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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2008 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#include <stdio.h>
#include <sys/types.h>
#include <string.h>
#include <fcntl.h>
#include <libgen.h>
#include <stdlib.h>
#include <strings.h>
#include <unistd.h>
#include <sys/dktp/fdisk.h>
#define SECTOR_SIZE 512
static char boot_sect[SECTOR_SIZE];
static char new_mboot[SECTOR_SIZE];
static void
usage(char *progname)
{
fprintf(stderr, "Usage: %s [ -d | -n | -o | -r ] <device> [<mboot>]\n",
basename(progname));
fprintf(stderr, "\t-n Set new Solaris partition magic 0xbf\n");
fprintf(stderr, "\t-o Set old Solaris partition magic 0x82\n");
fprintf(stderr, "\t-r Replace master boot program "
"(/usr/lib/fs/ufs/mboot)\n");
exit(-1);
}
int
main(int argc, char *argv[])
{
int c, fd, i, sol_part = -1;
int setold = 0, setnew = 0, write_mboot = 0, list_hd = 0;
char *device;
struct mboot *mboot;
char *mboot_file = "/usr/lib/fs/ufs/mboot";
while ((c = getopt(argc, argv, "dnor")) != EOF) {
switch (c) {
case 'd':
list_hd = 1;
continue;
case 'n':
setnew = 1;
continue;
case 'o':
setold = 1;
continue;
case 'r':
write_mboot = 1;
continue;
default:
usage(argv[0]);
}
}
/* check arguments */
if ((setnew && setold) || argc < optind + 1) {
usage(argv[0]);
}
if (write_mboot && argc > optind + 1) {
mboot_file = strdup(argv[optind + 1]);
}
if (!mboot_file) {
usage(argv[0]);
}
fd = open(mboot_file, O_RDONLY);
if (fd == -1 || read(fd, new_mboot, SECTOR_SIZE) != SECTOR_SIZE) {
fprintf(stderr, "cannot read file %s\n", mboot_file);
if (fd == -1)
perror("open");
else
perror("read");
exit(-1);
}
close(fd);
device = strdup(argv[optind]);
if (!device) {
usage(argv[0]);
}
fd = open(device, O_RDWR);
if (fd == -1 || read(fd, boot_sect, SECTOR_SIZE) != SECTOR_SIZE) {
fprintf(stderr, "cannot read MBR on %s\n", device);
if (fd == -1)
perror("open");
else
perror("read");
exit(-1);
}
mboot = (struct mboot *)boot_sect;
for (i = 0; i < FD_NUMPART; i++) {
struct ipart *part = (struct ipart *)mboot->parts + i;
if (!list_hd) {
if (part->bootid == 128)
printf("active ");
else
printf(" ");
}
if (setnew && part->systid == 0x82) {
part->systid = 0xbf;
sol_part = i;
} else if (setold && part->systid == 0xbf) {
part->systid = 0x82;
sol_part = i;
} else if (list_hd &&
(part->systid == 0x82 || part->systid == 0xbf)) {
sol_part = i;
}
if (!list_hd)
printf("%d (0x%2x): start_sect %u, size_sect %u\n",
i + 1, part->systid, part->relsect, part->numsect);
}
if (list_hd) {
printf("(hd0,%d,a)\n", sol_part);
(void) close(fd);
return (0);
}
/* write new mboot */
if (write_mboot || sol_part != -1) {
if (write_mboot) {
/* copy over the new boot program */
bcopy((void *)new_mboot, (void *)boot_sect, BOOTSZ);
}
if ((lseek(fd, 0, SEEK_SET) < 0) ||
(write(fd, (void *)boot_sect, SECTOR_SIZE) < 0)) {
perror("failed to update MBR");
exit(-1);
}
if (sol_part != -1) {
printf("Changed solaris partition %d", sol_part + 1);
if (setnew)
printf("from 0x82 to 0xbf\n");
else
printf("from 0xbf to 0x82\n");
}
if (write_mboot) {
printf("Replaced mboot program with %s\n", mboot_file);
}
}
(void) close(fd);
return (0);
}
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