1 /* File tree walker functions.
2 Copyright (C) 1996-2003, 2004 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
5
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
10
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 Lesser General Public License for more details.
15
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, see
18 <http://www.gnu.org/licenses/>. */
19
20 #ifdef HAVE_CONFIG_H
21 # include <config.h>
22 #endif
23
24 #include <features.h>
25 /* need errno.h before undefining _LIBC */
26 #include <errno.h>
27 #ifdef __UCLIBC__
28 #undef _LIBC
29 #define HAVE_DIRENT_H 1
30 #define HAVE_SYS_PARAM_H 1
31 #define HAVE_DECL_STPCPY 1
32 #define HAVE_MEMPCPY 1
33 #endif
34
35 #if __GNUC__
36 # undef alloca
37 # define alloca __builtin_alloca
38 #else
39 # if HAVE_ALLOCA_H
40 # include <alloca.h>
41 # else
42 # ifdef _AIX
43 # pragma alloca
44 # else
45 char *alloca ();
46 # endif
47 # endif
48 #endif
49
50 #if defined _LIBC
51 # include <dirent.h>
52 # define NAMLEN(dirent) _D_EXACT_NAMLEN (dirent)
53 #else
54 # if HAVE_DIRENT_H
55 # include <dirent.h>
56 # define NAMLEN(dirent) strlen ((dirent)->d_name)
57 # else
58 # define dirent direct
59 # define NAMLEN(dirent) (dirent)->d_namlen
60 # if HAVE_SYS_NDIR_H
61 # include <sys/ndir.h>
62 # endif
63 # if HAVE_SYS_DIR_H
64 # include <sys/dir.h>
65 # endif
66 # if HAVE_NDIR_H
67 # include <ndir.h>
68 # endif
69 # endif
70 #endif
71
72 #include <ftw.h>
73 #include <limits.h>
74 #include <search.h>
75 #include <stdlib.h>
76 #include <string.h>
77 #include <unistd.h>
78 #if HAVE_SYS_PARAM_H || defined _LIBC
79 # include <sys/param.h>
80 #endif
81 #include <sys/stat.h>
82
83 #if !defined _LIBC && !HAVE_DECL_STPCPY && !defined stpcpy
84 char *stpcpy ();
85 #endif
86
87 #if !defined _LIBC && ! defined HAVE_MEMPCPY && ! defined mempcpy
88 /* Be CAREFUL that there are no side effects in N. */
89 # define mempcpy(D, S, N) ((void *) ((char *) memcpy (D, S, N) + (N)))
90 #endif
91
92 /* #define NDEBUG 1 */
93 #include <assert.h>
94
95 #if !defined _LIBC
96 # undef __chdir
97 # define __chdir chdir
98 # undef __closedir
99 # define __closedir closedir
100 # undef __fchdir
101 # define __fchdir fchdir
102 # undef __getcwd
103 # ifndef __UCLIBC__
104 # define __getcwd(P, N) xgetcwd ()
105 extern char *xgetcwd (void);
106 # else
107 # define __getcwd getcwd
108 # endif
109 # undef __mempcpy
110 # define __mempcpy mempcpy
111 # undef __opendir
112 # define __opendir opendir
113 # undef __readdir64
114 # ifndef __UCLIBC_HAS_LFS__
115 # define __readdir64 readdir
116 # else
117 # define __readdir64 readdir64
118 # endif
119 # undef __stpcpy
120 # define __stpcpy stpcpy
121 # undef __tdestroy
122 # define __tdestroy tdestroy
123 # undef __tfind
124 # define __tfind tfind
125 # undef __tsearch
126 # define __tsearch tsearch
127 # undef internal_function
128 # define internal_function /* empty */
129 # ifndef __UCLIBC_HAS_LFS__
130 # undef dirent64
131 # define dirent64 dirent
132 # endif
133 # undef MAX
134 # define MAX(a, b) ((a) > (b) ? (a) : (b))
135 #endif
136
137 /* Arrange to make lstat calls go through the wrapper function
138 on systems with an lstat function that does not dereference symlinks
139 that are specified with a trailing slash. */
140 #if !defined _LIBC && !defined LSTAT_FOLLOWS_SLASHED_SYMLINK && !defined __UCLIBC__
141 int rpl_lstat (const char *, struct stat *);
142 # undef lstat
143 # define lstat(Name, Stat_buf) rpl_lstat(Name, Stat_buf)
144 #endif
145
146 #ifndef __set_errno
147 # define __set_errno(Val) errno = (Val)
148 #endif
149
150 /* Support for the LFS API version. */
151 #ifndef FTW_NAME
152 # define FTW_NAME ftw
153 # define NFTW_NAME nftw
154 # define NFTW_OLD_NAME __old_nftw
155 # define NFTW_NEW_NAME __new_nftw
156 # define INO_T ino_t
157 # define STAT stat
158 # ifdef _LIBC
159 # define LXSTAT __lxstat
160 # define XSTAT __xstat
161 # else
162 # define LXSTAT(V,f,sb) lstat (f,sb)
163 # define XSTAT(V,f,sb) stat (f,sb)
164 # endif
165 # define FTW_FUNC_T __ftw_func_t
166 # define NFTW_FUNC_T __nftw_func_t
167 #endif
168
169 /* We define PATH_MAX if the system does not provide a definition.
170 This does not artificially limit any operation. PATH_MAX is simply
171 used as a guesstimate for the expected maximal path length.
172 Buffers will be enlarged if necessary. */
173 #ifndef PATH_MAX
174 # define PATH_MAX 1024
175 #endif
176
177 struct dir_data
178 {
179 DIR *stream;
180 char *content;
181 };
182
183 struct known_object
184 {
185 dev_t dev;
186 INO_T ino;
187 };
188
189 struct ftw_data
190 {
191 /* Array with pointers to open directory streams. */
192 struct dir_data **dirstreams;
193 size_t actdir;
194 size_t maxdir;
195
196 /* Buffer containing name of currently processed object. */
197 char *dirbuf;
198 size_t dirbufsize;
199
200 /* Passed as fourth argument to `nftw' callback. The `base' member
201 tracks the content of the `dirbuf'. */
202 struct FTW ftw;
203
204 /* Flags passed to `nftw' function. 0 for `ftw'. */
205 int flags;
206
207 /* Conversion array for flag values. It is the identity mapping for
208 `nftw' calls, otherwise it maps the values to those known by
209 `ftw'. */
210 const int *cvt_arr;
211
212 /* Callback function. We always use the `nftw' form. */
213 NFTW_FUNC_T func;
214
215 /* Device of starting point. Needed for FTW_MOUNT. */
216 dev_t dev;
217
218 /* Data structure for keeping fingerprints of already processed
219 object. This is needed when not using FTW_PHYS. */
220 void *known_objects;
221 };
222
223
224 /* Internally we use the FTW_* constants used for `nftw'. When invoked
225 as `ftw', map each flag to the subset of values used by `ftw'. */
226 static const int nftw_arr[] =
227 {
228 FTW_F, FTW_D, FTW_DNR, FTW_NS, FTW_SL, FTW_DP, FTW_SLN
229 };
230
231 static const int ftw_arr[] =
232 {
233 FTW_F, FTW_D, FTW_DNR, FTW_NS, FTW_F, FTW_D, FTW_NS
234 };
235
236
237 /* Forward declarations of local functions. */
238 static int ftw_dir (struct ftw_data *data, struct STAT *st,
239 struct dir_data *old_dir) internal_function;
240
241
242 static int
object_compare(const void * p1,const void * p2)243 object_compare (const void *p1, const void *p2)
244 {
245 /* We don't need a sophisticated and useful comparison. We are only
246 interested in equality. However, we must be careful not to
247 accidentally compare `holes' in the structure. */
248 const struct known_object *kp1 = p1, *kp2 = p2;
249 int cmp1;
250 cmp1 = (kp1->ino > kp2->ino) - (kp1->ino < kp2->ino);
251 if (cmp1 != 0)
252 return cmp1;
253 return (kp1->dev > kp2->dev) - (kp1->dev < kp2->dev);
254 }
255
256
257 static __inline__ int
add_object(struct ftw_data * data,struct STAT * st)258 add_object (struct ftw_data *data, struct STAT *st)
259 {
260 struct known_object *newp = malloc (sizeof (struct known_object));
261 if (newp == NULL)
262 return -1;
263 newp->dev = st->st_dev;
264 newp->ino = st->st_ino;
265 return __tsearch (newp, &data->known_objects, object_compare) ? 0 : -1;
266 }
267
268
269 static __inline__ int
find_object(struct ftw_data * data,struct STAT * st)270 find_object (struct ftw_data *data, struct STAT *st)
271 {
272 struct known_object obj;
273 obj.dev = st->st_dev;
274 obj.ino = st->st_ino;
275 return __tfind (&obj, &data->known_objects, object_compare) != NULL;
276 }
277
278
279 static __inline__ int
280 __attribute ((always_inline))
open_dir_stream(struct ftw_data * data,struct dir_data * dirp)281 open_dir_stream (struct ftw_data *data, struct dir_data *dirp)
282 {
283 int result = 0;
284
285 if (data->dirstreams[data->actdir] != NULL)
286 {
287 /* Oh, oh. We must close this stream. Get all remaining
288 entries and store them as a list in the `content' member of
289 the `struct dir_data' variable. */
290 size_t bufsize = 1024;
291 char *buf = malloc (bufsize);
292
293 if (buf == NULL)
294 result = -1;
295 else
296 {
297 DIR *st = data->dirstreams[data->actdir]->stream;
298 struct dirent64 *d;
299 size_t actsize = 0;
300
301 while ((d = __readdir64 (st)) != NULL)
302 {
303 size_t this_len = NAMLEN (d);
304 if (actsize + this_len + 2 >= bufsize)
305 {
306 char *newp;
307 bufsize += MAX (1024, 2 * this_len);
308 newp = (char *) realloc (buf, bufsize);
309 if (newp == NULL)
310 {
311 /* No more memory. */
312 int save_err = errno;
313 free (buf);
314 __set_errno (save_err);
315 result = -1;
316 break;
317 }
318 buf = newp;
319 }
320
321 *((char *) __mempcpy (buf + actsize, d->d_name, this_len))
322 = '\0';
323 actsize += this_len + 1;
324 }
325
326 /* Terminate the list with an additional NUL byte. */
327 buf[actsize++] = '\0';
328
329 /* Shrink the buffer to what we actually need. */
330 data->dirstreams[data->actdir]->content = realloc (buf, actsize);
331 if (data->dirstreams[data->actdir]->content == NULL)
332 {
333 int save_err = errno;
334 free (buf);
335 __set_errno (save_err);
336 result = -1;
337 }
338 else
339 {
340 __closedir (st);
341 data->dirstreams[data->actdir]->stream = NULL;
342 data->dirstreams[data->actdir] = NULL;
343 }
344 }
345 }
346
347 /* Open the new stream. */
348 if (result == 0)
349 {
350 const char *name = ((data->flags & FTW_CHDIR)
351 ? data->dirbuf + data->ftw.base: data->dirbuf);
352 assert (data->dirstreams[data->actdir] == NULL);
353
354 dirp->stream = __opendir (name);
355 if (dirp->stream == NULL)
356 result = -1;
357 else
358 {
359 dirp->content = NULL;
360 data->dirstreams[data->actdir] = dirp;
361
362 if (++data->actdir == data->maxdir)
363 data->actdir = 0;
364 }
365 }
366
367 return result;
368 }
369
370
371 static int
372 internal_function
process_entry(struct ftw_data * data,struct dir_data * dir,const char * name,size_t namlen)373 process_entry (struct ftw_data *data, struct dir_data *dir, const char *name,
374 size_t namlen)
375 {
376 struct STAT st;
377 int result = 0;
378 int flag = 0;
379 size_t new_buflen;
380
381 if (name[0] == '.' && (name[1] == '\0'
382 || (name[1] == '.' && name[2] == '\0')))
383 /* Don't process the "." and ".." entries. */
384 return 0;
385
386 new_buflen = data->ftw.base + namlen + 2;
387 if (data->dirbufsize < new_buflen)
388 {
389 /* Enlarge the buffer. */
390 char *newp;
391
392 data->dirbufsize = 2 * new_buflen;
393 newp = (char *) realloc (data->dirbuf, data->dirbufsize);
394 if (newp == NULL)
395 return -1;
396 data->dirbuf = newp;
397 }
398
399 *((char *) __mempcpy (data->dirbuf + data->ftw.base, name, namlen)) = '\0';
400
401 if ((data->flags & FTW_CHDIR) == 0)
402 name = data->dirbuf;
403
404 if (((data->flags & FTW_PHYS)
405 ? LXSTAT (_STAT_VER, name, &st)
406 : XSTAT (_STAT_VER, name, &st)) < 0)
407 {
408 if (errno != EACCES && errno != ENOENT)
409 result = -1;
410 else if (!(data->flags & FTW_PHYS)
411 && LXSTAT (_STAT_VER, name, &st) == 0
412 && S_ISLNK (st.st_mode))
413 flag = FTW_SLN;
414 else
415 flag = FTW_NS;
416 }
417 else
418 {
419 if (S_ISDIR (st.st_mode))
420 flag = FTW_D;
421 else if (S_ISLNK (st.st_mode))
422 flag = FTW_SL;
423 else
424 flag = FTW_F;
425 }
426
427 if (result == 0
428 && (flag == FTW_NS
429 || !(data->flags & FTW_MOUNT) || st.st_dev == data->dev))
430 {
431 if (flag == FTW_D)
432 {
433 if ((data->flags & FTW_PHYS)
434 || (!find_object (data, &st)
435 /* Remember the object. */
436 && (result = add_object (data, &st)) == 0))
437 result = ftw_dir (data, &st, dir);
438 }
439 else
440 result = (*data->func) (data->dirbuf, &st, data->cvt_arr[flag],
441 &data->ftw);
442 }
443
444 if ((data->flags & FTW_ACTIONRETVAL) && result == FTW_SKIP_SUBTREE)
445 result = 0;
446
447 return result;
448 }
449
450
451 static int
452 __attribute ((noinline))
453 internal_function
ftw_dir(struct ftw_data * data,struct STAT * st,struct dir_data * old_dir)454 ftw_dir (struct ftw_data *data, struct STAT *st, struct dir_data *old_dir)
455 {
456 struct dir_data dir;
457 struct dirent64 *d;
458 int previous_base = data->ftw.base;
459 int result;
460 char *startp;
461
462 /* Open the stream for this directory. This might require that
463 another stream has to be closed. */
464 result = open_dir_stream (data, &dir);
465 if (result != 0)
466 {
467 if (errno == EACCES)
468 /* We cannot read the directory. Signal this with a special flag. */
469 result = (*data->func) (data->dirbuf, st, FTW_DNR, &data->ftw);
470
471 return result;
472 }
473
474 /* First, report the directory (if not depth-first). */
475 if (!(data->flags & FTW_DEPTH))
476 {
477 result = (*data->func) (data->dirbuf, st, FTW_D, &data->ftw);
478 if (result != 0)
479 {
480 int save_err;
481 fail:
482 save_err = errno;
483 __closedir (dir.stream);
484 __set_errno (save_err);
485
486 if (data->actdir-- == 0)
487 data->actdir = data->maxdir - 1;
488 data->dirstreams[data->actdir] = NULL;
489 return result;
490 }
491 }
492
493 /* If necessary, change to this directory. */
494 if (data->flags & FTW_CHDIR)
495 {
496 if (__fchdir (dirfd (dir.stream)) < 0)
497 {
498 result = -1;
499 goto fail;
500 }
501 }
502
503 /* Next, update the `struct FTW' information. */
504 ++data->ftw.level;
505 startp = strchr (data->dirbuf, '\0');
506 /* There always must be a directory name. */
507 assert (startp != data->dirbuf);
508 if (startp[-1] != '/')
509 *startp++ = '/';
510 data->ftw.base = startp - data->dirbuf;
511
512 while (dir.stream != NULL && (d = __readdir64 (dir.stream)) != NULL)
513 {
514 result = process_entry (data, &dir, d->d_name, NAMLEN (d));
515 if (result != 0)
516 break;
517 }
518
519 if (dir.stream != NULL)
520 {
521 /* The stream is still open. I.e., we did not need more
522 descriptors. Simply close the stream now. */
523 int save_err = errno;
524
525 assert (dir.content == NULL);
526
527 __closedir (dir.stream);
528 __set_errno (save_err);
529
530 if (data->actdir-- == 0)
531 data->actdir = data->maxdir - 1;
532 data->dirstreams[data->actdir] = NULL;
533 }
534 else
535 {
536 int save_err;
537 char *runp = dir.content;
538
539 while (result == 0 && *runp != '\0')
540 {
541 char *endp = strchr (runp, '\0');
542
543 result = process_entry (data, &dir, runp, endp - runp);
544
545 runp = endp + 1;
546 }
547
548 save_err = errno;
549 free (dir.content);
550 __set_errno (save_err);
551 }
552
553 if ((data->flags & FTW_ACTIONRETVAL) && result == FTW_SKIP_SIBLINGS)
554 result = 0;
555
556 /* Prepare the return, revert the `struct FTW' information. */
557 data->dirbuf[data->ftw.base - 1] = '\0';
558 --data->ftw.level;
559 data->ftw.base = previous_base;
560
561 /* Finally, if we process depth-first report the directory. */
562 if (result == 0 && (data->flags & FTW_DEPTH))
563 result = (*data->func) (data->dirbuf, st, FTW_DP, &data->ftw);
564
565 if (old_dir
566 && (data->flags & FTW_CHDIR)
567 && (result == 0
568 || ((data->flags & FTW_ACTIONRETVAL)
569 && (result != -1 && result != FTW_STOP))))
570 {
571 /* Change back to the parent directory. */
572 int done = 0;
573 if (old_dir->stream != NULL)
574 if (__fchdir (dirfd (old_dir->stream)) == 0)
575 done = 1;
576
577 if (!done)
578 {
579 if (data->ftw.base == 1)
580 {
581 if (__chdir ("/") < 0)
582 result = -1;
583 }
584 else
585 if (__chdir ("..") < 0)
586 result = -1;
587 }
588 }
589
590 return result;
591 }
592
593
594 static int
595 __attribute ((noinline))
596 internal_function
ftw_startup(const char * dir,int is_nftw,void * func,int descriptors,int flags)597 ftw_startup (const char *dir, int is_nftw, void *func, int descriptors,
598 int flags)
599 {
600 struct ftw_data data;
601 struct STAT st;
602 int result = 0;
603 int save_err;
604 char *cwd = NULL;
605 char *cp;
606
607 /* First make sure the parameters are reasonable. */
608 if (dir[0] == '\0')
609 {
610 __set_errno (ENOENT);
611 return -1;
612 }
613
614 data.maxdir = descriptors < 1 ? 1 : descriptors;
615 data.actdir = 0;
616 data.dirstreams = (struct dir_data **) alloca (data.maxdir
617 * sizeof (struct dir_data *));
618 memset (data.dirstreams, '\0', data.maxdir * sizeof (struct dir_data *));
619
620 /* PATH_MAX is always defined when we get here. */
621 data.dirbufsize = MAX (2 * strlen (dir), PATH_MAX);
622 data.dirbuf = (char *) malloc (data.dirbufsize);
623 if (data.dirbuf == NULL)
624 return -1;
625 cp = __stpcpy (data.dirbuf, dir);
626 /* Strip trailing slashes. */
627 while (cp > data.dirbuf + 1 && cp[-1] == '/')
628 --cp;
629 *cp = '\0';
630
631 data.ftw.level = 0;
632
633 /* Find basename. */
634 while (cp > data.dirbuf && cp[-1] != '/')
635 --cp;
636 data.ftw.base = cp - data.dirbuf;
637
638 data.flags = flags;
639
640 /* This assignment might seem to be strange but it is what we want.
641 The trick is that the first three arguments to the `ftw' and
642 `nftw' callback functions are equal. Therefore we can call in
643 every case the callback using the format of the `nftw' version
644 and get the correct result since the stack layout for a function
645 call in C allows this. */
646 data.func = (NFTW_FUNC_T) func;
647
648 /* Since we internally use the complete set of FTW_* values we need
649 to reduce the value range before calling a `ftw' callback. */
650 data.cvt_arr = is_nftw ? nftw_arr : ftw_arr;
651
652 /* No object known so far. */
653 data.known_objects = NULL;
654
655 /* Now go to the directory containing the initial file/directory. */
656 if (flags & FTW_CHDIR)
657 {
658 /* GNU extension ahead. */
659 cwd = __getcwd (NULL, 0);
660 if (cwd == NULL)
661 result = -1;
662 else if (data.ftw.base > 0)
663 {
664 /* Change to the directory the file is in. In data.dirbuf
665 we have a writable copy of the file name. Just NUL
666 terminate it for now and change the directory. */
667 if (data.ftw.base == 1)
668 /* I.e., the file is in the root directory. */
669 result = __chdir ("/");
670 else
671 {
672 char ch = data.dirbuf[data.ftw.base - 1];
673 data.dirbuf[data.ftw.base - 1] = '\0';
674 result = __chdir (data.dirbuf);
675 data.dirbuf[data.ftw.base - 1] = ch;
676 }
677 }
678 }
679
680 /* Get stat info for start directory. */
681 if (result == 0)
682 {
683 const char *name = ((data.flags & FTW_CHDIR)
684 ? data.dirbuf + data.ftw.base
685 : data.dirbuf);
686
687 if (((flags & FTW_PHYS)
688 ? LXSTAT (_STAT_VER, name, &st)
689 : XSTAT (_STAT_VER, name, &st)) < 0)
690 {
691 if (!(flags & FTW_PHYS)
692 && errno == ENOENT
693 && LXSTAT (_STAT_VER, name, &st) == 0
694 && S_ISLNK (st.st_mode))
695 result = (*data.func) (data.dirbuf, &st, data.cvt_arr[FTW_SLN],
696 &data.ftw);
697 else
698 /* No need to call the callback since we cannot say anything
699 about the object. */
700 result = -1;
701 }
702 else
703 {
704 if (S_ISDIR (st.st_mode))
705 {
706 /* Remember the device of the initial directory in case
707 FTW_MOUNT is given. */
708 data.dev = st.st_dev;
709
710 /* We know this directory now. */
711 if (!(flags & FTW_PHYS))
712 result = add_object (&data, &st);
713
714 if (result == 0)
715 result = ftw_dir (&data, &st, NULL);
716 }
717 else
718 {
719 int flag = S_ISLNK (st.st_mode) ? FTW_SL : FTW_F;
720
721 result = (*data.func) (data.dirbuf, &st, data.cvt_arr[flag],
722 &data.ftw);
723 }
724 }
725
726 if ((flags & FTW_ACTIONRETVAL)
727 && (result == FTW_SKIP_SUBTREE || result == FTW_SKIP_SIBLINGS))
728 result = 0;
729 }
730
731 /* Return to the start directory (if necessary). */
732 if (cwd != NULL)
733 {
734 save_err = errno;
735 __chdir (cwd);
736 free (cwd);
737 __set_errno (save_err);
738 }
739
740 /* Free all memory. */
741 save_err = errno;
742 __tdestroy (data.known_objects, free);
743 free (data.dirbuf);
744 __set_errno (save_err);
745
746 return result;
747 }
748
749
750
751 /* Entry points. */
752 #ifdef __UCLIBC_HAS_FTW__
753 int
FTW_NAME(const char * path,FTW_FUNC_T func,int descriptors)754 FTW_NAME (const char *path, FTW_FUNC_T func, int descriptors)
755 {
756 return ftw_startup (path, 0, func, descriptors, 0);
757 }
758 #endif
759
760 #ifdef __UCLIBC_HAS_NFTW__
761 #ifndef _LIBC
762 int
NFTW_NAME(const char * path,NFTW_FUNC_T func,int descriptors,int flags)763 NFTW_NAME (const char *path, NFTW_FUNC_T func, int descriptors, int flags)
764 {
765 return ftw_startup (path, 1, func, descriptors, flags);
766 }
767 #else
768
769 #include <shlib-compat.h>
770
771 int NFTW_NEW_NAME (const char *, NFTW_FUNC_T, int, int);
772
773 int
NFTW_NEW_NAME(const char * path,NFTW_FUNC_T func,int descriptors,int flags)774 NFTW_NEW_NAME (const char *path, NFTW_FUNC_T func, int descriptors, int flags)
775 {
776 if (flags
777 & ~(FTW_PHYS | FTW_MOUNT | FTW_CHDIR | FTW_DEPTH | FTW_ACTIONRETVAL))
778 {
779 __set_errno (EINVAL);
780 return -1;
781 }
782 return ftw_startup (path, 1, func, descriptors, flags);
783 }
784
785 versioned_symbol (libc, NFTW_NEW_NAME, NFTW_NAME, GLIBC_2_3_3);
786
787 #if SHLIB_COMPAT(libc, GLIBC_2_1, GLIBC_2_3_3)
788
789 /* Older nftw* version just ignored all unknown flags. */
790
791 int NFTW_OLD_NAME (const char *, NFTW_FUNC_T, int, int);
792
793 int
794 attribute_compat_text_section
NFTW_OLD_NAME(const char * path,NFTW_FUNC_T func,int descriptors,int flags)795 NFTW_OLD_NAME (const char *path, NFTW_FUNC_T func, int descriptors, int flags)
796 {
797 flags &= (FTW_PHYS | FTW_MOUNT | FTW_CHDIR | FTW_DEPTH);
798 return ftw_startup (path, 1, func, descriptors, flags);
799 }
800
801 compat_symbol (libc, NFTW_OLD_NAME, NFTW_NAME, GLIBC_2_1);
802 #endif
803 #endif
804 #endif
805