1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
|
#!/bin/sh
# adjust brightness of the OLPC XO backlight
usage()
{
echo "usage: ${0##*/} [up|down|max|min|<0-15>]"
exit 1;
}
LEVEL=/sys/class/backlight/dcon-bl/brightness
MONOMODE=/sys/devices/platform/dcon/output
read curbright < $LEVEL
case $1 in
"") # no argument, just report current value
echo $curbright
exit
;;
max|high)
newbright=15
;;
min|low)
newbright=0
;;
up)
newbright=$(($curbright + 1))
newbright=$(( ( $newbright > 15 ) ? 15 : $newbright ))
;;
down)
newbright=$(($curbright - 1))
newbright=$(( ( $newbright < 0 ) ? 0 : $newbright ))
;;
[0-9]|1[0-5])
newbright=$1
;;
*)
usage
;;
esac
monochrome=$(( newbright == 0 ))
# POWEREVENTS=/var/run/powerevents
# echo "brightness $newbright $monochrome" > $POWEREVENTS
echo $newbright >$LEVEL
echo $monochrome >$MONOMODE
|
