2 * probe disks for filesystems and partitions
4 * Copyright (C) 2011 Kay Sievers <kay@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 (streq(name, "TYPE")) {
41 udev_builtin_add_property(dev, test, "ID_FS_TYPE", value);
43 } else if (streq(name, "USAGE")) {
44 udev_builtin_add_property(dev, test, "ID_FS_USAGE", value);
46 } else if (streq(name, "VERSION")) {
47 udev_builtin_add_property(dev, test, "ID_FS_VERSION", value);
49 } else if (streq(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 (streq(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 (streq(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 (streq(name, "PTTYPE")) {
68 udev_builtin_add_property(dev, test, "ID_PART_TABLE_TYPE", value);
70 } else if (streq(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 (streq(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 (startswith(name, "PART_ENTRY_")) {
79 strscpyl(s, sizeof(s), "ID_", name, NULL);
80 udev_builtin_add_property(dev, test, s, value);
82 } else if (streq(name, "SYSTEM_ID")) {
83 blkid_encode_string(value, s, sizeof(s));
84 udev_builtin_add_property(dev, test, "ID_FS_SYSTEM_ID", s);
86 } else if (streq(name, "PUBLISHER_ID")) {
87 blkid_encode_string(value, s, sizeof(s));
88 udev_builtin_add_property(dev, test, "ID_FS_PUBLISHER_ID", s);
90 } else if (streq(name, "APPLICATION_ID")) {
91 blkid_encode_string(value, s, sizeof(s));
92 udev_builtin_add_property(dev, test, "ID_FS_APPLICATION_ID", s);
94 } else if (streq(name, "BOOT_SYSTEM_ID")) {
95 blkid_encode_string(value, s, sizeof(s));
96 udev_builtin_add_property(dev, test, "ID_FS_BOOT_SYSTEM_ID", s);
100 static int probe_superblocks(blkid_probe pr)
105 if (fstat(blkid_probe_get_fd(pr), &st))
108 blkid_probe_enable_partitions(pr, 1);
110 if (!S_ISCHR(st.st_mode) && blkid_probe_get_size(pr) <= 1024 * 1440 &&
111 blkid_probe_is_wholedisk(pr)) {
113 * check if the small disk is partitioned, if yes then
114 * don't probe for filesystems.
116 blkid_probe_enable_superblocks(pr, 0);
118 rc = blkid_do_fullprobe(pr);
120 return rc; /* -1 = error, 1 = nothing, 0 = succes */
122 if (blkid_probe_lookup_value(pr, "PTTYPE", NULL, NULL) == 0)
123 return 0; /* partition table detected */
126 blkid_probe_set_partitions_flags(pr, BLKID_PARTS_ENTRY_DETAILS);
127 blkid_probe_enable_superblocks(pr, 1);
129 return blkid_do_safeprobe(pr);
132 static int builtin_blkid(struct udev_device *dev, int argc, char *argv[], bool test)
145 static const struct option options[] = {
146 { "offset", optional_argument, NULL, 'o' },
147 { "noraid", no_argument, NULL, 'R' },
154 option = getopt_long(argc, argv, "oR", options, NULL);
160 offset = strtoull(optarg, NULL, 0);
168 pr = blkid_new_probe();
172 blkid_probe_set_superblocks_flags(pr,
173 BLKID_SUBLKS_LABEL | BLKID_SUBLKS_UUID |
174 BLKID_SUBLKS_TYPE | BLKID_SUBLKS_SECTYPE |
175 BLKID_SUBLKS_USAGE | BLKID_SUBLKS_VERSION);
178 blkid_probe_filter_superblocks_usage(pr, BLKID_FLTR_NOTIN, BLKID_USAGE_RAID);
180 fd = open(udev_device_get_devnode(dev), O_RDONLY|O_CLOEXEC);
182 fprintf(stderr, "error: %s: %m\n", udev_device_get_devnode(dev));
186 err = blkid_probe_set_device(pr, fd, offset, 0);
190 log_debug("probe %s %sraid offset=%llu\n",
191 udev_device_get_devnode(dev),
192 noraid ? "no" : "", (unsigned long long) offset);
194 err = probe_superblocks(pr);
198 nvals = blkid_probe_numof_values(pr);
199 for (i = 0; i < nvals; i++) {
200 if (blkid_probe_get_value(pr, i, &name, &data, &len))
202 len = strnlen((char *) data, len);
203 print_property(dev, test, name, (char *) data);
206 blkid_free_probe(pr);
215 const struct udev_builtin udev_builtin_blkid = {
217 .cmd = builtin_blkid,
218 .help = "filesystem and partition probing",