check existence of notify-send

jobhelper.sh

@@ -434,9 +434,10 @@ function j_notify(){
   local _body="$( date +%H:%M:%S ) $2"
   local _rc="$3"
 
-  local _urgency="normal"
-
+  if which notify-send >/dev/null 2>&1; then
     if [ -n "$DBUS_SESSION_BUS_ADDRESS" ]; then
+
+      local _urgency="normal"
       if [ -n "$_rc" ]; then
         if [ "$_rc" = "0" ]; then
           _summary="OK: ${_summary}"
@@ -445,8 +446,10 @@ function j_notify(){
           _urgency="critical"
         fi
       fi
+
       su "$SUDO_USER" -c "notify-send --urgency=${_urgency} '${_summary}' '${_body}'"
     fi
+  fi
 }
 
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