1 /* $OpenBSD: readdir.c,v 1.8 2006/10/11 20:56:59 deraadt 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
39
40 int
41 opendir(char *name)
42 {
43 struct stat sb;
44 int fd;
45
46 if (stat(name, &sb) < 0)
47 return -1;
48
49 if (!S_ISDIR(sb.st_mode)) {
50 errno = ENOTDIR;
51 return -1;
52 }
53
54 /* XXX rewind needed for some dirs */
55 #ifdef __INTERNAL_LIBSA_CREAD
56 if ((fd = oopen(name, O_RDONLY)) >= 0)
57 olseek(fd, 0, 0);
58 #else
59 if ((fd = open(name, O_RDONLY)) >= 0)
60 lseek(fd, 0, SEEK_SET);
61 #endif
62
63 return fd;
64 }
65
66 int
67 readdir(int fd, char *dest)
68 {
69 struct open_file *f = &files[fd];
70
71 if (fd < 0 || fd >= SOPEN_MAX ||
72 !((f = &files[fd])->f_flags & F_READ)) {
73 errno = EBADF;
74 return (-1);
75 }
76
77 if (f->f_flags & F_RAW) {
78 errno = EOPNOTSUPP;
79 return (-1);
80 }
81 if ((errno = (f->f_ops->readdir)(f, dest)))
82 return (-1);
83
84 return 0;
85 }
86
87 void
88 closedir(int fd)
89 {
90 #ifdef __INTERNAL_LIBSA_CREAD
91 oclose(fd);
92 #else
93 close(fd);
94 #endif
95 }
96
97 #endif /* NO_READDIR */