sbin/gpt/destroy.c

   1 /*-
   2  * Copyright (c) 2002 Marcel Moolenaar
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  *
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  *
  15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  25  *
  26  * $FreeBSD: src/sbin/gpt/destroy.c,v 1.6 2005/08/31 01:47:19 marcel Exp $
  27  * $DragonFly: src/sbin/gpt/destroy.c,v 1.1 2007/06/16 22:29:27 dillon Exp $
  28  */
  29
  30 #include <sys/types.h>
  31
  32 #include <err.h>
  33 #include <stddef.h>
  34 #include <stdio.h>
  35 #include <stdlib.h>
  36 #include <string.h>
  37 #include <unistd.h>
  38
  39 #include "map.h"
  40 #include "gpt.h"
  41
  42 static int recoverable;
  43
  44 static void
  45 usage_destroy(void)
  46 {
  47
  48         fprintf(stderr,
  49             "usage: %s [-r] device ...\n", getprogname());
  50         exit(1);
  51 }
  52
  53 static void
  54 destroy(int fd)
  55 {
  56         map_t *pri_hdr, *sec_hdr;
  57
  58         pri_hdr = map_find(MAP_TYPE_PRI_GPT_HDR);
  59         sec_hdr = map_find(MAP_TYPE_SEC_GPT_HDR);
  60
  61         if (pri_hdr == NULL && sec_hdr == NULL) {
  62                 warnx("%s: error: device doesn't contain a GPT", device_name);
  63                 return;
  64         }
  65
  66         if (recoverable && sec_hdr == NULL) {
  67                 warnx("%s: error: recoverability not possible", device_name);
  68                 return;
  69         }
  70
  71         if (pri_hdr != NULL) {
  72                 bzero(pri_hdr->map_data, secsz);
  73                 gpt_write(fd, pri_hdr);
  74         }
  75
  76         if (!recoverable && sec_hdr != NULL) {
  77                 bzero(sec_hdr->map_data, secsz);
  78                 gpt_write(fd, sec_hdr);
  79         }
  80 }
  81
  82 int
  83 cmd_destroy(int argc, char *argv[])
  84 {
  85         int ch, fd;
  86
  87         while ((ch = getopt(argc, argv, "r")) != -1) {
  88                 switch(ch) {
  89                 case 'r':
  90                         recoverable = 1;
  91                         break;
  92                 default:
  93                         usage_destroy();
  94                 }
  95         }
  96
  97         if (argc == optind)
  98                 usage_destroy();
  99
 100         while (optind < argc) {
 101                 fd = gpt_open(argv[optind++]);
 102                 if (fd == -1) {
 103                         warn("unable to open device '%s'", device_name);
 104                         continue;
 105                 }
 106
 107                 destroy(fd);
 108
 109                 gpt_close(fd);
 110         }
 111
 112         return (0);
 113 }