diff options
Diffstat (limited to 'udev/udev-builtin-blkid.c')
| -rw-r--r-- | udev/udev-builtin-blkid.c | 171 |
1 files changed, 171 insertions, 0 deletions
diff --git a/udev/udev-builtin-blkid.c b/udev/udev-builtin-blkid.c new file mode 100644 index 0000000000..a787bf2f6c --- /dev/null +++ b/udev/udev-builtin-blkid.c @@ -0,0 +1,171 @@ +/* + * 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, const char *command, 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 = false, +}; |