From 6124d1b8994b0a1f2ebc9f33453bfda8901afb05 Mon Sep 17 00:00:00 2001
From: Alexandre Aubin <alex.aubin@mailoo.org>
Date: Sat, 16 Nov 2019 15:33:51 +0100
Subject: [PATCH] Only run these commands if the variables are not empty

---
 data/helpers.d/systemd | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/data/helpers.d/systemd b/data/helpers.d/systemd
index 4b3b5a289..105678b88 100644
--- a/data/helpers.d/systemd
+++ b/data/helpers.d/systemd
@@ -165,9 +165,15 @@ ynh_systemd_action() {
 #
 # usage: ynh_clean_check_starting
 ynh_clean_check_starting () {
-	# Stop the execution of tail.
-	kill -s 15 $pid_tail 2>&1
-	ynh_secure_remove "$templog" 2>&1
+    if [ -n "$pid_tail" ]
+    then
+        # Stop the execution of tail.
+        kill -s 15 $pid_tail 2>&1
+    fi
+    if [ -n "$templog" ]
+    then
+	    ynh_secure_remove "$templog" 2>&1
+    fi
 }