yep

bin/mpd-monitor

@@ -1,15 +1,8 @@
 #!/bin/sh
 
-# exit if another instance is already running
-#if [ !$(pidof mpd-monitor > /dev/null) ]; then
-#  echo "mpd-monitor already running"
-#  exit
-#fi
-
-# this might actually work...
-RUNNING=$(pidof mpc > /dev/null)
-if [ !$RUNNING ]; then
-  echo "mpd-monitor already running"
+PID=$(pgrep -x mpc)
+if [ -n "$PID" ]; then
+  echo "another instance of mpd-monitor already running"
   exit
 fi