From b8055c05e256ccd35ce115864725bfee73b22731 Mon Sep 17 00:00:00 2001
From: Yu Watanabe <watanabe.yu+github@gmail.com>
Date: Wed, 6 Feb 2019 17:41:26 +0100
Subject: [PATCH] core/load-fragment: empty assignment to PIDFile= resets the
 value

Follow-up for a9353a5c5b512f107955e56a9812724f40b841d3.
---
 src/core/load-fragment.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/core/load-fragment.c b/src/core/load-fragment.c
index 159e8d50508..44f00a30460 100644
--- a/src/core/load-fragment.c
+++ b/src/core/load-fragment.c
@@ -4254,6 +4254,12 @@ int config_parse_pid_file(
         assert(rvalue);
         assert(u);
 
+        if (isempty(rvalue)) {
+                /* An empty assignment removes already set value. */
+                *s = mfree(*s);
+                return 0;
+        }
+
         r = unit_full_printf(u, rvalue, &k);
         if (r < 0) {
                 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to resolve unit specifiers in '%s', ignoring: %m", rvalue);
-- 
2.47.3