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/* $OpenBSD: fdisk.c,v 1.74 2015/07/09 19:48:36 krw Exp $ */
/*
* Copyright (c) 1997 Tobias Weingartner
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <sys/fcntl.h>
#include <sys/disklabel.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <paths.h>
#include <stdint.h>
#include <err.h>
#include "disk.h"
#include "part.h"
#include "mbr.h"
#include "misc.h"
#include "cmd.h"
#include "user.h"
#define _PATH_MBR _PATH_BOOTDIR "mbr"
static unsigned char builtin_mbr[] = {
#include "mbrcode.h"
};
int g_flag;
int y_flag;
static void
usage(void)
{
extern char * __progname;
fprintf(stderr, "usage: %s "
"[-i|-u] [-egy] [-c # -h # -s #] [-f mbrfile] "
"[-l blocks] disk\n"
"\t-i: initialize disk with virgin MBR\n"
"\t-u: update MBR code, preserve partition table\n"
"\t-e: edit MBRs on disk interactively\n"
"\t-f: specify non-standard MBR template\n"
"\t-chs: specify disk geometry\n"
"\t-l: specify LBA block count\n"
"\t-y: do not ask questions\n"
"\t-g: initialize disk with EFI/GPT partition, requires -i\n"
"`disk' may be of the forms: sd0 or /dev/rsd0c.\n",
__progname);
exit(1);
}
int
main(int argc, char *argv[])
{
ssize_t len;
int ch, fd;
int i_flag = 0, e_flag = 0, u_flag = 0;
int c_arg = 0, h_arg = 0, s_arg = 0;
u_int32_t l_arg = 0;
char *query;
#ifdef HAS_MBR
char *mbrfile = _PATH_MBR;
#else
char *mbrfile = NULL;
#endif
struct dos_mbr dos_mbr;
while ((ch = getopt(argc, argv, "ieguf:c:h:s:l:y")) != -1) {
const char *errstr;
switch(ch) {
case 'i':
i_flag = 1;
break;
case 'u':
u_flag = 1;
break;
case 'e':
e_flag = 1;
break;
case 'f':
mbrfile = optarg;
break;
case 'c':
c_arg = strtonum(optarg, 1, 262144, &errstr);
if (errstr)
errx(1, "Cylinder argument %s [1..262144].",
errstr);
break;
case 'h':
h_arg = strtonum(optarg, 1, 256, &errstr);
if (errstr)
errx(1, "Head argument %s [1..256].", errstr);
break;
case 's':
s_arg = strtonum(optarg, 1, 63, &errstr);
if (errstr)
errx(1, "Sector argument %s [1..63].", errstr);
break;
case 'g':
g_flag = 1;
break;
case 'l':
l_arg = strtonum(optarg, 64, UINT32_MAX, &errstr);
if (errstr)
errx(1, "Block argument %s [64..%u].", errstr,
UINT32_MAX);
break;
case 'y':
y_flag = 1;
break;
default:
usage();
}
}
argc -= optind;
argv += optind;
memset(&disk, 0, sizeof(disk));
/* Argument checking */
if (argc != 1 || (i_flag && u_flag))
usage();
else
disk.name = argv[0];
if (g_flag != 0 && i_flag == 0) {
warnx("-g specified without -i");
usage();
}
/* Start with the disklabel geometry and get the sector size. */
DISK_getlabelgeometry();
if (c_arg | h_arg | s_arg) {
/* Use supplied geometry if it is completely specified. */
if (c_arg && h_arg && s_arg) {
disk.cylinders = c_arg;
disk.heads = h_arg;
disk.sectors = s_arg;
disk.size = c_arg * h_arg * s_arg;
} else
errx(1, "Please specify a full geometry with [-chs].");
} else if (l_arg) {
/* Use supplied size to calculate a geometry. */
disk.cylinders = l_arg / 64;
disk.heads = 1;
disk.sectors = 64;
disk.size = l_arg;
}
if (disk.size == 0 || disk.cylinders == 0 || disk.heads == 0 ||
disk.sectors == 0 || unit_types[SECTORS].conversion == 0)
errx(1, "Can't get disk geometry, please use [-chs] "
"to specify.");
/* Print out current MBRs on disk */
if ((i_flag + u_flag + e_flag) == 0)
USER_print_disk();
/* Create initial/default MBR. */
if (mbrfile != NULL && (fd = open(mbrfile, O_RDONLY)) == -1) {
warn("%s", mbrfile);
warnx("using builtin MBR");
mbrfile = NULL;
}
if (mbrfile == NULL) {
memcpy(&dos_mbr, builtin_mbr, sizeof(dos_mbr));
} else {
len = read(fd, &dos_mbr, sizeof(dos_mbr));
if (len == -1)
err(1, "Unable to read MBR from '%s'", mbrfile);
else if (len != sizeof(dos_mbr))
errx(1, "Unable to read complete MBR from '%s'",
mbrfile);
close(fd);
}
MBR_parse(&dos_mbr, 0, 0, &initial_mbr);
query = NULL;
if (i_flag) {
MBR_init(&initial_mbr);
query = "Do you wish to write new MBR and partition table?";
} else if (u_flag) {
MBR_pcopy(&initial_mbr);
query = "Do you wish to write new MBR?";
}
if (query && ask_yn(query))
Xwrite(NULL, &initial_mbr);
if (e_flag)
USER_edit(0, 0);
return (0);
}
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