1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
|
/* $OpenBSD: readlabel.c,v 1.6 2002/02/21 07:32:55 fgsch 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 <stdio.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <paths.h>
#include <string.h>
#include <unistd.h>
#include <sys/dkio.h>
#define DKTYPENAMES
#include <sys/disklabel.h>
#include <sys/ioctl.h>
#include <sys/param.h>
#include <sys/stat.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(device, verbose)
char *device;
int verbose;
{
char rpath[MAXPATHLEN];
char part, *type;
struct stat sbuf;
struct disklabel dk;
int fd;
/* 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. */
strncpy(rpath, device, sizeof(rpath));
rpath[sizeof(rpath) - 1] = '\0';
/* Change partition name. */
part = rpath[strlen(rpath) - 1];
rpath[strlen(rpath) - 1] = 'a' + getrawpartition();
break;
case S_IFBLK:
if (strlen(device) > sizeo(_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;
}
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);
if (fd < 0) {
if (errno == ENOENT) {
rpath[strlen(rpath) - 1] = part;
fd = open(rpath, O_RDONLY);
if (fd < 0) {
if (verbose)
warn("%s", rpath);
return(NULL);
}
} else {
if (verbose)
warn("%s", rpath);
return(NULL);
}
}
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);
}
|
