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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	lib/libutil/readlabel.c	Lines:	0	55	0.0 %
Date:	2017-11-13	Branches:	0	35	0.0 %


/*	$OpenBSD: readlabel.c,v 1.14 2016/08/30 14:44:45 guenther Exp $	*/

/*
 * Copyright (c) 1996, Jason Downs.  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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``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 AUTHOR(S) 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/disk.h>
#include <sys/dkio.h>
#define DKTYPENAMES
#include <sys/disklabel.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <stdio.h>
#include <err.h>
#include <errno.h>
#include <limits.h>
#include <fcntl.h>
#include <paths.h>
#include <string.h>
#include <unistd.h>

#include "util.h"

/*
 * Try to get a disklabel for the specified device, and return mount_xxx
 * style filesystem type name for the specified partition.
 */
char *
readlabelfs(char *device, int verbose)
{
	char rpath[PATH_MAX];
	struct dk_diskmap dm;
	struct disklabel dk;
	char part, *type;
	struct stat sbuf;
	int fd = -1;

	/* Perform disk mapping if device is given as a DUID. */
	if (isduid(device, 0)) {
		if ((fd = open("/dev/diskmap", O_RDONLY|O_CLOEXEC)) != -1) {
			bzero(&dm, sizeof(struct dk_diskmap));
			strlcpy(rpath, device, sizeof(rpath));
			part = rpath[strlen(rpath) - 1];
			dm.device = rpath;
			dm.fd = fd;
			dm.flags = DM_OPENPART;
			if (ioctl(fd, DIOCMAP, &dm) == -1)
				close(fd);
			else
				goto disklabel;
		}
	}

	/* Assuming device is of the form /dev/??p, build a raw partition. */
	if (stat(device, &sbuf) < 0) {
		if (verbose)
			warn("%s", device);
		return (NULL);
	}
	switch (sbuf.st_mode & S_IFMT) {
	case S_IFCHR:
		/* Ok... already a raw device.  Hmm. */
		strlcpy(rpath, device, sizeof(rpath));

		/* Change partition name. */
		part = rpath[strlen(rpath) - 1];
		rpath[strlen(rpath) - 1] = 'a' + getrawpartition();
		break;
	case S_IFBLK:
		if (strlen(device) > sizeof(_PATH_DEV) - 1) {
			snprintf(rpath, sizeof(rpath), "%sr%s", _PATH_DEV,
			    &device[sizeof(_PATH_DEV) - 1]);
			/* Change partition name. */
			part = rpath[strlen(rpath) - 1];
			rpath[strlen(rpath) - 1] = 'a' + getrawpartition();
			break;
		}
		/* FALLTHROUGH */
	default:
		if (verbose)
			warnx("%s: not a device node", device);
		return (NULL);
	}

	/* If rpath doesn't exist, change that partition back. */
	fd = open(rpath, O_RDONLY|O_CLOEXEC);
	if (fd < 0) {
		if (errno == ENOENT) {
			rpath[strlen(rpath) - 1] = part;

			fd = open(rpath, O_RDONLY|O_CLOEXEC);
			if (fd < 0) {
				if (verbose)
					warn("%s", rpath);
				return (NULL);
			}
		} else {
			if (verbose)
				warn("%s", rpath);
			return (NULL);
		}
	}

disklabel:

	if (ioctl(fd, DIOCGDINFO, &dk) < 0) {
		if (verbose)
			warn("%s: couldn't read disklabel", rpath);
		close(fd);
		return (NULL);
	}
	close(fd);

	if (dk.d_partitions[part - 'a'].p_fstype >= FSMAXTYPES) {
		if (verbose)
			warnx("%s: bad filesystem type in label", rpath);
		return (NULL);
	}

	type = fstypesnames[dk.d_partitions[part - 'a'].p_fstype];
	return ((type[0] == '\0') ? NULL : type);
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: readlabel.c,v 1.14 2016/08/30 14:44:45 guenther Exp $ */
2
3			/*
4			* Copyright (c) 1996, Jason Downs. 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			*
15			* THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS
16			* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
17			* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
18			* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT,
19			* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
20			* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
21			* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
22			* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23			* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24			* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25			* SUCH DAMAGE.
26			*/
27
28			#include <sys/types.h>
29			#include <sys/disk.h>
30			#include <sys/dkio.h>
31			#define DKTYPENAMES
32			#include <sys/disklabel.h>
33			#include <sys/ioctl.h>
34			#include <sys/stat.h>
35			#include <stdio.h>
36			#include <err.h>
37			#include <errno.h>
38			#include <limits.h>
39			#include <fcntl.h>
40			#include <paths.h>
41			#include <string.h>
42			#include <unistd.h>
43
44			#include "util.h"
45
46			/*
47			* Try to get a disklabel for the specified device, and return mount_xxx
48			* style filesystem type name for the specified partition.
49			*/
50			char *
51			readlabelfs(char *device, int verbose)
52			{
53			char rpath[PATH_MAX];
54			struct dk_diskmap dm;
55			struct disklabel dk;
56			char part, *type;
57			struct stat sbuf;
58			int fd = -1;
59
60			/* Perform disk mapping if device is given as a DUID. */
61			if (isduid(device, 0)) {
62			if ((fd = open("/dev/diskmap", O_RDONLY\|O_CLOEXEC)) != -1) {
63			bzero(&dm, sizeof(struct dk_diskmap));
64			strlcpy(rpath, device, sizeof(rpath));
65			part = rpath[strlen(rpath) - 1];
66			dm.device = rpath;
67			dm.fd = fd;
68			dm.flags = DM_OPENPART;
69			if (ioctl(fd, DIOCMAP, &dm) == -1)
70			close(fd);
71			else
72			goto disklabel;
73			}
74			}
75
76			/* Assuming device is of the form /dev/??p, build a raw partition. */
77			if (stat(device, &sbuf) < 0) {
78			if (verbose)
79			warn("%s", device);
80			return (NULL);
81			}
82			switch (sbuf.st_mode & S_IFMT) {
83			case S_IFCHR:
84			/* Ok... already a raw device. Hmm. */
85			strlcpy(rpath, device, sizeof(rpath));
86
87			/* Change partition name. */
88			part = rpath[strlen(rpath) - 1];
89			rpath[strlen(rpath) - 1] = 'a' + getrawpartition();
90			break;
91			case S_IFBLK:
92			if (strlen(device) > sizeof(_PATH_DEV) - 1) {
93			snprintf(rpath, sizeof(rpath), "%sr%s", _PATH_DEV,
94			&device[sizeof(_PATH_DEV) - 1]);
95			/* Change partition name. */
96			part = rpath[strlen(rpath) - 1];
97			rpath[strlen(rpath) - 1] = 'a' + getrawpartition();
98			break;
99			}
100			/* FALLTHROUGH */
101			default:
102			if (verbose)
103			warnx("%s: not a device node", device);
104			return (NULL);
105			}
106
107			/* If rpath doesn't exist, change that partition back. */
108			fd = open(rpath, O_RDONLY\|O_CLOEXEC);
109			if (fd < 0) {
110			if (errno == ENOENT) {
111			rpath[strlen(rpath) - 1] = part;
112
113			fd = open(rpath, O_RDONLY\|O_CLOEXEC);
114			if (fd < 0) {
115			if (verbose)
116			warn("%s", rpath);
117			return (NULL);
118			}
119			} else {
120			if (verbose)
121			warn("%s", rpath);
122			return (NULL);
123			}
124			}
125
126			disklabel:
127
128			if (ioctl(fd, DIOCGDINFO, &dk) < 0) {
129			if (verbose)
130			warn("%s: couldn't read disklabel", rpath);
131			close(fd);
132			return (NULL);
133			}
134			close(fd);
135
136			if (dk.d_partitions[part - 'a'].p_fstype >= FSMAXTYPES) {
137			if (verbose)
138			warnx("%s: bad filesystem type in label", rpath);
139			return (NULL);
140			}
141
142			type = fstypesnames[dk.d_partitions[part - 'a'].p_fstype];
143			return ((type[0] == '\0') ? NULL : type);
144			}