| 1 | /* Copyright (C) 1991-2020 Free Software Foundation, Inc. |
| 2 | This file is part of the GNU C Library. |
| 3 | |
| 4 | The GNU C Library is free software; you can redistribute it and/or |
| 5 | modify it under the terms of the GNU General Public |
| 6 | License as published by the Free Software Foundation; either |
| 7 | version 3 of the License, or (at your option) any later version. |
| 8 | |
| 9 | The GNU C Library is distributed in the hope that it will be useful, |
| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 12 | General Public License for more details. |
| 13 | |
| 14 | You should have received a copy of the GNU General Public |
| 15 | License along with the GNU C Library; if not, see |
| 16 | <https://www.gnu.org/licenses/>. */ |
| 17 | |
| 18 | #ifndef _LIBC |
| 19 | |
| 20 | /* Don't use __attribute__ __nonnull__ in this compilation unit. Otherwise gcc |
| 21 | optimizes away the pattern == NULL test below. */ |
| 22 | # define _GL_ARG_NONNULL(params) |
| 23 | |
| 24 | # include <config.h> |
| 25 | |
| 26 | #endif |
| 27 | |
| 28 | #include <glob.h> |
| 29 | |
| 30 | #include <errno.h> |
| 31 | #include <sys/types.h> |
| 32 | #include <sys/stat.h> |
| 33 | #include <stdbool.h> |
| 34 | #include <stddef.h> |
| 35 | #include <stdint.h> |
| 36 | #include <assert.h> |
| 37 | #include <unistd.h> |
| 38 | |
| 39 | #if defined _WIN32 && ! defined __CYGWIN__ |
| 40 | # define WINDOWS32 |
| 41 | #endif |
| 42 | |
| 43 | #ifndef WINDOWS32 |
| 44 | # include <pwd.h> |
| 45 | #endif |
| 46 | |
| 47 | #include <errno.h> |
| 48 | #include <dirent.h> |
| 49 | #include <stdlib.h> |
| 50 | #include <string.h> |
| 51 | #include <alloca.h> |
| 52 | |
| 53 | #ifdef _LIBC |
| 54 | # undef strdup |
| 55 | # define strdup(str) __strdup (str) |
| 56 | # define sysconf(id) __sysconf (id) |
| 57 | # define closedir(dir) __closedir (dir) |
| 58 | # define opendir(name) __opendir (name) |
| 59 | # define readdir(str) __readdir64 (str) |
| 60 | # define getpwnam_r(name, bufp, buf, len, res) \ |
| 61 | __getpwnam_r (name, bufp, buf, len, res) |
| 62 | # ifndef __lstat64 |
| 63 | # define __lstat64(fname, buf) __lxstat64 (_STAT_VER, fname, buf) |
| 64 | # endif |
| 65 | # ifndef __stat64 |
| 66 | # define __stat64(fname, buf) __xstat64 (_STAT_VER, fname, buf) |
| 67 | # endif |
| 68 | # define struct_stat64 struct stat64 |
| 69 | # define FLEXIBLE_ARRAY_MEMBER |
| 70 | # include <shlib-compat.h> |
| 71 | #else /* !_LIBC */ |
| 72 | # define __glob glob |
| 73 | # define __getlogin_r(buf, len) getlogin_r (buf, len) |
| 74 | # define __lstat64(fname, buf) lstat (fname, buf) |
| 75 | # ifdef __MINGW32__ |
| 76 | /* Avoid GCC warning. mingw has an unused __stat64 macro. */ |
| 77 | # undef __stat64 |
| 78 | # endif |
| 79 | # define __stat64(fname, buf) stat (fname, buf) |
| 80 | # define __fxstatat64(_, d, f, st, flag) fstatat (d, f, st, flag) |
| 81 | # define struct_stat64 struct stat |
| 82 | # ifndef __MVS__ |
| 83 | # define __alloca alloca |
| 84 | # endif |
| 85 | # define __readdir readdir |
| 86 | # define COMPILE_GLOB64 |
| 87 | #endif /* _LIBC */ |
| 88 | |
| 89 | #include <fnmatch.h> |
| 90 | |
| 91 | #include <flexmember.h> |
| 92 | #include <glob_internal.h> |
| 93 | #include <scratch_buffer.h> |
| 94 | \f |
| 95 | static const char *next_brace_sub (const char *begin, int flags) __THROWNL; |
| 96 | |
| 97 | /* The type of ((struct dirent *) 0)->d_type is 'unsigned char' on most |
| 98 | platforms, but 'unsigned int' in the mingw from mingw.org. */ |
| 99 | typedef uint_fast32_t dirent_type; |
| 100 | |
| 101 | #if !defined _LIBC && !defined HAVE_STRUCT_DIRENT_D_TYPE |
| 102 | /* Any distinct values will do here. |
| 103 | Undef any existing macros out of the way. */ |
| 104 | # undef DT_UNKNOWN |
| 105 | # undef DT_DIR |
| 106 | # undef DT_LNK |
| 107 | # define DT_UNKNOWN 0 |
| 108 | # define DT_DIR 1 |
| 109 | # define DT_LNK 2 |
| 110 | #endif |
| 111 | |
| 112 | /* A representation of a directory entry which does not depend on the |
| 113 | layout of struct dirent, or the size of ino_t. */ |
| 114 | struct readdir_result |
| 115 | { |
| 116 | const char *name; |
| 117 | #if defined _DIRENT_HAVE_D_TYPE || defined HAVE_STRUCT_DIRENT_D_TYPE |
| 118 | dirent_type type; |
| 119 | #endif |
| 120 | }; |
| 121 | |
| 122 | /* Initialize and return type member of struct readdir_result. */ |
| 123 | static dirent_type |
| 124 | readdir_result_type (struct readdir_result d) |
| 125 | { |
| 126 | #if defined _DIRENT_HAVE_D_TYPE || defined HAVE_STRUCT_DIRENT_D_TYPE |
| 127 | # define D_TYPE_TO_RESULT(source) (source)->d_type, |
| 128 | return d.type; |
| 129 | #else |
| 130 | # define D_TYPE_TO_RESULT(source) |
| 131 | return DT_UNKNOWN; |
| 132 | #endif |
| 133 | } |
| 134 | |
| 135 | /* Construct an initializer for a struct readdir_result object from a |
| 136 | struct dirent *. No copy of the name is made. */ |
| 137 | #define READDIR_RESULT_INITIALIZER(source) \ |
| 138 | { \ |
| 139 | source->d_name, \ |
| 140 | D_TYPE_TO_RESULT (source) \ |
| 141 | } |
| 142 | |
| 143 | /* Call gl_readdir on STREAM. This macro can be overridden to reduce |
| 144 | type safety if an old interface version needs to be supported. */ |
| 145 | #ifndef GL_READDIR |
| 146 | # define GL_READDIR(pglob, stream) ((pglob)->gl_readdir (stream)) |
| 147 | #endif |
| 148 | |
| 149 | /* Extract name and type from directory entry. No copy of the name is |
| 150 | made. If SOURCE is NULL, result name is NULL. Keep in sync with |
| 151 | convert_dirent64 below. */ |
| 152 | static struct readdir_result |
| 153 | convert_dirent (const struct dirent *source) |
| 154 | { |
| 155 | if (source == NULL) |
| 156 | { |
| 157 | struct readdir_result result = { NULL, }; |
| 158 | return result; |
| 159 | } |
| 160 | struct readdir_result result = READDIR_RESULT_INITIALIZER (source); |
| 161 | return result; |
| 162 | } |
| 163 | |
| 164 | #ifndef COMPILE_GLOB64 |
| 165 | /* Like convert_dirent, but works on struct dirent64 instead. Keep in |
| 166 | sync with convert_dirent above. */ |
| 167 | static struct readdir_result |
| 168 | convert_dirent64 (const struct dirent64 *source) |
| 169 | { |
| 170 | if (source == NULL) |
| 171 | { |
| 172 | struct readdir_result result = { NULL, }; |
| 173 | return result; |
| 174 | } |
| 175 | struct readdir_result result = READDIR_RESULT_INITIALIZER (source); |
| 176 | return result; |
| 177 | } |
| 178 | #endif |
| 179 | |
| 180 | #ifndef _LIBC |
| 181 | /* The results of opendir() in this file are not used with dirfd and fchdir, |
| 182 | and we do not leak fds to any single-threaded code that could use stdio, |
| 183 | therefore save some unnecessary recursion in fchdir.c and opendir_safer.c. |
| 184 | FIXME - if the kernel ever adds support for multi-thread safety for |
| 185 | avoiding standard fds, then we should use opendir_safer. */ |
| 186 | # ifdef GNULIB_defined_opendir |
| 187 | # undef opendir |
| 188 | # endif |
| 189 | # ifdef GNULIB_defined_closedir |
| 190 | # undef closedir |
| 191 | # endif |
| 192 | |
| 193 | /* Just use malloc. */ |
| 194 | # define __libc_use_alloca(n) false |
| 195 | # define alloca_account(len, avar) ((void) (len), (void) (avar), (void *) 0) |
| 196 | # define extend_alloca_account(buf, len, newlen, avar) \ |
| 197 | ((void) (buf), (void) (len), (void) (newlen), (void) (avar), (void *) 0) |
| 198 | #endif |
| 199 | |
| 200 | static int |
| 201 | glob_lstat (glob_t *pglob, int flags, const char *fullname) |
| 202 | { |
| 203 | /* Use on glob-lstat-compat.c to provide a compat symbol which does not |
| 204 | use lstat / gl_lstat. */ |
| 205 | #ifdef GLOB_NO_LSTAT |
| 206 | # define GL_LSTAT gl_stat |
| 207 | # define LSTAT64 __stat64 |
| 208 | #else |
| 209 | # define GL_LSTAT gl_lstat |
| 210 | # define LSTAT64 __lstat64 |
| 211 | #endif |
| 212 | |
| 213 | union |
| 214 | { |
| 215 | struct stat st; |
| 216 | struct_stat64 st64; |
| 217 | } ust; |
| 218 | return (__glibc_unlikely (flags & GLOB_ALTDIRFUNC) |
| 219 | ? pglob->GL_LSTAT (fullname, &ust.st) |
| 220 | : LSTAT64 (fullname, &ust.st64)); |
| 221 | } |
| 222 | |
| 223 | /* Set *R = A + B. Return true if the answer is mathematically |
| 224 | incorrect due to overflow; in this case, *R is the low order |
| 225 | bits of the correct answer. */ |
| 226 | |
| 227 | static bool |
| 228 | size_add_wrapv (size_t a, size_t b, size_t *r) |
| 229 | { |
| 230 | #if 5 <= __GNUC__ && !defined __ICC |
| 231 | return __builtin_add_overflow (a, b, r); |
| 232 | #else |
| 233 | *r = a + b; |
| 234 | return *r < a; |
| 235 | #endif |
| 236 | } |
| 237 | |
| 238 | static bool |
| 239 | glob_use_alloca (size_t alloca_used, size_t len) |
| 240 | { |
| 241 | size_t size; |
| 242 | return (!size_add_wrapv (alloca_used, len, &size) |
| 243 | && __libc_use_alloca (size)); |
| 244 | } |
| 245 | |
| 246 | static int glob_in_dir (const char *pattern, const char *directory, |
| 247 | int flags, int (*errfunc) (const char *, int), |
| 248 | glob_t *pglob, size_t alloca_used); |
| 249 | static int prefix_array (const char *prefix, char **array, size_t n) __THROWNL; |
| 250 | static int collated_compare (const void *, const void *) __THROWNL; |
| 251 | |
| 252 | |
| 253 | /* Return true if FILENAME is a directory or a symbolic link to a directory. |
| 254 | Use FLAGS and PGLOB to resolve the filename. */ |
| 255 | static bool |
| 256 | is_dir (char const *filename, int flags, glob_t const *pglob) |
| 257 | { |
| 258 | struct stat st; |
| 259 | struct_stat64 st64; |
| 260 | return (__glibc_unlikely (flags & GLOB_ALTDIRFUNC) |
| 261 | ? pglob->gl_stat (filename, &st) == 0 && S_ISDIR (st.st_mode) |
| 262 | : __stat64 (filename, &st64) == 0 && S_ISDIR (st64.st_mode)); |
| 263 | } |
| 264 | |
| 265 | /* Find the end of the sub-pattern in a brace expression. */ |
| 266 | static const char * |
| 267 | next_brace_sub (const char *cp, int flags) |
| 268 | { |
| 269 | size_t depth = 0; |
| 270 | while (*cp != '\0') |
| 271 | if ((flags & GLOB_NOESCAPE) == 0 && *cp == '\\') |
| 272 | { |
| 273 | if (*++cp == '\0') |
| 274 | break; |
| 275 | ++cp; |
| 276 | } |
| 277 | else |
| 278 | { |
| 279 | if ((*cp == '}' && depth-- == 0) || (*cp == ',' && depth == 0)) |
| 280 | break; |
| 281 | |
| 282 | if (*cp++ == '{') |
| 283 | depth++; |
| 284 | } |
| 285 | |
| 286 | return *cp != '\0' ? cp : NULL; |
| 287 | } |
| 288 | |
| 289 | #ifndef GLOB_ATTRIBUTE |
| 290 | # define GLOB_ATTRIBUTE |
| 291 | #endif |
| 292 | |
| 293 | /* Do glob searching for PATTERN, placing results in PGLOB. |
| 294 | The bits defined above may be set in FLAGS. |
| 295 | If a directory cannot be opened or read and ERRFUNC is not nil, |
| 296 | it is called with the pathname that caused the error, and the |
| 297 | 'errno' value from the failing call; if it returns non-zero |
| 298 | 'glob' returns GLOB_ABORTED; if it returns zero, the error is ignored. |
| 299 | If memory cannot be allocated for PGLOB, GLOB_NOSPACE is returned. |
| 300 | Otherwise, 'glob' returns zero. */ |
| 301 | int |
| 302 | GLOB_ATTRIBUTE |
| 303 | __glob (const char *pattern, int flags, int (*errfunc) (const char *, int), |
| 304 | glob_t *pglob) |
| 305 | { |
| 306 | const char *filename; |
| 307 | char *dirname = NULL; |
| 308 | size_t dirlen; |
| 309 | int status; |
| 310 | size_t oldcount; |
| 311 | int meta; |
| 312 | int dirname_modified; |
| 313 | int malloc_dirname = 0; |
| 314 | glob_t dirs; |
| 315 | int retval = 0; |
| 316 | size_t alloca_used = 0; |
| 317 | |
| 318 | if (pattern == NULL || pglob == NULL || (flags & ~__GLOB_FLAGS) != 0) |
| 319 | { |
| 320 | __set_errno (EINVAL); |
| 321 | return -1; |
| 322 | } |
| 323 | |
| 324 | /* POSIX requires all slashes to be matched. This means that with |
| 325 | a trailing slash we must match only directories. */ |
| 326 | if (pattern[0] && pattern[strlen (pattern) - 1] == '/') |
| 327 | flags |= GLOB_ONLYDIR; |
| 328 | |
| 329 | if (!(flags & GLOB_DOOFFS)) |
| 330 | /* Have to do this so 'globfree' knows where to start freeing. It |
| 331 | also makes all the code that uses gl_offs simpler. */ |
| 332 | pglob->gl_offs = 0; |
| 333 | |
| 334 | if (!(flags & GLOB_APPEND)) |
| 335 | { |
| 336 | pglob->gl_pathc = 0; |
| 337 | if (!(flags & GLOB_DOOFFS)) |
| 338 | pglob->gl_pathv = NULL; |
| 339 | else |
| 340 | { |
| 341 | size_t i; |
| 342 | |
| 343 | if (pglob->gl_offs >= ~((size_t) 0) / sizeof (char *)) |
| 344 | return GLOB_NOSPACE; |
| 345 | |
| 346 | pglob->gl_pathv = (char **) malloc ((pglob->gl_offs + 1) |
| 347 | * sizeof (char *)); |
| 348 | if (pglob->gl_pathv == NULL) |
| 349 | return GLOB_NOSPACE; |
| 350 | |
| 351 | for (i = 0; i <= pglob->gl_offs; ++i) |
| 352 | pglob->gl_pathv[i] = NULL; |
| 353 | } |
| 354 | } |
| 355 | |
| 356 | if (flags & GLOB_BRACE) |
| 357 | { |
| 358 | const char *begin; |
| 359 | |
| 360 | if (flags & GLOB_NOESCAPE) |
| 361 | begin = strchr (pattern, '{'); |
| 362 | else |
| 363 | { |
| 364 | begin = pattern; |
| 365 | while (1) |
| 366 | { |
| 367 | if (*begin == '\0') |
| 368 | { |
| 369 | begin = NULL; |
| 370 | break; |
| 371 | } |
| 372 | |
| 373 | if (*begin == '\\' && begin[1] != '\0') |
| 374 | ++begin; |
| 375 | else if (*begin == '{') |
| 376 | break; |
| 377 | |
| 378 | ++begin; |
| 379 | } |
| 380 | } |
| 381 | |
| 382 | if (begin != NULL) |
| 383 | { |
| 384 | /* Allocate working buffer large enough for our work. Note that |
| 385 | we have at least an opening and closing brace. */ |
| 386 | size_t firstc; |
| 387 | char *alt_start; |
| 388 | const char *p; |
| 389 | const char *next; |
| 390 | const char *rest; |
| 391 | size_t rest_len; |
| 392 | char *onealt; |
| 393 | size_t pattern_len = strlen (pattern) - 1; |
| 394 | int alloca_onealt = glob_use_alloca (alloca_used, pattern_len); |
| 395 | if (alloca_onealt) |
| 396 | onealt = alloca_account (pattern_len, alloca_used); |
| 397 | else |
| 398 | { |
| 399 | onealt = malloc (pattern_len); |
| 400 | if (onealt == NULL) |
| 401 | return GLOB_NOSPACE; |
| 402 | } |
| 403 | |
| 404 | /* We know the prefix for all sub-patterns. */ |
| 405 | alt_start = mempcpy (onealt, pattern, begin - pattern); |
| 406 | |
| 407 | /* Find the first sub-pattern and at the same time find the |
| 408 | rest after the closing brace. */ |
| 409 | next = next_brace_sub (begin + 1, flags); |
| 410 | if (next == NULL) |
| 411 | { |
| 412 | /* It is an invalid expression. */ |
| 413 | illegal_brace: |
| 414 | if (__glibc_unlikely (!alloca_onealt)) |
| 415 | free (onealt); |
| 416 | flags &= ~GLOB_BRACE; |
| 417 | goto no_brace; |
| 418 | } |
| 419 | |
| 420 | /* Now find the end of the whole brace expression. */ |
| 421 | rest = next; |
| 422 | while (*rest != '}') |
| 423 | { |
| 424 | rest = next_brace_sub (rest + 1, flags); |
| 425 | if (rest == NULL) |
| 426 | /* It is an illegal expression. */ |
| 427 | goto illegal_brace; |
| 428 | } |
| 429 | /* Please note that we now can be sure the brace expression |
| 430 | is well-formed. */ |
| 431 | rest_len = strlen (++rest) + 1; |
| 432 | |
| 433 | /* We have a brace expression. BEGIN points to the opening {, |
| 434 | NEXT points past the terminator of the first element, and END |
| 435 | points past the final }. We will accumulate result names from |
| 436 | recursive runs for each brace alternative in the buffer using |
| 437 | GLOB_APPEND. */ |
| 438 | firstc = pglob->gl_pathc; |
| 439 | |
| 440 | p = begin + 1; |
| 441 | while (1) |
| 442 | { |
| 443 | int result; |
| 444 | |
| 445 | /* Construct the new glob expression. */ |
| 446 | mempcpy (mempcpy (alt_start, p, next - p), rest, rest_len); |
| 447 | |
| 448 | result = __glob (onealt, |
| 449 | ((flags & ~(GLOB_NOCHECK | GLOB_NOMAGIC)) |
| 450 | | GLOB_APPEND), |
| 451 | errfunc, pglob); |
| 452 | |
| 453 | /* If we got an error, return it. */ |
| 454 | if (result && result != GLOB_NOMATCH) |
| 455 | { |
| 456 | if (__glibc_unlikely (!alloca_onealt)) |
| 457 | free (onealt); |
| 458 | if (!(flags & GLOB_APPEND)) |
| 459 | { |
| 460 | globfree (pglob); |
| 461 | pglob->gl_pathc = 0; |
| 462 | } |
| 463 | return result; |
| 464 | } |
| 465 | |
| 466 | if (*next == '}') |
| 467 | /* We saw the last entry. */ |
| 468 | break; |
| 469 | |
| 470 | p = next + 1; |
| 471 | next = next_brace_sub (p, flags); |
| 472 | assert (next != NULL); |
| 473 | } |
| 474 | |
| 475 | if (__glibc_unlikely (!alloca_onealt)) |
| 476 | free (onealt); |
| 477 | |
| 478 | if (pglob->gl_pathc != firstc) |
| 479 | /* We found some entries. */ |
| 480 | return 0; |
| 481 | else if (!(flags & (GLOB_NOCHECK|GLOB_NOMAGIC))) |
| 482 | return GLOB_NOMATCH; |
| 483 | } |
| 484 | } |
| 485 | |
| 486 | no_brace: |
| 487 | oldcount = pglob->gl_pathc + pglob->gl_offs; |
| 488 | |
| 489 | /* Find the filename. */ |
| 490 | filename = strrchr (pattern, '/'); |
| 491 | |
| 492 | #if defined __MSDOS__ || defined WINDOWS32 |
| 493 | /* The case of "d:pattern". Since ':' is not allowed in |
| 494 | file names, we can safely assume that wherever it |
| 495 | happens in pattern, it signals the filename part. This |
| 496 | is so we could some day support patterns like "[a-z]:foo". */ |
| 497 | if (filename == NULL) |
| 498 | filename = strchr (pattern, ':'); |
| 499 | #endif /* __MSDOS__ || WINDOWS32 */ |
| 500 | |
| 501 | dirname_modified = 0; |
| 502 | if (filename == NULL) |
| 503 | { |
| 504 | /* This can mean two things: a simple name or "~name". The latter |
| 505 | case is nothing but a notation for a directory. */ |
| 506 | if ((flags & (GLOB_TILDE|GLOB_TILDE_CHECK)) && pattern[0] == '~') |
| 507 | { |
| 508 | dirname = (char *) pattern; |
| 509 | dirlen = strlen (pattern); |
| 510 | |
| 511 | /* Set FILENAME to NULL as a special flag. This is ugly but |
| 512 | other solutions would require much more code. We test for |
| 513 | this special case below. */ |
| 514 | filename = NULL; |
| 515 | } |
| 516 | else |
| 517 | { |
| 518 | if (__glibc_unlikely (pattern[0] == '\0')) |
| 519 | { |
| 520 | dirs.gl_pathv = NULL; |
| 521 | goto no_matches; |
| 522 | } |
| 523 | |
| 524 | filename = pattern; |
| 525 | dirname = (char *) "."; |
| 526 | dirlen = 0; |
| 527 | } |
| 528 | } |
| 529 | else if (filename == pattern |
| 530 | || (filename == pattern + 1 && pattern[0] == '\\' |
| 531 | && (flags & GLOB_NOESCAPE) == 0)) |
| 532 | { |
| 533 | /* "/pattern" or "\\/pattern". */ |
| 534 | dirname = (char *) "/"; |
| 535 | dirlen = 1; |
| 536 | ++filename; |
| 537 | } |
| 538 | else |
| 539 | { |
| 540 | char *newp; |
| 541 | dirlen = filename - pattern; |
| 542 | #if defined __MSDOS__ || defined WINDOWS32 |
| 543 | if (*filename == ':' |
| 544 | || (filename > pattern + 1 && filename[-1] == ':')) |
| 545 | { |
| 546 | char *drive_spec; |
| 547 | |
| 548 | ++dirlen; |
| 549 | drive_spec = __alloca (dirlen + 1); |
| 550 | *((char *) mempcpy (drive_spec, pattern, dirlen)) = '\0'; |
| 551 | /* For now, disallow wildcards in the drive spec, to |
| 552 | prevent infinite recursion in glob. */ |
| 553 | if (__glob_pattern_p (drive_spec, !(flags & GLOB_NOESCAPE))) |
| 554 | return GLOB_NOMATCH; |
| 555 | /* If this is "d:pattern", we need to copy ':' to DIRNAME |
| 556 | as well. If it's "d:/pattern", don't remove the slash |
| 557 | from "d:/", since "d:" and "d:/" are not the same.*/ |
| 558 | } |
| 559 | #endif |
| 560 | |
| 561 | if (glob_use_alloca (alloca_used, dirlen + 1)) |
| 562 | newp = alloca_account (dirlen + 1, alloca_used); |
| 563 | else |
| 564 | { |
| 565 | newp = malloc (dirlen + 1); |
| 566 | if (newp == NULL) |
| 567 | return GLOB_NOSPACE; |
| 568 | malloc_dirname = 1; |
| 569 | } |
| 570 | *((char *) mempcpy (newp, pattern, dirlen)) = '\0'; |
| 571 | dirname = newp; |
| 572 | ++filename; |
| 573 | |
| 574 | #if defined __MSDOS__ || defined WINDOWS32 |
| 575 | bool drive_root = (dirlen > 1 |
| 576 | && (dirname[dirlen - 1] == ':' |
| 577 | || (dirlen > 2 && dirname[dirlen - 2] == ':' |
| 578 | && dirname[dirlen - 1] == '/'))); |
| 579 | #else |
| 580 | bool drive_root = false; |
| 581 | #endif |
| 582 | |
| 583 | if (filename[0] == '\0' && dirlen > 1 && !drive_root) |
| 584 | /* "pattern/". Expand "pattern", appending slashes. */ |
| 585 | { |
| 586 | int orig_flags = flags; |
| 587 | if (!(flags & GLOB_NOESCAPE) && dirname[dirlen - 1] == '\\') |
| 588 | { |
| 589 | /* "pattern\\/". Remove the final backslash if it hasn't |
| 590 | been quoted. */ |
| 591 | char *p = (char *) &dirname[dirlen - 1]; |
| 592 | |
| 593 | while (p > dirname && p[-1] == '\\') --p; |
| 594 | if ((&dirname[dirlen] - p) & 1) |
| 595 | { |
| 596 | *(char *) &dirname[--dirlen] = '\0'; |
| 597 | flags &= ~(GLOB_NOCHECK | GLOB_NOMAGIC); |
| 598 | } |
| 599 | } |
| 600 | int val = __glob (dirname, flags | GLOB_MARK, errfunc, pglob); |
| 601 | if (val == 0) |
| 602 | pglob->gl_flags = ((pglob->gl_flags & ~GLOB_MARK) |
| 603 | | (flags & GLOB_MARK)); |
| 604 | else if (val == GLOB_NOMATCH && flags != orig_flags) |
| 605 | { |
| 606 | /* Make sure globfree (&dirs); is a nop. */ |
| 607 | dirs.gl_pathv = NULL; |
| 608 | flags = orig_flags; |
| 609 | oldcount = pglob->gl_pathc + pglob->gl_offs; |
| 610 | goto no_matches; |
| 611 | } |
| 612 | retval = val; |
| 613 | goto out; |
| 614 | } |
| 615 | } |
| 616 | |
| 617 | if ((flags & (GLOB_TILDE|GLOB_TILDE_CHECK)) && dirname[0] == '~') |
| 618 | { |
| 619 | if (dirname[1] == '\0' || dirname[1] == '/' |
| 620 | || (!(flags & GLOB_NOESCAPE) && dirname[1] == '\\' |
| 621 | && (dirname[2] == '\0' || dirname[2] == '/'))) |
| 622 | { |
| 623 | /* Look up home directory. */ |
| 624 | char *home_dir = getenv ("HOME"); |
| 625 | int malloc_home_dir = 0; |
| 626 | if (home_dir == NULL || home_dir[0] == '\0') |
| 627 | { |
| 628 | #ifdef WINDOWS32 |
| 629 | /* Windows NT defines HOMEDRIVE and HOMEPATH. But give |
| 630 | preference to HOME, because the user can change HOME. */ |
| 631 | const char *home_drive = getenv ("HOMEDRIVE"); |
| 632 | const char *home_path = getenv ("HOMEPATH"); |
| 633 | |
| 634 | if (home_drive != NULL && home_path != NULL) |
| 635 | { |
| 636 | size_t home_drive_len = strlen (home_drive); |
| 637 | size_t home_path_len = strlen (home_path); |
| 638 | char *mem = alloca (home_drive_len + home_path_len + 1); |
| 639 | |
| 640 | memcpy (mem, home_drive, home_drive_len); |
| 641 | memcpy (mem + home_drive_len, home_path, home_path_len + 1); |
| 642 | home_dir = mem; |
| 643 | } |
| 644 | else |
| 645 | home_dir = "c:/users/default"; /* poor default */ |
| 646 | #else |
| 647 | int err; |
| 648 | struct passwd *p; |
| 649 | struct passwd pwbuf; |
| 650 | struct scratch_buffer s; |
| 651 | scratch_buffer_init (&s); |
| 652 | while (true) |
| 653 | { |
| 654 | p = NULL; |
| 655 | err = __getlogin_r (s.data, s.length); |
| 656 | if (err == 0) |
| 657 | { |
| 658 | # if defined HAVE_GETPWNAM_R || defined _LIBC |
| 659 | size_t ssize = strlen (s.data) + 1; |
| 660 | char *sdata = s.data; |
| 661 | err = getpwnam_r (sdata, &pwbuf, sdata + ssize, |
| 662 | s.length - ssize, &p); |
| 663 | # else |
| 664 | p = getpwnam (s.data); |
| 665 | if (p == NULL) |
| 666 | err = errno; |
| 667 | # endif |
| 668 | } |
| 669 | if (err != ERANGE) |
| 670 | break; |
| 671 | if (!scratch_buffer_grow (&s)) |
| 672 | { |
| 673 | retval = GLOB_NOSPACE; |
| 674 | goto out; |
| 675 | } |
| 676 | } |
| 677 | if (err == 0) |
| 678 | { |
| 679 | home_dir = strdup (p->pw_dir); |
| 680 | malloc_home_dir = 1; |
| 681 | } |
| 682 | scratch_buffer_free (&s); |
| 683 | if (err == 0 && home_dir == NULL) |
| 684 | { |
| 685 | retval = GLOB_NOSPACE; |
| 686 | goto out; |
| 687 | } |
| 688 | #endif /* WINDOWS32 */ |
| 689 | } |
| 690 | if (home_dir == NULL || home_dir[0] == '\0') |
| 691 | { |
| 692 | if (__glibc_unlikely (malloc_home_dir)) |
| 693 | free (home_dir); |
| 694 | if (flags & GLOB_TILDE_CHECK) |
| 695 | { |
| 696 | retval = GLOB_NOMATCH; |
| 697 | goto out; |
| 698 | } |
| 699 | else |
| 700 | { |
| 701 | home_dir = (char *) "~"; /* No luck. */ |
| 702 | malloc_home_dir = 0; |
| 703 | } |
| 704 | } |
| 705 | /* Now construct the full directory. */ |
| 706 | if (dirname[1] == '\0') |
| 707 | { |
| 708 | if (__glibc_unlikely (malloc_dirname)) |
| 709 | free (dirname); |
| 710 | |
| 711 | dirname = home_dir; |
| 712 | dirlen = strlen (dirname); |
| 713 | malloc_dirname = malloc_home_dir; |
| 714 | } |
| 715 | else |
| 716 | { |
| 717 | char *newp; |
| 718 | size_t home_len = strlen (home_dir); |
| 719 | int use_alloca = glob_use_alloca (alloca_used, home_len + dirlen); |
| 720 | if (use_alloca) |
| 721 | newp = alloca_account (home_len + dirlen, alloca_used); |
| 722 | else |
| 723 | { |
| 724 | newp = malloc (home_len + dirlen); |
| 725 | if (newp == NULL) |
| 726 | { |
| 727 | if (__glibc_unlikely (malloc_home_dir)) |
| 728 | free (home_dir); |
| 729 | retval = GLOB_NOSPACE; |
| 730 | goto out; |
| 731 | } |
| 732 | } |
| 733 | |
| 734 | mempcpy (mempcpy (newp, home_dir, home_len), |
| 735 | &dirname[1], dirlen); |
| 736 | |
| 737 | if (__glibc_unlikely (malloc_dirname)) |
| 738 | free (dirname); |
| 739 | |
| 740 | dirname = newp; |
| 741 | dirlen += home_len - 1; |
| 742 | malloc_dirname = !use_alloca; |
| 743 | |
| 744 | if (__glibc_unlikely (malloc_home_dir)) |
| 745 | free (home_dir); |
| 746 | } |
| 747 | dirname_modified = 1; |
| 748 | } |
| 749 | else |
| 750 | { |
| 751 | #ifndef WINDOWS32 |
| 752 | char *end_name = strchr (dirname, '/'); |
| 753 | char *user_name; |
| 754 | int malloc_user_name = 0; |
| 755 | char *unescape = NULL; |
| 756 | |
| 757 | if (!(flags & GLOB_NOESCAPE)) |
| 758 | { |
| 759 | if (end_name == NULL) |
| 760 | { |
| 761 | unescape = strchr (dirname, '\\'); |
| 762 | if (unescape) |
| 763 | end_name = strchr (unescape, '\0'); |
| 764 | } |
| 765 | else |
| 766 | unescape = memchr (dirname, '\\', end_name - dirname); |
| 767 | } |
| 768 | if (end_name == NULL) |
| 769 | user_name = dirname + 1; |
| 770 | else |
| 771 | { |
| 772 | char *newp; |
| 773 | if (glob_use_alloca (alloca_used, end_name - dirname)) |
| 774 | newp = alloca_account (end_name - dirname, alloca_used); |
| 775 | else |
| 776 | { |
| 777 | newp = malloc (end_name - dirname); |
| 778 | if (newp == NULL) |
| 779 | { |
| 780 | retval = GLOB_NOSPACE; |
| 781 | goto out; |
| 782 | } |
| 783 | malloc_user_name = 1; |
| 784 | } |
| 785 | if (unescape != NULL) |
| 786 | { |
| 787 | char *p = mempcpy (newp, dirname + 1, |
| 788 | unescape - dirname - 1); |
| 789 | char *q = unescape; |
| 790 | while (q != end_name) |
| 791 | { |
| 792 | if (*q == '\\') |
| 793 | { |
| 794 | if (q + 1 == end_name) |
| 795 | { |
| 796 | /* "~fo\\o\\" unescape to user_name "foo\\", |
| 797 | but "~fo\\o\\/" unescape to user_name |
| 798 | "foo". */ |
| 799 | if (filename == NULL) |
| 800 | *p++ = '\\'; |
| 801 | break; |
| 802 | } |
| 803 | ++q; |
| 804 | } |
| 805 | *p++ = *q++; |
| 806 | } |
| 807 | *p = '\0'; |
| 808 | } |
| 809 | else |
| 810 | *((char *) mempcpy (newp, dirname + 1, end_name - dirname - 1)) |
| 811 | = '\0'; |
| 812 | user_name = newp; |
| 813 | } |
| 814 | |
| 815 | /* Look up specific user's home directory. */ |
| 816 | { |
| 817 | struct passwd *p; |
| 818 | struct scratch_buffer pwtmpbuf; |
| 819 | scratch_buffer_init (&pwtmpbuf); |
| 820 | |
| 821 | # if defined HAVE_GETPWNAM_R || defined _LIBC |
| 822 | struct passwd pwbuf; |
| 823 | |
| 824 | while (getpwnam_r (user_name, &pwbuf, |
| 825 | pwtmpbuf.data, pwtmpbuf.length, &p) |
| 826 | == ERANGE) |
| 827 | { |
| 828 | if (!scratch_buffer_grow (&pwtmpbuf)) |
| 829 | { |
| 830 | retval = GLOB_NOSPACE; |
| 831 | goto out; |
| 832 | } |
| 833 | } |
| 834 | # else |
| 835 | p = getpwnam (user_name); |
| 836 | # endif |
| 837 | |
| 838 | if (__glibc_unlikely (malloc_user_name)) |
| 839 | free (user_name); |
| 840 | |
| 841 | /* If we found a home directory use this. */ |
| 842 | if (p != NULL) |
| 843 | { |
| 844 | size_t home_len = strlen (p->pw_dir); |
| 845 | size_t rest_len = end_name == NULL ? 0 : strlen (end_name); |
| 846 | /* dirname contains end_name; we can't free it now. */ |
| 847 | char *prev_dirname = |
| 848 | (__glibc_unlikely (malloc_dirname) ? dirname : NULL); |
| 849 | char *d; |
| 850 | |
| 851 | malloc_dirname = 0; |
| 852 | |
| 853 | if (glob_use_alloca (alloca_used, home_len + rest_len + 1)) |
| 854 | dirname = alloca_account (home_len + rest_len + 1, |
| 855 | alloca_used); |
| 856 | else |
| 857 | { |
| 858 | dirname = malloc (home_len + rest_len + 1); |
| 859 | if (dirname == NULL) |
| 860 | { |
| 861 | free (prev_dirname); |
| 862 | scratch_buffer_free (&pwtmpbuf); |
| 863 | retval = GLOB_NOSPACE; |
| 864 | goto out; |
| 865 | } |
| 866 | malloc_dirname = 1; |
| 867 | } |
| 868 | d = mempcpy (dirname, p->pw_dir, home_len); |
| 869 | if (end_name != NULL) |
| 870 | d = mempcpy (d, end_name, rest_len); |
| 871 | *d = '\0'; |
| 872 | |
| 873 | free (prev_dirname); |
| 874 | |
| 875 | dirlen = home_len + rest_len; |
| 876 | dirname_modified = 1; |
| 877 | } |
| 878 | else |
| 879 | { |
| 880 | if (flags & GLOB_TILDE_CHECK) |
| 881 | { |
| 882 | /* We have to regard it as an error if we cannot find the |
| 883 | home directory. */ |
| 884 | retval = GLOB_NOMATCH; |
| 885 | goto out; |
| 886 | } |
| 887 | } |
| 888 | scratch_buffer_free (&pwtmpbuf); |
| 889 | } |
| 890 | #endif /* !WINDOWS32 */ |
| 891 | } |
| 892 | } |
| 893 | |
| 894 | /* Now test whether we looked for "~" or "~NAME". In this case we |
| 895 | can give the answer now. */ |
| 896 | if (filename == NULL) |
| 897 | { |
| 898 | size_t newcount = pglob->gl_pathc + pglob->gl_offs; |
| 899 | char **new_gl_pathv; |
| 900 | |
| 901 | if (newcount > SIZE_MAX / sizeof (char *) - 2) |
| 902 | { |
| 903 | nospace: |
| 904 | free (pglob->gl_pathv); |
| 905 | pglob->gl_pathv = NULL; |
| 906 | pglob->gl_pathc = 0; |
| 907 | retval = GLOB_NOSPACE; |
| 908 | goto out; |
| 909 | } |
| 910 | |
| 911 | new_gl_pathv = realloc (pglob->gl_pathv, |
| 912 | (newcount + 2) * sizeof (char *)); |
| 913 | if (new_gl_pathv == NULL) |
| 914 | goto nospace; |
| 915 | pglob->gl_pathv = new_gl_pathv; |
| 916 | |
| 917 | if (flags & GLOB_MARK && is_dir (dirname, flags, pglob)) |
| 918 | { |
| 919 | char *p; |
| 920 | pglob->gl_pathv[newcount] = malloc (dirlen + 2); |
| 921 | if (pglob->gl_pathv[newcount] == NULL) |
| 922 | goto nospace; |
| 923 | p = mempcpy (pglob->gl_pathv[newcount], dirname, dirlen); |
| 924 | p[0] = '/'; |
| 925 | p[1] = '\0'; |
| 926 | if (__glibc_unlikely (malloc_dirname)) |
| 927 | free (dirname); |
| 928 | } |
| 929 | else |
| 930 | { |
| 931 | if (__glibc_unlikely (malloc_dirname)) |
| 932 | pglob->gl_pathv[newcount] = dirname; |
| 933 | else |
| 934 | { |
| 935 | pglob->gl_pathv[newcount] = strdup (dirname); |
| 936 | if (pglob->gl_pathv[newcount] == NULL) |
| 937 | goto nospace; |
| 938 | } |
| 939 | } |
| 940 | pglob->gl_pathv[++newcount] = NULL; |
| 941 | ++pglob->gl_pathc; |
| 942 | pglob->gl_flags = flags; |
| 943 | |
| 944 | return 0; |
| 945 | } |
| 946 | |
| 947 | meta = __glob_pattern_type (dirname, !(flags & GLOB_NOESCAPE)); |
| 948 | /* meta is 1 if correct glob pattern containing metacharacters. |
| 949 | If meta has bit (1 << 2) set, it means there was an unterminated |
| 950 | [ which we handle the same, using fnmatch. Broken unterminated |
| 951 | pattern bracket expressions ought to be rare enough that it is |
| 952 | not worth special casing them, fnmatch will do the right thing. */ |
| 953 | if (meta & (GLOBPAT_SPECIAL | GLOBPAT_BRACKET)) |
| 954 | { |
| 955 | /* The directory name contains metacharacters, so we |
| 956 | have to glob for the directory, and then glob for |
| 957 | the pattern in each directory found. */ |
| 958 | size_t i; |
| 959 | |
| 960 | if (!(flags & GLOB_NOESCAPE) && dirlen > 0 && dirname[dirlen - 1] == '\\') |
| 961 | { |
| 962 | /* "foo\\/bar". Remove the final backslash from dirname |
| 963 | if it has not been quoted. */ |
| 964 | char *p = (char *) &dirname[dirlen - 1]; |
| 965 | |
| 966 | while (p > dirname && p[-1] == '\\') --p; |
| 967 | if ((&dirname[dirlen] - p) & 1) |
| 968 | *(char *) &dirname[--dirlen] = '\0'; |
| 969 | } |
| 970 | |
| 971 | if (__glibc_unlikely ((flags & GLOB_ALTDIRFUNC) != 0)) |
| 972 | { |
| 973 | /* Use the alternative access functions also in the recursive |
| 974 | call. */ |
| 975 | dirs.gl_opendir = pglob->gl_opendir; |
| 976 | dirs.gl_readdir = pglob->gl_readdir; |
| 977 | dirs.gl_closedir = pglob->gl_closedir; |
| 978 | dirs.gl_stat = pglob->gl_stat; |
| 979 | dirs.gl_lstat = pglob->gl_lstat; |
| 980 | } |
| 981 | |
| 982 | status = __glob (dirname, |
| 983 | ((flags & (GLOB_ERR | GLOB_NOESCAPE | GLOB_ALTDIRFUNC)) |
| 984 | | GLOB_NOSORT | GLOB_ONLYDIR), |
| 985 | errfunc, &dirs); |
| 986 | if (status != 0) |
| 987 | { |
| 988 | if ((flags & GLOB_NOCHECK) == 0 || status != GLOB_NOMATCH) |
| 989 | { |
| 990 | retval = status; |
| 991 | goto out; |
| 992 | } |
| 993 | goto no_matches; |
| 994 | } |
| 995 | |
| 996 | /* We have successfully globbed the preceding directory name. |
| 997 | For each name we found, call glob_in_dir on it and FILENAME, |
| 998 | appending the results to PGLOB. */ |
| 999 | for (i = 0; i < dirs.gl_pathc; ++i) |
| 1000 | { |
| 1001 | size_t old_pathc; |
| 1002 | |
| 1003 | old_pathc = pglob->gl_pathc; |
| 1004 | status = glob_in_dir (filename, dirs.gl_pathv[i], |
| 1005 | ((flags | GLOB_APPEND) |
| 1006 | & ~(GLOB_NOCHECK | GLOB_NOMAGIC)), |
| 1007 | errfunc, pglob, alloca_used); |
| 1008 | if (status == GLOB_NOMATCH) |
| 1009 | /* No matches in this directory. Try the next. */ |
| 1010 | continue; |
| 1011 | |
| 1012 | if (status != 0) |
| 1013 | { |
| 1014 | globfree (&dirs); |
| 1015 | globfree (pglob); |
| 1016 | pglob->gl_pathc = 0; |
| 1017 | retval = status; |
| 1018 | goto out; |
| 1019 | } |
| 1020 | |
| 1021 | /* Stick the directory on the front of each name. */ |
| 1022 | if (prefix_array (dirs.gl_pathv[i], |
| 1023 | &pglob->gl_pathv[old_pathc + pglob->gl_offs], |
| 1024 | pglob->gl_pathc - old_pathc)) |
| 1025 | { |
| 1026 | globfree (&dirs); |
| 1027 | globfree (pglob); |
| 1028 | pglob->gl_pathc = 0; |
| 1029 | retval = GLOB_NOSPACE; |
| 1030 | goto out; |
| 1031 | } |
| 1032 | } |
| 1033 | |
| 1034 | flags |= GLOB_MAGCHAR; |
| 1035 | |
| 1036 | /* We have ignored the GLOB_NOCHECK flag in the 'glob_in_dir' calls. |
| 1037 | But if we have not found any matching entry and the GLOB_NOCHECK |
| 1038 | flag was set we must return the input pattern itself. */ |
| 1039 | if (pglob->gl_pathc + pglob->gl_offs == oldcount) |
| 1040 | { |
| 1041 | no_matches: |
| 1042 | /* No matches. */ |
| 1043 | if (flags & GLOB_NOCHECK) |
| 1044 | { |
| 1045 | size_t newcount = pglob->gl_pathc + pglob->gl_offs; |
| 1046 | char **new_gl_pathv; |
| 1047 | |
| 1048 | if (newcount > SIZE_MAX / sizeof (char *) - 2) |
| 1049 | { |
| 1050 | nospace2: |
| 1051 | globfree (&dirs); |
| 1052 | retval = GLOB_NOSPACE; |
| 1053 | goto out; |
| 1054 | } |
| 1055 | |
| 1056 | new_gl_pathv = realloc (pglob->gl_pathv, |
| 1057 | (newcount + 2) * sizeof (char *)); |
| 1058 | if (new_gl_pathv == NULL) |
| 1059 | goto nospace2; |
| 1060 | pglob->gl_pathv = new_gl_pathv; |
| 1061 | |
| 1062 | pglob->gl_pathv[newcount] = strdup (pattern); |
| 1063 | if (pglob->gl_pathv[newcount] == NULL) |
| 1064 | { |
| 1065 | globfree (&dirs); |
| 1066 | globfree (pglob); |
| 1067 | pglob->gl_pathc = 0; |
| 1068 | retval = GLOB_NOSPACE; |
| 1069 | goto out; |
| 1070 | } |
| 1071 | |
| 1072 | ++pglob->gl_pathc; |
| 1073 | ++newcount; |
| 1074 | |
| 1075 | pglob->gl_pathv[newcount] = NULL; |
| 1076 | pglob->gl_flags = flags; |
| 1077 | } |
| 1078 | else |
| 1079 | { |
| 1080 | globfree (&dirs); |
| 1081 | retval = GLOB_NOMATCH; |
| 1082 | goto out; |
| 1083 | } |
| 1084 | } |
| 1085 | |
| 1086 | globfree (&dirs); |
| 1087 | } |
| 1088 | else |
| 1089 | { |
| 1090 | size_t old_pathc = pglob->gl_pathc; |
| 1091 | int orig_flags = flags; |
| 1092 | |
| 1093 | if (meta & GLOBPAT_BACKSLASH) |
| 1094 | { |
| 1095 | char *p = strchr (dirname, '\\'), *q; |
| 1096 | /* We need to unescape the dirname string. It is certainly |
| 1097 | allocated by alloca, as otherwise filename would be NULL |
| 1098 | or dirname wouldn't contain backslashes. */ |
| 1099 | q = p; |
| 1100 | do |
| 1101 | { |
| 1102 | if (*p == '\\') |
| 1103 | { |
| 1104 | *q = *++p; |
| 1105 | --dirlen; |
| 1106 | } |
| 1107 | else |
| 1108 | *q = *p; |
| 1109 | ++q; |
| 1110 | } |
| 1111 | while (*p++ != '\0'); |
| 1112 | dirname_modified = 1; |
| 1113 | } |
| 1114 | if (dirname_modified) |
| 1115 | flags &= ~(GLOB_NOCHECK | GLOB_NOMAGIC); |
| 1116 | status = glob_in_dir (filename, dirname, flags, errfunc, pglob, |
| 1117 | alloca_used); |
| 1118 | if (status != 0) |
| 1119 | { |
| 1120 | if (status == GLOB_NOMATCH && flags != orig_flags |
| 1121 | && pglob->gl_pathc + pglob->gl_offs == oldcount) |
| 1122 | { |
| 1123 | /* Make sure globfree (&dirs); is a nop. */ |
| 1124 | dirs.gl_pathv = NULL; |
| 1125 | flags = orig_flags; |
| 1126 | goto no_matches; |
| 1127 | } |
| 1128 | retval = status; |
| 1129 | goto out; |
| 1130 | } |
| 1131 | |
| 1132 | if (dirlen > 0) |
| 1133 | { |
| 1134 | /* Stick the directory on the front of each name. */ |
| 1135 | if (prefix_array (dirname, |
| 1136 | &pglob->gl_pathv[old_pathc + pglob->gl_offs], |
| 1137 | pglob->gl_pathc - old_pathc)) |
| 1138 | { |
| 1139 | globfree (pglob); |
| 1140 | pglob->gl_pathc = 0; |
| 1141 | retval = GLOB_NOSPACE; |
| 1142 | goto out; |
| 1143 | } |
| 1144 | } |
| 1145 | } |
| 1146 | |
| 1147 | if (flags & GLOB_MARK) |
| 1148 | { |
| 1149 | /* Append slashes to directory names. */ |
| 1150 | size_t i; |
| 1151 | |
| 1152 | for (i = oldcount; i < pglob->gl_pathc + pglob->gl_offs; ++i) |
| 1153 | if (is_dir (pglob->gl_pathv[i], flags, pglob)) |
| 1154 | { |
| 1155 | size_t len = strlen (pglob->gl_pathv[i]) + 2; |
| 1156 | char *new = realloc (pglob->gl_pathv[i], len); |
| 1157 | if (new == NULL) |
| 1158 | { |
| 1159 | globfree (pglob); |
| 1160 | pglob->gl_pathc = 0; |
| 1161 | retval = GLOB_NOSPACE; |
| 1162 | goto out; |
| 1163 | } |
| 1164 | strcpy (&new[len - 2], "/"); |
| 1165 | pglob->gl_pathv[i] = new; |
| 1166 | } |
| 1167 | } |
| 1168 | |
| 1169 | if (!(flags & GLOB_NOSORT)) |
| 1170 | { |
| 1171 | /* Sort the vector. */ |
| 1172 | qsort (&pglob->gl_pathv[oldcount], |
| 1173 | pglob->gl_pathc + pglob->gl_offs - oldcount, |
| 1174 | sizeof (char *), collated_compare); |
| 1175 | } |
| 1176 | |
| 1177 | out: |
| 1178 | if (__glibc_unlikely (malloc_dirname)) |
| 1179 | free (dirname); |
| 1180 | |
| 1181 | return retval; |
| 1182 | } |
| 1183 | #if defined _LIBC && !defined __glob |
| 1184 | versioned_symbol (libc, __glob, glob, GLIBC_2_27); |
| 1185 | libc_hidden_ver (__glob, glob) |
| 1186 | #endif |
| 1187 | |
| 1188 | |
| 1189 | /* Do a collated comparison of A and B. */ |
| 1190 | static int |
| 1191 | collated_compare (const void *a, const void *b) |
| 1192 | { |
| 1193 | char *const *ps1 = a; char *s1 = *ps1; |
| 1194 | char *const *ps2 = b; char *s2 = *ps2; |
| 1195 | |
| 1196 | if (s1 == s2) |
| 1197 | return 0; |
| 1198 | if (s1 == NULL) |
| 1199 | return 1; |
| 1200 | if (s2 == NULL) |
| 1201 | return -1; |
| 1202 | return strcoll (s1, s2); |
| 1203 | } |
| 1204 | |
| 1205 | |
| 1206 | /* Prepend DIRNAME to each of N members of ARRAY, replacing ARRAY's |
| 1207 | elements in place. Return nonzero if out of memory, zero if successful. |
| 1208 | A slash is inserted between DIRNAME and each elt of ARRAY, |
| 1209 | unless DIRNAME is just "/". Each old element of ARRAY is freed. */ |
| 1210 | static int |
| 1211 | prefix_array (const char *dirname, char **array, size_t n) |
| 1212 | { |
| 1213 | size_t i; |
| 1214 | size_t dirlen = strlen (dirname); |
| 1215 | char dirsep_char = '/'; |
| 1216 | |
| 1217 | if (dirlen == 1 && dirname[0] == '/') |
| 1218 | /* DIRNAME is just "/", so normal prepending would get us "//foo". |
| 1219 | We want "/foo" instead, so don't prepend any chars from DIRNAME. */ |
| 1220 | dirlen = 0; |
| 1221 | |
| 1222 | #if defined __MSDOS__ || defined WINDOWS32 |
| 1223 | if (dirlen > 1) |
| 1224 | { |
| 1225 | if (dirname[dirlen - 1] == '/' && dirname[dirlen - 2] == ':') |
| 1226 | /* DIRNAME is "d:/". Don't prepend the slash from DIRNAME. */ |
| 1227 | --dirlen; |
| 1228 | else if (dirname[dirlen - 1] == ':') |
| 1229 | { |
| 1230 | /* DIRNAME is "d:". Use ':' instead of '/'. */ |
| 1231 | --dirlen; |
| 1232 | dirsep_char = ':'; |
| 1233 | } |
| 1234 | } |
| 1235 | #endif |
| 1236 | |
| 1237 | for (i = 0; i < n; ++i) |
| 1238 | { |
| 1239 | size_t eltlen = strlen (array[i]) + 1; |
| 1240 | char *new = malloc (dirlen + 1 + eltlen); |
| 1241 | if (new == NULL) |
| 1242 | { |
| 1243 | while (i > 0) |
| 1244 | free (array[--i]); |
| 1245 | return 1; |
| 1246 | } |
| 1247 | |
| 1248 | { |
| 1249 | char *endp = mempcpy (new, dirname, dirlen); |
| 1250 | *endp++ = dirsep_char; |
| 1251 | mempcpy (endp, array[i], eltlen); |
| 1252 | } |
| 1253 | free (array[i]); |
| 1254 | array[i] = new; |
| 1255 | } |
| 1256 | |
| 1257 | return 0; |
| 1258 | } |
| 1259 | |
| 1260 | /* Like 'glob', but PATTERN is a final pathname component, |
| 1261 | and matches are searched for in DIRECTORY. |
| 1262 | The GLOB_NOSORT bit in FLAGS is ignored. No sorting is ever done. |
| 1263 | The GLOB_APPEND flag is assumed to be set (always appends). */ |
| 1264 | static int |
| 1265 | glob_in_dir (const char *pattern, const char *directory, int flags, |
| 1266 | int (*errfunc) (const char *, int), |
| 1267 | glob_t *pglob, size_t alloca_used) |
| 1268 | { |
| 1269 | size_t dirlen = strlen (directory); |
| 1270 | void *stream = NULL; |
| 1271 | # define GLOBNAMES_MEMBERS(nnames) \ |
| 1272 | struct globnames *next; size_t count; char *name[nnames]; |
| 1273 | struct globnames { GLOBNAMES_MEMBERS (FLEXIBLE_ARRAY_MEMBER) }; |
| 1274 | struct { GLOBNAMES_MEMBERS (64) } init_names_buf; |
| 1275 | struct globnames *init_names = (struct globnames *) &init_names_buf; |
| 1276 | struct globnames *names = init_names; |
| 1277 | struct globnames *names_alloca = init_names; |
| 1278 | size_t nfound = 0; |
| 1279 | size_t cur = 0; |
| 1280 | int meta; |
| 1281 | int save; |
| 1282 | int result; |
| 1283 | |
| 1284 | alloca_used += sizeof init_names_buf; |
| 1285 | |
| 1286 | init_names->next = NULL; |
| 1287 | init_names->count = ((sizeof init_names_buf |
| 1288 | - offsetof (struct globnames, name)) |
| 1289 | / sizeof init_names->name[0]); |
| 1290 | |
| 1291 | meta = __glob_pattern_type (pattern, !(flags & GLOB_NOESCAPE)); |
| 1292 | if (meta == GLOBPAT_NONE && (flags & (GLOB_NOCHECK|GLOB_NOMAGIC))) |
| 1293 | { |
| 1294 | /* We need not do any tests. The PATTERN contains no meta |
| 1295 | characters and we must not return an error therefore the |
| 1296 | result will always contain exactly one name. */ |
| 1297 | flags |= GLOB_NOCHECK; |
| 1298 | } |
| 1299 | else if (meta == GLOBPAT_NONE) |
| 1300 | { |
| 1301 | size_t patlen = strlen (pattern); |
| 1302 | size_t fullsize; |
| 1303 | bool alloca_fullname |
| 1304 | = (! size_add_wrapv (dirlen + 1, patlen + 1, &fullsize) |
| 1305 | && glob_use_alloca (alloca_used, fullsize)); |
| 1306 | char *fullname; |
| 1307 | if (alloca_fullname) |
| 1308 | fullname = alloca_account (fullsize, alloca_used); |
| 1309 | else |
| 1310 | { |
| 1311 | fullname = malloc (fullsize); |
| 1312 | if (fullname == NULL) |
| 1313 | return GLOB_NOSPACE; |
| 1314 | } |
| 1315 | |
| 1316 | mempcpy (mempcpy (mempcpy (fullname, directory, dirlen), |
| 1317 | "/", 1), |
| 1318 | pattern, patlen + 1); |
| 1319 | if (glob_lstat (pglob, flags, fullname) == 0 |
| 1320 | || errno == EOVERFLOW) |
| 1321 | /* We found this file to be existing. Now tell the rest |
| 1322 | of the function to copy this name into the result. */ |
| 1323 | flags |= GLOB_NOCHECK; |
| 1324 | |
| 1325 | if (__glibc_unlikely (!alloca_fullname)) |
| 1326 | free (fullname); |
| 1327 | } |
| 1328 | else |
| 1329 | { |
| 1330 | stream = (__builtin_expect (flags & GLOB_ALTDIRFUNC, 0) |
| 1331 | ? (*pglob->gl_opendir) (directory) |
| 1332 | : opendir (directory)); |
| 1333 | if (stream == NULL) |
| 1334 | { |
| 1335 | if (errno != ENOTDIR |
| 1336 | && ((errfunc != NULL && (*errfunc) (directory, errno)) |
| 1337 | || (flags & GLOB_ERR))) |
| 1338 | return GLOB_ABORTED; |
| 1339 | } |
| 1340 | else |
| 1341 | { |
| 1342 | int fnm_flags = ((!(flags & GLOB_PERIOD) ? FNM_PERIOD : 0) |
| 1343 | | ((flags & GLOB_NOESCAPE) ? FNM_NOESCAPE : 0)); |
| 1344 | flags |= GLOB_MAGCHAR; |
| 1345 | |
| 1346 | while (1) |
| 1347 | { |
| 1348 | struct readdir_result d; |
| 1349 | { |
| 1350 | if (__builtin_expect (flags & GLOB_ALTDIRFUNC, 0)) |
| 1351 | d = convert_dirent (GL_READDIR (pglob, stream)); |
| 1352 | else |
| 1353 | { |
| 1354 | #ifdef COMPILE_GLOB64 |
| 1355 | d = convert_dirent (__readdir (stream)); |
| 1356 | #else |
| 1357 | d = convert_dirent64 (__readdir64 (stream)); |
| 1358 | #endif |
| 1359 | } |
| 1360 | } |
| 1361 | if (d.name == NULL) |
| 1362 | break; |
| 1363 | |
| 1364 | /* If we shall match only directories use the information |
| 1365 | provided by the dirent call if possible. */ |
| 1366 | if (flags & GLOB_ONLYDIR) |
| 1367 | switch (readdir_result_type (d)) |
| 1368 | { |
| 1369 | case DT_DIR: case DT_LNK: case DT_UNKNOWN: break; |
| 1370 | default: continue; |
| 1371 | } |
| 1372 | |
| 1373 | if (fnmatch (pattern, d.name, fnm_flags) == 0) |
| 1374 | { |
| 1375 | if (cur == names->count) |
| 1376 | { |
| 1377 | struct globnames *newnames; |
| 1378 | size_t count = names->count * 2; |
| 1379 | size_t nameoff = offsetof (struct globnames, name); |
| 1380 | size_t size = FLEXSIZEOF (struct globnames, name, |
| 1381 | count * sizeof (char *)); |
| 1382 | if ((SIZE_MAX - nameoff) / 2 / sizeof (char *) |
| 1383 | < names->count) |
| 1384 | goto memory_error; |
| 1385 | if (glob_use_alloca (alloca_used, size)) |
| 1386 | newnames = names_alloca |
| 1387 | = alloca_account (size, alloca_used); |
| 1388 | else if ((newnames = malloc (size)) |
| 1389 | == NULL) |
| 1390 | goto memory_error; |
| 1391 | newnames->count = count; |
| 1392 | newnames->next = names; |
| 1393 | names = newnames; |
| 1394 | cur = 0; |
| 1395 | } |
| 1396 | names->name[cur] = strdup (d.name); |
| 1397 | if (names->name[cur] == NULL) |
| 1398 | goto memory_error; |
| 1399 | ++cur; |
| 1400 | ++nfound; |
| 1401 | if (SIZE_MAX - pglob->gl_offs <= nfound) |
| 1402 | goto memory_error; |
| 1403 | } |
| 1404 | } |
| 1405 | } |
| 1406 | } |
| 1407 | |
| 1408 | if (nfound == 0 && (flags & GLOB_NOCHECK)) |
| 1409 | { |
| 1410 | size_t len = strlen (pattern); |
| 1411 | nfound = 1; |
| 1412 | names->name[cur] = malloc (len + 1); |
| 1413 | if (names->name[cur] == NULL) |
| 1414 | goto memory_error; |
| 1415 | *((char *) mempcpy (names->name[cur++], pattern, len)) = '\0'; |
| 1416 | } |
| 1417 | |
| 1418 | result = GLOB_NOMATCH; |
| 1419 | if (nfound != 0) |
| 1420 | { |
| 1421 | char **new_gl_pathv; |
| 1422 | result = 0; |
| 1423 | |
| 1424 | if (SIZE_MAX / sizeof (char *) - pglob->gl_pathc |
| 1425 | < pglob->gl_offs + nfound + 1) |
| 1426 | goto memory_error; |
| 1427 | |
| 1428 | new_gl_pathv |
| 1429 | = realloc (pglob->gl_pathv, |
| 1430 | (pglob->gl_pathc + pglob->gl_offs + nfound + 1) |
| 1431 | * sizeof (char *)); |
| 1432 | |
| 1433 | if (new_gl_pathv == NULL) |
| 1434 | { |
| 1435 | memory_error: |
| 1436 | while (1) |
| 1437 | { |
| 1438 | struct globnames *old = names; |
| 1439 | for (size_t i = 0; i < cur; ++i) |
| 1440 | free (names->name[i]); |
| 1441 | names = names->next; |
| 1442 | /* NB: we will not leak memory here if we exit without |
| 1443 | freeing the current block assigned to OLD. At least |
| 1444 | the very first block is always allocated on the stack |
| 1445 | and this is the block assigned to OLD here. */ |
| 1446 | if (names == NULL) |
| 1447 | { |
| 1448 | assert (old == init_names); |
| 1449 | break; |
| 1450 | } |
| 1451 | cur = names->count; |
| 1452 | if (old == names_alloca) |
| 1453 | names_alloca = names; |
| 1454 | else |
| 1455 | free (old); |
| 1456 | } |
| 1457 | result = GLOB_NOSPACE; |
| 1458 | } |
| 1459 | else |
| 1460 | { |
| 1461 | while (1) |
| 1462 | { |
| 1463 | struct globnames *old = names; |
| 1464 | for (size_t i = 0; i < cur; ++i) |
| 1465 | new_gl_pathv[pglob->gl_offs + pglob->gl_pathc++] |
| 1466 | = names->name[i]; |
| 1467 | names = names->next; |
| 1468 | /* NB: we will not leak memory here if we exit without |
| 1469 | freeing the current block assigned to OLD. At least |
| 1470 | the very first block is always allocated on the stack |
| 1471 | and this is the block assigned to OLD here. */ |
| 1472 | if (names == NULL) |
| 1473 | { |
| 1474 | assert (old == init_names); |
| 1475 | break; |
| 1476 | } |
| 1477 | cur = names->count; |
| 1478 | if (old == names_alloca) |
| 1479 | names_alloca = names; |
| 1480 | else |
| 1481 | free (old); |
| 1482 | } |
| 1483 | |
| 1484 | pglob->gl_pathv = new_gl_pathv; |
| 1485 | |
| 1486 | pglob->gl_pathv[pglob->gl_offs + pglob->gl_pathc] = NULL; |
| 1487 | |
| 1488 | pglob->gl_flags = flags; |
| 1489 | } |
| 1490 | } |
| 1491 | |
| 1492 | if (stream != NULL) |
| 1493 | { |
| 1494 | save = errno; |
| 1495 | if (__glibc_unlikely (flags & GLOB_ALTDIRFUNC)) |
| 1496 | (*pglob->gl_closedir) (stream); |
| 1497 | else |
| 1498 | closedir (stream); |
| 1499 | __set_errno (save); |
| 1500 | } |
| 1501 | |
| 1502 | return result; |
| 1503 | } |