From 3e01588570e3c9d03302570a53958b14b5e355c0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ond=C5=99ej=20Nov=C3=BD?= <ondrej.novy@firma.seznam.cz>
Date: Tue, 26 May 2020 16:57:16 +0200
Subject: [PATCH] Plugin timesync_status: Handle value 0 correctly

---
 plugins/systemd/timesync_status | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/plugins/systemd/timesync_status b/plugins/systemd/timesync_status
index 63eb8ec8..c223d633 100755
--- a/plugins/systemd/timesync_status
+++ b/plugins/systemd/timesync_status
@@ -57,6 +57,10 @@ def parse_time(value):
     if ' ' in value:
         return sum(parse_time(x) for x in value.split(' '))
 
+    # If time is exactly zero (for example Jitter), there is no unit (suffix)
+    if value == "0" or value == "-0":
+        return 0
+
     match = re.match(r'^([+-]?[0-9.]+)([a-z]+)$', value)
     if not match:
         raise ValueError('Invalid time ' + value)