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/*
* 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,
};
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