1 | /* Copyright (C) 1991-2019 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 Lesser General Public |
6 | License as published by the Free Software Foundation; either |
7 | version 2.1 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 | Lesser General Public License for more details. |
13 | |
14 | You should have received a copy of the GNU Lesser General Public |
15 | License along with the GNU C Library; if not, see |
16 | <http://www.gnu.org/licenses/>. */ |
17 | |
18 | #include <glob.h> |
19 | |
20 | #include <errno.h> |
21 | #include <sys/types.h> |
22 | #include <sys/stat.h> |
23 | #include <stdbool.h> |
24 | #include <stddef.h> |
25 | #include <stdint.h> |
26 | #include <assert.h> |
27 | #include <unistd.h> |
28 | |
29 | #if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__ |
30 | # define WINDOWS32 |
31 | #endif |
32 | |
33 | #ifndef WINDOWS32 |
34 | # include <pwd.h> |
35 | #endif |
36 | |
37 | #include <errno.h> |
38 | #include <dirent.h> |
39 | #include <stdlib.h> |
40 | #include <string.h> |
41 | #include <alloca.h> |
42 | |
43 | #ifdef _LIBC |
44 | # undef strdup |
45 | # define strdup(str) __strdup (str) |
46 | # define sysconf(id) __sysconf (id) |
47 | # define closedir(dir) __closedir (dir) |
48 | # define opendir(name) __opendir (name) |
49 | # define readdir(str) __readdir64 (str) |
50 | # define getpwnam_r(name, bufp, buf, len, res) \ |
51 | __getpwnam_r (name, bufp, buf, len, res) |
52 | # ifndef __lstat64 |
53 | # define __lstat64(fname, buf) __lxstat64 (_STAT_VER, fname, buf) |
54 | # endif |
55 | # ifndef __stat64 |
56 | # define __stat64(fname, buf) __xstat64 (_STAT_VER, fname, buf) |
57 | # endif |
58 | # define struct_stat64 struct stat64 |
59 | # define FLEXIBLE_ARRAY_MEMBER |
60 | # include <shlib-compat.h> |
61 | #else /* !_LIBC */ |
62 | # define __glob glob |
63 | # define __getlogin_r(buf, len) getlogin_r (buf, len) |
64 | # define __lstat64(fname, buf) lstat (fname, buf) |
65 | # define __stat64(fname, buf) stat (fname, buf) |
66 | # define __fxstatat64(_, d, f, st, flag) fstatat (d, f, st, flag) |
67 | # define struct_stat64 struct stat |
68 | # ifndef __MVS__ |
69 | # define __alloca alloca |
70 | # endif |
71 | # define __readdir readdir |
72 | # define COMPILE_GLOB64 |
73 | #endif /* _LIBC */ |
74 | |
75 | #include <fnmatch.h> |
76 | |
77 | #include <flexmember.h> |
78 | #include <glob_internal.h> |
79 | #include <scratch_buffer.h> |
80 | |
81 | static const char *next_brace_sub (const char *begin, int flags) __THROWNL; |
82 | |
83 | typedef uint_fast8_t dirent_type; |
84 | |
85 | #if !defined _LIBC && !defined HAVE_STRUCT_DIRENT_D_TYPE |
86 | /* Any distinct values will do here. |
87 | Undef any existing macros out of the way. */ |
88 | # undef DT_UNKNOWN |
89 | # undef DT_DIR |
90 | # undef DT_LNK |
91 | # define DT_UNKNOWN 0 |
92 | # define DT_DIR 1 |
93 | # define DT_LNK 2 |
94 | #endif |
95 | |
96 | /* A representation of a directory entry which does not depend on the |
97 | layout of struct dirent, or the size of ino_t. */ |
98 | struct readdir_result |
99 | { |
100 | const char *name; |
101 | #if defined _DIRENT_HAVE_D_TYPE || defined HAVE_STRUCT_DIRENT_D_TYPE |
102 | dirent_type type; |
103 | #endif |
104 | }; |
105 | |
106 | /* Initialize and return type member of struct readdir_result. */ |
107 | static dirent_type |
108 | readdir_result_type (struct readdir_result d) |
109 | { |
110 | #if defined _DIRENT_HAVE_D_TYPE || defined HAVE_STRUCT_DIRENT_D_TYPE |
111 | # define D_TYPE_TO_RESULT(source) (source)->d_type, |
112 | return d.type; |
113 | #else |
114 | # define D_TYPE_TO_RESULT(source) |
115 | return DT_UNKNOWN; |
116 | #endif |
117 | } |
118 | |
119 | /* Construct an initializer for a struct readdir_result object from a |
120 | struct dirent *. No copy of the name is made. */ |
121 | #define READDIR_RESULT_INITIALIZER(source) \ |
122 | { \ |
123 | source->d_name, \ |
124 | D_TYPE_TO_RESULT (source) \ |
125 | } |
126 | |
127 | /* Call gl_readdir on STREAM. This macro can be overridden to reduce |
128 | type safety if an old interface version needs to be supported. */ |
129 | #ifndef GL_READDIR |
130 | # define GL_READDIR(pglob, stream) ((pglob)->gl_readdir (stream)) |
131 | #endif |
132 | |
133 | /* Extract name and type from directory entry. No copy of the name is |
134 | made. If SOURCE is NULL, result name is NULL. Keep in sync with |
135 | convert_dirent64 below. */ |
136 | static struct readdir_result |
137 | convert_dirent (const struct dirent *source) |
138 | { |
139 | if (source == NULL) |
140 | { |
141 | struct readdir_result result = { NULL, }; |
142 | return result; |
143 | } |
144 | struct readdir_result result = READDIR_RESULT_INITIALIZER (source); |
145 | return result; |
146 | } |
147 | |
148 | #ifndef COMPILE_GLOB64 |
149 | /* Like convert_dirent, but works on struct dirent64 instead. Keep in |
150 | sync with convert_dirent above. */ |
151 | static struct readdir_result |
152 | convert_dirent64 (const struct dirent64 *source) |
153 | { |
154 | if (source == NULL) |
155 | { |
156 | struct readdir_result result = { NULL, }; |
157 | return result; |
158 | } |
159 | struct readdir_result result = READDIR_RESULT_INITIALIZER (source); |
160 | return result; |
161 | } |
162 | #endif |
163 | |
164 | #ifndef _LIBC |
165 | /* The results of opendir() in this file are not used with dirfd and fchdir, |
166 | and we do not leak fds to any single-threaded code that could use stdio, |
167 | therefore save some unnecessary recursion in fchdir.c and opendir_safer.c. |
168 | FIXME - if the kernel ever adds support for multi-thread safety for |
169 | avoiding standard fds, then we should use opendir_safer. */ |
170 | # ifdef GNULIB_defined_opendir |
171 | # undef opendir |
172 | # endif |
173 | # ifdef GNULIB_defined_closedir |
174 | # undef closedir |
175 | # endif |
176 | |
177 | /* Just use malloc. */ |
178 | # define __libc_use_alloca(n) false |
179 | # define alloca_account(len, avar) ((void) (len), (void) (avar), (void *) 0) |
180 | # define extend_alloca_account(buf, len, newlen, avar) \ |
181 | ((void) (buf), (void) (len), (void) (newlen), (void) (avar), (void *) 0) |
182 | #endif |
183 | |
184 | static int |
185 | glob_lstat (glob_t *pglob, int flags, const char *fullname) |
186 | { |
187 | /* Use on glob-lstat-compat.c to provide a compat symbol which does not |
188 | use lstat / gl_lstat. */ |
189 | #ifdef GLOB_NO_LSTAT |
190 | # define GL_LSTAT gl_stat |
191 | # define LSTAT64 __stat64 |
192 | #else |
193 | # define GL_LSTAT gl_lstat |
194 | # define LSTAT64 __lstat64 |
195 | #endif |
196 | |
197 | union |
198 | { |
199 | struct stat st; |
200 | struct_stat64 st64; |
201 | } ust; |
202 | return (__glibc_unlikely (flags & GLOB_ALTDIRFUNC) |
203 | ? pglob->GL_LSTAT (fullname, &ust.st) |
204 | : LSTAT64 (fullname, &ust.st64)); |
205 | } |
206 | |
207 | /* Set *R = A + B. Return true if the answer is mathematically |
208 | incorrect due to overflow; in this case, *R is the low order |
209 | bits of the correct answer. */ |
210 | |
211 | static bool |
212 | size_add_wrapv (size_t a, size_t b, size_t *r) |
213 | { |
214 | #if 5 <= __GNUC__ && !defined __ICC |
215 | return __builtin_add_overflow (a, b, r); |
216 | #else |
217 | *r = a + b; |
218 | return *r < a; |
219 | #endif |
220 | } |
221 | |
222 | static bool |
223 | glob_use_alloca (size_t alloca_used, size_t len) |
224 | { |
225 | size_t size; |
226 | return (!size_add_wrapv (alloca_used, len, &size) |
227 | && __libc_use_alloca (size)); |
228 | } |
229 | |
230 | static int glob_in_dir (const char *pattern, const char *directory, |
231 | int flags, int (*errfunc) (const char *, int), |
232 | glob_t *pglob, size_t alloca_used); |
233 | static int prefix_array (const char *prefix, char **array, size_t n) __THROWNL; |
234 | static int collated_compare (const void *, const void *) __THROWNL; |
235 | |
236 | |
237 | /* Return true if FILENAME is a directory or a symbolic link to a directory. |
238 | Use FLAGS and PGLOB to resolve the filename. */ |
239 | static bool |
240 | is_dir (char const *filename, int flags, glob_t const *pglob) |
241 | { |
242 | struct stat st; |
243 | struct_stat64 st64; |
244 | return (__glibc_unlikely (flags & GLOB_ALTDIRFUNC) |
245 | ? pglob->gl_stat (filename, &st) == 0 && S_ISDIR (st.st_mode) |
246 | : __stat64 (filename, &st64) == 0 && S_ISDIR (st64.st_mode)); |
247 | } |
248 | |
249 | /* Find the end of the sub-pattern in a brace expression. */ |
250 | static const char * |
251 | next_brace_sub (const char *cp, int flags) |
252 | { |
253 | size_t depth = 0; |
254 | while (*cp != '\0') |
255 | if ((flags & GLOB_NOESCAPE) == 0 && *cp == '\\') |
256 | { |
257 | if (*++cp == '\0') |
258 | break; |
259 | ++cp; |
260 | } |
261 | else |
262 | { |
263 | if ((*cp == '}' && depth-- == 0) || (*cp == ',' && depth == 0)) |
264 | break; |
265 | |
266 | if (*cp++ == '{') |
267 | depth++; |
268 | } |
269 | |
270 | return *cp != '\0' ? cp : NULL; |
271 | } |
272 | |
273 | #ifndef GLOB_ATTRIBUTE |
274 | # define GLOB_ATTRIBUTE |
275 | #endif |
276 | |
277 | /* Do glob searching for PATTERN, placing results in PGLOB. |
278 | The bits defined above may be set in FLAGS. |
279 | If a directory cannot be opened or read and ERRFUNC is not nil, |
280 | it is called with the pathname that caused the error, and the |
281 | 'errno' value from the failing call; if it returns non-zero |
282 | 'glob' returns GLOB_ABORTED; if it returns zero, the error is ignored. |
283 | If memory cannot be allocated for PGLOB, GLOB_NOSPACE is returned. |
284 | Otherwise, 'glob' returns zero. */ |
285 | int |
286 | GLOB_ATTRIBUTE |
287 | __glob (const char *pattern, int flags, int (*errfunc) (const char *, int), |
288 | glob_t *pglob) |
289 | { |
290 | const char *filename; |
291 | char *dirname = NULL; |
292 | size_t dirlen; |
293 | int status; |
294 | size_t oldcount; |
295 | int meta; |
296 | int dirname_modified; |
297 | int malloc_dirname = 0; |
298 | glob_t dirs; |
299 | int retval = 0; |
300 | size_t alloca_used = 0; |
301 | |
302 | if (pattern == NULL || pglob == NULL || (flags & ~__GLOB_FLAGS) != 0) |
303 | { |
304 | __set_errno (EINVAL); |
305 | return -1; |
306 | } |
307 | |
308 | /* POSIX requires all slashes to be matched. This means that with |
309 | a trailing slash we must match only directories. */ |
310 | if (pattern[0] && pattern[strlen (pattern) - 1] == '/') |
311 | flags |= GLOB_ONLYDIR; |
312 | |
313 | if (!(flags & GLOB_DOOFFS)) |
314 | /* Have to do this so 'globfree' knows where to start freeing. It |
315 | also makes all the code that uses gl_offs simpler. */ |
316 | pglob->gl_offs = 0; |
317 | |
318 | if (!(flags & GLOB_APPEND)) |
319 | { |
320 | pglob->gl_pathc = 0; |
321 | if (!(flags & GLOB_DOOFFS)) |
322 | pglob->gl_pathv = NULL; |
323 | else |
324 | { |
325 | size_t i; |
326 | |
327 | if (pglob->gl_offs >= ~((size_t) 0) / sizeof (char *)) |
328 | return GLOB_NOSPACE; |
329 | |
330 | pglob->gl_pathv = (char **) malloc ((pglob->gl_offs + 1) |
331 | * sizeof (char *)); |
332 | if (pglob->gl_pathv == NULL) |
333 | return GLOB_NOSPACE; |
334 | |
335 | for (i = 0; i <= pglob->gl_offs; ++i) |
336 | pglob->gl_pathv[i] = NULL; |
337 | } |
338 | } |
339 | |
340 | if (flags & GLOB_BRACE) |
341 | { |
342 | const char *begin; |
343 | |
344 | if (flags & GLOB_NOESCAPE) |
345 | begin = strchr (pattern, '{'); |
346 | else |
347 | { |
348 | begin = pattern; |
349 | while (1) |
350 | { |
351 | if (*begin == '\0') |
352 | { |
353 | begin = NULL; |
354 | break; |
355 | } |
356 | |
357 | if (*begin == '\\' && begin[1] != '\0') |
358 | ++begin; |
359 | else if (*begin == '{') |
360 | break; |
361 | |
362 | ++begin; |
363 | } |
364 | } |
365 | |
366 | if (begin != NULL) |
367 | { |
368 | /* Allocate working buffer large enough for our work. Note that |
369 | we have at least an opening and closing brace. */ |
370 | size_t firstc; |
371 | char *alt_start; |
372 | const char *p; |
373 | const char *next; |
374 | const char *rest; |
375 | size_t rest_len; |
376 | char *onealt; |
377 | size_t pattern_len = strlen (pattern) - 1; |
378 | int alloca_onealt = glob_use_alloca (alloca_used, pattern_len); |
379 | if (alloca_onealt) |
380 | onealt = alloca_account (pattern_len, alloca_used); |
381 | else |
382 | { |
383 | onealt = malloc (pattern_len); |
384 | if (onealt == NULL) |
385 | return GLOB_NOSPACE; |
386 | } |
387 | |
388 | /* We know the prefix for all sub-patterns. */ |
389 | alt_start = mempcpy (onealt, pattern, begin - pattern); |
390 | |
391 | /* Find the first sub-pattern and at the same time find the |
392 | rest after the closing brace. */ |
393 | next = next_brace_sub (begin + 1, flags); |
394 | if (next == NULL) |
395 | { |
396 | /* It is an invalid expression. */ |
397 | illegal_brace: |
398 | if (__glibc_unlikely (!alloca_onealt)) |
399 | free (onealt); |
400 | flags &= ~GLOB_BRACE; |
401 | goto no_brace; |
402 | } |
403 | |
404 | /* Now find the end of the whole brace expression. */ |
405 | rest = next; |
406 | while (*rest != '}') |
407 | { |
408 | rest = next_brace_sub (rest + 1, flags); |
409 | if (rest == NULL) |
410 | /* It is an illegal expression. */ |
411 | goto illegal_brace; |
412 | } |
413 | /* Please note that we now can be sure the brace expression |
414 | is well-formed. */ |
415 | rest_len = strlen (++rest) + 1; |
416 | |
417 | /* We have a brace expression. BEGIN points to the opening {, |
418 | NEXT points past the terminator of the first element, and END |
419 | points past the final }. We will accumulate result names from |
420 | recursive runs for each brace alternative in the buffer using |
421 | GLOB_APPEND. */ |
422 | firstc = pglob->gl_pathc; |
423 | |
424 | p = begin + 1; |
425 | while (1) |
426 | { |
427 | int result; |
428 | |
429 | /* Construct the new glob expression. */ |
430 | mempcpy (mempcpy (alt_start, p, next - p), rest, rest_len); |
431 | |
432 | result = __glob (onealt, |
433 | ((flags & ~(GLOB_NOCHECK | GLOB_NOMAGIC)) |
434 | | GLOB_APPEND), |
435 | errfunc, pglob); |
436 | |
437 | /* If we got an error, return it. */ |
438 | if (result && result != GLOB_NOMATCH) |
439 | { |
440 | if (__glibc_unlikely (!alloca_onealt)) |
441 | free (onealt); |
442 | if (!(flags & GLOB_APPEND)) |
443 | { |
444 | globfree (pglob); |
445 | pglob->gl_pathc = 0; |
446 | } |
447 | return result; |
448 | } |
449 | |
450 | if (*next == '}') |
451 | /* We saw the last entry. */ |
452 | break; |
453 | |
454 | p = next + 1; |
455 | next = next_brace_sub (p, flags); |
456 | assert (next != NULL); |
457 | } |
458 | |
459 | if (__glibc_unlikely (!alloca_onealt)) |
460 | free (onealt); |
461 | |
462 | if (pglob->gl_pathc != firstc) |
463 | /* We found some entries. */ |
464 | return 0; |
465 | else if (!(flags & (GLOB_NOCHECK|GLOB_NOMAGIC))) |
466 | return GLOB_NOMATCH; |
467 | } |
468 | } |
469 | |
470 | no_brace: |
471 | oldcount = pglob->gl_pathc + pglob->gl_offs; |
472 | |
473 | /* Find the filename. */ |
474 | filename = strrchr (pattern, '/'); |
475 | |
476 | #if defined __MSDOS__ || defined WINDOWS32 |
477 | /* The case of "d:pattern". Since ':' is not allowed in |
478 | file names, we can safely assume that wherever it |
479 | happens in pattern, it signals the filename part. This |
480 | is so we could some day support patterns like "[a-z]:foo". */ |
481 | if (filename == NULL) |
482 | filename = strchr (pattern, ':'); |
483 | #endif /* __MSDOS__ || WINDOWS32 */ |
484 | |
485 | dirname_modified = 0; |
486 | if (filename == NULL) |
487 | { |
488 | /* This can mean two things: a simple name or "~name". The latter |
489 | case is nothing but a notation for a directory. */ |
490 | if ((flags & (GLOB_TILDE|GLOB_TILDE_CHECK)) && pattern[0] == '~') |
491 | { |
492 | dirname = (char *) pattern; |
493 | dirlen = strlen (pattern); |
494 | |
495 | /* Set FILENAME to NULL as a special flag. This is ugly but |
496 | other solutions would require much more code. We test for |
497 | this special case below. */ |
498 | filename = NULL; |
499 | } |
500 | else |
501 | { |
502 | if (__glibc_unlikely (pattern[0] == '\0')) |
503 | { |
504 | dirs.gl_pathv = NULL; |
505 | goto no_matches; |
506 | } |
507 | |
508 | filename = pattern; |
509 | dirname = (char *) "." ; |
510 | dirlen = 0; |
511 | } |
512 | } |
513 | else if (filename == pattern |
514 | || (filename == pattern + 1 && pattern[0] == '\\' |
515 | && (flags & GLOB_NOESCAPE) == 0)) |
516 | { |
517 | /* "/pattern" or "\\/pattern". */ |
518 | dirname = (char *) "/" ; |
519 | dirlen = 1; |
520 | ++filename; |
521 | } |
522 | else |
523 | { |
524 | char *newp; |
525 | dirlen = filename - pattern; |
526 | #if defined __MSDOS__ || defined WINDOWS32 |
527 | if (*filename == ':' |
528 | || (filename > pattern + 1 && filename[-1] == ':')) |
529 | { |
530 | char *drive_spec; |
531 | |
532 | ++dirlen; |
533 | drive_spec = __alloca (dirlen + 1); |
534 | *((char *) mempcpy (drive_spec, pattern, dirlen)) = '\0'; |
535 | /* For now, disallow wildcards in the drive spec, to |
536 | prevent infinite recursion in glob. */ |
537 | if (__glob_pattern_p (drive_spec, !(flags & GLOB_NOESCAPE))) |
538 | return GLOB_NOMATCH; |
539 | /* If this is "d:pattern", we need to copy ':' to DIRNAME |
540 | as well. If it's "d:/pattern", don't remove the slash |
541 | from "d:/", since "d:" and "d:/" are not the same.*/ |
542 | } |
543 | #endif |
544 | |
545 | if (glob_use_alloca (alloca_used, dirlen + 1)) |
546 | newp = alloca_account (dirlen + 1, alloca_used); |
547 | else |
548 | { |
549 | newp = malloc (dirlen + 1); |
550 | if (newp == NULL) |
551 | return GLOB_NOSPACE; |
552 | malloc_dirname = 1; |
553 | } |
554 | *((char *) mempcpy (newp, pattern, dirlen)) = '\0'; |
555 | dirname = newp; |
556 | ++filename; |
557 | |
558 | #if defined __MSDOS__ || defined WINDOWS32 |
559 | bool drive_root = (dirlen > 1 |
560 | && (dirname[dirlen - 1] == ':' |
561 | || (dirlen > 2 && dirname[dirlen - 2] == ':' |
562 | && dirname[dirlen - 1] == '/'))); |
563 | #else |
564 | bool drive_root = false; |
565 | #endif |
566 | |
567 | if (filename[0] == '\0' && dirlen > 1 && !drive_root) |
568 | /* "pattern/". Expand "pattern", appending slashes. */ |
569 | { |
570 | int orig_flags = flags; |
571 | if (!(flags & GLOB_NOESCAPE) && dirname[dirlen - 1] == '\\') |
572 | { |
573 | /* "pattern\\/". Remove the final backslash if it hasn't |
574 | been quoted. */ |
575 | char *p = (char *) &dirname[dirlen - 1]; |
576 | |
577 | while (p > dirname && p[-1] == '\\') --p; |
578 | if ((&dirname[dirlen] - p) & 1) |
579 | { |
580 | *(char *) &dirname[--dirlen] = '\0'; |
581 | flags &= ~(GLOB_NOCHECK | GLOB_NOMAGIC); |
582 | } |
583 | } |
584 | int val = __glob (dirname, flags | GLOB_MARK, errfunc, pglob); |
585 | if (val == 0) |
586 | pglob->gl_flags = ((pglob->gl_flags & ~GLOB_MARK) |
587 | | (flags & GLOB_MARK)); |
588 | else if (val == GLOB_NOMATCH && flags != orig_flags) |
589 | { |
590 | /* Make sure globfree (&dirs); is a nop. */ |
591 | dirs.gl_pathv = NULL; |
592 | flags = orig_flags; |
593 | oldcount = pglob->gl_pathc + pglob->gl_offs; |
594 | goto no_matches; |
595 | } |
596 | retval = val; |
597 | goto out; |
598 | } |
599 | } |
600 | |
601 | if ((flags & (GLOB_TILDE|GLOB_TILDE_CHECK)) && dirname[0] == '~') |
602 | { |
603 | if (dirname[1] == '\0' || dirname[1] == '/' |
604 | || (!(flags & GLOB_NOESCAPE) && dirname[1] == '\\' |
605 | && (dirname[2] == '\0' || dirname[2] == '/'))) |
606 | { |
607 | /* Look up home directory. */ |
608 | char *home_dir = getenv ("HOME" ); |
609 | int malloc_home_dir = 0; |
610 | if (home_dir == NULL || home_dir[0] == '\0') |
611 | { |
612 | #ifdef WINDOWS32 |
613 | /* Windows NT defines HOMEDRIVE and HOMEPATH. But give |
614 | preference to HOME, because the user can change HOME. */ |
615 | const char *home_drive = getenv ("HOMEDRIVE" ); |
616 | const char *home_path = getenv ("HOMEPATH" ); |
617 | |
618 | if (home_drive != NULL && home_path != NULL) |
619 | { |
620 | size_t home_drive_len = strlen (home_drive); |
621 | size_t home_path_len = strlen (home_path); |
622 | char *mem = alloca (home_drive_len + home_path_len + 1); |
623 | |
624 | memcpy (mem, home_drive, home_drive_len); |
625 | memcpy (mem + home_drive_len, home_path, home_path_len + 1); |
626 | home_dir = mem; |
627 | } |
628 | else |
629 | home_dir = "c:/users/default" ; /* poor default */ |
630 | #else |
631 | int err; |
632 | struct passwd *p; |
633 | struct passwd pwbuf; |
634 | struct scratch_buffer s; |
635 | scratch_buffer_init (&s); |
636 | while (true) |
637 | { |
638 | p = NULL; |
639 | err = __getlogin_r (s.data, s.length); |
640 | if (err == 0) |
641 | { |
642 | # if defined HAVE_GETPWNAM_R || defined _LIBC |
643 | size_t ssize = strlen (s.data) + 1; |
644 | char *sdata = s.data; |
645 | err = getpwnam_r (sdata, &pwbuf, sdata + ssize, |
646 | s.length - ssize, &p); |
647 | # else |
648 | p = getpwnam (s.data); |
649 | if (p == NULL) |
650 | err = errno; |
651 | # endif |
652 | } |
653 | if (err != ERANGE) |
654 | break; |
655 | if (!scratch_buffer_grow (&s)) |
656 | { |
657 | retval = GLOB_NOSPACE; |
658 | goto out; |
659 | } |
660 | } |
661 | if (err == 0) |
662 | { |
663 | home_dir = strdup (p->pw_dir); |
664 | malloc_home_dir = 1; |
665 | } |
666 | scratch_buffer_free (&s); |
667 | if (err == 0 && home_dir == NULL) |
668 | { |
669 | retval = GLOB_NOSPACE; |
670 | goto out; |
671 | } |
672 | #endif /* WINDOWS32 */ |
673 | } |
674 | if (home_dir == NULL || home_dir[0] == '\0') |
675 | { |
676 | if (__glibc_unlikely (malloc_home_dir)) |
677 | free (home_dir); |
678 | if (flags & GLOB_TILDE_CHECK) |
679 | { |
680 | retval = GLOB_NOMATCH; |
681 | goto out; |
682 | } |
683 | else |
684 | { |
685 | home_dir = (char *) "~" ; /* No luck. */ |
686 | malloc_home_dir = 0; |
687 | } |
688 | } |
689 | /* Now construct the full directory. */ |
690 | if (dirname[1] == '\0') |
691 | { |
692 | if (__glibc_unlikely (malloc_dirname)) |
693 | free (dirname); |
694 | |
695 | dirname = home_dir; |
696 | dirlen = strlen (dirname); |
697 | malloc_dirname = malloc_home_dir; |
698 | } |
699 | else |
700 | { |
701 | char *newp; |
702 | size_t home_len = strlen (home_dir); |
703 | int use_alloca = glob_use_alloca (alloca_used, home_len + dirlen); |
704 | if (use_alloca) |
705 | newp = alloca_account (home_len + dirlen, alloca_used); |
706 | else |
707 | { |
708 | newp = malloc (home_len + dirlen); |
709 | if (newp == NULL) |
710 | { |
711 | if (__glibc_unlikely (malloc_home_dir)) |
712 | free (home_dir); |
713 | retval = GLOB_NOSPACE; |
714 | goto out; |
715 | } |
716 | } |
717 | |
718 | mempcpy (mempcpy (newp, home_dir, home_len), |
719 | &dirname[1], dirlen); |
720 | |
721 | if (__glibc_unlikely (malloc_dirname)) |
722 | free (dirname); |
723 | |
724 | dirname = newp; |
725 | dirlen += home_len - 1; |
726 | malloc_dirname = !use_alloca; |
727 | |
728 | if (__glibc_unlikely (malloc_home_dir)) |
729 | free (home_dir); |
730 | } |
731 | dirname_modified = 1; |
732 | } |
733 | else |
734 | { |
735 | #ifndef WINDOWS32 |
736 | char *end_name = strchr (dirname, '/'); |
737 | char *user_name; |
738 | int malloc_user_name = 0; |
739 | char *unescape = NULL; |
740 | |
741 | if (!(flags & GLOB_NOESCAPE)) |
742 | { |
743 | if (end_name == NULL) |
744 | { |
745 | unescape = strchr (dirname, '\\'); |
746 | if (unescape) |
747 | end_name = strchr (unescape, '\0'); |
748 | } |
749 | else |
750 | unescape = memchr (dirname, '\\', end_name - dirname); |
751 | } |
752 | if (end_name == NULL) |
753 | user_name = dirname + 1; |
754 | else |
755 | { |
756 | char *newp; |
757 | if (glob_use_alloca (alloca_used, end_name - dirname)) |
758 | newp = alloca_account (end_name - dirname, alloca_used); |
759 | else |
760 | { |
761 | newp = malloc (end_name - dirname); |
762 | if (newp == NULL) |
763 | { |
764 | retval = GLOB_NOSPACE; |
765 | goto out; |
766 | } |
767 | malloc_user_name = 1; |
768 | } |
769 | if (unescape != NULL) |
770 | { |
771 | char *p = mempcpy (newp, dirname + 1, |
772 | unescape - dirname - 1); |
773 | char *q = unescape; |
774 | while (q != end_name) |
775 | { |
776 | if (*q == '\\') |
777 | { |
778 | if (q + 1 == end_name) |
779 | { |
780 | /* "~fo\\o\\" unescape to user_name "foo\\", |
781 | but "~fo\\o\\/" unescape to user_name |
782 | "foo". */ |
783 | if (filename == NULL) |
784 | *p++ = '\\'; |
785 | break; |
786 | } |
787 | ++q; |
788 | } |
789 | *p++ = *q++; |
790 | } |
791 | *p = '\0'; |
792 | } |
793 | else |
794 | *((char *) mempcpy (newp, dirname + 1, end_name - dirname - 1)) |
795 | = '\0'; |
796 | user_name = newp; |
797 | } |
798 | |
799 | /* Look up specific user's home directory. */ |
800 | { |
801 | struct passwd *p; |
802 | struct scratch_buffer pwtmpbuf; |
803 | scratch_buffer_init (&pwtmpbuf); |
804 | |
805 | # if defined HAVE_GETPWNAM_R || defined _LIBC |
806 | struct passwd pwbuf; |
807 | |
808 | while (getpwnam_r (user_name, &pwbuf, |
809 | pwtmpbuf.data, pwtmpbuf.length, &p) |
810 | == ERANGE) |
811 | { |
812 | if (!scratch_buffer_grow (&pwtmpbuf)) |
813 | { |
814 | retval = GLOB_NOSPACE; |
815 | goto out; |
816 | } |
817 | } |
818 | # else |
819 | p = getpwnam (user_name); |
820 | # endif |
821 | |
822 | if (__glibc_unlikely (malloc_user_name)) |
823 | free (user_name); |
824 | |
825 | /* If we found a home directory use this. */ |
826 | if (p != NULL) |
827 | { |
828 | size_t home_len = strlen (p->pw_dir); |
829 | size_t rest_len = end_name == NULL ? 0 : strlen (end_name); |
830 | char *d; |
831 | |
832 | if (__glibc_unlikely (malloc_dirname)) |
833 | free (dirname); |
834 | malloc_dirname = 0; |
835 | |
836 | if (glob_use_alloca (alloca_used, home_len + rest_len + 1)) |
837 | dirname = alloca_account (home_len + rest_len + 1, |
838 | alloca_used); |
839 | else |
840 | { |
841 | dirname = malloc (home_len + rest_len + 1); |
842 | if (dirname == NULL) |
843 | { |
844 | scratch_buffer_free (&pwtmpbuf); |
845 | retval = GLOB_NOSPACE; |
846 | goto out; |
847 | } |
848 | malloc_dirname = 1; |
849 | } |
850 | d = mempcpy (dirname, p->pw_dir, home_len); |
851 | if (end_name != NULL) |
852 | d = mempcpy (d, end_name, rest_len); |
853 | *d = '\0'; |
854 | |
855 | dirlen = home_len + rest_len; |
856 | dirname_modified = 1; |
857 | } |
858 | else |
859 | { |
860 | if (flags & GLOB_TILDE_CHECK) |
861 | { |
862 | /* We have to regard it as an error if we cannot find the |
863 | home directory. */ |
864 | retval = GLOB_NOMATCH; |
865 | goto out; |
866 | } |
867 | } |
868 | scratch_buffer_free (&pwtmpbuf); |
869 | } |
870 | #endif /* !WINDOWS32 */ |
871 | } |
872 | } |
873 | |
874 | /* Now test whether we looked for "~" or "~NAME". In this case we |
875 | can give the answer now. */ |
876 | if (filename == NULL) |
877 | { |
878 | size_t newcount = pglob->gl_pathc + pglob->gl_offs; |
879 | char **new_gl_pathv; |
880 | |
881 | if (newcount > SIZE_MAX / sizeof (char *) - 2) |
882 | { |
883 | nospace: |
884 | free (pglob->gl_pathv); |
885 | pglob->gl_pathv = NULL; |
886 | pglob->gl_pathc = 0; |
887 | retval = GLOB_NOSPACE; |
888 | goto out; |
889 | } |
890 | |
891 | new_gl_pathv = realloc (pglob->gl_pathv, |
892 | (newcount + 2) * sizeof (char *)); |
893 | if (new_gl_pathv == NULL) |
894 | goto nospace; |
895 | pglob->gl_pathv = new_gl_pathv; |
896 | |
897 | if (flags & GLOB_MARK && is_dir (dirname, flags, pglob)) |
898 | { |
899 | char *p; |
900 | pglob->gl_pathv[newcount] = malloc (dirlen + 2); |
901 | if (pglob->gl_pathv[newcount] == NULL) |
902 | goto nospace; |
903 | p = mempcpy (pglob->gl_pathv[newcount], dirname, dirlen); |
904 | p[0] = '/'; |
905 | p[1] = '\0'; |
906 | if (__glibc_unlikely (malloc_dirname)) |
907 | free (dirname); |
908 | } |
909 | else |
910 | { |
911 | if (__glibc_unlikely (malloc_dirname)) |
912 | pglob->gl_pathv[newcount] = dirname; |
913 | else |
914 | { |
915 | pglob->gl_pathv[newcount] = strdup (dirname); |
916 | if (pglob->gl_pathv[newcount] == NULL) |
917 | goto nospace; |
918 | } |
919 | } |
920 | pglob->gl_pathv[++newcount] = NULL; |
921 | ++pglob->gl_pathc; |
922 | pglob->gl_flags = flags; |
923 | |
924 | return 0; |
925 | } |
926 | |
927 | meta = __glob_pattern_type (dirname, !(flags & GLOB_NOESCAPE)); |
928 | /* meta is 1 if correct glob pattern containing metacharacters. |
929 | If meta has bit (1 << 2) set, it means there was an unterminated |
930 | [ which we handle the same, using fnmatch. Broken unterminated |
931 | pattern bracket expressions ought to be rare enough that it is |
932 | not worth special casing them, fnmatch will do the right thing. */ |
933 | if (meta & (GLOBPAT_SPECIAL | GLOBPAT_BRACKET)) |
934 | { |
935 | /* The directory name contains metacharacters, so we |
936 | have to glob for the directory, and then glob for |
937 | the pattern in each directory found. */ |
938 | size_t i; |
939 | |
940 | if (!(flags & GLOB_NOESCAPE) && dirlen > 0 && dirname[dirlen - 1] == '\\') |
941 | { |
942 | /* "foo\\/bar". Remove the final backslash from dirname |
943 | if it has not been quoted. */ |
944 | char *p = (char *) &dirname[dirlen - 1]; |
945 | |
946 | while (p > dirname && p[-1] == '\\') --p; |
947 | if ((&dirname[dirlen] - p) & 1) |
948 | *(char *) &dirname[--dirlen] = '\0'; |
949 | } |
950 | |
951 | if (__glibc_unlikely ((flags & GLOB_ALTDIRFUNC) != 0)) |
952 | { |
953 | /* Use the alternative access functions also in the recursive |
954 | call. */ |
955 | dirs.gl_opendir = pglob->gl_opendir; |
956 | dirs.gl_readdir = pglob->gl_readdir; |
957 | dirs.gl_closedir = pglob->gl_closedir; |
958 | dirs.gl_stat = pglob->gl_stat; |
959 | dirs.gl_lstat = pglob->gl_lstat; |
960 | } |
961 | |
962 | status = __glob (dirname, |
963 | ((flags & (GLOB_ERR | GLOB_NOESCAPE | GLOB_ALTDIRFUNC)) |
964 | | GLOB_NOSORT | GLOB_ONLYDIR), |
965 | errfunc, &dirs); |
966 | if (status != 0) |
967 | { |
968 | if ((flags & GLOB_NOCHECK) == 0 || status != GLOB_NOMATCH) |
969 | { |
970 | retval = status; |
971 | goto out; |
972 | } |
973 | goto no_matches; |
974 | } |
975 | |
976 | /* We have successfully globbed the preceding directory name. |
977 | For each name we found, call glob_in_dir on it and FILENAME, |
978 | appending the results to PGLOB. */ |
979 | for (i = 0; i < dirs.gl_pathc; ++i) |
980 | { |
981 | size_t old_pathc; |
982 | |
983 | old_pathc = pglob->gl_pathc; |
984 | status = glob_in_dir (filename, dirs.gl_pathv[i], |
985 | ((flags | GLOB_APPEND) |
986 | & ~(GLOB_NOCHECK | GLOB_NOMAGIC)), |
987 | errfunc, pglob, alloca_used); |
988 | if (status == GLOB_NOMATCH) |
989 | /* No matches in this directory. Try the next. */ |
990 | continue; |
991 | |
992 | if (status != 0) |
993 | { |
994 | globfree (&dirs); |
995 | globfree (pglob); |
996 | pglob->gl_pathc = 0; |
997 | retval = status; |
998 | goto out; |
999 | } |
1000 | |
1001 | /* Stick the directory on the front of each name. */ |
1002 | if (prefix_array (dirs.gl_pathv[i], |
1003 | &pglob->gl_pathv[old_pathc + pglob->gl_offs], |
1004 | pglob->gl_pathc - old_pathc)) |
1005 | { |
1006 | globfree (&dirs); |
1007 | globfree (pglob); |
1008 | pglob->gl_pathc = 0; |
1009 | retval = GLOB_NOSPACE; |
1010 | goto out; |
1011 | } |
1012 | } |
1013 | |
1014 | flags |= GLOB_MAGCHAR; |
1015 | |
1016 | /* We have ignored the GLOB_NOCHECK flag in the 'glob_in_dir' calls. |
1017 | But if we have not found any matching entry and the GLOB_NOCHECK |
1018 | flag was set we must return the input pattern itself. */ |
1019 | if (pglob->gl_pathc + pglob->gl_offs == oldcount) |
1020 | { |
1021 | no_matches: |
1022 | /* No matches. */ |
1023 | if (flags & GLOB_NOCHECK) |
1024 | { |
1025 | size_t newcount = pglob->gl_pathc + pglob->gl_offs; |
1026 | char **new_gl_pathv; |
1027 | |
1028 | if (newcount > SIZE_MAX / sizeof (char *) - 2) |
1029 | { |
1030 | nospace2: |
1031 | globfree (&dirs); |
1032 | retval = GLOB_NOSPACE; |
1033 | goto out; |
1034 | } |
1035 | |
1036 | new_gl_pathv = realloc (pglob->gl_pathv, |
1037 | (newcount + 2) * sizeof (char *)); |
1038 | if (new_gl_pathv == NULL) |
1039 | goto nospace2; |
1040 | pglob->gl_pathv = new_gl_pathv; |
1041 | |
1042 | pglob->gl_pathv[newcount] = strdup (pattern); |
1043 | if (pglob->gl_pathv[newcount] == NULL) |
1044 | { |
1045 | globfree (&dirs); |
1046 | globfree (pglob); |
1047 | pglob->gl_pathc = 0; |
1048 | retval = GLOB_NOSPACE; |
1049 | goto out; |
1050 | } |
1051 | |
1052 | ++pglob->gl_pathc; |
1053 | ++newcount; |
1054 | |
1055 | pglob->gl_pathv[newcount] = NULL; |
1056 | pglob->gl_flags = flags; |
1057 | } |
1058 | else |
1059 | { |
1060 | globfree (&dirs); |
1061 | retval = GLOB_NOMATCH; |
1062 | goto out; |
1063 | } |
1064 | } |
1065 | |
1066 | globfree (&dirs); |
1067 | } |
1068 | else |
1069 | { |
1070 | size_t old_pathc = pglob->gl_pathc; |
1071 | int orig_flags = flags; |
1072 | |
1073 | if (meta & GLOBPAT_BACKSLASH) |
1074 | { |
1075 | char *p = strchr (dirname, '\\'), *q; |
1076 | /* We need to unescape the dirname string. It is certainly |
1077 | allocated by alloca, as otherwise filename would be NULL |
1078 | or dirname wouldn't contain backslashes. */ |
1079 | q = p; |
1080 | do |
1081 | { |
1082 | if (*p == '\\') |
1083 | { |
1084 | *q = *++p; |
1085 | --dirlen; |
1086 | } |
1087 | else |
1088 | *q = *p; |
1089 | ++q; |
1090 | } |
1091 | while (*p++ != '\0'); |
1092 | dirname_modified = 1; |
1093 | } |
1094 | if (dirname_modified) |
1095 | flags &= ~(GLOB_NOCHECK | GLOB_NOMAGIC); |
1096 | status = glob_in_dir (filename, dirname, flags, errfunc, pglob, |
1097 | alloca_used); |
1098 | if (status != 0) |
1099 | { |
1100 | if (status == GLOB_NOMATCH && flags != orig_flags |
1101 | && pglob->gl_pathc + pglob->gl_offs == oldcount) |
1102 | { |
1103 | /* Make sure globfree (&dirs); is a nop. */ |
1104 | dirs.gl_pathv = NULL; |
1105 | flags = orig_flags; |
1106 | goto no_matches; |
1107 | } |
1108 | retval = status; |
1109 | goto out; |
1110 | } |
1111 | |
1112 | if (dirlen > 0) |
1113 | { |
1114 | /* Stick the directory on the front of each name. */ |
1115 | if (prefix_array (dirname, |
1116 | &pglob->gl_pathv[old_pathc + pglob->gl_offs], |
1117 | pglob->gl_pathc - old_pathc)) |
1118 | { |
1119 | globfree (pglob); |
1120 | pglob->gl_pathc = 0; |
1121 | retval = GLOB_NOSPACE; |
1122 | goto out; |
1123 | } |
1124 | } |
1125 | } |
1126 | |
1127 | if (flags & GLOB_MARK) |
1128 | { |
1129 | /* Append slashes to directory names. */ |
1130 | size_t i; |
1131 | |
1132 | for (i = oldcount; i < pglob->gl_pathc + pglob->gl_offs; ++i) |
1133 | if (is_dir (pglob->gl_pathv[i], flags, pglob)) |
1134 | { |
1135 | size_t len = strlen (pglob->gl_pathv[i]) + 2; |
1136 | char *new = realloc (pglob->gl_pathv[i], len); |
1137 | if (new == NULL) |
1138 | { |
1139 | globfree (pglob); |
1140 | pglob->gl_pathc = 0; |
1141 | retval = GLOB_NOSPACE; |
1142 | goto out; |
1143 | } |
1144 | strcpy (&new[len - 2], "/" ); |
1145 | pglob->gl_pathv[i] = new; |
1146 | } |
1147 | } |
1148 | |
1149 | if (!(flags & GLOB_NOSORT)) |
1150 | { |
1151 | /* Sort the vector. */ |
1152 | qsort (&pglob->gl_pathv[oldcount], |
1153 | pglob->gl_pathc + pglob->gl_offs - oldcount, |
1154 | sizeof (char *), collated_compare); |
1155 | } |
1156 | |
1157 | out: |
1158 | if (__glibc_unlikely (malloc_dirname)) |
1159 | free (dirname); |
1160 | |
1161 | return retval; |
1162 | } |
1163 | #if defined _LIBC && !defined __glob |
1164 | versioned_symbol (libc, __glob, glob, GLIBC_2_27); |
1165 | libc_hidden_ver (__glob, glob) |
1166 | #endif |
1167 | |
1168 | |
1169 | /* Do a collated comparison of A and B. */ |
1170 | static int |
1171 | collated_compare (const void *a, const void *b) |
1172 | { |
1173 | char *const *ps1 = a; char *s1 = *ps1; |
1174 | char *const *ps2 = b; char *s2 = *ps2; |
1175 | |
1176 | if (s1 == s2) |
1177 | return 0; |
1178 | if (s1 == NULL) |
1179 | return 1; |
1180 | if (s2 == NULL) |
1181 | return -1; |
1182 | return strcoll (s1, s2); |
1183 | } |
1184 | |
1185 | |
1186 | /* Prepend DIRNAME to each of N members of ARRAY, replacing ARRAY's |
1187 | elements in place. Return nonzero if out of memory, zero if successful. |
1188 | A slash is inserted between DIRNAME and each elt of ARRAY, |
1189 | unless DIRNAME is just "/". Each old element of ARRAY is freed. */ |
1190 | static int |
1191 | prefix_array (const char *dirname, char **array, size_t n) |
1192 | { |
1193 | size_t i; |
1194 | size_t dirlen = strlen (dirname); |
1195 | char dirsep_char = '/'; |
1196 | |
1197 | if (dirlen == 1 && dirname[0] == '/') |
1198 | /* DIRNAME is just "/", so normal prepending would get us "//foo". |
1199 | We want "/foo" instead, so don't prepend any chars from DIRNAME. */ |
1200 | dirlen = 0; |
1201 | |
1202 | #if defined __MSDOS__ || defined WINDOWS32 |
1203 | if (dirlen > 1) |
1204 | { |
1205 | if (dirname[dirlen - 1] == '/' && dirname[dirlen - 2] == ':') |
1206 | /* DIRNAME is "d:/". Don't prepend the slash from DIRNAME. */ |
1207 | --dirlen; |
1208 | else if (dirname[dirlen - 1] == ':') |
1209 | { |
1210 | /* DIRNAME is "d:". Use ':' instead of '/'. */ |
1211 | --dirlen; |
1212 | dirsep_char = ':'; |
1213 | } |
1214 | } |
1215 | #endif |
1216 | |
1217 | for (i = 0; i < n; ++i) |
1218 | { |
1219 | size_t eltlen = strlen (array[i]) + 1; |
1220 | char *new = malloc (dirlen + 1 + eltlen); |
1221 | if (new == NULL) |
1222 | { |
1223 | while (i > 0) |
1224 | free (array[--i]); |
1225 | return 1; |
1226 | } |
1227 | |
1228 | { |
1229 | char *endp = mempcpy (new, dirname, dirlen); |
1230 | *endp++ = dirsep_char; |
1231 | mempcpy (endp, array[i], eltlen); |
1232 | } |
1233 | free (array[i]); |
1234 | array[i] = new; |
1235 | } |
1236 | |
1237 | return 0; |
1238 | } |
1239 | |
1240 | /* Like 'glob', but PATTERN is a final pathname component, |
1241 | and matches are searched for in DIRECTORY. |
1242 | The GLOB_NOSORT bit in FLAGS is ignored. No sorting is ever done. |
1243 | The GLOB_APPEND flag is assumed to be set (always appends). */ |
1244 | static int |
1245 | glob_in_dir (const char *pattern, const char *directory, int flags, |
1246 | int (*errfunc) (const char *, int), |
1247 | glob_t *pglob, size_t alloca_used) |
1248 | { |
1249 | size_t dirlen = strlen (directory); |
1250 | void *stream = NULL; |
1251 | # define GLOBNAMES_MEMBERS(nnames) \ |
1252 | struct globnames *next; size_t count; char *name[nnames]; |
1253 | struct globnames { GLOBNAMES_MEMBERS (FLEXIBLE_ARRAY_MEMBER) }; |
1254 | struct { GLOBNAMES_MEMBERS (64) } init_names_buf; |
1255 | struct globnames *init_names = (struct globnames *) &init_names_buf; |
1256 | struct globnames *names = init_names; |
1257 | struct globnames *names_alloca = init_names; |
1258 | size_t nfound = 0; |
1259 | size_t cur = 0; |
1260 | int meta; |
1261 | int save; |
1262 | int result; |
1263 | |
1264 | alloca_used += sizeof init_names_buf; |
1265 | |
1266 | init_names->next = NULL; |
1267 | init_names->count = ((sizeof init_names_buf |
1268 | - offsetof (struct globnames, name)) |
1269 | / sizeof init_names->name[0]); |
1270 | |
1271 | meta = __glob_pattern_type (pattern, !(flags & GLOB_NOESCAPE)); |
1272 | if (meta == GLOBPAT_NONE && (flags & (GLOB_NOCHECK|GLOB_NOMAGIC))) |
1273 | { |
1274 | /* We need not do any tests. The PATTERN contains no meta |
1275 | characters and we must not return an error therefore the |
1276 | result will always contain exactly one name. */ |
1277 | flags |= GLOB_NOCHECK; |
1278 | } |
1279 | else if (meta == GLOBPAT_NONE) |
1280 | { |
1281 | size_t patlen = strlen (pattern); |
1282 | size_t fullsize; |
1283 | bool alloca_fullname |
1284 | = (! size_add_wrapv (dirlen + 1, patlen + 1, &fullsize) |
1285 | && glob_use_alloca (alloca_used, fullsize)); |
1286 | char *fullname; |
1287 | if (alloca_fullname) |
1288 | fullname = alloca_account (fullsize, alloca_used); |
1289 | else |
1290 | { |
1291 | fullname = malloc (fullsize); |
1292 | if (fullname == NULL) |
1293 | return GLOB_NOSPACE; |
1294 | } |
1295 | |
1296 | mempcpy (mempcpy (mempcpy (fullname, directory, dirlen), |
1297 | "/" , 1), |
1298 | pattern, patlen + 1); |
1299 | if (glob_lstat (pglob, flags, fullname) == 0 |
1300 | || errno == EOVERFLOW) |
1301 | /* We found this file to be existing. Now tell the rest |
1302 | of the function to copy this name into the result. */ |
1303 | flags |= GLOB_NOCHECK; |
1304 | |
1305 | if (__glibc_unlikely (!alloca_fullname)) |
1306 | free (fullname); |
1307 | } |
1308 | else |
1309 | { |
1310 | stream = (__builtin_expect (flags & GLOB_ALTDIRFUNC, 0) |
1311 | ? (*pglob->gl_opendir) (directory) |
1312 | : opendir (directory)); |
1313 | if (stream == NULL) |
1314 | { |
1315 | if (errno != ENOTDIR |
1316 | && ((errfunc != NULL && (*errfunc) (directory, errno)) |
1317 | || (flags & GLOB_ERR))) |
1318 | return GLOB_ABORTED; |
1319 | } |
1320 | else |
1321 | { |
1322 | int fnm_flags = ((!(flags & GLOB_PERIOD) ? FNM_PERIOD : 0) |
1323 | | ((flags & GLOB_NOESCAPE) ? FNM_NOESCAPE : 0)); |
1324 | flags |= GLOB_MAGCHAR; |
1325 | |
1326 | while (1) |
1327 | { |
1328 | struct readdir_result d; |
1329 | { |
1330 | if (__builtin_expect (flags & GLOB_ALTDIRFUNC, 0)) |
1331 | d = convert_dirent (GL_READDIR (pglob, stream)); |
1332 | else |
1333 | { |
1334 | #ifdef COMPILE_GLOB64 |
1335 | d = convert_dirent (__readdir (stream)); |
1336 | #else |
1337 | d = convert_dirent64 (__readdir64 (stream)); |
1338 | #endif |
1339 | } |
1340 | } |
1341 | if (d.name == NULL) |
1342 | break; |
1343 | |
1344 | /* If we shall match only directories use the information |
1345 | provided by the dirent call if possible. */ |
1346 | if (flags & GLOB_ONLYDIR) |
1347 | switch (readdir_result_type (d)) |
1348 | { |
1349 | case DT_DIR: case DT_LNK: case DT_UNKNOWN: break; |
1350 | default: continue; |
1351 | } |
1352 | |
1353 | if (fnmatch (pattern, d.name, fnm_flags) == 0) |
1354 | { |
1355 | if (cur == names->count) |
1356 | { |
1357 | struct globnames *newnames; |
1358 | size_t count = names->count * 2; |
1359 | size_t nameoff = offsetof (struct globnames, name); |
1360 | size_t size = FLEXSIZEOF (struct globnames, name, |
1361 | count * sizeof (char *)); |
1362 | if ((SIZE_MAX - nameoff) / 2 / sizeof (char *) |
1363 | < names->count) |
1364 | goto memory_error; |
1365 | if (glob_use_alloca (alloca_used, size)) |
1366 | newnames = names_alloca |
1367 | = alloca_account (size, alloca_used); |
1368 | else if ((newnames = malloc (size)) |
1369 | == NULL) |
1370 | goto memory_error; |
1371 | newnames->count = count; |
1372 | newnames->next = names; |
1373 | names = newnames; |
1374 | cur = 0; |
1375 | } |
1376 | names->name[cur] = strdup (d.name); |
1377 | if (names->name[cur] == NULL) |
1378 | goto memory_error; |
1379 | ++cur; |
1380 | ++nfound; |
1381 | if (SIZE_MAX - pglob->gl_offs <= nfound) |
1382 | goto memory_error; |
1383 | } |
1384 | } |
1385 | } |
1386 | } |
1387 | |
1388 | if (nfound == 0 && (flags & GLOB_NOCHECK)) |
1389 | { |
1390 | size_t len = strlen (pattern); |
1391 | nfound = 1; |
1392 | names->name[cur] = malloc (len + 1); |
1393 | if (names->name[cur] == NULL) |
1394 | goto memory_error; |
1395 | *((char *) mempcpy (names->name[cur++], pattern, len)) = '\0'; |
1396 | } |
1397 | |
1398 | result = GLOB_NOMATCH; |
1399 | if (nfound != 0) |
1400 | { |
1401 | char **new_gl_pathv; |
1402 | result = 0; |
1403 | |
1404 | if (SIZE_MAX / sizeof (char *) - pglob->gl_pathc |
1405 | < pglob->gl_offs + nfound + 1) |
1406 | goto memory_error; |
1407 | |
1408 | new_gl_pathv |
1409 | = realloc (pglob->gl_pathv, |
1410 | (pglob->gl_pathc + pglob->gl_offs + nfound + 1) |
1411 | * sizeof (char *)); |
1412 | |
1413 | if (new_gl_pathv == NULL) |
1414 | { |
1415 | memory_error: |
1416 | while (1) |
1417 | { |
1418 | struct globnames *old = names; |
1419 | for (size_t i = 0; i < cur; ++i) |
1420 | free (names->name[i]); |
1421 | names = names->next; |
1422 | /* NB: we will not leak memory here if we exit without |
1423 | freeing the current block assigned to OLD. At least |
1424 | the very first block is always allocated on the stack |
1425 | and this is the block assigned to OLD here. */ |
1426 | if (names == NULL) |
1427 | { |
1428 | assert (old == init_names); |
1429 | break; |
1430 | } |
1431 | cur = names->count; |
1432 | if (old == names_alloca) |
1433 | names_alloca = names; |
1434 | else |
1435 | free (old); |
1436 | } |
1437 | result = GLOB_NOSPACE; |
1438 | } |
1439 | else |
1440 | { |
1441 | while (1) |
1442 | { |
1443 | struct globnames *old = names; |
1444 | for (size_t i = 0; i < cur; ++i) |
1445 | new_gl_pathv[pglob->gl_offs + pglob->gl_pathc++] |
1446 | = names->name[i]; |
1447 | names = names->next; |
1448 | /* NB: we will not leak memory here if we exit without |
1449 | freeing the current block assigned to OLD. At least |
1450 | the very first block is always allocated on the stack |
1451 | and this is the block assigned to OLD here. */ |
1452 | if (names == NULL) |
1453 | { |
1454 | assert (old == init_names); |
1455 | break; |
1456 | } |
1457 | cur = names->count; |
1458 | if (old == names_alloca) |
1459 | names_alloca = names; |
1460 | else |
1461 | free (old); |
1462 | } |
1463 | |
1464 | pglob->gl_pathv = new_gl_pathv; |
1465 | |
1466 | pglob->gl_pathv[pglob->gl_offs + pglob->gl_pathc] = NULL; |
1467 | |
1468 | pglob->gl_flags = flags; |
1469 | } |
1470 | } |
1471 | |
1472 | if (stream != NULL) |
1473 | { |
1474 | save = errno; |
1475 | if (__glibc_unlikely (flags & GLOB_ALTDIRFUNC)) |
1476 | (*pglob->gl_closedir) (stream); |
1477 | else |
1478 | closedir (stream); |
1479 | __set_errno (save); |
1480 | } |
1481 | |
1482 | return result; |
1483 | } |
1484 | |