GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/libc/gen/readdir.c Lines: 0 27 0.0 %
Date: 2017-11-13 Branches: 0 18 0.0 %

Line Branch Exec Source
1
/*	$OpenBSD: readdir.c,v 1.22 2015/09/12 13:34:22 guenther Exp $ */
2
/*
3
 * Copyright (c) 1983, 1993
4
 *	The Regents of the University of California.  All rights reserved.
5
 *
6
 * Redistribution and use in source and binary forms, with or without
7
 * modification, are permitted provided that the following conditions
8
 * are met:
9
 * 1. Redistributions of source code must retain the above copyright
10
 *    notice, this list of conditions and the following disclaimer.
11
 * 2. Redistributions in binary form must reproduce the above copyright
12
 *    notice, this list of conditions and the following disclaimer in the
13
 *    documentation and/or other materials provided with the distribution.
14
 * 3. Neither the name of the University nor the names of its contributors
15
 *    may be used to endorse or promote products derived from this software
16
 *    without specific prior written permission.
17
 *
18
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
19
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
22
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28
 * SUCH DAMAGE.
29
 */
30
31
#include <dirent.h>
32
#include <errno.h>
33
#include "telldir.h"
34
#include "thread_private.h"
35
36
/*
37
 * get next entry in a directory.
38
 */
39
int
40
_readdir_unlocked(DIR *dirp, struct dirent **result)
41
{
42
	struct dirent *dp;
43
44
	*result = NULL;
45
	for (;;) {
46
		if (dirp->dd_loc >= dirp->dd_size) {
47
			dirp->dd_loc = 0;
48
			dirp->dd_size = getdents(dirp->dd_fd, dirp->dd_buf,
49
			    dirp->dd_len);
50
			if (dirp->dd_size == 0)
51
				return (0);
52
			if (dirp->dd_size < 0)
53
				return (-1);
54
		}
55
		dp = (struct dirent *)(dirp->dd_buf + dirp->dd_loc);
56
		if ((long)dp & 03 ||	/* bogus pointer check */
57
		    dp->d_reclen <= 0 ||
58
		    dp->d_reclen > dirp->dd_len + 1 - dirp->dd_loc) {
59
			errno = EINVAL;
60
			return (-1);
61
		}
62
		dirp->dd_loc += dp->d_reclen;
63
		if (dp->d_ino == 0)
64
			continue;
65
		dirp->dd_curpos = dp->d_off;
66
		*result = dp;
67
		return (0);
68
	}
69
}
70
71
struct dirent *
72
readdir(DIR *dirp)
73
{
74
	struct dirent *dp;
75
76
	_MUTEX_LOCK(&dirp->dd_lock);
77
	_readdir_unlocked(dirp, &dp);
78
	_MUTEX_UNLOCK(&dirp->dd_lock);
79
80
	return (dp);
81
}
82
DEF_WEAK(readdir);