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NetBSD/sbin/fdisk/fdisk.c

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/* $NetBSD: fdisk.c,v 1.56 2002/10/08 07:38:47 jdarrow 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 1.56 2002/10/08 07:38:47 jdarrow Exp $");
#endif /* not lint */
#include <sys/types.h>
#include <sys/disklabel.h>
#include <sys/disklabel_mbr.h>
#include <sys/ioctl.h>
#include <sys/param.h>
#include <sys/stat.h>
#include <sys/sysctl.h>
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <paths.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <util.h>
#ifdef __i386__
#include <machine/cpu.h>
#endif
#define LBUF 100
static char lbuf[LBUF];
/*
* 14-Dec-89 Robert Baron (rvb) at Carnegie-Mellon University
* Copyright (c) 1989 Robert. V. Baron
* Created.
*/
#ifndef _PATH_DEFDISK
#define _PATH_DEFDISK "/dev/rwd0d"
#endif
const char *disk = _PATH_DEFDISK;
struct disklabel disklabel; /* disk parameters */
int cylinders, sectors, heads, cylindersectors, disksectors;
struct mboot {
u_int8_t padding[2]; /* force the longs to be long alligned */
u_int8_t bootinst[MBR_PARTOFF];
struct mbr_partition parts[NMBRPART];
u_int16_t signature;
};
struct mboot mboot;
#ifdef __i386__
#define PARTNAMESIZE 8 /* From mbr_bootsel.S */
struct mbr_bootsel {
u_int8_t defkey;
u_int8_t flags;
u_int16_t timeo;
char nametab[4][PARTNAMESIZE + 1];
u_int16_t magic;
} __attribute__((packed));
#define BFL_SELACTIVE 0x01
#define BFL_EXTINT13 0x02
#define SCAN_ENTER 0x1c
#define SCAN_F1 0x3b
#define MBR_BOOTSELOFF (MBR_PARTOFF - sizeof (struct mbr_bootsel))
#define DEFAULT_BOOTCODE "/usr/mdec/mbr"
#define DEFAULT_BOOTSELCODE "/usr/mdec/mbr_bootsel"
#define OPTIONS "0123BSafilus:b:c:"
#else
#define OPTIONS "0123Safilus:b:c:"
#endif
#define ACTIVE 0x80
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)
#define MAXCYL 1024
int partition = -1;
int a_flag; /* set active partition */
int i_flag; /* init bootcode */
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_flag; /* Edit/install bootselect code */
int b_cyl, b_head, b_sec; /* b_flag values. */
int bootsel_modified;
unsigned char bootcode[8192]; /* maximum size of bootcode */
unsigned char tempcode[8192];
int bootsize; /* actual size of bootcode */
static char reserved[] = "reserved";
struct part_type {
int type;
const 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 partition"},
{0x06, "Primary 'big' DOS, 16-bit FAT (> 32MB)"},
{0x07, "OS/2 HPFS or NTFS or QNX2 or Advanced UNIX"},
{0x08, "AIX filesystem or OS/2 (thru v1.3) or DELL multiple drives"
"or Commodore DOS or SplitDrive"},
{0x09, "AIX boot partition or Coherent"},
{0x0A, "OS/2 Boot Manager or Coherent swap or OPUS"},
{0x0b, "Primary DOS with 32 bit FAT"},
{0x0c, "Primary DOS with 32 bit FAT - LBA"},
{0x0d, "Type 7??? - LBA"},
{0x0E, "DOS (16-bit FAT) - LBA"},
{0x0F, "Ext. partition - LBA"},
{0x10, "OPUS"},
{0x11, "OS/2 BM: hidden DOS 12-bit FAT"},
{0x12, "Compaq diagnostics"},
{0x14, "OS/2 BM: hidden DOS 16-bit FAT <32M or Novell DOS 7.0 bug"},
{0x16, "OS/2 BM: hidden DOS 16-bit FAT >=32M"},
{0x17, "OS/2 BM: hidden IFS"},
{0x18, "AST Windows swapfile"},
{0x19, "Willowtech Photon coS"},
{0x1e, "hidden FAT95"},
{0x20, "Willowsoft OFS1"},
{0x21, reserved},
{0x23, reserved},
{0x24, "NEC DOS"},
{0x26, reserved},
{0x31, reserved},
{0x33, reserved},
{0x34, reserved},
{0x36, reserved},
{0x38, "Theos"},
{0x3C, "PartitionMagic recovery"},
{0x40, "VENIX 286 or LynxOS"},
{0x41, "Linux/MINIX (sharing disk with DRDOS) or Personal RISC boot"},
{0x42, "SFS or Linux swap (sharing disk with DRDOS)"},
{0x43, "Linux native (sharing disk with DRDOS)"},
{0x4D, "QNX4.x"},
{0x4E, "QNX4.x 2nd part"},
{0x4F, "QNX4.x 3rd part"},
{0x50, "DM (disk manager)"},
{0x51, "DM6 Aux1 (or Novell)"},
{0x52, "CP/M or Microport SysV/AT"},
{0x53, "DM6 Aux3"},
{0x54, "DM6 DDO"},
{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) or MtXinu"},
{0x64, "Novell Netware 2.xx or Speedstore"},
{0x65, "Novell Netware 3.xx"},
{0x66, "Novell 386 Netware"},
{0x67, "Novell"},
{0x68, "Novell"},
{0x69, "Novell"},
{0x70, "DiskSecure Multi-Boot"},
{0x71, reserved},
{0x73, reserved},
{0x74, reserved},
{0x75, "PC/IX"},
{0x76, reserved},
{0x80, "MINIX until 1.4a"},
{0x81, "MINIX since 1.4b, early Linux, Mitac dmgr"},
{0x82, "Linux swap or Prime or Solaris"},
{0x83, "Linux native"},
{0x84, "OS/2 hidden C: drive"},
{0x85, "Linux extended"},
{0x86, "NT FAT volume set"},
{0x87, "NTFS volume set or HPFS mirrored"},
{0x93, "Amoeba filesystem"},
{0x94, "Amoeba bad block table"},
{0x99, "Mylex EISA SCSI"},
{0x9f, "BSDI?"},
{0xA0, "IBM Thinkpad hibernation"},
{0xa1, reserved},
{0xa3, reserved},
{0xa4, reserved},
{0xA5, "FreeBSD or 386BSD or old NetBSD"},
{0xA6, "OpenBSD"},
{0xA7, "NeXTSTEP 486"},
{0xa8, "Apple UFS"},
{0xa9, "NetBSD"},
{0xab, "Apple Boot"},
{0xaf, "Apple HFS"},
{0xb1, reserved},
{0xb3, reserved},
{0xb4, reserved},
{0xb6, reserved},
{0xB7, "BSDI BSD/386 filesystem"},
{0xB8, "BSDI BSD/386 swap"},
{0xc0, "CTOS"},
{0xC1, "DRDOS/sec (FAT-12)"},
{0xC4, "DRDOS/sec (FAT-16, < 32M)"},
{0xC6, "DRDOS/sec (FAT-16, >= 32M)"},
{0xC7, "Syrinx (Cyrnix?) or HPFS disabled"},
{0xd8, "CP/M 86"},
{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 or Storage Dimensions"},
{0xE4, "SpeedStor 16-bit FAT extended partition < 1024 cyl."},
{0xe5, reserved},
{0xe6, reserved},
{0xeb, "BeOS"},
{0xF1, "SpeedStor or Storage Dimensions"},
{0xF2, "DOS 3.3+ Secondary"},
{0xf3, reserved},
{0xF4, "SpeedStor large partition or Storage Dimensions"},
{0xf6, reserved},
{0xFE, "SpeedStor >1024 cyl. or LANstep or IBM PS/2 IML"},
{0xFF, "Xenix Bad Block Table"},
};
#define KNOWN_SYSIDS (sizeof(part_types)/sizeof(part_types[0]))
void usage(void);
void print_s0(int);
void print_part(int);
void print_mbr_partition(struct mbr_partition *, off_t, off_t, int);
int read_boot(const char *, void *, size_t);
void init_sector0(int, int);
void intuit_translated_geometry(void);
void get_geometry(void);
void get_diskname(const char *, char *, size_t);
int try_heads(quad_t, quad_t, quad_t, quad_t, quad_t, quad_t, quad_t,
quad_t);
int try_sectors(quad_t, quad_t, quad_t, quad_t, quad_t);
void change_part(int, int, int, int);
void print_params(void);
void change_active(int);
void get_params_to_use(void);
void dos(int, unsigned char *, unsigned char *, unsigned char *);
int open_disk(int);
int read_disk(off_t, void *);
int write_disk(off_t, void *);
int get_params(void);
int read_s0(off_t, struct mboot *);
int write_s0(void);
int yesno(const char *);
void decimal(const char *, int *);
int type_match(const void *, const void *);
const char *get_type(int);
int get_mapping(int, int *, int *, int *, unsigned long *);
#ifdef __i386__
void configure_bootsel(void);
#endif
static unsigned short getshort(void *);
static void putshort(void *p, unsigned short);
static unsigned long getlong(void *);
static void putlong(void *, unsigned long);
int main(int, char *[]);
int
main(int argc, char *argv[])
{
int ch, part, mib[2];
size_t len;
char *root_device;
int csysid, cstart, csize; /* For the b_flag. */
mib[0] = CTL_KERN;
mib[1] = KERN_ROOT_DEVICE;
if (sysctl(mib, 2, NULL, &len, NULL, 0) != -1 &&
(root_device = malloc(len)) != NULL &&
sysctl(mib, 2, root_device, &len, NULL, 0) != -1)
disk = root_device;
a_flag = i_flag = u_flag = sh_flag = f_flag = s_flag = b_flag = 0;
csysid = cstart = csize = 0;
while ((ch = getopt(argc, argv, OPTIONS)) != -1)
switch (ch) {
case '0':
partition = 0;
break;
case '1':
partition = 1;
break;
case '2':
partition = 2;
break;
case '3':
partition = 3;
break;
#ifdef __i386__
case 'B':
B_flag = 1;
break;
#endif
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 'l':
for (len = 0; len < KNOWN_SYSIDS; len++)
printf("%03d %s\n", part_types[len].type,
part_types[len].name);
return 0;
case 'u':
u_flag = 1;
break;
case 's':
s_flag = 1;
if (sscanf(optarg, "%d/%d/%d", &csysid, &cstart,
&csize) != 3)
errx(1, "Bad argument to the -s flag.");
break;
case 'b':
b_flag = 1;
if (sscanf(optarg, "%d/%d/%d", &b_cyl, &b_head,
&b_sec) != 3)
errx(1, "Bad argument to the -b flag.");
if (b_cyl > MAXCYL)
b_cyl = MAXCYL;
break;
case 'c':
bootsize = read_boot(optarg, bootcode, sizeof bootcode);
break;
default:
usage();
}
argc -= optind;
argv += optind;
if (sh_flag && (a_flag || i_flag || u_flag || f_flag || s_flag))
usage();
if (B_flag && (a_flag || i_flag || u_flag || f_flag || s_flag))
usage();
if (partition == -1 && s_flag) {
warnx("-s flag requires a partition selected.");
usage();
}
if (argc > 0)
disk = argv[0];
if (open_disk(B_flag || a_flag || i_flag || u_flag) < 0)
exit(1);
if (read_s0(0, &mboot))
init_sector0(sectors > 63 ? 63 : sectors, 1);
#ifdef __i386__
get_geometry();
#else
intuit_translated_geometry();
#endif
if ((i_flag || u_flag) && (!f_flag || b_flag))
get_params_to_use();
if (i_flag)
init_sector0(dos_sectors > 63 ? 63 : dos_sectors, 0);
/* Do the update stuff! */
if (u_flag) {
if (!f_flag)
printf("Partition table:\n");
if (partition == -1)
for (part = 0; part < NMBRPART; 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);
#ifdef __i386__
if (B_flag) {
configure_bootsel();
if (B_flag && bootsel_modified)
write_s0();
}
#endif
if (u_flag || a_flag || i_flag) {
if (!f_flag) {
printf("\nWe haven't written the MBR back to disk "
"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)
{
(void)fprintf(stderr, "Usage: %s [-aiufBS] [-0|-1|-2|-3] "
"[-b cylinders/heads/sectors]\n"
"\t%s [-s id/start/size] [-c bootcode] [device]\n",
getprogname(), getprogname());
exit(1);
}
void
print_s0(int which)
{
int part;
print_params();
if (!sh_flag)
printf("Partition table:\n");
if (which == -1) {
for (part = 0; part < NMBRPART; part++) {
if (!sh_flag)
printf("%d: ", part);
print_part(part);
}
} else
print_part(which);
}
static unsigned short
getshort(void *p)
{
unsigned char *cp = p;
return cp[0] | (cp[1] << 8);
}
static void
putshort(void *p, unsigned short l)
{
unsigned char *cp = p;
*cp++ = l;
*cp++ = l >> 8;
}
static unsigned long
getlong(void *p)
{
unsigned char *cp = p;
return cp[0] | (cp[1] << 8) | (cp[2] << 16) | (cp[3] << 24);
}
static void
putlong(void *p, unsigned long l)
{
unsigned char *cp = p;
*cp++ = l;
*cp++ = l >> 8;
*cp++ = l >> 16;
*cp++ = l >> 24;
}
void
print_part(int part)
{
struct mbr_partition *partp;
int empty;
partp = &mboot.parts[part];
empty = (partp->mbrp_typ == 0);
if (sh_flag) {
if (empty) {
printf("PART%dSIZE=0\n", part);
return;
}
printf("PART%dID=%d\n", part, partp->mbrp_typ);
printf("PART%dSIZE=%ld\n", part, getlong(&partp->mbrp_size));
printf("PART%dSTART=%ld\n", part, getlong(&partp->mbrp_start));
printf("PART%dFLAG=0x%x\n", part, partp->mbrp_flag);
printf("PART%dBCYL=%d\n", part, MBR_PCYL(partp->mbrp_scyl,
partp->mbrp_ssect));
printf("PART%dBHEAD=%d\n", part, partp->mbrp_shd);
printf("PART%dBSEC=%d\n", part, MBR_PSECT(partp->mbrp_ssect));
printf("PART%dECYL=%d\n", part, MBR_PCYL(partp->mbrp_ecyl,
partp->mbrp_esect));
printf("PART%dEHEAD=%d\n", part, partp->mbrp_ehd);
printf("PART%dESEC=%d\n", part, MBR_PSECT(partp->mbrp_esect));
return;
}
print_mbr_partition(partp, 0, 0, 0);
}
void
print_mbr_partition(struct mbr_partition *partp,
off_t offset, off_t exoffset, int indent)
{
int empty;
off_t start;
empty = (partp->mbrp_typ == 0);
if (MBR_IS_EXTENDED(partp->mbrp_typ))
start = (off_t)getlong(&partp->mbrp_start) + exoffset;
else
start = (off_t)getlong(&partp->mbrp_start) + offset;
if (empty) {
printf("<UNUSED>\n");
return;
}
printf("sysid %d (%s)\n",
partp->mbrp_typ, get_type(partp->mbrp_typ));
printf("%*s start %lld, size %ld (%ld MB), flag 0x%x\n",
indent, "",
start, getlong(&partp->mbrp_size),
getlong(&partp->mbrp_size) * 512 / (1024 * 1024), partp->mbrp_flag);
printf("%*s beg: cylinder %4d, head %3d, sector %2d\n",
indent, "",
MBR_PCYL(partp->mbrp_scyl, partp->mbrp_ssect),
partp->mbrp_shd, MBR_PSECT(partp->mbrp_ssect));
printf("%*s end: cylinder %4d, head %3d, sector %2d\n",
indent, "",
MBR_PCYL(partp->mbrp_ecyl, partp->mbrp_esect),
partp->mbrp_ehd, MBR_PSECT(partp->mbrp_esect));
if (MBR_IS_EXTENDED(partp->mbrp_typ)) {
struct mboot eboot;
int part;
printf("%*s Extended partition table:\n", indent, "");
if (read_s0(start, &eboot) == -1)
return;
indent += 8;
if (exoffset == 0)
exoffset = start;
for (part = 0; part < NMBRPART; part++) {
printf("%*s%d: ", indent, "", part);
print_mbr_partition(&eboot.parts[part],
start, exoffset, indent);
}
}
}
int
read_boot(const char *name, void *buf, size_t len)
{
int bfd, ret;
struct stat st;
if ((bfd = open(name, O_RDONLY)) < 0)
err(1, "%s", name);
if (fstat(bfd, &st) == -1)
err(1, "%s", name);
if (st.st_size > len)
errx(1, "%s: bootcode too large", name);
ret = st.st_size;
if (ret < 0x200)
errx(1, "%s: bootcode too small", name);
if (read(bfd, buf, len) != ret)
err(1, "%s", name);
close(bfd);
/*
* Do some sanity checking here
*/
if (getshort(bootcode + MBR_MAGICOFF) != MBR_MAGIC)
errx(1, "%s: invalid magic", name);
ret = (ret + 0x1ff) / 0x200;
ret *= 0x200;
return ret;
}
void
init_sector0(int start, int dopart)
{
int i;
#ifdef DEFAULT_BOOTCODE
if (!bootsize)
bootsize = read_boot(DEFAULT_BOOTCODE, bootcode,
sizeof bootcode);
#endif
memcpy(mboot.bootinst, bootcode, sizeof(mboot.bootinst));
putshort(&mboot.signature, MBR_MAGIC);
if (dopart)
for (i = 0; i < 4; i++)
memset(&mboot.parts[i], 0, sizeof(mboot.parts[i]));
}
#ifdef __i386__
void
get_diskname(const char *fullname, char *diskname, size_t size)
{
const char *p, *p2;
size_t len;
p = strrchr(fullname, '/');
if (p == NULL)
p = fullname;
else
p++;
if (*p == 0) {
strncpy(diskname, fullname, size - 1);
diskname[size - 1] = '\0';
return;
}
if (*p == 'r')
p++;
for (p2 = p; *p2 != 0; p2++)
if (isdigit(*p2))
break;
if (*p2 == 0) {
/* XXX invalid diskname? */
strncpy(diskname, fullname, size - 1);
diskname[size - 1] = '\0';
return;
}
while (isdigit(*p2))
p2++;
len = p2 - p;
if (len > size) {
/* XXX */
strncpy(diskname, fullname, size - 1);
diskname[size - 1] = '\0';
return;
}
strncpy(diskname, p, len);
diskname[len] = 0;
}
void
get_geometry(void)
{
int mib[2], i;
size_t len;
struct disklist *dl;
struct biosdisk_info *bip;
struct nativedisk_info *nip;
char diskname[8];
mib[0] = CTL_MACHDEP;
mib[1] = CPU_DISKINFO;
if (sysctl(mib, 2, NULL, &len, NULL, 0) < 0) {
intuit_translated_geometry();
return;
}
dl = (struct disklist *) malloc(len);
sysctl(mib, 2, dl, &len, NULL, 0);
get_diskname(disk, diskname, sizeof diskname);
for (i = 0; i < dl->dl_nnativedisks; i++) {
nip = &dl->dl_nativedisks[i];
if (strcmp(diskname, nip->ni_devname))
continue;
/*
* XXX listing possible matches is better. This is ok
* for now because the user has a chance to change
* it later.
*/
if (nip->ni_nmatches != 0) {
bip = &dl->dl_biosdisks[nip->ni_biosmatches[0]];
dos_cylinders = bip->bi_cyl;
dos_heads = bip->bi_head;
dos_sectors = bip->bi_sec;
dos_cylindersectors = bip->bi_head * bip->bi_sec;
return;
}
}
/* Allright, allright, make a stupid guess.. */
intuit_translated_geometry();
}
void
configure_bootsel(void)
{
struct mbr_bootsel *mbs =
(struct mbr_bootsel *)&mboot.bootinst[MBR_BOOTSELOFF];
int i, nused, firstpart = -1, item;
char desc[PARTNAMESIZE + 2], *p;
int timo, entry_changed = 0;
for (i = nused = 0; i < NMBRPART; ++i) {
if (mboot.parts[i].mbrp_typ != 0) {
if (firstpart == -1)
firstpart = i;
nused++;
}
}
if (nused == 0) {
warnx("No used partitions found. Partition the disk first.");
return;
}
if (mbs->magic != MBR_MAGIC) {
if (!yesno("Bootselector not yet installed. Install it now?")) {
warnx("Bootselector not installed.");
return;
}
bootsize = read_boot(DEFAULT_BOOTSELCODE, bootcode,
sizeof bootcode);
memcpy(mboot.bootinst, bootcode, sizeof(mboot.bootinst));
bootsel_modified = 1;
mbs->flags |= BFL_SELACTIVE;
} else {
if (mbs->flags & BFL_SELACTIVE) {
printf("The bootselector is installed and active.");
if (!yesno("Do you want to change its settings?")) {
if (yesno("Do you want to deactivate it?")) {
mbs->flags &= ~BFL_SELACTIVE;
bootsel_modified = 1;
goto done;
}
return;
}
} else {
printf("The bootselector is installed but not active.");
if (yesno("Do you want to activate it?")) {
mbs->flags |= BFL_SELACTIVE;
bootsel_modified = 1;
}
if (!yesno("Do you want to change its settings?"))
goto done;
}
}
printf("\n\nPartition table:\n");
for (i = 0; i < NMBRPART; i++) {
printf("%d: ", i);
print_part(i);
}
printf("\n\nCurrent boot selection menu option names:\n");
for (i = 0; i < NMBRPART; i++) {
if (mbs->nametab[i][0] != 0)
printf("%d: %s\n", i, &mbs->nametab[i][0]);
else
printf("%d: <UNUSED>\n", i);
}
printf("\n");
item = firstpart;
editentries:
while (1) {
decimal("Change which entry (-1 quits)?", &item);
if (item == -1)
break;
if (item < 0 || item >= NMBRPART) {
printf("Invalid entry number\n");
item = -1;
continue;
}
if (mboot.parts[item].mbrp_typ == 0) {
printf("The partition entry is unused\n");
item = -1;
continue;
}
printf("Enter descriptions (max. 8 characters): ");
rewind(stdin);
if (!fgets(desc, PARTNAMESIZE + 1, stdin))
errx(1, "EOF");
fpurge(stdin);
p = strchr(desc, '\n');
if (p != NULL)
*p = 0;
strcpy(&mbs->nametab[item][0], desc);
entry_changed = bootsel_modified = 1;
item++;
}
if (entry_changed)
printf("Boot selection menu option names are now:\n");
firstpart = -1;
for (i = 0; i < NMBRPART; i++) {
if (mbs->nametab[i][0] != 0) {
firstpart = i;
if (entry_changed)
printf("%d: %s\n", i, &mbs->nametab[i][0]);
} else {
if (entry_changed)
printf("%d: <UNUSED>\n", i);
}
}
if (entry_changed)
printf("\n");
if (firstpart == -1) {
printf("All menu entries are now inactive.\n");
if (!yesno("Are you sure about this?"))
goto editentries;
} else {
if (!(mbs->flags & BFL_SELACTIVE)) {
printf("The bootselector is not yet active.\n");
if (yesno("Activate it now?"))
mbs->flags |= BFL_SELACTIVE;
}
}
/* bootsel is dirty from here on out. */
bootsel_modified = 1;
/* The timeout value is in ticks, 18.2 Hz. Avoid using floats. */
timo = ((1000 * mbs->timeo) / 18200);
do {
decimal("Timeout value", &timo);
} while (timo < 0 || timo > 3600);
mbs->timeo = (u_int16_t)((timo * 18200) / 1000);
printf("Select the default boot option. Options are:\n\n");
for (i = 0; i < NMBRPART; i++) {
if (mbs->nametab[i][0] != 0)
printf("%d: %s\n", i, &mbs->nametab[i][0]);
}
for (i = 4; i < 10; i++)
printf("%d: Harddisk %d\n", i, i - 4);
printf("10: The first active partition\n");
if (mbs->defkey == SCAN_ENTER)
item = 10;
else
item = mbs->defkey - SCAN_F1;
if (item < 0 || item > 10 || mbs->nametab[item][0] == 0)
item = 10;
do {
decimal("Default boot option", &item);
} while (item < 0 || item > 10 ||
(item <= 3 && mbs->nametab[item][0] == 0));
if (item == 10)
mbs->defkey = SCAN_ENTER;
else
mbs->defkey = SCAN_F1 + item;
done:
for (i = 0; i < NMBRPART; i++) {
if (mboot.parts[i].mbrp_typ != 0 &&
mboot.parts[i].mbrp_start >=
(dos_cylinders * dos_heads * dos_sectors)) {
mbs->flags |= BFL_EXTINT13;
break;
}
}
if (bootsel_modified != 0 && !yesno("Update the bootselector?"))
bootsel_modified = 0;
}
#endif
/* 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(void)
{
int xcylinders = -1, xheads = -1, xsectors = -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 < NMBRPART * 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) - (quad_t)h2*(a1-s1);
denom = (quad_t)c2*(a1-s1) - (quad_t)c1*(a2-s2);
if (denom != 0 && num % denom == 0) {
xheads = num / denom;
break;
}
}
if (xheads != -1)
break;
}
if (xheads == -1)
return;
/* Now figure out the number of sectors from a single mapping. */
for (i = 0; i < NMBRPART * 2; i++) {
if (get_mapping(i, &c1, &h1, &s1, &a1) < 0)
continue;
num = a1 - s1;
denom = c1 * xheads + h1;
if (denom != 0 && num % denom == 0) {
xsectors = num / denom;
break;
}
}
if (xsectors == -1)
return;
/* Estimate the number of cylinders. */
xcylinders = disklabel.d_secperunit / xheads / xsectors;
/* 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 < NMBRPART * 2; i++) {
if (get_mapping(i, &c1, &h1, &s1, &a1) < 0)
continue;
if (xsectors * (c1 * xheads + h1) + s1 != a1)
return;
if (c1 >= xcylinders)
xcylinders = c1 + 1;
}
/* Everything checks out. Reset the geometry to use for further
* calculations. */
dos_cylinders = xcylinders;
dos_heads = xheads;
dos_sectors = xsectors;
dos_cylindersectors = xheads * xsectors;
}
/* 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(int i, int *cylinder, int *head, int *sector,
unsigned long *absolute)
{
struct mbr_partition *part = &mboot.parts[i / 2];
if (part->mbrp_typ == 0)
return -1;
if (i % 2 == 0) {
*cylinder = MBR_PCYL(part->mbrp_scyl, part->mbrp_ssect);
*head = part->mbrp_shd;
*sector = MBR_PSECT(part->mbrp_ssect) - 1;
*absolute = getlong(&part->mbrp_start);
} else {
*cylinder = MBR_PCYL(part->mbrp_ecyl, part->mbrp_esect);
*head = part->mbrp_ehd;
*sector = MBR_PSECT(part->mbrp_esect) - 1;
*absolute = getlong(&part->mbrp_start)
+ getlong(&part->mbrp_size) - 1;
}
return 0;
}
void
change_part(int part, int csysid, int cstart, int csize)
{
struct mbr_partition *partp;
partp = &mboot.parts[part];
if (s_flag) {
if (csysid == 0 && cstart == 0 && csize == 0)
memset(partp, 0, sizeof *partp);
else {
partp->mbrp_typ = csysid;
#if 0
checkcyl(cstart / dos_cylindersectors);
#endif
putlong(&partp->mbrp_start, cstart);
putlong(&partp->mbrp_size, csize);
dos(getlong(&partp->mbrp_start),
&partp->mbrp_scyl, &partp->mbrp_shd, &partp->mbrp_ssect);
dos(getlong(&partp->mbrp_start)
+ getlong(&partp->mbrp_size) - 1,
&partp->mbrp_ecyl, &partp->mbrp_ehd, &partp->mbrp_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->mbrp_typ,
start = getlong(&partp->mbrp_start),
size = getlong(&partp->mbrp_size);
decimal("sysid", &sysid);
decimal("start", &start);
decimal("size", &size);
partp->mbrp_typ = sysid;
putlong(&partp->mbrp_start, start);
putlong(&partp->mbrp_size, size);
}
if (yesno("Explicitly specify beg/end address?")) {
int tsector, tcylinder, thead;
tcylinder = MBR_PCYL(partp->mbrp_scyl,
partp->mbrp_ssect);
thead = partp->mbrp_shd;
tsector = MBR_PSECT(partp->mbrp_ssect);
decimal("beginning cylinder", &tcylinder);
#if 0
checkcyl(tcylinder);
#endif
decimal("beginning head", &thead);
decimal("beginning sector", &tsector);
partp->mbrp_scyl = DOSCYL(tcylinder);
partp->mbrp_shd = thead;
partp->mbrp_ssect = DOSSECT(tsector, tcylinder);
tcylinder = MBR_PCYL(partp->mbrp_ecyl,
partp->mbrp_esect);
thead = partp->mbrp_ehd;
tsector = MBR_PSECT(partp->mbrp_esect);
decimal("ending cylinder", &tcylinder);
decimal("ending head", &thead);
decimal("ending sector", &tsector);
partp->mbrp_ecyl = DOSCYL(tcylinder);
partp->mbrp_ehd = thead;
partp->mbrp_esect = DOSSECT(tsector, tcylinder);
} else {
if (partp->mbrp_typ == 0
&& getlong(&partp->mbrp_start) == 0
&& getlong(&partp->mbrp_size) == 0)
memset(partp, 0, sizeof *partp);
else {
#if 0
checkcyl(getlong(&partp->mbrp_start)
/ dos_cylindersectors);
#endif
dos(getlong(&partp->mbrp_start),
&partp->mbrp_scyl,
&partp->mbrp_shd, &partp->mbrp_ssect);
dos(getlong(&partp->mbrp_start)
+ getlong(&partp->mbrp_size) - 1,
&partp->mbrp_ecyl, &partp->mbrp_ehd,
&partp->mbrp_esect);
}
}
print_part(part);
} while (!yesno("Is this entry okay?"));
}
void
print_params(void)
{
if (sh_flag) {
printf ("DLCYL=%d\nDLHEAD=%d\nDLSEC=%d\nDLSIZE=%d\n",
cylinders, heads, sectors, disksectors);
printf ("BCYL=%d\nBHEAD=%d\nBSEC=%d\n",
dos_cylinders, dos_heads, dos_sectors);
return;
}
/* Not sh_flag */
printf("Disk: %s\n", disk);
printf("NetBSD disklabel disk geometry:\n");
printf("cylinders: %d heads: %d sectors/track: %d (%d sectors/cylinder)\n\n",
cylinders, heads, sectors, cylindersectors);
printf("BIOS disk geometry:\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(int which)
{
struct mbr_partition *partp;
int part;
int active = 4;
partp = &mboot.parts[0];
if (a_flag && which != -1)
active = which;
else {
for (part = 0; part < NMBRPART; part++)
if (partp[part].mbrp_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 < NMBRPART; part++)
partp[part].mbrp_flag &= ~ACTIVE;
if (active < 4)
partp[active].mbrp_flag |= ACTIVE;
}
void
get_params_to_use(void)
{
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(int sector, unsigned char *cylinderp, unsigned char *headp,
unsigned char *sectorp)
{
int cylinder, head;
int biosmaxsec;
biosmaxsec = dos_cylinders * dos_heads * dos_sectors - 1;
if (sector > biosmaxsec)
sector = biosmaxsec;
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);
}
#if 0
void
checkcyl(int cyl)
{
if (cyl >= MAXCYL)
warnx("partition start beyond BIOS limit");
}
#endif
int fd = -1;
int
open_disk(int update)
{
static char namebuf[MAXPATHLEN + 1];
fd = opendisk(disk, update ? O_RDWR : O_RDONLY, namebuf,
sizeof(namebuf), 0);
if (fd < 0) {
if (errno == ENODEV)
warnx("%s is not a character device", namebuf);
else
warn("%s", namebuf);
return (-1);
}
disk = namebuf;
if (get_params() == -1) {
close(fd);
return (-1);
}
return (0);
}
int
read_disk(off_t sector, void *buf)
{
if (fd == -1)
errx(1, "read_disk(); fd == -1");
if (lseek(fd, sector * 512, 0) == -1)
return (-1);
return (read(fd, buf, 512));
}
int
write_disk(off_t sector, void *buf)
{
if (fd == -1)
errx(1, "write_disk(); fd == -1");
if (lseek(fd, sector * 512, 0) == -1)
return (-1);
return (write(fd, buf, 512));
}
int
get_params(void)
{
if (ioctl(fd, DIOCGDEFLABEL, &disklabel) == -1) {
warn("DIOCGDEFLABEL");
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 = disklabel.d_secperunit;
return (0);
}
int
read_s0(off_t offset, struct mboot *boot)
{
if (read_disk(offset, boot->bootinst) == -1) {
warn("can't read %s partition table",
offset ? "extended" : "fdisk");
return (-1);
}
if (getshort(&boot->signature) != MBR_MAGIC) {
warnx("invalid %s partition table found",
offset ? "extended" : "fdisk");
return (-1);
}
return (0);
}
int
write_s0(void)
{
int flag, i;
/*
* 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;
}
for (i = bootsize; (i -= 0x200) > 0;)
if (write_disk(i / 0x200, bootcode + i) == -1) {
warn("can't write bootcode");
return -1;
}
flag = 0;
if (ioctl(fd, DIOCWLABEL, &flag) < 0)
warn("DIOCWLABEL");
return 0;
}
int
yesno(const char *str)
{
int ch, first;
printf("%s [n] ", str);
first = ch = getchar();
while (ch != '\n' && ch != EOF)
ch = getchar();
if (ch == EOF)
errx(1, "EOF");
return (first == 'y' || first == 'Y');
}
void
decimal(const char *str, int *num)
{
int acc = 0;
char *cp;
for (;; printf("%s is not a valid decimal number.\n", lbuf)) {
printf("%s: [%d] ", str, *num);
if (!fgets(lbuf, LBUF, stdin))
errx(1, "EOF");
lbuf[strlen(lbuf)-1] = '\0';
cp = lbuf;
cp += strspn(cp, " \t");
if (*cp == '\0')
return;
if (!isdigit(*cp) && *cp != '-')
continue;
acc = strtol(lbuf, &cp, 10);
cp += strspn(cp, " \t");
if (*cp != '\0')
continue;
*num = acc;
return;
}
}
int
type_match(const void *key, const void *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);
}
const char *
get_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);
}
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