partedit_x86.c revision 271636 
1/*-
2 * Copyright (c) 2011 Nathan Whitehorn
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 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD: stable/10/usr.sbin/bsdinstall/partedit/partedit_x86.c 271636 2014-09-15 17:49:46Z emaste $
27 */
28
29#include <sys/types.h>
30#include <sys/sysctl.h>
31#include <string.h>
32
33#include "partedit.h"
34
35static char platform[255] = "";
36static const char *platform_sysctl = "machdep.bootmethod";
37
38const char *
39default_scheme(void) {
40	return ("GPT");
41}
42
43int
44is_scheme_bootable(const char *part_type) {
45	size_t platlen = sizeof(platform);
46	if (strlen(platform) == 0)
47		sysctlbyname(platform_sysctl, platform, &platlen, NULL, -1);
48
49	if (strcmp(part_type, "GPT") == 0)
50		return (1);
51	if (strcmp(platform, "BIOS") == 0) {
52		if (strcmp(part_type, "BSD") == 0)
53			return (1);
54		if (strcmp(part_type, "MBR") == 0)
55			return (1);
56	}
57
58	return (0);
59}
60
61size_t
62bootpart_size(const char *scheme) {
63	size_t platlen = sizeof(platform);
64	if (strlen(platform) == 0)
65		sysctlbyname(platform_sysctl, platform, &platlen, NULL, -1);
66
67	/* No partcode except for GPT */
68	if (strcmp(scheme, "GPT") != 0)
69		return (0);
70
71	if (strcmp(platform, "BIOS") == 0)
72		return (64*1024);
73	else
74		return (800*1024);
75
76	return (0);
77}
78
79const char *
80bootpart_type(const char *scheme) {
81	size_t platlen = sizeof(platform);
82	if (strlen(platform) == 0)
83		sysctlbyname(platform_sysctl, platform, &platlen, NULL, -1);
84
85	if (strcmp(platform, "UEFI") == 0)
86		return ("efi");
87
88	return ("freebsd-boot");
89}
90
91const char *
92bootcode_path(const char *part_type) {
93	size_t platlen = sizeof(platform);
94	if (strlen(platform) == 0)
95		sysctlbyname(platform_sysctl, platform, &platlen, NULL, -1);
96	if (strcmp(platform, "UEFI") == 0)
97		return (NULL);
98
99	if (strcmp(part_type, "GPT") == 0)
100		return ("/boot/pmbr");
101	if (strcmp(part_type, "MBR") == 0)
102		return ("/boot/mbr");
103	if (strcmp(part_type, "BSD") == 0)
104		return ("/boot/boot");
105
106	return (NULL);
107}
108
109const char *
110partcode_path(const char *part_type) {
111	size_t platlen = sizeof(platform);
112	if (strlen(platform) == 0)
113		sysctlbyname(platform_sysctl, platform, &platlen, NULL, -1);
114
115	if (strcmp(part_type, "GPT") == 0) {
116		if (strcmp(platform, "UEFI") == 0)
117			return ("/boot/boot1.efifat");
118		else
119			return ("/boot/gptboot");
120	}
121
122	/* No partcode except for GPT */
123	return (NULL);
124}
125
126