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
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
|
/*
* 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.
*
*/
#ifndef _GNU_SOURCE
#define _GNU_SOURCE 1
#endif
#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 priority, const char *format, ...)
{
va_list args;
static int udev_log = -1;
if (udev_log == -1) {
const char *value;
value = getenv("UDEV_LOG");
if (value)
udev_log = log_priority(value);
else
udev_log = LOG_ERR;
}
if (priority > udev_log)
return;
va_start(args, format);
vsyslog(priority, format, args);
va_end(args);
}
#endif
static void set_str(char *to, const unsigned char *from, int count)
{
int i, j;
int len;
len = strnlen(from, count);
while (isspace(from[len-1]))
len--;
i = 0;
while (isspace(from[i]) && (i < len))
i++;
j = 0;
while (i < len) {
switch(from[i]) {
case '/':
break;
case ' ':
to[j++] = '_';
break;
default:
to[j++] = from[i];
}
i++;
}
to[j] = '\0';
}
int main(int argc, char *argv[])
{
const char help[] = "usage: udev_volume_id [--export|-t|-l|-u] <device>\n"
" --export\n"
" -t filesystem type\n"
" -l filesystem label\n"
" -u filesystem uuid\n"
"\n";
enum print_type {
PRINT_EXPORT,
PRINT_TYPE,
PRINT_LABEL,
PRINT_UUID,
} print = PRINT_EXPORT;
struct volume_id *vid = NULL;
static char name[VOLUME_ID_LABEL_SIZE];
int i;
unsigned long long size;
const char *node = NULL;
int rc = 0;
logging_init("udev_volume_id");
for (i = 1 ; i < argc; i++) {
char *arg = argv[i];
if (strcmp(arg, "--export") == 0) {
print = PRINT_EXPORT;
} else if (strcmp(arg, "-t") == 0) {
print = PRINT_TYPE;
} else if (strcmp(arg, "-l") == 0) {
print = PRINT_LABEL;
} else if (strcmp(arg, "-u") == 0) {
print = PRINT_UUID;
} else
node = arg;
}
if (!node) {
err("no node specified");
fprintf(stderr, help);
rc = 1;
goto exit;
}
vid = volume_id_open_node(node);
if (vid == NULL) {
fprintf(stderr, "error open volume\n");
rc = 2;
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;
fprintf(stderr, "unknown volume type\n");
rc = 3;
goto exit;
print:
set_str(name, vid->label, sizeof(vid->label));
switch (print) {
case PRINT_EXPORT:
printf("ID_FS_USAGE=%s\n", vid->usage);
printf("ID_FS_TYPE=%s\n", vid->type);
printf("ID_FS_VERSION=%s\n", vid->type_version);
printf("ID_FS_UUID=%s\n", vid->uuid);
printf("ID_FS_LABEL=%s\n", vid->label);
printf("ID_FS_LABEL_SAFE=%s\n", name);
break;
case PRINT_TYPE:
printf("%s\n", vid->type);
break;
case PRINT_LABEL:
if (name[0] == '\0' ||
(vid->usage_id != VOLUME_ID_FILESYSTEM && vid->usage_id != VOLUME_ID_DISKLABEL)) {
rc = 3;
goto exit;
}
printf("%s\n", name);
break;
case PRINT_UUID:
if (vid->uuid[0] == '\0' || vid->usage_id != VOLUME_ID_FILESYSTEM) {
rc = 4;
goto exit;
}
printf("%s\n", vid->uuid);
break;
}
exit:
if (vid != NULL)
volume_id_close(vid);
logging_close();
return rc;
}
|
