/*
* 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/types.h>
#include <sys/disklabel.h>
#include <stdio.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <fcntl.h>
int iotest;
#define LBUF 100
static char lbuf[LBUF];
/*
*
* Ported to 386bsd by Julian Elischer Thu Oct 15 20:26:46 PDT 1992
*
* 14-Dec-89 Robert Baron (rvb) at Carnegie-Mellon University
* Copyright (c) 1989 Robert. V. Baron
* Created.
*/
#define Decimal(str, ans, tmp) if (decimal(str, &tmp, ans)) ans = tmp
#define Hex(str, ans, tmp) if (hex(str, &tmp, ans)) ans = tmp
#define String(str, ans, len) {char *z = ans; char **dflt = &z; if (string(str, dflt)) strncpy(ans, *dflt, len); }
#define RoundCyl(x) ((((x) + cylsecs - 1) / cylsecs) * cylsecs)
#define SECSIZE 512
char *disk = "/dev/rwd0d";
char *name;
struct disklabel disklabel; /* disk parameters */
int cyls, sectors, heads, cylsecs, disksecs;
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_cyls;
int dos_heads;
int dos_sectors;
int dos_cylsecs;
#define DOSSECT(s,c) ((s & 0x3f) | ((c >> 2) & 0xc0))
#define DOSCYL(c) (c & 0xff)
static int dos();
char *get_type();
static int partition = -1;
static int a_flag = 0; /* set active partition */
static int i_flag = 0; /* replace partition data */
static int u_flag = 0; /* update partition data */
static 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
{
unsigned char 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"}
,{0x05, "Extended DOS"}
,{0x06, "Primary 'big' DOS (> 32MB)"}
,{0x07, "OS/2 HPFS, QNX or Advanced UNIX"}
,{0x08, "AIX filesystem"}
,{0x09, "AIX boot partition or Coherent"}
,{0x0A, "OS/2 Boot Manager or OPUS"}
,{0x10, "OPUS"}
,{0x40, "VENIX 286"}
,{0x50, "DM"}
,{0x51, "DM"}
,{0x52, "CP/M or Microport SysV/AT"}
,{0x56, "GB"}
,{0x61, "Speed"}
,{0x63, "ISC UNIX, other System V/386, GNU HURD or Mach"}
,{0x64, "Novell Netware 2.xx"}
,{0x65, "Novell Netware 3.xx"}
,{0x75, "PCIX"}
,{0x80, "Minix 1.1 ... 1.4a"}
,{0x81, "Minix 1.4b ... 1.5.10"}
,{0x82, "Linux"}
,{0x93, "Amoeba filesystem"}
,{0x94, "Amoeba bad block table"}
,{0xA5, "386BSD"}
,{0xB7, "BSDI BSD/386 filesystem"}
,{0xB8, "BSDI BSD/386 swap"}
,{0xDB, "Concurrent CPM or C.DOS or CTOS"}
,{0xE1, "Speed"}
,{0xE3, "Speed"}
,{0xE4, "Speed"}
,{0xF1, "Speed"}
,{0xF2, "DOS 3.3+ Secondary"}
,{0xF4, "Speed"}
,{0xFF, "BBT (Bad Blocks Table)"}
};
main(argc, argv)
char **argv;
{
int i;
name = *argv;
{register char *cp = name;
while (*cp) if (*cp++ == '/') name = cp;
}
for ( argv++ ; --argc ; argv++ ) { register char *token = *argv;
if (*token++ != '-' || !*token)
break;
else { register int flag;
for ( ; flag = *token++ ; ) {
switch (flag) {
case '0':
partition = 0;
break;
case '1':
partition = 1;
break;
case '2':
partition = 2;
break;
case '3':
partition = 3;
break;
case 'a':
a_flag = 1;
break;
case 'i':
i_flag = 1;
case 'u':
u_flag = 1;
break;
default:
goto usage;
}
}
}
}
if (argc > 0)
disk = argv[0];
if (open_disk(u_flag) < 0)
exit(1);
printf("******* Working on device %s *******\n",disk);
if(u_flag)
{
get_params_to_use();
}
else
{
print_params();
}
if (read_s0())
init_sector0(1);
printf("Warning: BIOS sector numbering starts with sector 1\n");
printf("Information from DOS bootblock is:\n");
if (partition == -1)
for (i = 0; i < NDOSPART; i++)
change_part(i);
else
change_part(partition);
if (u_flag || a_flag)
change_active(partition);
if (u_flag || a_flag) {
printf("\nWe haven't changed the partition table yet. ");
printf("This is your last chance.\n");
print_s0(-1);
if (ok("Should we write new partition table?"))
write_s0();
}
exit(0);
usage:
printf("fdisk {-a|-i|-r} {disk}\n");
}
print_s0(which)
{
int i;
print_params();
printf("Information from DOS bootblock is:\n");
if (which == -1)
for (i = 0; i < NDOSPART; i++)
printf("%d: ", i), print_part(i);
else
print_part(which);
}
static struct dos_partition mtpart = { 0 };
print_part(i)
{
struct dos_partition *partp = ((struct dos_partition *) &mboot.parts) + i;
if (!bcmp(partp, &mtpart, sizeof (struct dos_partition))) {
printf("<UNUSED>\n");
return;
}
printf("sysid %d,(%s)\n", partp->dp_typ, get_type(partp->dp_typ));
printf(" start %d, size %d (%d Meg), flag %x\n",
partp->dp_start,
partp->dp_size, partp->dp_size * 512 / (1024 * 1024),
partp->dp_flag);
printf("\tbeg: cyl %d/ sector %d/ head %d;\n\tend: cyl %d/ sector %d/ head %d\n"
,DPCYL(partp->dp_scyl, partp->dp_ssect)
,DPSECT(partp->dp_ssect)
,partp->dp_shd
,DPCYL(partp->dp_ecyl, partp->dp_esect)
,DPSECT(partp->dp_esect)
,partp->dp_ehd);
}
init_sector0(start)
{
struct dos_partition *partp = (struct dos_partition *) (&mboot.parts[3]);
int size = disksecs - start;
int rest;
memcpy(mboot.bootinst, bootcode, sizeof(bootcode));
mboot.signature = BOOT_MAGIC;
partp->dp_typ = DOSPTYP_386BSD;
partp->dp_flag = ACTIVE;
partp->dp_start = start;
partp->dp_size = size;
dos(partp->dp_start, &partp->dp_scyl, &partp->dp_ssect, &partp->dp_shd);
dos(partp->dp_start+partp->dp_size, &partp->dp_ecyl, &partp->dp_esect, &partp->dp_ehd);
}
change_part(i)
{
struct dos_partition *partp = ((struct dos_partition *) &mboot.parts) + i;
printf("The data for partition %d is:\n", i);
print_part(i);
if (u_flag && ok("Do you want to change it?")) {
int tmp;
if (i_flag) {
bzero((char *)partp, sizeof (struct dos_partition));
if (i == 3) {
init_sector0(1);
printf("\nThe static data for the DOS partition 3 has been reinitialized to:\n");
print_part(i);
}
}
do {
Decimal("sysid", partp->dp_typ, tmp);
Decimal("start", partp->dp_start, tmp);
Decimal("size", partp->dp_size, tmp);
if (ok("Explicitly specifiy beg/end address ?"))
{
int tsec,tcyl,thd;
tcyl = DPCYL(partp->dp_scyl,partp->dp_ssect);
thd = partp->dp_shd;
tsec = DPSECT(partp->dp_ssect);
Decimal("beginning cylinder", tcyl, tmp);
Decimal("beginning head", thd, tmp);
Decimal("beginning sector", tsec, tmp);
partp->dp_scyl = DOSCYL(tcyl);
partp->dp_ssect = DOSSECT(tsec,tcyl);
partp->dp_shd = thd;
tcyl = DPCYL(partp->dp_ecyl,partp->dp_esect);
thd = partp->dp_ehd;
tsec = DPSECT(partp->dp_esect);
Decimal("ending cylinder", tcyl, tmp);
Decimal("ending head", thd, tmp);
Decimal("ending sector", tsec, tmp);
partp->dp_ecyl = DOSCYL(tcyl);
partp->dp_esect = DOSSECT(tsec,tcyl);
partp->dp_ehd = thd;
} else {
dos(partp->dp_start,
&partp->dp_scyl, &partp->dp_ssect, &partp->dp_shd);
dos(partp->dp_start+partp->dp_size - 1,
&partp->dp_ecyl, &partp->dp_esect, &partp->dp_ehd);
}
print_part(i);
} while (!ok("Are we happy with this entry?"));
}
}
print_params()
{
printf("parameters extracted from in-core disklabel are:\n");
printf("cylinders=%d heads=%d sectors/track=%d (%d blks/cyl)\n\n"
,cyls,heads,sectors,cylsecs);
if((dos_sectors > 63) || (dos_cyls > 1023) || (dos_heads > 255))
printf(" Figures below won't work with BIOS for partitions not in cyl 1\n");
printf("parameters to be used for BIOS calculations are:\n");
printf("cylinders=%d heads=%d sectors/track=%d (%d blks/cyl)\n\n"
,dos_cyls,dos_heads,dos_sectors,dos_cylsecs);
}
change_active(which)
{
int i;
int active = 3, tmp;
struct dos_partition *partp = ((struct dos_partition *) &mboot.parts);
if (a_flag && which != -1)
active = which;
if (ok("Do you want to change the active partition?")) {
do
Decimal("active partition", active, tmp);
while(!ok("Are you happy with this choice"));
}
for (i = 0; i < NDOSPART; i++)
partp[i].dp_flag = 0;
partp[active].dp_flag = ACTIVE;
}
get_params_to_use()
{
int tmp;
print_params();
if (ok("Do you want to change our idea of what BIOS thinks ?"))
{
do
{
Decimal("BIOS's idea of #cylinders", dos_cyls, tmp);
Decimal("BIOS's idea of #heads", dos_heads, tmp);
Decimal("BIOS's idea of #sectors", dos_sectors, tmp);
dos_cylsecs = dos_heads * dos_sectors;
print_params();
}
while(!ok("Are you happy with this choice"));
}
}
/***********************************************\
* Change real numbers into strange dos numbers *
\***********************************************/
static
dos(sec, c, s, h)
int sec;
unsigned char *c, *s, *h;
{
int cy;
int hd;
cy = sec / ( dos_cylsecs );
sec = sec - cy * ( dos_cylsecs );
hd = sec / dos_sectors;
sec = (sec - hd * dos_sectors) + 1;
*h = hd;
*c = cy & 0xff;
*s = (sec & 0x3f) | ( (cy & 0x300) >> 2);
}
int fd;
/* Getting device status */
open_disk(u_flag)
{
struct stat st;
if (stat(disk, &st) == -1) {
fprintf(stderr, "%s: Can't get file status of %s\n",
name, disk);
return -1;
} else if ( !(st.st_mode & S_IFCHR) ) {
fprintf(stderr,"%s: Device %s is not character special\n",
name, disk);
return -1;
}
if ((fd = open(disk, u_flag?O_RDWR:O_RDONLY)) == -1) {
fprintf(stderr,"%s: Can't open device %s\n", name, disk);
return -1;
}
if (get_params(0) == -1) {
fprintf(stderr, "%s: Can't get disk parameters on %s\n",
name, disk);
return -1;
}
return fd;
}
read_disk(sector, buf)
{
lseek(fd,(sector * 512), 0);
return read(fd, buf, 512);
}
write_disk(sector, buf)
{
lseek(fd,(sector * 512), 0);
return write(fd, buf, 512);
}
get_params(verbose)
{
if (ioctl(fd, DIOCGDINFO, &disklabel) == -1) {
return -1;
}
dos_cyls = cyls = disklabel.d_ncylinders;
dos_heads = heads = disklabel.d_ntracks;
dos_sectors = sectors = disklabel.d_nsectors;
dos_cylsecs = cylsecs = heads * sectors;
disksecs = cyls * heads * sectors;
return (disksecs);
}
read_s0()
{
if (read_disk(0, (char *) mboot.bootinst) == -1) {
fprintf(stderr, "%s: Can't read fdisk partition table\n", name);
return -1;
}
if (mboot.signature != BOOT_MAGIC) {
fprintf(stderr, "%s: Invalid fdisk partition table found\n",
name);
/* So should we initialize things */
return -1;
}
return 0;
}
write_s0()
{
int flag;
if (iotest) {
print_s0(-1);
return 0;
}
/*
* 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)
perror("ioctl DIOCWLABEL");
if (write_disk(0, (char *) mboot.bootinst) == -1) {
fprintf(stderr, "%s: Can't write fdisk partition table\n",
name);
return -1;
flag = 0;
(void) ioctl(fd, DIOCWLABEL, &flag);
}
}
ok(str)
char *str;
{
printf("%s [n] ", str);
fgets(lbuf, LBUF, stdin);
lbuf[strlen(lbuf)-1] = 0;
if (*lbuf &&
(!strcmp(lbuf, "yes") || !strcmp(lbuf, "YES") ||
!strcmp(lbuf, "y") || !strcmp(lbuf, "Y")))
return 1;
else
return 0;
}
decimal(str, num, deflt)
char *str;
int *num;
{
int acc = 0, c;
char *cp;
while (1) {
printf("Supply a decimal value for \"%s\" [%d] ", str, deflt);
fgets(lbuf, LBUF, stdin);
lbuf[strlen(lbuf)-1] = 0;
if (!*lbuf)
return 0;
cp = lbuf;
while ((c = *cp) && (c == ' ' || c == '\t')) cp++;
if (!c)
return 0;
while (c = *cp++) {
if (c <= '9' && c >= '0')
acc = acc * 10 + c - '0';
else
break;
}
if (c == ' ' || c == '\t')
while ((c = *cp) && (c == ' ' || c == '\t')) cp++;
if (!c) {
*num = acc;
return 1;
} else
printf("%s is an invalid decimal number. Try again\n",
lbuf);
}
}
hex(str, num, deflt)
char *str;
int *num;
{
int acc = 0, c;
char *cp;
while (1) {
printf("Supply a hex value for \"%s\" [%x] ", str, deflt);
fgets(lbuf, LBUF, stdin);
lbuf[strlen(lbuf)-1] = 0;
if (!*lbuf)
return 0;
cp = lbuf;
while ((c = *cp) && (c == ' ' || c == '\t')) cp++;
if (!c)
return 0;
while (c = *cp++) {
if (c <= '9' && c >= '0')
acc = (acc << 4) + c - '0';
else if (c <= 'f' && c >= 'a')
acc = (acc << 4) + c - 'a' + 10;
else if (c <= 'F' && c >= 'A')
acc = (acc << 4) + c - 'A' + 10;
else
break;
}
if (c == ' ' || c == '\t')
while ((c = *cp) && (c == ' ' || c == '\t')) cp++;
if (!c) {
*num = acc;
return 1;
} else
printf("%s is an invalid hex number. Try again\n",
lbuf);
}
}
string(str, ans)
char *str;
char **ans;
{
int c;
char *cp = lbuf;
while (1) {
printf("Supply a string value for \"%s\" [%s] ", str, *ans);
fgets(lbuf, LBUF, stdin);
lbuf[strlen(lbuf)-1] = 0;
if (!*lbuf)
return 0;
while ((c = *cp) && (c == ' ' || c == '\t')) cp++;
if (c == '"') {
c = *++cp;
*ans = cp;
while ((c = *cp) && c != '"') cp++;
} else {
*ans = cp;
while ((c = *cp) && c != ' ' && c != '\t') cp++;
}
if (c)
*cp = 0;
return 1;
}
}
char *get_type(type)
int type;
{
int numentries = (sizeof(part_types)/sizeof(struct part_type));
int counter = 0;
struct part_type *ptr = part_types;
while(counter < numentries)
{
if(ptr->type == type)
{
return(ptr->name);
}
ptr++;
counter++;
}
return("unknown");
}
