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util-linux/libblkid/samples/partitions.c

96 lines
2.2 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 i, nparts;
char *devname;
blkid_probe pr;
blkid_partlist ls;
blkid_parttable root_tab;
if (argc < 2) {
fprintf(stderr, "usage: %s <device|file> "
"-- prints partitions\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);
/* Binary interface */
ls = blkid_probe_get_partitions(pr);
if (!ls)
errx(EXIT_FAILURE, "%s: failed to read partitions\n", devname);
/*
* Print info about the primary (root) partition table
*/
root_tab = blkid_partlist_get_table(ls);
if (!root_tab)
errx(EXIT_FAILURE, "%s: does not contains any "
"known partition table\n", devname);
printf("size: %jd, sector size: %u, PT: %s, offset: %jd, id=%s\n---\n",
(intmax_t)blkid_probe_get_size(pr),
blkid_probe_get_sectorsize(pr),
blkid_parttable_get_type(root_tab),
(intmax_t)blkid_parttable_get_offset(root_tab),
blkid_parttable_get_id(root_tab));
/*
* List partitions
*/
nparts = blkid_partlist_numof_partitions(ls);
if (!nparts)
goto done;
for (i = 0; i < nparts; i++) {
const char *p;
blkid_partition par = blkid_partlist_get_partition(ls, i);
blkid_parttable tab = blkid_partition_get_table(par);
printf("#%d: %10llu %10llu 0x%x",
blkid_partition_get_partno(par),
(unsigned long long) blkid_partition_get_start(par),
(unsigned long long) blkid_partition_get_size(par),
blkid_partition_get_type(par));
if (root_tab != tab)
/* subpartition (BSD, Minix, ...) */
printf(" (%s)", blkid_parttable_get_type(tab));
p = blkid_partition_get_name(par);
if (p)
printf(" name='%s'", p);
p = blkid_partition_get_uuid(par);
if (p)
printf(" uuid='%s'", p);
p = blkid_partition_get_type_string(par);
if (p)
printf(" type='%s'", p);
putc('\n', stdout);
}
done:
blkid_free_probe(pr);
return EXIT_SUCCESS;
}