1/*	$OpenBSD: readdir.c,v 1.10 2022/01/11 06:35:03 visa Exp $	*/
2
3/*
4 * Copyright (c) 1996 Michael Shalayeff
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
18 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 *
28 */
29
30#ifndef NO_READDIR
31
32#include <sys/types.h>
33#include <sys/stat.h>
34#define _KERNEL
35#include <sys/fcntl.h>
36#undef _KERNEL
37#include "stand.h"
38
39int
40opendir(const char *name)
41{
42	struct stat sb;
43	int fd;
44
45	if (stat(name, &sb) < 0)
46		return -1;
47
48	if (!S_ISDIR(sb.st_mode)) {
49		errno = ENOTDIR;
50		return -1;
51	}
52
53	/* XXX rewind needed for some dirs */
54#ifdef __INTERNAL_LIBSA_CREAD
55	if ((fd = oopen(name, O_RDONLY)) >= 0)
56		olseek(fd, 0, 0);
57#else
58	if ((fd = open(name, O_RDONLY)) >= 0)
59		lseek(fd, 0, SEEK_SET);
60#endif
61
62	return fd;
63}
64
65int
66readdir(int fd, char *dest)
67{
68	struct open_file *f;
69
70	if (fd < 0 || fd >= SOPEN_MAX) {
71		errno = EBADF;
72		return (-1);
73	}
74	f = &files[fd];
75	if (!(f->f_flags & F_READ)) {
76		errno = EBADF;
77		return (-1);
78	}
79	if (f->f_flags & F_RAW) {
80		errno = EOPNOTSUPP;
81		return (-1);
82	}
83	if ((errno = (f->f_ops->readdir)(f, dest)))
84		return (-1);
85
86	return 0;
87}
88
89void
90closedir(int fd)
91{
92#ifdef __INTERNAL_LIBSA_CREAD
93	oclose(fd);
94#else
95	close(fd);
96#endif
97}
98
99#endif /* NO_READDIR */
100