dhcp: add systemd service files

Add dhcpd.service and dhcrelay.service to support systemd systems.

(From OE-Core rev: 5f40081b0b9867bc167057712b04b3c1afb8a20d)

Signed-off-by: Chen Qi <Qi.Chen@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-connectivity/dhcp/dhcp.inc

@@ -14,11 +14,19 @@ DEPENDS = "openssl bind"
 
 SRC_URI = "ftp://ftp.isc.org/isc/dhcp/${PV}/dhcp-${PV}.tar.gz \
            file://site.h \
-	   file://init-relay file://default-relay \
-	   file://init-server file://default-server \
-	   file://dhclient.conf file://dhcpd.conf"
+           file://init-relay file://default-relay \
+           file://init-server file://default-server \
+           file://dhclient.conf file://dhcpd.conf \
+           file://dhcpd.service file://dhcrelay.service"
 
-inherit autotools
+inherit autotools systemd
+
+SYSTEMD_PACKAGES = "dhcp-server dhcp-relay"
+SYSTEMD_SERVICE_dhcp-server = "dhcpd.service"
+SYSTEMD_AUTO_ENABLE_dhcp-server = "disable"
+
+SYSTEMD_SERVICE_dhcp-relay = "dhcrelay.service"
+SYSTEMD_AUTO_ENABLE_dhcp-relay = "disable"
 
 TARGET_CFLAGS += "-D_GNU_SOURCE"
 EXTRA_OECONF = "--with-srv-lease-file=${localstatedir}/lib/dhcp/dhcpd.leases \
@@ -51,6 +59,13 @@ do_install_append () {
 		mv ${D}${sbindir}/dhclient ${D}${base_sbindir}/
 	fi
 	install -m 0755 ${S}/client/scripts/linux ${D}${base_sbindir}/dhclient-script
+
+	# Install systemd unit files
+	install -d ${D}${systemd_unitdir}/system
+	install -m 0644 ${WORKDIR}/dhcpd.service ${D}${systemd_unitdir}/system
+	install -m 0644 ${WORKDIR}/dhcrelay.service ${D}${systemd_unitdir}/system
+	sed -i -e 's,@SBINDIR@,${sbindir},g' ${D}${systemd_unitdir}/system/dhcpd.service ${D}${systemd_unitdir}/system/dhcrelay.service
+	sed -i -e 's,@SYSCONFDIR@,${sysconfdir},g' ${D}${systemd_unitdir}/system/dhcpd.service
 }
 
 PACKAGES += "dhcp-server dhcp-server-config dhcp-client dhcp-relay dhcp-omshell"

meta/recipes-connectivity/dhcp/files/dhcpd.service

@@ -0,0 +1,11 @@
+[Unit]
+Description=DHCP Server Daemon
+After=network.target
+After=time-sync.target
+
+[Service]
+EnvironmentFile=@SYSCONFDIR@/default/dhcp-server
+ExecStart=-@SBINDIR@/dhcpd -q $INTERFACES
+
+[Install]
+WantedBy=multi-user.target

meta/recipes-connectivity/dhcp/files/dhcrelay.service

@@ -0,0 +1,9 @@
+[Unit]
+Description=DHCP Relay Agent Daemon
+After=network.target
+
+[Service]
+ExecStart=@SBINDIR@/dhcrelay -d --no-pid
+
+[Install]
+WantedBy=multi-user.target