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util-linux/libblkid/samples/mkfs.c

78 lines
1.6 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;
blkid_topology tp;
if (argc < 2) {
fprintf(stderr, "usage: %s <device> "
"-- checks based on libblkid for mkfs-like programs.\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);
/*
* check Filesystems / Partitions overwrite
*/
/* enable partitions probing (superblocks are enabled by default) */
blkid_probe_enable_partitions(pr, TRUE);
rc = blkid_do_fullprobe(pr);
if (rc == -1)
errx(EXIT_FAILURE, "%s: blkid_do_fullprobe() failed", devname);
else if (rc == 0) {
const char *type;
if (!blkid_probe_lookup_value(pr, "TYPE", &type, NULL))
errx(EXIT_FAILURE, "%s: appears to contain an existing "
"%s superblock", devname, type);
if (!blkid_probe_lookup_value(pr, "PTTYPE", &type, NULL))
errx(EXIT_FAILURE, "%s: appears to contain an partition "
"table (%s)", devname, type);
}
/*
* get topology details
*/
tp = blkid_probe_get_topology(pr);
if (!tp)
errx(EXIT_FAILURE, "%s: failed to read topology", devname);
/* ... your mkfs.<type> code or so ...
off = blkid_topology_get_alignment_offset(tp);
*/
blkid_free_probe(pr);
return EXIT_SUCCESS;
}