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
  27 #include <sys/cdefs.h>
  28 #ifdef __FBSDID
  29 __FBSDID("$FreeBSD: src/sbin/gpt/destroy.c,v 1.6 2005/08/31 01:47:19 marcel Exp $");
  30 #endif
  31 #ifdef __RCSID
  32 __RCSID("$NetBSD: destroy.c,v 1.2 2006/10/15 22:36:29 christos Exp $");
  33 #endif
  34
  35 #include <sys/types.h>
  36
  37 #include <err.h>
  38 #include <stddef.h>
  39 #include <stdio.h>
  40 #include <stdlib.h>
  41 #include <string.h>
  42 #include <unistd.h>
  43
  44 #include "map.h"
  45 #include "gpt.h"
  46
  47 static int recoverable;
  48
  49 const char destroymsg[] = "destroy [-r] device ...";
  50
  51 static void
  52 usage_destroy(void)
  53 {
  54
  55         fprintf(stderr,
  56             "usage: %s %s\n", getprogname(), destroymsg);
  57         exit(1);
  58 }
  59
  60 static void
  61 destroy(int fd)
  62 {
  63         map_t *pri_hdr, *sec_hdr;
  64
  65         pri_hdr = map_find(MAP_TYPE_PRI_GPT_HDR);
  66         sec_hdr = map_find(MAP_TYPE_SEC_GPT_HDR);
  67
  68         if (pri_hdr == NULL && sec_hdr == NULL) {
  69                 warnx("%s: error: device doesn't contain a GPT", device_name);
  70                 return;
  71         }
  72
  73         if (recoverable && sec_hdr == NULL) {
  74                 warnx("%s: error: recoverability not possible", device_name);
  75                 return;
  76         }
  77
  78         if (pri_hdr != NULL) {
  79                 bzero(pri_hdr->map_data, secsz);
  80                 gpt_write(fd, pri_hdr);
  81         }
  82
  83         if (!recoverable && sec_hdr != NULL) {
  84                 bzero(sec_hdr->map_data, secsz);
  85                 gpt_write(fd, sec_hdr);
  86         }
  87 }
  88
  89 int
  90 cmd_destroy(int argc, char *argv[])
  91 {
  92         int ch, fd;
  93
  94         while ((ch = getopt(argc, argv, "r")) != -1) {
  95                 switch(ch) {
  96                 case 'r':
  97                         recoverable = 1;
  98                         break;
  99                 default:
 100                         usage_destroy();
 101                 }
 102         }
 103
 104         if (argc == optind)
 105                 usage_destroy();
 106
 107         while (optind < argc) {
 108                 fd = gpt_open(argv[optind++]);
 109                 if (fd == -1) {
 110                         warn("unable to open device '%s'", device_name);
 111                         continue;
 112                 }
 113
 114                 destroy(fd);
 115
 116                 gpt_close(fd);
 117         }
 118
 119         return (0);
 120 }