The only thing I can think of that can affect this is if you are running in a PID namespace (container) - if you are, you may receive SIGHUP instead. This may have some helpful info on your quest - it talks about what signals are sent under what conditions, and what can affect them:
http://man7.org/linux/man-pages/man2/reboot.2.html
Hope something here helps!
On Thursday, Jun 11, 2015 at 5:34 PM, Steve Litt <slitt_at_troubleshooters.com>, wrote:
On Thu, 11 Jun 2015 10:04:13 -0700 (PDT)
"Robert Hencke" <robert.hencke_at_gmail.com> wrote:
> On Thu, Jun 11, 2015 at 12:59 PM, Steve Litt
> <slitt_at_troubleshooters.com> wrote:
>
> > Hi all,
> > What interrupt does Ctrl+Alt+Delete send PID1?
> > Google just tells how to tweak /etc/inittab to react to
> > Ctrl+Alt+Del, but in my case /etc/inittab isn't being used: I need
> > to react to the specific interrupt.
> > Thanks,
> > SteveT
> > Steve Litt
> > June 2015 featured book: The Key to Everyday Excellence
> > http://www.troubleshooters.com/key
> I believe this is SIGINT.
>
Thanks Robert,
I have a feeling that SIGINT isn't getting all the way to PID1. When I
do the following:
kill -s SIGINT 1
It runs rc.shutdown with the argument "reboot" and reboots the system,
just like it's supposed to. But when I press Ctrl+Alt+Del at a virtual
terminal, it doesn't. That makes me suspect that either Ctrl+Alt+Del is
sending a different interrupt to PID 1, or the SIGINT it's sending
isn't getting to PID 1.
I'll try to research if further.
Thanks again,
SteveT
Steve Litt
June 2015 featured book: The Key to Everyday Excellence
http://www.troubleshooters.com/key
Received on Thu Jun 11 2015 - 22:56:01 UTC