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/*
* ----------------------------------------------------------------------------
* "THE BEER-WARE LICENSE" (Revision 42):
* <phk@login.dknet.dk> 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
* ----------------------------------------------------------------------------
*
* $Id: write_disk.c,v 1.2 1995/04/30 06:09:29 phk Exp $
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include <err.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <sys/disklabel.h>
#include <sys/diskslice.h>
#include "libdisk.h"
#define DOSPTYP_EXTENDED 5
#define DOSPTYP_ONTRACK 84
#define BBSIZE 8192
#define WHERE(offset,disk) (disk->flags & DISK_ON_TRACK ? offset + 63 : offset)
int
Write_FreeBSD(int fd, struct disk *new, struct disk *old, struct chunk *c1)
{
struct disklabel *dl;
struct chunk *c2;
int i,j;
void *p;
u_char buf[BBSIZE];
for(i=0;i<BBSIZE/512;i++) {
p = read_block(fd,i + c1->offset);
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);
memset(dl,0,sizeof *dl);
printf("--> Write_FreeBSD()\n");
for(c2=c1->part;c2;c2=c2->next) {
if (c2->type == unused) continue;
if (c2->type == reserved) continue;
if (!strcmp(c2->name,"X")) continue;
j = c2->name[5] - 'a';
if (j < 0 || j >= MAXPARTITIONS || j == RAW_PART) {
warn("Weird parititon letter %c",c2->name[5]);
continue;
}
dl->d_partitions[j].p_size = c2->size;
dl->d_partitions[j].p_offset = c2->offset - c1->offset;
}
dl->d_bbsize = BBSIZE;
strcpy(dl->d_typename,c1->name);
dl->d_secperunit = new->chunks->size;
dl->d_secpercyl = new->real_cyl ? new->real_cyl : new->bios_cyl;
dl->d_ntracks = new->real_hd ? new->real_hd : new->bios_hd;
dl->d_nsectors = new->real_sect ? new->real_sect : new->bios_sect;
dl->d_npartitions = MAXPARTITIONS;
dl->d_type = new->name[0] == 's' ? DTYPE_SCSI : DTYPE_ESDI;
dl->d_partitions[RAW_PART].p_size = c1->size;
dl->d_partitions[RAW_PART].p_offset = 0;
dl->d_magic = DISKMAGIC;
dl->d_magic2 = DISKMAGIC;
dl->d_checksum = dkcksum(dl);
for(i=0;i<BBSIZE/512;i++) {
write_block(fd,WHERE(i + c1->offset,new),buf+512*i);
}
return 0;
}
int
Write_Extended(int fd, struct disk *new, struct disk *old, struct chunk *c1)
{
printf("--> Write_Extended()\n");
Print_Chunk(c1);
return 0;
}
int
Write_Disk(struct disk *d1)
{
int fd,i,j;
struct disk *old = 0;
struct chunk *c1;
int ret = 0;
char device[64];
u_char *mbr;
struct dos_partition *dp;
int s[4];
strcpy(device,"/dev/r");
strcat(device,d1->name);
fd = open(device,O_RDWR);
if (fd < 0) {
warn("open(%s) failed",device);
return 1;
}
memset(s,0,sizeof s);
mbr = read_block(fd,0);
dp = (struct dos_partition*) (mbr + DOSPARTOFF);
for (c1=d1->chunks->part; c1 ; c1 = c1->next) {
if (c1->type == unused) continue;
if (c1->type == reserved) continue;
if (!strcmp(c1->name,"X")) continue;
if (c1->type == extended)
ret += Write_Extended(fd, d1,old,c1);
if (c1->type == freebsd)
ret += Write_FreeBSD(fd, d1,old,c1);
j = c1->name[4] - '1';
if (j < 0 || j > 3)
continue;
s[j]++;
dp[j].dp_start = c1->offset;
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;
} else {
dp[j].dp_ssect = i % d1->bios_sect;
i -= dp[j].dp_ssect;
i /= d1->bios_sect;
dp[j].dp_ssect++;
dp[j].dp_shd = i % d1->bios_hd;
i -= dp[j].dp_shd;
i /= d1->bios_hd;
dp[j].dp_scyl = i;
}
i = c1->end;
if (i >= 1024*d1->bios_sect*d1->bios_hd) {
dp[j].dp_esect = 0xff;
dp[j].dp_ehd = 0xff;
dp[j].dp_ecyl = 0xff;
} else {
dp[j].dp_esect = i % d1->bios_sect;
i -= dp[j].dp_esect;
i /= d1->bios_sect;
dp[j].dp_esect++;
dp[j].dp_ehd = i % d1->bios_hd;
i -= dp[j].dp_ehd;
i /= d1->bios_hd;
dp[j].dp_ecyl = i;
}
switch (c1->type) {
case freebsd:
dp[j].dp_typ = 0xa5;
break;
case fat:
dp[j].dp_typ = 1;
break;
case extended:
dp[j].dp_typ = 5;
break;
case foo:
dp[j].dp_typ = - c1->subtype;
break;
}
}
for(i=0;i<NDOSPART;i++)
if (!s[i])
memset(dp+i,0,sizeof *dp);
mbr[512-2] = 0x55;
mbr[512-1] = 0xaa;
write_block(fd,WHERE(0,d1),mbr);
close(fd);
return 0;
}
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