triggerhappy: systemd support

[Thomas: use a relative symbolic link.]

Signed-off-by: Alex Suykov <alex.suykov@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/triggerhappy/triggerhappy.mk

@@ -34,4 +34,12 @@ define TRIGGERHAPPY_INSTALL_INIT_SYSV
 		$(TARGET_DIR)/etc/init.d/S10triggerhappy
 endef
 
+define TRIGGERHAPPY_INSTALL_INIT_SYSTEMD
+	$(INSTALL) -D -m 644 package/triggerhappy/triggerhappy.service \
+		$(TARGET_DIR)/usr/lib/systemd/system/triggerhappy.service
+	mkdir -p $(TARGET_DIR)/etc/systemd/system/multi-user.target.wants
+	ln -sf ../../../../usr/lib/systemd/system/triggerhappy.service \
+		$(TARGET_DIR)/etc/systemd/system/multi-user.target.wants/triggerhappy.service
+endef
+
 $(eval $(generic-package))

package/triggerhappy/triggerhappy.service

@@ -0,0 +1,9 @@
+[Unit]
+Description=Triggerhappy daemon
+
+[Service]
+ExecStart=/usr/sbin/thd --triggers /etc/triggerhappy/triggers.d --socket /var/run/thd.socket --user nobody /dev/input/event*
+Restart=always
+
+[Install]
+WantedBy=multi-user.target