985 lines
25 KiB
C
985 lines
25 KiB
C
/* $NetBSD: fdisk.c,v 1.16 1997/09/05 21:27:00 phil Exp $ */
|
||
|
||
/*
|
||
* Mach Operating System
|
||
* Copyright (c) 1992 Carnegie Mellon University
|
||
* All Rights Reserved.
|
||
*
|
||
* Permission to use, copy, modify and distribute this software and its
|
||
* documentation is hereby granted, provided that both the copyright
|
||
* notice and this permission notice appear in all copies of the
|
||
* software, derivative works or modified versions, and any portions
|
||
* thereof, and that both notices appear in supporting documentation.
|
||
*
|
||
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
|
||
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
|
||
* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
|
||
*
|
||
* Carnegie Mellon requests users of this software to return to
|
||
*
|
||
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
|
||
* School of Computer Science
|
||
* Carnegie Mellon University
|
||
* Pittsburgh PA 15213-3890
|
||
*
|
||
* any improvements or extensions that they make and grant Carnegie Mellon
|
||
* the rights to redistribute these changes.
|
||
*/
|
||
|
||
#include <sys/cdefs.h>
|
||
|
||
#ifndef lint
|
||
__RCSID("$NetBSD: fdisk.c,v 1.16 1997/09/05 21:27:00 phil Exp $");
|
||
#endif /* not lint */
|
||
|
||
#include <sys/types.h>
|
||
#include <sys/disklabel.h>
|
||
#include <sys/ioctl.h>
|
||
#include <sys/stat.h>
|
||
|
||
#include <ctype.h>
|
||
#include <err.h>
|
||
#include <fcntl.h>
|
||
#include <stdio.h>
|
||
#include <stdlib.h>
|
||
#include <string.h>
|
||
#include <unistd.h>
|
||
|
||
#define LBUF 100
|
||
static char lbuf[LBUF];
|
||
|
||
/*
|
||
* 14-Dec-89 Robert Baron (rvb) at Carnegie-Mellon University
|
||
* Copyright (c) 1989 Robert. V. Baron
|
||
* Created.
|
||
*/
|
||
|
||
char *disk = "/dev/rwd0d";
|
||
|
||
struct disklabel disklabel; /* disk parameters */
|
||
|
||
int cylinders, sectors, heads, cylindersectors, disksectors;
|
||
|
||
struct mboot {
|
||
unsigned char padding[2]; /* force the longs to be long alligned */
|
||
unsigned char bootinst[DOSPARTOFF];
|
||
struct dos_partition parts[4];
|
||
unsigned short int signature;
|
||
};
|
||
struct mboot mboot;
|
||
|
||
#define ACTIVE 0x80
|
||
#define BOOT_MAGIC 0xAA55
|
||
|
||
int dos_cylinders;
|
||
int dos_heads;
|
||
int dos_sectors;
|
||
int dos_cylindersectors;
|
||
|
||
#define DOSSECT(s,c) (((s) & 0x3f) | (((c) >> 2) & 0xc0))
|
||
#define DOSCYL(c) ((c) & 0xff)
|
||
int partition = -1;
|
||
|
||
int a_flag; /* set active partition */
|
||
int i_flag; /* replace partition data */
|
||
int u_flag; /* update partition data */
|
||
int sh_flag; /* Output data as shell defines */
|
||
int f_flag; /* force --not interactive */
|
||
int s_flag; /* set id,offset,size */
|
||
int b_flag; /* Set cyl, heads, secs (as c/h/s) */
|
||
int b_cyl, b_head, b_sec; /* b_flag values. */
|
||
|
||
unsigned char bootcode[] = {
|
||
0x33, 0xc0, 0xfa, 0x8e, 0xd0, 0xbc, 0x00, 0x7c, 0x8e, 0xc0, 0x8e, 0xd8, 0xfb, 0x8b, 0xf4, 0xbf,
|
||
0x00, 0x06, 0xb9, 0x00, 0x02, 0xfc, 0xf3, 0xa4, 0xea, 0x1d, 0x06, 0x00, 0x00, 0xb0, 0x04, 0xbe,
|
||
0xbe, 0x07, 0x80, 0x3c, 0x80, 0x74, 0x0c, 0x83, 0xc6, 0x10, 0xfe, 0xc8, 0x75, 0xf4, 0xbe, 0xbd,
|
||
0x06, 0xeb, 0x43, 0x8b, 0xfe, 0x8b, 0x14, 0x8b, 0x4c, 0x02, 0x83, 0xc6, 0x10, 0xfe, 0xc8, 0x74,
|
||
0x0a, 0x80, 0x3c, 0x80, 0x75, 0xf4, 0xbe, 0xbd, 0x06, 0xeb, 0x2b, 0xbd, 0x05, 0x00, 0xbb, 0x00,
|
||
0x7c, 0xb8, 0x01, 0x02, 0xcd, 0x13, 0x73, 0x0c, 0x33, 0xc0, 0xcd, 0x13, 0x4d, 0x75, 0xef, 0xbe,
|
||
0x9e, 0x06, 0xeb, 0x12, 0x81, 0x3e, 0xfe, 0x7d, 0x55, 0xaa, 0x75, 0x07, 0x8b, 0xf7, 0xea, 0x00,
|
||
0x7c, 0x00, 0x00, 0xbe, 0x85, 0x06, 0x2e, 0xac, 0x0a, 0xc0, 0x74, 0x06, 0xb4, 0x0e, 0xcd, 0x10,
|
||
0xeb, 0xf4, 0xfb, 0xeb, 0xfe,
|
||
'M', 'i', 's', 's', 'i', 'n', 'g', ' ',
|
||
'o', 'p', 'e', 'r', 'a', 't', 'i', 'n', 'g', ' ', 's', 'y', 's', 't', 'e', 'm', 0,
|
||
'E', 'r', 'r', 'o', 'r', ' ', 'l', 'o', 'a', 'd', 'i', 'n', 'g', ' ',
|
||
'o', 'p', 'e', 'r', 'a', 't', 'i', 'n', 'g', ' ', 's', 'y', 's', 't', 'e', 'm', 0,
|
||
'I', 'n', 'v', 'a', 'l', 'i', 'd', ' ',
|
||
'p', 'a', 'r', 't', 'i', 't', 'i', 'o', 'n', ' ', 't', 'a', 'b', 'l', 'e', 0,
|
||
'A', 'u', 't', 'h', 'o', 'r', ' ', '-', ' ',
|
||
'S', 'i', 'e', 'g', 'm', 'a', 'r', ' ', 'S', 'c', 'h', 'm', 'i', 'd', 't', 0,0,0,
|
||
|
||
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
||
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
||
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
||
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
||
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
||
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
||
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
||
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
||
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
||
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
||
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
||
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
||
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
|
||
};
|
||
|
||
struct part_type {
|
||
int type;
|
||
char *name;
|
||
} part_types[] = {
|
||
{0x00, "unused"},
|
||
{0x01, "Primary DOS with 12 bit FAT"},
|
||
{0x02, "XENIX / filesystem"},
|
||
{0x03, "XENIX /usr filesystem"},
|
||
{0x04, "Primary DOS with 16 bit FAT <32M"},
|
||
{0x05, "Extended DOS"},
|
||
{0x06, "Primary 'big' DOS, 16-bit FAT (> 32MB)"},
|
||
{0x07, "OS/2 HPFS or NTFS or QNX2 or Advanced UNIX"},
|
||
{0x08, "AIX filesystem"},
|
||
{0x09, "AIX boot partition or Coherent"},
|
||
{0x0A, "OS/2 Boot Manager or Coherent swap or OPUS"},
|
||
{0x0E, "DOS (16-bit FAT), CHS-mapped"},
|
||
{0x0F, "Ext. partition, CHS-mapped"},
|
||
{0x10, "OPUS"},
|
||
{0x11, "OS/2 BM: hidden DOS 12-bit FAT"},
|
||
{0x12, "Compaq diagnostics"},
|
||
{0x14, "OS/2 BM: hidden DOS 16-bit FAT <32M"},
|
||
{0x16, "OS/2 BM: hidden DOS 16-bit FAT >=32M"},
|
||
{0x17, "OS/2 BM: hidden IFS"},
|
||
{0x18, "AST Windows swapfile"},
|
||
{0x24, "NEC DOS"},
|
||
{0x3C, "PartitionMagic recovery"},
|
||
{0x40, "VENIX 286"},
|
||
{0x41, "Linux/MINIX (sharing disk with DRDOS)"},
|
||
{0x42, "SFS or Linux swap (sharing disk with DRDOS)"},
|
||
{0x43, "Linux native (sharing disk with DRDOS)"},
|
||
{0x50, "DM (disk manager)"},
|
||
{0x51, "DM6 Aux1 (or Novell)"},
|
||
{0x52, "CP/M or Microport SysV/AT"},
|
||
{0x53, "DM6 Aux3"},
|
||
{0x54, "DM6"},
|
||
{0x55, "EZ-Drive (disk manager)"},
|
||
{0x56, "Golden Bow (disk manager)"},
|
||
{0x5C, "Priam Edisk (disk manager)"},
|
||
{0x61, "SpeedStor"},
|
||
{0x63, "GNU HURD or Mach or Sys V/386 (such as ISC UNIX)"},
|
||
{0x64, "Novell Netware 2.xx"},
|
||
{0x65, "Novell Netware 3.xx"},
|
||
{0x70, "DiskSecure Multi-Boot"},
|
||
{0x75, "PC/IX"},
|
||
{0x77, "QNX4.x"},
|
||
{0x78, "QNX4.x 2nd part"},
|
||
{0x79, "QNX4.x 3rd part"},
|
||
{0x80, "MINIX until 1.4a"},
|
||
{0x81, "MINIX since 1.4b, early Linux, Mitac dmgr"},
|
||
{0x82, "Linux swap"},
|
||
{0x83, "Linux native"},
|
||
{0x84, "OS/2 hidden C: drive"},
|
||
{0x85, "Linux extended"},
|
||
{0x86, "NTFS volume set??"},
|
||
{0x87, "NTFS volume set??"},
|
||
{0x93, "Amoeba filesystem"},
|
||
{0x94, "Amoeba bad block table"},
|
||
{0xA0, "IBM Thinkpad hibernation"},
|
||
{0xA5, "NetBSD or FreeBSD or 386BSD"},
|
||
{0xA6, "OpenBSD"},
|
||
{0xA7, "NeXTSTEP 486"},
|
||
{0xB7, "BSDI BSD/386 filesystem"},
|
||
{0xB8, "BSDI BSD/386 swap"},
|
||
{0xC1, "DRDOS/sec (FAT-12)"},
|
||
{0xC4, "DRDOS/sec (FAT-16, < 32M)"},
|
||
{0xC6, "DRDOS/sec (FAT-16, >= 32M)"},
|
||
{0xC7, "Syrinx"},
|
||
{0xDB, "CP/M or Concurrent CP/M or Concurrent DOS or CTOS"},
|
||
{0xE1, "DOS access or SpeedStor 12-bit FAT extended partition"},
|
||
{0xE3, "DOS R/O or SpeedStor"},
|
||
{0xE4, "SpeedStor 16-bit FAT extended partition < 1024 cyl."},
|
||
{0xF1, "SpeedStor"},
|
||
{0xF2, "DOS 3.3+ Secondary"},
|
||
{0xF4, "SpeedStor large partition"},
|
||
{0xFE, "SpeedStor >1024 cyl. or LANstep"},
|
||
{0xFF, "Xenix Bad Block Table"},
|
||
};
|
||
|
||
void usage __P((void));
|
||
void print_s0 __P((int));
|
||
void print_part __P((int));
|
||
void init_sector0 __P((int));
|
||
void intuit_translated_geometry __P((void));
|
||
int try_heads __P((quad_t, quad_t, quad_t, quad_t, quad_t, quad_t, quad_t,
|
||
quad_t));
|
||
int try_sectors __P((quad_t, quad_t, quad_t, quad_t, quad_t));
|
||
void change_part __P((int, int, int, int));
|
||
void print_params __P((void));
|
||
void change_active __P((int));
|
||
void get_params_to_use __P((void));
|
||
void dos __P((int, unsigned char *, unsigned char *, unsigned char *));
|
||
int open_disk __P((int));
|
||
int read_disk __P((int, void *));
|
||
int write_disk __P((int, void *));
|
||
int get_params __P((void));
|
||
int read_s0 __P((void));
|
||
int write_s0 __P((void));
|
||
int yesno __P((char *));
|
||
void decimal __P((char *, int *));
|
||
int type_match __P((const void *, const void *));
|
||
char *get_type __P((int));
|
||
int get_mapping __P((int, int *, int *, int *, long *));
|
||
|
||
static inline unsigned short getshort __P((void *));
|
||
static inline void putshort __P((void *p, unsigned short));
|
||
static inline unsigned long getlong __P((void *));
|
||
static inline void putlong __P((void *, unsigned long));
|
||
|
||
|
||
int main __P((int, char **));
|
||
|
||
int
|
||
main(argc, argv)
|
||
int argc;
|
||
char *argv[];
|
||
{
|
||
int ch;
|
||
int part;
|
||
|
||
int csysid, cstart, csize; /* For the b_flag. */
|
||
|
||
a_flag = i_flag = u_flag = sh_flag = f_flag = s_flag = b_flag = 0;
|
||
csysid = cstart = csize = 0;
|
||
while ((ch = getopt(argc, argv, "0123Safius:b:")) != -1)
|
||
switch (ch) {
|
||
case '0':
|
||
partition = 0;
|
||
break;
|
||
case '1':
|
||
partition = 1;
|
||
break;
|
||
case '2':
|
||
partition = 2;
|
||
break;
|
||
case '3':
|
||
partition = 3;
|
||
break;
|
||
case 'S':
|
||
sh_flag = 1;
|
||
break;
|
||
case 'a':
|
||
a_flag = 1;
|
||
break;
|
||
case 'f':
|
||
f_flag = 1;
|
||
break;
|
||
case 'i':
|
||
i_flag = 1;
|
||
break;
|
||
case 'u':
|
||
u_flag = 1;
|
||
break;
|
||
case 's':
|
||
s_flag = 1;
|
||
if (sscanf (optarg, "%d/%d/%d",
|
||
&csysid, &cstart, &csize) != 3) {
|
||
(void)fprintf (stderr, "%s: Bad argument "
|
||
"to the -s flag.\n",
|
||
argv[0]);
|
||
exit (1);
|
||
}
|
||
break;
|
||
case 'b':
|
||
b_flag = 1;
|
||
if (sscanf (optarg, "%d/%d/%d",
|
||
&b_cyl, &b_head, &b_sec) != 3) {
|
||
(void)fprintf (stderr, "%s: Bad argument "
|
||
"to the -b flag.\n",
|
||
argv[0]);
|
||
exit (1);
|
||
}
|
||
break;
|
||
default:
|
||
usage();
|
||
}
|
||
argc -= optind;
|
||
argv += optind;
|
||
|
||
if (sh_flag && (a_flag || i_flag || u_flag || f_flag || s_flag))
|
||
usage();
|
||
|
||
if (partition == -1 && s_flag) {
|
||
(void) fprintf (stderr,
|
||
"-s flag requires a partition selected.\n");
|
||
usage();
|
||
}
|
||
|
||
if (argc > 0)
|
||
disk = argv[0];
|
||
|
||
if (open_disk(a_flag || i_flag || u_flag) < 0)
|
||
exit(1);
|
||
|
||
if (read_s0())
|
||
init_sector0(sectors > 63 ? 63 : sectors);
|
||
|
||
intuit_translated_geometry();
|
||
|
||
if (!sh_flag)
|
||
printf("******* Working on device %s *******\n", disk);
|
||
|
||
|
||
if ((i_flag || u_flag) && (!f_flag || b_flag))
|
||
get_params_to_use();
|
||
|
||
if (i_flag)
|
||
init_sector0(dos_sectors > 63 ? 63 : dos_sectors);
|
||
|
||
if (!sh_flag)
|
||
printf("Warning: BIOS sector numbering starts with sector 1\n");
|
||
|
||
/* Do the update stuff! */
|
||
if (u_flag) {
|
||
if (!f_flag)
|
||
printf("Information from DOS bootblock is:\n");
|
||
if (partition == -1)
|
||
for (part = 0; part < NDOSPART; part++)
|
||
change_part(part,-1, -1, -1);
|
||
else
|
||
change_part(partition, csysid, cstart, csize);
|
||
} else
|
||
if (!i_flag)
|
||
print_s0(partition);
|
||
|
||
if (a_flag)
|
||
change_active(partition);
|
||
|
||
if (u_flag || a_flag || i_flag) {
|
||
if (!f_flag) {
|
||
printf("\nWe haven't changed the partition table "
|
||
"yet. This is your last chance.\n");
|
||
print_s0(-1);
|
||
if (yesno("Should we write new partition table?"))
|
||
write_s0();
|
||
} else
|
||
write_s0();
|
||
}
|
||
|
||
exit(0);
|
||
}
|
||
|
||
void
|
||
usage()
|
||
{
|
||
(void)fprintf(stderr, "usage: fdisk [-aiufS] [-0|-1|-2|-3] "
|
||
"[device]\n");
|
||
exit(1);
|
||
}
|
||
|
||
void
|
||
print_s0(which)
|
||
int which;
|
||
{
|
||
int part;
|
||
|
||
print_params();
|
||
if (!sh_flag)
|
||
printf("Information from DOS bootblock is:\n");
|
||
if (which == -1) {
|
||
for (part = 0; part < NDOSPART; part++) {
|
||
if (!sh_flag)
|
||
printf("%d: ", part);
|
||
print_part(part);
|
||
}
|
||
} else
|
||
print_part(which);
|
||
}
|
||
|
||
static struct dos_partition mtpart = { 0 };
|
||
|
||
static inline unsigned short
|
||
getshort(p)
|
||
void *p;
|
||
{
|
||
unsigned char *cp = p;
|
||
|
||
return cp[0] | (cp[1] << 8);
|
||
}
|
||
|
||
static inline void
|
||
putshort(p, l)
|
||
void *p;
|
||
unsigned short l;
|
||
{
|
||
unsigned char *cp = p;
|
||
|
||
*cp++ = l;
|
||
*cp++ = l >> 8;
|
||
}
|
||
|
||
static inline unsigned long
|
||
getlong(p)
|
||
void *p;
|
||
{
|
||
unsigned char *cp = p;
|
||
|
||
return cp[0] | (cp[1] << 8) | (cp[2] << 16) | (cp[3] << 24);
|
||
}
|
||
|
||
static inline void
|
||
putlong(p, l)
|
||
void *p;
|
||
unsigned long l;
|
||
{
|
||
unsigned char *cp = p;
|
||
|
||
*cp++ = l;
|
||
*cp++ = l >> 8;
|
||
*cp++ = l >> 16;
|
||
*cp++ = l >> 24;
|
||
}
|
||
|
||
void
|
||
print_part(part)
|
||
int part;
|
||
{
|
||
struct dos_partition *partp;
|
||
int empty;
|
||
|
||
partp = &mboot.parts[part];
|
||
empty = !memcmp(partp, &mtpart, sizeof(struct dos_partition));
|
||
|
||
if (sh_flag) {
|
||
if (empty) {
|
||
printf("PART%dSIZE=0\n", part);
|
||
return;
|
||
}
|
||
|
||
printf("PART%dID=%d\n", part, partp->dp_typ);
|
||
printf("PART%dSIZE=%ld\n", part, getlong(&partp->dp_size));
|
||
printf("PART%dSTART=%ld\n", part, getlong(&partp->dp_start));
|
||
printf("PART%dFLAG=%x\n", part, partp->dp_flag);
|
||
printf("PART%dBCYL=%d\n", part, DPCYL(partp->dp_scyl,
|
||
partp->dp_ssect));
|
||
printf("PART%dBHEAD=%d\n", part, partp->dp_shd);
|
||
printf("PART%dBSEC=%d\n", part, DPSECT(partp->dp_ssect));
|
||
printf("PART%dECYL=%d\n", part, DPCYL(partp->dp_ecyl,
|
||
partp->dp_esect));
|
||
printf("PART%dEHEAD=%d\n", part, partp->dp_ehd);
|
||
printf("PART%dESEC=%d\n", part, DPSECT(partp->dp_esect));
|
||
return;
|
||
}
|
||
|
||
/* Not sh_flag. */
|
||
if (empty) {
|
||
printf("<UNUSED>\n");
|
||
return;
|
||
}
|
||
printf("sysid %d (%s)\n", partp->dp_typ, get_type(partp->dp_typ));
|
||
printf(" start %ld, size %ld (%ld MB), flag %x\n",
|
||
getlong(&partp->dp_start), getlong(&partp->dp_size),
|
||
getlong(&partp->dp_size) * 512 / (1024 * 1024), partp->dp_flag);
|
||
printf("\tbeg: cylinder %4d, head %3d, sector %2d\n",
|
||
DPCYL(partp->dp_scyl, partp->dp_ssect),
|
||
partp->dp_shd, DPSECT(partp->dp_ssect));
|
||
printf("\tend: cylinder %4d, head %3d, sector %2d\n",
|
||
DPCYL(partp->dp_ecyl, partp->dp_esect),
|
||
partp->dp_ehd, DPSECT(partp->dp_esect));
|
||
}
|
||
|
||
void
|
||
init_sector0(start)
|
||
int start;
|
||
{
|
||
int i;
|
||
struct dos_partition *partp;
|
||
|
||
int dos_disksectors = dos_cylinders * dos_heads * dos_sectors;
|
||
|
||
memcpy(mboot.bootinst, bootcode, sizeof(bootcode));
|
||
putshort(&mboot.signature, BOOT_MAGIC);
|
||
|
||
for (i=0; i<3; i++)
|
||
memset (&mboot.parts[i], 0, sizeof(struct dos_partition));
|
||
|
||
partp = &mboot.parts[3];
|
||
partp->dp_typ = DOSPTYP_386BSD;
|
||
partp->dp_flag = ACTIVE;
|
||
putlong(&partp->dp_start, start);
|
||
putlong(&partp->dp_size, dos_disksectors - start);
|
||
|
||
dos(getlong(&partp->dp_start),
|
||
&partp->dp_scyl, &partp->dp_shd, &partp->dp_ssect);
|
||
dos(getlong(&partp->dp_start) + getlong(&partp->dp_size) - 1,
|
||
&partp->dp_ecyl, &partp->dp_ehd, &partp->dp_esect);
|
||
|
||
printf ("DOS partition table initialized.\n");
|
||
}
|
||
|
||
/* Prerequisite: the disklabel parameters and master boot record must
|
||
* have been read (i.e. dos_* and mboot are meaningful).
|
||
* Specification: modifies dos_cylinders, dos_heads, dos_sectors, and
|
||
* dos_cylindersectors to be consistent with what the
|
||
* partition table is using, if we can find a geometry
|
||
* which is consistent with all partition table entries.
|
||
* We may get the number of cylinders slightly wrong (in
|
||
* the conservative direction). The idea is to be able
|
||
* to create a NetBSD partition on a disk we don't know
|
||
* the translated geometry of.
|
||
* This whole routine should be replaced with a kernel interface to get
|
||
* the BIOS geometry (which in turn requires modifications to the i386
|
||
* boot loader to pass in the BIOS geometry for each disk). */
|
||
void
|
||
intuit_translated_geometry()
|
||
{
|
||
|
||
int cylinders = -1, heads = -1, sectors = -1, i, j;
|
||
int c1, h1, s1, c2, h2, s2;
|
||
long a1, a2;
|
||
quad_t num, denom;
|
||
|
||
/* Try to deduce the number of heads from two different mappings. */
|
||
for (i = 0; i < NDOSPART * 2; i++) {
|
||
if (get_mapping(i, &c1, &h1, &s1, &a1) < 0)
|
||
continue;
|
||
for (j = 0; j < 8; j++) {
|
||
if (get_mapping(j, &c2, &h2, &s2, &a2) < 0)
|
||
continue;
|
||
num = (quad_t)h1*(a2-s2) - h2*(a1-s1);
|
||
denom = (quad_t)c2*(a1-s1) - c1*(a2-s2);
|
||
if (denom != 0 && num % denom == 0) {
|
||
heads = num / denom;
|
||
break;
|
||
}
|
||
}
|
||
if (heads != -1)
|
||
break;
|
||
}
|
||
|
||
if (heads == -1)
|
||
return;
|
||
|
||
/* Now figure out the number of sectors from a single mapping. */
|
||
for (i = 0; i < NDOSPART * 2; i++) {
|
||
if (get_mapping(i, &c1, &h1, &s1, &a1) < 0)
|
||
continue;
|
||
num = a1 - s1;
|
||
denom = c1 * heads + h1;
|
||
if (denom != 0 && num % denom == 0) {
|
||
sectors = num / denom;
|
||
break;
|
||
}
|
||
}
|
||
|
||
if (sectors == -1)
|
||
return;
|
||
|
||
/* Estimate the number of cylinders. */
|
||
cylinders = dos_cylinders * dos_cylindersectors / heads / sectors;
|
||
|
||
/* Now verify consistency with each of the partition table entries.
|
||
* Be willing to shove cylinders up a little bit to make things work,
|
||
* but translation mismatches are fatal. */
|
||
for (i = 0; i < NDOSPART * 2; i++) {
|
||
if (get_mapping(i, &c1, &h1, &s1, &a1) < 0)
|
||
continue;
|
||
if (sectors * (c1 * heads + h1) + s1 != a1)
|
||
return;
|
||
if (c1 >= cylinders)
|
||
cylinders = c1 + 1;
|
||
}
|
||
|
||
/* Everything checks out. Reset the geometry to use for further
|
||
* calculations. */
|
||
dos_cylinders = cylinders;
|
||
dos_heads = heads;
|
||
dos_sectors = sectors;
|
||
dos_cylindersectors = heads * sectors;
|
||
}
|
||
|
||
/* For the purposes of intuit_translated_geometry(), treat the partition
|
||
* table as a list of eight mapping between (cylinder, head, sector)
|
||
* triplets and absolute sectors. Get the relevant geometry triplet and
|
||
* absolute sectors for a given entry, or return -1 if it isn't present.
|
||
* Note: for simplicity, the returned sector is 0-based. */
|
||
int
|
||
get_mapping(i, cylinder, head, sector, absolute)
|
||
int i, *cylinder, *head, *sector;
|
||
long *absolute;
|
||
{
|
||
struct dos_partition *part = &mboot.parts[i / 2];
|
||
|
||
if (part->dp_typ == 0)
|
||
return -1;
|
||
if (i % 2 == 0) {
|
||
*cylinder = DPCYL(part->dp_scyl, part->dp_ssect);
|
||
*head = part->dp_shd;
|
||
*sector = DPSECT(part->dp_ssect) - 1;
|
||
*absolute = getlong(&part->dp_start);
|
||
} else {
|
||
*cylinder = DPCYL(part->dp_ecyl, part->dp_esect);
|
||
*head = part->dp_ehd;
|
||
*sector = DPSECT(part->dp_esect) - 1;
|
||
*absolute = getlong(&part->dp_start)
|
||
+ getlong(&part->dp_size) - 1;
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
void
|
||
change_part(part, csysid, cstart, csize)
|
||
int part, csysid, cstart, csize;
|
||
{
|
||
struct dos_partition *partp;
|
||
|
||
partp = &mboot.parts[part];
|
||
|
||
if (s_flag) {
|
||
partp->dp_typ = csysid;
|
||
putlong(&partp->dp_start, cstart);
|
||
putlong(&partp->dp_size, csize);
|
||
dos(getlong(&partp->dp_start),
|
||
&partp->dp_scyl, &partp->dp_shd, &partp->dp_ssect);
|
||
dos(getlong(&partp->dp_start)
|
||
+ getlong(&partp->dp_size) - 1,
|
||
&partp->dp_ecyl, &partp->dp_ehd, &partp->dp_esect);
|
||
if (f_flag)
|
||
return;
|
||
}
|
||
|
||
printf("The data for partition %d is:\n", part);
|
||
print_part(part);
|
||
if (!u_flag || !yesno("Do you want to change it?"))
|
||
return;
|
||
|
||
do {
|
||
{
|
||
int sysid, start, size;
|
||
|
||
sysid = partp->dp_typ,
|
||
start = getlong(&partp->dp_start),
|
||
size = getlong(&partp->dp_size);
|
||
decimal("sysid", &sysid);
|
||
decimal("start", &start);
|
||
decimal("size", &size);
|
||
partp->dp_typ = sysid;
|
||
putlong(&partp->dp_start, start);
|
||
putlong(&partp->dp_size, size);
|
||
}
|
||
|
||
if (yesno("Explicitly specify beg/end address?")) {
|
||
int tsector, tcylinder, thead;
|
||
|
||
tcylinder = DPCYL(partp->dp_scyl, partp->dp_ssect);
|
||
thead = partp->dp_shd;
|
||
tsector = DPSECT(partp->dp_ssect);
|
||
decimal("beginning cylinder", &tcylinder);
|
||
decimal("beginning head", &thead);
|
||
decimal("beginning sector", &tsector);
|
||
partp->dp_scyl = DOSCYL(tcylinder);
|
||
partp->dp_shd = thead;
|
||
partp->dp_ssect = DOSSECT(tsector, tcylinder);
|
||
|
||
tcylinder = DPCYL(partp->dp_ecyl, partp->dp_esect);
|
||
thead = partp->dp_ehd;
|
||
tsector = DPSECT(partp->dp_esect);
|
||
decimal("ending cylinder", &tcylinder);
|
||
decimal("ending head", &thead);
|
||
decimal("ending sector", &tsector);
|
||
partp->dp_ecyl = DOSCYL(tcylinder);
|
||
partp->dp_ehd = thead;
|
||
partp->dp_esect = DOSSECT(tsector, tcylinder);
|
||
} else {
|
||
dos(getlong(&partp->dp_start),
|
||
&partp->dp_scyl, &partp->dp_shd, &partp->dp_ssect);
|
||
dos(getlong(&partp->dp_start)
|
||
+ getlong(&partp->dp_size) - 1,
|
||
&partp->dp_ecyl, &partp->dp_ehd, &partp->dp_esect);
|
||
}
|
||
|
||
print_part(part);
|
||
} while (!yesno("Is this entry okay?"));
|
||
}
|
||
|
||
void
|
||
print_params()
|
||
{
|
||
|
||
if (sh_flag) {
|
||
printf ("DLCYL=%d\nDLHEAD=%d\nDLSEC=%d\n",
|
||
cylinders, heads, sectors);
|
||
printf ("BCYL=%d\nBHEAD=%d\nBSEC=%d\n",
|
||
dos_cylinders, dos_heads, dos_sectors);
|
||
return;
|
||
}
|
||
|
||
/* Not sh_flag */
|
||
printf("parameters extracted from in-core disklabel are:\n");
|
||
printf("cylinders=%d heads=%d sectors/track=%d (%d sectors/cylinder)\n\n",
|
||
cylinders, heads, sectors, cylindersectors);
|
||
if (dos_sectors > 63 || dos_cylinders > 1023 || dos_heads > 255)
|
||
printf("Figures below won't work with BIOS for partitions not in cylinder 1\n");
|
||
printf("parameters to be used for BIOS calculations are:\n");
|
||
printf("cylinders=%d heads=%d sectors/track=%d (%d sectors/cylinder)\n\n",
|
||
dos_cylinders, dos_heads, dos_sectors, dos_cylindersectors);
|
||
}
|
||
|
||
void
|
||
change_active(which)
|
||
int which;
|
||
{
|
||
struct dos_partition *partp;
|
||
int part;
|
||
int active = 4;
|
||
|
||
partp = &mboot.parts[0];
|
||
|
||
if (a_flag && which != -1)
|
||
active = which;
|
||
else {
|
||
for (part = 0; part < NDOSPART; part++)
|
||
if (partp[part].dp_flag & ACTIVE)
|
||
active = part;
|
||
}
|
||
if (!f_flag) {
|
||
if (yesno("Do you want to change the active partition?")) {
|
||
printf ("Choosing 4 will make no partition active.\n");
|
||
do {
|
||
decimal("active partition", &active);
|
||
} while (!yesno("Are you happy with this choice?"));
|
||
} else
|
||
return;
|
||
} else
|
||
if (active != 4)
|
||
printf ("Making partition %d active.\n", active);
|
||
|
||
for (part = 0; part < NDOSPART; part++)
|
||
partp[part].dp_flag &= ~ACTIVE;
|
||
if (active < 4)
|
||
partp[active].dp_flag |= ACTIVE;
|
||
}
|
||
|
||
void
|
||
get_params_to_use()
|
||
{
|
||
if (b_flag) {
|
||
dos_cylinders = b_cyl;
|
||
dos_heads = b_head;
|
||
dos_sectors = b_sec;
|
||
dos_cylindersectors = dos_heads * dos_sectors;
|
||
return;
|
||
}
|
||
|
||
print_params();
|
||
if (yesno("Do you want to change our idea of what BIOS thinks?")) {
|
||
do {
|
||
decimal("BIOS's idea of #cylinders", &dos_cylinders);
|
||
decimal("BIOS's idea of #heads", &dos_heads);
|
||
decimal("BIOS's idea of #sectors", &dos_sectors);
|
||
dos_cylindersectors = dos_heads * dos_sectors;
|
||
print_params();
|
||
} while (!yesno("Are you happy with this choice?"));
|
||
}
|
||
}
|
||
|
||
/***********************************************\
|
||
* Change real numbers into strange dos numbers *
|
||
\***********************************************/
|
||
void
|
||
dos(sector, cylinderp, headp, sectorp)
|
||
int sector;
|
||
unsigned char *cylinderp, *headp, *sectorp;
|
||
{
|
||
int cylinder, head;
|
||
|
||
cylinder = sector / dos_cylindersectors;
|
||
sector -= cylinder * dos_cylindersectors;
|
||
|
||
head = sector / dos_sectors;
|
||
sector -= head * dos_sectors;
|
||
|
||
*cylinderp = DOSCYL(cylinder);
|
||
*headp = head;
|
||
*sectorp = DOSSECT(sector + 1, cylinder);
|
||
}
|
||
|
||
int fd;
|
||
|
||
int
|
||
open_disk(u_flag)
|
||
int u_flag;
|
||
{
|
||
struct stat st;
|
||
|
||
if ((fd = open(disk, u_flag ? O_RDWR : O_RDONLY)) == -1) {
|
||
warn("%s", disk);
|
||
return (-1);
|
||
}
|
||
if (fstat(fd, &st) == -1) {
|
||
close(fd);
|
||
warn("%s", disk);
|
||
return (-1);
|
||
}
|
||
if (!S_ISCHR(st.st_mode) && !S_ISREG(st.st_mode)) {
|
||
close(fd);
|
||
warnx("%s is not a character device or regular file", disk);
|
||
return (-1);
|
||
}
|
||
if (get_params() == -1) {
|
||
close(fd);
|
||
return (-1);
|
||
}
|
||
return (0);
|
||
}
|
||
|
||
int
|
||
read_disk(sector, buf)
|
||
int sector;
|
||
void *buf;
|
||
{
|
||
|
||
if (lseek(fd, (off_t)(sector * 512), 0) == -1)
|
||
return (-1);
|
||
return (read(fd, buf, 512));
|
||
}
|
||
|
||
int
|
||
write_disk(sector, buf)
|
||
int sector;
|
||
void *buf;
|
||
{
|
||
|
||
if (lseek(fd, (off_t)(sector * 512), 0) == -1)
|
||
return (-1);
|
||
return (write(fd, buf, 512));
|
||
}
|
||
|
||
int
|
||
get_params()
|
||
{
|
||
|
||
if (ioctl(fd, DIOCGDINFO, &disklabel) == -1) {
|
||
warn("DIOCGDINFO");
|
||
return (-1);
|
||
}
|
||
|
||
dos_cylinders = cylinders = disklabel.d_ncylinders;
|
||
dos_heads = heads = disklabel.d_ntracks;
|
||
dos_sectors = sectors = disklabel.d_nsectors;
|
||
dos_cylindersectors = cylindersectors = heads * sectors;
|
||
disksectors = cylinders * heads * sectors;
|
||
|
||
return (0);
|
||
}
|
||
|
||
int
|
||
read_s0()
|
||
{
|
||
|
||
if (read_disk(0, mboot.bootinst) == -1) {
|
||
warn("can't read fdisk partition table");
|
||
return (-1);
|
||
}
|
||
if (getshort(&mboot.signature) != BOOT_MAGIC) {
|
||
warnx("invalid fdisk partition table found");
|
||
/* So should we initialize things? */
|
||
return (-1);
|
||
}
|
||
return (0);
|
||
}
|
||
|
||
int
|
||
write_s0()
|
||
{
|
||
int flag;
|
||
|
||
/*
|
||
* write enable label sector before write (if necessary),
|
||
* disable after writing.
|
||
* needed if the disklabel protected area also protects
|
||
* sector 0. (e.g. empty disk)
|
||
*/
|
||
flag = 1;
|
||
if (ioctl(fd, DIOCWLABEL, &flag) < 0)
|
||
warn("DIOCWLABEL");
|
||
if (write_disk(0, mboot.bootinst) == -1) {
|
||
warn("can't write fdisk partition table");
|
||
return -1;
|
||
}
|
||
flag = 0;
|
||
if (ioctl(fd, DIOCWLABEL, &flag) < 0)
|
||
warn("DIOCWLABEL");
|
||
return 0;
|
||
}
|
||
|
||
int
|
||
yesno(str)
|
||
char *str;
|
||
{
|
||
int ch, first;
|
||
|
||
printf("%s [n] ", str);
|
||
|
||
first = ch = getchar();
|
||
while (ch != '\n' && ch != EOF)
|
||
ch = getchar();
|
||
return (first == 'y' || first == 'Y');
|
||
}
|
||
|
||
void
|
||
decimal(str, num)
|
||
char *str;
|
||
int *num;
|
||
{
|
||
int acc = 0;
|
||
char *cp;
|
||
|
||
for (;; printf("%s is not a valid decimal number.\n", lbuf)) {
|
||
printf("Supply a decimal value for \"%s\" [%d] ", str, *num);
|
||
|
||
fgets(lbuf, LBUF, stdin);
|
||
lbuf[strlen(lbuf)-1] = '\0';
|
||
cp = lbuf;
|
||
|
||
cp += strspn(cp, " \t");
|
||
if (*cp == '\0')
|
||
return;
|
||
|
||
if (!isdigit(*cp))
|
||
continue;
|
||
acc = strtol(lbuf, &cp, 10);
|
||
|
||
cp += strspn(cp, " \t");
|
||
if (*cp != '\0')
|
||
continue;
|
||
|
||
*num = acc;
|
||
return;
|
||
}
|
||
|
||
}
|
||
|
||
int
|
||
type_match(key, item)
|
||
const void *key, *item;
|
||
{
|
||
const int *typep = key;
|
||
const struct part_type *ptr = item;
|
||
|
||
if (*typep < ptr->type)
|
||
return (-1);
|
||
if (*typep > ptr->type)
|
||
return (1);
|
||
return (0);
|
||
}
|
||
|
||
char *
|
||
get_type(type)
|
||
int type;
|
||
{
|
||
struct part_type *ptr;
|
||
|
||
ptr = bsearch(&type, part_types,
|
||
sizeof(part_types) / sizeof(struct part_type),
|
||
sizeof(struct part_type), type_match);
|
||
if (ptr == 0)
|
||
return ("unknown");
|
||
return (ptr->name);
|
||
}
|