1 | /* Copyright (C) 1991-2017 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 | #ifndef _LIBC |
19 | # include <config.h> |
20 | #endif |
21 | |
22 | #include <glob.h> |
23 | |
24 | #include <errno.h> |
25 | #include <sys/types.h> |
26 | #include <sys/stat.h> |
27 | #include <stdbool.h> |
28 | #include <stddef.h> |
29 | #include <stdint.h> |
30 | #include <assert.h> |
31 | #include <unistd.h> |
32 | |
33 | #if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__ |
34 | # define WINDOWS32 |
35 | #endif |
36 | |
37 | #ifndef WINDOWS32 |
38 | # include <pwd.h> |
39 | #endif |
40 | |
41 | #include <errno.h> |
42 | #ifndef __set_errno |
43 | # define __set_errno(val) errno = (val) |
44 | #endif |
45 | |
46 | #include <dirent.h> |
47 | #include <stdlib.h> |
48 | #include <string.h> |
49 | #include <alloca.h> |
50 | |
51 | #ifdef _LIBC |
52 | # undef strdup |
53 | # define strdup(str) __strdup (str) |
54 | # define sysconf(id) __sysconf (id) |
55 | # define closedir(dir) __closedir (dir) |
56 | # define opendir(name) __opendir (name) |
57 | # define readdir(str) __readdir64 (str) |
58 | # define getpwnam_r(name, bufp, buf, len, res) \ |
59 | __getpwnam_r (name, bufp, buf, len, res) |
60 | # ifndef __stat64 |
61 | # define __stat64(fname, buf) __xstat64 (_STAT_VER, fname, buf) |
62 | # endif |
63 | # define struct_stat64 struct stat64 |
64 | # define FLEXIBLE_ARRAY_MEMBER |
65 | #else /* !_LIBC */ |
66 | # define __getlogin_r(buf, len) getlogin_r (buf, len) |
67 | # define __stat64(fname, buf) stat (fname, buf) |
68 | # define __fxstatat64(_, d, f, st, flag) fstatat (d, f, st, flag) |
69 | # define struct_stat64 struct stat |
70 | # ifndef __MVS__ |
71 | # define __alloca alloca |
72 | # endif |
73 | # define __readdir readdir |
74 | # define COMPILE_GLOB64 |
75 | #endif /* _LIBC */ |
76 | |
77 | #include <fnmatch.h> |
78 | |
79 | #include <flexmember.h> |
80 | #include <glob_internal.h> |
81 | |
82 | #ifdef _SC_GETPW_R_SIZE_MAX |
83 | # define GETPW_R_SIZE_MAX() sysconf (_SC_GETPW_R_SIZE_MAX) |
84 | #else |
85 | # define GETPW_R_SIZE_MAX() (-1) |
86 | #endif |
87 | #ifdef _SC_LOGIN_NAME_MAX |
88 | # define GET_LOGIN_NAME_MAX() sysconf (_SC_LOGIN_NAME_MAX) |
89 | #else |
90 | # define GET_LOGIN_NAME_MAX() (-1) |
91 | #endif |
92 | |
93 | static const char *next_brace_sub (const char *begin, int flags) __THROWNL; |
94 | |
95 | typedef uint_fast8_t dirent_type; |
96 | |
97 | #if !defined _LIBC && !defined HAVE_STRUCT_DIRENT_D_TYPE |
98 | /* Any distinct values will do here. |
99 | Undef any existing macros out of the way. */ |
100 | # undef DT_UNKNOWN |
101 | # undef DT_DIR |
102 | # undef DT_LNK |
103 | # define DT_UNKNOWN 0 |
104 | # define DT_DIR 1 |
105 | # define DT_LNK 2 |
106 | #endif |
107 | |
108 | /* A representation of a directory entry which does not depend on the |
109 | layout of struct dirent, or the size of ino_t. */ |
110 | struct readdir_result |
111 | { |
112 | const char *name; |
113 | #if defined _DIRENT_HAVE_D_TYPE || defined HAVE_STRUCT_DIRENT_D_TYPE |
114 | dirent_type type; |
115 | #endif |
116 | #if defined _LIBC || defined D_INO_IN_DIRENT |
117 | bool skip_entry; |
118 | #endif |
119 | }; |
120 | |
121 | /* Initialize and return type member of struct readdir_result. */ |
122 | static dirent_type |
123 | readdir_result_type (struct readdir_result d) |
124 | { |
125 | #if defined _DIRENT_HAVE_D_TYPE || defined HAVE_STRUCT_DIRENT_D_TYPE |
126 | # define D_TYPE_TO_RESULT(source) (source)->d_type, |
127 | return d.type; |
128 | #else |
129 | # define D_TYPE_TO_RESULT(source) |
130 | return DT_UNKNOWN; |
131 | #endif |
132 | } |
133 | |
134 | /* Initialize and return skip_entry member of struct readdir_result. */ |
135 | static bool |
136 | readdir_result_skip_entry (struct readdir_result d) |
137 | { |
138 | /* Initializer for skip_entry. POSIX does not require that the d_ino |
139 | field be present, and some systems do not provide it. */ |
140 | #if defined _LIBC || defined D_INO_IN_DIRENT |
141 | # define D_INO_TO_RESULT(source) (source)->d_ino == 0, |
142 | return d.skip_entry; |
143 | #else |
144 | # define D_INO_TO_RESULT(source) |
145 | return false; |
146 | #endif |
147 | } |
148 | |
149 | /* Construct an initializer for a struct readdir_result object from a |
150 | struct dirent *. No copy of the name is made. */ |
151 | #define READDIR_RESULT_INITIALIZER(source) \ |
152 | { \ |
153 | source->d_name, \ |
154 | D_TYPE_TO_RESULT (source) \ |
155 | D_INO_TO_RESULT (source) \ |
156 | } |
157 | |
158 | /* Call gl_readdir on STREAM. This macro can be overridden to reduce |
159 | type safety if an old interface version needs to be supported. */ |
160 | #ifndef GL_READDIR |
161 | # define GL_READDIR(pglob, stream) ((pglob)->gl_readdir (stream)) |
162 | #endif |
163 | |
164 | /* Extract name and type from directory entry. No copy of the name is |
165 | made. If SOURCE is NULL, result name is NULL. Keep in sync with |
166 | convert_dirent64 below. */ |
167 | static struct readdir_result |
168 | convert_dirent (const struct dirent *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 | |
179 | #ifndef COMPILE_GLOB64 |
180 | /* Like convert_dirent, but works on struct dirent64 instead. Keep in |
181 | sync with convert_dirent above. */ |
182 | static struct readdir_result |
183 | convert_dirent64 (const struct dirent64 *source) |
184 | { |
185 | if (source == NULL) |
186 | { |
187 | struct readdir_result result = { NULL, }; |
188 | return result; |
189 | } |
190 | struct readdir_result result = READDIR_RESULT_INITIALIZER (source); |
191 | return result; |
192 | } |
193 | #endif |
194 | |
195 | #ifndef _LIBC |
196 | /* The results of opendir() in this file are not used with dirfd and fchdir, |
197 | and we do not leak fds to any single-threaded code that could use stdio, |
198 | therefore save some unnecessary recursion in fchdir.c and opendir_safer.c. |
199 | FIXME - if the kernel ever adds support for multi-thread safety for |
200 | avoiding standard fds, then we should use opendir_safer. */ |
201 | # ifdef GNULIB_defined_opendir |
202 | # undef opendir |
203 | # endif |
204 | # ifdef GNULIB_defined_closedir |
205 | # undef closedir |
206 | # endif |
207 | |
208 | /* Just use malloc. */ |
209 | # define __libc_use_alloca(n) false |
210 | # define alloca_account(len, avar) ((void) (len), (void) (avar), (void *) 0) |
211 | # define extend_alloca_account(buf, len, newlen, avar) \ |
212 | ((void) (buf), (void) (len), (void) (newlen), (void) (avar), (void *) 0) |
213 | #endif |
214 | |
215 | /* Set *R = A + B. Return true if the answer is mathematically |
216 | incorrect due to overflow; in this case, *R is the low order |
217 | bits of the correct answer. */ |
218 | |
219 | static bool |
220 | size_add_wrapv (size_t a, size_t b, size_t *r) |
221 | { |
222 | #if 5 <= __GNUC__ && !defined __ICC |
223 | return __builtin_add_overflow (a, b, r); |
224 | #else |
225 | *r = a + b; |
226 | return *r < a; |
227 | #endif |
228 | } |
229 | |
230 | static bool |
231 | glob_use_alloca (size_t alloca_used, size_t len) |
232 | { |
233 | size_t size; |
234 | return (!size_add_wrapv (alloca_used, len, &size) |
235 | && __libc_use_alloca (size)); |
236 | } |
237 | |
238 | static int glob_in_dir (const char *pattern, const char *directory, |
239 | int flags, int (*errfunc) (const char *, int), |
240 | glob_t *pglob, size_t alloca_used); |
241 | extern int __glob_pattern_type (const char *pattern, int quote) |
242 | attribute_hidden; |
243 | |
244 | static int prefix_array (const char *prefix, char **array, size_t n) __THROWNL; |
245 | static int collated_compare (const void *, const void *) __THROWNL; |
246 | |
247 | |
248 | /* Find the end of the sub-pattern in a brace expression. */ |
249 | static const char * |
250 | next_brace_sub (const char *cp, int flags) |
251 | { |
252 | size_t depth = 0; |
253 | while (*cp != '\0') |
254 | if ((flags & GLOB_NOESCAPE) == 0 && *cp == '\\') |
255 | { |
256 | if (*++cp == '\0') |
257 | break; |
258 | ++cp; |
259 | } |
260 | else |
261 | { |
262 | if ((*cp == '}' && depth-- == 0) || (*cp == ',' && depth == 0)) |
263 | break; |
264 | |
265 | if (*cp++ == '{') |
266 | depth++; |
267 | } |
268 | |
269 | return *cp != '\0' ? cp : NULL; |
270 | } |
271 | |
272 | |
273 | /* Do glob searching for PATTERN, placing results in PGLOB. |
274 | The bits defined above may be set in FLAGS. |
275 | If a directory cannot be opened or read and ERRFUNC is not nil, |
276 | it is called with the pathname that caused the error, and the |
277 | 'errno' value from the failing call; if it returns non-zero |
278 | 'glob' returns GLOB_ABORTED; if it returns zero, the error is ignored. |
279 | If memory cannot be allocated for PGLOB, GLOB_NOSPACE is returned. |
280 | Otherwise, 'glob' returns zero. */ |
281 | int |
282 | #ifdef GLOB_ATTRIBUTE |
283 | GLOB_ATTRIBUTE |
284 | #endif |
285 | glob (const char *pattern, int flags, int (*errfunc) (const char *, int), |
286 | glob_t *pglob) |
287 | { |
288 | const char *filename; |
289 | char *dirname = NULL; |
290 | size_t dirlen; |
291 | int status; |
292 | size_t oldcount; |
293 | int meta; |
294 | int dirname_modified; |
295 | int malloc_dirname = 0; |
296 | glob_t dirs; |
297 | int retval = 0; |
298 | size_t alloca_used = 0; |
299 | |
300 | if (pattern == NULL || pglob == NULL || (flags & ~__GLOB_FLAGS) != 0) |
301 | { |
302 | __set_errno (EINVAL); |
303 | return -1; |
304 | } |
305 | |
306 | /* POSIX requires all slashes to be matched. This means that with |
307 | a trailing slash we must match only directories. */ |
308 | if (pattern[0] && pattern[strlen (pattern) - 1] == '/') |
309 | flags |= GLOB_ONLYDIR; |
310 | |
311 | if (!(flags & GLOB_DOOFFS)) |
312 | /* Have to do this so 'globfree' knows where to start freeing. It |
313 | also makes all the code that uses gl_offs simpler. */ |
314 | pglob->gl_offs = 0; |
315 | |
316 | if (!(flags & GLOB_APPEND)) |
317 | { |
318 | pglob->gl_pathc = 0; |
319 | if (!(flags & GLOB_DOOFFS)) |
320 | pglob->gl_pathv = NULL; |
321 | else |
322 | { |
323 | size_t i; |
324 | |
325 | if (pglob->gl_offs >= ~((size_t) 0) / sizeof (char *)) |
326 | return GLOB_NOSPACE; |
327 | |
328 | pglob->gl_pathv = (char **) malloc ((pglob->gl_offs + 1) |
329 | * sizeof (char *)); |
330 | if (pglob->gl_pathv == NULL) |
331 | return GLOB_NOSPACE; |
332 | |
333 | for (i = 0; i <= pglob->gl_offs; ++i) |
334 | pglob->gl_pathv[i] = NULL; |
335 | } |
336 | } |
337 | |
338 | if (flags & GLOB_BRACE) |
339 | { |
340 | const char *begin; |
341 | |
342 | if (flags & GLOB_NOESCAPE) |
343 | begin = strchr (pattern, '{'); |
344 | else |
345 | { |
346 | begin = pattern; |
347 | while (1) |
348 | { |
349 | if (*begin == '\0') |
350 | { |
351 | begin = NULL; |
352 | break; |
353 | } |
354 | |
355 | if (*begin == '\\' && begin[1] != '\0') |
356 | ++begin; |
357 | else if (*begin == '{') |
358 | break; |
359 | |
360 | ++begin; |
361 | } |
362 | } |
363 | |
364 | if (begin != NULL) |
365 | { |
366 | /* Allocate working buffer large enough for our work. Note that |
367 | we have at least an opening and closing brace. */ |
368 | size_t firstc; |
369 | char *alt_start; |
370 | const char *p; |
371 | const char *next; |
372 | const char *rest; |
373 | size_t rest_len; |
374 | char *onealt; |
375 | size_t pattern_len = strlen (pattern) - 1; |
376 | int alloca_onealt = glob_use_alloca (alloca_used, pattern_len); |
377 | if (alloca_onealt) |
378 | onealt = alloca_account (pattern_len, alloca_used); |
379 | else |
380 | { |
381 | onealt = malloc (pattern_len); |
382 | if (onealt == NULL) |
383 | return GLOB_NOSPACE; |
384 | } |
385 | |
386 | /* We know the prefix for all sub-patterns. */ |
387 | alt_start = mempcpy (onealt, pattern, begin - pattern); |
388 | |
389 | /* Find the first sub-pattern and at the same time find the |
390 | rest after the closing brace. */ |
391 | next = next_brace_sub (begin + 1, flags); |
392 | if (next == NULL) |
393 | { |
394 | /* It is an invalid expression. */ |
395 | illegal_brace: |
396 | if (__glibc_unlikely (!alloca_onealt)) |
397 | free (onealt); |
398 | flags &= ~GLOB_BRACE; |
399 | goto no_brace; |
400 | } |
401 | |
402 | /* Now find the end of the whole brace expression. */ |
403 | rest = next; |
404 | while (*rest != '}') |
405 | { |
406 | rest = next_brace_sub (rest + 1, flags); |
407 | if (rest == NULL) |
408 | /* It is an illegal expression. */ |
409 | goto illegal_brace; |
410 | } |
411 | /* Please note that we now can be sure the brace expression |
412 | is well-formed. */ |
413 | rest_len = strlen (++rest) + 1; |
414 | |
415 | /* We have a brace expression. BEGIN points to the opening {, |
416 | NEXT points past the terminator of the first element, and END |
417 | points past the final }. We will accumulate result names from |
418 | recursive runs for each brace alternative in the buffer using |
419 | GLOB_APPEND. */ |
420 | firstc = pglob->gl_pathc; |
421 | |
422 | p = begin + 1; |
423 | while (1) |
424 | { |
425 | int result; |
426 | |
427 | /* Construct the new glob expression. */ |
428 | mempcpy (mempcpy (alt_start, p, next - p), rest, rest_len); |
429 | |
430 | result = glob (onealt, |
431 | ((flags & ~(GLOB_NOCHECK | GLOB_NOMAGIC)) |
432 | | GLOB_APPEND), errfunc, pglob); |
433 | |
434 | /* If we got an error, return it. */ |
435 | if (result && result != GLOB_NOMATCH) |
436 | { |
437 | if (__glibc_unlikely (!alloca_onealt)) |
438 | free (onealt); |
439 | if (!(flags & GLOB_APPEND)) |
440 | { |
441 | globfree (pglob); |
442 | pglob->gl_pathc = 0; |
443 | } |
444 | return result; |
445 | } |
446 | |
447 | if (*next == '}') |
448 | /* We saw the last entry. */ |
449 | break; |
450 | |
451 | p = next + 1; |
452 | next = next_brace_sub (p, flags); |
453 | assert (next != NULL); |
454 | } |
455 | |
456 | if (__glibc_unlikely (!alloca_onealt)) |
457 | free (onealt); |
458 | |
459 | if (pglob->gl_pathc != firstc) |
460 | /* We found some entries. */ |
461 | return 0; |
462 | else if (!(flags & (GLOB_NOCHECK|GLOB_NOMAGIC))) |
463 | return GLOB_NOMATCH; |
464 | } |
465 | } |
466 | |
467 | no_brace: |
468 | oldcount = pglob->gl_pathc + pglob->gl_offs; |
469 | |
470 | /* Find the filename. */ |
471 | filename = strrchr (pattern, '/'); |
472 | |
473 | #if defined __MSDOS__ || defined WINDOWS32 |
474 | /* The case of "d:pattern". Since ':' is not allowed in |
475 | file names, we can safely assume that wherever it |
476 | happens in pattern, it signals the filename part. This |
477 | is so we could some day support patterns like "[a-z]:foo". */ |
478 | if (filename == NULL) |
479 | filename = strchr (pattern, ':'); |
480 | #endif /* __MSDOS__ || WINDOWS32 */ |
481 | |
482 | dirname_modified = 0; |
483 | if (filename == NULL) |
484 | { |
485 | /* This can mean two things: a simple name or "~name". The latter |
486 | case is nothing but a notation for a directory. */ |
487 | if ((flags & (GLOB_TILDE|GLOB_TILDE_CHECK)) && pattern[0] == '~') |
488 | { |
489 | dirname = (char *) pattern; |
490 | dirlen = strlen (pattern); |
491 | |
492 | /* Set FILENAME to NULL as a special flag. This is ugly but |
493 | other solutions would require much more code. We test for |
494 | this special case below. */ |
495 | filename = NULL; |
496 | } |
497 | else |
498 | { |
499 | if (__glibc_unlikely (pattern[0] == '\0')) |
500 | { |
501 | dirs.gl_pathv = NULL; |
502 | goto no_matches; |
503 | } |
504 | |
505 | filename = pattern; |
506 | dirname = (char *) "." ; |
507 | dirlen = 0; |
508 | } |
509 | } |
510 | else if (filename == pattern |
511 | || (filename == pattern + 1 && pattern[0] == '\\' |
512 | && (flags & GLOB_NOESCAPE) == 0)) |
513 | { |
514 | /* "/pattern" or "\\/pattern". */ |
515 | dirname = (char *) "/" ; |
516 | dirlen = 1; |
517 | ++filename; |
518 | } |
519 | else |
520 | { |
521 | char *newp; |
522 | dirlen = filename - pattern; |
523 | #if defined __MSDOS__ || defined WINDOWS32 |
524 | if (*filename == ':' |
525 | || (filename > pattern + 1 && filename[-1] == ':')) |
526 | { |
527 | char *drive_spec; |
528 | |
529 | ++dirlen; |
530 | drive_spec = __alloca (dirlen + 1); |
531 | *((char *) mempcpy (drive_spec, pattern, dirlen)) = '\0'; |
532 | /* For now, disallow wildcards in the drive spec, to |
533 | prevent infinite recursion in glob. */ |
534 | if (__glob_pattern_p (drive_spec, !(flags & GLOB_NOESCAPE))) |
535 | return GLOB_NOMATCH; |
536 | /* If this is "d:pattern", we need to copy ':' to DIRNAME |
537 | as well. If it's "d:/pattern", don't remove the slash |
538 | from "d:/", since "d:" and "d:/" are not the same.*/ |
539 | } |
540 | #endif |
541 | |
542 | if (glob_use_alloca (alloca_used, dirlen + 1)) |
543 | newp = alloca_account (dirlen + 1, alloca_used); |
544 | else |
545 | { |
546 | newp = malloc (dirlen + 1); |
547 | if (newp == NULL) |
548 | return GLOB_NOSPACE; |
549 | malloc_dirname = 1; |
550 | } |
551 | *((char *) mempcpy (newp, pattern, dirlen)) = '\0'; |
552 | dirname = newp; |
553 | ++filename; |
554 | |
555 | #if defined __MSDOS__ || defined WINDOWS32 |
556 | bool drive_root = (dirlen > 1 |
557 | && (dirname[dirlen - 1] == ':' |
558 | || (dirlen > 2 && dirname[dirlen - 2] == ':' |
559 | && dirname[dirlen - 1] == '/'))); |
560 | #else |
561 | bool drive_root = false; |
562 | #endif |
563 | |
564 | if (filename[0] == '\0' && dirlen > 1 && !drive_root) |
565 | /* "pattern/". Expand "pattern", appending slashes. */ |
566 | { |
567 | int orig_flags = flags; |
568 | if (!(flags & GLOB_NOESCAPE) && dirname[dirlen - 1] == '\\') |
569 | { |
570 | /* "pattern\\/". Remove the final backslash if it hasn't |
571 | been quoted. */ |
572 | char *p = (char *) &dirname[dirlen - 1]; |
573 | |
574 | while (p > dirname && p[-1] == '\\') --p; |
575 | if ((&dirname[dirlen] - p) & 1) |
576 | { |
577 | *(char *) &dirname[--dirlen] = '\0'; |
578 | flags &= ~(GLOB_NOCHECK | GLOB_NOMAGIC); |
579 | } |
580 | } |
581 | int val = glob (dirname, flags | GLOB_MARK, errfunc, pglob); |
582 | if (val == 0) |
583 | pglob->gl_flags = ((pglob->gl_flags & ~GLOB_MARK) |
584 | | (flags & GLOB_MARK)); |
585 | else if (val == GLOB_NOMATCH && flags != orig_flags) |
586 | { |
587 | /* Make sure globfree (&dirs); is a nop. */ |
588 | dirs.gl_pathv = NULL; |
589 | flags = orig_flags; |
590 | oldcount = pglob->gl_pathc + pglob->gl_offs; |
591 | goto no_matches; |
592 | } |
593 | retval = val; |
594 | goto out; |
595 | } |
596 | } |
597 | |
598 | if ((flags & (GLOB_TILDE|GLOB_TILDE_CHECK)) && dirname[0] == '~') |
599 | { |
600 | if (dirname[1] == '\0' || dirname[1] == '/' |
601 | || (!(flags & GLOB_NOESCAPE) && dirname[1] == '\\' |
602 | && (dirname[2] == '\0' || dirname[2] == '/'))) |
603 | { |
604 | /* Look up home directory. */ |
605 | char *home_dir = getenv ("HOME" ); |
606 | int malloc_home_dir = 0; |
607 | if (home_dir == NULL || home_dir[0] == '\0') |
608 | { |
609 | #ifdef WINDOWS32 |
610 | /* Windows NT defines HOMEDRIVE and HOMEPATH. But give |
611 | preference to HOME, because the user can change HOME. */ |
612 | const char *home_drive = getenv ("HOMEDRIVE" ); |
613 | const char *home_path = getenv ("HOMEPATH" ); |
614 | |
615 | if (home_drive != NULL && home_path != NULL) |
616 | { |
617 | size_t home_drive_len = strlen (home_drive); |
618 | size_t home_path_len = strlen (home_path); |
619 | char *mem = alloca (home_drive_len + home_path_len + 1); |
620 | |
621 | memcpy (mem, home_drive, home_drive_len); |
622 | memcpy (mem + home_drive_len, home_path, home_path_len + 1); |
623 | home_dir = mem; |
624 | } |
625 | else |
626 | home_dir = "c:/users/default" ; /* poor default */ |
627 | #else |
628 | int success; |
629 | char *name; |
630 | int malloc_name = 0; |
631 | size_t buflen = GET_LOGIN_NAME_MAX () + 1; |
632 | |
633 | if (buflen == 0) |
634 | /* 'sysconf' does not support _SC_LOGIN_NAME_MAX. Try |
635 | a moderate value. */ |
636 | buflen = 20; |
637 | if (glob_use_alloca (alloca_used, buflen)) |
638 | name = alloca_account (buflen, alloca_used); |
639 | else |
640 | { |
641 | name = malloc (buflen); |
642 | if (name == NULL) |
643 | { |
644 | retval = GLOB_NOSPACE; |
645 | goto out; |
646 | } |
647 | malloc_name = 1; |
648 | } |
649 | |
650 | success = __getlogin_r (name, buflen) == 0; |
651 | if (success) |
652 | { |
653 | struct passwd *p; |
654 | char *malloc_pwtmpbuf = NULL; |
655 | char *pwtmpbuf; |
656 | # if defined HAVE_GETPWNAM_R || defined _LIBC |
657 | long int pwbuflenmax = GETPW_R_SIZE_MAX (); |
658 | size_t pwbuflen = pwbuflenmax; |
659 | struct passwd pwbuf; |
660 | int save = errno; |
661 | |
662 | # ifndef _LIBC |
663 | if (! (0 < pwbuflenmax && pwbuflenmax <= SIZE_MAX)) |
664 | /* 'sysconf' does not support _SC_GETPW_R_SIZE_MAX. |
665 | Try a moderate value. */ |
666 | pwbuflen = 1024; |
667 | # endif |
668 | if (glob_use_alloca (alloca_used, pwbuflen)) |
669 | pwtmpbuf = alloca_account (pwbuflen, alloca_used); |
670 | else |
671 | { |
672 | pwtmpbuf = malloc (pwbuflen); |
673 | if (pwtmpbuf == NULL) |
674 | { |
675 | if (__glibc_unlikely (malloc_name)) |
676 | free (name); |
677 | retval = GLOB_NOSPACE; |
678 | goto out; |
679 | } |
680 | malloc_pwtmpbuf = pwtmpbuf; |
681 | } |
682 | |
683 | while (getpwnam_r (name, &pwbuf, pwtmpbuf, pwbuflen, &p) |
684 | != 0) |
685 | { |
686 | size_t newlen; |
687 | bool v; |
688 | if (errno != ERANGE) |
689 | { |
690 | p = NULL; |
691 | break; |
692 | } |
693 | v = size_add_wrapv (pwbuflen, pwbuflen, &newlen); |
694 | if (!v && malloc_pwtmpbuf == NULL |
695 | && glob_use_alloca (alloca_used, newlen)) |
696 | pwtmpbuf = extend_alloca_account (pwtmpbuf, pwbuflen, |
697 | newlen, alloca_used); |
698 | else |
699 | { |
700 | char *newp = (v ? NULL |
701 | : realloc (malloc_pwtmpbuf, newlen)); |
702 | if (newp == NULL) |
703 | { |
704 | free (malloc_pwtmpbuf); |
705 | if (__glibc_unlikely (malloc_name)) |
706 | free (name); |
707 | retval = GLOB_NOSPACE; |
708 | goto out; |
709 | } |
710 | malloc_pwtmpbuf = pwtmpbuf = newp; |
711 | } |
712 | pwbuflen = newlen; |
713 | __set_errno (save); |
714 | } |
715 | # else |
716 | p = getpwnam (name); |
717 | # endif |
718 | if (__glibc_unlikely (malloc_name)) |
719 | free (name); |
720 | if (p != NULL) |
721 | { |
722 | if (malloc_pwtmpbuf == NULL) |
723 | home_dir = p->pw_dir; |
724 | else |
725 | { |
726 | size_t home_dir_len = strlen (p->pw_dir) + 1; |
727 | if (glob_use_alloca (alloca_used, home_dir_len)) |
728 | home_dir = alloca_account (home_dir_len, |
729 | alloca_used); |
730 | else |
731 | { |
732 | home_dir = malloc (home_dir_len); |
733 | if (home_dir == NULL) |
734 | { |
735 | free (pwtmpbuf); |
736 | retval = GLOB_NOSPACE; |
737 | goto out; |
738 | } |
739 | malloc_home_dir = 1; |
740 | } |
741 | memcpy (home_dir, p->pw_dir, home_dir_len); |
742 | } |
743 | } |
744 | free (malloc_pwtmpbuf); |
745 | } |
746 | else |
747 | { |
748 | if (__glibc_unlikely (malloc_name)) |
749 | free (name); |
750 | } |
751 | #endif /* WINDOWS32 */ |
752 | } |
753 | if (home_dir == NULL || home_dir[0] == '\0') |
754 | { |
755 | if (__glibc_unlikely (malloc_home_dir)) |
756 | free (home_dir); |
757 | if (flags & GLOB_TILDE_CHECK) |
758 | { |
759 | retval = GLOB_NOMATCH; |
760 | goto out; |
761 | } |
762 | else |
763 | { |
764 | home_dir = (char *) "~" ; /* No luck. */ |
765 | malloc_home_dir = 0; |
766 | } |
767 | } |
768 | /* Now construct the full directory. */ |
769 | if (dirname[1] == '\0') |
770 | { |
771 | if (__glibc_unlikely (malloc_dirname)) |
772 | free (dirname); |
773 | |
774 | dirname = home_dir; |
775 | dirlen = strlen (dirname); |
776 | malloc_dirname = malloc_home_dir; |
777 | } |
778 | else |
779 | { |
780 | char *newp; |
781 | size_t home_len = strlen (home_dir); |
782 | int use_alloca = glob_use_alloca (alloca_used, home_len + dirlen); |
783 | if (use_alloca) |
784 | newp = alloca_account (home_len + dirlen, alloca_used); |
785 | else |
786 | { |
787 | newp = malloc (home_len + dirlen); |
788 | if (newp == NULL) |
789 | { |
790 | if (__glibc_unlikely (malloc_home_dir)) |
791 | free (home_dir); |
792 | retval = GLOB_NOSPACE; |
793 | goto out; |
794 | } |
795 | } |
796 | |
797 | mempcpy (mempcpy (newp, home_dir, home_len), |
798 | &dirname[1], dirlen); |
799 | |
800 | if (__glibc_unlikely (malloc_dirname)) |
801 | free (dirname); |
802 | |
803 | dirname = newp; |
804 | dirlen += home_len - 1; |
805 | malloc_dirname = !use_alloca; |
806 | |
807 | if (__glibc_unlikely (malloc_home_dir)) |
808 | free (home_dir); |
809 | } |
810 | dirname_modified = 1; |
811 | } |
812 | else |
813 | { |
814 | #ifndef WINDOWS32 |
815 | char *end_name = strchr (dirname, '/'); |
816 | char *user_name; |
817 | int malloc_user_name = 0; |
818 | char *unescape = NULL; |
819 | |
820 | if (!(flags & GLOB_NOESCAPE)) |
821 | { |
822 | if (end_name == NULL) |
823 | { |
824 | unescape = strchr (dirname, '\\'); |
825 | if (unescape) |
826 | end_name = strchr (unescape, '\0'); |
827 | } |
828 | else |
829 | unescape = memchr (dirname, '\\', end_name - dirname); |
830 | } |
831 | if (end_name == NULL) |
832 | user_name = dirname + 1; |
833 | else |
834 | { |
835 | char *newp; |
836 | if (glob_use_alloca (alloca_used, end_name - dirname)) |
837 | newp = alloca_account (end_name - dirname, alloca_used); |
838 | else |
839 | { |
840 | newp = malloc (end_name - dirname); |
841 | if (newp == NULL) |
842 | { |
843 | retval = GLOB_NOSPACE; |
844 | goto out; |
845 | } |
846 | malloc_user_name = 1; |
847 | } |
848 | if (unescape != NULL) |
849 | { |
850 | char *p = mempcpy (newp, dirname + 1, |
851 | unescape - dirname - 1); |
852 | char *q = unescape; |
853 | while (q != end_name) |
854 | { |
855 | if (*q == '\\') |
856 | { |
857 | if (q + 1 == end_name) |
858 | { |
859 | /* "~fo\\o\\" unescape to user_name "foo\\", |
860 | but "~fo\\o\\/" unescape to user_name |
861 | "foo". */ |
862 | if (filename == NULL) |
863 | *p++ = '\\'; |
864 | break; |
865 | } |
866 | ++q; |
867 | } |
868 | *p++ = *q++; |
869 | } |
870 | *p = '\0'; |
871 | } |
872 | else |
873 | *((char *) mempcpy (newp, dirname + 1, end_name - dirname - 1)) |
874 | = '\0'; |
875 | user_name = newp; |
876 | } |
877 | |
878 | /* Look up specific user's home directory. */ |
879 | { |
880 | struct passwd *p; |
881 | char *malloc_pwtmpbuf = NULL; |
882 | # if defined HAVE_GETPWNAM_R || defined _LIBC |
883 | long int buflenmax = GETPW_R_SIZE_MAX (); |
884 | size_t buflen = buflenmax; |
885 | char *pwtmpbuf; |
886 | struct passwd pwbuf; |
887 | int save = errno; |
888 | |
889 | # ifndef _LIBC |
890 | if (! (0 <= buflenmax && buflenmax <= SIZE_MAX)) |
891 | /* Perhaps 'sysconf' does not support _SC_GETPW_R_SIZE_MAX. Try a |
892 | moderate value. */ |
893 | buflen = 1024; |
894 | # endif |
895 | if (glob_use_alloca (alloca_used, buflen)) |
896 | pwtmpbuf = alloca_account (buflen, alloca_used); |
897 | else |
898 | { |
899 | pwtmpbuf = malloc (buflen); |
900 | if (pwtmpbuf == NULL) |
901 | { |
902 | nomem_getpw: |
903 | if (__glibc_unlikely (malloc_user_name)) |
904 | free (user_name); |
905 | retval = GLOB_NOSPACE; |
906 | goto out; |
907 | } |
908 | malloc_pwtmpbuf = pwtmpbuf; |
909 | } |
910 | |
911 | while (getpwnam_r (user_name, &pwbuf, pwtmpbuf, buflen, &p) != 0) |
912 | { |
913 | size_t newlen; |
914 | bool v; |
915 | if (errno != ERANGE) |
916 | { |
917 | p = NULL; |
918 | break; |
919 | } |
920 | v = size_add_wrapv (buflen, buflen, &newlen); |
921 | if (!v && malloc_pwtmpbuf == NULL |
922 | && glob_use_alloca (alloca_used, newlen)) |
923 | pwtmpbuf = extend_alloca_account (pwtmpbuf, buflen, |
924 | newlen, alloca_used); |
925 | else |
926 | { |
927 | char *newp = v ? NULL : realloc (malloc_pwtmpbuf, newlen); |
928 | if (newp == NULL) |
929 | { |
930 | free (malloc_pwtmpbuf); |
931 | goto nomem_getpw; |
932 | } |
933 | malloc_pwtmpbuf = pwtmpbuf = newp; |
934 | } |
935 | __set_errno (save); |
936 | } |
937 | # else |
938 | p = getpwnam (user_name); |
939 | # endif |
940 | |
941 | if (__glibc_unlikely (malloc_user_name)) |
942 | free (user_name); |
943 | |
944 | /* If we found a home directory use this. */ |
945 | if (p != NULL) |
946 | { |
947 | size_t home_len = strlen (p->pw_dir); |
948 | size_t rest_len = end_name == NULL ? 0 : strlen (end_name); |
949 | |
950 | if (__glibc_unlikely (malloc_dirname)) |
951 | free (dirname); |
952 | malloc_dirname = 0; |
953 | |
954 | if (glob_use_alloca (alloca_used, home_len + rest_len + 1)) |
955 | dirname = alloca_account (home_len + rest_len + 1, |
956 | alloca_used); |
957 | else |
958 | { |
959 | dirname = malloc (home_len + rest_len + 1); |
960 | if (dirname == NULL) |
961 | { |
962 | free (malloc_pwtmpbuf); |
963 | retval = GLOB_NOSPACE; |
964 | goto out; |
965 | } |
966 | malloc_dirname = 1; |
967 | } |
968 | *((char *) mempcpy (mempcpy (dirname, p->pw_dir, home_len), |
969 | end_name, rest_len)) = '\0'; |
970 | |
971 | dirlen = home_len + rest_len; |
972 | dirname_modified = 1; |
973 | |
974 | free (malloc_pwtmpbuf); |
975 | } |
976 | else |
977 | { |
978 | free (malloc_pwtmpbuf); |
979 | |
980 | if (flags & GLOB_TILDE_CHECK) |
981 | { |
982 | /* We have to regard it as an error if we cannot find the |
983 | home directory. */ |
984 | retval = GLOB_NOMATCH; |
985 | goto out; |
986 | } |
987 | } |
988 | } |
989 | #endif /* !WINDOWS32 */ |
990 | } |
991 | } |
992 | |
993 | /* Now test whether we looked for "~" or "~NAME". In this case we |
994 | can give the answer now. */ |
995 | if (filename == NULL) |
996 | { |
997 | struct stat st; |
998 | struct_stat64 st64; |
999 | |
1000 | /* Return the directory if we don't check for error or if it exists. */ |
1001 | if ((flags & GLOB_NOCHECK) |
1002 | || (((__builtin_expect (flags & GLOB_ALTDIRFUNC, 0)) |
1003 | ? ((*pglob->gl_stat) (dirname, &st) == 0 |
1004 | && S_ISDIR (st.st_mode)) |
1005 | : (__stat64 (dirname, &st64) == 0 && S_ISDIR (st64.st_mode))))) |
1006 | { |
1007 | size_t newcount = pglob->gl_pathc + pglob->gl_offs; |
1008 | char **new_gl_pathv; |
1009 | |
1010 | if (newcount > SIZE_MAX / sizeof (char *) - 2) |
1011 | { |
1012 | nospace: |
1013 | free (pglob->gl_pathv); |
1014 | pglob->gl_pathv = NULL; |
1015 | pglob->gl_pathc = 0; |
1016 | retval = GLOB_NOSPACE; |
1017 | goto out; |
1018 | } |
1019 | |
1020 | new_gl_pathv = realloc (pglob->gl_pathv, |
1021 | (newcount + 2) * sizeof (char *)); |
1022 | if (new_gl_pathv == NULL) |
1023 | goto nospace; |
1024 | pglob->gl_pathv = new_gl_pathv; |
1025 | |
1026 | if (flags & GLOB_MARK) |
1027 | { |
1028 | char *p; |
1029 | pglob->gl_pathv[newcount] = malloc (dirlen + 2); |
1030 | if (pglob->gl_pathv[newcount] == NULL) |
1031 | goto nospace; |
1032 | p = mempcpy (pglob->gl_pathv[newcount], dirname, dirlen); |
1033 | p[0] = '/'; |
1034 | p[1] = '\0'; |
1035 | if (__glibc_unlikely (malloc_dirname)) |
1036 | free (dirname); |
1037 | } |
1038 | else |
1039 | { |
1040 | if (__glibc_unlikely (malloc_dirname)) |
1041 | pglob->gl_pathv[newcount] = dirname; |
1042 | else |
1043 | { |
1044 | pglob->gl_pathv[newcount] = strdup (dirname); |
1045 | if (pglob->gl_pathv[newcount] == NULL) |
1046 | goto nospace; |
1047 | } |
1048 | } |
1049 | pglob->gl_pathv[++newcount] = NULL; |
1050 | ++pglob->gl_pathc; |
1051 | pglob->gl_flags = flags; |
1052 | |
1053 | return 0; |
1054 | } |
1055 | |
1056 | /* Not found. */ |
1057 | retval = GLOB_NOMATCH; |
1058 | goto out; |
1059 | } |
1060 | |
1061 | meta = __glob_pattern_type (dirname, !(flags & GLOB_NOESCAPE)); |
1062 | /* meta is 1 if correct glob pattern containing metacharacters. |
1063 | If meta has bit (1 << 2) set, it means there was an unterminated |
1064 | [ which we handle the same, using fnmatch. Broken unterminated |
1065 | pattern bracket expressions ought to be rare enough that it is |
1066 | not worth special casing them, fnmatch will do the right thing. */ |
1067 | if (meta & 5) |
1068 | { |
1069 | /* The directory name contains metacharacters, so we |
1070 | have to glob for the directory, and then glob for |
1071 | the pattern in each directory found. */ |
1072 | size_t i; |
1073 | |
1074 | if (!(flags & GLOB_NOESCAPE) && dirlen > 0 && dirname[dirlen - 1] == '\\') |
1075 | { |
1076 | /* "foo\\/bar". Remove the final backslash from dirname |
1077 | if it has not been quoted. */ |
1078 | char *p = (char *) &dirname[dirlen - 1]; |
1079 | |
1080 | while (p > dirname && p[-1] == '\\') --p; |
1081 | if ((&dirname[dirlen] - p) & 1) |
1082 | *(char *) &dirname[--dirlen] = '\0'; |
1083 | } |
1084 | |
1085 | if (__glibc_unlikely ((flags & GLOB_ALTDIRFUNC) != 0)) |
1086 | { |
1087 | /* Use the alternative access functions also in the recursive |
1088 | call. */ |
1089 | dirs.gl_opendir = pglob->gl_opendir; |
1090 | dirs.gl_readdir = pglob->gl_readdir; |
1091 | dirs.gl_closedir = pglob->gl_closedir; |
1092 | dirs.gl_stat = pglob->gl_stat; |
1093 | dirs.gl_lstat = pglob->gl_lstat; |
1094 | } |
1095 | |
1096 | status = glob (dirname, |
1097 | ((flags & (GLOB_ERR | GLOB_NOESCAPE |
1098 | | GLOB_ALTDIRFUNC)) |
1099 | | GLOB_NOSORT | GLOB_ONLYDIR), |
1100 | errfunc, &dirs); |
1101 | if (status != 0) |
1102 | { |
1103 | if ((flags & GLOB_NOCHECK) == 0 || status != GLOB_NOMATCH) |
1104 | { |
1105 | retval = status; |
1106 | goto out; |
1107 | } |
1108 | goto no_matches; |
1109 | } |
1110 | |
1111 | /* We have successfully globbed the preceding directory name. |
1112 | For each name we found, call glob_in_dir on it and FILENAME, |
1113 | appending the results to PGLOB. */ |
1114 | for (i = 0; i < dirs.gl_pathc; ++i) |
1115 | { |
1116 | size_t old_pathc; |
1117 | |
1118 | old_pathc = pglob->gl_pathc; |
1119 | status = glob_in_dir (filename, dirs.gl_pathv[i], |
1120 | ((flags | GLOB_APPEND) |
1121 | & ~(GLOB_NOCHECK | GLOB_NOMAGIC)), |
1122 | errfunc, pglob, alloca_used); |
1123 | if (status == GLOB_NOMATCH) |
1124 | /* No matches in this directory. Try the next. */ |
1125 | continue; |
1126 | |
1127 | if (status != 0) |
1128 | { |
1129 | globfree (&dirs); |
1130 | globfree (pglob); |
1131 | pglob->gl_pathc = 0; |
1132 | retval = status; |
1133 | goto out; |
1134 | } |
1135 | |
1136 | /* Stick the directory on the front of each name. */ |
1137 | if (prefix_array (dirs.gl_pathv[i], |
1138 | &pglob->gl_pathv[old_pathc + pglob->gl_offs], |
1139 | pglob->gl_pathc - old_pathc)) |
1140 | { |
1141 | globfree (&dirs); |
1142 | globfree (pglob); |
1143 | pglob->gl_pathc = 0; |
1144 | retval = GLOB_NOSPACE; |
1145 | goto out; |
1146 | } |
1147 | } |
1148 | |
1149 | flags |= GLOB_MAGCHAR; |
1150 | |
1151 | /* We have ignored the GLOB_NOCHECK flag in the 'glob_in_dir' calls. |
1152 | But if we have not found any matching entry and the GLOB_NOCHECK |
1153 | flag was set we must return the input pattern itself. */ |
1154 | if (pglob->gl_pathc + pglob->gl_offs == oldcount) |
1155 | { |
1156 | no_matches: |
1157 | /* No matches. */ |
1158 | if (flags & GLOB_NOCHECK) |
1159 | { |
1160 | size_t newcount = pglob->gl_pathc + pglob->gl_offs; |
1161 | char **new_gl_pathv; |
1162 | |
1163 | if (newcount > SIZE_MAX / sizeof (char *) - 2) |
1164 | { |
1165 | nospace2: |
1166 | globfree (&dirs); |
1167 | retval = GLOB_NOSPACE; |
1168 | goto out; |
1169 | } |
1170 | |
1171 | new_gl_pathv = realloc (pglob->gl_pathv, |
1172 | (newcount + 2) * sizeof (char *)); |
1173 | if (new_gl_pathv == NULL) |
1174 | goto nospace2; |
1175 | pglob->gl_pathv = new_gl_pathv; |
1176 | |
1177 | pglob->gl_pathv[newcount] = strdup (pattern); |
1178 | if (pglob->gl_pathv[newcount] == NULL) |
1179 | { |
1180 | globfree (&dirs); |
1181 | globfree (pglob); |
1182 | pglob->gl_pathc = 0; |
1183 | retval = GLOB_NOSPACE; |
1184 | goto out; |
1185 | } |
1186 | |
1187 | ++pglob->gl_pathc; |
1188 | ++newcount; |
1189 | |
1190 | pglob->gl_pathv[newcount] = NULL; |
1191 | pglob->gl_flags = flags; |
1192 | } |
1193 | else |
1194 | { |
1195 | globfree (&dirs); |
1196 | retval = GLOB_NOMATCH; |
1197 | goto out; |
1198 | } |
1199 | } |
1200 | |
1201 | globfree (&dirs); |
1202 | } |
1203 | else |
1204 | { |
1205 | size_t old_pathc = pglob->gl_pathc; |
1206 | int orig_flags = flags; |
1207 | |
1208 | if (meta & 2) |
1209 | { |
1210 | char *p = strchr (dirname, '\\'), *q; |
1211 | /* We need to unescape the dirname string. It is certainly |
1212 | allocated by alloca, as otherwise filename would be NULL |
1213 | or dirname wouldn't contain backslashes. */ |
1214 | q = p; |
1215 | do |
1216 | { |
1217 | if (*p == '\\') |
1218 | { |
1219 | *q = *++p; |
1220 | --dirlen; |
1221 | } |
1222 | else |
1223 | *q = *p; |
1224 | ++q; |
1225 | } |
1226 | while (*p++ != '\0'); |
1227 | dirname_modified = 1; |
1228 | } |
1229 | if (dirname_modified) |
1230 | flags &= ~(GLOB_NOCHECK | GLOB_NOMAGIC); |
1231 | status = glob_in_dir (filename, dirname, flags, errfunc, pglob, |
1232 | alloca_used); |
1233 | if (status != 0) |
1234 | { |
1235 | if (status == GLOB_NOMATCH && flags != orig_flags |
1236 | && pglob->gl_pathc + pglob->gl_offs == oldcount) |
1237 | { |
1238 | /* Make sure globfree (&dirs); is a nop. */ |
1239 | dirs.gl_pathv = NULL; |
1240 | flags = orig_flags; |
1241 | goto no_matches; |
1242 | } |
1243 | retval = status; |
1244 | goto out; |
1245 | } |
1246 | |
1247 | if (dirlen > 0) |
1248 | { |
1249 | /* Stick the directory on the front of each name. */ |
1250 | if (prefix_array (dirname, |
1251 | &pglob->gl_pathv[old_pathc + pglob->gl_offs], |
1252 | pglob->gl_pathc - old_pathc)) |
1253 | { |
1254 | globfree (pglob); |
1255 | pglob->gl_pathc = 0; |
1256 | retval = GLOB_NOSPACE; |
1257 | goto out; |
1258 | } |
1259 | } |
1260 | } |
1261 | |
1262 | if (flags & GLOB_MARK) |
1263 | { |
1264 | /* Append slashes to directory names. */ |
1265 | size_t i; |
1266 | struct stat st; |
1267 | struct_stat64 st64; |
1268 | |
1269 | for (i = oldcount; i < pglob->gl_pathc + pglob->gl_offs; ++i) |
1270 | if ((__builtin_expect (flags & GLOB_ALTDIRFUNC, 0) |
1271 | ? ((*pglob->gl_stat) (pglob->gl_pathv[i], &st) == 0 |
1272 | && S_ISDIR (st.st_mode)) |
1273 | : (__stat64 (pglob->gl_pathv[i], &st64) == 0 |
1274 | && S_ISDIR (st64.st_mode)))) |
1275 | { |
1276 | size_t len = strlen (pglob->gl_pathv[i]) + 2; |
1277 | char *new = realloc (pglob->gl_pathv[i], len); |
1278 | if (new == NULL) |
1279 | { |
1280 | globfree (pglob); |
1281 | pglob->gl_pathc = 0; |
1282 | retval = GLOB_NOSPACE; |
1283 | goto out; |
1284 | } |
1285 | strcpy (&new[len - 2], "/" ); |
1286 | pglob->gl_pathv[i] = new; |
1287 | } |
1288 | } |
1289 | |
1290 | if (!(flags & GLOB_NOSORT)) |
1291 | { |
1292 | /* Sort the vector. */ |
1293 | qsort (&pglob->gl_pathv[oldcount], |
1294 | pglob->gl_pathc + pglob->gl_offs - oldcount, |
1295 | sizeof (char *), collated_compare); |
1296 | } |
1297 | |
1298 | out: |
1299 | if (__glibc_unlikely (malloc_dirname)) |
1300 | free (dirname); |
1301 | |
1302 | return retval; |
1303 | } |
1304 | #if defined _LIBC && !defined glob |
1305 | libc_hidden_def (glob) |
1306 | #endif |
1307 | |
1308 | |
1309 | /* Do a collated comparison of A and B. */ |
1310 | static int |
1311 | collated_compare (const void *a, const void *b) |
1312 | { |
1313 | char *const *ps1 = a; char *s1 = *ps1; |
1314 | char *const *ps2 = b; char *s2 = *ps2; |
1315 | |
1316 | if (s1 == s2) |
1317 | return 0; |
1318 | if (s1 == NULL) |
1319 | return 1; |
1320 | if (s2 == NULL) |
1321 | return -1; |
1322 | return strcoll (s1, s2); |
1323 | } |
1324 | |
1325 | |
1326 | /* Prepend DIRNAME to each of N members of ARRAY, replacing ARRAY's |
1327 | elements in place. Return nonzero if out of memory, zero if successful. |
1328 | A slash is inserted between DIRNAME and each elt of ARRAY, |
1329 | unless DIRNAME is just "/". Each old element of ARRAY is freed. */ |
1330 | static int |
1331 | prefix_array (const char *dirname, char **array, size_t n) |
1332 | { |
1333 | size_t i; |
1334 | size_t dirlen = strlen (dirname); |
1335 | char dirsep_char = '/'; |
1336 | |
1337 | if (dirlen == 1 && dirname[0] == '/') |
1338 | /* DIRNAME is just "/", so normal prepending would get us "//foo". |
1339 | We want "/foo" instead, so don't prepend any chars from DIRNAME. */ |
1340 | dirlen = 0; |
1341 | |
1342 | #if defined __MSDOS__ || defined WINDOWS32 |
1343 | if (dirlen > 1) |
1344 | { |
1345 | if (dirname[dirlen - 1] == '/' && dirname[dirlen - 2] == ':') |
1346 | /* DIRNAME is "d:/". Don't prepend the slash from DIRNAME. */ |
1347 | --dirlen; |
1348 | else if (dirname[dirlen - 1] == ':') |
1349 | { |
1350 | /* DIRNAME is "d:". Use ':' instead of '/'. */ |
1351 | --dirlen; |
1352 | dirsep_char = ':'; |
1353 | } |
1354 | } |
1355 | #endif |
1356 | |
1357 | for (i = 0; i < n; ++i) |
1358 | { |
1359 | size_t eltlen = strlen (array[i]) + 1; |
1360 | char *new = malloc (dirlen + 1 + eltlen); |
1361 | if (new == NULL) |
1362 | { |
1363 | while (i > 0) |
1364 | free (array[--i]); |
1365 | return 1; |
1366 | } |
1367 | |
1368 | { |
1369 | char *endp = mempcpy (new, dirname, dirlen); |
1370 | *endp++ = dirsep_char; |
1371 | mempcpy (endp, array[i], eltlen); |
1372 | } |
1373 | free (array[i]); |
1374 | array[i] = new; |
1375 | } |
1376 | |
1377 | return 0; |
1378 | } |
1379 | |
1380 | /* We put this in a separate function mainly to allow the memory |
1381 | allocated with alloca to be recycled. */ |
1382 | static int |
1383 | __attribute_noinline__ |
1384 | link_stat (const char *dir, size_t dirlen, const char *fname, |
1385 | glob_t *pglob |
1386 | # if !defined _LIBC && !HAVE_FSTATAT |
1387 | , int flags |
1388 | # endif |
1389 | ) |
1390 | { |
1391 | size_t fnamelen = strlen (fname); |
1392 | char *fullname = __alloca (dirlen + 1 + fnamelen + 1); |
1393 | struct stat st; |
1394 | |
1395 | mempcpy (mempcpy (mempcpy (fullname, dir, dirlen), "/" , 1), |
1396 | fname, fnamelen + 1); |
1397 | |
1398 | # if !defined _LIBC && !HAVE_FSTATAT |
1399 | if (__builtin_expect ((flags & GLOB_ALTDIRFUNC) == 0, 1)) |
1400 | { |
1401 | struct_stat64 st64; |
1402 | return __stat64 (fullname, &st64); |
1403 | } |
1404 | # endif |
1405 | return (*pglob->gl_stat) (fullname, &st); |
1406 | } |
1407 | |
1408 | /* Return true if DIR/FNAME exists. */ |
1409 | static int |
1410 | link_exists_p (int dfd, const char *dir, size_t dirlen, const char *fname, |
1411 | glob_t *pglob, int flags) |
1412 | { |
1413 | int status; |
1414 | # if defined _LIBC || HAVE_FSTATAT |
1415 | if (__builtin_expect (flags & GLOB_ALTDIRFUNC, 0)) |
1416 | status = link_stat (dir, dirlen, fname, pglob); |
1417 | else |
1418 | { |
1419 | /* dfd cannot be -1 here, because dirfd never returns -1 on |
1420 | glibc, or on hosts that have fstatat. */ |
1421 | struct_stat64 st64; |
1422 | status = __fxstatat64 (_STAT_VER, dfd, fname, &st64, 0); |
1423 | } |
1424 | # else |
1425 | status = link_stat (dir, dirlen, fname, pglob, flags); |
1426 | # endif |
1427 | return status == 0 || errno == EOVERFLOW; |
1428 | } |
1429 | |
1430 | /* Like 'glob', but PATTERN is a final pathname component, |
1431 | and matches are searched for in DIRECTORY. |
1432 | The GLOB_NOSORT bit in FLAGS is ignored. No sorting is ever done. |
1433 | The GLOB_APPEND flag is assumed to be set (always appends). */ |
1434 | static int |
1435 | glob_in_dir (const char *pattern, const char *directory, int flags, |
1436 | int (*errfunc) (const char *, int), |
1437 | glob_t *pglob, size_t alloca_used) |
1438 | { |
1439 | size_t dirlen = strlen (directory); |
1440 | void *stream = NULL; |
1441 | # define GLOBNAMES_MEMBERS(nnames) \ |
1442 | struct globnames *next; size_t count; char *name[nnames]; |
1443 | struct globnames { GLOBNAMES_MEMBERS (FLEXIBLE_ARRAY_MEMBER) }; |
1444 | struct { GLOBNAMES_MEMBERS (64) } init_names_buf; |
1445 | struct globnames *init_names = (struct globnames *) &init_names_buf; |
1446 | struct globnames *names = init_names; |
1447 | struct globnames *names_alloca = init_names; |
1448 | size_t nfound = 0; |
1449 | size_t cur = 0; |
1450 | int meta; |
1451 | int save; |
1452 | int result; |
1453 | |
1454 | alloca_used += sizeof init_names_buf; |
1455 | |
1456 | init_names->next = NULL; |
1457 | init_names->count = ((sizeof init_names_buf |
1458 | - offsetof (struct globnames, name)) |
1459 | / sizeof init_names->name[0]); |
1460 | |
1461 | meta = __glob_pattern_type (pattern, !(flags & GLOB_NOESCAPE)); |
1462 | if (meta == 0 && (flags & (GLOB_NOCHECK|GLOB_NOMAGIC))) |
1463 | { |
1464 | /* We need not do any tests. The PATTERN contains no meta |
1465 | characters and we must not return an error therefore the |
1466 | result will always contain exactly one name. */ |
1467 | flags |= GLOB_NOCHECK; |
1468 | } |
1469 | else if (meta == 0) |
1470 | { |
1471 | /* Since we use the normal file functions we can also use stat() |
1472 | to verify the file is there. */ |
1473 | union |
1474 | { |
1475 | struct stat st; |
1476 | struct_stat64 st64; |
1477 | } ust; |
1478 | size_t patlen = strlen (pattern); |
1479 | size_t fullsize; |
1480 | bool alloca_fullname |
1481 | = (! size_add_wrapv (dirlen + 1, patlen + 1, &fullsize) |
1482 | && glob_use_alloca (alloca_used, fullsize)); |
1483 | char *fullname; |
1484 | if (alloca_fullname) |
1485 | fullname = alloca_account (fullsize, alloca_used); |
1486 | else |
1487 | { |
1488 | fullname = malloc (fullsize); |
1489 | if (fullname == NULL) |
1490 | return GLOB_NOSPACE; |
1491 | } |
1492 | |
1493 | mempcpy (mempcpy (mempcpy (fullname, directory, dirlen), |
1494 | "/" , 1), |
1495 | pattern, patlen + 1); |
1496 | if (((__builtin_expect (flags & GLOB_ALTDIRFUNC, 0) |
1497 | ? (*pglob->gl_stat) (fullname, &ust.st) |
1498 | : __stat64 (fullname, &ust.st64)) |
1499 | == 0) |
1500 | || errno == EOVERFLOW) |
1501 | /* We found this file to be existing. Now tell the rest |
1502 | of the function to copy this name into the result. */ |
1503 | flags |= GLOB_NOCHECK; |
1504 | |
1505 | if (__glibc_unlikely (!alloca_fullname)) |
1506 | free (fullname); |
1507 | } |
1508 | else |
1509 | { |
1510 | stream = (__builtin_expect (flags & GLOB_ALTDIRFUNC, 0) |
1511 | ? (*pglob->gl_opendir) (directory) |
1512 | : opendir (directory)); |
1513 | if (stream == NULL) |
1514 | { |
1515 | if (errno != ENOTDIR |
1516 | && ((errfunc != NULL && (*errfunc) (directory, errno)) |
1517 | || (flags & GLOB_ERR))) |
1518 | return GLOB_ABORTED; |
1519 | } |
1520 | else |
1521 | { |
1522 | int dfd = (__builtin_expect (flags & GLOB_ALTDIRFUNC, 0) |
1523 | ? -1 : dirfd ((DIR *) stream)); |
1524 | int fnm_flags = ((!(flags & GLOB_PERIOD) ? FNM_PERIOD : 0) |
1525 | | ((flags & GLOB_NOESCAPE) ? FNM_NOESCAPE : 0)); |
1526 | flags |= GLOB_MAGCHAR; |
1527 | |
1528 | while (1) |
1529 | { |
1530 | struct readdir_result d; |
1531 | { |
1532 | if (__builtin_expect (flags & GLOB_ALTDIRFUNC, 0)) |
1533 | d = convert_dirent (GL_READDIR (pglob, stream)); |
1534 | else |
1535 | { |
1536 | #ifdef COMPILE_GLOB64 |
1537 | d = convert_dirent (__readdir (stream)); |
1538 | #else |
1539 | d = convert_dirent64 (__readdir64 (stream)); |
1540 | #endif |
1541 | } |
1542 | } |
1543 | if (d.name == NULL) |
1544 | break; |
1545 | if (readdir_result_skip_entry (d)) |
1546 | continue; |
1547 | |
1548 | /* If we shall match only directories use the information |
1549 | provided by the dirent call if possible. */ |
1550 | if (flags & GLOB_ONLYDIR) |
1551 | switch (readdir_result_type (d)) |
1552 | { |
1553 | case DT_DIR: case DT_LNK: case DT_UNKNOWN: break; |
1554 | default: continue; |
1555 | } |
1556 | |
1557 | if (fnmatch (pattern, d.name, fnm_flags) == 0) |
1558 | { |
1559 | /* If the file we found is a symlink we have to |
1560 | make sure the target file exists. */ |
1561 | dirent_type type = readdir_result_type (d); |
1562 | if (! (type == DT_LNK || type == DT_UNKNOWN) |
1563 | || link_exists_p (dfd, directory, dirlen, d.name, |
1564 | pglob, flags)) |
1565 | { |
1566 | if (cur == names->count) |
1567 | { |
1568 | struct globnames *newnames; |
1569 | size_t count = names->count * 2; |
1570 | size_t nameoff = offsetof (struct globnames, name); |
1571 | size_t size = FLEXSIZEOF (struct globnames, name, |
1572 | count * sizeof (char *)); |
1573 | if ((SIZE_MAX - nameoff) / 2 / sizeof (char *) |
1574 | < names->count) |
1575 | goto memory_error; |
1576 | if (glob_use_alloca (alloca_used, size)) |
1577 | newnames = names_alloca |
1578 | = alloca_account (size, alloca_used); |
1579 | else if ((newnames = malloc (size)) |
1580 | == NULL) |
1581 | goto memory_error; |
1582 | newnames->count = count; |
1583 | newnames->next = names; |
1584 | names = newnames; |
1585 | cur = 0; |
1586 | } |
1587 | names->name[cur] = strdup (d.name); |
1588 | if (names->name[cur] == NULL) |
1589 | goto memory_error; |
1590 | ++cur; |
1591 | ++nfound; |
1592 | if (SIZE_MAX - pglob->gl_offs <= nfound) |
1593 | goto memory_error; |
1594 | } |
1595 | } |
1596 | } |
1597 | } |
1598 | } |
1599 | |
1600 | if (nfound == 0 && (flags & GLOB_NOCHECK)) |
1601 | { |
1602 | size_t len = strlen (pattern); |
1603 | nfound = 1; |
1604 | names->name[cur] = malloc (len + 1); |
1605 | if (names->name[cur] == NULL) |
1606 | goto memory_error; |
1607 | *((char *) mempcpy (names->name[cur++], pattern, len)) = '\0'; |
1608 | } |
1609 | |
1610 | result = GLOB_NOMATCH; |
1611 | if (nfound != 0) |
1612 | { |
1613 | char **new_gl_pathv; |
1614 | result = 0; |
1615 | |
1616 | if (SIZE_MAX / sizeof (char *) - pglob->gl_pathc |
1617 | < pglob->gl_offs + nfound + 1) |
1618 | goto memory_error; |
1619 | |
1620 | new_gl_pathv |
1621 | = realloc (pglob->gl_pathv, |
1622 | (pglob->gl_pathc + pglob->gl_offs + nfound + 1) |
1623 | * sizeof (char *)); |
1624 | |
1625 | if (new_gl_pathv == NULL) |
1626 | { |
1627 | memory_error: |
1628 | while (1) |
1629 | { |
1630 | struct globnames *old = names; |
1631 | for (size_t i = 0; i < cur; ++i) |
1632 | free (names->name[i]); |
1633 | names = names->next; |
1634 | /* NB: we will not leak memory here if we exit without |
1635 | freeing the current block assigned to OLD. At least |
1636 | the very first block is always allocated on the stack |
1637 | and this is the block assigned to OLD here. */ |
1638 | if (names == NULL) |
1639 | { |
1640 | assert (old == init_names); |
1641 | break; |
1642 | } |
1643 | cur = names->count; |
1644 | if (old == names_alloca) |
1645 | names_alloca = names; |
1646 | else |
1647 | free (old); |
1648 | } |
1649 | result = GLOB_NOSPACE; |
1650 | } |
1651 | else |
1652 | { |
1653 | while (1) |
1654 | { |
1655 | struct globnames *old = names; |
1656 | for (size_t i = 0; i < cur; ++i) |
1657 | new_gl_pathv[pglob->gl_offs + pglob->gl_pathc++] |
1658 | = names->name[i]; |
1659 | names = names->next; |
1660 | /* NB: we will not leak memory here if we exit without |
1661 | freeing the current block assigned to OLD. At least |
1662 | the very first block is always allocated on the stack |
1663 | and this is the block assigned to OLD here. */ |
1664 | if (names == NULL) |
1665 | { |
1666 | assert (old == init_names); |
1667 | break; |
1668 | } |
1669 | cur = names->count; |
1670 | if (old == names_alloca) |
1671 | names_alloca = names; |
1672 | else |
1673 | free (old); |
1674 | } |
1675 | |
1676 | pglob->gl_pathv = new_gl_pathv; |
1677 | |
1678 | pglob->gl_pathv[pglob->gl_offs + pglob->gl_pathc] = NULL; |
1679 | |
1680 | pglob->gl_flags = flags; |
1681 | } |
1682 | } |
1683 | |
1684 | if (stream != NULL) |
1685 | { |
1686 | save = errno; |
1687 | if (__glibc_unlikely (flags & GLOB_ALTDIRFUNC)) |
1688 | (*pglob->gl_closedir) (stream); |
1689 | else |
1690 | closedir (stream); |
1691 | __set_errno (save); |
1692 | } |
1693 | |
1694 | return result; |
1695 | } |
1696 | |