424 lines
8.7 KiB
C
424 lines
8.7 KiB
C
/* $NetBSD: edlabel.c,v 1.2 1996/01/30 18:34:07 thorpej Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 1995 Gordon W. Ross
|
|
* 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 prior written permission.
|
|
* 4. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by Gordon W. Ross
|
|
*
|
|
* 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 AUTHOR 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.
|
|
*/
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/ioctl.h>
|
|
#include <sys/disklabel.h>
|
|
|
|
#include <fcntl.h>
|
|
#include <stdio.h>
|
|
#include <ctype.h>
|
|
|
|
/*
|
|
* This is a data-driven program
|
|
*/
|
|
struct field {
|
|
char *f_name;
|
|
int f_offset;
|
|
int f_type; /* 1:char, 2:short, 4:int, >4:string */
|
|
};
|
|
|
|
/* Table describing fields in the head of a disklabel. */
|
|
#define dloff(f) (int)(&((struct disklabel *)0)->f)
|
|
struct field label_head[] = {
|
|
{ " type_num", dloff(d_type), 2 },
|
|
{ " sub_type", dloff(d_subtype), 2 },
|
|
{ " type_name", dloff(d_typename), 16 },
|
|
{ " pack_name", dloff(d_packname), 16 },
|
|
{ " bytes/sector", dloff(d_secsize), 4 },
|
|
{ " sectors/track", dloff(d_nsectors), 4 },
|
|
{ " tracks/cylinder", dloff(d_ntracks), 4 },
|
|
{ " cylinders", dloff(d_ncylinders), 4 },
|
|
{ "sectors/cylinder", dloff(d_secpercyl), 4 },
|
|
/* Don't care about the others until later... */
|
|
0,
|
|
};
|
|
#undef dloff
|
|
|
|
char tmpbuf[64];
|
|
|
|
void
|
|
edit_head_field(v, f, modify)
|
|
void *v;
|
|
struct field *f;
|
|
int modify; /* also modify */
|
|
{
|
|
u_int8_t *cp;
|
|
u_int tmp;
|
|
|
|
cp = v;
|
|
cp += f->f_offset;
|
|
|
|
printf("%s: ", f->f_name);
|
|
|
|
/* Print current value... */
|
|
switch (f->f_type) {
|
|
case 1:
|
|
tmp = *cp;
|
|
printf("%d", tmp);
|
|
break;
|
|
case 2:
|
|
tmp = *((u_int16_t *)cp);
|
|
printf("%d", tmp);
|
|
break;
|
|
case 4:
|
|
tmp = *((u_int32_t *)cp);
|
|
printf("%d", tmp);
|
|
break;
|
|
|
|
default:
|
|
/* must be a string. */
|
|
strncpy(tmpbuf, (char*)cp, sizeof(tmpbuf));
|
|
printf("%s", tmpbuf);
|
|
break;
|
|
}
|
|
|
|
if (modify == 0) {
|
|
printf("\n");
|
|
return;
|
|
}
|
|
printf(" ? ");
|
|
fflush(stdout);
|
|
|
|
tmpbuf[0] = '\0';
|
|
if (fgets(tmpbuf, sizeof(tmpbuf), stdin) == NULL)
|
|
return;
|
|
if ((tmpbuf[0] == '\0') || (tmpbuf[0] == '\n')) {
|
|
/* no new value supplied. */
|
|
return;
|
|
}
|
|
|
|
/* store new value */
|
|
if (f->f_type <= 4)
|
|
if (sscanf(tmpbuf, "%d", &tmp) != 1)
|
|
return;
|
|
|
|
switch (f->f_type) {
|
|
case 1:
|
|
*cp = tmp;
|
|
break;
|
|
case 2:
|
|
*((u_int16_t *)cp) = tmp;
|
|
break;
|
|
case 4:
|
|
*((u_int32_t *)cp) = tmp;
|
|
break;
|
|
default:
|
|
/* Get rid of the trailing newline. */
|
|
tmp = strlen(tmpbuf);
|
|
if (tmp < 1)
|
|
break;
|
|
if (tmpbuf[tmp-1] == '\n')
|
|
tmpbuf[tmp-1] = '\0';
|
|
strncpy((char*)cp, tmpbuf, f->f_type);
|
|
break;
|
|
}
|
|
}
|
|
|
|
void
|
|
edit_head_all(d, modify)
|
|
struct disklabel *d;
|
|
int modify;
|
|
{
|
|
struct field *f;
|
|
|
|
/* Edit head stuff. */
|
|
for (f = label_head; f->f_name; f++)
|
|
edit_head_field(d, f, modify);
|
|
}
|
|
|
|
|
|
void
|
|
edit_partition(d, idx, modify)
|
|
struct disklabel *d;
|
|
int idx;
|
|
{
|
|
struct partition *p;
|
|
int start_cyl, cyls, trks, sects, tmp;
|
|
char letter;
|
|
|
|
if ((idx < 0) || (idx >= MAXPARTITIONS)) {
|
|
printf("bad partition index\n");
|
|
return;
|
|
}
|
|
|
|
p = &d->d_partitions[idx];
|
|
letter = 'a' + idx;
|
|
|
|
/* Print current value... */
|
|
start_cyl = p->p_offset / d->d_secpercyl;
|
|
printf("partition %c start cyl= %6d", letter, start_cyl);
|
|
if (p->p_offset % d->d_secpercyl) {
|
|
printf(" (bad start!)");
|
|
}
|
|
printf(", nblks= %9d ", p->p_size);
|
|
tmp = p->p_size;
|
|
sects = tmp % d->d_nsectors;
|
|
tmp /= d->d_nsectors;
|
|
trks = tmp % d->d_ntracks;
|
|
tmp /= d->d_ntracks;
|
|
cyls = tmp;
|
|
printf("(%d/%d/%d)\n", cyls, trks, sects);
|
|
|
|
if (modify == 0)
|
|
return;
|
|
|
|
/* Start cylinder: */
|
|
printf("partition %c start cyl: ", letter);
|
|
fflush(stdout);
|
|
if (fgets(tmpbuf, sizeof(tmpbuf), stdin) == NULL)
|
|
return;
|
|
if (sscanf(tmpbuf, "%d", &tmp) == 1)
|
|
p->p_offset = tmp * d->d_secpercyl;
|
|
|
|
/* number of blocks, or cyls/trks/sects */
|
|
printf("length as <nblks> or <cyls/trks/sects> : ");
|
|
fflush(stdout);
|
|
if (fgets(tmpbuf, sizeof(tmpbuf), stdin) == NULL)
|
|
return;
|
|
tmp = sscanf(tmpbuf, "%d/%d/%d", &cyls, &trks, §s);
|
|
if (tmp == 1)
|
|
p->p_size = cyls; /* really nblks! */
|
|
if (tmp == 3) {
|
|
tmp = cyls;
|
|
tmp *= d->d_ntracks;
|
|
tmp += trks;
|
|
tmp *= d->d_nsectors;
|
|
tmp += sects;
|
|
p->p_size = tmp;
|
|
}
|
|
}
|
|
|
|
/*****************************************************************/
|
|
|
|
void
|
|
check_divisors(d)
|
|
struct disklabel *d;
|
|
{
|
|
if (d->d_nsectors == 0) {
|
|
d->d_nsectors = 1;
|
|
printf("bad sect/trk, set to 1\n");
|
|
}
|
|
if (d->d_ntracks == 0) {
|
|
d->d_ntracks = 1;
|
|
printf("bad trks/cyl, set to 1\n");
|
|
}
|
|
if (d->d_ncylinders == 0) {
|
|
d->d_ncylinders = 1;
|
|
printf("bad cyls, set to 1\n");
|
|
}
|
|
if (d->d_secpercyl == 0) {
|
|
d->d_secpercyl = (d->d_nsectors * d->d_ntracks);
|
|
printf("bad sect/cyl, set to %d\n", d->d_secpercyl);
|
|
}
|
|
|
|
}
|
|
|
|
u_short
|
|
dkcksum(d)
|
|
struct disklabel *d;
|
|
{
|
|
u_short *start, *end;
|
|
u_short sum = 0;
|
|
|
|
start = (u_short *)d;
|
|
end = (u_short *)&d->d_partitions[d->d_npartitions];
|
|
while (start < end)
|
|
sum ^= *start++;
|
|
return (sum);
|
|
}
|
|
|
|
void
|
|
label_write(d, dn)
|
|
struct disklabel *d;
|
|
char *dn;
|
|
{
|
|
int fd;
|
|
|
|
d->d_magic = DISKMAGIC;
|
|
d->d_magic2 = DISKMAGIC;
|
|
d->d_checksum = 0;
|
|
d->d_checksum = dkcksum(d);
|
|
|
|
fd = open(dn, O_RDWR, 0);
|
|
if (fd < 0) {
|
|
perror(dn);
|
|
return;
|
|
}
|
|
if (ioctl(fd, DIOCWDINFO, d) < 0) {
|
|
perror("ioctl DIOCWDINFO");
|
|
}
|
|
close(fd);
|
|
}
|
|
|
|
void
|
|
label_read(dl, dn)
|
|
struct disklabel *dl;
|
|
char *dn;
|
|
{
|
|
int fd;
|
|
|
|
fd = open(dn, O_RDONLY, 0);
|
|
if (fd < 0) {
|
|
perror(dn);
|
|
exit(1);
|
|
}
|
|
if (ioctl(fd, DIOCGDINFO, dl) < 0) {
|
|
perror("ioctl DIOCGDINFO");
|
|
exit(1);
|
|
}
|
|
|
|
/* Make sure divisors are non-zero. */
|
|
check_divisors(dl);
|
|
|
|
close(fd);
|
|
}
|
|
|
|
/*****************************************************************/
|
|
|
|
void
|
|
label_print(dl, dn)
|
|
struct disklabel *dl;
|
|
char *dn;
|
|
{
|
|
struct field *f;
|
|
int i;
|
|
|
|
/* Print out head stuff. */
|
|
edit_head_all(dl, 0);
|
|
|
|
for (i = 0; i < 8; i++)
|
|
edit_partition(dl, i, 0);
|
|
}
|
|
|
|
char modify_cmds[] = "modify subcommands:\n\
|
|
@ : modify disk parameters\n\
|
|
a-h : modify partition\n\
|
|
q : quit this subcommand\n";
|
|
|
|
void
|
|
label_modify(dl, dn)
|
|
struct disklabel *dl;
|
|
char *dn;
|
|
{
|
|
int c;
|
|
|
|
printf(modify_cmds);
|
|
for (;;) {
|
|
printf("edlabel/modify> ");
|
|
fflush(stdout);
|
|
if (fgets(tmpbuf, sizeof(tmpbuf), stdin) == NULL)
|
|
break;
|
|
c = tmpbuf[0];
|
|
if ((c == '\0') || (c == '\n'))
|
|
continue; /* blank line */
|
|
if (c == 'q')
|
|
break;
|
|
if (c == '@') {
|
|
edit_head_all(dl, 1);
|
|
check_divisors(dl);
|
|
continue;
|
|
}
|
|
if ((c < 'a') || (c > 'q')) {
|
|
printf("bad input. ");
|
|
printf(modify_cmds);
|
|
continue;
|
|
}
|
|
edit_partition(dl, c - 'a', 1);
|
|
}
|
|
}
|
|
|
|
void
|
|
label_quit()
|
|
{
|
|
exit(0);
|
|
}
|
|
|
|
struct cmd {
|
|
void (*cmd_func)();
|
|
char *cmd_name;
|
|
char *cmd_descr;
|
|
} cmds[] = {
|
|
{ label_print, "print", "display the current disk label" },
|
|
{ label_modify, "modify", "prompt for changes to the label" },
|
|
{ label_write, "write", "write the new label to disk" },
|
|
{ label_quit, "quit", "terminate program" },
|
|
0,
|
|
};
|
|
|
|
void
|
|
menu()
|
|
{
|
|
struct cmd *cmd;
|
|
|
|
printf("edlabel menu:\n");
|
|
for (cmd = cmds; cmd->cmd_func; cmd++)
|
|
printf("%s\t- %s\n", cmd->cmd_name, cmd->cmd_descr);
|
|
}
|
|
|
|
main(argc, argv)
|
|
int argc;
|
|
char **argv;
|
|
{
|
|
struct disklabel dl;
|
|
struct cmd *cmd;
|
|
char *devname;
|
|
|
|
if (argc != 2) {
|
|
fprintf(stderr, "usage: edlabel RAWDISK\n");
|
|
exit(1);
|
|
}
|
|
devname = argv[1];
|
|
|
|
label_read(&dl, devname);
|
|
|
|
menu();
|
|
|
|
for (;;) {
|
|
printf("edlabel> ");
|
|
fflush(stdout);
|
|
if (fgets(tmpbuf, sizeof(tmpbuf), stdin) == NULL)
|
|
break;
|
|
for (cmd = cmds; cmd->cmd_func; cmd++)
|
|
if (cmd->cmd_name[0] == tmpbuf[0])
|
|
goto found;
|
|
printf("Invalid command. ");
|
|
menu();
|
|
continue;
|
|
|
|
found:
|
|
cmd->cmd_func(&dl, devname);
|
|
}
|
|
exit(0);
|
|
}
|
|
|