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