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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 */