1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License").  You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22/*
23 * Copyright (c) 1995, by Sun Microsystems, Inc.
24 * All rights reserved.
25 */
26
27#pragma ident	"%Z%%M%	%I%	%E% SMI"
28
29#include <sys/param.h>
30#include <sys/stat.h>
31#include <dirent.h>
32#include <errno.h>
33#include <fcntl.h>
34
35/*
36 * open a directory.
37 */
38DIR *
39opendir(name)
40	char *name;
41{
42	register DIR *dirp;
43	register int fd;
44	struct stat sb;
45	extern int errno;
46	extern char *malloc();
47	extern int open(), close(), fstat();
48
49	if ((fd = open(name, O_RDONLY | O_NDELAY)) == -1)
50		return (NULL);
51	if (fstat(fd, &sb) == -1) {
52		(void) close(fd);
53		return (NULL);
54	}
55	if ((sb.st_mode & S_IFMT) != S_IFDIR) {
56		errno = ENOTDIR;
57		(void) close(fd);
58		return (NULL);
59	}
60	if (((dirp = (DIR *)malloc(sizeof(DIR))) == NULL) ||
61	    ((dirp->dd_buf = malloc(sb.st_blksize)) == NULL)) {
62		if (dirp)
63			free(dirp);
64		(void) close(fd);
65		return (NULL);
66	}
67	dirp->dd_fd = fd;
68	dirp->dd_loc = 0;
69	dirp->dd_size = 0;
70	dirp->dd_bsize = sb.st_blksize;
71	dirp->dd_off = 0;
72	(void) fcntl(fd, F_SETFD, FD_CLOEXEC);
73	return (dirp);
74}
75