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/*
* Copyright (C) 2000-2006 Erik Andersen <andersen@uclibc.org>
*
* Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
*/
#include <dirent.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <errno.h>
#include <sys/types.h>
#include "dirstream.h"
int scandir(const char *dir, struct dirent ***namelist,
int (*selector) (const struct dirent *),
int (*compar) (const struct dirent **, const struct dirent **))
{
DIR *dp = opendir (dir);
struct dirent *current;
struct dirent **names = NULL;
size_t names_size = 0, pos;
int save;
if (dp == NULL)
return -1;
save = errno;
__set_errno (0);
pos = 0;
while ((current = readdir (dp)) != NULL) {
int use_it = selector == NULL;
if (! use_it)
{
use_it = (*selector) (current);
/* The selector function might have changed errno.
* It was zero before and it need to be again to make
* the latter tests work. */
if (! use_it)
__set_errno (0);
}
if (use_it)
{
struct dirent *vnew;
size_t dsize;
/* Ignore errors from selector or readdir */
__set_errno (0);
if (unlikely(pos == names_size))
{
struct dirent **new;
if (names_size == 0)
names_size = 10;
else
names_size *= 2;
new = (struct dirent **) realloc (names,
names_size * sizeof (struct dirent *));
if (new == NULL)
break;
names = new;
}
dsize = ¤t->d_name[_D_ALLOC_NAMLEN(current)] - (char*)current;
vnew = (struct dirent *) malloc (dsize);
if (vnew == NULL)
break;
names[pos++] = (struct dirent *) memcpy (vnew, current, dsize);
}
}
if (unlikely(errno != 0))
{
save = errno;
closedir (dp);
while (pos > 0)
free (names[--pos]);
free (names);
__set_errno (save);
return -1;
}
closedir (dp);
__set_errno (save);
/* Sort the list if we have a comparison function to sort with. */
if (compar != NULL)
qsort (names, pos, sizeof (struct dirent *), (comparison_fn_t) compar);
*namelist = names;
return pos;
}
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