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✅ Solution
Tags:
16.04
scripts
lock-screen
dbus
Link:
🔍 See Original Question on Ask Ubuntu ⧉ 🔗
URL:
https://askubuntu.com/q/858236
Title:
How do I call `dbus` code that monitors when screen is locked/unlocked?
ID:
/2016/12/08/How-do-I-call-_dbus_-code-that-monitors-when-screen-is-locked_unlocked_
Created:
December 8, 2016
Edited: April 13, 2017
Upload:
April 8, 2024
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I have a code snippet from (unix.stackexchange.com - Run script on screen lock / unlock) which I plan to modify because PulseAudio “undocumented feature” switches sound from TV to laptop when screen is locked.
The code is pretty straight forward:
dbus-monitor --session "type='signal',interface='com.ubuntu.Upstart0_6'" | \
(
while true; do
read X
if echo $X | grep "desktop-lock" &> /dev/null; then
SCREEN_LOCKED;
elif echo $X | grep "desktop-unlock" &> /dev/null; then
SCREEN_UNLOCKED;
fi
done
)
I can’t really say I understand the program / subroutine top-down flow or looping but someone from here commented there that it works and I trust his judgement.
The question is what are the naming conventions for my script? What is the industry standard directory to put the script in? How do I invoke it? ie Startup applications, rc.local, cron @reboot, etc. After invocation I trust it runs until the next reboot.
It will be running forever even if it’s only used every Wednesday Laundry night so ideally it shouldn’t hog too many CPU cycles.