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
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
|
/*
* udev_volume_id - udev callout to read filesystem label and uuid
*
* Copyright (C) 2005 Kay Sievers <kay.sievers@vrfy.org>
*
* sample udev rule for creation of a symlink with the filsystem uuid:
* KERNEL="sd*", PROGRAM="/sbin/udev_volume_id -u %N", SYMLINK="%c"
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation version 2 of the License.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <ctype.h>
#include <sys/ioctl.h>
#include "../../udev_utils.h"
#include "../../logging.h"
#include "volume_id/volume_id.h"
#include "volume_id/dasd.h"
#define BLKGETSIZE64 _IOR(0x12,114,size_t)
#ifdef USE_LOG
void log_message(int level, const char *format, ...)
{
va_list args;
va_start(args, format);
vsyslog(level, format, args);
va_end(args);
}
#endif
extern int optind;
int main(int argc, char *argv[])
{
const char help[] = "usage: udev_volume_id [-t|-l|-u] <device>\n"
" -t filesystem type\n"
" -l filesystem label\n"
" -u filesystem uuid\n"
"\n";
static const char short_options[] = "htlu";
struct volume_id *vid = NULL;
const char *device;
char print = 'a';
static char name[VOLUME_ID_LABEL_SIZE];
int len, i, j;
unsigned long long size;
int rc = 1;
logging_init("udev_volume_id");
while (1) {
int option;
option = getopt(argc, argv, short_options);
if (option == -1)
break;
switch (option) {
case 't':
print = 't';
continue;
case 'l':
print = 'l';
continue;
case 'u':
print = 'u';
continue;
case 'h':
case '?':
default:
printf(help);
exit(1);
}
}
device = argv[optind];
if (device == NULL) {
printf(help);
exit(1);
}
vid = volume_id_open_node(device);
if (vid == NULL) {
printf("error open volume\n");
goto exit;
}
if (ioctl(vid->fd, BLKGETSIZE64, &size) != 0)
size = 0;
if (volume_id_probe_all(vid, 0, size) == 0)
goto print;
if (volume_id_probe_dasd(vid) == 0)
goto print;
printf("unknown volume type\n");
goto exit;
print:
len = strnlen(vid->label, VOLUME_ID_LABEL_SIZE);
/* remove trailing spaces */
while (len > 0 && isspace(vid->label[len-1]))
len--;
name[len] = '\0';
/* substitute chars */
i = 0;
j = 0;
while (j < len) {
switch(vid->label[j]) {
case '/' :
break;
case ' ' :
name[i++] = '_';
break;
default :
name[i++] = vid->label[j];
}
j++;
}
name[i] = '\0';
switch (print) {
case 't':
printf("%s\n", vid->type);
break;
case 'l':
if (name[0] == '\0' ||
(vid->usage_id != VOLUME_ID_FILESYSTEM && vid->usage_id != VOLUME_ID_DISKLABEL)) {
rc = 2;
goto exit;
}
printf("%s\n", name);
break;
case 'u':
if (vid->uuid[0] == '\0' || vid->usage_id != VOLUME_ID_FILESYSTEM) {
rc = 2;
goto exit;
}
printf("%s\n", vid->uuid);
break;
case 'a':
printf("F:%s\n", vid->usage);
printf("T:%s\n", vid->type);
printf("V:%s\n", vid->type_version);
printf("L:%s\n", vid->label);
printf("N:%s\n", name);
printf("U:%s\n", vid->uuid);
}
rc = 0;
exit:
if (vid != NULL)
volume_id_close(vid);
logging_close();
exit(rc);
}
|
