How do I check if the system is currently suspended?

Question

I want to use my orange pi power button to suspend and resume system and have some troubles with check state. So I wrote shell script for this but it won't work; it's only suspending.

When I click the button in suspend mode, the resumed and suspends again in a few seconds. I can't find a way to resume it.

It seems likely that systemctl is-system-running is returning running in the suspended state. My script is:

#!/bin/sh
VALID_P=`systemctl is-system-running`
echo $VALID_P
if [ "$VALID_P" = "running" ]; then
    systemctl suspend
else
    systemctl default
fi

If the system is suspended, would `systemctl` return anything, or even run? — Kusalananda, Jul 04 '17 at 15:20
when i executing "systemctl suspend" from suspended system, it awake system for a few sec and make it suspend again — Evgeniy Russkikh, Jul 04 '17 at 15:21
it is hardware button connected to GPIO of my Orange Pi that execute script above when pressed — Evgeniy Russkikh, Jul 04 '17 at 15:25
So, when you press the button, the system un-suspends, runs the script which finds out that the system is now not suspended, and then, because the system is not suspended, suspends it again. What's the question? — Kusalananda, Jul 04 '17 at 15:27
If the system is suspended, your script won't run. The system is suspended, it can't do anything. — terdon, Jul 04 '17 at 15:28
Kusalananda is complitely right. Press the button un-suspends system. Just checked with no actions at button (no script at all). Im suspends system through terminal and just clicked on button - system resumed. Hmmmm... how to make it suspend now lol :) — Evgeniy Russkikh, Jul 04 '17 at 15:41

score 2 · Accepted Answer · edited Oct 01 '17 at 12:06

2

In the end I used this script:

#!/bin/sh
file="/home/pi/loltest"
if [ -e "$file" ]
then
  rm /home/pi/loltest
else
  touch /home/pi/loltest
  systemctl suspend
fi

Works OK in armbian. I still have some problems with it in RetroArch or EmulationStation - they just hang after resume.

edited Oct 01 '17 at 12:06

Jeff Schaller

66,199
35
114
250

answered Jul 04 '17 at 19:28

Evgeniy Russkikh

41
5

How do I check if the system is currently suspended?

1 Answers1