39 lines
1.1 KiB
Bash
39 lines
1.1 KiB
Bash
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#!/bin/bash
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# add this to /etc/inittab
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# P1:2345:respawn:/root/lockbutton.sh
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PATH=/bin:/usr/bin:/usr/local/bin
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logger -t $(basename $0) "starting..."
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gpio -g mode 11 in # this is usually SCLK as ALT0
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# transform into GPIO11 as IN
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gpio -g mode 11 up # set internal pullup
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while true
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do
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logger -t $(basename $0) "change detected (was $state)"
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if [ $(gpio -g read 11) -eq 1 ] && [ "$state" != "pushed" ]
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then
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for plugin in "$0".d/*
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do
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"$plugin" pushed
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logger -t $(basename $0) "called '$plugin pushed' with ret=$?"
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done
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state="pushed"
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else
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if [ "$state" != "released" ]
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then
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for plugin in "$0".d/*
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do
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"$plugin" released
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logger -t $(basename $0) "called '$plugin released' with ret=$?"
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done
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state="released"
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fi
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fi
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if ( [ $(gpio -g read 11) -eq 1 ] && [ "$state" = "released" ] ) ||
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( [ $(gpio -g read 11) -eq 0 ] && [ "$state" = "pushed" ] )
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then
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logger -t $(basename $0) "inconsistent state $state, aborting"
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break
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fi
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gpio -g wfi 11 both # wait for change (uses no cpu, but interrupt)
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done
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