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 #if HAVE_NBTOOL_CONFIG_H
28 #include "nbtool_config.h"
29 #endif
30
31 #include <sys/cdefs.h>
32 #ifdef __FBSDID
33 __FBSDID("$FreeBSD: src/sbin/gpt/create.c,v 1.11 2005/08/31 01:47:19 marcel Exp $");
34 #endif
35 #ifdef __RCSID
36 __RCSID("$NetBSD: create.c,v 1.23 2016/09/23 19:36:50 christos Exp $");
37 #endif
38
39 #include <sys/types.h>
40 #include <sys/param.h>
41 #include <sys/stat.h>
42 #include <sys/bootblock.h>
43
44 #include <err.h>
45 #include <stddef.h>
46 #include <stdio.h>
47 #include <stdlib.h>
48 #include <string.h>
49 #include <unistd.h>
50
51 #include "map.h"
52 #include "gpt.h"
53 #include "gpt_private.h"
54
55 static int cmd_create(gpt_t, int, char *[]);
56
57 static const char *createhelp[] = {
58 "[-AfP] [-p partitions]",
59 };
60
61 struct gpt_cmd c_create = {
62 "create",
63 cmd_create,
64 createhelp, __arraycount(createhelp),
65 0,
66 };
67
68 #define usage() gpt_usage(NULL, &c_create)
69
70
71 static int
create(gpt_t gpt,u_int parts,int force,int primary_only,int active)72 create(gpt_t gpt, u_int parts, int force, int primary_only, int active)
73 {
74 off_t last = gpt_last(gpt);
75 map_t map;
76 struct mbr *mbr;
77
78 map = map_find(gpt, MAP_TYPE_MBR);
79 if (map != NULL) {
80 if (!force) {
81 gpt_warnx(gpt, "Device contains a MBR");
82 return -1;
83 }
84 /* Nuke the MBR in our internal map. */
85 map->map_type = MAP_TYPE_UNUSED;
86 }
87
88 /*
89 * Create PMBR.
90 */
91 if (map_find(gpt, MAP_TYPE_PMBR) == NULL) {
92 if (map_free(gpt, 0LL, 1LL) == 0) {
93 gpt_warnx(gpt, "No room for the PMBR");
94 return -1;
95 }
96 mbr = gpt_read(gpt, 0LL, 1);
97 if (mbr == NULL) {
98 gpt_warnx(gpt, "Error reading MBR");
99 return -1;
100 }
101 memset(mbr, 0, sizeof(*mbr));
102 mbr->mbr_sig = htole16(MBR_SIG);
103 gpt_create_pmbr_part(mbr->mbr_part, last, active);
104
105 map = map_add(gpt, 0LL, 1LL, MAP_TYPE_PMBR, mbr, 1);
106 if (gpt_write(gpt, map) == -1) {
107 gpt_warn(gpt, "Can't write PMBR");
108 return -1;
109 }
110 }
111
112 if (gpt_create(gpt, last, parts, primary_only) == -1)
113 return -1;
114
115 if (gpt_write_primary(gpt) == -1)
116 return -1;
117
118 if (!primary_only && gpt_write_backup(gpt) == -1)
119 return -1;
120
121 return 0;
122 }
123
124 static int
cmd_create(gpt_t gpt,int argc,char * argv[])125 cmd_create(gpt_t gpt, int argc, char *argv[])
126 {
127 int ch;
128 int active = 0;
129 int force = 0;
130 int primary_only = 0;
131 u_int parts = 0;
132
133 while ((ch = getopt(argc, argv, "AfPp:")) != -1) {
134 switch(ch) {
135 case 'A':
136 active = 1;
137 break;
138 case 'f':
139 force = 1;
140 break;
141 case 'P':
142 primary_only = 1;
143 break;
144 case 'p':
145 if (gpt_uint_get(gpt, &parts) == -1)
146 return -1;
147 break;
148 default:
149 return usage();
150 }
151 }
152 if (parts == 0)
153 parts = 128;
154
155 if (argc != optind)
156 return usage();
157
158 return create(gpt, parts, force, primary_only, active);
159 }
160