Autopause functionality (#531)

files/autopause/pause.sh

@@ -0,0 +1,19 @@
+#!/bin/bash
+
+if [[ $( ps -a -o stat,comm | grep 'java' | awk '{ print $1 }') =~ ^S.*$ ]] ; then
+  # save world
+  rcon-cli save-all >/dev/null
+
+  # wait until mc-monitor is no longer connected to the server
+  while :
+  do
+    if [[ -z "$(netstat -nt | grep "127.0.0.1:$SERVER_PORT" | grep 'ESTABLISHED')" ]]; then
+      break
+    fi
+    sleep 0.1
+  done
+
+  # finally pause the process
+  echo "[$(date -Iseconds)] [Autopause] Pausing Java process" >/tmp/terminal-mc
+  killall -q -STOP java
+fi