From: Joerg Jaspert <joerg@debian.org>
Date: Fri, 18 Dec 2015 21:25:32 +0000 (+0100)
Subject: cron.hourly locks itself
X-Git-Url: https://git.decadent.org.uk/gitweb/?p=dak.git;a=commitdiff_plain;h=95215adf6d9317e11be1118fb6144396c6dddf04

cron.hourly locks itself
---

diff --git a/config/debian/cron.hourly b/config/debian/cron.hourly
index 3c58395c..d2451b8a 100755
--- a/config/debian/cron.hourly
+++ b/config/debian/cron.hourly
@@ -2,6 +2,10 @@
 #
 # Executed hourly via cron, out of dak's crontab.
 
+# Only one of me should ever run.
+[  "${FLOCKER}"  != "$0" ] && exec env FLOCKER="$0" flock -E 0 -en "$0" "$0"
+"$@" || :
+
 set -e
 set -o pipefail
 set -u