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Viewing changes to libblkid/samples/mkfs.c

  • Committer: Package Import Robot
  • Author(s): LaMont Jones
  • Date: 2011-11-03 15:38:23 UTC
  • mto: (4.5.5 sid) (1.6.4)
  • mto: This revision was merged to the branch mainline in revision 85.
  • Revision ID: package-import@ubuntu.com-20111103153823-10sx16jprzxlhkqf
Import upstream version 2.20.1

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libblkid/samples/mkfs.c
 
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/*
 
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 * Copyright (C) 2009 Karel Zak <kzak@redhat.com>
 
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 *
 
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 * This file may be redistributed under the terms of the
 
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 * GNU Lesser General Public License.
 
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 */
 
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#include <stdio.h>
 
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#include <stdlib.h>
 
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#include <sys/types.h>
 
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#include <sys/stat.h>
 
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#include <fcntl.h>
 
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#include <errno.h>
 
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#include <blkid.h>
 
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#include "c.h"
 
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int main(int argc, char *argv[])
 
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{
 
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        int rc;
 
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        char *devname;
 
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        blkid_probe pr;
 
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        blkid_topology tp;
 
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        if (argc < 2) {
 
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                fprintf(stderr, "usage: %s <device>  "
 
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                        "-- checks based on libblkid for mkfs-like programs.\n",
 
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                        program_invocation_short_name);
 
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                return EXIT_FAILURE;
 
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        }
 
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        devname = argv[1];
 
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        pr = blkid_new_probe_from_filename(devname);
 
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        if (!pr)
 
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                err(EXIT_FAILURE, "%s: faild to create a new libblkid probe",
 
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                                devname);
 
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        /*
 
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         * check Filesystems / Partitions overwrite
 
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         */
 
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        /* enable partitions probing (superblocks are enabled by default) */
 
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        blkid_probe_enable_partitions(pr, TRUE);
 
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        rc = blkid_do_fullprobe(pr);
 
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        if (rc == -1)
 
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                errx(EXIT_FAILURE, "%s: blkid_do_fullprobe() failed", devname);
 
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        else if (rc == 0) {
 
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                const char *type;
 
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                if (!blkid_probe_lookup_value(pr, "TYPE", &type, NULL))
 
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                        errx(EXIT_FAILURE, "%s: appears to contain an existing "
 
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                                        "%s superblock", devname, type);
 
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                if (!blkid_probe_lookup_value(pr, "PTTYPE", &type, NULL))
 
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                        errx(EXIT_FAILURE, "%s: appears to contain an partition "
 
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                                        "table (%s)", devname, type);
 
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        }
 
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        /*
 
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         * get topology details
 
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         */
 
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        tp = blkid_probe_get_topology(pr);
 
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        if (!tp)
 
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                errx(EXIT_FAILURE, "%s: failed to read topology", devname);
 
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        /* ... your mkfs.<type> code or so ...
 
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        off = blkid_topology_get_alignment_offset(tp);
 
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         */
 
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        blkid_free_probe(pr);
 
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        return EXIT_SUCCESS;
 
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}