net::ifupdown: add sysvinit start script

Also add a minimal /etc/network/interfaces file, so that ifupdown is
happy when started.

Author: sixtyfourktec

recipes/net/ifupdown.yaml

@@ -10,7 +10,7 @@ checkoutSCM:
     digestSHA1: "6df0fc3b6ed0d16ce55b4d01d0cbb6993294afde"
     stripComponents: 1
 
-buildVars: [CC]
+buildVars: [CC, CONFIG_INIT]
 buildScript: |
     mkdir -p build
     cp -a $1/* build/
@@ -33,5 +33,13 @@ buildScript: |
 
     mkdir -p install/etc/network/if-{pre-up.d,up.d,post-down.d,down.d}
 
+    # add minimal interfaces file
+    printf "auto lo\niface lo inet loopback\n" > install/etc/network/interfaces
+
+    # add init script
+    if [[ ${CONFIG_INIT:-} == "sysvinit" ]]; then
+        install -D -m 0755 $<@ifupdown/S40network.sh@> install/etc/init.d/S40network.sh
+    fi
+
 packageScript: |
     installPackageBin "$1/install/"

recipes/net/ifupdown/S40network.sh

@@ -0,0 +1,29 @@
+#!/bin/sh
+#
+# Start the network....
+#
+
+# Debian ifupdown needs the /run/network lock directory
+mkdir -p /run/network
+
+case "$1" in
+  start)
+	printf "Starting network: "
+	/sbin/ifup -a
+	[ $? = 0 ] && echo "OK" || echo "FAIL"
+	;;
+  stop)
+	printf "Stopping network: "
+	/sbin/ifdown -a
+	[ $? = 0 ] && echo "OK" || echo "FAIL"
+	;;
+  restart|reload)
+	"$0" stop
+	"$0" start
+	;;
+  *)
+	echo "Usage: $0 {start|stop|restart}"
+	exit 1
+esac
+
+exit $?