[7276] in bugtraq
Re: Regarding Mudge's OBP/FORTH root hack (PHRACK53)
daemon@ATHENA.MIT.EDU (Eric Johnson)
Wed Jul 15 13:43:30 1998
Date: Wed, 15 Jul 1998 10:51:01 -0400
Reply-To: Eric.Johnson@Central.Sun.COM
From: Eric Johnson <Eric.Johnson@CENTRAL.SUN.COM>
To: BUGTRAQ@NETSPACE.ORG
In-Reply-To: "Your message with ID" <199807140850.JAA08997@clem>
> If you want to actually stop the break being sent at all then under
> Solaris 2.6 you can do this by running: `kbd -a disable`
[snip]
The following program, written by a colleague who wishes to remain
anonymous, lets one toggle between Stop-A enabled/disabled. It has
been tested under Solaris 2.5 and SunOS 4.1.4. I thought the list
might find it interesting.
--Eric Johnson
/*
* Do not distribute this file without this disclaimer.
*
* The contents of this file are intended to be read as an example.
* This is not a supported product of Sun Microsystems and no hotline
* calls will be accepted which directly relate to this information.
*
* NO LIABILITY WILL BE ACCEPTED BY SUN MICROSYSTEMS FOR ANY LOSS (DIRECT
* OR CONSEQUENTIAL) INCURRED IN ANY WAY BY ANY PARTY THROUGH THE USE OF
* THIS INFORMATION.
*
* NO WARRANTY OF ANY SORT IS IMPLIED OR GIVEN FOR ANY CODE DERIVED
* FROM THIS INFORMATION.
*
* Warning!!
*
* If L1-A and BREAK are both disabled:
*
* - It is impossible to sync the machine should it soft-hang.
* - You could lose data.
* - It is difficult to generate a crash dump for analysis.
*
* - It will be very difficult to distinguish between a soft hang and a
* hard hang for diagnostic purposes.
*
*
*/
#include <sys/types.h>
#include <sys/ioctl.h>
#include <sundev/kbd.h>
#include <sundev/kbio.h>
main(argc, argv)
int argc;
char *argv[];
{
struct kiockey key;
int fd;
int mode;
char *c;
if (argc != 2) {
printf("\nUSAGE: abort_key y|n \n\n");
exit(1);
}
switch (*(c= argv[1])) {
case 'y':
mode = 1;
break;
case 'n':
mode = 0;
break;
default:
printf("\nINVALID ARGUMENT\n");
printf("USAGE: abort_key y|n \n\n");
exit(1);
}
fd = open("/dev/kbd", 1);
if (fd < 0) {
perror("OPEN");
exit(1);
}
key.kio_tablemask = KIOCABORT1;
ioctl( fd, KIOCGETKEY, &key); /* read abort key entry */
if (key.kio_station == 0)
printf("L1-A reset sequence was disabled\n");
else if (key.kio_station == 1)
printf("L1-A reset sequence was enabled\n");
if (mode == 1)
key.kio_station = 1;
else
key.kio_station = 0;
ioctl(fd, KIOCSETKEY, &key); /* map it t a 'hole' in map */
if (key.kio_station == 0)
printf("L1-A reset sequence now disabled\n");
else if (key.kio_station == 1)
printf("L1-A reset sequence now enabled\n");
}
