Messages in this thread | | | Date | Thu, 31 Mar 2011 12:57:06 -0700 | From | Randy Dunlap <> | Subject | Re: signal to PID 1 from serial console like KeyboardRequest or CAD |
| |
On Fri, 25 Mar 2011 13:41:40 -0400 Jeremy Jackson wrote:
> Hi, > > Sent to linux-console with no reply for over a week... > > I ran into a problem recently on a Linux server with a remote serial > console. /sbin/init (actually Upstart) was in a state where nothing > (useful) was running. I had to power cycle the machine to get back to > the boot prompt. This has the side-effect of triggering raid rebuilds. > > It would be nice to have what Ctrl-Alt-Del does at the VGA console with > PS/2 or USB keyboard. This sends a SIGINT to PID 1, and most distros > have this set to do "shutdown -r now" which attempts a clean reboot.
so C_A_D works at console via PS/2 or USB keyboard, but not on a remote serial console? Could it be an issue with whatever remote/serial software you are using?
> Once upon a time there was KeyboardRequest, which would send a SIGWINCH > to PID 1 (when pressing Alt-UP_arrow?). I don't see any sign of this > feature in Linux 2.6.32 though.
I couldn't find it in 2.4.37 either.
Can 'loadkeys' help you any?
> Looking at the Sysrq handlers in the kernel I don't see any keystrokes > that send SIGINT to PID 1 either. > > So, I'm wondering if it makes sense to add a Sysrq key to send a signal > to PID1 ?
Dmitry, any ideas?
--- ~Randy *** Remember to use Documentation/SubmitChecklist when testing your code ***
| |