git.slaskete.net - einar-bin/blob - screencontrol.sh

   1 #!/bin/bash
   2 # Script to control and query a connected screen
   3 # For infoscreen purposes
   4 # Tries to use cec-client and falls back to DPMS
   5 # Usage: ./screencontrol.sh [query | on | off]
   6
   7 export DISPLAY=:0
   8 if [ -z "${1}" ]; then
   9   set -- "query"
  10 fi
  11
  12 if [ "${1}" == "query" ]; then
  13   if status=$(echo "pow 0" | cec-client -s -d 1); then
  14     if [[ ${status} =~ (power status: on) ]]; then
  15       echo "Screen is on"
  16     else
  17       echo "Screen is off"
  18     fi
  19   else
  20     if status=$(xset q); then
  21       if [[ ${status} =~ (Monitor is Off) ]]; then
  22         echo "Screen is off"
  23       else
  24         echo "Screen is on"
  25       fi
  26     else
  27       echo "Unable to determine status of screen"
  28       exit 1
  29     fi
  30   fi
  31 elif [ "${1}" == "on" ]; then
  32   if echo "on 0" | cec-client -s -d 1 >/dev/null; then
  33     xset s off
  34     xset s noblank
  35     xset -dpms
  36     echo "Screen turned on (CEC)"
  37   else
  38     if xset dpms force on; then
  39       xset s off
  40       xset s noblank
  41       xset -dpms
  42       echo "Screen turned on (DPMS)"
  43     else
  44       echo "Unable to turn screen on"
  45       exit 1
  46     fi
  47   fi
  48 elif [ "${1}" == "off" ]; then
  49   if echo "standby 0" | cec-client -s -d 1 >/dev/null; then
  50     echo "Screen turned off (CEC)"
  51   else
  52     if xset dpms force off; then
  53       echo "Screen turned off (DPMS)"
  54     else
  55       echo "Unable to turn screen off"
  56     fi
  57   fi
  58 else
  59   echo "Error: Unknown command"
  60   exit 1
  61 fi