set.c revision 1.8 
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 1.8 2015/12/01 16:32:19 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#include "gpt_private.h"
51
52static unsigned int entry;
53static uint64_t attributes;
54
55static int cmd_set(gpt_t, int, char *[]);
56
57static const char *sethelp[] = {
58    "-a attribute -i index",
59};
60
61struct gpt_cmd c_set = {
62	"set",
63	cmd_set,
64	sethelp, __arraycount(sethelp),
65	0,
66};
67
68#define usage() gpt_usage(NULL, &c_set)
69
70static int
71set(gpt_t gpt)
72{
73	struct gpt_hdr *hdr;
74	struct gpt_ent *ent;
75	unsigned int i;
76
77
78	if ((hdr = gpt_hdr(gpt)) == NULL)
79		return -1;
80
81
82	if (entry > le32toh(hdr->hdr_entries)) {
83		gpt_warnx(gpt, "Index %u out of range (%u max)",
84		    entry, le32toh(hdr->hdr_entries));
85		return -1;
86	}
87
88	i = entry - 1;
89	ent = gpt_ent_primary(gpt, i);
90	if (gpt_uuid_is_nil(ent->ent_type)) {
91		gpt_warnx(gpt, "Entry at index %u is unused", entry);
92		return -1;
93	}
94
95	ent->ent_attr |= attributes;
96
97	if (gpt_write_primary(gpt) == -1)
98		return -1;
99
100	ent = gpt_ent_backup(gpt, i);
101	ent->ent_attr |= attributes;
102
103	if (gpt_write_backup(gpt) == -1)
104		return -1;
105
106	gpt_msg(gpt, "Partition %d attributes updated", entry);
107	return 0;
108}
109
110static int
111cmd_set(gpt_t gpt, int argc, char *argv[])
112{
113	char *p;
114	int ch;
115
116	while ((ch = getopt(argc, argv, "a:i:")) != -1) {
117		switch(ch) {
118		case 'a':
119			if (strcmp(optarg, "biosboot") == 0)
120				attributes |= GPT_ENT_ATTR_LEGACY_BIOS_BOOTABLE;
121			else if (strcmp(optarg, "bootme") == 0)
122				attributes |= GPT_ENT_ATTR_BOOTME;
123			else if (strcmp(optarg, "bootonce") == 0)
124				attributes |= GPT_ENT_ATTR_BOOTONCE;
125			else if (strcmp(optarg, "bootfailed") == 0)
126				attributes |= GPT_ENT_ATTR_BOOTFAILED;
127			else
128				return usage();
129			break;
130		case 'i':
131			if (entry > 0)
132				usage();
133			entry = strtoul(optarg, &p, 10);
134			if (*p != 0 || entry < 1)
135				return usage();
136			break;
137		default:
138			return usage();
139		}
140	}
141
142	if (argc != optind)
143		return usage();
144
145	if (entry == 0 || attributes == 0)
146		return usage();
147
148	return set(gpt);
149}
150