clean up override files, add inittab

Signed-off-by: Justin Cormack <justin.cormack@docker.com>

alpine/Dockerfile

@@ -2,11 +2,12 @@ FROM alpine:edge
 
 MAINTAINER Justin Cormack <justin.cormack@unikernel.com>
 
-COPY repositories /etc/apk/repositories
-COPY motd hostname /etc/
+COPY repositories /etc/apk
 
 RUN apk update && apk upgrade && apk add e2fsprogs docker
 
+COPY etc /etc/
+
 RUN ln -s /bin/busybox /init
 
 CMD ["/bin/sh"]

alpine/Makefile

@@ -1,6 +1,6 @@
 all:	initrd.img
 
-initrd.img: Dockerfile hostname repositories motd
+initrd.img: Dockerfile repositories etc/hostname etc/motd etc/inittab
 	rm -f initrd.img
 	docker build -t moby:test .
 	docker run -i -v $(PWD):/export moby:test /export/mkinitrd.sh

alpine/etc/inittab

@@ -0,0 +1,21 @@
+# /etc/inittab
+
+::sysinit:/sbin/rc sysinit
+::wait:/sbin/rc default
+
+# Set up a couple of getty's
+#tty1::respawn:/sbin/getty 38400 tty1
+#tty2::respawn:/sbin/getty 38400 tty2
+#tty3::respawn:/sbin/getty 38400 tty3
+#tty4::respawn:/sbin/getty 38400 tty4
+#tty5::respawn:/sbin/getty 38400 tty5
+#tty6::respawn:/sbin/getty 38400 tty6
+
+# Put a getty on the serial port
+ttyS0::respawn:/sbin/getty -L ttyS0 115200 vt100
+
+# Stuff to do for the 3-finger salute
+::ctrlaltdel:/sbin/reboot
+
+# Stuff to do before rebooting
+::shutdown:/sbin/rc shutdown