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/* Copyright (C) 1992, 1993, 1994, 1995, 1996 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>
#include <string.h>
#include <errno.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))
{
size_t dsize;
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;
}
dsize = &d->d_name[d->d_namlen + 1] - (char *) d;
v[i] = (struct dirent *) malloc (dsize);
if (v[i] == NULL)
goto lose;
memcpy (v[i++], d, dsize);
}
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;
}
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