petitboot: add pb-discover daemon

Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: Joel Stanley <joel@jms.id.au>
[Arnout: also source /etc/default file]
Signed-off-by: Arnout Vandecappelle <arnout@mind.be>

package/petitboot/S15pb-discover

@@ -0,0 +1,57 @@
+#!/bin/sh
+
+DAEMON="pb-discover"
+PIDFILE="/var/run/$DAEMON.pid"
+LOGFILE="/var/log/$DAEMON.log"
+
+PB_DISCOVER_ARGS="-l $LOGFILE"
+
+# shellcheck source=/dev/null
+[ -r "/etc/default/$DAEMON" ] && . "/etc/default/$DAEMON"
+
+if [ "$(pb-config debug)" = "enabled" ] ; then
+	PB_DISCOVER_ARGS="$PB_DISCOVER_ARGS --verbose"
+fi
+
+start() {
+	printf 'Starting %s: ' "$DAEMON"
+	# shellcheck disable=SC2086 # we need the word splitting
+	start-stop-daemon -S -q -b -p "$PIDFILE" -x "/usr/sbin/$DAEMON" \
+		-- $PB_DISCOVER_ARGS
+	status=$?
+	if [ "$status" -eq 0 ]; then
+		echo "OK"
+	else
+		echo "FAIL"
+	fi
+	return "$status"
+}
+
+stop() {
+	printf 'Stopping %s: ' "$DAEMON"
+	start-stop-daemon -K -q -p "$PIDFILE"
+	status=$?
+	if [ "$status" -eq 0 ]; then
+		echo "OK"
+	else
+		echo "FAIL"
+	fi
+	return "$status"
+}
+
+restart() {
+	stop
+	sleep 1
+	start
+}
+
+case "$1" in
+	start|stop|restart)
+		"$1";;
+	reload)
+		restart;;
+	*)
+		echo "Usage: $0 {start|stop|restart|reload}"
+		exit 1
+		;;
+esac

package/petitboot/petitboot.mk

@@ -53,6 +53,10 @@ define PETITBOOT_POST_INSTALL
 		$(TARGET_DIR)/etc/petitboot/boot.d/01-create-default-dtb
 	$(INSTALL) -D -m 0755 $(@D)/utils/hooks/90-sort-dtb \
 		$(TARGET_DIR)/etc/petitboot/boot.d/90-sort-dtb
+	$(INSTALL) -m 0755 -D $(PETITBOOT_PKGDIR)/S15pb-discover \
+		$(TARGET_DIR)/etc/init.d/S15pb-discover
+	ln -sf /usr/sbin/pb-udhcpc \
+		$(TARGET_DIR)/usr/share/udhcpc/default.script.d/
 endef
 
 PETITBOOT_POST_INSTALL_TARGET_HOOKS += PETITBOOT_POST_INSTALL