How to run program/script as late in the shutdown process as possible?

lordalgar · 07-08-2014, 04:33 AM

How can I run a program/script as late in the shutdown process as possible? (Only when I poweroff, not on reboot etc.)

I need to run a script or program as late in the shutdown process as possible. I have tried /etc/rc0.d but it's run far to soon. I used:
sudo update-rc.d dmpsustop stop 00 0

Is there any other way (writing drivers, other tools, recompile kernel?)

I'm not very experianced in Linux s

bigrigdriver · 07-08-2014, 11:05 AM

The scripts in /etc/rc0.d are run to prepare the system for bootup; rc1.d to get to runlevel 1, rc2.d to get to runlevel 2, and so on. The scripts to shutdown services to prepare for reboot should go in rc6.d.

Read the readme files in /etc rc6.d and /etc/init.d for more information.

jefro · 07-08-2014, 04:00 PM

May have to put in some timers or waits to let stuff settle down.

lordalgar · 07-08-2014, 07:41 PM

According to this page: http://www.linux.com/news/enterprise...nd-rcd-scripts

rc0.d should be used when poweroff. My problem is that my script is running to late in the shutdown (poweroff) process.

jefro: How can I wait for things to settle down, any special process or signal I can wait for?

michaelk · 07-08-2014, 10:11 PM

What distribution/version are you running?

By running the update-rc.d as posted a link should of been created in the rc0.d directory like K00dmpsustop.

When a runlevel is entered all the process with KXXs are run first Then the SXX scripts are run. The difference between K and S is the Ks will be invoked with a stop parameter and S the start parameter.

So in reality K00 should be the first script that runs when the shutdown process starts. If your script is written like a standard init process then it might not be running at all. Without knowing anything about your script or what services it might be required to run we really do not know where in the shutdown process it should be executed.

lordalgar · 07-09-2014, 12:16 AM

Hi, I'm running Raspian an Debian fork.

You are right a link is created called K01dmpsustop

This is run when shutdown (poweroff), but it's run to early. The script look like this:

Code:

#! /bin/sh
### BEGIN INIT INFO
# Provides:          dmpsustop
# Required-Start:
# Required-Stop:
# Default-Start:
# Default-Stop:      0
# Short-Description: 
# Description:
### END INIT INFO

PATH=/sbin:/usr/sbin:/bin:/usr/bin:/usr/local/bin

. /lib/lsb/init-functions

do_stop () {
        log_action_msg "------------///////////////\\\\\\\\\\\\\\\----------">&2
	log_action_msg "---- Shut down  ----">&2
}

case "$1" in
  start)
	# No-op
	;;
  restart|reload|force-reload)
	echo "Error: argument '$1' not supported" >&2
	exit 3
	;;
  stop)
	do_stop
	;;
  *)
	echo "Usage: $0 stop" >&2
	exit 3
	;;
esac

pan64 · 07-09-2014, 12:27 AM

so try rename it to K99dmpsustop