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destroy.c revision 1.3 
      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