Tzafrir Cohen wrote:
On Sun, Oct 12, 2008 at 09:56:00PM +0530, Bhasker C V wrote:
Hi,
I was trying to find out if there are any shutdown hooks.
What i mean by this is that i must be able to have some conditions met
before actual shutdown starts.
Eg:- Suppose there is a very important process running, the hook must
check this and if the hook returns non-zero, the system must
refuse a requested shutdown.
I can write a wrapper to /sbin/shutdown for doing this, but i am just
trying to find out if there is any method already available for doing
this ?
aptitude install molly-guard
From the man page:
molly-guard attempts to prevent you from accidentally shutting down or
rebooting machines. It does this by injecting a couple of checks before
the existing commands: halt, reboot, shutdown, and poweroff. This
happens via scripts with the same names in /usr/sbin, so it only works
if you have /usr/sbin before /sbin in your PATH!
Before molly-guard invokes the real command, all scripts in
/etc/molly-guard/run.d/ have to run and exit successfully; else, it
aborts the command. run-parts(1) is used to process the directory.
It is intended to prevent you from easily rebooting a remote server
(thinking it were your own). But I figure it can be easily adapted.
I learn something new every day.
Hugo
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