diff options
Diffstat (limited to 'sbin/fdisk/mbr.c')
| -rw-r--r-- | sbin/fdisk/mbr.c | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/sbin/fdisk/mbr.c b/sbin/fdisk/mbr.c new file mode 100644 index 00000000000..2830fc3b741 --- /dev/null +++ b/sbin/fdisk/mbr.c @@ -0,0 +1,137 @@ + +/* $OpenBSD: mbr.c,v 1.1 1997/09/29 22:58:16 weingart 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, mbr) + char *mbr_buf; + mbr_t *mbr; +{ + int i; + + memcpy(mbr->code, mbr_buf, MBR_CODE_SIZE); + 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], &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_buf[MBR_PART_OFF + MBR_PART_SIZE * i]); +} + +void +MBR_print(mbr) + mbr_t *mbr; +{ + int i; + + printf("NT Serial #: %d\n", (int)mbr->nt_serial); + printf("Signature #: 0x%X\n\n", (int)mbr->signature); + + /* Header */ + 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); +} + |