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/* Copyright (C) 1992, 93, 94, 95, 96, 97 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., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <sys/types.h>
#if HAVE_DIRENT_H
# include <dirent.h>
# define NAMLEN(dirent) strlen((dirent)->d_name)
#else
# define dirent direct
# define NAMLEN(dirent) (dirent)->d_namlen
# if HAVE_SYS_NDIR_H
# include <sys/ndir.h>
# endif
# if HAVE_SYS_DIR_H
# include <sys/dir.h>
# endif
# if HAVE_NDIR_H
# include <ndir.h>
# endif
#endif
#undef PARAMS
#if defined (__GNUC__) || __STDC__
# define PARAMS(args) args
#else
# define PARAMS(args) ()
#endif
#define set_errno(e) (errno = (e))
int
scandir (dir, namelist, select, cmp)
const char *dir;
struct dirent ***namelist;
int (*select) PARAMS ((struct dirent *));
int (*cmp) PARAMS ((const void *, const void *));
{
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;
set_errno (0);
i = 0;
while ((d = readdir (dp)) != NULL)
if (select == NULL || (*select) (d))
{
size_t dsize;
/* Ignore errors from select or readdir */
set_errno (0);
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:
set_errno (ENOMEM);
break;
}
v = new;
}
dsize = &d->d_name[1 + NAMLEN (d)] - (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);
set_errno (save);
return -1;
}
(void) closedir (dp);
set_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;
}
int
alphasort (const void *a, const void *b)
{
return strcmp ((*(const struct dirent **) a)->d_name,
(*(const struct dirent **) b)->d_name);
}
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