code: plan9front

ref: 5a50a0df165c237503a922a7496c37690c9d4d0b
dir: /acme/bin/Battery/

View raw version 
#!/bin/rc

if(! test -f /mnt/apm/battery){
	echo no apm >[1=2]
	exit 'no apm'
}

cd /mnt/acme/new
echo name /dev/apm >ctl
echo dump Battery >ctl

awkscript='
NR==1 {
	if($3 != -1)
		printf("%d%% %d:%02d %s", $2, $3/3600, ($3/60)%60, $1);
	else
		printf("%d%% %s", $2, $1);
}
'

fn chk {
	what=`{awk $awkscript /mnt/apm/battery}
	echo cleartag >ctl || exit die
	echo clean >ctl || exit die
	echo ' '^$"what >tag || exit die
}

chk
while(sleep 60)
	chk