Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	lib/libc/gen/opendir.c	Lines:	22	39	56.4 %
Date:	2017-11-07	Branches:	7	20	35.0 %


/*	$OpenBSD: opendir.c,v 1.30 2016/09/21 04:38:56 guenther Exp $ */
/*
 * Copyright (c) 1983, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <sys/types.h>
#include <sys/stat.h>

#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
#include <stdlib.h>
#include <unistd.h>

#include "telldir.h"

static DIR *__fdopendir(int fd);

/*
 * Open a directory specified by name.
 */
DIR *
opendir(const char *name)
{
	DIR *dirp;
	int fd;

	if ((fd = open(name, O_RDONLY | O_DIRECTORY | O_CLOEXEC)) == -1)
		return (NULL);
	dirp = __fdopendir(fd);
	if (dirp == NULL)
		close(fd);
	return (dirp);
}
DEF_WEAK(opendir);

/*
 * Open a directory specified by file descriptor.
 */
DIR *
fdopendir(int fd)
{
	DIR *dirp;
	int flags;

	if ((flags = fcntl(fd, F_GETFL)) == -1)
		return (NULL);
	if ((flags & O_ACCMODE) != O_RDONLY && (flags & O_ACCMODE) != O_RDWR) {
		errno = EBADF;
		return (NULL);
	}
	dirp = __fdopendir(fd);
	if (dirp != NULL) {
		/* Record current offset for immediate telldir() */
		dirp->dd_bufpos = dirp->dd_curpos = lseek(fd, 0, SEEK_CUR);

		/*
		 * POSIX doesn't require fdopendir() to set
		 * FD_CLOEXEC, so it's okay for this to fail.
		 */
		(void)fcntl(fd, F_SETFD, FD_CLOEXEC);
	}
	return (dirp);
}
DEF_WEAK(fdopendir);

static DIR *
__fdopendir(int fd)
{
	DIR *dirp;
	struct stat sb;
	int pageoffset;

	if (fstat(fd, &sb))
		return (NULL);
	if (!S_ISDIR(sb.st_mode)) {
		errno = ENOTDIR;
		return (NULL);
	}
	if ((dirp = malloc(sizeof(DIR))) == NULL)
		return (NULL);

	pageoffset = getpagesize() - 1;
	dirp->dd_len = ((int)sb.st_blksize * 4 + pageoffset) & ~pageoffset;
	dirp->dd_buf = malloc(dirp->dd_len);
	if (dirp->dd_buf == NULL) {
		free(dirp);
		return (NULL);
	}

	dirp->dd_size = 0;
	dirp->dd_loc = 0;
	dirp->dd_fd = fd;
	dirp->dd_lock = NULL;
	dirp->dd_curpos = 0;
	dirp->dd_bufpos = 0;

	return (dirp);
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: opendir.c,v 1.30 2016/09/21 04:38:56 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 <sys/types.h>
32			#include <sys/stat.h>
33
34			#include <dirent.h>
35			#include <errno.h>
36			#include <fcntl.h>
37			#include <stdlib.h>
38			#include <unistd.h>
39
40			#include "telldir.h"
41
42			static DIR *__fdopendir(int fd);
43
44			/*
45			* Open a directory specified by name.
46			*/
47			DIR *
48			opendir(const char *name)
49			{
50			DIR *dirp;
51			int fd;
52
53	✓✓	27156	if ((fd = open(name, O_RDONLY \| O_DIRECTORY \| O_CLOEXEC)) == -1)
54		745	return (NULL);
55		12833	dirp = __fdopendir(fd);
56	✗✓	12833	if (dirp == NULL)
57			close(fd);
58		12833	return (dirp);
59		13578	}
60			DEF_WEAK(opendir);
61
62			/*
63			* Open a directory specified by file descriptor.
64			*/
65			DIR *
66			fdopendir(int fd)
67			{
68			DIR *dirp;
69			int flags;
70
71			if ((flags = fcntl(fd, F_GETFL)) == -1)
72			return (NULL);
73			if ((flags & O_ACCMODE) != O_RDONLY && (flags & O_ACCMODE) != O_RDWR) {
74			errno = EBADF;
75			return (NULL);
76			}
77			dirp = __fdopendir(fd);
78			if (dirp != NULL) {
79			/* Record current offset for immediate telldir() */
80			dirp->dd_bufpos = dirp->dd_curpos = lseek(fd, 0, SEEK_CUR);
81
82			/*
83			* POSIX doesn't require fdopendir() to set
84			* FD_CLOEXEC, so it's okay for this to fail.
85			*/
86			(void)fcntl(fd, F_SETFD, FD_CLOEXEC);
87			}
88			return (dirp);
89			}
90			DEF_WEAK(fdopendir);
91
92			static DIR *
93			__fdopendir(int fd)
94			{
95			DIR *dirp;
96		25666	struct stat sb;
97			int pageoffset;
98
99	✗✓	12833	if (fstat(fd, &sb))
100			return (NULL);
101	✗✓	12833	if (!S_ISDIR(sb.st_mode)) {
102			errno = ENOTDIR;
103			return (NULL);
104			}
105	✗✓	12833	if ((dirp = malloc(sizeof(DIR))) == NULL)
106			return (NULL);
107
108		12833	pageoffset = getpagesize() - 1;
109		12833	dirp->dd_len = ((int)sb.st_blksize * 4 + pageoffset) & ~pageoffset;
110		12833	dirp->dd_buf = malloc(dirp->dd_len);
111	✗✓	12833	if (dirp->dd_buf == NULL) {
112			free(dirp);
113			return (NULL);
114			}
115
116		12833	dirp->dd_size = 0;
117		12833	dirp->dd_loc = 0;
118		12833	dirp->dd_fd = fd;
119		12833	dirp->dd_lock = NULL;
120		12833	dirp->dd_curpos = 0;
121		12833	dirp->dd_bufpos = 0;
122
123		12833	return (dirp);
124		12833	}