Date: Wed, 21 May 2003 17:19:41 -0700 From: Joshua Oreman <oremanj@webserver.get-linux.org> To: Aaron Wohl <freebsd@soith.com> Cc: questions@freebsd.org Subject: Re: crashing fresbsd 5.1-current? Message-ID: <20030522001941.GD99691@webserver.get-linux.org> In-Reply-To: <20030521123927.34A262EEDF@www.fastmail.fm> References: <20030521123927.34A262EEDF@www.fastmail.fm>
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On Wed, May 21, 2003 at 06:39:27AM -0600 or thereabouts, Aaron Wohl seemed to write:
> How do I crash freebsd? I changed the dump* stuff in /etc/rc.conf. I
> want to make sure it works. I looked at man shutdown and man poweroff
> but I dont see a crash option. There should be some option to a system
> call you need to be root to do that internaly does panic("test crash") ?
Yep. man 2 reboot - especially RB_DUMP. It doesn't panic, but it dumps core.
Try this:
$ cat > crash.c <<EOF
#include <unistd.h>
#include <sys/reboot.h>
int main()
{
reboot (RB_DUMP | RB_AUTOBOOT);
return 255;
}
EOF
$ gcc -o crash crash.c
$ su
Password:
# ./crash
If you were a developer, and wanted to have a little more fun, you
could make a KLD that created a /dev/panic device. Then, something
like:
# echo "I wonder how big a security hole this is..." > /dev/panic
would panic with the specified message. See the Developer's Handbook.
-- Josh
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