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
|
/*
* probe disks for filesystems and partitions
*
* Copyright (C) 2011 Kay Sievers <kay.sievers@vrfy.org>
* Copyright (C) 2011 Karel Zak <kzak@redhat.com>
*
* 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, either version 2 of the License, or
* (at your option) any later version.
*
* 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, see <http://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <blkid/blkid.h>
#include "udev.h"
static void print_property(const char *name, const char *value)
{
char enc[265], safe[256];
size_t namelen = strlen(name);
enc[0] = '\0';
safe[0] = '\0';
if (!strcmp(name, "TYPE") || !strcmp(name, "VERSION")) {
blkid_encode_string(value, enc, sizeof(enc));
printf("ID_FS_%s=%s\n", name, enc);
} else if (!strcmp(name, "UUID") ||
!strcmp(name, "LABEL") ||
!strcmp(name, "UUID_SUB")) {
blkid_safe_string(value, safe, sizeof(safe));
printf("ID_FS_%s=%s\n", name, safe);
blkid_encode_string(value, enc, sizeof(enc));
printf("ID_FS_%s_ENC=%s\n", name, enc);
} else if (!strcmp(name, "PTTYPE")) {
printf("ID_PART_TABLE_TYPE=%s\n", value);
} else if (!strcmp(name, "PART_ENTRY_NAME") ||
!strcmp(name, "PART_ENTRY_TYPE")) {
blkid_encode_string(value, enc, sizeof(enc));
printf("ID_%s=%s\n", name, enc);
} else if (!strncmp(name, "PART_ENTRY_", 11))
printf("ID_%s=%s\n", name, value);
else if (namelen >= 15 && (
!strcmp(name + (namelen - 12), "_SECTOR_SIZE") ||
!strcmp(name + (namelen - 8), "_IO_SIZE") ||
!strcmp(name, "ALIGNMENT_OFFSET")))
printf("ID_IOLIMIT_%s=%s\n", name, value);
else
printf("ID_FS_%s=%s\n", name, value);
}
static int probe_superblocks(blkid_probe pr)
{
struct stat st;
int rc;
if (fstat(blkid_probe_get_fd(pr), &st))
return -1;
blkid_probe_enable_partitions(pr, 1);
if (!S_ISCHR(st.st_mode) && blkid_probe_get_size(pr) <= 1024 * 1440 &&
blkid_probe_is_wholedisk(pr)) {
/*
* check if the small disk is partitioned, if yes then
* don't probe for filesystems.
*/
blkid_probe_enable_superblocks(pr, 0);
rc = blkid_do_fullprobe(pr);
if (rc < 0)
return rc; /* -1 = error, 1 = nothing, 0 = succes */
if (blkid_probe_lookup_value(pr, "PTTYPE", NULL, NULL) == 0)
return 0; /* partition table detected */
}
blkid_probe_set_partitions_flags(pr, BLKID_PARTS_ENTRY_DETAILS);
blkid_probe_enable_superblocks(pr, 1);
return blkid_do_safeprobe(pr);
}
static int builtin_blkid(struct udev_device *dev, int argc, char *argv[], bool test)
{
char *device = "/dev/sda3";
int64_t offset = 0;
//int noraid = 0;
int fd = -1;
blkid_probe pr;
const char *data;
const char *name;
int nvals;
int i;
size_t len;
int err = 0;
//FIXME: read offset, read noraid
pr = blkid_new_probe();
if (!pr) {
err = -ENOMEM;
return EXIT_FAILURE;
}
blkid_probe_set_superblocks_flags(pr,
BLKID_SUBLKS_LABEL | BLKID_SUBLKS_UUID |
BLKID_SUBLKS_TYPE | BLKID_SUBLKS_SECTYPE |
BLKID_SUBLKS_USAGE | BLKID_SUBLKS_VERSION);
fd = open(device, O_RDONLY|O_CLOEXEC);
if (fd < 0) {
fprintf(stderr, "error: %s: %m\n", device);
goto out;
}
err = blkid_probe_set_device(pr, fd, offset, 0);
if (err < 0)
goto out;
err = probe_superblocks(pr);
if (err < 0)
goto out;
nvals = blkid_probe_numof_values(pr);
for (i = 0; i < nvals; i++) {
if (blkid_probe_get_value(pr, i, &name, &data, &len))
continue;
len = strnlen((char *) data, len);
print_property(name, (char *) data);
}
blkid_free_probe(pr);
out:
if (fd > 0)
close(fd);
if (err < 0)
return EXIT_FAILURE;
return EXIT_SUCCESS;
}
const struct udev_builtin udev_builtin_blkid = {
.name = "blkid",
.cmd = builtin_blkid,
.help = "filesystem and partition probing",
.run_once = true,
};
|
