1  /*
       2   * Copyright (C) 2009 Karel Zak <kzak@redhat.com>
       3   *
       4   * This file may be redistributed under the terms of the GNU Public
       5   * License.
       6   */
       7  #include <stdio.h>
       8  #include <stdlib.h>
       9  #include <string.h>
      10  #include <errno.h>
      11  #include <getopt.h>
      12  
      13  #include <blkid.h>
      14  
      15  #include "nls.h"
      16  #include "closestream.h"
      17  #include "c.h"
      18  
      19  /* Exit codes used by findfs. */
      20  #define FINDFS_SUCCESS		0	/* no errors */
      21  #define FINDFS_NOT_FOUND	1	/* label or uuid cannot be found */
      22  #define FINDFS_USAGE_ERROR	2	/* user did something unexpected */
      23  
      24  static void __attribute__((__noreturn__)) usage(void)
      25  {
      26  	FILE *out = stdout;
      27  	fputs(USAGE_HEADER, out);
      28  	fprintf(out, _(" %s [options] {LABEL,UUID,PARTUUID,PARTLABEL}=<value>\n"),
      29  		program_invocation_short_name);
      30  
      31  	fputs(USAGE_SEPARATOR, out);
      32  	fputs(_("Find a filesystem by label or UUID.\n"), out);
      33  
      34  	fputs(USAGE_OPTIONS, out);
      35  	printf(USAGE_HELP_OPTIONS(16));
      36  	printf(USAGE_MAN_TAIL("findfs(8)"));
      37  	exit(FINDFS_SUCCESS);
      38  }
      39  
      40  int main(int argc, char **argv)
      41  {
      42  	char	*dev;
      43  	int	c;
      44  	static const struct option longopts[] = {
      45  		{"version", no_argument, NULL, 'V'},
      46  		{"help", no_argument, NULL, 'h'},
      47  		{NULL, 0, NULL, 0}
      48  	};
      49  
      50  	setlocale(LC_ALL, "");
      51  	bindtextdomain(PACKAGE, LOCALEDIR);
      52  	textdomain(PACKAGE);
      53  	close_stdout_atexit();
      54  
      55  	if (argc != 2) {
      56  		/* we return '2' for backward compatibility
      57  		 * with version from e2fsprogs */
      58  		warnx(_("bad usage"));
      59  		errtryhelp(FINDFS_USAGE_ERROR);
      60  	}
      61  
      62  	while ((c = getopt_long(argc, argv, "Vh", longopts, NULL)) != -1)
      63  		switch (c) {
      64  		case 'V':
      65  			print_version(FINDFS_SUCCESS);
      66  		case 'h':
      67  			usage();
      68  		default:
      69  			errtryhelp(FINDFS_USAGE_ERROR);
      70  		}
      71  
      72  	dev = blkid_evaluate_tag(argv[1], NULL, NULL);
      73  	if (!dev)
      74  		errx(FINDFS_NOT_FOUND, _("unable to resolve '%s'"), argv[1]);
      75  
      76  	puts(dev);
      77  	return FINDFS_SUCCESS;
      78  }
      79