Add (likely ugly) init script for openrc

Makefile

@@ -3,6 +3,10 @@ PREFIX?=/usr/local
 all: install
 
 install:
-	install -m 755 --owner root bin/uncloud-init $(PREFIX)/bin/uncloud-init
+	install -m 755 bin/uncloud-init $(PREFIX)/bin/uncloud-init
-	install -m 755 --owner root bin/uncloud-init-growpart $(PREFIX)/bin/uncloud-init-growpart
+	install -m 755 bin/uncloud-init-growpart $(PREFIX)/bin/uncloud-init-growpart
-	install -m 644 --owner root uncloud-init.service /etc/systemd/system/uncloud-init.service
+	if command -v systemd; then \
+		install -m 644 uncloud-init.service /etc/systemd/system/uncloud-init.service; \
+	else \
+		install -m 755 uncloud-init.rc /etc/init.d/uncloud-init; \
+	fi

uncloud-init.rc

@@ -0,0 +1,17 @@
+#!/sbin/openrc-run
+#
+# FIXME: I am pretty sure this is not 'right' as I am not familiar with this
+# init system and did not bother to read the docs throughoughly.
+
+name="$RC_SVCNAME"
+
+depend() {
+	use net logger
+	before sshd
+}
+
+start() {
+	ebegin "Starting uncloud-init"
+	logger /usr/local/bin/uncloud-init > /dev/null
+	eend $?
+}