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Commit | Line | Data |
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76b87c03 UD |
1 | /* File tree walker functions. |
2 | Copyright (C) 1996, 1997 Free Software Foundation, Inc. | |
47707456 | 3 | This file is part of the GNU C Library. |
76b87c03 | 4 | Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996. |
28f540f4 | 5 | |
47707456 UD |
6 | The GNU C Library is free software; you can redistribute it and/or |
7 | modify it under the terms of the GNU Library General Public License as | |
8 | published by the Free Software Foundation; either version 2 of the | |
9 | License, or (at your option) any later version. | |
28f540f4 | 10 | |
47707456 UD |
11 | The GNU C Library is distributed in the hope that it will be useful, |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | Library General Public License for more details. | |
28f540f4 | 15 | |
47707456 UD |
16 | You should have received a copy of the GNU Library General Public |
17 | License along with the GNU C Library; see the file COPYING.LIB. If not, | |
18 | write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
19 | Boston, MA 02111-1307, USA. */ | |
28f540f4 | 20 | |
76b87c03 | 21 | #include <dirent.h> |
28f540f4 | 22 | #include <errno.h> |
76b87c03 UD |
23 | #include <ftw.h> |
24 | #include <search.h> | |
28f540f4 RM |
25 | #include <stdlib.h> |
26 | #include <string.h> | |
76b87c03 UD |
27 | #include <unistd.h> |
28 | #include <sys/param.h> | |
28f540f4 | 29 | #include <sys/stat.h> |
28f540f4 | 30 | |
76b87c03 UD |
31 | /* #define NDEBUG 1 */ |
32 | #include <assert.h> | |
28f540f4 | 33 | |
28f540f4 | 34 | |
76b87c03 UD |
35 | struct dir_data |
36 | { | |
37 | DIR *stream; | |
38 | char *content; | |
39 | }; | |
28f540f4 | 40 | |
d951286f UD |
41 | struct known_object |
42 | { | |
43 | dev_t dev; | |
44 | ino_t ino; | |
45 | }; | |
46 | ||
76b87c03 | 47 | struct ftw_data |
28f540f4 | 48 | { |
d951286f | 49 | /* Array with pointers to open directory streams. */ |
76b87c03 UD |
50 | struct dir_data **dirstreams; |
51 | size_t actdir; | |
52 | size_t maxdir; | |
28f540f4 | 53 | |
d951286f | 54 | /* Buffer containing name of currently processed object. */ |
76b87c03 UD |
55 | char *dirbuf; |
56 | size_t dirbufsize; | |
d951286f UD |
57 | |
58 | /* Passed as fourth argument to `nftw' callback. The `base' member | |
59 | tracks the content of the `dirbuf'. */ | |
76b87c03 | 60 | struct FTW ftw; |
28f540f4 | 61 | |
d951286f | 62 | /* Flags passed to `nftw' function. 0 for `ftw'. */ |
76b87c03 | 63 | int flags; |
28f540f4 | 64 | |
d951286f UD |
65 | /* Conversion array for flag values. It is the identity mapping for |
66 | `nftw' calls, otherwise it maps the values to those know by | |
67 | `ftw'. */ | |
76b87c03 | 68 | int *cvt_arr; |
28f540f4 | 69 | |
d951286f UD |
70 | /* Callback function. We always use the `nftw' form. */ |
71 | __nftw_func_t func; | |
28f540f4 | 72 | |
d951286f | 73 | /* Device of starting point. Needed for FTW_MOUNT. */ |
76b87c03 | 74 | dev_t dev; |
d951286f UD |
75 | |
76 | /* Data structure for keeping fingerprints of already processed | |
77 | object. This is needed when not using FTW_PHYS. */ | |
78 | void *known_objects; | |
76b87c03 | 79 | }; |
28f540f4 | 80 | |
92777700 | 81 | |
76b87c03 UD |
82 | /* Internally we use the FTW_* constants used for `nftw'. When the |
83 | process called `ftw' we must reduce the flag to the known flags | |
84 | for `ftw'. */ | |
85 | static int nftw_arr[] = | |
86 | { | |
87 | FTW_F, FTW_D, FTW_DNR, FTW_NS, FTW_SL, FTW_DP, FTW_SLN | |
88 | }; | |
28f540f4 | 89 | |
76b87c03 UD |
90 | static int ftw_arr[] = |
91 | { | |
92 | FTW_F, FTW_D, FTW_DNR, FTW_NS, FTW_F, FTW_D, FTW_NS | |
93 | }; | |
28f540f4 | 94 | |
76b87c03 UD |
95 | |
96 | /* Forward declarations of local functions. */ | |
d951286f UD |
97 | static int ftw_dir (struct ftw_data *data, struct stat *st); |
98 | ||
99 | ||
100 | static int | |
101 | object_compare (const void *p1, const void *p2) | |
102 | { | |
103 | /* We don't need a sophisticated and useful comparison. We are only | |
104 | interested in equality. */ | |
105 | return memcmp (p1, p2, sizeof (struct known_object)); | |
106 | } | |
107 | ||
108 | ||
109 | static inline int | |
110 | add_object (struct ftw_data *data, struct stat *st) | |
111 | { | |
112 | struct known_object *newp = malloc (sizeof (struct known_object)); | |
113 | if (newp == NULL) | |
114 | return -1; | |
115 | newp->dev = st->st_dev; | |
116 | newp->ino = st->st_ino; | |
117 | return __tsearch (newp, &data->known_objects, object_compare) ? 0 : -1; | |
118 | } | |
119 | ||
120 | ||
121 | static inline int | |
122 | find_object (struct ftw_data *data, struct stat *st) | |
123 | { | |
124 | struct known_object obj = { dev: st->st_dev, ino: st->st_ino }; | |
125 | return __tfind (&obj, &data->known_objects, object_compare) != NULL; | |
126 | } | |
76b87c03 UD |
127 | |
128 | ||
129 | static inline int | |
130 | open_dir_stream (struct ftw_data *data, struct dir_data *dirp) | |
131 | { | |
132 | int result = 0; | |
133 | ||
134 | if (data->dirstreams[data->actdir] != NULL) | |
135 | { | |
136 | /* Oh, oh. We must close this stream. Get all remaining | |
137 | entries and store them as a list in the `content' member of | |
138 | the `struct dir_data' variable. */ | |
139 | size_t bufsize = 1024; | |
140 | char *buf = malloc (bufsize); | |
141 | ||
142 | if (buf == NULL) | |
143 | result = -1; | |
144 | else | |
28f540f4 | 145 | { |
76b87c03 UD |
146 | DIR *st = data->dirstreams[data->actdir]->stream; |
147 | struct dirent *d; | |
148 | size_t actsize = 0; | |
149 | ||
150 | while ((d = readdir (st)) != NULL) | |
151 | { | |
152 | size_t this_len = _D_EXACT_NAMLEN (d); | |
153 | if (actsize + this_len + 2 >= bufsize) | |
154 | { | |
155 | char *newp; | |
156 | bufsize += MAX (1024, 2 * this_len); | |
157 | newp = realloc (buf, bufsize); | |
158 | if (newp == NULL) | |
159 | { | |
160 | /* No more memory. */ | |
161 | int save_err = errno; | |
162 | free (buf); | |
163 | __set_errno (save_err); | |
164 | result = -1; | |
165 | break; | |
166 | } | |
167 | buf = newp; | |
168 | } | |
169 | ||
170 | memcpy (buf + actsize, d->d_name, this_len); | |
171 | actsize += this_len; | |
172 | buf[actsize++] = '\0'; | |
173 | } | |
28f540f4 | 174 | |
76b87c03 UD |
175 | /* Terminate the list with an additional NUL byte. */ |
176 | buf[actsize++] = '\0'; | |
28f540f4 | 177 | |
76b87c03 UD |
178 | /* Shrink the buffer to what we actually need. */ |
179 | data->dirstreams[data->actdir]->content = realloc (buf, actsize); | |
180 | if (data->dirstreams[data->actdir]->content == NULL) | |
181 | { | |
182 | int save_err = errno; | |
183 | free (buf); | |
184 | __set_errno (save_err); | |
185 | result = -1; | |
186 | } | |
28f540f4 RM |
187 | else |
188 | { | |
76b87c03 UD |
189 | closedir (st); |
190 | data->dirstreams[data->actdir]->stream = NULL; | |
191 | data->dirstreams[data->actdir] = NULL; | |
28f540f4 RM |
192 | } |
193 | } | |
76b87c03 UD |
194 | } |
195 | ||
196 | /* Open the new stream. */ | |
197 | if (result == 0) | |
198 | { | |
199 | assert (data->dirstreams[data->actdir] == NULL); | |
200 | ||
201 | dirp->stream = opendir (data->dirbuf); | |
202 | if (dirp->stream == NULL) | |
203 | result = -1; | |
28f540f4 | 204 | else |
76b87c03 UD |
205 | { |
206 | dirp->content = NULL; | |
207 | data->dirstreams[data->actdir] = dirp; | |
208 | ||
209 | if (++data->actdir == data->maxdir) | |
210 | data->actdir = 0; | |
211 | } | |
212 | } | |
213 | ||
214 | return result; | |
215 | } | |
216 | ||
217 | ||
218 | static inline int | |
219 | process_entry (struct ftw_data *data, struct dir_data *dir, const char *name, | |
220 | size_t namlen) | |
221 | { | |
d951286f | 222 | struct stat st; |
76b87c03 UD |
223 | int result = 0; |
224 | int flag; | |
225 | ||
226 | if (name[0] == '.' && (name[1] == '\0' | |
227 | || (name[1] == '.' && name[2] == '\0'))) | |
228 | /* Don't process the "." and ".." entries. */ | |
229 | return 0; | |
230 | ||
231 | if (data->dirbufsize < data->ftw.base + namlen + 2) | |
232 | { | |
233 | /* Enlarge the buffer. */ | |
234 | char *newp; | |
235 | ||
236 | data->dirbufsize *= 2; | |
237 | newp = realloc (data->dirbuf, data->dirbufsize); | |
238 | if (newp == NULL) | |
239 | return -1; | |
240 | data->dirbuf = newp; | |
241 | } | |
28f540f4 | 242 | |
76b87c03 UD |
243 | memcpy (data->dirbuf + data->ftw.base, name, namlen); |
244 | data->dirbuf[data->ftw.base + namlen] = '\0'; | |
28f540f4 | 245 | |
b13927da UD |
246 | if (((data->flags & FTW_PHYS) |
247 | ? __lxstat (_STAT_VER, data->dirbuf, &st) | |
248 | : __xstat (_STAT_VER, data->dirbuf, &st)) < 0) | |
76b87c03 UD |
249 | { |
250 | if (errno != EACCES && errno != ENOENT) | |
251 | result = -1; | |
252 | else if (!(data->flags & FTW_PHYS) | |
b13927da | 253 | && __lxstat (_STAT_VER, data->dirbuf, &st) == 0 |
d951286f | 254 | && S_ISLNK (st.st_mode)) |
76b87c03 UD |
255 | flag = FTW_SLN; |
256 | else | |
257 | flag = FTW_NS; | |
258 | } | |
259 | else | |
260 | { | |
d951286f | 261 | if (S_ISDIR (st.st_mode)) |
76b87c03 | 262 | flag = FTW_D; |
d951286f | 263 | else if (S_ISLNK (st.st_mode)) |
76b87c03 UD |
264 | flag = FTW_SL; |
265 | else | |
266 | flag = FTW_F; | |
267 | } | |
268 | ||
269 | if (result == 0 | |
b13927da UD |
270 | && (flag == FTW_NS |
271 | || !(data->flags & FTW_MOUNT) || st.st_dev == data->dev)) | |
76b87c03 | 272 | { |
d951286f UD |
273 | if ((data->flags & FTW_PHYS) || flag == FTW_NS |
274 | || (!find_object (data, &st) | |
275 | /* Remember the object. */ | |
276 | && (result = add_object (data, &st)) == 0)) | |
28f540f4 | 277 | { |
d951286f | 278 | if (flag == FTW_D) |
76b87c03 | 279 | { |
d951286f | 280 | result = ftw_dir (data, &st); |
76b87c03 | 281 | |
d951286f | 282 | if (result == 0 && (data->flags & FTW_CHDIR)) |
76b87c03 | 283 | { |
d951286f UD |
284 | /* Change back to current directory. */ |
285 | int done = 0; | |
286 | if (dir->stream != NULL) | |
b13927da | 287 | if (__fchdir (dirfd (dir->stream)) == 0) |
d951286f | 288 | done = 1; |
76b87c03 | 289 | |
d951286f UD |
290 | if (!done) |
291 | { | |
292 | if (data->ftw.base == 1) | |
293 | { | |
294 | if (chdir ("/") < 0) | |
295 | result = -1; | |
296 | } | |
76b87c03 | 297 | else |
d951286f UD |
298 | { |
299 | /* Please note that we overwrite a slash. */ | |
300 | data->dirbuf[data->ftw.base - 1] = '\0'; | |
301 | ||
302 | if (chdir (data->dirbuf) < 0) | |
303 | result = -1; | |
304 | ||
305 | data->dirbuf[data->ftw.base - 1] = '/'; | |
306 | } | |
76b87c03 UD |
307 | } |
308 | } | |
28f540f4 | 309 | } |
d951286f UD |
310 | else |
311 | result = (*data->func) (data->dirbuf, &st, data->cvt_arr[flag], | |
312 | &data->ftw); | |
28f540f4 | 313 | } |
76b87c03 UD |
314 | } |
315 | ||
316 | return result; | |
317 | } | |
318 | ||
319 | ||
320 | static int | |
d951286f | 321 | ftw_dir (struct ftw_data *data, struct stat *st) |
76b87c03 UD |
322 | { |
323 | struct dir_data dir; | |
324 | struct dirent *d; | |
325 | int previous_base = data->ftw.base; | |
d951286f | 326 | int result; |
76b87c03 UD |
327 | char *startp; |
328 | ||
d951286f UD |
329 | /* Open the stream for this directory. This might require that |
330 | another stream has to be closed. */ | |
331 | result = open_dir_stream (data, &dir); | |
332 | if (result != 0) | |
333 | { | |
334 | if (errno == EACCES) | |
335 | /* We cannot read the directory. Signal this with a special flag. */ | |
336 | result = (*data->func) (data->dirbuf, st, FTW_DNR, &data->ftw); | |
337 | ||
338 | return result; | |
339 | } | |
340 | ||
76b87c03 UD |
341 | /* First, report the directory (if not depth-first). */ |
342 | if (!(data->flags & FTW_DEPTH)) | |
343 | { | |
d951286f | 344 | result = (*data->func) (data->dirbuf, st, FTW_D, &data->ftw); |
76b87c03 UD |
345 | if (result != 0) |
346 | return result; | |
347 | } | |
28f540f4 | 348 | |
76b87c03 UD |
349 | /* If necessary, change to this directory. */ |
350 | if (data->flags & FTW_CHDIR) | |
351 | { | |
b13927da | 352 | if (__fchdir (dirfd (dir.stream)) < 0) |
28f540f4 | 353 | { |
76b87c03 | 354 | if (errno == ENOSYS) |
28f540f4 | 355 | { |
76b87c03 UD |
356 | if (chdir (data->dirbuf) < 0) |
357 | result = -1; | |
28f540f4 | 358 | } |
76b87c03 UD |
359 | else |
360 | result = -1; | |
28f540f4 RM |
361 | } |
362 | ||
76b87c03 UD |
363 | if (result != 0) |
364 | { | |
365 | int save_err = errno; | |
366 | closedir (dir.stream); | |
367 | __set_errno (save_err); | |
368 | ||
369 | if (data->actdir-- == 0) | |
370 | data->actdir = data->maxdir - 1; | |
371 | data->dirstreams[data->actdir] = NULL; | |
372 | ||
373 | return result; | |
374 | } | |
28f540f4 RM |
375 | } |
376 | ||
76b87c03 UD |
377 | /* Next, update the `struct FTW' information. */ |
378 | ++data->ftw.level; | |
379 | startp = strchr (data->dirbuf, '\0'); | |
380 | *startp++ = '/'; | |
381 | data->ftw.base = startp - data->dirbuf; | |
28f540f4 | 382 | |
76b87c03 UD |
383 | while (dir.stream != NULL && (d = readdir (dir.stream)) != NULL) |
384 | { | |
385 | result = process_entry (data, &dir, d->d_name, _D_EXACT_NAMLEN (d)); | |
386 | if (result != 0) | |
387 | break; | |
388 | } | |
28f540f4 | 389 | |
76b87c03 | 390 | if (dir.stream != NULL) |
28f540f4 | 391 | { |
76b87c03 UD |
392 | /* The stream is still open. I.e., we did not need more |
393 | descriptors. Simply close the stream now. */ | |
394 | int save_err = errno; | |
395 | ||
396 | assert (dir.content == NULL); | |
397 | ||
398 | closedir (dir.stream); | |
399 | __set_errno (save_err); | |
400 | ||
401 | if (data->actdir-- == 0) | |
402 | data->actdir = data->maxdir - 1; | |
403 | data->dirstreams[data->actdir] = NULL; | |
28f540f4 | 404 | } |
76b87c03 | 405 | else |
28f540f4 | 406 | { |
76b87c03 UD |
407 | int save_err; |
408 | char *runp = dir.content; | |
409 | ||
410 | assert (result == 0); | |
411 | ||
412 | while (*runp != '\0') | |
28f540f4 | 413 | { |
76b87c03 UD |
414 | char *endp = strchr (runp, '\0'); |
415 | ||
416 | result = process_entry (data, &dir, runp, endp - runp); | |
417 | if (result != 0) | |
418 | break; | |
419 | ||
420 | runp = endp + 1; | |
28f540f4 | 421 | } |
76b87c03 UD |
422 | |
423 | save_err = errno; | |
424 | free (dir.content); | |
425 | __set_errno (save_err); | |
28f540f4 | 426 | } |
28f540f4 | 427 | |
76b87c03 | 428 | /* Prepare the return, revert the `struct FTW' information. */ |
d951286f | 429 | data->dirbuf[data->ftw.base - 1] = '\0'; |
76b87c03 UD |
430 | --data->ftw.level; |
431 | data->ftw.base = previous_base; | |
432 | ||
433 | /* Finally, if we process depth-first report the directory. */ | |
434 | if (result == 0 && (data->flags & FTW_DEPTH)) | |
d951286f | 435 | result = (*data->func) (data->dirbuf, st, FTW_DP, &data->ftw); |
28f540f4 | 436 | |
76b87c03 UD |
437 | return result; |
438 | } | |
439 | ||
440 | ||
441 | static int | |
442 | ftw_startup (const char *dir, int is_nftw, void *func, int descriptors, | |
443 | int flags) | |
444 | { | |
445 | struct ftw_data data; | |
d951286f | 446 | struct stat st; |
76b87c03 UD |
447 | int result = 0; |
448 | int save_err; | |
d951286f | 449 | char *cwd = NULL; |
76b87c03 UD |
450 | char *cp; |
451 | ||
452 | /* First make sure the parameters are reasonable. */ | |
453 | if (dir[0] == '\0') | |
454 | { | |
455 | __set_errno (ENOTDIR); | |
456 | return -1; | |
457 | } | |
28f540f4 | 458 | |
76b87c03 UD |
459 | data.maxdir = descriptors < 1 ? 1 : descriptors; |
460 | data.actdir = 0; | |
461 | data.dirstreams = (struct dir_data **) alloca (data.maxdir | |
462 | * sizeof (struct dir_data *)); | |
463 | memset (data.dirstreams, '\0', data.maxdir * sizeof (struct dir_data *)); | |
464 | ||
ae1025be | 465 | #ifdef PATH_MAX |
76b87c03 | 466 | data.dirbufsize = MAX (2 * strlen (dir), PATH_MAX); |
ae1025be UD |
467 | #else |
468 | data.dirbufsize = 2 * strlen (dir); | |
469 | #endif | |
76b87c03 UD |
470 | data.dirbuf = (char *) malloc (data.dirbufsize); |
471 | if (data.dirbuf == NULL) | |
472 | return -1; | |
d951286f | 473 | cp = __stpcpy (data.dirbuf, dir); |
76b87c03 UD |
474 | /* Strip trailing slashes. */ |
475 | while (cp > data.dirbuf + 1 && cp[-1] == '/') | |
476 | --cp; | |
477 | *cp = '\0'; | |
478 | ||
479 | data.ftw.level = 0; | |
480 | ||
481 | /* Find basename. */ | |
482 | while (cp > data.dirbuf && cp[-1] != '/') | |
483 | --cp; | |
484 | data.ftw.base = cp - data.dirbuf; | |
485 | ||
486 | data.flags = flags; | |
487 | ||
488 | /* This assignment might seem to be strange but it is what we want. | |
489 | The trick is that the first three arguments to the `ftw' and | |
490 | `nftw' callback functions are equal. Therefore we can call in | |
491 | every case the callback using the format of the `nftw' version | |
492 | and get the correct result since the stack layout for a function | |
493 | call in C allows this. */ | |
494 | data.func = (__nftw_func_t) func; | |
495 | ||
496 | /* Since we internally use the complete set of FTW_* values we need | |
497 | to reduce the value range before calling a `ftw' callback. */ | |
498 | data.cvt_arr = is_nftw ? nftw_arr : ftw_arr; | |
499 | ||
d951286f UD |
500 | /* No object known so far. */ |
501 | data.known_objects = NULL; | |
502 | ||
76b87c03 UD |
503 | /* Now go to the directory containing the initial file/directory. */ |
504 | if ((flags & FTW_CHDIR) && data.ftw.base > 0) | |
28f540f4 | 505 | { |
76b87c03 UD |
506 | /* GNU extension ahead. */ |
507 | cwd = getcwd (NULL, 0); | |
508 | if (cwd == NULL) | |
509 | result = -1; | |
510 | else | |
28f540f4 | 511 | { |
76b87c03 UD |
512 | /* Change to the directory the file is in. In data.dirbuf |
513 | we have a writable copy of the file name. Just NUL | |
514 | terminate it for now and change the directory. */ | |
515 | if (data.ftw.base == 1) | |
516 | /* I.e., the file is in the root directory. */ | |
517 | result = chdir ("/"); | |
518 | else | |
519 | { | |
520 | char ch = data.dirbuf[data.ftw.base - 1]; | |
521 | data.dirbuf[data.ftw.base - 1] = '\0'; | |
522 | result = chdir (data.dirbuf); | |
523 | data.dirbuf[data.ftw.base - 1] = ch; | |
524 | } | |
28f540f4 RM |
525 | } |
526 | } | |
527 | ||
76b87c03 UD |
528 | /* Get stat info for start directory. */ |
529 | if (result == 0) | |
b13927da UD |
530 | if (((flags & FTW_PHYS) |
531 | ? __lxstat (_STAT_VER, data.dirbuf, &st) | |
532 | : __xstat (_STAT_VER, data.dirbuf, &st)) < 0) | |
76b87c03 UD |
533 | { |
534 | if (errno == EACCES) | |
d951286f | 535 | result = (*data.func) (data.dirbuf, &st, FTW_NS, &data.ftw); |
76b87c03 UD |
536 | else if (!(flags & FTW_PHYS) |
537 | && errno == ENOENT | |
b13927da UD |
538 | && __lxstat (_STAT_VER, dir, &st) == 0 |
539 | && S_ISLNK (st.st_mode)) | |
d951286f | 540 | result = (*data.func) (data.dirbuf, &st, data.cvt_arr[FTW_SLN], |
76b87c03 UD |
541 | &data.ftw); |
542 | else | |
543 | /* No need to call the callback since we cannot say anything | |
544 | about the object. */ | |
545 | result = -1; | |
546 | } | |
547 | else | |
548 | { | |
d951286f | 549 | if (S_ISDIR (st.st_mode)) |
76b87c03 | 550 | { |
d951286f UD |
551 | /* Remember the device of the initial directory in case |
552 | FTW_MOUNT is given. */ | |
553 | data.dev = st.st_dev; | |
554 | ||
555 | /* We know this directory now. */ | |
556 | if (!(flags & FTW_PHYS)) | |
557 | result = add_object (&data, &st); | |
558 | ||
559 | if (result == 0) | |
560 | result = ftw_dir (&data, &st); | |
76b87c03 UD |
561 | } |
562 | else | |
563 | { | |
d951286f | 564 | int flag = S_ISLNK (st.st_mode) ? FTW_SL : FTW_F; |
76b87c03 | 565 | |
d951286f | 566 | result = (*data.func) (data.dirbuf, &st, data.cvt_arr[flag], |
76b87c03 UD |
567 | &data.ftw); |
568 | } | |
569 | } | |
570 | ||
571 | /* Return to the start directory (if necessary). */ | |
572 | if (cwd != NULL) | |
573 | { | |
574 | int save_err = errno; | |
575 | chdir (cwd); | |
576 | free (cwd); | |
577 | __set_errno (save_err); | |
578 | } | |
579 | ||
580 | /* Free all memory. */ | |
581 | save_err = errno; | |
d951286f | 582 | __tdestroy (data.known_objects, free); |
76b87c03 UD |
583 | free (data.dirbuf); |
584 | __set_errno (save_err); | |
585 | ||
586 | return result; | |
587 | } | |
588 | ||
589 | ||
590 | ||
591 | /* Entry points. */ | |
592 | ||
593 | int | |
594 | ftw (path, func, descriptors) | |
595 | const char *path; | |
596 | __ftw_func_t func; | |
597 | int descriptors; | |
598 | { | |
599 | return ftw_startup (path, 0, func, descriptors, 0); | |
600 | } | |
601 | ||
602 | int | |
603 | nftw (path, func, descriptors, flags) | |
604 | const char *path; | |
605 | __nftw_func_t func; | |
606 | int descriptors; | |
607 | int flags; | |
608 | { | |
609 | return ftw_startup (path, 1, func, descriptors, flags); | |
28f540f4 | 610 | } |