2 * probe disks for filesystems and partitions
4 * Copyright (C) 2011 Kay Sievers <kay.sievers@vrfy.org>
5 * Copyright (C) 2011 Karel Zak <kzak@redhat.com>
7 * This program is free software: you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation, either version 2 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program. If not, see <http://www.gnu.org/licenses/>.
30 #include <blkid/blkid.h>
34 static void print_property(struct udev_device *dev, bool test, const char *name, const char *value)
40 if (!strcmp(name, "TYPE")) {
41 udev_builtin_add_property(dev, test, "ID_FS_TYPE", value);
43 } else if (!strcmp(name, "USAGE")) {
44 udev_builtin_add_property(dev, test, "ID_FS_USAGE", value);
46 } else if (!strcmp(name, "VERSION")) {
47 udev_builtin_add_property(dev, test, "ID_FS_VERSION", value);
49 } else if (!strcmp(name, "UUID")) {
50 blkid_safe_string(value, s, sizeof(s));
51 udev_builtin_add_property(dev, test, "ID_FS_UUID", s);
52 blkid_encode_string(value, s, sizeof(s));
53 udev_builtin_add_property(dev, test, "ID_FS_UUID_ENC", s);
55 } else if (!strcmp(name, "UUID_SUB")) {
56 blkid_safe_string(value, s, sizeof(s));
57 udev_builtin_add_property(dev, test, "ID_FS_UUID_SUB", s);
58 blkid_encode_string(value, s, sizeof(s));
59 udev_builtin_add_property(dev, test, "ID_FS_UUID_SUB_ENC", s);
61 } else if (!strcmp(name, "LABEL")) {
62 blkid_safe_string(value, s, sizeof(s));
63 udev_builtin_add_property(dev, test, "ID_FS_LABEL", s);
64 blkid_encode_string(value, s, sizeof(s));
65 udev_builtin_add_property(dev, test, "ID_FS_LABEL_ENC", s);
67 } else if (!strcmp(name, "PTTYPE")) {
68 udev_builtin_add_property(dev, test, "ID_PART_TABLE_TYPE", value);
70 } else if (!strcmp(name, "PART_ENTRY_NAME")) {
71 blkid_encode_string(value, s, sizeof(s));
72 udev_builtin_add_property(dev, test, "ID_PART_ENTRY_NAME", s);
74 } else if (!strcmp(name, "PART_ENTRY_TYPE")) {
75 blkid_encode_string(value, s, sizeof(s));
76 udev_builtin_add_property(dev, test, "ID_PART_ENTRY_TYPE", s);
78 } else if (!strncmp(name, "PART_ENTRY_", 11)) {
79 util_strscpyl(s, sizeof(s), "ID_", name, NULL);
80 udev_builtin_add_property(dev, test, s, value);
84 static int probe_superblocks(blkid_probe pr)
89 if (fstat(blkid_probe_get_fd(pr), &st))
92 blkid_probe_enable_partitions(pr, 1);
94 if (!S_ISCHR(st.st_mode) && blkid_probe_get_size(pr) <= 1024 * 1440 &&
95 blkid_probe_is_wholedisk(pr)) {
97 * check if the small disk is partitioned, if yes then
98 * don't probe for filesystems.
100 blkid_probe_enable_superblocks(pr, 0);
102 rc = blkid_do_fullprobe(pr);
104 return rc; /* -1 = error, 1 = nothing, 0 = succes */
106 if (blkid_probe_lookup_value(pr, "PTTYPE", NULL, NULL) == 0)
107 return 0; /* partition table detected */
110 blkid_probe_set_partitions_flags(pr, BLKID_PARTS_ENTRY_DETAILS);
111 blkid_probe_enable_superblocks(pr, 1);
113 return blkid_do_safeprobe(pr);
116 static int builtin_blkid(struct udev_device *dev, int argc, char *argv[], bool test)
118 struct udev *udev = udev_device_get_udev(dev);
130 static const struct option options[] = {
131 { "offset", optional_argument, NULL, 'o' },
132 { "noraid", no_argument, NULL, 'R' },
139 option = getopt_long(argc, argv, "oR", options, NULL);
145 offset = strtoull(optarg, NULL, 0);
153 pr = blkid_new_probe();
159 blkid_probe_set_superblocks_flags(pr,
160 BLKID_SUBLKS_LABEL | BLKID_SUBLKS_UUID |
161 BLKID_SUBLKS_TYPE | BLKID_SUBLKS_SECTYPE |
162 BLKID_SUBLKS_USAGE | BLKID_SUBLKS_VERSION);
165 blkid_probe_filter_superblocks_usage(pr, BLKID_FLTR_NOTIN, BLKID_USAGE_RAID);
167 fd = open(udev_device_get_devnode(dev), O_RDONLY|O_CLOEXEC);
169 fprintf(stderr, "error: %s: %m\n", udev_device_get_devnode(dev));
173 err = blkid_probe_set_device(pr, fd, offset, 0);
177 info(udev, "probe %s %sraid offset=%llu\n",
178 udev_device_get_devnode(dev),
179 noraid ? "no" : "", (unsigned long long) offset);
181 err = probe_superblocks(pr);
185 nvals = blkid_probe_numof_values(pr);
186 for (i = 0; i < nvals; i++) {
187 if (blkid_probe_get_value(pr, i, &name, &data, &len))
189 len = strnlen((char *) data, len);
190 print_property(dev, test, name, (char *) data);
193 blkid_free_probe(pr);
202 const struct udev_builtin udev_builtin_blkid = {
204 .cmd = builtin_blkid,
205 .help = "filesystem and partition probing",