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Add a -b option as a simple way to rewrite the mbr code

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(eg. replacing a boot manager with a standard mbr)
This commit is contained in:
Robert Nordier 1999-01-22 11:54:17 +00:00
parent 7bb42db9e7
commit 12d910e9bb
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=43054
4 changed files with 54 additions and 8 deletions
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6
sbin/fdisk/fdisk.8
View File

@ -9,6 +9,7 @@
.Op Fl i
.Op Fl u
.Op Fl a
.Op Fl b
.Op Fl 1234
.Op Ar disk
.Bl -tag -width time
@ -67,6 +68,11 @@ is given.
Change the active partition only. Ignored if
.Fl f
is given.
.It Fl b
Reinitialize the boot code contained in sector 0 of the disk. Ignored
if
.Fl f
is given.
.It Fl 1234
Operate on a single fdisk entry only. Ignored if
.Fl f

25
sbin/fdisk/fdisk.c
View File

@ -26,7 +26,7 @@
#ifndef lint
static const char rcsid[] =
"$Id: fdisk.c,v 1.26 1998/11/06 03:43:21 alex Exp $";
"$Id: fdisk.c,v 1.27 1998/11/26 12:24:35 joerg Exp $";
#endif /* not lint */
#include <sys/disklabel.h>
@ -118,6 +118,7 @@ typedef struct cmd {
static int a_flag = 0; /* set active partition */
static int b_flag = 0; /* replace boot code */
static int i_flag = 0; /* replace partition data */
static int u_flag = 0; /* update partition data */
static int t_flag = 0; /* test only, if f_flag is given */
@ -220,6 +221,7 @@ static void init_boot(void);
static void change_part(int i);
static void print_params();
static void change_active(int which);
static void change_code();
static void get_params_to_use();
static void dos(int sec, int size, unsigned char *c, unsigned char *s,
unsigned char *h);
@ -267,6 +269,9 @@ main(int argc, char *argv[])
case 'a':
a_flag = 1;
break;
case 'b':
b_flag = 1;
break;
case 'f':
if (*token)
{
@ -380,7 +385,10 @@ main(int argc, char *argv[])
if (u_flag || a_flag)
change_active(partition);
if (u_flag || a_flag) {
if (b_flag)
change_code();
if (u_flag || a_flag || b_flag) {
if (!t_flag)
{
printf("\nWe haven't changed the partition table yet. ");
@ -406,7 +414,7 @@ static void
usage()
{
fprintf(stderr,
"usage: fdisk {-a|-i|-u} [-f <config file> [-t] [-v]] [-{1,2,3,4}] [disk]\n");
"usage: fdisk {-a|-b|-i|-u} [-f configfile [-t] [-v]] [-{1,2,3,4}] [disk]\n");
exit(1);
}
@ -587,6 +595,14 @@ struct dos_partition *partp = ((struct dos_partition *) &mboot.parts);
partp[active-1].dp_flag = ACTIVE;
}
static void
change_code()
{
if (ok("Do you want to change the boot code?"))
init_boot();
}
void
get_params_to_use()
{
@ -649,7 +665,8 @@ struct stat st;
}
if ( !(st.st_mode & S_IFCHR) )
warnx("device %s is not character special", disk);
if ((fd = open(disk, a_flag || u_flag ? O_RDWR : O_RDONLY)) == -1) {
if ((fd = open(disk,
a_flag || b_flag || u_flag ? O_RDWR : O_RDONLY)) == -1) {
if(errno == ENXIO)
return -2;
warnx("can't open device %s", disk);

6
sbin/i386/fdisk/fdisk.8
View File

@ -9,6 +9,7 @@
.Op Fl i
.Op Fl u
.Op Fl a
.Op Fl b
.Op Fl 1234
.Op Ar disk
.Bl -tag -width time
@ -67,6 +68,11 @@ is given.
Change the active partition only. Ignored if
.Fl f
is given.
.It Fl b
Reinitialize the boot code contained in sector 0 of the disk. Ignored
if
.Fl f
is given.
.It Fl 1234
Operate on a single fdisk entry only. Ignored if
.Fl f

25
sbin/i386/fdisk/fdisk.c
View File

@ -26,7 +26,7 @@
#ifndef lint
static const char rcsid[] =
"$Id: fdisk.c,v 1.26 1998/11/06 03:43:21 alex Exp $";
"$Id: fdisk.c,v 1.27 1998/11/26 12:24:35 joerg Exp $";
#endif /* not lint */
#include <sys/disklabel.h>
@ -118,6 +118,7 @@ typedef struct cmd {
static int a_flag = 0; /* set active partition */
static int b_flag = 0; /* replace boot code */
static int i_flag = 0; /* replace partition data */
static int u_flag = 0; /* update partition data */
static int t_flag = 0; /* test only, if f_flag is given */
@ -220,6 +221,7 @@ static void init_boot(void);
static void change_part(int i);
static void print_params();
static void change_active(int which);
static void change_code();
static void get_params_to_use();
static void dos(int sec, int size, unsigned char *c, unsigned char *s,
unsigned char *h);
@ -267,6 +269,9 @@ main(int argc, char *argv[])
case 'a':
a_flag = 1;
break;
case 'b':
b_flag = 1;
break;
case 'f':
if (*token)
{
@ -380,7 +385,10 @@ main(int argc, char *argv[])
if (u_flag || a_flag)
change_active(partition);
if (u_flag || a_flag) {
if (b_flag)
change_code();
if (u_flag || a_flag || b_flag) {
if (!t_flag)
{
printf("\nWe haven't changed the partition table yet. ");
@ -406,7 +414,7 @@ static void
usage()
{
fprintf(stderr,
"usage: fdisk {-a|-i|-u} [-f <config file> [-t] [-v]] [-{1,2,3,4}] [disk]\n");
"usage: fdisk {-a|-b|-i|-u} [-f configfile [-t] [-v]] [-{1,2,3,4}] [disk]\n");
exit(1);
}
@ -587,6 +595,14 @@ struct dos_partition *partp = ((struct dos_partition *) &mboot.parts);
partp[active-1].dp_flag = ACTIVE;
}
static void
change_code()
{
if (ok("Do you want to change the boot code?"))
init_boot();
}
void
get_params_to_use()
{
@ -649,7 +665,8 @@ struct stat st;
}
if ( !(st.st_mode & S_IFCHR) )
warnx("device %s is not character special", disk);
if ((fd = open(disk, a_flag || u_flag ? O_RDWR : O_RDONLY)) == -1) {
if ((fd = open(disk,
a_flag || b_flag || u_flag ? O_RDWR : O_RDONLY)) == -1) {
if(errno == ENXIO)
return -2;
warnx("can't open device %s", disk);