Add nesting checks, remove all references to X

firestarter

@@ -158,7 +158,7 @@ mate-settings-daemon
 command -v gnome-settings-daemon
 gnome-settings-daemon
 EOF
-	# X system statistics glances
+	# System statistics glances
 	cat << EOF > "$_configdir/stat-glances"
 [ -z "\$DISPLAY" ]
 :
@@ -259,6 +259,12 @@ Licensed under the MIT License
 https://gitlab.com/rehashedsalt/firestarter
 EOF
 }
+step_check() {
+	if pgrep firestarter > /dev/null 2>&1 && [ -z "$dryrun" ]; then
+		err "Firestarter is already running" 61
+	fi
+	return 0
+}
 step_preexecute() {
 	# Special things that can't use simple configuration files
 	[ "$dryrun" = "1" ] && return 0
@@ -424,6 +430,7 @@ main() {
 				;;
 		esac
 	done
+	step_check
 	step_preexecute
 	step_execute
 	step_wait