/* * probe disks for filesystems and partitions * * Copyright (C) 2011 Kay Sievers <kay@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 <getopt.h> #include <sys/stat.h> #include <blkid/blkid.h> #include "udev.h" static void print_property(struct udev_device *dev, bool test, const char *name, const char *value) { char s[265]; s[0] = '\0'; if (streq(name, "TYPE")) { udev_builtin_add_property(dev, test, "ID_FS_TYPE", value); } else if (streq(name, "USAGE")) { udev_builtin_add_property(dev, test, "ID_FS_USAGE", value); } else if (streq(name, "VERSION")) { udev_builtin_add_property(dev, test, "ID_FS_VERSION", value); } else if (streq(name, "UUID")) { blkid_safe_string(value, s, sizeof(s)); udev_builtin_add_property(dev, test, "ID_FS_UUID", s); blkid_encode_string(value, s, sizeof(s)); udev_builtin_add_property(dev, test, "ID_FS_UUID_ENC", s); } else if (streq(name, "UUID_SUB")) { blkid_safe_string(value, s, sizeof(s)); udev_builtin_add_property(dev, test, "ID_FS_UUID_SUB", s); blkid_encode_string(value, s, sizeof(s)); udev_builtin_add_property(dev, test, "ID_FS_UUID_SUB_ENC", s); } else if (streq(name, "LABEL")) { blkid_safe_string(value, s, sizeof(s)); udev_builtin_add_property(dev, test, "ID_FS_LABEL", s); blkid_encode_string(value, s, sizeof(s)); udev_builtin_add_property(dev, test, "ID_FS_LABEL_ENC", s); } else if (streq(name, "PTTYPE")) { udev_builtin_add_property(dev, test, "ID_PART_TABLE_TYPE", value); } else if (streq(name, "PART_ENTRY_NAME")) { blkid_encode_string(value, s, sizeof(s)); udev_builtin_add_property(dev, test, "ID_PART_ENTRY_NAME", s); } else if (streq(name, "PART_ENTRY_TYPE")) { blkid_encode_string(value, s, sizeof(s)); udev_builtin_add_property(dev, test, "ID_PART_ENTRY_TYPE", s); } else if (startswith(name, "PART_ENTRY_")) { strscpyl(s, sizeof(s), "ID_", name, NULL); udev_builtin_add_property(dev, test, s, value); } else if (streq(name, "SYSTEM_ID")) { blkid_encode_string(value, s, sizeof(s)); udev_builtin_add_property(dev, test, "ID_FS_SYSTEM_ID", s); } else if (streq(name, "PUBLISHER_ID")) { blkid_encode_string(value, s, sizeof(s)); udev_builtin_add_property(dev, test, "ID_FS_PUBLISHER_ID", s); } else if (streq(name, "APPLICATION_ID")) { blkid_encode_string(value, s, sizeof(s)); udev_builtin_add_property(dev, test, "ID_FS_APPLICATION_ID", s); } else if (streq(name, "BOOT_SYSTEM_ID")) { blkid_encode_string(value, s, sizeof(s)); udev_builtin_add_property(dev, test, "ID_FS_BOOT_SYSTEM_ID", s); } } 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) { int64_t offset = 0; bool noraid = false; int fd = -1; blkid_probe pr; const char *data; const char *name; int nvals; int i; size_t len; int err = 0; static const struct option options[] = { { "offset", optional_argument, NULL, 'o' }, { "noraid", no_argument, NULL, 'R' }, {} }; for (;;) { int option; option = getopt_long(argc, argv, "oR", options, NULL); if (option == -1) break; switch (option) { case 'o': offset = strtoull(optarg, NULL, 0); break; case 'R': noraid = true; break; } } pr = blkid_new_probe(); if (!pr) 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); if (noraid) blkid_probe_filter_superblocks_usage(pr, BLKID_FLTR_NOTIN, BLKID_USAGE_RAID); fd = open(udev_device_get_devnode(dev), O_RDONLY|O_CLOEXEC); if (fd < 0) { fprintf(stderr, "error: %s: %m\n", udev_device_get_devnode(dev)); goto out; } err = blkid_probe_set_device(pr, fd, offset, 0); if (err < 0) goto out; log_debug("probe %s %sraid offset=%llu\n", udev_device_get_devnode(dev), noraid ? "no" : "", (unsigned long long) offset); 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(dev, test, 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, };