1 files changed, 32 insertions, 0 deletions
diff --git a/src/util/health-check.sh b/src/util/health-check.sh
new file mode 100755
index 0000000..4604f4e
--- /dev/null
+++ b/src/util/health-check.sh
@@ -0,0 +1,32 @@
+#!/bin/sh
+#
+# Copyright (c) 2019 Dovecot authors, see the included COPYING file */
+#
+# This script is intended to be called by the script service and to be
+# connected to a socket using a service configuration like this:
+# 	executable = script -p /path/to/health-check.sh
+#
+# This simple example merely answers "PONG\n" if the input is "PING\n". It
+# stops waiting for input after $timeout which causes the process to die
+# which causes the script module to close the socket. Inputs and outputs
+# can be written to STDIN and STDOUT, they are duplicated file-descriptors
+# if called from the script service.
+
+timeout=10
+
+# timeout the read via trap for POSIX shell compatibility
+trap "exit 0" QUIT
+{
+	sleep $timeout
+	kill -3 $$ 2>/dev/null
+} &
+read -r input
+
+exit_code=$?
+cleaned_input=$(echo ${input} | sed "s/[^a-zA-Z0-9]//g")
+
+if [ ${exit_code} -eq 0 ] && [ "${cleaned_input}" = "PING" ];then
+	echo "PONG"
+fi
+# always exit successful
+exit 0