set.c revision 1.5 
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/add.c,v 1.14 2006/06/22 22:05:28 marcel Exp $");
34#endif
35#ifdef __RCSID
36__RCSID("$NetBSD: set.c,v 1.5 2014/09/30 18:00:00 christos Exp $");
37#endif
38
39#include <sys/types.h>
40
41#include <err.h>
42#include <stddef.h>
43#include <stdio.h>
44#include <stdlib.h>
45#include <string.h>
46#include <unistd.h>
47
48#include "map.h"
49#include "gpt.h"
50
51static unsigned int entry;
52static uint64_t attributes;
53
54const char setmsg[] = "set -a attribute -i index device ...";
55
56__dead static void
57usage_set(void)
58{
59
60	fprintf(stderr,
61	    "usage: %s %s\n", getprogname(), setmsg);
62	exit(1);
63}
64
65static void
66set(int fd)
67{
68	map_t *gpt, *tpg;
69	map_t *tbl, *lbt;
70	struct gpt_hdr *hdr;
71	struct gpt_ent *ent;
72	unsigned int i;
73
74
75	gpt = map_find(MAP_TYPE_PRI_GPT_HDR);
76	ent = NULL;
77	if (gpt == NULL) {
78		warnx("%s: error: no primary GPT header; run create or recover",
79		    device_name);
80		return;
81	}
82
83	tpg = map_find(MAP_TYPE_SEC_GPT_HDR);
84	if (tpg == NULL) {
85		warnx("%s: error: no secondary GPT header; run recover",
86		    device_name);
87		return;
88	}
89
90	tbl = map_find(MAP_TYPE_PRI_GPT_TBL);
91	lbt = map_find(MAP_TYPE_SEC_GPT_TBL);
92	if (tbl == NULL || lbt == NULL) {
93		warnx("%s: error: run recover -- trust me", device_name);
94		return;
95	}
96
97	hdr = gpt->map_data;
98	if (entry > le32toh(hdr->hdr_entries)) {
99		warnx("%s: error: index %u out of range (%u max)", device_name,
100		    entry, le32toh(hdr->hdr_entries));
101		return;
102	}
103
104	i = entry - 1;
105	ent = (void*)((char*)tbl->map_data + i *
106	    le32toh(hdr->hdr_entsz));
107	if (gpt_uuid_is_nil(ent->ent_type)) {
108		warnx("%s: error: entry at index %u is unused",
109		    device_name, entry);
110		return;
111	}
112
113	ent->ent_attr |= attributes;
114
115	hdr->hdr_crc_table = htole32(crc32(tbl->map_data,
116	    le32toh(hdr->hdr_entries) * le32toh(hdr->hdr_entsz)));
117	hdr->hdr_crc_self = 0;
118	hdr->hdr_crc_self = htole32(crc32(hdr, le32toh(hdr->hdr_size)));
119
120	gpt_write(fd, gpt);
121	gpt_write(fd, tbl);
122
123	hdr = tpg->map_data;
124	ent = (void*)((char*)lbt->map_data + i * le32toh(hdr->hdr_entsz));
125	ent->ent_attr |= attributes;
126
127	hdr->hdr_crc_table = htole32(crc32(lbt->map_data,
128	    le32toh(hdr->hdr_entries) * le32toh(hdr->hdr_entsz)));
129	hdr->hdr_crc_self = 0;
130	hdr->hdr_crc_self = htole32(crc32(hdr, le32toh(hdr->hdr_size)));
131
132	gpt_write(fd, lbt);
133	gpt_write(fd, tpg);
134
135	printf("Partition %d attributes updated\n", entry);
136}
137
138int
139cmd_set(int argc, char *argv[])
140{
141	char *p;
142	int ch, fd;
143
144	while ((ch = getopt(argc, argv, "a:i:")) != -1) {
145		switch(ch) {
146		case 'a':
147			if (strcmp(optarg, "biosboot") == 0)
148				attributes |= GPT_ENT_ATTR_LEGACY_BIOS_BOOTABLE;
149			else if (strcmp(optarg, "bootme") == 0)
150				attributes |= GPT_ENT_ATTR_BOOTME;
151			else if (strcmp(optarg, "bootonce") == 0)
152				attributes |= GPT_ENT_ATTR_BOOTONCE;
153			else if (strcmp(optarg, "bootfailed") == 0)
154				attributes |= GPT_ENT_ATTR_BOOTFAILED;
155			else
156				usage_set();
157			break;
158		case 'i':
159			if (entry > 0)
160				usage_set();
161			entry = strtoul(optarg, &p, 10);
162			if (*p != 0 || entry < 1)
163				usage_set();
164			break;
165		default:
166			usage_set();
167		}
168	}
169
170	if (argc == optind)
171		usage_set();
172
173	if (entry == 0 || attributes == 0)
174		usage_set();
175
176	while (optind < argc) {
177		fd = gpt_open(argv[optind++]);
178		if (fd == -1) {
179			warn("unable to open device '%s'", device_name);
180			continue;
181		}
182
183		set(fd);
184
185		gpt_close(fd);
186	}
187
188	return 0;
189}
190