Move screen device name to a global constant

diff --git a/bin/khatus_show b/bin/khatus_show
index d558264..dd59b14 100755 (executable)
--- a/bin/khatus_show
+++ b/bin/khatus_show
@@ -8,6 +8,7 @@ STATUS_FILE__WIFI=$STATUS_DIR/wifi
 STATUS_FILE__ENERGY_NOTIFIED_BELLOW_HALF=$STATUS_DIR/notified_energy_bellow_half
 DISK_IO_DEVICE='dm-1'
 DISK_SPACE_DEVICE='/dev/mapper/kubuntu--vg-root'
+SCREEN_DEVICE='acpi_video0'
 
 
 load=$(awk '{printf("%4.2f", $1)}' /proc/loadavg)
@@ -277,8 +278,8 @@ volume_pactl=$(
 volume="($volume_pactl)"
 
 screen_brightness=$(
-    max=$(cat /sys/class/backlight/acpi_video0/max_brightness)
-    cur=$(cat /sys/class/backlight/acpi_video0/brightness)
+    max=$(cat /sys/class/backlight/"$SCREEN_DEVICE"/max_brightness)
+    cur=$(cat /sys/class/backlight/"$SCREEN_DEVICE"/brightness)
     awk -v max=$max -v cur=$cur 'BEGIN {printf("%d%%", cur/max*100)}'
 )