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- /* Copyright (C) 1992, 1993, 1994 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
-
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Library General Public License as
- published by the Free Software Foundation; either version 2 of the
- License, or (at your option) any later version.
-
- The GNU C Library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Library General Public License for more details.
-
- You should have received a copy of the GNU Library General Public
- License along with the GNU C Library; see the file COPYING.LIB. If
- not, write to the Free Software Foundation, Inc., 675 Mass Ave,
- Cambridge, MA 02139, USA. */
-
- #include <ansidecl.h>
- #include <dirent.h>
- #include <stdlib.h>
-
- int
- DEFUN(scandir, (dir, namelist, select, cmp),
- CONST char *dir AND
- struct dirent ***namelist AND
- int EXFUN((*select), (struct dirent *)) AND
- int EXFUN((*cmp), (CONST PTR, CONST PTR)))
- {
- DIR *dp = opendir (dir);
- struct dirent **v = NULL;
- size_t vsize = 0, i;
- struct dirent *d;
- int save;
-
- if (dp == NULL)
- return -1;
-
- save = errno;
- errno = 0;
-
- i = 0;
- while ((d = readdir (dp)) != NULL)
- if (select == NULL || (*select) (d))
- {
- if (i == vsize)
- {
- struct dirent **new;
- if (vsize == 0)
- vsize = 10;
- else
- vsize *= 2;
- new = (struct dirent **) realloc (v, vsize * sizeof (*v));
- if (new == NULL)
- {
- lose:
- errno = ENOMEM;
- break;
- }
- v = new;
- }
-
- v[i] = (struct dirent *) malloc (sizeof (**v));
- if (v[i] == NULL)
- goto lose;
-
- *v[i++] = *d;
- }
-
- if (errno != 0)
- {
- save = errno;
- (void) closedir (dp);
- while (i > 0)
- free (v[--i]);
- free (v);
- errno = save;
- return -1;
- }
-
- (void) closedir (dp);
- errno = save;
-
- /* Sort the list if we have a comparison function to sort with. */
- if (cmp != NULL)
- qsort (v, i, sizeof (*v), cmp);
- *namelist = v;
- return i;
- }
-