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Initial import, 0.1 + pk 0.2.4-B1

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rgrimes 1993-06-12 14:58:17 +00:00
parent 05cb592c95
commit 854999a7d1
10 changed files with 1914 additions and 0 deletions
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6
sbin/comcontrol/Makefile Normal file
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# @(#)Makefile 5.4 (Berkeley) 6/5/91
PROG= comcontrol
NOMAN= noman
.include <bsd.prog.mk>

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/*-
* Copyright (c) 1992 Christopher G. Demetriou
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote
* products derived from this software without specific written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/* comcontrol.c */
#include <sys/types.h>
#include <sys/ioctl.h>
#include <stdio.h>
#include <fcntl.h>
void usage(char *progname)
{
fprintf(stderr, "usage: %s <filename> [[-]bidir]\n", progname);
exit(1);
}
int main(int argc, char *argv[])
{
int fd;
int res;
if ((argc < 2) || (argc > 3)) usage(argv[0]);
fd = open(argv[1], O_RDONLY|O_NONBLOCK, 0);
if (fd < 0) {
fprintf(stderr, "%s: couldn't open file %s\n", argv[0], argv[1]);
perror("open");
exit(1);
}
if (argc == 2) {
if (ioctl(fd, TIOCMGBIDIR, &res) < 0) {
perror("ioctl");
exit(1);
}
if (!res) printf("-");
printf("bidir\n");
} else {
if (!strcmp(argv[2],"bidir")) {
res = 1;
} else if (!strcmp(argv[2],"-bidir")) {
res = 0;
} else {
usage(argv[0]);
}
if (ioctl(fd, TIOCMSBIDIR, &res) < 0) {
perror("ioctl");
exit(1);
}
}
close(fd);
}

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# @(#)Makefile 1.1 (Julian Elischer) 3/28/93
#
#
PROG= fdisk
SRCS= fdisk.c
MAN8= fdisk.0
.include <bsd.prog.mk>

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.Dd April 4, 1993
.Dt FDISK 8
.\".Os BSD 4
.Sh NAME
.Nm fdisk
.Nd DOS partition maintainance program
.Sh SYNOPSIS
.Nm
.Op Fl i
.Op Fl u
.Bl -tag -width time
.It Fl i
Initializes sector 0 of the disk.
.It Fl u
Is used for updating (editing) sector 0 of the disk.
.El
.Sh PROLOGUE
In order for the BIOS to boot the kernel,
certain conventions must be adhered to.
Sector 0 of the disk must contain boot code,
a partition table,
and a magic number.
BIOS partitions can be used to break the disk up into several pieces.
The BIOS brings in sector 0
(does it really use the code?)
and verifies the magic number.
It then searches the 4 BIOS partitions described by sector 0
to determine which of them is
.Em active.
This boot then brings in the secondary boot block from the
.Em active
partition and runs it.
Under DOS,
you could have one or more partitions with one
.Em active.
The DOS
.Nm
program can be used to divide space on the disk into partitions and set one
.Em active.
.Sh DESCRIPTION
The 386bsd program
.Nm
serves a similar purpose to the DOS program.
When called with no arguments, it prints the sector 0 partition table.
An example follows:
.Bd -literal
******* Working on device /dev/rwd0d *******
parameters extracted from in-core disklabel are:
cylinders=769 heads=15 sectors/track=33 (495 blks/cyl)
parameters to be used for BIOS calculations are:
cylinders=769 heads=15 sectors/track=33 (495 blks/cyl)
Warning: BIOS sector numbering starts with sector 1
Information from DOS bootblock is:
The data for partition 0 is:
sysid 165,(386BSD)
start 495, size 380160 (185 Meg), flag 0
beg: cyl 1/ sector 1/ head 0;
end: cyl 768/ sector 33/ head 14
The data for partition 1 is:
sysid 164,(unknown)
start 378180, size 2475 (1 Meg), flag 0
beg: cyl 764/ sector 1/ head 0;
end: cyl 768/ sector 33/ head 14
The data for partition 2 is:
<UNUSED>
The data for partition 3 is:
sysid 99,(ISC UNIX, other System V/386, GNU HURD or Mach)
start 380656, size 224234 (109 Meg), flag 80
beg: cyl 769/ sector 2/ head 0;
end: cyl 197/ sector 33/ head 14
.Ed
.Pp
The disk is divided into three parititions that happen to fill the disk.
The second partition overlaps the end of the first.
(Used for debugging purposes)
.Bl -tag -width "cyl, sector and head"
.It Em "sysid"
is used to label the partition. 386bsd reserves the
magic number 165 decimal (A5 in hex).
.It Em "start and size"
fields provide the start address
and size of a parition in sectors.
.It Em "flag 80"
specifies that this is the active partition.
.It Em "cyl, sector and head"
fields are used to specify the beginning address
and end address for the parititon.
.It Em "Note:"
these numbers are calculated using BIOS's understanding of the disk geometry
and saved in the bootblock.
.El
.Pp
The flags
.Fl i
or
.Fl u
are used to indicate that the paritition data is to be updated.
The
.Nm
program will enter a conversational mode.
This mode is designed not to change any data unless you explicitly tell it to.
.Nm
selects defaults for its questions to guarantee the above behaviour.
.Pp
It displays each partition
and ask if you want to edit it.
If you say yes,
it will step through each field showing the old value
and asking for a new one.
When you are done with a partition,
.Nm
will display it and ask if it is correct.
.Nm
will then procede to the next entry.
.Pp
Getting the
.Em cyl, sector,
and
.Em head
fields correct is tricky.
So by default,
they will be calculated for you;
you can specify them if you choose.
.Pp
After all the partitions are processed,
you are given the option to change the
.Em active
partition.
Finally,
when the all the data for the first sector has been accumulated,
you are asked if you really want to rewrite sector 0.
Only if you answer yes,
will the data be written to disk.
.Pp
The difference between the
.Fl u
flag and
.Fl i
flag is that
the
.Fl u
flag just edits the fields as they appear on the disk.
While the
.Fl i
flag is used to "initialize" sector 0;
it will setup the last BIOS partition to use the whole disk for 386bsd;
and make it active.
.Sh NOTES
.Pp
The automatic calculation of starting cylinder etc. uses
a set of figures that represent what the BIOS thinks is the
geometry of the drive.
These figures are by default taken from the incore disklabel,
but the program initially gives you an oportunity to change them.
This allows the user to create a bootblock that can work with drives
that use geometry translation under the BIOS.
.Pp
If you hand craft your disk layout,
please make sure that the 386bsd partition starts on a cylinder boundary.
A number of decisions made later may assume this.
(This might not be necessary later.)
.Pp
Editing an existing partition will most likely cause you to
lose all the data in that partition.
.Pp
You should run this program interactively once or twice to see how it works.
This is completely safe as long as you answer the last question in the negative.
There are subtleties
that the program detects
that are not fully explained in this manual page.
.Sh SEE ALSO
.Xr disklabel 8
.Sh BUGS
One less now, but probably more

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/*
* 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");
}

6
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# @(#)Makefile 5.4 (Berkeley) 6/5/91
PROG= comcontrol
NOMAN= noman
.include <bsd.prog.mk>

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/*-
* Copyright (c) 1992 Christopher G. Demetriou
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote
* products derived from this software without specific written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/* comcontrol.c */
#include <sys/types.h>
#include <sys/ioctl.h>
#include <stdio.h>
#include <fcntl.h>
void usage(char *progname)
{
fprintf(stderr, "usage: %s <filename> [[-]bidir]\n", progname);
exit(1);
}
int main(int argc, char *argv[])
{
int fd;
int res;
if ((argc < 2) || (argc > 3)) usage(argv[0]);
fd = open(argv[1], O_RDONLY|O_NONBLOCK, 0);
if (fd < 0) {
fprintf(stderr, "%s: couldn't open file %s\n", argv[0], argv[1]);
perror("open");
exit(1);
}
if (argc == 2) {
if (ioctl(fd, TIOCMGBIDIR, &res) < 0) {
perror("ioctl");
exit(1);
}
if (!res) printf("-");
printf("bidir\n");
} else {
if (!strcmp(argv[2],"bidir")) {
res = 1;
} else if (!strcmp(argv[2],"-bidir")) {
res = 0;
} else {
usage(argv[0]);
}
if (ioctl(fd, TIOCMSBIDIR, &res) < 0) {
perror("ioctl");
exit(1);
}
}
close(fd);
}

9
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# @(#)Makefile 1.1 (Julian Elischer) 3/28/93
#
#
PROG= fdisk
SRCS= fdisk.c
MAN8= fdisk.0
.include <bsd.prog.mk>

177
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.Dd April 4, 1993
.Dt FDISK 8
.\".Os BSD 4
.Sh NAME
.Nm fdisk
.Nd DOS partition maintainance program
.Sh SYNOPSIS
.Nm
.Op Fl i
.Op Fl u
.Bl -tag -width time
.It Fl i
Initializes sector 0 of the disk.
.It Fl u
Is used for updating (editing) sector 0 of the disk.
.El
.Sh PROLOGUE
In order for the BIOS to boot the kernel,
certain conventions must be adhered to.
Sector 0 of the disk must contain boot code,
a partition table,
and a magic number.
BIOS partitions can be used to break the disk up into several pieces.
The BIOS brings in sector 0
(does it really use the code?)
and verifies the magic number.
It then searches the 4 BIOS partitions described by sector 0
to determine which of them is
.Em active.
This boot then brings in the secondary boot block from the
.Em active
partition and runs it.
Under DOS,
you could have one or more partitions with one
.Em active.
The DOS
.Nm
program can be used to divide space on the disk into partitions and set one
.Em active.
.Sh DESCRIPTION
The 386bsd program
.Nm
serves a similar purpose to the DOS program.
When called with no arguments, it prints the sector 0 partition table.
An example follows:
.Bd -literal
******* Working on device /dev/rwd0d *******
parameters extracted from in-core disklabel are:
cylinders=769 heads=15 sectors/track=33 (495 blks/cyl)
parameters to be used for BIOS calculations are:
cylinders=769 heads=15 sectors/track=33 (495 blks/cyl)
Warning: BIOS sector numbering starts with sector 1
Information from DOS bootblock is:
The data for partition 0 is:
sysid 165,(386BSD)
start 495, size 380160 (185 Meg), flag 0
beg: cyl 1/ sector 1/ head 0;
end: cyl 768/ sector 33/ head 14
The data for partition 1 is:
sysid 164,(unknown)
start 378180, size 2475 (1 Meg), flag 0
beg: cyl 764/ sector 1/ head 0;
end: cyl 768/ sector 33/ head 14
The data for partition 2 is:
<UNUSED>
The data for partition 3 is:
sysid 99,(ISC UNIX, other System V/386, GNU HURD or Mach)
start 380656, size 224234 (109 Meg), flag 80
beg: cyl 769/ sector 2/ head 0;
end: cyl 197/ sector 33/ head 14
.Ed
.Pp
The disk is divided into three parititions that happen to fill the disk.
The second partition overlaps the end of the first.
(Used for debugging purposes)
.Bl -tag -width "cyl, sector and head"
.It Em "sysid"
is used to label the partition. 386bsd reserves the
magic number 165 decimal (A5 in hex).
.It Em "start and size"
fields provide the start address
and size of a parition in sectors.
.It Em "flag 80"
specifies that this is the active partition.
.It Em "cyl, sector and head"
fields are used to specify the beginning address
and end address for the parititon.
.It Em "Note:"
these numbers are calculated using BIOS's understanding of the disk geometry
and saved in the bootblock.
.El
.Pp
The flags
.Fl i
or
.Fl u
are used to indicate that the paritition data is to be updated.
The
.Nm
program will enter a conversational mode.
This mode is designed not to change any data unless you explicitly tell it to.
.Nm
selects defaults for its questions to guarantee the above behaviour.
.Pp
It displays each partition
and ask if you want to edit it.
If you say yes,
it will step through each field showing the old value
and asking for a new one.
When you are done with a partition,
.Nm
will display it and ask if it is correct.
.Nm
will then procede to the next entry.
.Pp
Getting the
.Em cyl, sector,
and
.Em head
fields correct is tricky.
So by default,
they will be calculated for you;
you can specify them if you choose.
.Pp
After all the partitions are processed,
you are given the option to change the
.Em active
partition.
Finally,
when the all the data for the first sector has been accumulated,
you are asked if you really want to rewrite sector 0.
Only if you answer yes,
will the data be written to disk.
.Pp
The difference between the
.Fl u
flag and
.Fl i
flag is that
the
.Fl u
flag just edits the fields as they appear on the disk.
While the
.Fl i
flag is used to "initialize" sector 0;
it will setup the last BIOS partition to use the whole disk for 386bsd;
and make it active.
.Sh NOTES
.Pp
The automatic calculation of starting cylinder etc. uses
a set of figures that represent what the BIOS thinks is the
geometry of the drive.
These figures are by default taken from the incore disklabel,
but the program initially gives you an oportunity to change them.
This allows the user to create a bootblock that can work with drives
that use geometry translation under the BIOS.
.Pp
If you hand craft your disk layout,
please make sure that the 386bsd partition starts on a cylinder boundary.
A number of decisions made later may assume this.
(This might not be necessary later.)
.Pp
Editing an existing partition will most likely cause you to
lose all the data in that partition.
.Pp
You should run this program interactively once or twice to see how it works.
This is completely safe as long as you answer the last question in the negative.
There are subtleties
that the program detects
that are not fully explained in this manual page.
.Sh SEE ALSO
.Xr disklabel 8
.Sh BUGS
One less now, but probably more

686
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/*
* 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");
}