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destroy.c revision 1.2 
      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 static void
     50 usage_destroy(void)
     51 {
     52 
     53 	fprintf(stderr,
     54 	    "usage: %s [-r] device ...\n", getprogname());
     55 	exit(1);
     56 }
     57 
     58 static void
     59 destroy(int fd)
     60 {
     61 	map_t *pri_hdr, *sec_hdr;
     62 
     63 	pri_hdr = map_find(MAP_TYPE_PRI_GPT_HDR);
     64 	sec_hdr = map_find(MAP_TYPE_SEC_GPT_HDR);
     65 
     66 	if (pri_hdr == NULL && sec_hdr == NULL) {
     67 		warnx("%s: error: device doesn't contain a GPT", device_name);
     68 		return;
     69 	}
     70 
     71 	if (recoverable && sec_hdr == NULL) {
     72 		warnx("%s: error: recoverability not possible", device_name);
     73 		return;
     74 	}
     75 
     76 	if (pri_hdr != NULL) {
     77 		bzero(pri_hdr->map_data, secsz);
     78 		gpt_write(fd, pri_hdr);
     79 	}
     80 
     81 	if (!recoverable && sec_hdr != NULL) {
     82 		bzero(sec_hdr->map_data, secsz);
     83 		gpt_write(fd, sec_hdr);
     84 	}
     85 }
     86 
     87 int
     88 cmd_destroy(int argc, char *argv[])
     89 {
     90 	int ch, fd;
     91 
     92 	while ((ch = getopt(argc, argv, "r")) != -1) {
     93 		switch(ch) {
     94 		case 'r':
     95 			recoverable = 1;
     96 			break;
     97 		default:
     98 			usage_destroy();
     99 		}
    100 	}
    101 
    102 	if (argc == optind)
    103 		usage_destroy();
    104 
    105 	while (optind < argc) {
    106 		fd = gpt_open(argv[optind++]);
    107 		if (fd == -1) {
    108 			warn("unable to open device '%s'", device_name);
    109 			continue;
    110 		}
    111 
    112 		destroy(fd);
    113 
    114 		gpt_close(fd);
    115 	}
    116 
    117 	return (0);
    118 }
    119