1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
|
/*
* ----------------------------------------------------------------------------
* "THE BEER-WARE LICENSE" (Revision 42):
* <phk@FreeBSD.org> wrote this file. As long as you retain this notice you
* can do whatever you want with this stuff. If we meet some day, and you think
* this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp
* ----------------------------------------------------------------------------
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/disklabel.h>
#include <sys/diskmbr.h>
#include <paths.h>
#include "libdisk.h"
/*
* XXX: A lot of hardcoded 512s probably should be foo->sector_size;
* I'm not sure which, so I leave it like it worked before. --schweikh
*/
static int
Write_FreeBSD(int fd, const struct disk *new, const struct chunk *c1)
{
struct disklabel *dl;
int i;
void *p;
u_char buf[BBSIZE];
for (i = 0; i < BBSIZE/512; i++) {
if (!(p = read_block(fd, i + c1->offset, 512)))
return (1);
memcpy(buf + 512 * i, p, 512);
free(p);
}
if (new->boot1)
memcpy(buf, new->boot1, 512);
if (new->boot2)
memcpy(buf + 512, new->boot2, BBSIZE - 512);
dl = (struct disklabel *)(buf + 512 * LABELSECTOR + LABELOFFSET);
Fill_Disklabel(dl, new, c1);
for (i = 0; i < BBSIZE / 512; i++)
write_block(fd, i + c1->offset, buf + 512 * i, 512);
return 0;
}
static void
Write_Int32(u_int32_t *p, u_int32_t v)
{
u_int8_t *bp = (u_int8_t *)p;
bp[0] = (v >> 0) & 0xff;
bp[1] = (v >> 8) & 0xff;
bp[2] = (v >> 16) & 0xff;
bp[3] = (v >> 24) & 0xff;
}
/*
* Special install-time configuration for the i386 boot0 boot manager.
*/
static void
Cfg_Boot_Mgr(u_char *mbrblk, int edd)
{
if (mbrblk[0x1b0] == 0x66 && mbrblk[0x1b1] == 0xbb) {
if (edd)
mbrblk[0x1bb] |= 0x80; /* Packet mode on */
else
mbrblk[0x1bb] &= 0x7f; /* Packet mode off */
}
}
int
Write_Disk(const struct disk *d1)
{
int fd, j;
uint i;
struct chunk *c1;
int ret = 0;
char device[64];
u_char *mbrblk;
struct dos_partition *dp,work[NDOSPART];
int s[4];
int need_edd = 0; /* Need EDD (packet interface) */
strcpy(device, _PATH_DEV);
strcat(device, d1->name);
fd = open(device, O_RDWR);
if (fd < 0)
return 1;
memset(s, 0, sizeof s);
if (!(mbrblk = read_block(fd, 0, d1->sector_size))) {
close (fd);
return (1);
}
dp = (struct dos_partition *)(mbrblk + DOSPARTOFF);
memcpy(work, dp, sizeof work);
dp = work;
free(mbrblk);
for (c1 = d1->chunks->part; c1; c1 = c1->next) {
if (c1->type == unused)
continue;
if (!strcmp(c1->name, "X"))
continue;
j = c1->name[strlen(d1->name) + 1] - '1';
if (j < 0 || j > 3)
continue;
s[j]++;
if (c1->type == freebsd)
ret += Write_FreeBSD(fd, d1, c1);
Write_Int32(&dp[j].dp_start, c1->offset);
Write_Int32(&dp[j].dp_size, c1->size);
i = c1->offset;
if (i >= 1024 * d1->bios_sect * d1->bios_hd) {
dp[j].dp_ssect = 0xff;
dp[j].dp_shd = 0xff;
dp[j].dp_scyl = 0xff;
need_edd++;
} else {
dp[j].dp_ssect = i % d1->bios_sect;
i -= dp[j].dp_ssect++;
i /= d1->bios_sect;
dp[j].dp_shd = i % d1->bios_hd;
i -= dp[j].dp_shd;
i /= d1->bios_hd;
dp[j].dp_scyl = i;
i -= dp[j].dp_scyl;
dp[j].dp_ssect |= i >> 2;
}
#ifdef DEBUG
printf("S:%lu = (%x/%x/%x)", c1->offset,
dp[j].dp_scyl, dp[j].dp_shd, dp[j].dp_ssect);
#endif
i = c1->end;
dp[j].dp_esect = i % d1->bios_sect;
i -= dp[j].dp_esect++;
i /= d1->bios_sect;
dp[j].dp_ehd = i % d1->bios_hd;
i -= dp[j].dp_ehd;
i /= d1->bios_hd;
if (i > 1023)
i = 1023;
dp[j].dp_ecyl = i;
i -= dp[j].dp_ecyl;
dp[j].dp_esect |= i >> 2;
#ifdef DEBUG
printf(" E:%lu = (%x/%x/%x)\n", c1->end,
dp[j].dp_ecyl, dp[j].dp_ehd, dp[j].dp_esect);
#endif
dp[j].dp_typ = c1->subtype;
if (c1->flags & CHUNK_ACTIVE)
dp[j].dp_flag = 0x80;
else
dp[j].dp_flag = 0;
}
j = 0;
for (i = 0; i < NDOSPART; i++) {
if (!s[i])
memset(dp + i, 0, sizeof *dp);
if (dp[i].dp_flag)
j++;
}
if (!j)
for(i = 0; i < NDOSPART; i++)
if (dp[i].dp_typ == 0xa5)
dp[i].dp_flag = 0x80;
if (!(mbrblk = read_block(fd, 0, d1->sector_size))) {
close (fd);
return (1);
}
if (d1->bootmgr) {
memcpy(mbrblk, d1->bootmgr, DOSPARTOFF);
Cfg_Boot_Mgr(mbrblk, need_edd);
}
memcpy(mbrblk + DOSPARTOFF, dp, sizeof *dp * NDOSPART);
mbrblk[512-2] = 0x55;
mbrblk[512-1] = 0xaa;
write_block(fd, 0, mbrblk, d1->sector_size);
if (d1->bootmgr && d1->bootmgr_size > d1->sector_size)
for (i = 1; i * d1->sector_size <= d1->bootmgr_size; i++)
write_block(fd, i, &d1->bootmgr[i * d1->sector_size],
d1->sector_size);
close(fd);
return 0;
}
|
