82 lines
1.9 KiB
C
82 lines
1.9 KiB
C
|
/* -*-comment-start: "//";comment-end:""-*-
|
||
|
|
* GNU Mes --- Maxwell Equations of Software
|
||
|
|
* Copyright (C) 1991-1996,98,2000,2001 Free Software Foundation, Inc.
|
||
|
|
* Copyright © 2018 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
|
||
|
|
*
|
||
|
|
* This file is part of GNU Mes.
|
||
|
|
*
|
||
|
|
* GNU Mes is free software; you can redistribute it and/or modify it
|
||
|
|
* under the terms of the GNU General Public License as published by
|
||
|
|
* the Free Software Foundation; either version 3 of the License, or (at
|
||
|
|
* your option) any later version.
|
||
|
|
*
|
||
|
|
* GNU Mes 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 General Public License for more details.
|
||
|
|
*
|
||
|
|
* You should have received a copy of the GNU General Public License
|
||
|
|
* along with GNU Mes. If not, see <http://www.gnu.org/licenses/>.
|
||
|
|
*/
|
||
|
|
|
||
|
|
// Taken from GNU C Library 2.2.5
|
||
|
|
|
||
|
|
#include <errno.h>
|
||
|
|
#include <limits.h>
|
||
|
|
#include <stddef.h>
|
||
|
|
#include <stdlib.h>
|
||
|
|
#include <dirent.h>
|
||
|
|
#include <fcntl.h>
|
||
|
|
#include <sys/types.h>
|
||
|
|
#include <sys/stat.h>
|
||
|
|
#include <unistd.h>
|
||
|
|
#include <stdio.h>
|
||
|
|
|
||
|
|
#include <dirstream.h>
|
||
|
|
|
||
|
|
/* Open a directory stream on NAME. */
|
||
|
|
DIR *
|
||
|
|
opendir (char const *name)
|
||
|
|
{
|
||
|
|
DIR *dirp;
|
||
|
|
struct stat statbuf;
|
||
|
|
int fd;
|
||
|
|
size_t allocation;
|
||
|
|
int save_errno;
|
||
|
|
|
||
|
|
if (name[0] == '\0')
|
||
|
|
{
|
||
|
|
/* POSIX.1-1990 says an empty name gets ENOENT;
|
||
|
|
but `open' might like it fine. */
|
||
|
|
errno = ENOENT;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
fd = open (name, O_RDONLY|O_DIRECTORY);
|
||
|
|
if (fd < 0)
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
if (fstat (fd, &statbuf) < 0)
|
||
|
|
goto lose;
|
||
|
|
|
||
|
|
if (fcntl (fd, F_SETFD, FD_CLOEXEC) < 0)
|
||
|
|
goto lose;
|
||
|
|
|
||
|
|
allocation = statbuf.st_blksize;
|
||
|
|
|
||
|
|
dirp = (DIR *) calloc (1, sizeof (DIR) + allocation);
|
||
|
|
if (!dirp)
|
||
|
|
lose:
|
||
|
|
{
|
||
|
|
save_errno = errno;
|
||
|
|
close (fd);
|
||
|
|
errno = save_errno;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
dirp->data = (char *) (dirp + 1);
|
||
|
|
dirp->allocation = allocation;
|
||
|
|
dirp->fd = fd;
|
||
|
|
|
||
|
|
return dirp;
|
||
|
|
}
|