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 1.3 2007/12/18 21:46:46 riz 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 } 121