Mercurial > gnulib
annotate lib/fts.c @ 10688:989b49566cae
Move the lstat() declaration to <sys/stat.h>.
| author | Bruno Haible <bruno@clisp.org> |
|---|---|
| date | Tue, 21 Oct 2008 01:05:43 +0200 |
| parents | 2b0380d48ff6 |
| children | 36479bd141ee |
| rev | line source |
|---|---|
| 5858 | 1 /* Traverse a file hierarchy. |
| 2 | |
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3 Copyright (C) 2004, 2005, 2006, 2007, 2008 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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* fts.c: Include fts_.h first, to check interface.
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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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(fts_cross_check) [FTS_DEBUG]: s/active_dir_ht/fts_cycle.ht/.
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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 #else |
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88 # define DT_IS_KNOWN(d) false |
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89 # define DT_MUST_BE(d, t) false |
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90 #endif |
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91 |
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92 enum |
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93 { |
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94 NOT_AN_INODE_NUMBER = 0 |
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95 }; |
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96 |
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97 #ifdef D_INO_IN_DIRENT |
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98 # define D_INO(dp) (dp)->d_ino |
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99 #else |
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100 /* Some systems don't have inodes, so fake them to avoid lots of ifdefs. */ |
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101 # define D_INO(dp) NOT_AN_INODE_NUMBER |
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102 #endif |
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103 |
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104 /* If there are more than this many entries in a directory, |
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105 and the conditions mentioned below are satisfied, then sort |
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106 the entries on inode number before any further processing. */ |
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107 #ifndef FTS_INODE_SORT_DIR_ENTRIES_THRESHOLD |
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108 # define FTS_INODE_SORT_DIR_ENTRIES_THRESHOLD 10000 |
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109 #endif |
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110 enum |
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111 { |
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112 _FTS_INODE_SORT_DIR_ENTRIES_THRESHOLD = FTS_INODE_SORT_DIR_ENTRIES_THRESHOLD |
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113 }; |
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114 |
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115 enum Fts_stat |
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116 { |
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117 FTS_NO_STAT_REQUIRED = 1, |
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118 FTS_STAT_REQUIRED = 2 |
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119 }; |
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120 |
| 5858 | 121 #ifdef _LIBC |
| 122 # undef close | |
| 123 # define close __close | |
| 124 # undef closedir | |
| 125 # define closedir __closedir | |
| 126 # undef fchdir | |
| 127 # define fchdir __fchdir | |
| 128 # undef open | |
| 129 # define open __open | |
| 130 # undef opendir | |
| 131 # define opendir __opendir | |
| 132 # undef readdir | |
| 133 # define readdir __readdir | |
| 134 #else | |
| 135 # undef internal_function | |
| 136 # define internal_function /* empty */ | |
| 137 #endif | |
| 138 | |
| 139 #ifndef __set_errno | |
| 140 # define __set_errno(Val) errno = (Val) | |
| 141 #endif | |
| 142 | |
| 143 #ifndef __attribute__ | |
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144 # if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 8) |
| 5858 | 145 # define __attribute__(x) /* empty */ |
| 146 # endif | |
| 147 #endif | |
| 148 | |
| 149 #ifndef ATTRIBUTE_UNUSED | |
| 150 # define ATTRIBUTE_UNUSED __attribute__ ((__unused__)) | |
| 151 #endif | |
| 152 | |
| 7151 | 153 /* If this host provides the openat function, then we can avoid |
| 154 attempting to open "." in some initialization code below. */ | |
| 155 #ifdef HAVE_OPENAT | |
| 156 # define HAVE_OPENAT_SUPPORT 1 | |
| 157 #else | |
| 158 # define HAVE_OPENAT_SUPPORT 0 | |
| 159 #endif | |
| 5858 | 160 |
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161 #ifdef NDEBUG |
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162 # define fts_assert(expr) ((void) 0) |
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163 #else |
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164 # define fts_assert(expr) \ |
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165 do \ |
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166 { \ |
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167 if (!(expr)) \ |
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168 abort (); \ |
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169 } \ |
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170 while (false) |
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171 #endif |
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172 |
| 5858 | 173 static FTSENT *fts_alloc (FTS *, const char *, size_t) internal_function; |
| 174 static FTSENT *fts_build (FTS *, int) internal_function; | |
| 175 static void fts_lfree (FTSENT *) internal_function; | |
| 176 static void fts_load (FTS *, FTSENT *) internal_function; | |
| 177 static size_t fts_maxarglen (char * const *) internal_function; | |
| 178 static void fts_padjust (FTS *, FTSENT *) internal_function; | |
| 179 static bool fts_palloc (FTS *, size_t) internal_function; | |
| 180 static FTSENT *fts_sort (FTS *, FTSENT *, size_t) internal_function; | |
| 181 static unsigned short int fts_stat (FTS *, FTSENT *, bool) internal_function; | |
| 182 static int fts_safe_changedir (FTS *, FTSENT *, int, const char *) | |
| 183 internal_function; | |
| 184 | |
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185 #if GNULIB_FTS |
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186 # include "fts-cycle.c" |
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187 #else |
| 5872 | 188 static bool enter_dir (FTS *fts, FTSENT *ent) { return true; } |
| 189 static void leave_dir (FTS *fts, FTSENT *ent) {} | |
| 190 static bool setup_dir (FTS *fts) { return true; } | |
| 191 static void free_dir (FTS *fts) {} | |
| 192 #endif | |
| 193 | |
| 5858 | 194 #ifndef MAX |
| 195 # define MAX(a,b) ((a) > (b) ? (a) : (b)) | |
| 196 #endif | |
| 197 | |
| 198 #ifndef SIZE_MAX | |
| 199 # define SIZE_MAX ((size_t) -1) | |
| 200 #endif | |
| 201 | |
| 202 #ifndef O_DIRECTORY | |
| 203 # define O_DIRECTORY 0 | |
| 204 #endif | |
| 205 | |
| 206 #define ISDOT(a) (a[0] == '.' && (!a[1] || (a[1] == '.' && !a[2]))) | |
| 7151 | 207 #define STREQ(a, b) (strcmp ((a), (b)) == 0) |
| 5858 | 208 |
| 209 #define CLR(opt) (sp->fts_options &= ~(opt)) | |
| 210 #define ISSET(opt) (sp->fts_options & (opt)) | |
| 211 #define SET(opt) (sp->fts_options |= (opt)) | |
| 212 | |
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213 /* FIXME: make this a function */ |
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214 #define RESTORE_INITIAL_CWD(sp) \ |
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215 (fd_ring_clear (&((sp)->fts_fd_ring)), \ |
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216 FCHDIR ((sp), (ISSET (FTS_CWDFD) ? AT_FDCWD : (sp)->fts_rfd))) |
| 7151 | 217 |
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218 /* FIXME: FTS_NOCHDIR is now misnamed. |
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219 Call it FTS_USE_FULL_RELATIVE_FILE_NAMES instead. */ |
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220 #define FCHDIR(sp, fd) \ |
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221 (!ISSET(FTS_NOCHDIR) && (ISSET(FTS_CWDFD) \ |
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222 ? (cwd_advance_fd ((sp), (fd), true), 0) \ |
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223 : fchdir (fd))) |
| 7151 | 224 |
| 5858 | 225 |
| 226 /* fts_build flags */ | |
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227 /* FIXME: make this an enum */ |
| 5858 | 228 #define BCHILD 1 /* fts_children */ |
| 229 #define BNAMES 2 /* fts_children, names only */ | |
| 230 #define BREAD 3 /* fts_read */ | |
| 231 | |
| 232 #if FTS_DEBUG | |
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233 # include <inttypes.h> |
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234 # include <stdint.h> |
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235 # include <stdio.h> |
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236 # include "getcwdat.h" |
| 5858 | 237 bool fts_debug = false; |
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238 # define Dprintf(x) do { if (fts_debug) printf x; } while (false) |
| 5858 | 239 #else |
| 240 # define Dprintf(x) | |
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241 # define fd_ring_check(x) |
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242 # define fd_ring_print(a, b, c) |
| 5858 | 243 #endif |
| 244 | |
| 245 #define LEAVE_DIR(Fts, Ent, Tag) \ | |
| 5872 | 246 do \ |
| 247 { \ | |
| 5858 | 248 Dprintf ((" %s-leaving: %s\n", Tag, (Ent)->fts_path)); \ |
| 5872 | 249 leave_dir (Fts, Ent); \ |
|
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250 fd_ring_check (Fts); \ |
| 5872 | 251 } \ |
| 252 while (false) | |
| 5858 | 253 |
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254 static void |
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255 fd_ring_clear (I_ring *fd_ring) |
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256 { |
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257 while ( ! i_ring_empty (fd_ring)) |
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258 { |
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259 int fd = i_ring_pop (fd_ring); |
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260 if (0 <= fd) |
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261 close (fd); |
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262 } |
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263 } |
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264 |
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265 /* Overload the fts_statp->st_size member (otherwise unused, when |
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266 fts_info is FTS_NSOK) to indicate whether fts_read should stat |
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267 this entry or not. */ |
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268 static void |
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269 fts_set_stat_required (FTSENT *p, bool required) |
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270 { |
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271 fts_assert (p->fts_info == FTS_NSOK); |
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272 p->fts_statp->st_size = (required |
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273 ? FTS_STAT_REQUIRED |
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274 : FTS_NO_STAT_REQUIRED); |
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275 } |
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276 |
| 7151 | 277 /* file-descriptor-relative opendir. */ |
| 278 /* FIXME: if others need this function, move it into lib/openat.c */ | |
| 279 static inline DIR * | |
| 280 internal_function | |
| 281 opendirat (int fd, char const *dir) | |
| 282 { | |
| 283 int new_fd = openat (fd, dir, O_RDONLY); | |
| 284 DIR *dirp; | |
| 285 | |
| 286 if (new_fd < 0) | |
| 287 return NULL; | |
| 288 dirp = fdopendir (new_fd); | |
| 289 if (dirp == NULL) | |
| 290 { | |
| 291 int saved_errno = errno; | |
| 292 close (new_fd); | |
| 293 errno = saved_errno; | |
| 294 } | |
| 295 return dirp; | |
| 296 } | |
| 297 | |
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298 /* Virtual fchdir. Advance SP's working directory file descriptor, |
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299 SP->fts_cwd_fd, to FD, and push the previous value onto the fd_ring. |
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300 CHDIR_DOWN_ONE is true if FD corresponds to an entry in the directory |
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301 open on sp->fts_cwd_fd; i.e., to move the working directory one level |
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302 down. */ |
| 7151 | 303 static void |
| 304 internal_function | |
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305 cwd_advance_fd (FTS *sp, int fd, bool chdir_down_one) |
| 7151 | 306 { |
| 307 int old = sp->fts_cwd_fd; | |
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308 fts_assert (old != fd || old == AT_FDCWD); |
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309 |
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310 if (chdir_down_one) |
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311 { |
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312 /* Push "old" onto the ring. |
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313 If the displaced file descriptor is non-negative, close it. */ |
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314 int prev_fd_in_slot = i_ring_push (&sp->fts_fd_ring, old); |
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315 fd_ring_print (sp, stderr, "post-push"); |
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316 if (0 <= prev_fd_in_slot) |
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317 close (prev_fd_in_slot); /* ignore any close failure */ |
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318 } |
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319 else if ( ! ISSET (FTS_NOCHDIR)) |
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320 { |
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321 if (0 <= old) |
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322 close (old); /* ignore any close failure */ |
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323 } |
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324 |
| 7151 | 325 sp->fts_cwd_fd = fd; |
| 326 } | |
| 327 | |
| 5858 | 328 /* Open the directory DIR if possible, and return a file |
| 329 descriptor. Return -1 and set errno on failure. It doesn't matter | |
| 330 whether the file descriptor has read or write access. */ | |
| 331 | |
| 7151 | 332 static inline int |
| 5858 | 333 internal_function |
| 7151 | 334 diropen (FTS const *sp, char const *dir) |
| 5858 | 335 { |
| 7151 | 336 int open_flags = (O_RDONLY | O_DIRECTORY | O_NOCTTY | O_NONBLOCK |
| 337 | (ISSET (FTS_PHYSICAL) ? O_NOFOLLOW : 0)); | |
| 338 | |
| 339 return (ISSET (FTS_CWDFD) | |
| 340 ? openat (sp->fts_cwd_fd, dir, open_flags) | |
| 341 : open (dir, open_flags)); | |
| 5858 | 342 } |
| 343 | |
| 344 FTS * | |
| 345 fts_open (char * const *argv, | |
| 346 register int options, | |
| 347 int (*compar) (FTSENT const **, FTSENT const **)) | |
| 348 { | |
| 349 register FTS *sp; | |
| 350 register FTSENT *p, *root; | |
| 351 register size_t nitems; | |
| 7151 | 352 FTSENT *parent = NULL; |
| 353 FTSENT *tmp = NULL; /* pacify gcc */ | |
| 5858 | 354 size_t len; |
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355 bool defer_stat; |
| 5858 | 356 |
| 357 /* Options check. */ | |
| 358 if (options & ~FTS_OPTIONMASK) { | |
| 359 __set_errno (EINVAL); | |
| 360 return (NULL); | |
| 361 } | |
| 7151 | 362 if ((options & FTS_NOCHDIR) && (options & FTS_CWDFD)) { |
| 363 __set_errno (EINVAL); | |
| 364 return (NULL); | |
| 365 } | |
| 366 if ( ! (options & (FTS_LOGICAL | FTS_PHYSICAL))) { | |
| 367 __set_errno (EINVAL); | |
| 368 return (NULL); | |
| 369 } | |
| 5858 | 370 |
| 371 /* Allocate/initialize the stream */ | |
| 372 if ((sp = malloc(sizeof(FTS))) == NULL) | |
| 373 return (NULL); | |
| 374 memset(sp, 0, sizeof(FTS)); | |
| 375 sp->fts_compar = compar; | |
| 376 sp->fts_options = options; | |
| 377 | |
| 378 /* Logical walks turn on NOCHDIR; symbolic links are too hard. */ | |
| 7151 | 379 if (ISSET(FTS_LOGICAL)) { |
| 5858 | 380 SET(FTS_NOCHDIR); |
| 7151 | 381 CLR(FTS_CWDFD); |
| 382 } | |
| 383 | |
| 384 /* Initialize fts_cwd_fd. */ | |
| 385 sp->fts_cwd_fd = AT_FDCWD; | |
| 386 if ( ISSET(FTS_CWDFD) && ! HAVE_OPENAT_SUPPORT) | |
| 387 { | |
| 388 /* While it isn't technically necessary to open "." this | |
| 389 early, doing it here saves us the trouble of ensuring | |
| 390 later (where it'd be messier) that "." can in fact | |
| 391 be opened. If not, revert to FTS_NOCHDIR mode. */ | |
| 392 int fd = open (".", O_RDONLY); | |
| 393 if (fd < 0) | |
| 394 { | |
| 395 /* Even if `.' is unreadable, don't revert to FTS_NOCHDIR mode | |
| 396 on systems like Linux+PROC_FS, where our openat emulation | |
| 397 is good enough. Note: on a system that emulates | |
| 398 openat via /proc, this technique can still fail, but | |
| 399 only in extreme conditions, e.g., when the working | |
| 400 directory cannot be saved (i.e. save_cwd fails) -- | |
|
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401 and that happens on Linux only when "." is unreadable |
| 7151 | 402 and the CWD would be longer than PATH_MAX. |
| 403 FIXME: once Linux kernel openat support is well established, | |
| 404 replace the above open call and this entire if/else block | |
| 405 with the body of the if-block below. */ | |
| 406 if ( openat_needs_fchdir ()) | |
| 407 { | |
| 408 SET(FTS_NOCHDIR); | |
| 409 CLR(FTS_CWDFD); | |
| 410 } | |
| 411 } | |
| 412 else | |
| 413 { | |
| 414 close (fd); | |
| 415 } | |
| 416 } | |
| 5858 | 417 |
| 418 /* | |
| 5907 | 419 * Start out with 1K of file name space, and enough, in any case, |
| 420 * to hold the user's file names. | |
| 5858 | 421 */ |
| 422 #ifndef MAXPATHLEN | |
| 423 # define MAXPATHLEN 1024 | |
| 424 #endif | |
|
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425 { |
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426 size_t maxarglen = fts_maxarglen(argv); |
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427 if (! fts_palloc(sp, MAX(maxarglen, MAXPATHLEN))) |
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428 goto mem1; |
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429 } |
| 5858 | 430 |
| 431 /* Allocate/initialize root's parent. */ | |
| 7151 | 432 if (*argv != NULL) { |
| 433 if ((parent = fts_alloc(sp, "", 0)) == NULL) | |
| 434 goto mem2; | |
| 435 parent->fts_level = FTS_ROOTPARENTLEVEL; | |
| 436 } | |
| 5858 | 437 |
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438 /* The classic fts implementation would call fts_stat with |
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439 a new entry for each iteration of the loop below. |
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440 If the comparison function is not specified or if the |
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441 FTS_DEFER_STAT option is in effect, don't stat any entry |
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442 in this loop. This is an attempt to minimize the interval |
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443 between the initial stat/lstat/fstatat and the point at which |
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444 a directory argument is first opened. This matters for any |
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445 directory command line argument that resides on a file system |
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446 without genuine i-nodes. If you specify FTS_DEFER_STAT along |
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changeset
|
447 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
|
448 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
|
449 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
|
450 |
| 5858 | 451 /* Allocate/initialize root(s). */ |
| 452 for (root = NULL, nitems = 0; *argv != NULL; ++argv, ++nitems) { | |
| 5907 | 453 /* Don't allow zero-length file names. */ |
| 5858 | 454 if ((len = strlen(*argv)) == 0) { |
| 455 __set_errno (ENOENT); | |
| 456 goto mem3; | |
| 457 } | |
| 458 | |
| 459 if ((p = fts_alloc(sp, *argv, len)) == NULL) | |
| 460 goto mem3; | |
| 461 p->fts_level = FTS_ROOTLEVEL; | |
| 462 p->fts_parent = parent; | |
| 463 p->fts_accpath = p->fts_name; | |
|
7499
67ce0bed0a20
Fix a bug in yesterday's change.
Jim Meyering <jim@meyering.net>
parents:
7483
diff
changeset
|
464 /* 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
|
465 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
|
466 FTS_XDEV) requires that. */ |
|
67ce0bed0a20
Fix a bug in yesterday's change.
Jim Meyering <jim@meyering.net>
parents:
7483
diff
changeset
|
467 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
|
468 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
|
469 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
|
470 } else { |
|
26914593f079
Big performance improvement for fts-based tools that use FTS_NOSTAT.
Jim Meyering <jim@meyering.net>
parents:
7408
diff
changeset
|
471 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
|
472 } |
| 5858 | 473 |
| 474 /* | |
| 475 * If comparison routine supplied, traverse in sorted | |
| 476 * order; otherwise traverse in the order specified. | |
| 477 */ | |
| 478 if (compar) { | |
| 479 p->fts_link = root; | |
| 480 root = p; | |
| 481 } else { | |
| 482 p->fts_link = NULL; | |
| 483 if (root == NULL) | |
| 484 tmp = root = p; | |
| 485 else { | |
| 486 tmp->fts_link = p; | |
| 487 tmp = p; | |
| 488 } | |
| 489 } | |
| 490 } | |
| 491 if (compar && nitems > 1) | |
| 492 root = fts_sort(sp, root, nitems); | |
| 493 | |
| 494 /* | |
| 495 * Allocate a dummy pointer and make fts_read think that we've just | |
| 496 * finished the node before the root(s); set p->fts_info to FTS_INIT | |
| 497 * so that everything about the "current" node is ignored. | |
| 498 */ | |
| 499 if ((sp->fts_cur = fts_alloc(sp, "", 0)) == NULL) | |
| 500 goto mem3; | |
| 501 sp->fts_cur->fts_link = root; | |
| 502 sp->fts_cur->fts_info = FTS_INIT; | |
| 5872 | 503 if (! setup_dir (sp)) |
|
7483
2433e5f6bfd0
* lib/fts.c (fts_open): Use consistent indentation.
Jim Meyering <jim@meyering.net>
parents:
7482
diff
changeset
|
504 goto mem3; |
| 5858 | 505 |
| 506 /* | |
| 507 * If using chdir(2), grab a file descriptor pointing to dot to ensure | |
| 5907 | 508 * that we can get back here; this could be avoided for some file names, |
| 5858 | 509 * but almost certainly not worth the effort. Slashes, symbolic links, |
| 510 * and ".." are all fairly nasty problems. Note, if we can't get the | |
| 511 * descriptor we run anyway, just more slowly. | |
| 512 */ | |
| 7151 | 513 if (!ISSET(FTS_NOCHDIR) && !ISSET(FTS_CWDFD) |
| 514 && (sp->fts_rfd = diropen (sp, ".")) < 0) | |
| 5858 | 515 SET(FTS_NOCHDIR); |
| 516 | |
|
7639
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
517 i_ring_init (&sp->fts_fd_ring, -1); |
| 5858 | 518 return (sp); |
| 519 | |
| 520 mem3: fts_lfree(root); | |
| 521 free(parent); | |
| 522 mem2: free(sp->fts_path); | |
| 523 mem1: free(sp); | |
| 524 return (NULL); | |
| 525 } | |
| 526 | |
| 527 static void | |
| 528 internal_function | |
| 529 fts_load (FTS *sp, register FTSENT *p) | |
| 530 { | |
| 531 register size_t len; | |
| 532 register char *cp; | |
| 533 | |
| 534 /* | |
| 535 * Load the stream structure for the next traversal. Since we don't | |
| 536 * actually enter the directory until after the preorder visit, set | |
| 537 * the fts_accpath field specially so the chdir gets done to the right | |
| 538 * place and the user can access the first node. From fts_open it's | |
| 5907 | 539 * known that the file name will fit. |
| 5858 | 540 */ |
| 541 len = p->fts_pathlen = p->fts_namelen; | |
| 542 memmove(sp->fts_path, p->fts_name, len + 1); | |
| 543 if ((cp = strrchr(p->fts_name, '/')) && (cp != p->fts_name || cp[1])) { | |
| 544 len = strlen(++cp); | |
| 545 memmove(p->fts_name, cp, len + 1); | |
| 546 p->fts_namelen = len; | |
| 547 } | |
| 548 p->fts_accpath = p->fts_path = sp->fts_path; | |
| 549 } | |
| 550 | |
| 551 int | |
| 552 fts_close (FTS *sp) | |
| 553 { | |
| 554 register FTSENT *freep, *p; | |
| 555 int saved_errno = 0; | |
| 556 | |
| 557 /* | |
| 558 * This still works if we haven't read anything -- the dummy structure | |
| 559 * points to the root list, so we step through to the end of the root | |
| 560 * list which has a valid parent pointer. | |
| 561 */ | |
| 562 if (sp->fts_cur) { | |
| 563 for (p = sp->fts_cur; p->fts_level >= FTS_ROOTLEVEL;) { | |
| 564 freep = p; | |
| 565 p = p->fts_link != NULL ? p->fts_link : p->fts_parent; | |
| 566 free(freep); | |
| 567 } | |
| 568 free(p); | |
| 569 } | |
| 570 | |
| 5907 | 571 /* Free up child linked list, sort array, file name buffer. */ |
| 5858 | 572 if (sp->fts_child) |
| 573 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
|
574 free(sp->fts_array); |
| 5858 | 575 free(sp->fts_path); |
| 576 | |
| 7151 | 577 if (ISSET(FTS_CWDFD)) |
| 578 { | |
| 579 if (0 <= sp->fts_cwd_fd) | |
| 580 close (sp->fts_cwd_fd); | |
| 581 } | |
| 582 else if (!ISSET(FTS_NOCHDIR)) | |
| 583 { | |
| 584 /* Return to original directory, save errno if necessary. */ | |
| 585 if (fchdir(sp->fts_rfd)) | |
| 586 saved_errno = errno; | |
| 587 close(sp->fts_rfd); | |
| 588 } | |
| 5858 | 589 |
|
7639
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
590 fd_ring_clear (&sp->fts_fd_ring); |
| 5872 | 591 free_dir (sp); |
| 5858 | 592 |
| 593 /* Free up the stream pointer. */ | |
| 594 free(sp); | |
| 595 | |
| 596 /* Set errno and return. */ | |
| 597 if (saved_errno) { | |
| 598 __set_errno (saved_errno); | |
| 599 return (-1); | |
| 600 } | |
| 601 | |
| 602 return (0); | |
| 603 } | |
| 604 | |
| 605 /* | |
| 5907 | 606 * Special case of "/" at the end of the file name so that slashes aren't |
| 607 * appended which would cause file names to be written as "....//foo". | |
| 5858 | 608 */ |
| 609 #define NAPPEND(p) \ | |
| 610 (p->fts_path[p->fts_pathlen - 1] == '/' \ | |
| 611 ? p->fts_pathlen - 1 : p->fts_pathlen) | |
| 612 | |
| 613 FTSENT * | |
| 614 fts_read (register FTS *sp) | |
| 615 { | |
| 616 register FTSENT *p, *tmp; | |
| 617 register unsigned short int instr; | |
| 618 register char *t; | |
| 619 | |
| 620 /* If finished or unrecoverable error, return NULL. */ | |
| 621 if (sp->fts_cur == NULL || ISSET(FTS_STOP)) | |
| 622 return (NULL); | |
| 623 | |
| 624 /* Set current node pointer. */ | |
| 625 p = sp->fts_cur; | |
| 626 | |
| 627 /* Save and zero out user instructions. */ | |
| 628 instr = p->fts_instr; | |
| 629 p->fts_instr = FTS_NOINSTR; | |
| 630 | |
| 631 /* Any type of file may be re-visited; re-stat and re-turn. */ | |
| 632 if (instr == FTS_AGAIN) { | |
| 633 p->fts_info = fts_stat(sp, p, false); | |
| 634 return (p); | |
| 635 } | |
| 636 Dprintf (("fts_read: p=%s\n", | |
| 637 p->fts_info == FTS_INIT ? "" : p->fts_path)); | |
| 638 | |
| 639 /* | |
| 640 * Following a symlink -- SLNONE test allows application to see | |
| 641 * SLNONE and recover. If indirecting through a symlink, have | |
| 642 * keep a pointer to current location. If unable to get that | |
| 643 * pointer, follow fails. | |
| 644 */ | |
| 645 if (instr == FTS_FOLLOW && | |
| 646 (p->fts_info == FTS_SL || p->fts_info == FTS_SLNONE)) { | |
| 647 p->fts_info = fts_stat(sp, p, true); | |
| 648 if (p->fts_info == FTS_D && !ISSET(FTS_NOCHDIR)) { | |
| 7151 | 649 if ((p->fts_symfd = diropen (sp, ".")) < 0) { |
| 5858 | 650 p->fts_errno = errno; |
| 651 p->fts_info = FTS_ERR; | |
| 652 } else | |
| 653 p->fts_flags |= FTS_SYMFOLLOW; | |
| 654 } | |
| 5872 | 655 goto check_for_dir; |
| 5858 | 656 } |
| 657 | |
| 658 /* Directory in pre-order. */ | |
| 659 if (p->fts_info == FTS_D) { | |
| 660 /* If skipped or crossed mount point, do post-order visit. */ | |
| 661 if (instr == FTS_SKIP || | |
| 662 (ISSET(FTS_XDEV) && p->fts_statp->st_dev != sp->fts_dev)) { | |
| 663 if (p->fts_flags & FTS_SYMFOLLOW) | |
| 664 (void)close(p->fts_symfd); | |
| 665 if (sp->fts_child) { | |
| 666 fts_lfree(sp->fts_child); | |
| 667 sp->fts_child = NULL; | |
| 668 } | |
| 669 p->fts_info = FTS_DP; | |
| 670 LEAVE_DIR (sp, p, "1"); | |
| 671 return (p); | |
| 672 } | |
| 673 | |
| 674 /* Rebuild if only read the names and now traversing. */ | |
| 675 if (sp->fts_child != NULL && ISSET(FTS_NAMEONLY)) { | |
| 676 CLR(FTS_NAMEONLY); | |
| 677 fts_lfree(sp->fts_child); | |
| 678 sp->fts_child = NULL; | |
| 679 } | |
| 680 | |
| 681 /* | |
| 682 * Cd to the subdirectory. | |
| 683 * | |
| 684 * If have already read and now fail to chdir, whack the list | |
| 685 * to make the names come out right, and set the parent errno | |
| 686 * so the application will eventually get an error condition. | |
| 687 * Set the FTS_DONTCHDIR flag so that when we logically change | |
| 688 * directories back to the parent we don't do a chdir. | |
| 689 * | |
| 690 * If haven't read do so. If the read fails, fts_build sets | |
| 691 * FTS_STOP or the fts_info field of the node. | |
| 692 */ | |
| 693 if (sp->fts_child != NULL) { | |
| 694 if (fts_safe_changedir(sp, p, -1, p->fts_accpath)) { | |
| 695 p->fts_errno = errno; | |
| 696 p->fts_flags |= FTS_DONTCHDIR; | |
| 697 for (p = sp->fts_child; p != NULL; | |
| 698 p = p->fts_link) | |
| 699 p->fts_accpath = | |
| 700 p->fts_parent->fts_accpath; | |
| 701 } | |
| 702 } else if ((sp->fts_child = fts_build(sp, BREAD)) == NULL) { | |
| 703 if (ISSET(FTS_STOP)) | |
| 704 return (NULL); | |
| 705 /* If fts_build's call to fts_safe_changedir failed | |
| 706 because it was not able to fchdir into a | |
| 707 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
|
708 if (p->fts_errno && p->fts_info != FTS_DNR) |
| 5858 | 709 p->fts_info = FTS_ERR; |
| 710 LEAVE_DIR (sp, p, "2"); | |
| 711 return (p); | |
| 712 } | |
| 713 p = sp->fts_child; | |
| 714 sp->fts_child = NULL; | |
| 715 goto name; | |
| 716 } | |
| 717 | |
| 718 /* Move to the next node on this level. */ | |
| 719 next: tmp = p; | |
| 720 if ((p = p->fts_link) != NULL) { | |
|
7853
9ddbddb3fc43
fts.c: a small readability/maintainability improvement
Jim Meyering <jim@meyering.net>
parents:
7797
diff
changeset
|
721 sp->fts_cur = p; |
| 5858 | 722 free(tmp); |
| 723 | |
| 724 /* | |
| 725 * If reached the top, return to the original directory (or | |
| 5907 | 726 * the root of the tree), and load the file names for the next |
| 727 * root. | |
| 5858 | 728 */ |
| 729 if (p->fts_level == FTS_ROOTLEVEL) { | |
| 7151 | 730 if (RESTORE_INITIAL_CWD(sp)) { |
| 5858 | 731 SET(FTS_STOP); |
| 732 return (NULL); | |
| 733 } | |
| 734 fts_load(sp, p); | |
| 5872 | 735 goto check_for_dir; |
| 5858 | 736 } |
| 737 | |
| 738 /* | |
| 739 * User may have called fts_set on the node. If skipped, | |
| 740 * ignore. If followed, get a file descriptor so we can | |
| 741 * get back if necessary. | |
| 742 */ | |
| 743 if (p->fts_instr == FTS_SKIP) | |
| 744 goto next; | |
| 745 if (p->fts_instr == FTS_FOLLOW) { | |
| 746 p->fts_info = fts_stat(sp, p, true); | |
| 747 if (p->fts_info == FTS_D && !ISSET(FTS_NOCHDIR)) { | |
| 7151 | 748 if ((p->fts_symfd = diropen (sp, ".")) < 0) { |
| 5858 | 749 p->fts_errno = errno; |
| 750 p->fts_info = FTS_ERR; | |
| 751 } else | |
| 752 p->fts_flags |= FTS_SYMFOLLOW; | |
| 753 } | |
| 754 p->fts_instr = FTS_NOINSTR; | |
| 755 } | |
| 756 | |
| 757 name: t = sp->fts_path + NAPPEND(p->fts_parent); | |
| 758 *t++ = '/'; | |
| 759 memmove(t, p->fts_name, p->fts_namelen + 1); | |
| 5872 | 760 check_for_dir: |
|
7853
9ddbddb3fc43
fts.c: a small readability/maintainability improvement
Jim Meyering <jim@meyering.net>
parents:
7797
diff
changeset
|
761 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
|
762 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
|
763 { |
|
7786
f79f76e0b6f7
Use a more robust test for a "can't happen" condition.
Jim Meyering <jim@meyering.net>
parents:
7785
diff
changeset
|
764 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
|
765 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
|
766 else |
|
f79f76e0b6f7
Use a more robust test for a "can't happen" condition.
Jim Meyering <jim@meyering.net>
parents:
7785
diff
changeset
|
767 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
|
768 } |
|
7707
3f57a32346a2
* lib/fts.c (fts_load): Don't set sp->fts_dev here, since
Jim Meyering <jim@meyering.net>
parents:
7684
diff
changeset
|
769 |
| 5858 | 770 if (p->fts_info == FTS_D) |
| 5872 | 771 { |
|
7707
3f57a32346a2
* lib/fts.c (fts_load): Don't set sp->fts_dev here, since
Jim Meyering <jim@meyering.net>
parents:
7684
diff
changeset
|
772 /* 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
|
773 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
|
774 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
|
775 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
|
776 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
|
777 Dprintf ((" entering: %s\n", p->fts_path)); |
| 5872 | 778 if (! enter_dir (sp, p)) |
| 779 { | |
| 780 __set_errno (ENOMEM); | |
| 781 return NULL; | |
| 782 } | |
| 783 } | |
| 784 return p; | |
| 5858 | 785 } |
| 786 | |
| 787 /* Move up to the parent node. */ | |
| 788 p = tmp->fts_parent; | |
|
7853
9ddbddb3fc43
fts.c: a small readability/maintainability improvement
Jim Meyering <jim@meyering.net>
parents:
7797
diff
changeset
|
789 sp->fts_cur = p; |
| 5858 | 790 free(tmp); |
| 791 | |
| 792 if (p->fts_level == FTS_ROOTPARENTLEVEL) { | |
| 793 /* | |
| 794 * Done; free everything up and set errno to 0 so the user | |
| 795 * can distinguish between error and EOF. | |
| 796 */ | |
| 797 free(p); | |
| 798 __set_errno (0); | |
| 799 return (sp->fts_cur = NULL); | |
| 800 } | |
| 801 | |
|
7785
3246679850d5
Slight readability improvement: use an assert-like macro
Jim Meyering <jim@meyering.net>
parents:
7707
diff
changeset
|
802 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
|
803 |
| 5907 | 804 /* NUL terminate the file name. */ |
| 5858 | 805 sp->fts_path[p->fts_pathlen] = '\0'; |
| 806 | |
| 807 /* | |
| 7151 | 808 * Return to the parent directory. If at a root node, restore |
| 809 * the initial working directory. If we came through a symlink, | |
| 810 * go back through the file descriptor. Otherwise, move up | |
| 811 * one level, via "..". | |
| 5858 | 812 */ |
| 813 if (p->fts_level == FTS_ROOTLEVEL) { | |
| 7151 | 814 if (RESTORE_INITIAL_CWD(sp)) { |
| 5858 | 815 p->fts_errno = errno; |
| 816 SET(FTS_STOP); | |
| 817 } | |
| 818 } else if (p->fts_flags & FTS_SYMFOLLOW) { | |
| 819 if (FCHDIR(sp, p->fts_symfd)) { | |
| 7151 | 820 int saved_errno = errno; |
| 5858 | 821 (void)close(p->fts_symfd); |
| 822 __set_errno (saved_errno); | |
| 823 p->fts_errno = errno; | |
| 824 SET(FTS_STOP); | |
| 825 } | |
| 826 (void)close(p->fts_symfd); | |
| 827 } else if (!(p->fts_flags & FTS_DONTCHDIR) && | |
| 828 fts_safe_changedir(sp, p->fts_parent, -1, "..")) { | |
| 829 p->fts_errno = errno; | |
| 830 SET(FTS_STOP); | |
| 831 } | |
| 832 p->fts_info = p->fts_errno ? FTS_ERR : FTS_DP; | |
| 833 if (p->fts_errno == 0) | |
| 834 LEAVE_DIR (sp, p, "3"); | |
| 835 return ISSET(FTS_STOP) ? NULL : p; | |
| 836 } | |
| 837 | |
| 838 /* | |
| 839 * Fts_set takes the stream as an argument although it's not used in this | |
| 840 * implementation; it would be necessary if anyone wanted to add global | |
| 841 * semantics to fts using fts_set. An error return is allowed for similar | |
| 842 * reasons. | |
| 843 */ | |
| 844 /* ARGSUSED */ | |
| 845 int | |
| 846 fts_set(FTS *sp ATTRIBUTE_UNUSED, FTSENT *p, int instr) | |
| 847 { | |
| 848 if (instr != 0 && instr != FTS_AGAIN && instr != FTS_FOLLOW && | |
| 849 instr != FTS_NOINSTR && instr != FTS_SKIP) { | |
| 850 __set_errno (EINVAL); | |
| 851 return (1); | |
| 852 } | |
| 853 p->fts_instr = instr; | |
| 854 return (0); | |
| 855 } | |
| 856 | |
| 857 FTSENT * | |
| 858 fts_children (register FTS *sp, int instr) | |
| 859 { | |
| 860 register FTSENT *p; | |
| 861 int fd; | |
| 862 | |
| 863 if (instr != 0 && instr != FTS_NAMEONLY) { | |
| 864 __set_errno (EINVAL); | |
| 865 return (NULL); | |
| 866 } | |
| 867 | |
| 868 /* Set current node pointer. */ | |
| 869 p = sp->fts_cur; | |
| 870 | |
| 871 /* | |
| 872 * Errno set to 0 so user can distinguish empty directory from | |
| 873 * an error. | |
| 874 */ | |
| 875 __set_errno (0); | |
| 876 | |
| 877 /* Fatal errors stop here. */ | |
| 878 if (ISSET(FTS_STOP)) | |
| 879 return (NULL); | |
| 880 | |
| 881 /* Return logical hierarchy of user's arguments. */ | |
| 882 if (p->fts_info == FTS_INIT) | |
| 883 return (p->fts_link); | |
| 884 | |
| 885 /* | |
| 886 * If not a directory being visited in pre-order, stop here. Could | |
| 887 * allow FTS_DNR, assuming the user has fixed the problem, but the | |
| 888 * same effect is available with FTS_AGAIN. | |
| 889 */ | |
| 890 if (p->fts_info != FTS_D /* && p->fts_info != FTS_DNR */) | |
| 891 return (NULL); | |
| 892 | |
| 893 /* Free up any previous child list. */ | |
| 894 if (sp->fts_child != NULL) | |
| 895 fts_lfree(sp->fts_child); | |
| 896 | |
| 897 if (instr == FTS_NAMEONLY) { | |
| 898 SET(FTS_NAMEONLY); | |
| 899 instr = BNAMES; | |
| 900 } else | |
| 901 instr = BCHILD; | |
| 902 | |
| 903 /* | |
| 5907 | 904 * If using chdir on a relative file name and called BEFORE fts_read |
| 905 * does its chdir to the root of a traversal, we can lose -- we need to | |
| 5858 | 906 * chdir into the subdirectory, and we don't know where the current |
| 907 * directory is, so we can't get back so that the upcoming chdir by | |
| 908 * fts_read will work. | |
| 909 */ | |
| 910 if (p->fts_level != FTS_ROOTLEVEL || p->fts_accpath[0] == '/' || | |
| 911 ISSET(FTS_NOCHDIR)) | |
| 912 return (sp->fts_child = fts_build(sp, instr)); | |
| 913 | |
| 7151 | 914 if ((fd = diropen (sp, ".")) < 0) |
| 5858 | 915 return (sp->fts_child = NULL); |
| 916 sp->fts_child = fts_build(sp, instr); | |
| 7151 | 917 if (ISSET(FTS_CWDFD)) |
| 918 { | |
|
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919 cwd_advance_fd (sp, fd, true); |
| 7151 | 920 } |
| 921 else | |
| 922 { | |
| 923 if (fchdir(fd)) | |
| 924 { | |
|
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925 int saved_errno = errno; |
| 7151 | 926 close (fd); |
|
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927 __set_errno (saved_errno); |
| 7151 | 928 return NULL; |
| 929 } | |
| 930 close (fd); | |
| 931 } | |
| 5858 | 932 return (sp->fts_child); |
| 933 } | |
| 934 | |
|
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935 #if defined __linux__ \ |
|
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936 && HAVE_SYS_VFS_H && HAVE_FSTATFS && HAVE_STRUCT_STATFS_F_TYPE |
|
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937 |
|
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938 #include <sys/vfs.h> |
|
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939 |
|
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940 /* Linux-specific constants from coreutils' src/fs.h */ |
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941 # define S_MAGIC_TMPFS 0x1021994 |
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942 # define S_MAGIC_NFS 0x6969 |
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943 |
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944 /* Return false if it is easy to determine the file system type of |
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945 the directory on which DIR_FD is open, and sorting dirents on |
|
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946 inode numbers is known not to improve traversal performance with |
|
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947 that type of file system. Otherwise, return true. */ |
|
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948 static bool |
|
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949 dirent_inode_sort_may_be_useful (int dir_fd) |
|
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950 { |
|
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951 /* Skip the sort only if we can determine efficiently |
|
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952 that skipping it is the right thing to do. |
|
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953 The cost of performing an unnecessary sort is negligible, |
|
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954 while the cost of *not* performing it can be O(N^2) with |
|
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955 a very large constant. */ |
|
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956 struct statfs fs_buf; |
|
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957 |
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958 /* If fstatfs fails, assume sorting would be useful. */ |
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959 if (fstatfs (dir_fd, &fs_buf) != 0) |
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960 return true; |
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961 |
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962 /* FIXME: what about when f_type is not an integral type? |
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963 deal with that if/when it's encountered. */ |
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964 switch (fs_buf.f_type) |
|
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965 { |
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966 case S_MAGIC_TMPFS: |
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967 case S_MAGIC_NFS: |
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968 /* On a file system of any of these types, sorting |
|
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969 is unnecessary, and hence wasteful. */ |
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970 return false; |
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971 |
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972 default: |
|
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973 return true; |
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974 } |
|
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975 } |
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976 #else |
|
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977 static bool dirent_inode_sort_may_be_useful (int dir_fd) { return true; } |
|
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978 #endif |
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979 |
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980 /* A comparison function to sort on increasing inode number. |
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981 For some file system types, sorting either way makes a huge |
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982 performance difference for a directory with very many entries, |
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983 but sorting on increasing values is slightly better than sorting |
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984 on decreasing values. The difference is in the 5% range. */ |
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985 static int |
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986 fts_compare_ino (struct _ftsent const **a, struct _ftsent const **b) |
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987 { |
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988 return (a[0]->fts_statp->st_ino < b[0]->fts_statp->st_ino ? -1 |
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989 : b[0]->fts_statp->st_ino < a[0]->fts_statp->st_ino ? 1 : 0); |
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990 } |
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991 |
| 5858 | 992 /* |
| 993 * This is the tricky part -- do not casually change *anything* in here. The | |
| 994 * idea is to build the linked list of entries that are used by fts_children | |
| 995 * and fts_read. There are lots of special cases. | |
| 996 * | |
| 997 * The real slowdown in walking the tree is the stat calls. If FTS_NOSTAT is | |
| 998 * set and it's a physical walk (so that symbolic links can't be directories), | |
| 999 * we can do things quickly. First, if it's a 4.4BSD file system, the type | |
| 1000 * of the file is in the directory entry. Otherwise, we assume that the number | |
| 1001 * of subdirectories in a node is equal to the number of links to the parent. | |
| 1002 * The former skips all stat calls. The latter skips stat calls in any leaf | |
| 1003 * directories and for any files after the subdirectories in the directory have | |
| 1004 * been found, cutting the stat calls by about 2/3. | |
| 1005 */ | |
| 1006 static FTSENT * | |
| 1007 internal_function | |
| 1008 fts_build (register FTS *sp, int type) | |
| 1009 { | |
| 1010 register struct dirent *dp; | |
| 1011 register FTSENT *p, *head; | |
| 1012 register size_t nitems; | |
| 1013 FTSENT *cur, *tail; | |
| 1014 DIR *dirp; | |
| 1015 void *oldaddr; | |
| 1016 int saved_errno; | |
| 1017 bool descend; | |
| 1018 bool doadjust; | |
| 1019 ptrdiff_t level; | |
| 1020 nlink_t nlinks; | |
| 1021 bool nostat; | |
| 1022 size_t len, maxlen, new_len; | |
| 1023 char *cp; | |
| 1024 | |
| 1025 /* Set current node pointer. */ | |
| 1026 cur = sp->fts_cur; | |
| 1027 | |
| 1028 /* | |
| 1029 * Open the directory for reading. If this fails, we're done. | |
| 1030 * If being called from fts_read, set the fts_info field. | |
| 1031 */ | |
| 1032 #if defined FTS_WHITEOUT && 0 | |
| 1033 if (ISSET(FTS_WHITEOUT)) | |
| 1034 oflag = DTF_NODUP|DTF_REWIND; | |
| 1035 else | |
| 1036 oflag = DTF_HIDEW|DTF_NODUP|DTF_REWIND; | |
| 1037 #else | |
| 7151 | 1038 # define __opendir2(file, flag) \ |
| 1039 ( ! ISSET(FTS_NOCHDIR) && ISSET(FTS_CWDFD) \ | |
| 1040 ? opendirat(sp->fts_cwd_fd, file) \ | |
| 1041 : opendir(file)) | |
| 5858 | 1042 #endif |
| 1043 if ((dirp = __opendir2(cur->fts_accpath, oflag)) == NULL) { | |
| 1044 if (type == BREAD) { | |
| 1045 cur->fts_info = FTS_DNR; | |
| 1046 cur->fts_errno = errno; | |
| 1047 } | |
| 1048 return (NULL); | |
| 1049 } | |
|
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1050 /* Rather than calling fts_stat for each and every entry encountered |
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1051 in the readdir loop (below), stat each directory only right after |
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1052 opening it. */ |
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1053 if (cur->fts_info == FTS_NSOK) |
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1054 cur->fts_info = fts_stat(sp, cur, false); |
| 5858 | 1055 |
| 1056 /* | |
| 1057 * Nlinks is the number of possible entries of type directory in the | |
| 1058 * directory if we're cheating on stat calls, 0 if we're not doing | |
| 1059 * any stat calls at all, (nlink_t) -1 if we're statting everything. | |
| 1060 */ | |
| 1061 if (type == BNAMES) { | |
| 1062 nlinks = 0; | |
| 1063 /* Be quiet about nostat, GCC. */ | |
| 1064 nostat = false; | |
| 1065 } else if (ISSET(FTS_NOSTAT) && ISSET(FTS_PHYSICAL)) { | |
| 1066 nlinks = (cur->fts_statp->st_nlink | |
| 1067 - (ISSET(FTS_SEEDOT) ? 0 : 2)); | |
| 1068 nostat = true; | |
| 1069 } else { | |
| 1070 nlinks = -1; | |
| 1071 nostat = false; | |
| 1072 } | |
| 1073 | |
| 1074 /* | |
| 1075 * If we're going to need to stat anything or we want to descend | |
| 1076 * and stay in the directory, chdir. If this fails we keep going, | |
| 1077 * but set a flag so we don't chdir after the post-order visit. | |
| 1078 * We won't be able to stat anything, but we can still return the | |
| 1079 * names themselves. Note, that since fts_read won't be able to | |
| 5907 | 1080 * chdir into the directory, it will have to return different file |
| 5858 | 1081 * names than before, i.e. "a/b" instead of "b". Since the node |
| 1082 * has already been visited in pre-order, have to wait until the | |
| 1083 * post-order visit to return the error. There is a special case | |
| 1084 * here, if there was nothing to stat then it's not an error to | |
| 1085 * not be able to stat. This is all fairly nasty. If a program | |
| 1086 * needed sorted entries or stat information, they had better be | |
| 1087 * checking FTS_NS on the returned nodes. | |
| 1088 */ | |
| 1089 if (nlinks || type == BREAD) { | |
| 7151 | 1090 int dir_fd = dirfd(dirp); |
| 1091 if (ISSET(FTS_CWDFD) && 0 <= dir_fd) | |
| 1092 dir_fd = dup (dir_fd); | |
| 1093 if (dir_fd < 0 || fts_safe_changedir(sp, cur, dir_fd, NULL)) { | |
| 5858 | 1094 if (nlinks && type == BREAD) |
| 1095 cur->fts_errno = errno; | |
| 1096 cur->fts_flags |= FTS_DONTCHDIR; | |
| 1097 descend = false; | |
|
5867
67b499052f7f
* fts.c: Include fts_.h first, to check interface.
Paul Eggert <eggert@cs.ucla.edu>
parents:
5858
diff
changeset
|
1098 closedir(dirp); |
| 7151 | 1099 if (ISSET(FTS_CWDFD) && 0 <= dir_fd) |
| 1100 close (dir_fd); | |
| 5858 | 1101 dirp = NULL; |
| 1102 } else | |
| 1103 descend = true; | |
| 1104 } else | |
| 1105 descend = false; | |
| 1106 | |
| 1107 /* | |
| 1108 * Figure out the max file name length that can be stored in the | |
| 5907 | 1109 * current buffer -- the inner loop allocates more space as necessary. |
| 5858 | 1110 * We really wouldn't have to do the maxlen calculations here, we |
| 5907 | 1111 * could do them in fts_read before returning the name, but it's a |
| 5858 | 1112 * lot easier here since the length is part of the dirent structure. |
| 1113 * | |
| 1114 * If not changing directories set a pointer so that can just append | |
| 5907 | 1115 * each new component into the file name. |
| 5858 | 1116 */ |
| 1117 len = NAPPEND(cur); | |
| 1118 if (ISSET(FTS_NOCHDIR)) { | |
| 1119 cp = sp->fts_path + len; | |
| 1120 *cp++ = '/'; | |
| 1121 } else { | |
| 1122 /* GCC, you're too verbose. */ | |
| 1123 cp = NULL; | |
| 1124 } | |
| 1125 len++; | |
| 1126 maxlen = sp->fts_pathlen - len; | |
| 1127 | |
| 1128 level = cur->fts_level + 1; | |
| 1129 | |
| 1130 /* Read the directory, attaching each entry to the `link' pointer. */ | |
| 1131 doadjust = false; | |
| 1132 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
|
1133 bool is_dir; |
|
0da62e3fa6c7
(fts_build): Move variable declaration, for C89 compliance.
Bruno Haible <bruno@clisp.org>
parents:
7499
diff
changeset
|
1134 |
| 5858 | 1135 if (!ISSET(FTS_SEEDOT) && ISDOT(dp->d_name)) |
| 1136 continue; | |
| 1137 | |
|
6949
96af1224c6fa
* backupfile.c, dirfd.h, fts.c, getcwd.c, glob.c, glob_.h:
Paul Eggert <eggert@cs.ucla.edu>
parents:
6934
diff
changeset
|
1138 if ((p = fts_alloc (sp, dp->d_name, |
|
96af1224c6fa
* backupfile.c, dirfd.h, fts.c, getcwd.c, glob.c, glob_.h:
Paul Eggert <eggert@cs.ucla.edu>
parents:
6934
diff
changeset
|
1139 _D_EXACT_NAMLEN (dp))) == NULL) |
| 5858 | 1140 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
|
1141 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
|
1142 /* include space for NUL */ |
| 5858 | 1143 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
|
1144 if (! fts_palloc(sp, _D_EXACT_NAMLEN (dp) + len + 1)) { |
| 5858 | 1145 /* |
| 5907 | 1146 * No more memory. Save |
| 5858 | 1147 * errno, free up the current structure and the |
| 1148 * structures already allocated. | |
| 1149 */ | |
| 1150 mem1: saved_errno = errno; | |
|
7396
6f79ccad009d
2006-10-02 Dmitry V. Levin <ldv@altlinux.org>
Jim Meyering <jim@meyering.net>
parents:
7302
diff
changeset
|
1151 free(p); |
| 5858 | 1152 fts_lfree(head); |
|
5867
67b499052f7f
* fts.c: Include fts_.h first, to check interface.
Paul Eggert <eggert@cs.ucla.edu>
parents:
5858
diff
changeset
|
1153 closedir(dirp); |
| 5858 | 1154 cur->fts_info = FTS_ERR; |
| 1155 SET(FTS_STOP); | |
| 1156 __set_errno (saved_errno); | |
| 1157 return (NULL); | |
| 1158 } | |
| 1159 /* Did realloc() change the pointer? */ | |
| 1160 if (oldaddr != sp->fts_path) { | |
| 1161 doadjust = true; | |
| 1162 if (ISSET(FTS_NOCHDIR)) | |
| 1163 cp = sp->fts_path + len; | |
| 1164 } | |
| 1165 maxlen = sp->fts_pathlen - len; | |
| 1166 } | |
| 1167 | |
|
6949
96af1224c6fa
* backupfile.c, dirfd.h, fts.c, getcwd.c, glob.c, glob_.h:
Paul Eggert <eggert@cs.ucla.edu>
parents:
6934
diff
changeset
|
1168 new_len = len + _D_EXACT_NAMLEN (dp); |
| 5858 | 1169 if (new_len < len) { |
| 1170 /* | |
|
9718
5954dae30c7f
* lib/fts.c (fts_build): Typo correction to comment.
Martin Buchholz <martin@xemacs.org>
parents:
9613
diff
changeset
|
1171 * In the unlikely event that we would end up |
| 5907 | 1172 * with a file name longer than SIZE_MAX, free up |
| 5858 | 1173 * the current structure and the structures already |
| 1174 * allocated, then error out with ENAMETOOLONG. | |
| 1175 */ | |
| 1176 free(p); | |
| 1177 fts_lfree(head); | |
|
5867
67b499052f7f
* fts.c: Include fts_.h first, to check interface.
Paul Eggert <eggert@cs.ucla.edu>
parents:
5858
diff
changeset
|
1178 closedir(dirp); |
| 5858 | 1179 cur->fts_info = FTS_ERR; |
| 1180 SET(FTS_STOP); | |
| 1181 __set_errno (ENAMETOOLONG); | |
| 1182 return (NULL); | |
| 1183 } | |
| 1184 p->fts_level = level; | |
| 1185 p->fts_parent = sp->fts_cur; | |
| 1186 p->fts_pathlen = new_len; | |
| 1187 | |
| 1188 #if defined FTS_WHITEOUT && 0 | |
| 1189 if (dp->d_type == DT_WHT) | |
| 1190 p->fts_flags |= FTS_ISW; | |
| 1191 #endif | |
|
10481
47fe4e48e158
fts: sort dirent entries on inode number before traversing
Jim Meyering <meyering@redhat.com>
parents:
9718
diff
changeset
|
1192 /* 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
|
1193 entries before processing them. */ |
|
47fe4e48e158
fts: sort dirent entries on inode number before traversing
Jim Meyering <meyering@redhat.com>
parents:
9718
diff
changeset
|
1194 p->fts_statp->st_ino = D_INO (dp); |
| 5858 | 1195 |
| 7151 | 1196 /* Build a file name for fts_stat to stat. */ |
| 1197 if (ISSET(FTS_NOCHDIR)) { | |
| 1198 p->fts_accpath = p->fts_path; | |
| 1199 memmove(cp, p->fts_name, p->fts_namelen + 1); | |
| 1200 } else | |
| 1201 p->fts_accpath = p->fts_name; | |
|
7482
26914593f079
Big performance improvement for fts-based tools that use FTS_NOSTAT.
Jim Meyering <jim@meyering.net>
parents:
7408
diff
changeset
|
1202 |
|
26914593f079
Big performance improvement for fts-based tools that use FTS_NOSTAT.
Jim Meyering <jim@meyering.net>
parents:
7408
diff
changeset
|
1203 if (sp->fts_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
|
1204 /* 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
|
1205 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
|
1206 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
|
1207 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
|
1208 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
|
1209 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
|
1210 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
|
1211 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
|
1212 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
|
1213 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
|
1214 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
|
1215 be valid. */ |
|
26914593f079
Big performance improvement for fts-based tools that use FTS_NOSTAT.
Jim Meyering <jim@meyering.net>
parents:
7408
diff
changeset
|
1216 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
|
1217 && ISSET(FTS_NOSTAT) |
|
26914593f079
Big performance improvement for fts-based tools that use FTS_NOSTAT.
Jim Meyering <jim@meyering.net>
parents:
7408
diff
changeset
|
1218 && 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
|
1219 && ! 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
|
1220 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
|
1221 fts_set_stat_required(p, !skip_stat); |
|
26914593f079
Big performance improvement for fts-based tools that use FTS_NOSTAT.
Jim Meyering <jim@meyering.net>
parents:
7408
diff
changeset
|
1222 is_dir = (ISSET(FTS_PHYSICAL) && ISSET(FTS_NOSTAT) |
|
26914593f079
Big performance improvement for fts-based tools that use FTS_NOSTAT.
Jim Meyering <jim@meyering.net>
parents:
7408
diff
changeset
|
1223 && 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
|
1224 } else { |
|
26914593f079
Big performance improvement for fts-based tools that use FTS_NOSTAT.
Jim Meyering <jim@meyering.net>
parents:
7408
diff
changeset
|
1225 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
|
1226 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
|
1227 || 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
|
1228 || 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
|
1229 } |
| 5858 | 1230 |
| 7151 | 1231 /* 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
|
1232 if (nlinks > 0 && is_dir) |
| 7151 | 1233 nlinks -= nostat; |
| 5858 | 1234 |
| 1235 /* We walk in directory order so "ls -f" doesn't get upset. */ | |
| 1236 p->fts_link = NULL; | |
| 1237 if (head == NULL) | |
| 1238 head = tail = p; | |
| 1239 else { | |
| 1240 tail->fts_link = p; | |
| 1241 tail = p; | |
| 1242 } | |
| 1243 ++nitems; | |
| 1244 } | |
| 1245 if (dirp) | |
|
5867
67b499052f7f
* fts.c: Include fts_.h first, to check interface.
Paul Eggert <eggert@cs.ucla.edu>
parents:
5858
diff
changeset
|
1246 closedir(dirp); |
| 5858 | 1247 |
| 1248 /* | |
| 5907 | 1249 * If realloc() changed the address of the file name, adjust the |
| 5858 | 1250 * addresses for the rest of the tree and the dir list. |
| 1251 */ | |
| 1252 if (doadjust) | |
| 1253 fts_padjust(sp, head); | |
| 1254 | |
| 1255 /* | |
| 5907 | 1256 * If not changing directories, reset the file name back to original |
| 5858 | 1257 * state. |
| 1258 */ | |
| 1259 if (ISSET(FTS_NOCHDIR)) { | |
| 1260 if (len == sp->fts_pathlen || nitems == 0) | |
| 1261 --cp; | |
| 1262 *cp = '\0'; | |
| 1263 } | |
| 1264 | |
| 1265 /* | |
| 1266 * If descended after called from fts_children or after called from | |
| 1267 * fts_read and nothing found, get back. At the root level we use | |
| 5907 | 1268 * the saved fd; if one of fts_open()'s arguments is a relative name |
| 5858 | 1269 * to an empty directory, we wind up here with no other way back. If |
| 1270 * can't get back, we're done. | |
| 1271 */ | |
| 1272 if (descend && (type == BCHILD || !nitems) && | |
| 7151 | 1273 (cur->fts_level == FTS_ROOTLEVEL |
| 1274 ? RESTORE_INITIAL_CWD(sp) | |
| 1275 : fts_safe_changedir(sp, cur->fts_parent, -1, ".."))) { | |
| 5858 | 1276 cur->fts_info = FTS_ERR; |
| 1277 SET(FTS_STOP); | |
| 7151 | 1278 fts_lfree(head); |
| 5858 | 1279 return (NULL); |
| 1280 } | |
| 1281 | |
| 1282 /* If didn't find anything, return NULL. */ | |
| 1283 if (!nitems) { | |
| 1284 if (type == BREAD) | |
| 1285 cur->fts_info = FTS_DP; | |
| 7151 | 1286 fts_lfree(head); |
| 5858 | 1287 return (NULL); |
| 1288 } | |
| 1289 | |
|
10481
47fe4e48e158
fts: sort dirent entries on inode number before traversing
Jim Meyering <meyering@redhat.com>
parents:
9718
diff
changeset
|
1290 /* 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
|
1291 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
|
1292 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
|
1293 inode numbers. */ |
|
47fe4e48e158
fts: sort dirent entries on inode number before traversing
Jim Meyering <meyering@redhat.com>
parents:
9718
diff
changeset
|
1294 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
|
1295 && !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
|
1296 && ISSET (FTS_CWDFD) |
|
5e359fc738d5
fts.c: adjust a new interface to be more generally useful
Jim Meyering <meyering@redhat.com>
parents:
10482
diff
changeset
|
1297 && 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
|
1298 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
|
1299 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
|
1300 sp->fts_compar = NULL; |
|
47fe4e48e158
fts: sort dirent entries on inode number before traversing
Jim Meyering <meyering@redhat.com>
parents:
9718
diff
changeset
|
1301 } |
|
47fe4e48e158
fts: sort dirent entries on inode number before traversing
Jim Meyering <meyering@redhat.com>
parents:
9718
diff
changeset
|
1302 |
| 5858 | 1303 /* Sort the entries. */ |
| 1304 if (sp->fts_compar && nitems > 1) | |
| 1305 head = fts_sort(sp, head, nitems); | |
| 1306 return (head); | |
| 1307 } | |
| 1308 | |
| 1309 #if FTS_DEBUG | |
| 1310 | |
| 1311 /* Walk ->fts_parent links starting at E_CURR, until the root of the | |
| 1312 current hierarchy. There should be a directory with dev/inode | |
| 1313 matching those of AD. If not, print a lot of diagnostics. */ | |
| 1314 static void | |
| 1315 find_matching_ancestor (FTSENT const *e_curr, struct Active_dir const *ad) | |
| 1316 { | |
| 1317 FTSENT const *ent; | |
| 1318 for (ent = e_curr; ent->fts_level >= FTS_ROOTLEVEL; ent = ent->fts_parent) | |
| 1319 { | |
| 1320 if (ad->ino == ent->fts_statp->st_ino | |
| 1321 && ad->dev == ent->fts_statp->st_dev) | |
| 1322 return; | |
| 1323 } | |
| 1324 printf ("ERROR: tree dir, %s, not active\n", ad->fts_ent->fts_accpath); | |
| 1325 printf ("active dirs:\n"); | |
| 1326 for (ent = e_curr; | |
| 1327 ent->fts_level >= FTS_ROOTLEVEL; ent = ent->fts_parent) | |
| 1328 printf (" %s(%"PRIuMAX"/%"PRIuMAX") to %s(%"PRIuMAX"/%"PRIuMAX")...\n", | |
| 1329 ad->fts_ent->fts_accpath, | |
| 1330 (uintmax_t) ad->dev, | |
| 1331 (uintmax_t) ad->ino, | |
| 1332 ent->fts_accpath, | |
| 1333 (uintmax_t) ent->fts_statp->st_dev, | |
| 1334 (uintmax_t) ent->fts_statp->st_ino); | |
| 1335 } | |
| 1336 | |
| 1337 void | |
| 1338 fts_cross_check (FTS const *sp) | |
| 1339 { | |
| 1340 FTSENT const *ent = sp->fts_cur; | |
| 1341 FTSENT const *t; | |
| 1342 if ( ! ISSET (FTS_TIGHT_CYCLE_CHECK)) | |
| 1343 return; | |
| 1344 | |
| 1345 Dprintf (("fts-cross-check cur=%s\n", ent->fts_path)); | |
| 1346 /* Make sure every parent dir is in the tree. */ | |
| 1347 for (t = ent->fts_parent; t->fts_level >= FTS_ROOTLEVEL; t = t->fts_parent) | |
| 1348 { | |
| 1349 struct Active_dir ad; | |
| 1350 ad.ino = t->fts_statp->st_ino; | |
| 1351 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
|
1352 if ( ! hash_lookup (sp->fts_cycle.ht, &ad)) |
| 5858 | 1353 printf ("ERROR: active dir, %s, not in tree\n", t->fts_path); |
| 1354 } | |
| 1355 | |
| 1356 /* Make sure every dir in the tree is an active dir. | |
| 1357 But ENT is not necessarily a directory. If so, just skip this part. */ | |
| 1358 if (ent->fts_parent->fts_level >= FTS_ROOTLEVEL | |
| 1359 && (ent->fts_info == FTS_DP | |
| 1360 || ent->fts_info == FTS_D)) | |
| 1361 { | |
| 1362 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
|
1363 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
|
1364 ad = hash_get_next (sp->fts_cycle.ht, ad)) |
| 5858 | 1365 { |
| 1366 find_matching_ancestor (ent, ad); | |
| 1367 } | |
| 1368 } | |
| 1369 } | |
|
7639
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Make fts (in FTS_CWDFD mode) more efficient by caching a few open
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|
1370 |
|
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Make fts (in FTS_CWDFD mode) more efficient by caching a few open
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|
1371 static bool |
|
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Make fts (in FTS_CWDFD mode) more efficient by caching a few open
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|
1372 same_fd (int fd1, int fd2) |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
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|
1373 { |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
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diff
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|
1374 struct stat sb1, sb2; |
|
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
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|
1375 return (fstat (fd1, &sb1) == 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
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|
1376 && fstat (fd2, &sb2) == 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
|
1377 && SAME_INODE (sb1, sb2)); |
|
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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|
1378 } |
|
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
|
1379 |
|
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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|
1380 static void |
|
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
|
1381 fd_ring_print (FTS const *sp, FILE *stream, char const *msg) |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
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diff
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|
1382 { |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
1383 I_ring const *fd_ring = &sp->fts_fd_ring; |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
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diff
changeset
|
1384 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>
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diff
changeset
|
1385 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>
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diff
changeset
|
1386 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
|
1387 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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diff
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|
1388 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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7635
diff
changeset
|
1389 return; |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
1390 |
|
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
|
1391 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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diff
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|
1392 { |
|
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
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|
1393 int fd = fd_ring->fts_fd_ring[i]; |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
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diff
changeset
|
1394 if (fd < 0) |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
1395 fprintf (stream, "%d: %d:\n", i, 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
|
1396 else |
|
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
|
1397 { |
|
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
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|
1398 char *wd = getcwdat (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
|
1399 fprintf (stream, "%d: %d: %s\n", i, fd, wd); |
|
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
|
1400 free (wd); |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
1401 } |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
1402 if (i == fd_ring->fts_back) |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
1403 break; |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
1404 i = (i + I_RING_SIZE - 1) % I_RING_SIZE; |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
1405 } |
|
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
|
1406 } |
|
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
|
1407 |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
1408 /* 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:
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diff
changeset
|
1409 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>
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diff
changeset
|
1410 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
|
1411 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:
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diff
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|
1412 { |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
1413 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
|
1414 return; |
|
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
|
1415 |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
1416 /* 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
|
1417 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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diff
changeset
|
1418 |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
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7635
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|
1419 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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diff
changeset
|
1420 cwd_fd = dup (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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changeset
|
1421 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>
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7635
diff
changeset
|
1422 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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changeset
|
1423 free (dot); |
|
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
|
1424 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>
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7635
diff
changeset
|
1425 { |
|
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
|
1426 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>
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7635
diff
changeset
|
1427 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
changeset
|
1428 { |
|
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
|
1429 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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7635
diff
changeset
|
1430 if (parent_fd < 0) |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
1431 { |
|
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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
|
1432 // Warn? |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
1433 break; |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
1434 } |
|
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
|
1435 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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|
1436 { |
|
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
|
1437 char *cwd = getcwdat (fd, NULL, 0); |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
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diff
changeset
|
1438 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>
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diff
changeset
|
1439 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>
parents:
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diff
changeset
|
1440 error (0, errno, "parent: %s", c2); |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
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diff
changeset
|
1441 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
|
1442 free (c2); |
|
7785
3246679850d5
Slight readability improvement: use an assert-like macro
Jim Meyering <jim@meyering.net>
parents:
7707
diff
changeset
|
1443 fts_assert (0); |
|
7639
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
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changeset
|
1444 } |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
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diff
changeset
|
1445 close (cwd_fd); |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
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diff
changeset
|
1446 cwd_fd = parent_fd; |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
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diff
changeset
|
1447 } |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
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changeset
|
1448 } |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
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changeset
|
1449 close (cwd_fd); |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
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changeset
|
1450 } |
| 5858 | 1451 #endif |
| 1452 | |
| 1453 static unsigned short int | |
| 1454 internal_function | |
| 1455 fts_stat(FTS *sp, register FTSENT *p, bool follow) | |
| 1456 { | |
| 1457 struct stat *sbp = p->fts_statp; | |
| 1458 int saved_errno; | |
| 1459 | |
|
7482
26914593f079
Big performance improvement for fts-based tools that use FTS_NOSTAT.
Jim Meyering <jim@meyering.net>
parents:
7408
diff
changeset
|
1460 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
|
1461 follow = true; |
|
26914593f079
Big performance improvement for fts-based tools that use FTS_NOSTAT.
Jim Meyering <jim@meyering.net>
parents:
7408
diff
changeset
|
1462 |
| 5858 | 1463 #if defined FTS_WHITEOUT && 0 |
| 1464 /* check for whiteout */ | |
| 1465 if (p->fts_flags & FTS_ISW) { | |
| 1466 memset(sbp, '\0', sizeof (*sbp)); | |
| 1467 sbp->st_mode = S_IFWHT; | |
| 1468 return (FTS_W); | |
| 1469 } | |
| 1470 #endif | |
| 1471 | |
| 1472 /* | |
| 1473 * If doing a logical walk, or application requested FTS_FOLLOW, do | |
| 1474 * a stat(2). If that fails, check for a non-existent symlink. If | |
| 1475 * fail, set the errno from the stat call. | |
| 1476 */ | |
| 1477 if (ISSET(FTS_LOGICAL) || follow) { | |
| 1478 if (stat(p->fts_accpath, sbp)) { | |
| 1479 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
|
1480 if (errno == ENOENT |
|
e4456c51dde7
Sync from the stable (b5) branch of coreutils:
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parents:
6540
diff
changeset
|
1481 && lstat(p->fts_accpath, sbp) == 0) { |
| 5858 | 1482 __set_errno (0); |
| 1483 return (FTS_SLNONE); | |
| 1484 } | |
| 1485 p->fts_errno = saved_errno; | |
| 1486 goto err; | |
| 1487 } | |
| 7151 | 1488 } else if (fstatat(sp->fts_cwd_fd, p->fts_accpath, sbp, |
| 1489 AT_SYMLINK_NOFOLLOW)) { | |
| 5858 | 1490 p->fts_errno = errno; |
| 1491 err: memset(sbp, 0, sizeof(struct stat)); | |
| 1492 return (FTS_NS); | |
| 1493 } | |
| 1494 | |
| 1495 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
|
1496 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
|
1497 /* Command-line "." and ".." are real directories. */ |
|
26914593f079
Big performance improvement for fts-based tools that use FTS_NOSTAT.
Jim Meyering <jim@meyering.net>
parents:
7408
diff
changeset
|
1498 return (p->fts_level == FTS_ROOTLEVEL ? FTS_D : FTS_DOT); |
|
26914593f079
Big performance improvement for fts-based tools that use FTS_NOSTAT.
Jim Meyering <jim@meyering.net>
parents:
7408
diff
changeset
|
1499 } |
| 5872 | 1500 |
|
7797
10432bdf90d3
2007-01-08 Bruno Haible <bruno@clisp.org>
Bruno Haible <bruno@clisp.org>
parents:
7786
diff
changeset
|
1501 #if !GNULIB_FTS |
| 5872 | 1502 { |
| 1503 /* | |
| 1504 * Cycle detection is done by brute force when the directory | |
| 1505 * is first encountered. If the tree gets deep enough or the | |
| 1506 * number of symbolic links to directories is high enough, | |
| 1507 * something faster might be worthwhile. | |
| 1508 */ | |
| 1509 FTSENT *t; | |
| 1510 | |
| 1511 for (t = p->fts_parent; | |
| 1512 t->fts_level >= FTS_ROOTLEVEL; t = t->fts_parent) | |
| 1513 if (sbp->st_ino == t->fts_statp->st_ino | |
| 1514 && sbp->st_dev == t->fts_statp->st_dev) | |
| 1515 { | |
| 1516 p->fts_cycle = t; | |
| 1517 return (FTS_DC); | |
| 1518 } | |
| 1519 } | |
| 1520 #endif | |
| 1521 | |
| 5858 | 1522 return (FTS_D); |
| 1523 } | |
| 1524 if (S_ISLNK(sbp->st_mode)) | |
| 1525 return (FTS_SL); | |
| 1526 if (S_ISREG(sbp->st_mode)) | |
| 1527 return (FTS_F); | |
| 1528 return (FTS_DEFAULT); | |
| 1529 } | |
| 1530 | |
| 1531 static int | |
| 1532 fts_compar (void const *a, void const *b) | |
| 1533 { | |
| 1534 /* Convert A and B to the correct types, to pacify the compiler, and | |
| 1535 for portability to bizarre hosts where "void const *" and "FTSENT | |
| 1536 const **" differ in runtime representation. The comparison | |
| 1537 function cannot modify *a and *b, but there is no compile-time | |
| 1538 check for this. */ | |
| 1539 FTSENT const **pa = (FTSENT const **) a; | |
| 1540 FTSENT const **pb = (FTSENT const **) b; | |
| 1541 return pa[0]->fts_fts->fts_compar (pa, pb); | |
| 1542 } | |
| 1543 | |
| 1544 static FTSENT * | |
| 1545 internal_function | |
| 1546 fts_sort (FTS *sp, FTSENT *head, register size_t nitems) | |
| 1547 { | |
| 1548 register FTSENT **ap, *p; | |
| 1549 | |
| 1550 /* On most modern hosts, void * and FTSENT ** have the same | |
| 1551 run-time representation, and one can convert sp->fts_compar to | |
| 1552 the type qsort expects without problem. Use the heuristic that | |
| 1553 this is OK if the two pointer types are the same size, and if | |
| 1554 converting FTSENT ** to long int is the same as converting | |
| 1555 FTSENT ** to void * and then to long int. This heuristic isn't | |
| 1556 valid in general but we don't know of any counterexamples. */ | |
| 1557 FTSENT *dummy; | |
| 1558 int (*compare) (void const *, void const *) = | |
| 1559 ((sizeof &dummy == sizeof (void *) | |
| 1560 && (long int) &dummy == (long int) (void *) &dummy) | |
| 1561 ? (int (*) (void const *, void const *)) sp->fts_compar | |
| 1562 : fts_compar); | |
| 1563 | |
| 1564 /* | |
| 1565 * Construct an array of pointers to the structures and call qsort(3). | |
| 1566 * Reassemble the array in the order returned by qsort. If unable to | |
| 1567 * sort for memory reasons, return the directory entries in their | |
| 1568 * current order. Allocate enough space for the current needs plus | |
| 1569 * 40 so don't realloc one entry at a time. | |
| 1570 */ | |
| 1571 if (nitems > sp->fts_nitems) { | |
|
9562
1850c982220c
Avoid use of private FTS type name.
Jim Meyering <jim@meyering.net>
parents:
9309
diff
changeset
|
1572 FTSENT **a; |
| 5858 | 1573 |
| 1574 sp->fts_nitems = nitems + 40; | |
| 1575 if (SIZE_MAX / sizeof *a < sp->fts_nitems | |
| 1576 || ! (a = realloc (sp->fts_array, | |
| 1577 sp->fts_nitems * sizeof *a))) { | |
| 1578 free(sp->fts_array); | |
| 1579 sp->fts_array = NULL; | |
| 1580 sp->fts_nitems = 0; | |
| 1581 return (head); | |
| 1582 } | |
| 1583 sp->fts_array = a; | |
| 1584 } | |
| 1585 for (ap = sp->fts_array, p = head; p; p = p->fts_link) | |
| 1586 *ap++ = p; | |
| 1587 qsort((void *)sp->fts_array, nitems, sizeof(FTSENT *), compare); | |
| 1588 for (head = *(ap = sp->fts_array); --nitems; ++ap) | |
| 1589 ap[0]->fts_link = ap[1]; | |
| 1590 ap[0]->fts_link = NULL; | |
| 1591 return (head); | |
| 1592 } | |
| 1593 | |
| 1594 static FTSENT * | |
| 1595 internal_function | |
| 1596 fts_alloc (FTS *sp, const char *name, register size_t namelen) | |
| 1597 { | |
| 1598 register FTSENT *p; | |
| 1599 size_t len; | |
| 1600 | |
| 1601 /* | |
| 1602 * The file name is a variable length array. Allocate the FTSENT | |
| 1603 * structure and the file name in one chunk. | |
| 1604 */ | |
| 1605 len = sizeof(FTSENT) + namelen; | |
| 1606 if ((p = malloc(len)) == NULL) | |
| 1607 return (NULL); | |
| 1608 | |
| 1609 /* Copy the name and guarantee NUL termination. */ | |
| 1610 memmove(p->fts_name, name, namelen); | |
| 1611 p->fts_name[namelen] = '\0'; | |
| 1612 | |
| 1613 p->fts_namelen = namelen; | |
| 1614 p->fts_fts = sp; | |
| 1615 p->fts_path = sp->fts_path; | |
| 1616 p->fts_errno = 0; | |
| 1617 p->fts_flags = 0; | |
| 1618 p->fts_instr = FTS_NOINSTR; | |
| 1619 p->fts_number = 0; | |
| 1620 p->fts_pointer = NULL; | |
| 1621 return (p); | |
| 1622 } | |
| 1623 | |
| 1624 static void | |
| 1625 internal_function | |
| 1626 fts_lfree (register FTSENT *head) | |
| 1627 { | |
| 1628 register FTSENT *p; | |
| 1629 | |
| 1630 /* Free a linked list of structures. */ | |
| 1631 while ((p = head)) { | |
| 1632 head = head->fts_link; | |
| 1633 free(p); | |
| 1634 } | |
| 1635 } | |
| 1636 | |
| 1637 /* | |
| 5907 | 1638 * Allow essentially unlimited file name lengths; find, rm, ls should |
| 1639 * all work on any tree. Most systems will allow creation of file | |
| 1640 * names much longer than MAXPATHLEN, even though the kernel won't | |
| 1641 * resolve them. Add the size (not just what's needed) plus 256 bytes | |
| 1642 * so don't realloc the file name 2 bytes at a time. | |
| 5858 | 1643 */ |
| 1644 static bool | |
| 1645 internal_function | |
| 1646 fts_palloc (FTS *sp, size_t more) | |
| 1647 { | |
| 1648 char *p; | |
| 1649 size_t new_len = sp->fts_pathlen + more + 256; | |
| 1650 | |
| 1651 /* | |
| 1652 * See if fts_pathlen would overflow. | |
| 1653 */ | |
| 1654 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
|
1655 free(sp->fts_path); |
| 5858 | 1656 sp->fts_path = NULL; |
| 1657 __set_errno (ENAMETOOLONG); | |
| 1658 return false; | |
| 1659 } | |
| 1660 sp->fts_pathlen = new_len; | |
| 1661 p = realloc(sp->fts_path, sp->fts_pathlen); | |
| 1662 if (p == NULL) { | |
| 1663 free(sp->fts_path); | |
| 1664 sp->fts_path = NULL; | |
| 1665 return false; | |
| 1666 } | |
| 1667 sp->fts_path = p; | |
| 1668 return true; | |
| 1669 } | |
| 1670 | |
| 1671 /* | |
| 5907 | 1672 * When the file name is realloc'd, have to fix all of the pointers in |
| 1673 * structures already returned. | |
| 5858 | 1674 */ |
| 1675 static void | |
| 1676 internal_function | |
| 1677 fts_padjust (FTS *sp, FTSENT *head) | |
| 1678 { | |
| 1679 FTSENT *p; | |
| 1680 char *addr = sp->fts_path; | |
| 1681 | |
| 1682 #define ADJUST(p) do { \ | |
| 1683 if ((p)->fts_accpath != (p)->fts_name) { \ | |
| 1684 (p)->fts_accpath = \ | |
| 1685 (char *)addr + ((p)->fts_accpath - (p)->fts_path); \ | |
| 1686 } \ | |
| 1687 (p)->fts_path = addr; \ | |
| 1688 } while (0) | |
| 1689 /* Adjust the current set of children. */ | |
| 1690 for (p = sp->fts_child; p; p = p->fts_link) | |
| 1691 ADJUST(p); | |
| 1692 | |
| 1693 /* Adjust the rest of the tree, including the current level. */ | |
| 1694 for (p = head; p->fts_level >= FTS_ROOTLEVEL;) { | |
| 1695 ADJUST(p); | |
| 1696 p = p->fts_link ? p->fts_link : p->fts_parent; | |
| 1697 } | |
| 1698 } | |
| 1699 | |
| 1700 static size_t | |
| 1701 internal_function | |
| 1702 fts_maxarglen (char * const *argv) | |
| 1703 { | |
| 1704 size_t len, max; | |
| 1705 | |
| 1706 for (max = 0; *argv; ++argv) | |
| 1707 if ((len = strlen(*argv)) > max) | |
| 1708 max = len; | |
| 1709 return (max + 1); | |
| 1710 } | |
| 1711 | |
| 1712 /* | |
| 5907 | 1713 * Change to dir specified by fd or file name without getting |
| 5858 | 1714 * tricked by someone changing the world out from underneath us. |
| 1715 * Assumes p->fts_statp->st_dev and p->fts_statp->st_ino are filled in. | |
| 7151 | 1716 * If FD is non-negative, expect it to be used after this function returns, |
| 1717 * and to be closed eventually. So don't pass e.g., `dirfd(dirp)' and then | |
| 1718 * do closedir(dirp), because that would invalidate the saved FD. | |
| 1719 * Upon failure, close FD immediately and return nonzero. | |
| 5858 | 1720 */ |
| 1721 static int | |
| 1722 internal_function | |
| 5907 | 1723 fts_safe_changedir (FTS *sp, FTSENT *p, int fd, char const *dir) |
| 5858 | 1724 { |
| 7151 | 1725 int ret; |
|
7639
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
1726 bool is_dotdot = dir && STREQ (dir, ".."); |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
1727 int newfd; |
|
7623
5bfad7d666d6
* lib/fts.c (fts_safe_changedir): Add a comment.
Jim Meyering <jim@meyering.net>
parents:
7621
diff
changeset
|
1728 |
|
5bfad7d666d6
* lib/fts.c (fts_safe_changedir): Add a comment.
Jim Meyering <jim@meyering.net>
parents:
7621
diff
changeset
|
1729 /* This clause handles the unusual case in which FTS_NOCHDIR |
|
5bfad7d666d6
* lib/fts.c (fts_safe_changedir): Add a comment.
Jim Meyering <jim@meyering.net>
parents:
7621
diff
changeset
|
1730 is specified, along with FTS_CWDFD. In that case, there is |
|
5bfad7d666d6
* lib/fts.c (fts_safe_changedir): Add a comment.
Jim Meyering <jim@meyering.net>
parents:
7621
diff
changeset
|
1731 no need to change even the virtual cwd file descriptor. |
|
5bfad7d666d6
* lib/fts.c (fts_safe_changedir): Add a comment.
Jim Meyering <jim@meyering.net>
parents:
7621
diff
changeset
|
1732 However, if FD is non-negative, we do close it here. */ |
|
7639
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
1733 if (ISSET (FTS_NOCHDIR)) |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
1734 { |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
1735 if (ISSET (FTS_CWDFD) && 0 <= fd) |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
1736 close (fd); |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
1737 return 0; |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
1738 } |
| 5858 | 1739 |
|
7639
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
1740 if (fd < 0 && is_dotdot && ISSET (FTS_CWDFD)) |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
1741 { |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
1742 /* When possible, skip the diropen and subsequent fstat+dev/ino |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
1743 comparison. I.e., when changing to parent directory |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
1744 (chdir ("..")), use a file descriptor from the ring and |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
1745 save the overhead of diropen+fstat, as well as avoiding |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
1746 failure when we lack "x" access to the virtual cwd. */ |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
1747 if ( ! i_ring_empty (&sp->fts_fd_ring)) |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
1748 { |
|
7681
a6b7b31e9ddf
* lib/fts.c (fts_safe_changedir): Move a declaration "up",
Jim Meyering <jim@meyering.net>
parents:
7639
diff
changeset
|
1749 int parent_fd; |
|
7639
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
1750 fd_ring_print (sp, stderr, "pre-pop"); |
|
7681
a6b7b31e9ddf
* lib/fts.c (fts_safe_changedir): Move a declaration "up",
Jim Meyering <jim@meyering.net>
parents:
7639
diff
changeset
|
1751 parent_fd = i_ring_pop (&sp->fts_fd_ring); |
|
7639
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
1752 is_dotdot = true; |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
1753 if (0 <= parent_fd) |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
1754 { |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
1755 fd = parent_fd; |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
1756 dir = NULL; |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
1757 } |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
1758 } |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
1759 } |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
1760 |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
1761 newfd = fd; |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
1762 if (fd < 0 && (newfd = diropen (sp, dir)) < 0) |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
1763 return -1; |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
1764 |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
1765 /* The following dev/inode check is necessary if we're doing a |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
1766 `logical' traversal (through symlinks, a la chown -L), if the |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
1767 system lacks O_NOFOLLOW support, or if we're changing to ".." |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
1768 (but not via a popped file descriptor). When changing to the |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
1769 name "..", O_NOFOLLOW can't help. In general, when the target is |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
1770 not "..", diropen's use of O_NOFOLLOW ensures we don't mistakenly |
|
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
1771 follow a symlink, so we can avoid the expense of this fstat. */ |
| 7408 | 1772 if (ISSET(FTS_LOGICAL) || ! HAVE_WORKING_O_NOFOLLOW |
| 7151 | 1773 || (dir && STREQ (dir, ".."))) |
| 1774 { | |
| 1775 struct stat sb; | |
| 1776 if (fstat(newfd, &sb)) | |
| 1777 { | |
| 5858 | 1778 ret = -1; |
| 1779 goto bail; | |
| 7151 | 1780 } |
| 1781 if (p->fts_statp->st_dev != sb.st_dev | |
| 1782 || p->fts_statp->st_ino != sb.st_ino) | |
| 1783 { | |
| 5858 | 1784 __set_errno (ENOENT); /* disinformation */ |
| 1785 ret = -1; | |
| 1786 goto bail; | |
| 7151 | 1787 } |
| 1788 } | |
| 1789 | |
| 1790 if (ISSET(FTS_CWDFD)) | |
| 1791 { | |
|
7639
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
1792 cwd_advance_fd (sp, newfd, ! is_dotdot); |
| 7151 | 1793 return 0; |
| 1794 } | |
| 1795 | |
| 5858 | 1796 ret = fchdir(newfd); |
| 1797 bail: | |
| 1798 if (fd < 0) | |
| 7151 | 1799 { |
| 1800 int oerrno = errno; | |
| 1801 (void)close(newfd); | |
| 1802 __set_errno (oerrno); | |
| 1803 } | |
|
7639
1670d42131d7
Make fts (in FTS_CWDFD mode) more efficient by caching a few open
Jim Meyering <jim@meyering.net>
parents:
7635
diff
changeset
|
1804 return ret; |
| 5858 | 1805 } |