Mercurial > gnulib
annotate lib/fts.c @ 11163:f448fc8fe832
fts: move a function definition "up" (no semantic change)
* lib/fts.c (dirent_inode_sort_may_be_useful): Move definition
"up" to precede upcoming use of a related function.
| author | Jim Meyering <meyering@redhat.com> |
|---|---|
| date | Wed, 11 Feb 2009 21:08:11 +0100 |
| parents | 15e1c0e6fd35 |
| children | 90715da41753 |
| rev | line source |
|---|---|
| 5858 | 1 /* Traverse a file hierarchy. |
| 2 | |
|
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fts: move a function definition "up" (no semantic change)
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3 Copyright (C) 2004-2009 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 | |
| 20 * The Regents of the University of California. All rights reserved. | |
| 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) | |
| 50 static char sccsid[] = "@(#)fts.c 8.6 (Berkeley) 8/14/94"; | |
| 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" |
| 72 # include "openat.h" | |
| 73 # include "unistd--.h" | |
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74 # include "same-inode.h" |
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75 #endif |
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76 |
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* backupfile.c, dirfd.h, fts.c, getcwd.c, glob.c, glob_.h:
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77 #include <dirent.h> |
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78 #ifndef _D_EXACT_NAMLEN |
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79 # define _D_EXACT_NAMLEN(dirent) strlen ((dirent)->d_name) |
| 5858 | 80 #endif |
| 81 | |
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82 #if HAVE_STRUCT_DIRENT_D_TYPE |
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83 /* True if the type of the directory entry D is known. */ |
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84 # define DT_IS_KNOWN(d) ((d)->d_type != DT_UNKNOWN) |
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85 /* True if the type of the directory entry D must be T. */ |
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86 # define DT_MUST_BE(d, t) ((d)->d_type == (t)) |
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87 # define D_TYPE(d) ((d)->d_type) |
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88 #else |
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89 # define DT_IS_KNOWN(d) false |
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90 # define DT_MUST_BE(d, t) false |
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91 # define D_TYPE(d) DT_UNKNOWN |
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92 |
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93 # undef DT_UNKNOWN |
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94 # define DT_UNKNOWN 0 |
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95 |
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96 /* Any nonzero values will do here, so long as they're distinct. |
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97 Undef any existing macros out of the way. */ |
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98 # undef DT_BLK |
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99 # undef DT_CHR |
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100 # undef DT_DIR |
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101 # undef DT_FIFO |
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102 # undef DT_LNK |
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103 # undef DT_REG |
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104 # undef DT_SOCK |
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105 # define DT_BLK 1 |
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106 # define DT_CHR 2 |
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107 # define DT_DIR 3 |
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108 # define DT_FIFO 4 |
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109 # define DT_LNK 5 |
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110 # define DT_REG 6 |
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111 # define DT_SOCK 7 |
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112 #endif |
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113 |
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114 #ifndef S_IFLNK |
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115 # define S_IFLNK 0 |
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116 #endif |
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117 #ifndef S_IFSOCK |
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118 # define S_IFSOCK 0 |
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119 #endif |
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120 |
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121 enum |
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122 { |
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123 NOT_AN_INODE_NUMBER = 0 |
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124 }; |
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125 |
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126 #ifdef D_INO_IN_DIRENT |
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127 # define D_INO(dp) (dp)->d_ino |
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128 #else |
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129 /* Some systems don't have inodes, so fake them to avoid lots of ifdefs. */ |
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130 # define D_INO(dp) NOT_AN_INODE_NUMBER |
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131 #endif |
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132 |
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133 /* If there are more than this many entries in a directory, |
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134 and the conditions mentioned below are satisfied, then sort |
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135 the entries on inode number before any further processing. */ |
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136 #ifndef FTS_INODE_SORT_DIR_ENTRIES_THRESHOLD |
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137 # define FTS_INODE_SORT_DIR_ENTRIES_THRESHOLD 10000 |
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138 #endif |
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139 enum |
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140 { |
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141 _FTS_INODE_SORT_DIR_ENTRIES_THRESHOLD = FTS_INODE_SORT_DIR_ENTRIES_THRESHOLD |
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142 }; |
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143 |
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144 enum Fts_stat |
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145 { |
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146 FTS_NO_STAT_REQUIRED = 1, |
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147 FTS_STAT_REQUIRED = 2 |
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148 }; |
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149 |
| 5858 | 150 #ifdef _LIBC |
| 151 # undef close | |
| 152 # define close __close | |
| 153 # undef closedir | |
| 154 # define closedir __closedir | |
| 155 # undef fchdir | |
| 156 # define fchdir __fchdir | |
| 157 # undef open | |
| 158 # define open __open | |
| 159 # undef opendir | |
| 160 # define opendir __opendir | |
| 161 # undef readdir | |
| 162 # define readdir __readdir | |
| 163 #else | |
| 164 # undef internal_function | |
| 165 # define internal_function /* empty */ | |
| 166 #endif | |
| 167 | |
| 168 #ifndef __set_errno | |
| 169 # define __set_errno(Val) errno = (Val) | |
| 170 #endif | |
| 171 | |
| 172 #ifndef __attribute__ | |
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173 # if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 8) |
| 5858 | 174 # define __attribute__(x) /* empty */ |
| 175 # endif | |
| 176 #endif | |
| 177 | |
| 178 #ifndef ATTRIBUTE_UNUSED | |
| 179 # define ATTRIBUTE_UNUSED __attribute__ ((__unused__)) | |
| 180 #endif | |
| 181 | |
| 7151 | 182 /* If this host provides the openat function, then we can avoid |
| 183 attempting to open "." in some initialization code below. */ | |
| 184 #ifdef HAVE_OPENAT | |
| 185 # define HAVE_OPENAT_SUPPORT 1 | |
| 186 #else | |
| 187 # define HAVE_OPENAT_SUPPORT 0 | |
| 188 #endif | |
| 5858 | 189 |
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190 #ifdef NDEBUG |
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191 # define fts_assert(expr) ((void) 0) |
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192 #else |
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193 # define fts_assert(expr) \ |
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194 do \ |
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195 { \ |
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196 if (!(expr)) \ |
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197 abort (); \ |
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198 } \ |
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199 while (false) |
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200 #endif |
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201 |
| 5858 | 202 static FTSENT *fts_alloc (FTS *, const char *, size_t) internal_function; |
| 203 static FTSENT *fts_build (FTS *, int) internal_function; | |
| 204 static void fts_lfree (FTSENT *) internal_function; | |
| 205 static void fts_load (FTS *, FTSENT *) internal_function; | |
| 206 static size_t fts_maxarglen (char * const *) internal_function; | |
| 207 static void fts_padjust (FTS *, FTSENT *) internal_function; | |
| 208 static bool fts_palloc (FTS *, size_t) internal_function; | |
| 209 static FTSENT *fts_sort (FTS *, FTSENT *, size_t) internal_function; | |
| 210 static unsigned short int fts_stat (FTS *, FTSENT *, bool) internal_function; | |
| 211 static int fts_safe_changedir (FTS *, FTSENT *, int, const char *) | |
| 212 internal_function; | |
| 213 | |
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214 #if GNULIB_FTS |
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215 # include "fts-cycle.c" |
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216 #else |
| 5872 | 217 static bool enter_dir (FTS *fts, FTSENT *ent) { return true; } |
| 218 static void leave_dir (FTS *fts, FTSENT *ent) {} | |
| 219 static bool setup_dir (FTS *fts) { return true; } | |
| 220 static void free_dir (FTS *fts) {} | |
| 221 #endif | |
| 222 | |
| 5858 | 223 #ifndef MAX |
| 224 # define MAX(a,b) ((a) > (b) ? (a) : (b)) | |
| 225 #endif | |
| 226 | |
| 227 #ifndef SIZE_MAX | |
| 228 # define SIZE_MAX ((size_t) -1) | |
| 229 #endif | |
| 230 | |
| 231 #ifndef O_DIRECTORY | |
| 232 # define O_DIRECTORY 0 | |
| 233 #endif | |
| 234 | |
| 235 #define ISDOT(a) (a[0] == '.' && (!a[1] || (a[1] == '.' && !a[2]))) | |
| 7151 | 236 #define STREQ(a, b) (strcmp ((a), (b)) == 0) |
| 5858 | 237 |
| 238 #define CLR(opt) (sp->fts_options &= ~(opt)) | |
| 239 #define ISSET(opt) (sp->fts_options & (opt)) | |
| 240 #define SET(opt) (sp->fts_options |= (opt)) | |
| 241 | |
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242 /* FIXME: make this a function */ |
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243 #define RESTORE_INITIAL_CWD(sp) \ |
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244 (fd_ring_clear (&((sp)->fts_fd_ring)), \ |
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245 FCHDIR ((sp), (ISSET (FTS_CWDFD) ? AT_FDCWD : (sp)->fts_rfd))) |
| 7151 | 246 |
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247 /* FIXME: FTS_NOCHDIR is now misnamed. |
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248 Call it FTS_USE_FULL_RELATIVE_FILE_NAMES instead. */ |
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249 #define FCHDIR(sp, fd) \ |
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250 (!ISSET(FTS_NOCHDIR) && (ISSET(FTS_CWDFD) \ |
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251 ? (cwd_advance_fd ((sp), (fd), true), 0) \ |
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252 : fchdir (fd))) |
| 7151 | 253 |
| 5858 | 254 |
| 255 /* fts_build flags */ | |
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256 /* FIXME: make this an enum */ |
| 5858 | 257 #define BCHILD 1 /* fts_children */ |
| 258 #define BNAMES 2 /* fts_children, names only */ | |
| 259 #define BREAD 3 /* fts_read */ | |
| 260 | |
| 261 #if FTS_DEBUG | |
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262 # include <inttypes.h> |
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263 # include <stdint.h> |
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264 # include <stdio.h> |
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265 # include "getcwdat.h" |
| 5858 | 266 bool fts_debug = false; |
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267 # define Dprintf(x) do { if (fts_debug) printf x; } while (false) |
| 5858 | 268 #else |
| 269 # define Dprintf(x) | |
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270 # define fd_ring_check(x) |
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271 # define fd_ring_print(a, b, c) |
| 5858 | 272 #endif |
| 273 | |
| 274 #define LEAVE_DIR(Fts, Ent, Tag) \ | |
| 5872 | 275 do \ |
| 276 { \ | |
| 5858 | 277 Dprintf ((" %s-leaving: %s\n", Tag, (Ent)->fts_path)); \ |
| 5872 | 278 leave_dir (Fts, Ent); \ |
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279 fd_ring_check (Fts); \ |
| 5872 | 280 } \ |
| 281 while (false) | |
| 5858 | 282 |
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283 static void |
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284 fd_ring_clear (I_ring *fd_ring) |
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285 { |
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286 while ( ! i_ring_empty (fd_ring)) |
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287 { |
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288 int fd = i_ring_pop (fd_ring); |
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289 if (0 <= fd) |
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290 close (fd); |
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291 } |
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292 } |
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293 |
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294 /* Overload the fts_statp->st_size member (otherwise unused, when |
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295 fts_info is FTS_NSOK) to indicate whether fts_read should stat |
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296 this entry or not. */ |
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297 static void |
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298 fts_set_stat_required (FTSENT *p, bool required) |
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299 { |
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300 fts_assert (p->fts_info == FTS_NSOK); |
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301 p->fts_statp->st_size = (required |
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302 ? FTS_STAT_REQUIRED |
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303 : FTS_NO_STAT_REQUIRED); |
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304 } |
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305 |
| 7151 | 306 /* file-descriptor-relative opendir. */ |
| 307 /* FIXME: if others need this function, move it into lib/openat.c */ | |
| 308 static inline DIR * | |
| 309 internal_function | |
| 310 opendirat (int fd, char const *dir) | |
| 311 { | |
| 312 int new_fd = openat (fd, dir, O_RDONLY); | |
| 313 DIR *dirp; | |
| 314 | |
| 315 if (new_fd < 0) | |
| 316 return NULL; | |
| 317 dirp = fdopendir (new_fd); | |
| 318 if (dirp == NULL) | |
| 319 { | |
| 320 int saved_errno = errno; | |
| 321 close (new_fd); | |
| 322 errno = saved_errno; | |
| 323 } | |
| 324 return dirp; | |
| 325 } | |
| 326 | |
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327 /* Virtual fchdir. Advance SP's working directory file descriptor, |
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328 SP->fts_cwd_fd, to FD, and push the previous value onto the fd_ring. |
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329 CHDIR_DOWN_ONE is true if FD corresponds to an entry in the directory |
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330 open on sp->fts_cwd_fd; i.e., to move the working directory one level |
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331 down. */ |
| 7151 | 332 static void |
| 333 internal_function | |
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334 cwd_advance_fd (FTS *sp, int fd, bool chdir_down_one) |
| 7151 | 335 { |
| 336 int old = sp->fts_cwd_fd; | |
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337 fts_assert (old != fd || old == AT_FDCWD); |
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338 |
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339 if (chdir_down_one) |
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340 { |
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341 /* Push "old" onto the ring. |
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342 If the displaced file descriptor is non-negative, close it. */ |
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343 int prev_fd_in_slot = i_ring_push (&sp->fts_fd_ring, old); |
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344 fd_ring_print (sp, stderr, "post-push"); |
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345 if (0 <= prev_fd_in_slot) |
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346 close (prev_fd_in_slot); /* ignore any close failure */ |
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347 } |
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348 else if ( ! ISSET (FTS_NOCHDIR)) |
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349 { |
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350 if (0 <= old) |
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351 close (old); /* ignore any close failure */ |
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352 } |
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353 |
| 7151 | 354 sp->fts_cwd_fd = fd; |
| 355 } | |
| 356 | |
| 5858 | 357 /* Open the directory DIR if possible, and return a file |
| 358 descriptor. Return -1 and set errno on failure. It doesn't matter | |
| 359 whether the file descriptor has read or write access. */ | |
| 360 | |
| 7151 | 361 static inline int |
| 5858 | 362 internal_function |
| 7151 | 363 diropen (FTS const *sp, char const *dir) |
| 5858 | 364 { |
| 7151 | 365 int open_flags = (O_RDONLY | O_DIRECTORY | O_NOCTTY | O_NONBLOCK |
| 366 | (ISSET (FTS_PHYSICAL) ? O_NOFOLLOW : 0)); | |
| 367 | |
| 368 return (ISSET (FTS_CWDFD) | |
| 369 ? openat (sp->fts_cwd_fd, dir, open_flags) | |
| 370 : open (dir, open_flags)); | |
| 5858 | 371 } |
| 372 | |
| 373 FTS * | |
| 374 fts_open (char * const *argv, | |
| 375 register int options, | |
| 376 int (*compar) (FTSENT const **, FTSENT const **)) | |
| 377 { | |
| 378 register FTS *sp; | |
| 379 register FTSENT *p, *root; | |
| 380 register size_t nitems; | |
| 7151 | 381 FTSENT *parent = NULL; |
| 382 FTSENT *tmp = NULL; /* pacify gcc */ | |
| 5858 | 383 size_t len; |
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384 bool defer_stat; |
| 5858 | 385 |
| 386 /* Options check. */ | |
| 387 if (options & ~FTS_OPTIONMASK) { | |
| 388 __set_errno (EINVAL); | |
| 389 return (NULL); | |
| 390 } | |
| 7151 | 391 if ((options & FTS_NOCHDIR) && (options & FTS_CWDFD)) { |
| 392 __set_errno (EINVAL); | |
| 393 return (NULL); | |
| 394 } | |
| 395 if ( ! (options & (FTS_LOGICAL | FTS_PHYSICAL))) { | |
| 396 __set_errno (EINVAL); | |
| 397 return (NULL); | |
| 398 } | |
| 5858 | 399 |
| 400 /* Allocate/initialize the stream */ | |
| 401 if ((sp = malloc(sizeof(FTS))) == NULL) | |
| 402 return (NULL); | |
| 403 memset(sp, 0, sizeof(FTS)); | |
| 404 sp->fts_compar = compar; | |
| 405 sp->fts_options = options; | |
| 406 | |
| 407 /* Logical walks turn on NOCHDIR; symbolic links are too hard. */ | |
| 7151 | 408 if (ISSET(FTS_LOGICAL)) { |
| 5858 | 409 SET(FTS_NOCHDIR); |
| 7151 | 410 CLR(FTS_CWDFD); |
| 411 } | |
| 412 | |
| 413 /* Initialize fts_cwd_fd. */ | |
| 414 sp->fts_cwd_fd = AT_FDCWD; | |
| 415 if ( ISSET(FTS_CWDFD) && ! HAVE_OPENAT_SUPPORT) | |
| 416 { | |
| 417 /* While it isn't technically necessary to open "." this | |
| 418 early, doing it here saves us the trouble of ensuring | |
| 419 later (where it'd be messier) that "." can in fact | |
| 420 be opened. If not, revert to FTS_NOCHDIR mode. */ | |
| 421 int fd = open (".", O_RDONLY); | |
| 422 if (fd < 0) | |
| 423 { | |
| 424 /* Even if `.' is unreadable, don't revert to FTS_NOCHDIR mode | |
| 425 on systems like Linux+PROC_FS, where our openat emulation | |
| 426 is good enough. Note: on a system that emulates | |
| 427 openat via /proc, this technique can still fail, but | |
| 428 only in extreme conditions, e.g., when the working | |
| 429 directory cannot be saved (i.e. save_cwd fails) -- | |
|
7402
82dc76cfd521
* fts.c (fts_open): Tiny comment change.
Jim Meyering <jim@meyering.net>
parents:
7396
diff
changeset
|
430 and that happens on Linux only when "." is unreadable |
| 7151 | 431 and the CWD would be longer than PATH_MAX. |
| 432 FIXME: once Linux kernel openat support is well established, | |
| 433 replace the above open call and this entire if/else block | |
| 434 with the body of the if-block below. */ | |
| 435 if ( openat_needs_fchdir ()) | |
| 436 { | |
| 437 SET(FTS_NOCHDIR); | |
| 438 CLR(FTS_CWDFD); | |
| 439 } | |
| 440 } | |
| 441 else | |
| 442 { | |
| 443 close (fd); | |
| 444 } | |
| 445 } | |
| 5858 | 446 |
| 447 /* | |
| 5907 | 448 * Start out with 1K of file name space, and enough, in any case, |
| 449 * to hold the user's file names. | |
| 5858 | 450 */ |
| 451 #ifndef MAXPATHLEN | |
| 452 # define MAXPATHLEN 1024 | |
| 453 #endif | |
|
6611
e4456c51dde7
Sync from the stable (b5) branch of coreutils:
Jim Meyering <jim@meyering.net>
parents:
6540
diff
changeset
|
454 { |
|
e4456c51dde7
Sync from the stable (b5) branch of coreutils:
Jim Meyering <jim@meyering.net>
parents:
6540
diff
changeset
|
455 size_t maxarglen = fts_maxarglen(argv); |
|
e4456c51dde7
Sync from the stable (b5) branch of coreutils:
Jim Meyering <jim@meyering.net>
parents:
6540
diff
changeset
|
456 if (! fts_palloc(sp, MAX(maxarglen, MAXPATHLEN))) |
|
e4456c51dde7
Sync from the stable (b5) branch of coreutils:
Jim Meyering <jim@meyering.net>
parents:
6540
diff
changeset
|
457 goto mem1; |
|
e4456c51dde7
Sync from the stable (b5) branch of coreutils:
Jim Meyering <jim@meyering.net>
parents:
6540
diff
changeset
|
458 } |
| 5858 | 459 |
| 460 /* Allocate/initialize root's parent. */ | |
| 7151 | 461 if (*argv != NULL) { |
| 462 if ((parent = fts_alloc(sp, "", 0)) == NULL) | |
| 463 goto mem2; | |
| 464 parent->fts_level = FTS_ROOTPARENTLEVEL; | |
| 465 } | |
| 5858 | 466 |
|
7482
26914593f079
Big performance improvement for fts-based tools that use FTS_NOSTAT.
Jim Meyering <jim@meyering.net>
parents:
7408
diff
changeset
|
467 /* The classic fts implementation would call fts_stat with |
|
26914593f079
Big performance improvement for fts-based tools that use FTS_NOSTAT.
Jim Meyering <jim@meyering.net>
parents:
7408
diff
changeset
|
468 a new entry for each iteration of the loop below. |
|
26914593f079
Big performance improvement for fts-based tools that use FTS_NOSTAT.
Jim Meyering <jim@meyering.net>
parents:
7408
diff
changeset
|
469 If the comparison function is not specified or if the |
|
26914593f079
Big performance improvement for fts-based tools that use FTS_NOSTAT.
Jim Meyering <jim@meyering.net>
parents:
7408
diff
changeset
|
470 FTS_DEFER_STAT option is in effect, don't stat any entry |
|
26914593f079
Big performance improvement for fts-based tools that use FTS_NOSTAT.
Jim Meyering <jim@meyering.net>
parents:
7408
diff
changeset
|
471 in this loop. This is an attempt to minimize the interval |
|
26914593f079
Big performance improvement for fts-based tools that use FTS_NOSTAT.
Jim Meyering <jim@meyering.net>
parents:
7408
diff
changeset
|
472 between the initial stat/lstat/fstatat and the point at which |
|
26914593f079
Big performance improvement for fts-based tools that use FTS_NOSTAT.
Jim Meyering <jim@meyering.net>
parents:
7408
diff
changeset
|
473 a directory argument is first opened. This matters for any |
|
26914593f079
Big performance improvement for fts-based tools that use FTS_NOSTAT.
Jim Meyering <jim@meyering.net>
parents:
7408
diff
changeset
|
474 directory command line argument that resides on a file system |
|
26914593f079
Big performance improvement for fts-based tools that use FTS_NOSTAT.
Jim Meyering <jim@meyering.net>
parents:
7408
diff
changeset
|
475 without genuine i-nodes. If you specify FTS_DEFER_STAT along |
|
26914593f079
Big performance improvement for fts-based tools that use FTS_NOSTAT.
Jim Meyering <jim@meyering.net>
parents:
7408
diff
changeset
|
476 with a comparison function, that function must not access any |
|
26914593f079
Big performance improvement for fts-based tools that use FTS_NOSTAT.
Jim Meyering <jim@meyering.net>
parents:
7408
diff
changeset
|
477 data via the fts_statp pointer. */ |
|
26914593f079
Big performance improvement for fts-based tools that use FTS_NOSTAT.
Jim Meyering <jim@meyering.net>
parents:
7408
diff
changeset
|
478 defer_stat = (compar == NULL || ISSET(FTS_DEFER_STAT)); |
|
26914593f079
Big performance improvement for fts-based tools that use FTS_NOSTAT.
Jim Meyering <jim@meyering.net>
parents:
7408
diff
changeset
|
479 |
| 5858 | 480 /* Allocate/initialize root(s). */ |
| 481 for (root = NULL, nitems = 0; *argv != NULL; ++argv, ++nitems) { | |
| 5907 | 482 /* Don't allow zero-length file names. */ |
| 5858 | 483 if ((len = strlen(*argv)) == 0) { |
| 484 __set_errno (ENOENT); | |
| 485 goto mem3; | |
| 486 } | |
| 487 | |
| 488 if ((p = fts_alloc(sp, *argv, len)) == NULL) | |
| 489 goto mem3; | |
| 490 p->fts_level = FTS_ROOTLEVEL; | |
| 491 p->fts_parent = parent; | |
| 492 p->fts_accpath = p->fts_name; | |
|
7499
67ce0bed0a20
Fix a bug in yesterday's change.
Jim Meyering <jim@meyering.net>
parents:
7483
diff
changeset
|
493 /* Even when defer_stat is true, be sure to stat the first |
|
67ce0bed0a20
Fix a bug in yesterday's change.
Jim Meyering <jim@meyering.net>
parents:
7483
diff
changeset
|
494 command line argument, since fts_read (at least with |
|
67ce0bed0a20
Fix a bug in yesterday's change.
Jim Meyering <jim@meyering.net>
parents:
7483
diff
changeset
|
495 FTS_XDEV) requires that. */ |
|
67ce0bed0a20
Fix a bug in yesterday's change.
Jim Meyering <jim@meyering.net>
parents:
7483
diff
changeset
|
496 if (defer_stat && root != NULL) { |
|
7482
26914593f079
Big performance improvement for fts-based tools that use FTS_NOSTAT.
Jim Meyering <jim@meyering.net>
parents:
7408
diff
changeset
|
497 p->fts_info = FTS_NSOK; |
|
26914593f079
Big performance improvement for fts-based tools that use FTS_NOSTAT.
Jim Meyering <jim@meyering.net>
parents:
7408
diff
changeset
|
498 fts_set_stat_required(p, true); |
|
26914593f079
Big performance improvement for fts-based tools that use FTS_NOSTAT.
Jim Meyering <jim@meyering.net>
parents:
7408
diff
changeset
|
499 } else { |
|
26914593f079
Big performance improvement for fts-based tools that use FTS_NOSTAT.
Jim Meyering <jim@meyering.net>
parents:
7408
diff
changeset
|
500 p->fts_info = fts_stat(sp, p, false); |
|
26914593f079
Big performance improvement for fts-based tools that use FTS_NOSTAT.
Jim Meyering <jim@meyering.net>
parents:
7408
diff
changeset
|
501 } |
| 5858 | 502 |
| 503 /* | |
| 504 * If comparison routine supplied, traverse in sorted | |
| 505 * order; otherwise traverse in the order specified. | |
| 506 */ | |
| 507 if (compar) { | |
| 508 p->fts_link = root; | |
| 509 root = p; | |
| 510 } else { | |
| 511 p->fts_link = NULL; | |
| 512 if (root == NULL) | |
| 513 tmp = root = p; | |
| 514 else { | |
| 515 tmp->fts_link = p; | |
| 516 tmp = p; | |
| 517 } | |
| 518 } | |
| 519 } | |
| 520 if (compar && nitems > 1) | |
| 521 root = fts_sort(sp, root, nitems); | |
| 522 | |
| 523 /* | |
| 524 * Allocate a dummy pointer and make fts_read think that we've just | |
| 525 * finished the node before the root(s); set p->fts_info to FTS_INIT | |
| 526 * so that everything about the "current" node is ignored. | |
| 527 */ | |
| 528 if ((sp->fts_cur = fts_alloc(sp, "", 0)) == NULL) | |
| 529 goto mem3; | |
| 530 sp->fts_cur->fts_link = root; | |
| 531 sp->fts_cur->fts_info = FTS_INIT; | |
| 5872 | 532 if (! setup_dir (sp)) |
|
7483
2433e5f6bfd0
* lib/fts.c (fts_open): Use consistent indentation.
Jim Meyering <jim@meyering.net>
parents:
7482
diff
changeset
|
533 goto mem3; |
| 5858 | 534 |
| 535 /* | |
| 536 * If using chdir(2), grab a file descriptor pointing to dot to ensure | |
| 5907 | 537 * that we can get back here; this could be avoided for some file names, |
| 5858 | 538 * but almost certainly not worth the effort. Slashes, symbolic links, |
| 539 * and ".." are all fairly nasty problems. Note, if we can't get the | |
| 540 * descriptor we run anyway, just more slowly. | |
| 541 */ | |
| 7151 | 542 if (!ISSET(FTS_NOCHDIR) && !ISSET(FTS_CWDFD) |
| 543 && (sp->fts_rfd = diropen (sp, ".")) < 0) | |
| 5858 | 544 SET(FTS_NOCHDIR); |
| 545 | |
|
7639
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
546 i_ring_init (&sp->fts_fd_ring, -1); |
| 5858 | 547 return (sp); |
| 548 | |
| 549 mem3: fts_lfree(root); | |
| 550 free(parent); | |
| 551 mem2: free(sp->fts_path); | |
| 552 mem1: free(sp); | |
| 553 return (NULL); | |
| 554 } | |
| 555 | |
| 556 static void | |
| 557 internal_function | |
| 558 fts_load (FTS *sp, register FTSENT *p) | |
| 559 { | |
| 560 register size_t len; | |
| 561 register char *cp; | |
| 562 | |
| 563 /* | |
| 564 * Load the stream structure for the next traversal. Since we don't | |
| 565 * actually enter the directory until after the preorder visit, set | |
| 566 * the fts_accpath field specially so the chdir gets done to the right | |
| 567 * place and the user can access the first node. From fts_open it's | |
| 5907 | 568 * known that the file name will fit. |
| 5858 | 569 */ |
| 570 len = p->fts_pathlen = p->fts_namelen; | |
| 571 memmove(sp->fts_path, p->fts_name, len + 1); | |
| 572 if ((cp = strrchr(p->fts_name, '/')) && (cp != p->fts_name || cp[1])) { | |
| 573 len = strlen(++cp); | |
| 574 memmove(p->fts_name, cp, len + 1); | |
| 575 p->fts_namelen = len; | |
| 576 } | |
| 577 p->fts_accpath = p->fts_path = sp->fts_path; | |
| 578 } | |
| 579 | |
| 580 int | |
| 581 fts_close (FTS *sp) | |
| 582 { | |
| 583 register FTSENT *freep, *p; | |
| 584 int saved_errno = 0; | |
| 585 | |
| 586 /* | |
| 587 * This still works if we haven't read anything -- the dummy structure | |
| 588 * points to the root list, so we step through to the end of the root | |
| 589 * list which has a valid parent pointer. | |
| 590 */ | |
| 591 if (sp->fts_cur) { | |
| 592 for (p = sp->fts_cur; p->fts_level >= FTS_ROOTLEVEL;) { | |
| 593 freep = p; | |
| 594 p = p->fts_link != NULL ? p->fts_link : p->fts_parent; | |
| 595 free(freep); | |
| 596 } | |
| 597 free(p); | |
| 598 } | |
| 599 | |
| 5907 | 600 /* Free up child linked list, sort array, file name buffer. */ |
| 5858 | 601 if (sp->fts_child) |
| 602 fts_lfree(sp->fts_child); | |
|
7396
6f79ccad009d
2006-10-02 Dmitry V. Levin <ldv@altlinux.org>
Jim Meyering <jim@meyering.net>
parents:
7302
diff
changeset
|
603 free(sp->fts_array); |
| 5858 | 604 free(sp->fts_path); |
| 605 | |
| 7151 | 606 if (ISSET(FTS_CWDFD)) |
| 607 { | |
| 608 if (0 <= sp->fts_cwd_fd) | |
| 609 close (sp->fts_cwd_fd); | |
| 610 } | |
| 611 else if (!ISSET(FTS_NOCHDIR)) | |
| 612 { | |
| 613 /* Return to original directory, save errno if necessary. */ | |
| 614 if (fchdir(sp->fts_rfd)) | |
| 615 saved_errno = errno; | |
| 616 close(sp->fts_rfd); | |
| 617 } | |
| 5858 | 618 |
|
7639
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
619 fd_ring_clear (&sp->fts_fd_ring); |
| 5872 | 620 free_dir (sp); |
| 5858 | 621 |
| 622 /* Free up the stream pointer. */ | |
| 623 free(sp); | |
| 624 | |
| 625 /* Set errno and return. */ | |
| 626 if (saved_errno) { | |
| 627 __set_errno (saved_errno); | |
| 628 return (-1); | |
| 629 } | |
| 630 | |
| 631 return (0); | |
| 632 } | |
| 633 | |
|
11163
f448fc8fe832
fts: move a function definition "up" (no semantic change)
Jim Meyering <meyering@redhat.com>
parents:
11162
diff
changeset
|
634 #if defined __linux__ \ |
|
f448fc8fe832
fts: move a function definition "up" (no semantic change)
Jim Meyering <meyering@redhat.com>
parents:
11162
diff
changeset
|
635 && HAVE_SYS_VFS_H && HAVE_FSTATFS && HAVE_STRUCT_STATFS_F_TYPE |
|
f448fc8fe832
fts: move a function definition "up" (no semantic change)
Jim Meyering <meyering@redhat.com>
parents:
11162
diff
changeset
|
636 |
|
f448fc8fe832
fts: move a function definition "up" (no semantic change)
Jim Meyering <meyering@redhat.com>
parents:
11162
diff
changeset
|
637 #include <sys/vfs.h> |
|
f448fc8fe832
fts: move a function definition "up" (no semantic change)
Jim Meyering <meyering@redhat.com>
parents:
11162
diff
changeset
|
638 |
|
f448fc8fe832
fts: move a function definition "up" (no semantic change)
Jim Meyering <meyering@redhat.com>
parents:
11162
diff
changeset
|
639 /* Linux-specific constants from coreutils' src/fs.h */ |
|
f448fc8fe832
fts: move a function definition "up" (no semantic change)
Jim Meyering <meyering@redhat.com>
parents:
11162
diff
changeset
|
640 # define S_MAGIC_TMPFS 0x1021994 |
|
f448fc8fe832
fts: move a function definition "up" (no semantic change)
Jim Meyering <meyering@redhat.com>
parents:
11162
diff
changeset
|
641 # define S_MAGIC_NFS 0x6969 |
|
f448fc8fe832
fts: move a function definition "up" (no semantic change)
Jim Meyering <meyering@redhat.com>
parents:
11162
diff
changeset
|
642 |
|
f448fc8fe832
fts: move a function definition "up" (no semantic change)
Jim Meyering <meyering@redhat.com>
parents:
11162
diff
changeset
|
643 /* Return false if it is easy to determine the file system type of |
|
f448fc8fe832
fts: move a function definition "up" (no semantic change)
Jim Meyering <meyering@redhat.com>
parents:
11162
diff
changeset
|
644 the directory on which DIR_FD is open, and sorting dirents on |
|
f448fc8fe832
fts: move a function definition "up" (no semantic change)
Jim Meyering <meyering@redhat.com>
parents:
11162
diff
changeset
|
645 inode numbers is known not to improve traversal performance with |
|
f448fc8fe832
fts: move a function definition "up" (no semantic change)
Jim Meyering <meyering@redhat.com>
parents:
11162
diff
changeset
|
646 that type of file system. Otherwise, return true. */ |
|
f448fc8fe832
fts: move a function definition "up" (no semantic change)
Jim Meyering <meyering@redhat.com>
parents:
11162
diff
changeset
|
647 static bool |
|
f448fc8fe832
fts: move a function definition "up" (no semantic change)
Jim Meyering <meyering@redhat.com>
parents:
11162
diff
changeset
|
648 dirent_inode_sort_may_be_useful (int dir_fd) |
|
f448fc8fe832
fts: move a function definition "up" (no semantic change)
Jim Meyering <meyering@redhat.com>
parents:
11162
diff
changeset
|
649 { |
|
f448fc8fe832
fts: move a function definition "up" (no semantic change)
Jim Meyering <meyering@redhat.com>
parents:
11162
diff
changeset
|
650 /* Skip the sort only if we can determine efficiently |
|
f448fc8fe832
fts: move a function definition "up" (no semantic change)
Jim Meyering <meyering@redhat.com>
parents:
11162
diff
changeset
|
651 that skipping it is the right thing to do. |
|
f448fc8fe832
fts: move a function definition "up" (no semantic change)
Jim Meyering <meyering@redhat.com>
parents:
11162
diff
changeset
|
652 The cost of performing an unnecessary sort is negligible, |
|
f448fc8fe832
fts: move a function definition "up" (no semantic change)
Jim Meyering <meyering@redhat.com>
parents:
11162
diff
changeset
|
653 while the cost of *not* performing it can be O(N^2) with |
|
f448fc8fe832
fts: move a function definition "up" (no semantic change)
Jim Meyering <meyering@redhat.com>
parents:
11162
diff
changeset
|
654 a very large constant. */ |
|
f448fc8fe832
fts: move a function definition "up" (no semantic change)
Jim Meyering <meyering@redhat.com>
parents:
11162
diff
changeset
|
655 struct statfs fs_buf; |
|
f448fc8fe832
fts: move a function definition "up" (no semantic change)
Jim Meyering <meyering@redhat.com>
parents:
11162
diff
changeset
|
656 |
|
f448fc8fe832
fts: move a function definition "up" (no semantic change)
Jim Meyering <meyering@redhat.com>
parents:
11162
diff
changeset
|
657 /* If fstatfs fails, assume sorting would be useful. */ |
|
f448fc8fe832
fts: move a function definition "up" (no semantic change)
Jim Meyering <meyering@redhat.com>
parents:
11162
diff
changeset
|
658 if (fstatfs (dir_fd, &fs_buf) != 0) |
|
f448fc8fe832
fts: move a function definition "up" (no semantic change)
Jim Meyering <meyering@redhat.com>
parents:
11162
diff
changeset
|
659 return true; |
|
f448fc8fe832
fts: move a function definition "up" (no semantic change)
Jim Meyering <meyering@redhat.com>
parents:
11162
diff
changeset
|
660 |
|
f448fc8fe832
fts: move a function definition "up" (no semantic change)
Jim Meyering <meyering@redhat.com>
parents:
11162
diff
changeset
|
661 /* FIXME: what about when f_type is not an integral type? |
|
f448fc8fe832
fts: move a function definition "up" (no semantic change)
Jim Meyering <meyering@redhat.com>
parents:
11162
diff
changeset
|
662 deal with that if/when it's encountered. */ |
|
f448fc8fe832
fts: move a function definition "up" (no semantic change)
Jim Meyering <meyering@redhat.com>
parents:
11162
diff
changeset
|
663 switch (fs_buf.f_type) |
|
f448fc8fe832
fts: move a function definition "up" (no semantic change)
Jim Meyering <meyering@redhat.com>
parents:
11162
diff
changeset
|
664 { |
|
f448fc8fe832
fts: move a function definition "up" (no semantic change)
Jim Meyering <meyering@redhat.com>
parents:
11162
diff
changeset
|
665 case S_MAGIC_TMPFS: |
|
f448fc8fe832
fts: move a function definition "up" (no semantic change)
Jim Meyering <meyering@redhat.com>
parents:
11162
diff
changeset
|
666 case S_MAGIC_NFS: |
|
f448fc8fe832
fts: move a function definition "up" (no semantic change)
Jim Meyering <meyering@redhat.com>
parents:
11162
diff
changeset
|
667 /* On a file system of any of these types, sorting |
|
f448fc8fe832
fts: move a function definition "up" (no semantic change)
Jim Meyering <meyering@redhat.com>
parents:
11162
diff
changeset
|
668 is unnecessary, and hence wasteful. */ |
|
f448fc8fe832
fts: move a function definition "up" (no semantic change)
Jim Meyering <meyering@redhat.com>
parents:
11162
diff
changeset
|
669 return false; |
|
f448fc8fe832
fts: move a function definition "up" (no semantic change)
Jim Meyering <meyering@redhat.com>
parents:
11162
diff
changeset
|
670 |
|
f448fc8fe832
fts: move a function definition "up" (no semantic change)
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parents:
11162
diff
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|
671 default: |
|
f448fc8fe832
fts: move a function definition "up" (no semantic change)
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parents:
11162
diff
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|
672 return true; |
|
f448fc8fe832
fts: move a function definition "up" (no semantic change)
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parents:
11162
diff
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|
673 } |
|
f448fc8fe832
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diff
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|
674 } |
|
f448fc8fe832
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|
675 #else |
|
f448fc8fe832
fts: move a function definition "up" (no semantic change)
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parents:
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|
676 static bool dirent_inode_sort_may_be_useful (int dir_fd) { return true; } |
|
f448fc8fe832
fts: move a function definition "up" (no semantic change)
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parents:
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diff
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|
677 #endif |
|
f448fc8fe832
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parents:
11162
diff
changeset
|
678 |
| 5858 | 679 /* |
| 5907 | 680 * Special case of "/" at the end of the file name so that slashes aren't |
| 681 * appended which would cause file names to be written as "....//foo". | |
| 5858 | 682 */ |
| 683 #define NAPPEND(p) \ | |
| 684 (p->fts_path[p->fts_pathlen - 1] == '/' \ | |
| 685 ? p->fts_pathlen - 1 : p->fts_pathlen) | |
| 686 | |
| 687 FTSENT * | |
| 688 fts_read (register FTS *sp) | |
| 689 { | |
| 690 register FTSENT *p, *tmp; | |
| 691 register unsigned short int instr; | |
| 692 register char *t; | |
| 693 | |
| 694 /* If finished or unrecoverable error, return NULL. */ | |
| 695 if (sp->fts_cur == NULL || ISSET(FTS_STOP)) | |
| 696 return (NULL); | |
| 697 | |
| 698 /* Set current node pointer. */ | |
| 699 p = sp->fts_cur; | |
| 700 | |
| 701 /* Save and zero out user instructions. */ | |
| 702 instr = p->fts_instr; | |
| 703 p->fts_instr = FTS_NOINSTR; | |
| 704 | |
| 705 /* Any type of file may be re-visited; re-stat and re-turn. */ | |
| 706 if (instr == FTS_AGAIN) { | |
| 707 p->fts_info = fts_stat(sp, p, false); | |
| 708 return (p); | |
| 709 } | |
| 710 Dprintf (("fts_read: p=%s\n", | |
| 711 p->fts_info == FTS_INIT ? "" : p->fts_path)); | |
| 712 | |
| 713 /* | |
| 714 * Following a symlink -- SLNONE test allows application to see | |
| 715 * SLNONE and recover. If indirecting through a symlink, have | |
| 716 * keep a pointer to current location. If unable to get that | |
| 717 * pointer, follow fails. | |
| 718 */ | |
| 719 if (instr == FTS_FOLLOW && | |
| 720 (p->fts_info == FTS_SL || p->fts_info == FTS_SLNONE)) { | |
| 721 p->fts_info = fts_stat(sp, p, true); | |
| 722 if (p->fts_info == FTS_D && !ISSET(FTS_NOCHDIR)) { | |
| 7151 | 723 if ((p->fts_symfd = diropen (sp, ".")) < 0) { |
| 5858 | 724 p->fts_errno = errno; |
| 725 p->fts_info = FTS_ERR; | |
| 726 } else | |
| 727 p->fts_flags |= FTS_SYMFOLLOW; | |
| 728 } | |
| 5872 | 729 goto check_for_dir; |
| 5858 | 730 } |
| 731 | |
| 732 /* Directory in pre-order. */ | |
| 733 if (p->fts_info == FTS_D) { | |
| 734 /* If skipped or crossed mount point, do post-order visit. */ | |
| 735 if (instr == FTS_SKIP || | |
| 736 (ISSET(FTS_XDEV) && p->fts_statp->st_dev != sp->fts_dev)) { | |
| 737 if (p->fts_flags & FTS_SYMFOLLOW) | |
| 738 (void)close(p->fts_symfd); | |
| 739 if (sp->fts_child) { | |
| 740 fts_lfree(sp->fts_child); | |
| 741 sp->fts_child = NULL; | |
| 742 } | |
| 743 p->fts_info = FTS_DP; | |
| 744 LEAVE_DIR (sp, p, "1"); | |
| 745 return (p); | |
| 746 } | |
| 747 | |
| 748 /* Rebuild if only read the names and now traversing. */ | |
| 749 if (sp->fts_child != NULL && ISSET(FTS_NAMEONLY)) { | |
| 750 CLR(FTS_NAMEONLY); | |
| 751 fts_lfree(sp->fts_child); | |
| 752 sp->fts_child = NULL; | |
| 753 } | |
| 754 | |
| 755 /* | |
| 756 * Cd to the subdirectory. | |
| 757 * | |
| 758 * If have already read and now fail to chdir, whack the list | |
| 759 * to make the names come out right, and set the parent errno | |
| 760 * so the application will eventually get an error condition. | |
| 761 * Set the FTS_DONTCHDIR flag so that when we logically change | |
| 762 * directories back to the parent we don't do a chdir. | |
| 763 * | |
| 764 * If haven't read do so. If the read fails, fts_build sets | |
| 765 * FTS_STOP or the fts_info field of the node. | |
| 766 */ | |
| 767 if (sp->fts_child != NULL) { | |
| 768 if (fts_safe_changedir(sp, p, -1, p->fts_accpath)) { | |
| 769 p->fts_errno = errno; | |
| 770 p->fts_flags |= FTS_DONTCHDIR; | |
| 771 for (p = sp->fts_child; p != NULL; | |
| 772 p = p->fts_link) | |
| 773 p->fts_accpath = | |
| 774 p->fts_parent->fts_accpath; | |
| 775 } | |
| 776 } else if ((sp->fts_child = fts_build(sp, BREAD)) == NULL) { | |
| 777 if (ISSET(FTS_STOP)) | |
| 778 return (NULL); | |
| 779 /* If fts_build's call to fts_safe_changedir failed | |
| 780 because it was not able to fchdir into a | |
| 781 subdirectory, tell the caller. */ | |
|
9129
79b0e6e0f7ba
* lib/fts.c (fts_read): Upon failure to chdir into a subdirectory,
Jim Meyering <jim@meyering.net>
parents:
7853
diff
changeset
|
782 if (p->fts_errno && p->fts_info != FTS_DNR) |
| 5858 | 783 p->fts_info = FTS_ERR; |
| 784 LEAVE_DIR (sp, p, "2"); | |
| 785 return (p); | |
| 786 } | |
| 787 p = sp->fts_child; | |
| 788 sp->fts_child = NULL; | |
| 789 goto name; | |
| 790 } | |
| 791 | |
| 792 /* Move to the next node on this level. */ | |
| 793 next: tmp = p; | |
| 794 if ((p = p->fts_link) != NULL) { | |
|
7853
9ddbddb3fc43
fts.c: a small readability/maintainability improvement
Jim Meyering <jim@meyering.net>
parents:
7797
diff
changeset
|
795 sp->fts_cur = p; |
| 5858 | 796 free(tmp); |
| 797 | |
| 798 /* | |
| 799 * If reached the top, return to the original directory (or | |
| 5907 | 800 * the root of the tree), and load the file names for the next |
| 801 * root. | |
| 5858 | 802 */ |
| 803 if (p->fts_level == FTS_ROOTLEVEL) { | |
| 7151 | 804 if (RESTORE_INITIAL_CWD(sp)) { |
| 5858 | 805 SET(FTS_STOP); |
| 806 return (NULL); | |
| 807 } | |
| 808 fts_load(sp, p); | |
| 5872 | 809 goto check_for_dir; |
| 5858 | 810 } |
| 811 | |
| 812 /* | |
| 813 * User may have called fts_set on the node. If skipped, | |
| 814 * ignore. If followed, get a file descriptor so we can | |
| 815 * get back if necessary. | |
| 816 */ | |
| 817 if (p->fts_instr == FTS_SKIP) | |
| 818 goto next; | |
| 819 if (p->fts_instr == FTS_FOLLOW) { | |
| 820 p->fts_info = fts_stat(sp, p, true); | |
| 821 if (p->fts_info == FTS_D && !ISSET(FTS_NOCHDIR)) { | |
| 7151 | 822 if ((p->fts_symfd = diropen (sp, ".")) < 0) { |
| 5858 | 823 p->fts_errno = errno; |
| 824 p->fts_info = FTS_ERR; | |
| 825 } else | |
| 826 p->fts_flags |= FTS_SYMFOLLOW; | |
| 827 } | |
| 828 p->fts_instr = FTS_NOINSTR; | |
| 829 } | |
| 830 | |
| 831 name: t = sp->fts_path + NAPPEND(p->fts_parent); | |
| 832 *t++ = '/'; | |
| 833 memmove(t, p->fts_name, p->fts_namelen + 1); | |
| 5872 | 834 check_for_dir: |
|
7853
9ddbddb3fc43
fts.c: a small readability/maintainability improvement
Jim Meyering <jim@meyering.net>
parents:
7797
diff
changeset
|
835 sp->fts_cur = p; |
|
7482
26914593f079
Big performance improvement for fts-based tools that use FTS_NOSTAT.
Jim Meyering <jim@meyering.net>
parents:
7408
diff
changeset
|
836 if (p->fts_info == FTS_NSOK) |
|
26914593f079
Big performance improvement for fts-based tools that use FTS_NOSTAT.
Jim Meyering <jim@meyering.net>
parents:
7408
diff
changeset
|
837 { |
|
7786
f79f76e0b6f7
Use a more robust test for a "can't happen" condition.
Jim Meyering <jim@meyering.net>
parents:
7785
diff
changeset
|
838 if (p->fts_statp->st_size == FTS_STAT_REQUIRED) |
|
f79f76e0b6f7
Use a more robust test for a "can't happen" condition.
Jim Meyering <jim@meyering.net>
parents:
7785
diff
changeset
|
839 p->fts_info = fts_stat(sp, p, false); |
|
f79f76e0b6f7
Use a more robust test for a "can't happen" condition.
Jim Meyering <jim@meyering.net>
parents:
7785
diff
changeset
|
840 else |
|
f79f76e0b6f7
Use a more robust test for a "can't happen" condition.
Jim Meyering <jim@meyering.net>
parents:
7785
diff
changeset
|
841 fts_assert (p->fts_statp->st_size == FTS_NO_STAT_REQUIRED); |
|
7482
26914593f079
Big performance improvement for fts-based tools that use FTS_NOSTAT.
Jim Meyering <jim@meyering.net>
parents:
7408
diff
changeset
|
842 } |
|
7707
3f57a32346a2
* lib/fts.c (fts_load): Don't set sp->fts_dev here, since
Jim Meyering <jim@meyering.net>
parents:
7684
diff
changeset
|
843 |
| 5858 | 844 if (p->fts_info == FTS_D) |
| 5872 | 845 { |
|
7707
3f57a32346a2
* lib/fts.c (fts_load): Don't set sp->fts_dev here, since
Jim Meyering <jim@meyering.net>
parents:
7684
diff
changeset
|
846 /* Now that P->fts_statp is guaranteed to be valid, |
|
3f57a32346a2
* lib/fts.c (fts_load): Don't set sp->fts_dev here, since
Jim Meyering <jim@meyering.net>
parents:
7684
diff
changeset
|
847 if this is a command-line directory, record its |
|
3f57a32346a2
* lib/fts.c (fts_load): Don't set sp->fts_dev here, since
Jim Meyering <jim@meyering.net>
parents:
7684
diff
changeset
|
848 device number, to be used for FTS_XDEV. */ |
|
3f57a32346a2
* lib/fts.c (fts_load): Don't set sp->fts_dev here, since
Jim Meyering <jim@meyering.net>
parents:
7684
diff
changeset
|
849 if (p->fts_level == FTS_ROOTLEVEL) |
|
3f57a32346a2
* lib/fts.c (fts_load): Don't set sp->fts_dev here, since
Jim Meyering <jim@meyering.net>
parents:
7684
diff
changeset
|
850 sp->fts_dev = p->fts_statp->st_dev; |
|
7635
7f65b3a0e7a4
* lib/fts.c [FTS_DEBUG]: Don't try to print a pointer via %s.
Jim Meyering <jim@meyering.net>
parents:
7623
diff
changeset
|
851 Dprintf ((" entering: %s\n", p->fts_path)); |
| 5872 | 852 if (! enter_dir (sp, p)) |
| 853 { | |
| 854 __set_errno (ENOMEM); | |
| 855 return NULL; | |
| 856 } | |
| 857 } | |
| 858 return p; | |
| 5858 | 859 } |
| 860 | |
| 861 /* Move up to the parent node. */ | |
| 862 p = tmp->fts_parent; | |
|
7853
9ddbddb3fc43
fts.c: a small readability/maintainability improvement
Jim Meyering <jim@meyering.net>
parents:
7797
diff
changeset
|
863 sp->fts_cur = p; |
| 5858 | 864 free(tmp); |
| 865 | |
| 866 if (p->fts_level == FTS_ROOTPARENTLEVEL) { | |
| 867 /* | |
| 868 * Done; free everything up and set errno to 0 so the user | |
| 869 * can distinguish between error and EOF. | |
| 870 */ | |
| 871 free(p); | |
| 872 __set_errno (0); | |
| 873 return (sp->fts_cur = NULL); | |
| 874 } | |
| 875 | |
|
7785
3246679850d5
Slight readability improvement: use an assert-like macro
Jim Meyering <jim@meyering.net>
parents:
7707
diff
changeset
|
876 fts_assert (p->fts_info != FTS_NSOK); |
|
7482
26914593f079
Big performance improvement for fts-based tools that use FTS_NOSTAT.
Jim Meyering <jim@meyering.net>
parents:
7408
diff
changeset
|
877 |
| 5907 | 878 /* NUL terminate the file name. */ |
| 5858 | 879 sp->fts_path[p->fts_pathlen] = '\0'; |
| 880 | |
| 881 /* | |
| 7151 | 882 * Return to the parent directory. If at a root node, restore |
| 883 * the initial working directory. If we came through a symlink, | |
| 884 * go back through the file descriptor. Otherwise, move up | |
| 885 * one level, via "..". | |
| 5858 | 886 */ |
| 887 if (p->fts_level == FTS_ROOTLEVEL) { | |
| 7151 | 888 if (RESTORE_INITIAL_CWD(sp)) { |
| 5858 | 889 p->fts_errno = errno; |
| 890 SET(FTS_STOP); | |
| 891 } | |
| 892 } else if (p->fts_flags & FTS_SYMFOLLOW) { | |
| 893 if (FCHDIR(sp, p->fts_symfd)) { | |
| 7151 | 894 int saved_errno = errno; |
| 5858 | 895 (void)close(p->fts_symfd); |
| 896 __set_errno (saved_errno); | |
| 897 p->fts_errno = errno; | |
| 898 SET(FTS_STOP); | |
| 899 } | |
| 900 (void)close(p->fts_symfd); | |
| 901 } else if (!(p->fts_flags & FTS_DONTCHDIR) && | |
| 902 fts_safe_changedir(sp, p->fts_parent, -1, "..")) { | |
| 903 p->fts_errno = errno; | |
| 904 SET(FTS_STOP); | |
| 905 } | |
| 906 p->fts_info = p->fts_errno ? FTS_ERR : FTS_DP; | |
| 907 if (p->fts_errno == 0) | |
| 908 LEAVE_DIR (sp, p, "3"); | |
| 909 return ISSET(FTS_STOP) ? NULL : p; | |
| 910 } | |
| 911 | |
| 912 /* | |
| 913 * Fts_set takes the stream as an argument although it's not used in this | |
| 914 * implementation; it would be necessary if anyone wanted to add global | |
| 915 * semantics to fts using fts_set. An error return is allowed for similar | |
| 916 * reasons. | |
| 917 */ | |
| 918 /* ARGSUSED */ | |
| 919 int | |
| 920 fts_set(FTS *sp ATTRIBUTE_UNUSED, FTSENT *p, int instr) | |
| 921 { | |
| 922 if (instr != 0 && instr != FTS_AGAIN && instr != FTS_FOLLOW && | |
| 923 instr != FTS_NOINSTR && instr != FTS_SKIP) { | |
| 924 __set_errno (EINVAL); | |
| 925 return (1); | |
| 926 } | |
| 927 p->fts_instr = instr; | |
| 928 return (0); | |
| 929 } | |
| 930 | |
| 931 FTSENT * | |
| 932 fts_children (register FTS *sp, int instr) | |
| 933 { | |
| 934 register FTSENT *p; | |
| 935 int fd; | |
| 936 | |
| 937 if (instr != 0 && instr != FTS_NAMEONLY) { | |
| 938 __set_errno (EINVAL); | |
| 939 return (NULL); | |
| 940 } | |
| 941 | |
| 942 /* Set current node pointer. */ | |
| 943 p = sp->fts_cur; | |
| 944 | |
| 945 /* | |
| 946 * Errno set to 0 so user can distinguish empty directory from | |
| 947 * an error. | |
| 948 */ | |
| 949 __set_errno (0); | |
| 950 | |
| 951 /* Fatal errors stop here. */ | |
| 952 if (ISSET(FTS_STOP)) | |
| 953 return (NULL); | |
| 954 | |
| 955 /* Return logical hierarchy of user's arguments. */ | |
| 956 if (p->fts_info == FTS_INIT) | |
| 957 return (p->fts_link); | |
| 958 | |
| 959 /* | |
| 960 * If not a directory being visited in pre-order, stop here. Could | |
| 961 * allow FTS_DNR, assuming the user has fixed the problem, but the | |
| 962 * same effect is available with FTS_AGAIN. | |
| 963 */ | |
| 964 if (p->fts_info != FTS_D /* && p->fts_info != FTS_DNR */) | |
| 965 return (NULL); | |
| 966 | |
| 967 /* Free up any previous child list. */ | |
| 968 if (sp->fts_child != NULL) | |
| 969 fts_lfree(sp->fts_child); | |
| 970 | |
| 971 if (instr == FTS_NAMEONLY) { | |
| 972 SET(FTS_NAMEONLY); | |
| 973 instr = BNAMES; | |
| 974 } else | |
| 975 instr = BCHILD; | |
| 976 | |
| 977 /* | |
| 5907 | 978 * If using chdir on a relative file name and called BEFORE fts_read |
| 979 * does its chdir to the root of a traversal, we can lose -- we need to | |
| 5858 | 980 * chdir into the subdirectory, and we don't know where the current |
| 981 * directory is, so we can't get back so that the upcoming chdir by | |
| 982 * fts_read will work. | |
| 983 */ | |
| 984 if (p->fts_level != FTS_ROOTLEVEL || p->fts_accpath[0] == '/' || | |
| 985 ISSET(FTS_NOCHDIR)) | |
| 986 return (sp->fts_child = fts_build(sp, instr)); | |
| 987 | |
| 7151 | 988 if ((fd = diropen (sp, ".")) < 0) |
| 5858 | 989 return (sp->fts_child = NULL); |
| 990 sp->fts_child = fts_build(sp, instr); | |
| 7151 | 991 if (ISSET(FTS_CWDFD)) |
| 992 { | |
|
7639
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
993 cwd_advance_fd (sp, fd, true); |
| 7151 | 994 } |
| 995 else | |
| 996 { | |
| 997 if (fchdir(fd)) | |
| 998 { | |
|
6611
e4456c51dde7
Sync from the stable (b5) branch of coreutils:
Jim Meyering <jim@meyering.net>
parents:
6540
diff
changeset
|
999 int saved_errno = errno; |
| 7151 | 1000 close (fd); |
|
6611
e4456c51dde7
Sync from the stable (b5) branch of coreutils:
Jim Meyering <jim@meyering.net>
parents:
6540
diff
changeset
|
1001 __set_errno (saved_errno); |
| 7151 | 1002 return NULL; |
| 1003 } | |
| 1004 close (fd); | |
| 1005 } | |
| 5858 | 1006 return (sp->fts_child); |
| 1007 } | |
| 1008 | |
|
10481
47fe4e48e158
fts: sort dirent entries on inode number before traversing
Jim Meyering <meyering@redhat.com>
parents:
9718
diff
changeset
|
1009 /* A comparison function to sort on increasing inode number. |
|
47fe4e48e158
fts: sort dirent entries on inode number before traversing
Jim Meyering <meyering@redhat.com>
parents:
9718
diff
changeset
|
1010 For some file system types, sorting either way makes a huge |
|
47fe4e48e158
fts: sort dirent entries on inode number before traversing
Jim Meyering <meyering@redhat.com>
parents:
9718
diff
changeset
|
1011 performance difference for a directory with very many entries, |
|
47fe4e48e158
fts: sort dirent entries on inode number before traversing
Jim Meyering <meyering@redhat.com>
parents:
9718
diff
changeset
|
1012 but sorting on increasing values is slightly better than sorting |
|
47fe4e48e158
fts: sort dirent entries on inode number before traversing
Jim Meyering <meyering@redhat.com>
parents:
9718
diff
changeset
|
1013 on decreasing values. The difference is in the 5% range. */ |
|
47fe4e48e158
fts: sort dirent entries on inode number before traversing
Jim Meyering <meyering@redhat.com>
parents:
9718
diff
changeset
|
1014 static int |
|
47fe4e48e158
fts: sort dirent entries on inode number before traversing
Jim Meyering <meyering@redhat.com>
parents:
9718
diff
changeset
|
1015 fts_compare_ino (struct _ftsent const **a, struct _ftsent const **b) |
|
47fe4e48e158
fts: sort dirent entries on inode number before traversing
Jim Meyering <meyering@redhat.com>
parents:
9718
diff
changeset
|
1016 { |
|
10482
e8d1a5b2c49c
fts: tweak inode comparison function
Jim Meyering <meyering@redhat.com>
parents:
10481
diff
changeset
|
1017 return (a[0]->fts_statp->st_ino < b[0]->fts_statp->st_ino ? -1 |
|
e8d1a5b2c49c
fts: tweak inode comparison function
Jim Meyering <meyering@redhat.com>
parents:
10481
diff
changeset
|
1018 : b[0]->fts_statp->st_ino < a[0]->fts_statp->st_ino ? 1 : 0); |
|
10481
47fe4e48e158
fts: sort dirent entries on inode number before traversing
Jim Meyering <meyering@redhat.com>
parents:
9718
diff
changeset
|
1019 } |
|
47fe4e48e158
fts: sort dirent entries on inode number before traversing
Jim Meyering <meyering@redhat.com>
parents:
9718
diff
changeset
|
1020 |
|
10843
36479bd141ee
fts: provide dirent.d_type via FTSENT.fts_statp, when possible
Jim Meyering <meyering@redhat.com>
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1021 /* Map the dirent.d_type value, DTYPE, to the corresponding stat.st_mode |
|
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1022 S_IF* bit and set ST.st_mode, thus clearing all other bits in that field. */ |
|
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1023 static void |
|
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1024 set_stat_type (struct stat *st, unsigned int dtype) |
|
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1025 { |
|
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1026 mode_t type; |
|
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1027 switch (dtype) |
|
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1028 { |
|
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1029 case DT_BLK: |
|
36479bd141ee
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1030 type = S_IFBLK; |
|
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1031 break; |
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1032 case DT_CHR: |
|
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1033 type = S_IFCHR; |
|
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1034 break; |
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1035 case DT_DIR: |
|
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1036 type = S_IFDIR; |
|
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1037 break; |
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1038 case DT_FIFO: |
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1039 type = S_IFIFO; |
|
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1040 break; |
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1041 case DT_LNK: |
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1042 type = S_IFLNK; |
|
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1043 break; |
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1044 case DT_REG: |
|
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1045 type = S_IFREG; |
|
36479bd141ee
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1046 break; |
|
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1047 case DT_SOCK: |
|
36479bd141ee
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1048 type = S_IFSOCK; |
|
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1049 break; |
|
36479bd141ee
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1050 default: |
|
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1051 type = 0; |
|
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Jim Meyering <meyering@redhat.com>
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|
1052 } |
| 10844 | 1053 st->st_mode = type; |
|
10843
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|
1054 } |
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|
1055 |
| 5858 | 1056 /* |
| 1057 * This is the tricky part -- do not casually change *anything* in here. The | |
| 1058 * idea is to build the linked list of entries that are used by fts_children | |
| 1059 * and fts_read. There are lots of special cases. | |
| 1060 * | |
| 1061 * The real slowdown in walking the tree is the stat calls. If FTS_NOSTAT is | |
| 1062 * set and it's a physical walk (so that symbolic links can't be directories), | |
| 1063 * we can do things quickly. First, if it's a 4.4BSD file system, the type | |
| 1064 * of the file is in the directory entry. Otherwise, we assume that the number | |
| 1065 * of subdirectories in a node is equal to the number of links to the parent. | |
| 1066 * The former skips all stat calls. The latter skips stat calls in any leaf | |
| 1067 * directories and for any files after the subdirectories in the directory have | |
| 1068 * been found, cutting the stat calls by about 2/3. | |
| 1069 */ | |
| 1070 static FTSENT * | |
| 1071 internal_function | |
| 1072 fts_build (register FTS *sp, int type) | |
| 1073 { | |
| 1074 register struct dirent *dp; | |
| 1075 register FTSENT *p, *head; | |
| 1076 register size_t nitems; | |
| 1077 FTSENT *cur, *tail; | |
| 1078 DIR *dirp; | |
| 1079 void *oldaddr; | |
| 1080 int saved_errno; | |
| 1081 bool descend; | |
| 1082 bool doadjust; | |
| 1083 ptrdiff_t level; | |
| 1084 nlink_t nlinks; | |
| 1085 bool nostat; | |
| 1086 size_t len, maxlen, new_len; | |
| 1087 char *cp; | |
| 1088 | |
| 1089 /* Set current node pointer. */ | |
| 1090 cur = sp->fts_cur; | |
| 1091 | |
| 1092 /* | |
| 1093 * Open the directory for reading. If this fails, we're done. | |
| 1094 * If being called from fts_read, set the fts_info field. | |
| 1095 */ | |
| 1096 #if defined FTS_WHITEOUT && 0 | |
| 1097 if (ISSET(FTS_WHITEOUT)) | |
| 1098 oflag = DTF_NODUP|DTF_REWIND; | |
| 1099 else | |
| 1100 oflag = DTF_HIDEW|DTF_NODUP|DTF_REWIND; | |
| 1101 #else | |
| 7151 | 1102 # define __opendir2(file, flag) \ |
| 1103 ( ! ISSET(FTS_NOCHDIR) && ISSET(FTS_CWDFD) \ | |
| 1104 ? opendirat(sp->fts_cwd_fd, file) \ | |
| 1105 : opendir(file)) | |
| 5858 | 1106 #endif |
| 1107 if ((dirp = __opendir2(cur->fts_accpath, oflag)) == NULL) { | |
| 1108 if (type == BREAD) { | |
| 1109 cur->fts_info = FTS_DNR; | |
| 1110 cur->fts_errno = errno; | |
| 1111 } | |
| 1112 return (NULL); | |
| 1113 } | |
|
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1114 /* Rather than calling fts_stat for each and every entry encountered |
|
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diff
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|
1115 in the readdir loop (below), stat each directory only right after |
|
26914593f079
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|
1116 opening it. */ |
|
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|
1117 if (cur->fts_info == FTS_NSOK) |
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|
1118 cur->fts_info = fts_stat(sp, cur, false); |
| 5858 | 1119 |
| 1120 /* | |
| 1121 * Nlinks is the number of possible entries of type directory in the | |
| 1122 * directory if we're cheating on stat calls, 0 if we're not doing | |
| 1123 * any stat calls at all, (nlink_t) -1 if we're statting everything. | |
| 1124 */ | |
| 1125 if (type == BNAMES) { | |
| 1126 nlinks = 0; | |
| 1127 /* Be quiet about nostat, GCC. */ | |
| 1128 nostat = false; | |
| 1129 } else if (ISSET(FTS_NOSTAT) && ISSET(FTS_PHYSICAL)) { | |
| 1130 nlinks = (cur->fts_statp->st_nlink | |
| 1131 - (ISSET(FTS_SEEDOT) ? 0 : 2)); | |
| 1132 nostat = true; | |
| 1133 } else { | |
| 1134 nlinks = -1; | |
| 1135 nostat = false; | |
| 1136 } | |
| 1137 | |
| 1138 /* | |
| 1139 * If we're going to need to stat anything or we want to descend | |
| 1140 * and stay in the directory, chdir. If this fails we keep going, | |
| 1141 * but set a flag so we don't chdir after the post-order visit. | |
| 1142 * We won't be able to stat anything, but we can still return the | |
| 1143 * names themselves. Note, that since fts_read won't be able to | |
| 5907 | 1144 * chdir into the directory, it will have to return different file |
| 5858 | 1145 * names than before, i.e. "a/b" instead of "b". Since the node |
| 1146 * has already been visited in pre-order, have to wait until the | |
| 1147 * post-order visit to return the error. There is a special case | |
| 1148 * here, if there was nothing to stat then it's not an error to | |
| 1149 * not be able to stat. This is all fairly nasty. If a program | |
| 1150 * needed sorted entries or stat information, they had better be | |
| 1151 * checking FTS_NS on the returned nodes. | |
| 1152 */ | |
| 1153 if (nlinks || type == BREAD) { | |
| 7151 | 1154 int dir_fd = dirfd(dirp); |
| 1155 if (ISSET(FTS_CWDFD) && 0 <= dir_fd) | |
| 1156 dir_fd = dup (dir_fd); | |
| 1157 if (dir_fd < 0 || fts_safe_changedir(sp, cur, dir_fd, NULL)) { | |
| 5858 | 1158 if (nlinks && type == BREAD) |
| 1159 cur->fts_errno = errno; | |
| 1160 cur->fts_flags |= FTS_DONTCHDIR; | |
| 1161 descend = false; | |
|
5867
67b499052f7f
* fts.c: Include fts_.h first, to check interface.
Paul Eggert <eggert@cs.ucla.edu>
parents:
5858
diff
changeset
|
1162 closedir(dirp); |
| 7151 | 1163 if (ISSET(FTS_CWDFD) && 0 <= dir_fd) |
| 1164 close (dir_fd); | |
| 5858 | 1165 dirp = NULL; |
| 1166 } else | |
| 1167 descend = true; | |
| 1168 } else | |
| 1169 descend = false; | |
| 1170 | |
| 1171 /* | |
| 1172 * Figure out the max file name length that can be stored in the | |
| 5907 | 1173 * current buffer -- the inner loop allocates more space as necessary. |
| 5858 | 1174 * We really wouldn't have to do the maxlen calculations here, we |
| 5907 | 1175 * could do them in fts_read before returning the name, but it's a |
| 5858 | 1176 * lot easier here since the length is part of the dirent structure. |
| 1177 * | |
| 1178 * If not changing directories set a pointer so that can just append | |
| 5907 | 1179 * each new component into the file name. |
| 5858 | 1180 */ |
| 1181 len = NAPPEND(cur); | |
| 1182 if (ISSET(FTS_NOCHDIR)) { | |
| 1183 cp = sp->fts_path + len; | |
| 1184 *cp++ = '/'; | |
| 1185 } else { | |
| 1186 /* GCC, you're too verbose. */ | |
| 1187 cp = NULL; | |
| 1188 } | |
| 1189 len++; | |
| 1190 maxlen = sp->fts_pathlen - len; | |
| 1191 | |
| 1192 level = cur->fts_level + 1; | |
| 1193 | |
| 1194 /* Read the directory, attaching each entry to the `link' pointer. */ | |
| 1195 doadjust = false; | |
| 1196 for (head = tail = NULL, nitems = 0; dirp && (dp = readdir(dirp));) { | |
|
7555
0da62e3fa6c7
(fts_build): Move variable declaration, for C89 compliance.
Bruno Haible <bruno@clisp.org>
parents:
7499
diff
changeset
|
1197 bool is_dir; |
|
0da62e3fa6c7
(fts_build): Move variable declaration, for C89 compliance.
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diff
changeset
|
1198 |
| 5858 | 1199 if (!ISSET(FTS_SEEDOT) && ISDOT(dp->d_name)) |
| 1200 continue; | |
| 1201 | |
|
6949
96af1224c6fa
* backupfile.c, dirfd.h, fts.c, getcwd.c, glob.c, glob_.h:
Paul Eggert <eggert@cs.ucla.edu>
parents:
6934
diff
changeset
|
1202 if ((p = fts_alloc (sp, dp->d_name, |
|
96af1224c6fa
* backupfile.c, dirfd.h, fts.c, getcwd.c, glob.c, glob_.h:
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diff
changeset
|
1203 _D_EXACT_NAMLEN (dp))) == NULL) |
| 5858 | 1204 goto mem1; |
|
6949
96af1224c6fa
* backupfile.c, dirfd.h, fts.c, getcwd.c, glob.c, glob_.h:
Paul Eggert <eggert@cs.ucla.edu>
parents:
6934
diff
changeset
|
1205 if (_D_EXACT_NAMLEN (dp) >= maxlen) { |
|
96af1224c6fa
* backupfile.c, dirfd.h, fts.c, getcwd.c, glob.c, glob_.h:
Paul Eggert <eggert@cs.ucla.edu>
parents:
6934
diff
changeset
|
1206 /* include space for NUL */ |
| 5858 | 1207 oldaddr = sp->fts_path; |
|
6949
96af1224c6fa
* backupfile.c, dirfd.h, fts.c, getcwd.c, glob.c, glob_.h:
Paul Eggert <eggert@cs.ucla.edu>
parents:
6934
diff
changeset
|
1208 if (! fts_palloc(sp, _D_EXACT_NAMLEN (dp) + len + 1)) { |
| 5858 | 1209 /* |
| 5907 | 1210 * No more memory. Save |
| 5858 | 1211 * errno, free up the current structure and the |
| 1212 * structures already allocated. | |
| 1213 */ | |
| 1214 mem1: saved_errno = errno; | |
|
7396
6f79ccad009d
2006-10-02 Dmitry V. Levin <ldv@altlinux.org>
Jim Meyering <jim@meyering.net>
parents:
7302
diff
changeset
|
1215 free(p); |
| 5858 | 1216 fts_lfree(head); |
|
5867
67b499052f7f
* fts.c: Include fts_.h first, to check interface.
Paul Eggert <eggert@cs.ucla.edu>
parents:
5858
diff
changeset
|
1217 closedir(dirp); |
| 5858 | 1218 cur->fts_info = FTS_ERR; |
| 1219 SET(FTS_STOP); | |
| 1220 __set_errno (saved_errno); | |
| 1221 return (NULL); | |
| 1222 } | |
| 1223 /* Did realloc() change the pointer? */ | |
| 1224 if (oldaddr != sp->fts_path) { | |
| 1225 doadjust = true; | |
| 1226 if (ISSET(FTS_NOCHDIR)) | |
| 1227 cp = sp->fts_path + len; | |
| 1228 } | |
| 1229 maxlen = sp->fts_pathlen - len; | |
| 1230 } | |
| 1231 | |
|
6949
96af1224c6fa
* backupfile.c, dirfd.h, fts.c, getcwd.c, glob.c, glob_.h:
Paul Eggert <eggert@cs.ucla.edu>
parents:
6934
diff
changeset
|
1232 new_len = len + _D_EXACT_NAMLEN (dp); |
| 5858 | 1233 if (new_len < len) { |
| 1234 /* | |
|
9718
5954dae30c7f
* lib/fts.c (fts_build): Typo correction to comment.
Martin Buchholz <martin@xemacs.org>
parents:
9613
diff
changeset
|
1235 * In the unlikely event that we would end up |
| 5907 | 1236 * with a file name longer than SIZE_MAX, free up |
| 5858 | 1237 * the current structure and the structures already |
| 1238 * allocated, then error out with ENAMETOOLONG. | |
| 1239 */ | |
| 1240 free(p); | |
| 1241 fts_lfree(head); | |
|
5867
67b499052f7f
* fts.c: Include fts_.h first, to check interface.
Paul Eggert <eggert@cs.ucla.edu>
parents:
5858
diff
changeset
|
1242 closedir(dirp); |
| 5858 | 1243 cur->fts_info = FTS_ERR; |
| 1244 SET(FTS_STOP); | |
| 1245 __set_errno (ENAMETOOLONG); | |
| 1246 return (NULL); | |
| 1247 } | |
| 1248 p->fts_level = level; | |
| 1249 p->fts_parent = sp->fts_cur; | |
| 1250 p->fts_pathlen = new_len; | |
| 1251 | |
| 1252 #if defined FTS_WHITEOUT && 0 | |
| 1253 if (dp->d_type == DT_WHT) | |
| 1254 p->fts_flags |= FTS_ISW; | |
| 1255 #endif | |
|
10481
47fe4e48e158
fts: sort dirent entries on inode number before traversing
Jim Meyering <meyering@redhat.com>
parents:
9718
diff
changeset
|
1256 /* Store dirent.d_ino, in case we need to sort |
|
47fe4e48e158
fts: sort dirent entries on inode number before traversing
Jim Meyering <meyering@redhat.com>
parents:
9718
diff
changeset
|
1257 entries before processing them. */ |
|
47fe4e48e158
fts: sort dirent entries on inode number before traversing
Jim Meyering <meyering@redhat.com>
parents:
9718
diff
changeset
|
1258 p->fts_statp->st_ino = D_INO (dp); |
| 5858 | 1259 |
| 7151 | 1260 /* Build a file name for fts_stat to stat. */ |
| 1261 if (ISSET(FTS_NOCHDIR)) { | |
| 1262 p->fts_accpath = p->fts_path; | |
| 1263 memmove(cp, p->fts_name, p->fts_namelen + 1); | |
| 1264 } else | |
| 1265 p->fts_accpath = p->fts_name; | |
|
7482
26914593f079
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Jim Meyering <jim@meyering.net>
parents:
7408
diff
changeset
|
1266 |
|
26914593f079
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Jim Meyering <jim@meyering.net>
parents:
7408
diff
changeset
|
1267 if (sp->fts_compar == NULL || ISSET(FTS_DEFER_STAT)) { |
|
26914593f079
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Jim Meyering <jim@meyering.net>
parents:
7408
diff
changeset
|
1268 /* Record what fts_read will have to do with this |
|
26914593f079
Big performance improvement for fts-based tools that use FTS_NOSTAT.
Jim Meyering <jim@meyering.net>
parents:
7408
diff
changeset
|
1269 entry. In many cases, it will simply fts_stat it, |
|
26914593f079
Big performance improvement for fts-based tools that use FTS_NOSTAT.
Jim Meyering <jim@meyering.net>
parents:
7408
diff
changeset
|
1270 but we can take advantage of any d_type information |
|
26914593f079
Big performance improvement for fts-based tools that use FTS_NOSTAT.
Jim Meyering <jim@meyering.net>
parents:
7408
diff
changeset
|
1271 to optimize away the unnecessary stat calls. I.e., |
|
26914593f079
Big performance improvement for fts-based tools that use FTS_NOSTAT.
Jim Meyering <jim@meyering.net>
parents:
7408
diff
changeset
|
1272 if FTS_NOSTAT is in effect and we're not following |
|
26914593f079
Big performance improvement for fts-based tools that use FTS_NOSTAT.
Jim Meyering <jim@meyering.net>
parents:
7408
diff
changeset
|
1273 symlinks (FTS_PHYSICAL) and d_type indicates this |
|
26914593f079
Big performance improvement for fts-based tools that use FTS_NOSTAT.
Jim Meyering <jim@meyering.net>
parents:
7408
diff
changeset
|
1274 is *not* a directory, then we won't have to stat it |
|
26914593f079
Big performance improvement for fts-based tools that use FTS_NOSTAT.
Jim Meyering <jim@meyering.net>
parents:
7408
diff
changeset
|
1275 at all. If it *is* a directory, then (currently) |
|
26914593f079
Big performance improvement for fts-based tools that use FTS_NOSTAT.
Jim Meyering <jim@meyering.net>
parents:
7408
diff
changeset
|
1276 we stat it regardless, in order to get device and |
|
26914593f079
Big performance improvement for fts-based tools that use FTS_NOSTAT.
Jim Meyering <jim@meyering.net>
parents:
7408
diff
changeset
|
1277 inode numbers. Some day we might optimize that |
|
26914593f079
Big performance improvement for fts-based tools that use FTS_NOSTAT.
Jim Meyering <jim@meyering.net>
parents:
7408
diff
changeset
|
1278 away, too, for directories where d_ino is known to |
|
26914593f079
Big performance improvement for fts-based tools that use FTS_NOSTAT.
Jim Meyering <jim@meyering.net>
parents:
7408
diff
changeset
|
1279 be valid. */ |
|
26914593f079
Big performance improvement for fts-based tools that use FTS_NOSTAT.
Jim Meyering <jim@meyering.net>
parents:
7408
diff
changeset
|
1280 bool skip_stat = (ISSET(FTS_PHYSICAL) |
|
26914593f079
Big performance improvement for fts-based tools that use FTS_NOSTAT.
Jim Meyering <jim@meyering.net>
parents:
7408
diff
changeset
|
1281 && ISSET(FTS_NOSTAT) |
|
26914593f079
Big performance improvement for fts-based tools that use FTS_NOSTAT.
Jim Meyering <jim@meyering.net>
parents:
7408
diff
changeset
|
1282 && DT_IS_KNOWN(dp) |
|
26914593f079
Big performance improvement for fts-based tools that use FTS_NOSTAT.
Jim Meyering <jim@meyering.net>
parents:
7408
diff
changeset
|
1283 && ! DT_MUST_BE(dp, DT_DIR)); |
|
26914593f079
Big performance improvement for fts-based tools that use FTS_NOSTAT.
Jim Meyering <jim@meyering.net>
parents:
7408
diff
changeset
|
1284 p->fts_info = FTS_NSOK; |
|
10843
36479bd141ee
fts: provide dirent.d_type via FTSENT.fts_statp, when possible
Jim Meyering <meyering@redhat.com>
parents:
10688
diff
changeset
|
1285 /* Propagate dirent.d_type information back |
|
36479bd141ee
fts: provide dirent.d_type via FTSENT.fts_statp, when possible
Jim Meyering <meyering@redhat.com>
parents:
10688
diff
changeset
|
1286 to caller, when possible. */ |
|
36479bd141ee
fts: provide dirent.d_type via FTSENT.fts_statp, when possible
Jim Meyering <meyering@redhat.com>
parents:
10688
diff
changeset
|
1287 set_stat_type (p->fts_statp, D_TYPE (dp)); |
|
7482
26914593f079
Big performance improvement for fts-based tools that use FTS_NOSTAT.
Jim Meyering <jim@meyering.net>
parents:
7408
diff
changeset
|
1288 fts_set_stat_required(p, !skip_stat); |
|
11162
15e1c0e6fd35
fts: correct internal computation of nlinks (optimization-related)
Jim Meyering <meyering@redhat.com>
parents:
10863
diff
changeset
|
1289 is_dir = (ISSET(FTS_PHYSICAL) |
|
7482
26914593f079
Big performance improvement for fts-based tools that use FTS_NOSTAT.
Jim Meyering <jim@meyering.net>
parents:
7408
diff
changeset
|
1290 && DT_MUST_BE(dp, DT_DIR)); |
|
26914593f079
Big performance improvement for fts-based tools that use FTS_NOSTAT.
Jim Meyering <jim@meyering.net>
parents:
7408
diff
changeset
|
1291 } else { |
|
26914593f079
Big performance improvement for fts-based tools that use FTS_NOSTAT.
Jim Meyering <jim@meyering.net>
parents:
7408
diff
changeset
|
1292 p->fts_info = fts_stat(sp, p, false); |
|
26914593f079
Big performance improvement for fts-based tools that use FTS_NOSTAT.
Jim Meyering <jim@meyering.net>
parents:
7408
diff
changeset
|
1293 is_dir = (p->fts_info == FTS_D |
|
26914593f079
Big performance improvement for fts-based tools that use FTS_NOSTAT.
Jim Meyering <jim@meyering.net>
parents:
7408
diff
changeset
|
1294 || p->fts_info == FTS_DC |
|
26914593f079
Big performance improvement for fts-based tools that use FTS_NOSTAT.
Jim Meyering <jim@meyering.net>
parents:
7408
diff
changeset
|
1295 || p->fts_info == FTS_DOT); |
|
26914593f079
Big performance improvement for fts-based tools that use FTS_NOSTAT.
Jim Meyering <jim@meyering.net>
parents:
7408
diff
changeset
|
1296 } |
| 5858 | 1297 |
| 7151 | 1298 /* Decrement link count if applicable. */ |
|
7482
26914593f079
Big performance improvement for fts-based tools that use FTS_NOSTAT.
Jim Meyering <jim@meyering.net>
parents:
7408
diff
changeset
|
1299 if (nlinks > 0 && is_dir) |
| 7151 | 1300 nlinks -= nostat; |
| 5858 | 1301 |
| 1302 /* We walk in directory order so "ls -f" doesn't get upset. */ | |
| 1303 p->fts_link = NULL; | |
| 1304 if (head == NULL) | |
| 1305 head = tail = p; | |
| 1306 else { | |
| 1307 tail->fts_link = p; | |
| 1308 tail = p; | |
| 1309 } | |
| 1310 ++nitems; | |
| 1311 } | |
| 1312 if (dirp) | |
|
5867
67b499052f7f
* fts.c: Include fts_.h first, to check interface.
Paul Eggert <eggert@cs.ucla.edu>
parents:
5858
diff
changeset
|
1313 closedir(dirp); |
| 5858 | 1314 |
| 1315 /* | |
| 5907 | 1316 * If realloc() changed the address of the file name, adjust the |
| 5858 | 1317 * addresses for the rest of the tree and the dir list. |
| 1318 */ | |
| 1319 if (doadjust) | |
| 1320 fts_padjust(sp, head); | |
| 1321 | |
| 1322 /* | |
| 5907 | 1323 * If not changing directories, reset the file name back to original |
| 5858 | 1324 * state. |
| 1325 */ | |
| 1326 if (ISSET(FTS_NOCHDIR)) { | |
| 1327 if (len == sp->fts_pathlen || nitems == 0) | |
| 1328 --cp; | |
| 1329 *cp = '\0'; | |
| 1330 } | |
| 1331 | |
| 1332 /* | |
| 1333 * If descended after called from fts_children or after called from | |
| 1334 * fts_read and nothing found, get back. At the root level we use | |
| 5907 | 1335 * the saved fd; if one of fts_open()'s arguments is a relative name |
| 5858 | 1336 * to an empty directory, we wind up here with no other way back. If |
| 1337 * can't get back, we're done. | |
| 1338 */ | |
| 1339 if (descend && (type == BCHILD || !nitems) && | |
| 7151 | 1340 (cur->fts_level == FTS_ROOTLEVEL |
| 1341 ? RESTORE_INITIAL_CWD(sp) | |
| 1342 : fts_safe_changedir(sp, cur->fts_parent, -1, ".."))) { | |
| 5858 | 1343 cur->fts_info = FTS_ERR; |
| 1344 SET(FTS_STOP); | |
| 7151 | 1345 fts_lfree(head); |
| 5858 | 1346 return (NULL); |
| 1347 } | |
| 1348 | |
| 1349 /* If didn't find anything, return NULL. */ | |
| 1350 if (!nitems) { | |
| 1351 if (type == BREAD) | |
| 1352 cur->fts_info = FTS_DP; | |
| 7151 | 1353 fts_lfree(head); |
| 5858 | 1354 return (NULL); |
| 1355 } | |
| 1356 | |
|
10481
47fe4e48e158
fts: sort dirent entries on inode number before traversing
Jim Meyering <meyering@redhat.com>
parents:
9718
diff
changeset
|
1357 /* If there are many entries, no sorting function has been specified, |
|
47fe4e48e158
fts: sort dirent entries on inode number before traversing
Jim Meyering <meyering@redhat.com>
parents:
9718
diff
changeset
|
1358 and this file system is of a type that may be slow with a large |
|
47fe4e48e158
fts: sort dirent entries on inode number before traversing
Jim Meyering <meyering@redhat.com>
parents:
9718
diff
changeset
|
1359 number of entries, then sort the directory entries on increasing |
|
47fe4e48e158
fts: sort dirent entries on inode number before traversing
Jim Meyering <meyering@redhat.com>
parents:
9718
diff
changeset
|
1360 inode numbers. */ |
|
47fe4e48e158
fts: sort dirent entries on inode number before traversing
Jim Meyering <meyering@redhat.com>
parents:
9718
diff
changeset
|
1361 if (nitems > _FTS_INODE_SORT_DIR_ENTRIES_THRESHOLD |
|
47fe4e48e158
fts: sort dirent entries on inode number before traversing
Jim Meyering <meyering@redhat.com>
parents:
9718
diff
changeset
|
1362 && !sp->fts_compar |
|
10561
5e359fc738d5
fts.c: adjust a new interface to be more generally useful
Jim Meyering <meyering@redhat.com>
parents:
10482
diff
changeset
|
1363 && ISSET (FTS_CWDFD) |
|
5e359fc738d5
fts.c: adjust a new interface to be more generally useful
Jim Meyering <meyering@redhat.com>
parents:
10482
diff
changeset
|
1364 && dirent_inode_sort_may_be_useful (sp->fts_cwd_fd)) { |
|
10481
47fe4e48e158
fts: sort dirent entries on inode number before traversing
Jim Meyering <meyering@redhat.com>
parents:
9718
diff
changeset
|
1365 sp->fts_compar = fts_compare_ino; |
|
47fe4e48e158
fts: sort dirent entries on inode number before traversing
Jim Meyering <meyering@redhat.com>
parents:
9718
diff
changeset
|
1366 head = fts_sort (sp, head, nitems); |
|
47fe4e48e158
fts: sort dirent entries on inode number before traversing
Jim Meyering <meyering@redhat.com>
parents:
9718
diff
changeset
|
1367 sp->fts_compar = NULL; |
|
47fe4e48e158
fts: sort dirent entries on inode number before traversing
Jim Meyering <meyering@redhat.com>
parents:
9718
diff
changeset
|
1368 } |
|
47fe4e48e158
fts: sort dirent entries on inode number before traversing
Jim Meyering <meyering@redhat.com>
parents:
9718
diff
changeset
|
1369 |
| 5858 | 1370 /* Sort the entries. */ |
| 1371 if (sp->fts_compar && nitems > 1) | |
| 1372 head = fts_sort(sp, head, nitems); | |
| 1373 return (head); | |
| 1374 } | |
| 1375 | |
| 1376 #if FTS_DEBUG | |
| 1377 | |
| 1378 /* Walk ->fts_parent links starting at E_CURR, until the root of the | |
| 1379 current hierarchy. There should be a directory with dev/inode | |
| 1380 matching those of AD. If not, print a lot of diagnostics. */ | |
| 1381 static void | |
| 1382 find_matching_ancestor (FTSENT const *e_curr, struct Active_dir const *ad) | |
| 1383 { | |
| 1384 FTSENT const *ent; | |
| 1385 for (ent = e_curr; ent->fts_level >= FTS_ROOTLEVEL; ent = ent->fts_parent) | |
| 1386 { | |
| 1387 if (ad->ino == ent->fts_statp->st_ino | |
| 1388 && ad->dev == ent->fts_statp->st_dev) | |
| 1389 return; | |
| 1390 } | |
| 1391 printf ("ERROR: tree dir, %s, not active\n", ad->fts_ent->fts_accpath); | |
| 1392 printf ("active dirs:\n"); | |
| 1393 for (ent = e_curr; | |
| 1394 ent->fts_level >= FTS_ROOTLEVEL; ent = ent->fts_parent) | |
| 1395 printf (" %s(%"PRIuMAX"/%"PRIuMAX") to %s(%"PRIuMAX"/%"PRIuMAX")...\n", | |
| 1396 ad->fts_ent->fts_accpath, | |
| 1397 (uintmax_t) ad->dev, | |
| 1398 (uintmax_t) ad->ino, | |
| 1399 ent->fts_accpath, | |
| 1400 (uintmax_t) ent->fts_statp->st_dev, | |
| 1401 (uintmax_t) ent->fts_statp->st_ino); | |
| 1402 } | |
| 1403 | |
| 1404 void | |
| 1405 fts_cross_check (FTS const *sp) | |
| 1406 { | |
| 1407 FTSENT const *ent = sp->fts_cur; | |
| 1408 FTSENT const *t; | |
| 1409 if ( ! ISSET (FTS_TIGHT_CYCLE_CHECK)) | |
| 1410 return; | |
| 1411 | |
| 1412 Dprintf (("fts-cross-check cur=%s\n", ent->fts_path)); | |
| 1413 /* Make sure every parent dir is in the tree. */ | |
| 1414 for (t = ent->fts_parent; t->fts_level >= FTS_ROOTLEVEL; t = t->fts_parent) | |
| 1415 { | |
| 1416 struct Active_dir ad; | |
| 1417 ad.ino = t->fts_statp->st_ino; | |
| 1418 ad.dev = t->fts_statp->st_dev; | |
|
6034
96149b1bbb32
(fts_cross_check) [FTS_DEBUG]: s/active_dir_ht/fts_cycle.ht/.
Jim Meyering <jim@meyering.net>
parents:
5907
diff
changeset
|
1419 if ( ! hash_lookup (sp->fts_cycle.ht, &ad)) |
| 5858 | 1420 printf ("ERROR: active dir, %s, not in tree\n", t->fts_path); |
| 1421 } | |
| 1422 | |
| 1423 /* Make sure every dir in the tree is an active dir. | |
| 1424 But ENT is not necessarily a directory. If so, just skip this part. */ | |
| 1425 if (ent->fts_parent->fts_level >= FTS_ROOTLEVEL | |
| 1426 && (ent->fts_info == FTS_DP | |
| 1427 || ent->fts_info == FTS_D)) | |
| 1428 { | |
| 1429 struct Active_dir *ad; | |
|
6034
96149b1bbb32
(fts_cross_check) [FTS_DEBUG]: s/active_dir_ht/fts_cycle.ht/.
Jim Meyering <jim@meyering.net>
parents:
5907
diff
changeset
|
1430 for (ad = hash_get_first (sp->fts_cycle.ht); ad != NULL; |
|
96149b1bbb32
(fts_cross_check) [FTS_DEBUG]: s/active_dir_ht/fts_cycle.ht/.
Jim Meyering <jim@meyering.net>
parents:
5907
diff
changeset
|
1431 ad = hash_get_next (sp->fts_cycle.ht, ad)) |
| 5858 | 1432 { |
| 1433 find_matching_ancestor (ent, ad); | |
| 1434 } | |
| 1435 } | |
| 1436 } | |
|
7639
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
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diff
changeset
|
1437 |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
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diff
changeset
|
1438 static bool |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
1439 same_fd (int fd1, int fd2) |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
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diff
changeset
|
1440 { |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
1441 struct stat sb1, sb2; |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
1442 return (fstat (fd1, &sb1) == 0 |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
1443 && fstat (fd2, &sb2) == 0 |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
1444 && SAME_INODE (sb1, sb2)); |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
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diff
changeset
|
1445 } |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
1446 |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
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diff
changeset
|
1447 static void |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
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diff
changeset
|
1448 fd_ring_print (FTS const *sp, FILE *stream, char const *msg) |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
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diff
changeset
|
1449 { |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
1450 I_ring const *fd_ring = &sp->fts_fd_ring; |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
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diff
changeset
|
1451 unsigned int i = fd_ring->fts_front; |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
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diff
changeset
|
1452 char *cwd = getcwdat (sp->fts_cwd_fd, NULL, 0); |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
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diff
changeset
|
1453 fprintf (stream, "=== %s ========== %s\n", msg, cwd); |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
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diff
changeset
|
1454 free (cwd); |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
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changeset
|
1455 if (i_ring_empty (fd_ring)) |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
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diff
changeset
|
1456 return; |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
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diff
changeset
|
1457 |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
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diff
changeset
|
1458 while (true) |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
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|
1459 { |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
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diff
changeset
|
1460 int fd = fd_ring->fts_fd_ring[i]; |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
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changeset
|
1461 if (fd < 0) |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
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changeset
|
1462 fprintf (stream, "%d: %d:\n", i, fd); |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
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|
1463 else |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
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|
1464 { |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
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changeset
|
1465 char *wd = getcwdat (fd, NULL, 0); |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
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changeset
|
1466 fprintf (stream, "%d: %d: %s\n", i, fd, wd); |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
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changeset
|
1467 free (wd); |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
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|
1468 } |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
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changeset
|
1469 if (i == fd_ring->fts_back) |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
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|
1470 break; |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
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|
1471 i = (i + I_RING_SIZE - 1) % I_RING_SIZE; |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
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|
1472 } |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
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diff
changeset
|
1473 } |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
1474 |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
1475 /* Ensure that each file descriptor on the fd_ring matches a |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
1476 parent, grandparent, etc. of the current working directory. */ |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
1477 static void |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
1478 fd_ring_check (FTS const *sp) |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
1479 { |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
1480 if (!fts_debug) |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
1481 return; |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
1482 |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
1483 /* Make a writable copy. */ |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
1484 I_ring fd_w = sp->fts_fd_ring; |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
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parents:
7635
diff
changeset
|
1485 |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
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diff
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|
1486 int cwd_fd = sp->fts_cwd_fd; |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
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7635
diff
changeset
|
1487 cwd_fd = dup (cwd_fd); |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
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diff
changeset
|
1488 char *dot = getcwdat (cwd_fd, NULL, 0); |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
1489 error (0, 0, "===== check ===== cwd: %s", dot); |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
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diff
changeset
|
1490 free (dot); |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
1491 while ( ! i_ring_empty (&fd_w)) |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
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|
1492 { |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
1493 int fd = i_ring_pop (&fd_w); |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
1494 if (0 <= fd) |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
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|
1495 { |
|
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Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
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|
1496 int parent_fd = openat (cwd_fd, "..", O_RDONLY); |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
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parents:
7635
diff
changeset
|
1497 if (parent_fd < 0) |
|
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Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
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|
1498 { |
|
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Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
1499 // Warn? |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
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|
1500 break; |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
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parents:
7635
diff
changeset
|
1501 } |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
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diff
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|
1502 if (!same_fd (fd, parent_fd)) |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
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diff
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|
1503 { |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
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|
1504 char *cwd = getcwdat (fd, NULL, 0); |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
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diff
changeset
|
1505 error (0, errno, "ring : %s", cwd); |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
1506 char *c2 = getcwdat (parent_fd, NULL, 0); |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
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diff
changeset
|
1507 error (0, errno, "parent: %s", c2); |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
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diff
changeset
|
1508 free (cwd); |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
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diff
changeset
|
1509 free (c2); |
|
7785
3246679850d5
Slight readability improvement: use an assert-like macro
Jim Meyering <jim@meyering.net>
parents:
7707
diff
changeset
|
1510 fts_assert (0); |
|
7639
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
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diff
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|
1511 } |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
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diff
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|
1512 close (cwd_fd); |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
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diff
changeset
|
1513 cwd_fd = parent_fd; |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
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diff
changeset
|
1514 } |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
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diff
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|
1515 } |
|
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Make fts (in FTS_CWDFD mode) more efficient by caching a few open
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diff
changeset
|
1516 close (cwd_fd); |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
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|
1517 } |
| 5858 | 1518 #endif |
| 1519 | |
| 1520 static unsigned short int | |
| 1521 internal_function | |
| 1522 fts_stat(FTS *sp, register FTSENT *p, bool follow) | |
| 1523 { | |
| 1524 struct stat *sbp = p->fts_statp; | |
| 1525 int saved_errno; | |
| 1526 | |
|
7482
26914593f079
Big performance improvement for fts-based tools that use FTS_NOSTAT.
Jim Meyering <jim@meyering.net>
parents:
7408
diff
changeset
|
1527 if (p->fts_level == FTS_ROOTLEVEL && ISSET(FTS_COMFOLLOW)) |
|
26914593f079
Big performance improvement for fts-based tools that use FTS_NOSTAT.
Jim Meyering <jim@meyering.net>
parents:
7408
diff
changeset
|
1528 follow = true; |
|
26914593f079
Big performance improvement for fts-based tools that use FTS_NOSTAT.
Jim Meyering <jim@meyering.net>
parents:
7408
diff
changeset
|
1529 |
| 5858 | 1530 #if defined FTS_WHITEOUT && 0 |
| 1531 /* check for whiteout */ | |
| 1532 if (p->fts_flags & FTS_ISW) { | |
| 1533 memset(sbp, '\0', sizeof (*sbp)); | |
| 1534 sbp->st_mode = S_IFWHT; | |
| 1535 return (FTS_W); | |
| 1536 } | |
| 1537 #endif | |
| 1538 | |
| 1539 /* | |
| 1540 * If doing a logical walk, or application requested FTS_FOLLOW, do | |
| 1541 * a stat(2). If that fails, check for a non-existent symlink. If | |
| 1542 * fail, set the errno from the stat call. | |
| 1543 */ | |
| 1544 if (ISSET(FTS_LOGICAL) || follow) { | |
| 1545 if (stat(p->fts_accpath, sbp)) { | |
| 1546 saved_errno = errno; | |
|
6611
e4456c51dde7
Sync from the stable (b5) branch of coreutils:
Jim Meyering <jim@meyering.net>
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6540
diff
changeset
|
1547 if (errno == ENOENT |
|
e4456c51dde7
Sync from the stable (b5) branch of coreutils:
Jim Meyering <jim@meyering.net>
parents:
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diff
changeset
|
1548 && lstat(p->fts_accpath, sbp) == 0) { |
| 5858 | 1549 __set_errno (0); |
| 1550 return (FTS_SLNONE); | |
| 1551 } | |
| 1552 p->fts_errno = saved_errno; | |
| 1553 goto err; | |
| 1554 } | |
| 7151 | 1555 } else if (fstatat(sp->fts_cwd_fd, p->fts_accpath, sbp, |
| 1556 AT_SYMLINK_NOFOLLOW)) { | |
| 5858 | 1557 p->fts_errno = errno; |
| 1558 err: memset(sbp, 0, sizeof(struct stat)); | |
| 1559 return (FTS_NS); | |
| 1560 } | |
| 1561 | |
| 1562 if (S_ISDIR(sbp->st_mode)) { | |
|
7482
26914593f079
Big performance improvement for fts-based tools that use FTS_NOSTAT.
Jim Meyering <jim@meyering.net>
parents:
7408
diff
changeset
|
1563 if (ISDOT(p->fts_name)) { |
|
26914593f079
Big performance improvement for fts-based tools that use FTS_NOSTAT.
Jim Meyering <jim@meyering.net>
parents:
7408
diff
changeset
|
1564 /* Command-line "." and ".." are real directories. */ |
|
26914593f079
Big performance improvement for fts-based tools that use FTS_NOSTAT.
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parents:
7408
diff
changeset
|
1565 return (p->fts_level == FTS_ROOTLEVEL ? FTS_D : FTS_DOT); |
|
26914593f079
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Jim Meyering <jim@meyering.net>
parents:
7408
diff
changeset
|
1566 } |
| 5872 | 1567 |
|
7797
10432bdf90d3
2007-01-08 Bruno Haible <bruno@clisp.org>
Bruno Haible <bruno@clisp.org>
parents:
7786
diff
changeset
|
1568 #if !GNULIB_FTS |
| 5872 | 1569 { |
| 1570 /* | |
| 1571 * Cycle detection is done by brute force when the directory | |
| 1572 * is first encountered. If the tree gets deep enough or the | |
| 1573 * number of symbolic links to directories is high enough, | |
| 1574 * something faster might be worthwhile. | |
| 1575 */ | |
| 1576 FTSENT *t; | |
| 1577 | |
| 1578 for (t = p->fts_parent; | |
| 1579 t->fts_level >= FTS_ROOTLEVEL; t = t->fts_parent) | |
| 1580 if (sbp->st_ino == t->fts_statp->st_ino | |
| 1581 && sbp->st_dev == t->fts_statp->st_dev) | |
| 1582 { | |
| 1583 p->fts_cycle = t; | |
| 1584 return (FTS_DC); | |
| 1585 } | |
| 1586 } | |
| 1587 #endif | |
| 1588 | |
| 5858 | 1589 return (FTS_D); |
| 1590 } | |
| 1591 if (S_ISLNK(sbp->st_mode)) | |
| 1592 return (FTS_SL); | |
| 1593 if (S_ISREG(sbp->st_mode)) | |
| 1594 return (FTS_F); | |
| 1595 return (FTS_DEFAULT); | |
| 1596 } | |
| 1597 | |
| 1598 static int | |
| 1599 fts_compar (void const *a, void const *b) | |
| 1600 { | |
| 1601 /* Convert A and B to the correct types, to pacify the compiler, and | |
| 1602 for portability to bizarre hosts where "void const *" and "FTSENT | |
| 1603 const **" differ in runtime representation. The comparison | |
| 1604 function cannot modify *a and *b, but there is no compile-time | |
| 1605 check for this. */ | |
| 1606 FTSENT const **pa = (FTSENT const **) a; | |
| 1607 FTSENT const **pb = (FTSENT const **) b; | |
| 1608 return pa[0]->fts_fts->fts_compar (pa, pb); | |
| 1609 } | |
| 1610 | |
| 1611 static FTSENT * | |
| 1612 internal_function | |
| 1613 fts_sort (FTS *sp, FTSENT *head, register size_t nitems) | |
| 1614 { | |
| 1615 register FTSENT **ap, *p; | |
| 1616 | |
| 1617 /* On most modern hosts, void * and FTSENT ** have the same | |
| 1618 run-time representation, and one can convert sp->fts_compar to | |
| 1619 the type qsort expects without problem. Use the heuristic that | |
| 1620 this is OK if the two pointer types are the same size, and if | |
| 1621 converting FTSENT ** to long int is the same as converting | |
| 1622 FTSENT ** to void * and then to long int. This heuristic isn't | |
| 1623 valid in general but we don't know of any counterexamples. */ | |
| 1624 FTSENT *dummy; | |
| 1625 int (*compare) (void const *, void const *) = | |
| 1626 ((sizeof &dummy == sizeof (void *) | |
| 1627 && (long int) &dummy == (long int) (void *) &dummy) | |
| 1628 ? (int (*) (void const *, void const *)) sp->fts_compar | |
| 1629 : fts_compar); | |
| 1630 | |
| 1631 /* | |
| 1632 * Construct an array of pointers to the structures and call qsort(3). | |
| 1633 * Reassemble the array in the order returned by qsort. If unable to | |
| 1634 * sort for memory reasons, return the directory entries in their | |
| 1635 * current order. Allocate enough space for the current needs plus | |
| 1636 * 40 so don't realloc one entry at a time. | |
| 1637 */ | |
| 1638 if (nitems > sp->fts_nitems) { | |
|
9562
1850c982220c
Avoid use of private FTS type name.
Jim Meyering <jim@meyering.net>
parents:
9309
diff
changeset
|
1639 FTSENT **a; |
| 5858 | 1640 |
| 1641 sp->fts_nitems = nitems + 40; | |
| 1642 if (SIZE_MAX / sizeof *a < sp->fts_nitems | |
| 1643 || ! (a = realloc (sp->fts_array, | |
| 1644 sp->fts_nitems * sizeof *a))) { | |
| 1645 free(sp->fts_array); | |
| 1646 sp->fts_array = NULL; | |
| 1647 sp->fts_nitems = 0; | |
| 1648 return (head); | |
| 1649 } | |
| 1650 sp->fts_array = a; | |
| 1651 } | |
| 1652 for (ap = sp->fts_array, p = head; p; p = p->fts_link) | |
| 1653 *ap++ = p; | |
| 1654 qsort((void *)sp->fts_array, nitems, sizeof(FTSENT *), compare); | |
| 1655 for (head = *(ap = sp->fts_array); --nitems; ++ap) | |
| 1656 ap[0]->fts_link = ap[1]; | |
| 1657 ap[0]->fts_link = NULL; | |
| 1658 return (head); | |
| 1659 } | |
| 1660 | |
| 1661 static FTSENT * | |
| 1662 internal_function | |
| 1663 fts_alloc (FTS *sp, const char *name, register size_t namelen) | |
| 1664 { | |
| 1665 register FTSENT *p; | |
| 1666 size_t len; | |
| 1667 | |
| 1668 /* | |
| 1669 * The file name is a variable length array. Allocate the FTSENT | |
| 1670 * structure and the file name in one chunk. | |
| 1671 */ | |
| 1672 len = sizeof(FTSENT) + namelen; | |
| 1673 if ((p = malloc(len)) == NULL) | |
| 1674 return (NULL); | |
| 1675 | |
| 1676 /* Copy the name and guarantee NUL termination. */ | |
| 1677 memmove(p->fts_name, name, namelen); | |
| 1678 p->fts_name[namelen] = '\0'; | |
| 1679 | |
| 1680 p->fts_namelen = namelen; | |
| 1681 p->fts_fts = sp; | |
| 1682 p->fts_path = sp->fts_path; | |
| 1683 p->fts_errno = 0; | |
| 1684 p->fts_flags = 0; | |
| 1685 p->fts_instr = FTS_NOINSTR; | |
| 1686 p->fts_number = 0; | |
| 1687 p->fts_pointer = NULL; | |
| 1688 return (p); | |
| 1689 } | |
| 1690 | |
| 1691 static void | |
| 1692 internal_function | |
| 1693 fts_lfree (register FTSENT *head) | |
| 1694 { | |
| 1695 register FTSENT *p; | |
| 1696 | |
| 1697 /* Free a linked list of structures. */ | |
| 1698 while ((p = head)) { | |
| 1699 head = head->fts_link; | |
| 1700 free(p); | |
| 1701 } | |
| 1702 } | |
| 1703 | |
| 1704 /* | |
| 5907 | 1705 * Allow essentially unlimited file name lengths; find, rm, ls should |
| 1706 * all work on any tree. Most systems will allow creation of file | |
| 1707 * names much longer than MAXPATHLEN, even though the kernel won't | |
| 1708 * resolve them. Add the size (not just what's needed) plus 256 bytes | |
| 1709 * so don't realloc the file name 2 bytes at a time. | |
| 5858 | 1710 */ |
| 1711 static bool | |
| 1712 internal_function | |
| 1713 fts_palloc (FTS *sp, size_t more) | |
| 1714 { | |
| 1715 char *p; | |
| 1716 size_t new_len = sp->fts_pathlen + more + 256; | |
| 1717 | |
| 1718 /* | |
| 1719 * See if fts_pathlen would overflow. | |
| 1720 */ | |
| 1721 if (new_len < sp->fts_pathlen) { | |
|
7396
6f79ccad009d
2006-10-02 Dmitry V. Levin <ldv@altlinux.org>
Jim Meyering <jim@meyering.net>
parents:
7302
diff
changeset
|
1722 free(sp->fts_path); |
| 5858 | 1723 sp->fts_path = NULL; |
| 1724 __set_errno (ENAMETOOLONG); | |
| 1725 return false; | |
| 1726 } | |
| 1727 sp->fts_pathlen = new_len; | |
| 1728 p = realloc(sp->fts_path, sp->fts_pathlen); | |
| 1729 if (p == NULL) { | |
| 1730 free(sp->fts_path); | |
| 1731 sp->fts_path = NULL; | |
| 1732 return false; | |
| 1733 } | |
| 1734 sp->fts_path = p; | |
| 1735 return true; | |
| 1736 } | |
| 1737 | |
| 1738 /* | |
| 5907 | 1739 * When the file name is realloc'd, have to fix all of the pointers in |
| 1740 * structures already returned. | |
| 5858 | 1741 */ |
| 1742 static void | |
| 1743 internal_function | |
| 1744 fts_padjust (FTS *sp, FTSENT *head) | |
| 1745 { | |
| 1746 FTSENT *p; | |
| 1747 char *addr = sp->fts_path; | |
| 1748 | |
| 1749 #define ADJUST(p) do { \ | |
| 1750 if ((p)->fts_accpath != (p)->fts_name) { \ | |
| 1751 (p)->fts_accpath = \ | |
| 1752 (char *)addr + ((p)->fts_accpath - (p)->fts_path); \ | |
| 1753 } \ | |
| 1754 (p)->fts_path = addr; \ | |
| 1755 } while (0) | |
| 1756 /* Adjust the current set of children. */ | |
| 1757 for (p = sp->fts_child; p; p = p->fts_link) | |
| 1758 ADJUST(p); | |
| 1759 | |
| 1760 /* Adjust the rest of the tree, including the current level. */ | |
| 1761 for (p = head; p->fts_level >= FTS_ROOTLEVEL;) { | |
| 1762 ADJUST(p); | |
| 1763 p = p->fts_link ? p->fts_link : p->fts_parent; | |
| 1764 } | |
| 1765 } | |
| 1766 | |
| 1767 static size_t | |
| 1768 internal_function | |
| 1769 fts_maxarglen (char * const *argv) | |
| 1770 { | |
| 1771 size_t len, max; | |
| 1772 | |
| 1773 for (max = 0; *argv; ++argv) | |
| 1774 if ((len = strlen(*argv)) > max) | |
| 1775 max = len; | |
| 1776 return (max + 1); | |
| 1777 } | |
| 1778 | |
| 1779 /* | |
| 5907 | 1780 * Change to dir specified by fd or file name without getting |
| 5858 | 1781 * tricked by someone changing the world out from underneath us. |
| 1782 * Assumes p->fts_statp->st_dev and p->fts_statp->st_ino are filled in. | |
| 7151 | 1783 * If FD is non-negative, expect it to be used after this function returns, |
| 1784 * and to be closed eventually. So don't pass e.g., `dirfd(dirp)' and then | |
| 1785 * do closedir(dirp), because that would invalidate the saved FD. | |
| 1786 * Upon failure, close FD immediately and return nonzero. | |
| 5858 | 1787 */ |
| 1788 static int | |
| 1789 internal_function | |
| 5907 | 1790 fts_safe_changedir (FTS *sp, FTSENT *p, int fd, char const *dir) |
| 5858 | 1791 { |
| 7151 | 1792 int ret; |
|
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1793 bool is_dotdot = dir && STREQ (dir, ".."); |
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1794 int newfd; |
|
7623
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1795 |
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1796 /* This clause handles the unusual case in which FTS_NOCHDIR |
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1797 is specified, along with FTS_CWDFD. In that case, there is |
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1798 no need to change even the virtual cwd file descriptor. |
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1799 However, if FD is non-negative, we do close it here. */ |
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1800 if (ISSET (FTS_NOCHDIR)) |
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1801 { |
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1802 if (ISSET (FTS_CWDFD) && 0 <= fd) |
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1803 close (fd); |
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1804 return 0; |
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1805 } |
| 5858 | 1806 |
|
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1807 if (fd < 0 && is_dotdot && ISSET (FTS_CWDFD)) |
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1808 { |
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1809 /* When possible, skip the diropen and subsequent fstat+dev/ino |
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1810 comparison. I.e., when changing to parent directory |
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1811 (chdir ("..")), use a file descriptor from the ring and |
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1812 save the overhead of diropen+fstat, as well as avoiding |
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1813 failure when we lack "x" access to the virtual cwd. */ |
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1814 if ( ! i_ring_empty (&sp->fts_fd_ring)) |
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1815 { |
|
7681
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1816 int parent_fd; |
|
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1817 fd_ring_print (sp, stderr, "pre-pop"); |
|
7681
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1818 parent_fd = i_ring_pop (&sp->fts_fd_ring); |
|
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1819 is_dotdot = true; |
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1820 if (0 <= parent_fd) |
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1821 { |
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1822 fd = parent_fd; |
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1823 dir = NULL; |
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1824 } |
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1825 } |
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1826 } |
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1827 |
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1828 newfd = fd; |
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1829 if (fd < 0 && (newfd = diropen (sp, dir)) < 0) |
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1830 return -1; |
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1831 |
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1832 /* The following dev/inode check is necessary if we're doing a |
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1833 `logical' traversal (through symlinks, a la chown -L), if the |
|
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1834 system lacks O_NOFOLLOW support, or if we're changing to ".." |
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1835 (but not via a popped file descriptor). When changing to the |
|
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1836 name "..", O_NOFOLLOW can't help. In general, when the target is |
|
1670d42131d7
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1837 not "..", diropen's use of O_NOFOLLOW ensures we don't mistakenly |
|
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1838 follow a symlink, so we can avoid the expense of this fstat. */ |
| 7408 | 1839 if (ISSET(FTS_LOGICAL) || ! HAVE_WORKING_O_NOFOLLOW |
| 7151 | 1840 || (dir && STREQ (dir, ".."))) |
| 1841 { | |
| 1842 struct stat sb; | |
| 1843 if (fstat(newfd, &sb)) | |
| 1844 { | |
| 5858 | 1845 ret = -1; |
| 1846 goto bail; | |
| 7151 | 1847 } |
| 1848 if (p->fts_statp->st_dev != sb.st_dev | |
| 1849 || p->fts_statp->st_ino != sb.st_ino) | |
| 1850 { | |
| 5858 | 1851 __set_errno (ENOENT); /* disinformation */ |
| 1852 ret = -1; | |
| 1853 goto bail; | |
| 7151 | 1854 } |
| 1855 } | |
| 1856 | |
| 1857 if (ISSET(FTS_CWDFD)) | |
| 1858 { | |
|
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1859 cwd_advance_fd (sp, newfd, ! is_dotdot); |
| 7151 | 1860 return 0; |
| 1861 } | |
| 1862 | |
| 5858 | 1863 ret = fchdir(newfd); |
| 1864 bail: | |
| 1865 if (fd < 0) | |
| 7151 | 1866 { |
| 1867 int oerrno = errno; | |
| 1868 (void)close(newfd); | |
| 1869 __set_errno (oerrno); | |
| 1870 } | |
|
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1871 return ret; |
| 5858 | 1872 } |