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util-linux/libblkid/samples/superblocks.c

67 lines
1.5 KiB

/*
* Copyright (C) 2009 Karel Zak <kzak@redhat.com>
*
* This file may be redistributed under the terms of the
* GNU Lesser General Public License.
*/
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
#include <blkid.h>
#include "c.h"
int main(int argc, char *argv[])
{
int rc;
char *devname;
blkid_probe pr;
if (argc < 2) {
fprintf(stderr, "usage: %s <device> "
"-- prints superblocks details about the device\n",
program_invocation_short_name);
return EXIT_FAILURE;
}
devname = argv[1];
pr = blkid_new_probe_from_filename(devname);
if (!pr)
err(EXIT_FAILURE, "%s: failed to create a new libblkid probe",
devname);
/* enable topology probing */
blkid_probe_enable_superblocks(pr, TRUE);
/* set all flags */
blkid_probe_set_superblocks_flags(pr,
BLKID_SUBLKS_LABEL | BLKID_SUBLKS_LABELRAW |
BLKID_SUBLKS_UUID | BLKID_SUBLKS_UUIDRAW |
BLKID_SUBLKS_TYPE | BLKID_SUBLKS_SECTYPE |
BLKID_SUBLKS_USAGE | BLKID_SUBLKS_VERSION |
BLKID_SUBLKS_MAGIC);
rc = blkid_do_safeprobe(pr);
if (rc == -1)
errx(EXIT_FAILURE, "%s: blkid_do_safeprobe() failed", devname);
else if (rc == 1)
warnx("%s: cannot gather information about superblocks", devname);
else {
int i, nvals = blkid_probe_numof_values(pr);
for (i = 0; i < nvals; i++) {
const char *name, *data;
blkid_probe_get_value(pr, i, &name, &data, NULL);
printf("\t%s = %s\n", name, data);
}
}
blkid_free_probe(pr);
return EXIT_SUCCESS;
}