1  /*
       2   * Copyright (C) 2009 Karel Zak <kzak@redhat.com>
       3   *
       4   * This file may be redistributed under the terms of the
       5   * GNU Lesser General Public License.
       6   */
       7  
       8  #include <stdio.h>
       9  #include <stdlib.h>
      10  #include <sys/types.h>
      11  #include <sys/stat.h>
      12  #include <fcntl.h>
      13  #include <errno.h>
      14  
      15  #include <blkid.h>
      16  
      17  #include "c.h"
      18  
      19  int main(int argc, char *argv[])
      20  {
      21  	int rc;
      22  	char *devname;
      23  	blkid_probe pr;
      24  
      25  	if (argc < 2) {
      26  		fprintf(stderr, "usage: %s <device>  "
      27  				"-- prints superblocks details about the device\n",
      28  				program_invocation_short_name);
      29  		return EXIT_FAILURE;
      30  	}
      31  
      32  	devname = argv[1];
      33  	pr = blkid_new_probe_from_filename(devname);
      34  	if (!pr)
      35  		err(EXIT_FAILURE, "%s: failed to create a new libblkid probe",
      36  				devname);
      37  
      38  	/* enable topology probing */
      39  	blkid_probe_enable_superblocks(pr, TRUE);
      40  
      41  	/* set all flags */
      42  	blkid_probe_set_superblocks_flags(pr,
      43  			BLKID_SUBLKS_LABEL | BLKID_SUBLKS_LABELRAW |
      44  			BLKID_SUBLKS_UUID | BLKID_SUBLKS_UUIDRAW |
      45  			BLKID_SUBLKS_TYPE | BLKID_SUBLKS_SECTYPE |
      46  			BLKID_SUBLKS_USAGE | BLKID_SUBLKS_VERSION |
      47  			BLKID_SUBLKS_MAGIC | BLKID_SUBLKS_FSINFO);
      48  
      49  	rc = blkid_do_safeprobe(pr);
      50  	if (rc == -1)
      51  		errx(EXIT_FAILURE, "%s: blkid_do_safeprobe() failed", devname);
      52  	else if (rc == 1)
      53  		warnx("%s: cannot gather information about superblocks", devname);
      54  	else {
      55  		int i, nvals = blkid_probe_numof_values(pr);
      56  
      57  		for (i = 0; i < nvals; i++) {
      58  			const char *name, *data;
      59  
      60  			blkid_probe_get_value(pr, i, &name, &data, NULL);
      61  			printf("\t%s = %s\n", name, data);
      62  		}
      63  	}
      64  
      65  	blkid_free_probe(pr);
      66  	return EXIT_SUCCESS;
      67  }