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/* $OpenBSD: mbr.c,v 1.6 1997/10/21 22:49:33 provos Exp $ */
/*
* Copyright (c) 1997 Tobias Weingartner
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Tobias Weingartner.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <err.h>
#include <util.h>
#include <stdio.h>
#include <unistd.h>
#include <memory.h>
#include <sys/fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/disklabel.h>
#include <machine/param.h>
#include "disk.h"
#include "misc.h"
#include "mbr.h"
#include "part.h"
void
MBR_parse(mbr_buf, offset, reloff, mbr)
char *mbr_buf;
off_t offset;
off_t reloff;
mbr_t *mbr;
{
int i;
memcpy(mbr->code, mbr_buf, MBR_CODE_SIZE);
mbr->offset = offset;
mbr->reloffset = reloff;
mbr->nt_serial = getlong(&mbr_buf[MBR_NTSER_OFF]);
mbr->spare = getshort(&mbr_buf[MBR_SPARE_OFF]);
mbr->signature = getshort(&mbr_buf[MBR_SIG_OFF]);
for (i = 0; i < NDOSPART; i++)
PRT_parse(&mbr_buf[MBR_PART_OFF + MBR_PART_SIZE * i],
offset, reloff,
&mbr->part[i]);
}
void
MBR_make(mbr, mbr_buf)
mbr_t *mbr;
char *mbr_buf;
{
int i;
memcpy(mbr_buf, mbr->code, MBR_CODE_SIZE);
putlong(&mbr_buf[MBR_NTSER_OFF], mbr->nt_serial);
putshort(&mbr_buf[MBR_SPARE_OFF], mbr->spare);
putshort(&mbr_buf[MBR_SIG_OFF], mbr->signature);
for (i = 0; i < NDOSPART; i++)
PRT_make(&mbr->part[i], mbr->offset, mbr->reloffset,
&mbr_buf[MBR_PART_OFF + MBR_PART_SIZE * i]);
}
void
MBR_print(mbr)
mbr_t *mbr;
{
int i;
/* Header */
printf("Signatures: 0x%X,0x%X\n",
(int)mbr->signature, (int)mbr->nt_serial);
PRT_print(0, NULL);
/* Entries */
for (i = 0; i < NDOSPART; i++)
PRT_print(i, &mbr->part[i]);
}
int
MBR_read(fd, where, buf)
int fd;
off_t where;
char *buf;
{
off_t off;
int len;
where *= DEV_BSIZE;
off = lseek(fd, where, SEEK_SET);
if (off != where)
return (off);
len = read(fd, buf, DEV_BSIZE);
if (len != DEV_BSIZE)
return (len);
return (0);
}
int
MBR_write(fd, where, buf)
int fd;
off_t where;
char *buf;
{
off_t off;
int len;
where *= DEV_BSIZE;
off = lseek(fd, where, SEEK_SET);
if (off != where)
return (off);
len = write(fd, buf, DEV_BSIZE);
if (len != DEV_BSIZE)
return (len);
return (0);
}
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