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/* scandir.cc
Copyright 1998, 1999, 2000, 2001 Red Hat, Inc.
Written by Corinna Vinschen <corinna.vinschen@cityweb.de>
This file is part of Cygwin.
This software is a copyrighted work licensed under the terms of the
Cygwin license. Please consult the file "CYGWIN_LICENSE" for
details. */
#include "winsup.h"
#include <dirent.h>
#include <stdlib.h>
#include "cygerrno.h"
extern "C" int
alphasort (const struct dirent **a, const struct dirent **b)
{
return strcoll ((*a)->d_name, (*b)->d_name);
}
extern "C" int
scandir (const char *dir,
struct dirent ***namelist,
int (*select) (const struct dirent *),
int (*compar) (const struct dirent **, const struct dirent **))
{
DIR *dirp;
struct dirent *ent, *etmp, **nl = NULL, **ntmp;
int count = 0;
int allocated = 0;
if (!(dirp = opendir (dir)))
return -1;
int prior_errno = get_errno ();
set_errno (0);
if (!compar)
compar = alphasort;
while ((ent = readdir (dirp)))
{
if (!select || select (ent))
{
/* Ignore error from readdir/select. See POSIX specs. */
set_errno (0);
if (count == allocated)
{
if (allocated == 0)
allocated = 10;
else
allocated *= 2;
ntmp = (struct dirent **) realloc (nl, allocated * sizeof *nl);
if (!ntmp)
{
set_errno (ENOMEM);
break;
}
nl = ntmp;
}
if (!(etmp = (struct dirent *) malloc (sizeof *ent)))
{
set_errno (ENOMEM);
break;
}
*etmp = *ent;
nl[count++] = etmp;
}
}
if ((prior_errno = get_errno ()) != 0)
{
closedir (dirp);
if (nl)
{
while (count > 0)
free (nl[--count]);
free (nl);
}
/* Ignore errors from closedir() and what not else. */
set_errno (prior_errno);
return -1;
}
closedir (dirp);
set_errno (prior_errno);
qsort (nl, count, sizeof *nl, (int (*)(const void *, const void *)) compar);
if (namelist)
*namelist = nl;
return count;
}
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