22 lines
657 B
Bash
22 lines
657 B
Bash
#!/bin/bash
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# Fade the screen and wait. Needs xbacklight.
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# When receiving SIGHUP, stop fading and set backlight to original brightness.
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# When receiving SIGTERM, wait a bit, and set backlight to original brightness
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# (this prevents the screen from flashing before it is turned completely off
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# by DPMS in the locker command).
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min_brightness=30
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fade_time=2000
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fade_steps=70
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BRIGHTNESS=$(xbacklight -get)
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trap "xbacklight -set $BRIGHTNESS" EXIT
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trap 'kill %%; exit 0' HUP
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trap 'sleep 1s; kill %%; exit 0' TERM
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xbacklight -time $fade_time -steps $fade_steps -set $min_brightness &
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wait
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sleep infinity & # No, sleeping in the foreground does not work
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wait
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