How to execute a scrip upon waking up from s3 sleep?

KarlF · 05-13-2022, 12:25 PM

Hi!

Does anyone know how to execute a script/program immediately after the computer wakes up from sleep with slackware?

Thanks.

Karl

giomat · 05-13-2022, 12:46 PM

You should have a look into elogind hook scripts.
https://wiki.gentoo.org/wiki/Elogind...ming.2Fthawing
You can setup scripts to be executed pre and post suspend/hibernation

0XBF · 05-13-2022, 12:47 PM

You can use elogind to handle that. Here's a quote from the loginctl man page:

Code:

[/usr]/lib[64]/elogind/system-sleep/, /etc/elogind/system-sleep/
           Immediately before entering system suspend and/or hibernation elogind will run all executables in [/usr]/lib[64]/elogind/system-sleep/ and /etc/elogind/system-sleep/ and pass two arguments to
           them. The first argument will be "pre", the second either "suspend", "hibernate", "hybrid-sleep", or "suspend-then-hibernate", depending on the chosen action. Immediately after leaving system
           suspend and/or hibernation the same executables are run, but the first argument is now "post". All executables in this directory are executed sequentially, and execution of the action is not
           continued until all executables have finished.

So you could make a script that resides in /lib64/elogind/system-sleep/ and detect when "$1" = "post" to hook a script after resuming from sleep.

Edit: Looks like I was a minute too slow, but I'll leave my reply up

teckk · 05-13-2022, 01:09 PM

You can also put the machine to sleep with rtcwake, wake it when you want, do something, go back to sleep. Good for an overnight tv show record.

Example:

Code:

#!/usr/bin/bash

#change dir
cd $HOME/some/where

#Set wake date/time here, sleep
rtcwake -m mem --date "2022-05-14 18:55:00

#Do something here
echo "Hello world"
sleep 10

#Return to sleep
systemctl suspend

Slack doesn't use systemd so, use what Slack uses.

KarlF · 05-13-2022, 01:26 PM

Quote:

Originally Posted by 0XBF

You can use elogind to handle that. Here's a quote from the loginctl man page:

Code:

[/usr]/lib[64]/elogind/system-sleep/, /etc/elogind/system-sleep/
           Immediately before entering system suspend and/or hibernation elogind will run all executables in [/usr]/lib[64]/elogind/system-sleep/ and /etc/elogind/system-sleep/ and pass two arguments to
           them. The first argument will be "pre", the second either "suspend", "hibernate", "hybrid-sleep", or "suspend-then-hibernate", depending on the chosen action. Immediately after leaving system
           suspend and/or hibernation the same executables are run, but the first argument is now "post". All executables in this directory are executed sequentially, and execution of the action is not
           continued until all executables have finished.

So you could make a script that resides in /lib64/elogind/system-sleep/ and detect when "$1" = "post" to hook a script after resuming from sleep.

Edit: Looks like I was a minute too slow, but I'll leave my reply up

Thank you all for replying. This is exactly what I was looking for!
The reason was that I noticed that after waking up, I needed to execute hdparm -S 60 /dev/sd[bcd] on my raid array again, otherwise the disks would not spin down.

Thanks again!

Karl