package/rng-tools: add SysV init script

[Thomas: minor adjustments to make the script look more like our
standard init scripts.]

Signed-off-by: Benoît Thébaudeau <benoit@wsystem.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/rng-tools/S21rngd

@@ -0,0 +1,48 @@
+#!/bin/sh
+
+NAME="rngd"
+DAEMON="/usr/sbin/${NAME}"
+DAEMON_ARGS=""
+CFG_FILE="/etc/default/${NAME}"
+PID_FILE="/var/run/${NAME}.pid"
+
+# Read configuration variable file if it is present
+[ -r "${CFG_FILE}" ] && . "${CFG_FILE}"
+
+start()
+{
+	printf "Starting ${NAME}: "
+	start-stop-daemon -S -q -x "${DAEMON}" -- ${DAEMON_ARGS}
+	[ $? = 0 ] && echo "OK" || echo "FAIL"
+}
+
+stop()
+{
+	printf "Stopping ${NAME}: "
+	# This daemon does not exit properly with the default TERM signal unless
+	# it's forced to work by something reading /dev/random. Killing it and
+	# removing its PID file is more straightforward.
+	if start-stop-daemon -K -q -s KILL -p "${PID_FILE}" -n "${NAME}"; then
+		rm -f "${PID_FILE}"
+		echo "OK"
+	else
+		echo "FAIL"
+	fi
+}
+
+case "$1" in
+	start)
+		start
+		;;
+	stop)
+		stop
+		;;
+	restart|reload)
+		stop
+		start
+		;;
+	*)
+		echo "Usage: $0 {start|stop|restart|reload}" >&2
+		exit 1
+		;;
+esac

package/rng-tools/rng-tools.mk

@@ -22,6 +22,11 @@ else
 RNG_TOOLS_CONF_OPTS += --without-libgcrypt
 endif
 
+define RNG_TOOLS_INSTALL_INIT_SYSV
+	$(INSTALL) -D -m 755 package/rng-tools/S21rngd \
+		$(TARGET_DIR)/etc/init.d/S21rngd
+endef
+
 define RNG_TOOLS_INSTALL_INIT_SYSTEMD
 	$(INSTALL) -D -m 644 package/rng-tools/rngd.service \
 		$(TARGET_DIR)/usr/lib/systemd/system/rngd.service