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
55static int cmd_create(gpt_t, int, char *[]);
56
57static const char *createhelp[] = {
58	"[-AfP] [-p partitions]",
59};
60
61struct 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
71static int
72create(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
124static int
125cmd_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