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1372 SET(FTS_STOP); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1373 __set_errno (saved_errno); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1374 return (NULL); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1375 } |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1376 /* Did realloc() change the pointer? */ |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1377 if (oldaddr != sp->fts_path) { |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1378 doadjust = true; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1379 if (ISSET(FTS_NOCHDIR)) |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1380 cp = sp->fts_path + len; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1381 } |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1382 maxlen = sp->fts_pathlen - len; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1383 } |
5858 | 1384 |
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1385 new_len = len + _D_EXACT_NAMLEN (dp); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1386 if (new_len < len) { |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1387 /* |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1388 * 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
|
1389 * 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
|
1390 * the current structure and the structures already |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1391 * allocated, then error out with ENAMETOOLONG. |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1392 */ |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1393 free(p); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1394 fts_lfree(head); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1395 closedir(dirp); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1396 cur->fts_info = FTS_ERR; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1397 SET(FTS_STOP); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1398 __set_errno (ENAMETOOLONG); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1399 return (NULL); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1400 } |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1401 p->fts_level = level; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1402 p->fts_parent = sp->fts_cur; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1403 p->fts_pathlen = new_len; |
5858 | 1404 |
1405 #if defined FTS_WHITEOUT && 0 | |
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1406 if (dp->d_type == DT_WHT) |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1407 p->fts_flags |= FTS_ISW; |
5858 | 1408 #endif |
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1409 /* 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
|
1410 entries before processing them. */ |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1411 p->fts_statp->st_ino = D_INO (dp); |
5858 | 1412 |
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1413 /* 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
|
1414 if (ISSET(FTS_NOCHDIR)) { |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1415 p->fts_accpath = p->fts_path; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1416 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
|
1417 } else |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1418 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
|
1419 |
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1420 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
|
1421 /* 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
|
1422 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
|
1423 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
|
1424 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
|
1425 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
|
1426 symlinks (FTS_PHYSICAL) and d_type indicates this |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1427 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
|
1428 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
|
1429 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
|
1430 inode numbers. Some day we might optimize that |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1431 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
|
1432 be valid. */ |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1433 bool skip_stat = (ISSET(FTS_PHYSICAL) |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1434 && ISSET(FTS_NOSTAT) |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1435 && DT_IS_KNOWN(dp) |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1436 && ! DT_MUST_BE(dp, DT_DIR)); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1437 p->fts_info = FTS_NSOK; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1438 /* Propagate dirent.d_type information back |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1439 to caller, when possible. */ |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1440 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
|
1441 fts_set_stat_required(p, !skip_stat); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1442 is_dir = (ISSET(FTS_PHYSICAL) |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1443 && DT_MUST_BE(dp, DT_DIR)); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1444 } else { |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1445 p->fts_info = fts_stat(sp, p, false); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1446 is_dir = (p->fts_info == FTS_D |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1447 || p->fts_info == FTS_DC |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1448 || p->fts_info == FTS_DOT); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1449 } |
5858 | 1450 |
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1451 /* Decrement link count if applicable. */ |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1452 if (nlinks > 0 && is_dir) |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1453 nlinks -= nostat; |
5858 | 1454 |
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1455 /* 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
|
1456 p->fts_link = NULL; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1457 if (head == NULL) |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1458 head = tail = p; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1459 else { |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1460 tail->fts_link = p; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1461 tail = p; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1462 } |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1463 ++nitems; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1464 } |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1465 if (dirp) |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1466 closedir(dirp); |
5858 | 1467 |
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1468 /* |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1469 * 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
|
1470 * 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
|
1471 */ |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1472 if (doadjust) |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1473 fts_padjust(sp, head); |
5858 | 1474 |
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1475 /* |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1476 * 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
|
1477 * state. |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1478 */ |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1479 if (ISSET(FTS_NOCHDIR)) { |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1480 if (len == sp->fts_pathlen || nitems == 0) |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1481 --cp; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1482 *cp = '\0'; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1483 } |
5858 | 1484 |
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1485 /* |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1486 * 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
|
1487 * 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
|
1488 * 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
|
1489 * 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
|
1490 * can't get back, we're done. |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1491 */ |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1492 if (descend && (type == BCHILD || !nitems) && |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1493 (cur->fts_level == FTS_ROOTLEVEL |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1494 ? RESTORE_INITIAL_CWD(sp) |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1495 : fts_safe_changedir(sp, cur->fts_parent, -1, ".."))) { |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1496 cur->fts_info = FTS_ERR; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1497 SET(FTS_STOP); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1498 fts_lfree(head); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1499 return (NULL); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1500 } |
5858 | 1501 |
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1502 /* If didn't find anything, return NULL. */ |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1503 if (!nitems) { |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1504 if (type == BREAD) |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1505 cur->fts_info = FTS_DP; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1506 fts_lfree(head); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1507 return (NULL); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1508 } |
5858 | 1509 |
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1510 /* 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
|
1511 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
|
1512 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
|
1513 inode numbers. */ |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1514 if (nitems > _FTS_INODE_SORT_DIR_ENTRIES_THRESHOLD |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1515 && !sp->fts_compar |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1516 && ISSET (FTS_CWDFD) |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1517 && 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
|
1518 sp->fts_compar = fts_compare_ino; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1519 head = fts_sort (sp, head, nitems); |
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1520 sp->fts_compar = NULL; |
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|
1521 } |
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47fe4e48e158
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Jim Meyering <meyering@redhat.com>
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9718
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|
1522 |
12421
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1523 /* Sort the entries. */ |
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|
1524 if (sp->fts_compar && nitems > 1) |
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|
1525 head = fts_sort(sp, head, nitems); |
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|
1526 return (head); |
5858 | 1527 } |
1528 | |
1529 #if FTS_DEBUG | |
1530 | |
1531 /* Walk ->fts_parent links starting at E_CURR, until the root of the | |
1532 current hierarchy. There should be a directory with dev/inode | |
1533 matching those of AD. If not, print a lot of diagnostics. */ | |
1534 static void | |
1535 find_matching_ancestor (FTSENT const *e_curr, struct Active_dir const *ad) | |
1536 { | |
1537 FTSENT const *ent; | |
1538 for (ent = e_curr; ent->fts_level >= FTS_ROOTLEVEL; ent = ent->fts_parent) | |
1539 { | |
1540 if (ad->ino == ent->fts_statp->st_ino | |
12421
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diff
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|
1541 && ad->dev == ent->fts_statp->st_dev) |
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|
1542 return; |
5858 | 1543 } |
1544 printf ("ERROR: tree dir, %s, not active\n", ad->fts_ent->fts_accpath); | |
1545 printf ("active dirs:\n"); | |
1546 for (ent = e_curr; | |
1547 ent->fts_level >= FTS_ROOTLEVEL; ent = ent->fts_parent) | |
1548 printf (" %s(%"PRIuMAX"/%"PRIuMAX") to %s(%"PRIuMAX"/%"PRIuMAX")...\n", | |
12421
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|
1549 ad->fts_ent->fts_accpath, |
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|
1550 (uintmax_t) ad->dev, |
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1551 (uintmax_t) ad->ino, |
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1552 ent->fts_accpath, |
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|
1553 (uintmax_t) ent->fts_statp->st_dev, |
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|
1554 (uintmax_t) ent->fts_statp->st_ino); |
5858 | 1555 } |
1556 | |
1557 void | |
1558 fts_cross_check (FTS const *sp) | |
1559 { | |
1560 FTSENT const *ent = sp->fts_cur; | |
1561 FTSENT const *t; | |
1562 if ( ! ISSET (FTS_TIGHT_CYCLE_CHECK)) | |
1563 return; | |
1564 | |
1565 Dprintf (("fts-cross-check cur=%s\n", ent->fts_path)); | |
1566 /* Make sure every parent dir is in the tree. */ | |
1567 for (t = ent->fts_parent; t->fts_level >= FTS_ROOTLEVEL; t = t->fts_parent) | |
1568 { | |
1569 struct Active_dir ad; | |
1570 ad.ino = t->fts_statp->st_ino; | |
1571 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>
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diff
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|
1572 if ( ! hash_lookup (sp->fts_cycle.ht, &ad)) |
12421
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|
1573 printf ("ERROR: active dir, %s, not in tree\n", t->fts_path); |
5858 | 1574 } |
1575 | |
1576 /* Make sure every dir in the tree is an active dir. | |
1577 But ENT is not necessarily a directory. If so, just skip this part. */ | |
1578 if (ent->fts_parent->fts_level >= FTS_ROOTLEVEL | |
1579 && (ent->fts_info == FTS_DP | |
12421
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|
1580 || ent->fts_info == FTS_D)) |
5858 | 1581 { |
1582 struct Active_dir *ad; | |
6034
96149b1bbb32
(fts_cross_check) [FTS_DEBUG]: s/active_dir_ht/fts_cycle.ht/.
Jim Meyering <jim@meyering.net>
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diff
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|
1583 for (ad = hash_get_first (sp->fts_cycle.ht); ad != NULL; |
12421
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1584 ad = hash_get_next (sp->fts_cycle.ht, ad)) |
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|
1585 { |
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1586 find_matching_ancestor (ent, ad); |
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1587 } |
5858 | 1588 } |
1589 } | |
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|
1590 |
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|
1591 static bool |
1670d42131d7
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|
1592 same_fd (int fd1, int fd2) |
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|
1593 { |
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|
1594 struct stat sb1, sb2; |
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Make fts (in FTS_CWDFD mode) more efficient by caching a few open
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|
1595 return (fstat (fd1, &sb1) == 0 |
12421
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1596 && fstat (fd2, &sb2) == 0 |
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|
1597 && SAME_INODE (sb1, sb2)); |
7639
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Make fts (in FTS_CWDFD mode) more efficient by caching a few open
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|
1598 } |
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|
1599 |
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|
1600 static void |
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1601 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
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1602 { |
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Make fts (in FTS_CWDFD mode) more efficient by caching a few open
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|
1603 I_ring const *fd_ring = &sp->fts_fd_ring; |
1670d42131d7
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1604 unsigned int i = fd_ring->fts_front; |
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1605 char *cwd = getcwdat (sp->fts_cwd_fd, NULL, 0); |
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Make fts (in FTS_CWDFD mode) more efficient by caching a few open
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|
1606 fprintf (stream, "=== %s ========== %s\n", msg, cwd); |
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Make fts (in FTS_CWDFD mode) more efficient by caching a few open
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|
1607 free (cwd); |
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Make fts (in FTS_CWDFD mode) more efficient by caching a few open
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1608 if (i_ring_empty (fd_ring)) |
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|
1609 return; |
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1610 |
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1611 while (true) |
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1612 { |
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1613 int fd = fd_ring->fts_fd_ring[i]; |
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1614 if (fd < 0) |
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1615 fprintf (stream, "%d: %d:\n", i, fd); |
7639
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1616 else |
12421
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|
1617 { |
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1618 char *wd = getcwdat (fd, NULL, 0); |
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1619 fprintf (stream, "%d: %d: %s\n", i, fd, wd); |
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1620 free (wd); |
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1621 } |
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1622 if (i == fd_ring->fts_back) |
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1623 break; |
7639
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1624 i = (i + I_RING_SIZE - 1) % I_RING_SIZE; |
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1625 } |
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1626 } |
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|
1627 |
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|
1628 /* Ensure that each file descriptor on the fd_ring matches a |
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1629 parent, grandparent, etc. of the current working directory. */ |
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1630 static void |
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|
1631 fd_ring_check (FTS const *sp) |
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1632 { |
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|
1633 if (!fts_debug) |
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|
1634 return; |
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1635 |
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1636 /* Make a writable copy. */ |
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1637 I_ring fd_w = sp->fts_fd_ring; |
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1638 |
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1639 int cwd_fd = sp->fts_cwd_fd; |
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1640 cwd_fd = dup (cwd_fd); |
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1641 char *dot = getcwdat (cwd_fd, NULL, 0); |
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1642 error (0, 0, "===== check ===== cwd: %s", dot); |
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1643 free (dot); |
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1644 while ( ! i_ring_empty (&fd_w)) |
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1645 { |
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1646 int fd = i_ring_pop (&fd_w); |
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1647 if (0 <= fd) |
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1648 { |
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1649 int parent_fd = openat (cwd_fd, "..", O_RDONLY); |
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1650 if (parent_fd < 0) |
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1651 { |
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1652 // Warn? |
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1653 break; |
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1654 } |
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1655 if (!same_fd (fd, parent_fd)) |
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1656 { |
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1657 char *cwd = getcwdat (fd, NULL, 0); |
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1658 error (0, errno, "ring : %s", cwd); |
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1659 char *c2 = getcwdat (parent_fd, NULL, 0); |
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1660 error (0, errno, "parent: %s", c2); |
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1661 free (cwd); |
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|
1662 free (c2); |
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|
1663 fts_assert (0); |
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1664 } |
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1665 close (cwd_fd); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1666 cwd_fd = parent_fd; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1667 } |
7639
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
1668 } |
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
1669 close (cwd_fd); |
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
1670 } |
5858 | 1671 #endif |
1672 | |
1673 static unsigned short int | |
1674 internal_function | |
1675 fts_stat(FTS *sp, register FTSENT *p, bool follow) | |
1676 { | |
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1677 struct stat *sbp = p->fts_statp; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1678 int saved_errno; |
5858 | 1679 |
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1680 if (p->fts_level == FTS_ROOTLEVEL && ISSET(FTS_COMFOLLOW)) |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1681 follow = true; |
7482
26914593f079
Big performance improvement for fts-based tools that use FTS_NOSTAT.
Jim Meyering <jim@meyering.net>
parents:
7408
diff
changeset
|
1682 |
5858 | 1683 #if defined FTS_WHITEOUT && 0 |
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1684 /* check for whiteout */ |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1685 if (p->fts_flags & FTS_ISW) { |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1686 memset(sbp, '\0', sizeof (*sbp)); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1687 sbp->st_mode = S_IFWHT; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1688 return (FTS_W); |
5858 | 1689 } |
1690 #endif | |
1691 | |
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1692 /* |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1693 * If doing a logical walk, or application requested FTS_FOLLOW, do |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1694 * a stat(2). If that fails, check for a non-existent symlink. If |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1695 * fail, set the errno from the stat call. |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1696 */ |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1697 if (ISSET(FTS_LOGICAL) || follow) { |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1698 if (stat(p->fts_accpath, sbp)) { |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1699 saved_errno = errno; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1700 if (errno == ENOENT |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1701 && lstat(p->fts_accpath, sbp) == 0) { |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1702 __set_errno (0); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1703 return (FTS_SLNONE); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1704 } |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1705 p->fts_errno = saved_errno; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1706 goto err; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1707 } |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1708 } 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
|
1709 AT_SYMLINK_NOFOLLOW)) { |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1710 p->fts_errno = errno; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1711 err: memset(sbp, 0, sizeof(struct stat)); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1712 return (FTS_NS); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1713 } |
5858 | 1714 |
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1715 if (S_ISDIR(sbp->st_mode)) { |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1716 p->fts_n_dirs_remaining = (sbp->st_nlink |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1717 - (ISSET(FTS_SEEDOT) ? 0 : 2)); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1718 if (ISDOT(p->fts_name)) { |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1719 /* Command-line "." and ".." are real directories. */ |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1720 return (p->fts_level == FTS_ROOTLEVEL ? FTS_D : FTS_DOT); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1721 } |
5872 | 1722 |
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1723 return (FTS_D); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1724 } |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1725 if (S_ISLNK(sbp->st_mode)) |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1726 return (FTS_SL); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1727 if (S_ISREG(sbp->st_mode)) |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1728 return (FTS_F); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1729 return (FTS_DEFAULT); |
5858 | 1730 } |
1731 | |
1732 static int | |
1733 fts_compar (void const *a, void const *b) | |
1734 { | |
1735 /* Convert A and B to the correct types, to pacify the compiler, and | |
1736 for portability to bizarre hosts where "void const *" and "FTSENT | |
1737 const **" differ in runtime representation. The comparison | |
1738 function cannot modify *a and *b, but there is no compile-time | |
1739 check for this. */ | |
1740 FTSENT const **pa = (FTSENT const **) a; | |
1741 FTSENT const **pb = (FTSENT const **) b; | |
1742 return pa[0]->fts_fts->fts_compar (pa, pb); | |
1743 } | |
1744 | |
1745 static FTSENT * | |
1746 internal_function | |
1747 fts_sort (FTS *sp, FTSENT *head, register size_t nitems) | |
1748 { | |
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1749 register FTSENT **ap, *p; |
5858 | 1750 |
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1751 /* On most modern hosts, void * and FTSENT ** have the same |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1752 run-time representation, and one can convert sp->fts_compar to |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1753 the type qsort expects without problem. Use the heuristic that |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1754 this is OK if the two pointer types are the same size, and if |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1755 converting FTSENT ** to long int is the same as converting |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1756 FTSENT ** to void * and then to long int. This heuristic isn't |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1757 valid in general but we don't know of any counterexamples. */ |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1758 FTSENT *dummy; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1759 int (*compare) (void const *, void const *) = |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1760 ((sizeof &dummy == sizeof (void *) |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1761 && (long int) &dummy == (long int) (void *) &dummy) |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1762 ? (int (*) (void const *, void const *)) sp->fts_compar |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1763 : fts_compar); |
5858 | 1764 |
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1765 /* |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1766 * Construct an array of pointers to the structures and call qsort(3). |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1767 * Reassemble the array in the order returned by qsort. If unable to |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1768 * sort for memory reasons, return the directory entries in their |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1769 * current order. Allocate enough space for the current needs plus |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1770 * 40 so don't realloc one entry at a time. |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1771 */ |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1772 if (nitems > sp->fts_nitems) { |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1773 FTSENT **a; |
5858 | 1774 |
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1775 sp->fts_nitems = nitems + 40; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1776 if (SIZE_MAX / sizeof *a < sp->fts_nitems |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1777 || ! (a = realloc (sp->fts_array, |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1778 sp->fts_nitems * sizeof *a))) { |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1779 free(sp->fts_array); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1780 sp->fts_array = NULL; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1781 sp->fts_nitems = 0; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1782 return (head); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1783 } |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1784 sp->fts_array = a; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1785 } |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1786 for (ap = sp->fts_array, p = head; p; p = p->fts_link) |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1787 *ap++ = p; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1788 qsort((void *)sp->fts_array, nitems, sizeof(FTSENT *), compare); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1789 for (head = *(ap = sp->fts_array); --nitems; ++ap) |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1790 ap[0]->fts_link = ap[1]; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1791 ap[0]->fts_link = NULL; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1792 return (head); |
5858 | 1793 } |
1794 | |
1795 static FTSENT * | |
1796 internal_function | |
1797 fts_alloc (FTS *sp, const char *name, register size_t namelen) | |
1798 { | |
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1799 register FTSENT *p; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1800 size_t len; |
5858 | 1801 |
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1802 /* |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1803 * The file name is a variable length array. Allocate the FTSENT |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1804 * structure and the file name in one chunk. |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1805 */ |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1806 len = sizeof(FTSENT) + namelen; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1807 if ((p = malloc(len)) == NULL) |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1808 return (NULL); |
5858 | 1809 |
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1810 /* Copy the name and guarantee NUL termination. */ |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1811 memmove(p->fts_name, name, namelen); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1812 p->fts_name[namelen] = '\0'; |
5858 | 1813 |
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1814 p->fts_namelen = namelen; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1815 p->fts_fts = sp; |
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1816 p->fts_path = sp->fts_path; |
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1817 p->fts_errno = 0; |
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1818 p->fts_flags = 0; |
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1819 p->fts_instr = FTS_NOINSTR; |
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1820 p->fts_number = 0; |
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1821 p->fts_pointer = NULL; |
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1822 return (p); |
5858 | 1823 } |
1824 | |
1825 static void | |
1826 internal_function | |
1827 fts_lfree (register FTSENT *head) | |
1828 { | |
12421
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1829 register FTSENT *p; |
5858 | 1830 |
12421
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1831 /* Free a linked list of structures. */ |
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1832 while ((p = head)) { |
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1833 head = head->fts_link; |
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1834 free(p); |
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1835 } |
5858 | 1836 } |
1837 | |
1838 /* | |
5907 | 1839 * Allow essentially unlimited file name lengths; find, rm, ls should |
1840 * all work on any tree. Most systems will allow creation of file | |
1841 * names much longer than MAXPATHLEN, even though the kernel won't | |
1842 * resolve them. Add the size (not just what's needed) plus 256 bytes | |
1843 * so don't realloc the file name 2 bytes at a time. | |
5858 | 1844 */ |
1845 static bool | |
1846 internal_function | |
1847 fts_palloc (FTS *sp, size_t more) | |
1848 { | |
12421
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1849 char *p; |
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1850 size_t new_len = sp->fts_pathlen + more + 256; |
5858 | 1851 |
12421
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|
1852 /* |
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1853 * See if fts_pathlen would overflow. |
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|
1854 */ |
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1855 if (new_len < sp->fts_pathlen) { |
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1856 free(sp->fts_path); |
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1857 sp->fts_path = NULL; |
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1858 __set_errno (ENAMETOOLONG); |
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1859 return false; |
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Use spaces for indentation, not tabs.
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1860 } |
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1861 sp->fts_pathlen = new_len; |
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1862 p = realloc(sp->fts_path, sp->fts_pathlen); |
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1863 if (p == NULL) { |
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1864 free(sp->fts_path); |
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1865 sp->fts_path = NULL; |
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1866 return false; |
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1867 } |
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1868 sp->fts_path = p; |
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1869 return true; |
5858 | 1870 } |
1871 | |
1872 /* | |
5907 | 1873 * When the file name is realloc'd, have to fix all of the pointers in |
1874 * structures already returned. | |
5858 | 1875 */ |
1876 static void | |
1877 internal_function | |
1878 fts_padjust (FTS *sp, FTSENT *head) | |
1879 { | |
12421
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1880 FTSENT *p; |
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1881 char *addr = sp->fts_path; |
5858 | 1882 |
12421
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1883 #define ADJUST(p) do { \ |
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1884 if ((p)->fts_accpath != (p)->fts_name) { \ |
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1885 (p)->fts_accpath = \ |
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1886 (char *)addr + ((p)->fts_accpath - (p)->fts_path); \ |
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1887 } \ |
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1888 (p)->fts_path = addr; \ |
5858 | 1889 } while (0) |
12421
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1890 /* Adjust the current set of children. */ |
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1891 for (p = sp->fts_child; p; p = p->fts_link) |
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1892 ADJUST(p); |
5858 | 1893 |
12421
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1894 /* Adjust the rest of the tree, including the current level. */ |
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1895 for (p = head; p->fts_level >= FTS_ROOTLEVEL;) { |
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1896 ADJUST(p); |
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1897 p = p->fts_link ? p->fts_link : p->fts_parent; |
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1898 } |
5858 | 1899 } |
1900 | |
1901 static size_t | |
1902 internal_function | |
1903 fts_maxarglen (char * const *argv) | |
1904 { | |
12421
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1905 size_t len, max; |
5858 | 1906 |
12421
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1907 for (max = 0; *argv; ++argv) |
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1908 if ((len = strlen(*argv)) > max) |
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1909 max = len; |
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1910 return (max + 1); |
5858 | 1911 } |
1912 | |
1913 /* | |
5907 | 1914 * Change to dir specified by fd or file name without getting |
5858 | 1915 * tricked by someone changing the world out from underneath us. |
1916 * Assumes p->fts_statp->st_dev and p->fts_statp->st_ino are filled in. | |
7151 | 1917 * If FD is non-negative, expect it to be used after this function returns, |
1918 * and to be closed eventually. So don't pass e.g., `dirfd(dirp)' and then | |
1919 * do closedir(dirp), because that would invalidate the saved FD. | |
1920 * Upon failure, close FD immediately and return nonzero. | |
5858 | 1921 */ |
1922 static int | |
1923 internal_function | |
5907 | 1924 fts_safe_changedir (FTS *sp, FTSENT *p, int fd, char const *dir) |
5858 | 1925 { |
12421
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1926 int ret; |
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1927 bool is_dotdot = dir && STREQ (dir, ".."); |
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1928 int newfd; |
7623
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1929 |
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1930 /* This clause handles the unusual case in which FTS_NOCHDIR |
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1931 is specified, along with FTS_CWDFD. In that case, there is |
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1932 no need to change even the virtual cwd file descriptor. |
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1933 However, if FD is non-negative, we do close it here. */ |
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1934 if (ISSET (FTS_NOCHDIR)) |
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1935 { |
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1936 if (ISSET (FTS_CWDFD) && 0 <= fd) |
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1937 close (fd); |
e8d2c6fc33ad
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1938 return 0; |
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1939 } |
5858 | 1940 |
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1941 if (fd < 0 && is_dotdot && ISSET (FTS_CWDFD)) |
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1942 { |
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1943 /* When possible, skip the diropen and subsequent fstat+dev/ino |
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1944 comparison. I.e., when changing to parent directory |
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1945 (chdir ("..")), use a file descriptor from the ring and |
e8d2c6fc33ad
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1946 save the overhead of diropen+fstat, as well as avoiding |
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1947 failure when we lack "x" access to the virtual cwd. */ |
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1948 if ( ! i_ring_empty (&sp->fts_fd_ring)) |
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1949 { |
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1950 int parent_fd; |
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1951 fd_ring_print (sp, stderr, "pre-pop"); |
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1952 parent_fd = i_ring_pop (&sp->fts_fd_ring); |
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1953 is_dotdot = true; |
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1954 if (0 <= parent_fd) |
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|
1955 { |
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1956 fd = parent_fd; |
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1957 dir = NULL; |
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|
1958 } |
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|
1959 } |
e8d2c6fc33ad
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|
1960 } |
7639
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
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|
1961 |
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1962 newfd = fd; |
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1963 if (fd < 0 && (newfd = diropen (sp, dir)) < 0) |
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|
1964 return -1; |
7639
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|
1965 |
12421
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1966 /* The following dev/inode check is necessary if we're doing a |
e8d2c6fc33ad
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1967 `logical' traversal (through symlinks, a la chown -L), if the |
e8d2c6fc33ad
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|
1968 system lacks O_NOFOLLOW support, or if we're changing to ".." |
e8d2c6fc33ad
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|
1969 (but not via a popped file descriptor). When changing to the |
e8d2c6fc33ad
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1970 name "..", O_NOFOLLOW can't help. In general, when the target is |
e8d2c6fc33ad
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1971 not "..", diropen's use of O_NOFOLLOW ensures we don't mistakenly |
e8d2c6fc33ad
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|
1972 follow a symlink, so we can avoid the expense of this fstat. */ |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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1973 if (ISSET(FTS_LOGICAL) || ! HAVE_WORKING_O_NOFOLLOW |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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1974 || (dir && STREQ (dir, ".."))) |
e8d2c6fc33ad
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|
1975 { |
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Use spaces for indentation, not tabs.
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|
1976 struct stat sb; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
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|
1977 if (fstat(newfd, &sb)) |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1978 { |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1979 ret = -1; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1980 goto bail; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1981 } |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1982 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
|
1983 || p->fts_statp->st_ino != sb.st_ino) |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1984 { |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1985 __set_errno (ENOENT); /* disinformation */ |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1986 ret = -1; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1987 goto bail; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1988 } |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1989 } |
7151 | 1990 |
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1991 if (ISSET(FTS_CWDFD)) |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1992 { |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1993 cwd_advance_fd (sp, newfd, ! is_dotdot); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1994 return 0; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1995 } |
7151 | 1996 |
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1997 ret = fchdir(newfd); |
5858 | 1998 bail: |
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
1999 if (fd < 0) |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
2000 { |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
2001 int oerrno = errno; |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
2002 (void)close(newfd); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
2003 __set_errno (oerrno); |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
2004 } |
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
12378
diff
changeset
|
2005 return ret; |
5858 | 2006 } |