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/*
* ----------------------------------------------------------------------------
* "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 *mbr, int edd)
{
if (mbr[0x1b0] == 0x66 && mbr[0x1b1] == 0xbb) {
if (edd)
mbr[0x1bb] |= 0x80; /* Packet mode on */
else
mbr[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 *mbr;
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 (!(mbr = read_block(fd, 0, d1->sector_size))) {
close (fd);
return (1);
}
dp = (struct dos_partition *)(mbr + DOSPARTOFF);
memcpy(work, dp, sizeof work);
dp = work;
free(mbr);
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 (!(mbr = read_block(fd, 0, d1->sector_size))) {
close (fd);
return (1);
}
if (d1->bootmgr) {
memcpy(mbr, d1->bootmgr, DOSPARTOFF);
Cfg_Boot_Mgr(mbr, need_edd);
}
memcpy(mbr + DOSPARTOFF, dp, sizeof *dp * NDOSPART);
mbr[512-2] = 0x55;
mbr[512-1] = 0xaa;
write_block(fd, 0, mbr, 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;
}
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