Script to switch a monitor on and off

diff --git a/screencontrol.sh b/screencontrol.sh
new file mode 100755 (executable)
index 0000000..b01fc91
--- /dev/null
+++ b/screencontrol.sh
@@ -0,0 +1,61 @@
+#!/bin/bash
+# Script to control and query a connected screen
+# For infoscreen purposes
+# Tries to use cec-client and falls back to DPMS
+# Usage: ./screencontrol.sh [query | on | off]
+
+export DISPLAY=:0
+if [ -z "${1}" ]; then
+  set -- "query"
+fi
+
+if [ "${1}" == "query" ]; then
+  if status=$(echo "pow 0" | cec-client -s -d 1); then
+    if [[ ${status} =~ (power status: on) ]]; then
+      echo "Screen is on"
+    else
+      echo "Screen is off"
+    fi
+  else
+    if status=$(xset q); then
+      if [[ ${status} =~ (Monitor is Off) ]]; then
+        echo "Screen is off"
+      else
+        echo "Screen is on"
+      fi
+    else
+      echo "Unable to determine status of screen"
+      exit 1
+    fi
+  fi
+elif [ "${1}" == "on" ]; then
+  if echo "on 0" | cec-client -s -d 1 >/dev/null; then
+    xset s off
+    xset s noblank
+    xset -dpms
+    echo "Screen turned on (CEC)"
+  else
+    if xset dpms force on; then
+      xset s off
+      xset s noblank
+      xset -dpms
+      echo "Screen turned on (DPMS)"
+    else
+      echo "Unable to turn screen on"
+      exit 1
+    fi
+  fi
+elif [ "${1}" == "off" ]; then
+  if echo "standby 0" | cec-client -s -d 1 >/dev/null; then
+    echo "Screen turned off (CEC)"
+  else
+    if xset dpms force off; then
+      echo "Screen turned off (DPMS)"
+    else
+      echo "Unable to turn screen off"
+    fi
+  fi
+else
+  echo "Error: Unknown command"
+  exit 1
+fi