Add support for the s6 supervision suite

sh/s6.sh

@@ -0,0 +1,46 @@
+# Start / stop / status functions for s6 support
+# Copyright (c) 2015 William Hubbs <w.d.hubbs@gmail.com>
+# Released under the 2-clause BSD license.
+
+[ -z "${s6_service_path}" ] && s6_service_path="/etc/svc.d/${RC_SVCNAME}"
+
+s6_start()
+{
+	if [ ! -d "${s6_service_path}" ]; then
+		eerror "${s6_service_path} does not exist."
+ 	return 1
+ fi
+	local rc
+	ebegin "Starting ${name:-$RC_SVCNAME}"
+	ln -sf "${s6_service_path}" "${RC_SVCDIR}"/s6-scan
+	s6-svscanctl -an "${RC_SVCDIR}"/s6-scan
+	rc=$?
+	if [ -n "$s6_svwait_options_start" ]; then
+		s6-svwait ${s6_svwait_options_start} "${s6_service_path}"
+		rc=$?
+	fi
+	eend $rc "Failed to start $RC_SVCNAME"
+}
+
+s6_stop()
+{
+	if [ ! -d "${s6_service_path}" ]; then
+		eerror "${s6_service_path} does not exist."
+ 	return 1
+ fi
+	local rc
+	ebegin "Stopping ${name:-$RC_SVCNAME}"
+	rm -rf "${RC_SVCDIR}/s6-scan/${s6_service_path##*/}"
+	s6-svscanctl -an "${RC_SVCDIR}"/s6-scan
+	rc=$? 
+	if [ -n "$s6_svwait_options_stop" ]; then
+		s6-svwait ${s6_svwait_options_stop} "${s6_service_path}"
+		rc=$?
+	fi
+	eend $rc "Failed to stop $RC_SVCNAME"
+}
+
+s6_status()
+{
+	s6-svstat "${s6_service_path}"
+}