Refactor init scripts

Author: gsingh93

config/rootfs-overlay/etc/init.d/rcS

@@ -1,7 +1,25 @@
 #!/bin/sh
+### BEGIN INIT INFO
+# Provides:          setup
+# Required-Start:    $network
+# Required-Stop:
+# Default-Start:     2 3 4 5
+# Default-Stop:
+# Short-Description: Linux Exploit Dev Environment Setup
+# Description:       Linux Exploit Dev Environment Setup
+### END INIT INFO
 
 case "$1" in
     start)
+        # Setup networking
+        ETH_IF="$(ls /sys/class/net | grep -E '^(eth|enp)')"
+        ip link set "$ETH_IF" up
+        if [ -x "$(command -v udhcpc)" ]; then
+            udhcpc # Busybox DHCP
+        elif [ -x "$(command -v dhclient)" ]; then
+            dhclient # Ubuntu DHCP
+        fi
+
         # If the user already exists this won't cause any problems
         adduser user --disabled-password 2>/dev/null
 
@@ -16,7 +34,7 @@ case "$1" in
 
         # Only mount binder if the kernel supports it
         cat /proc/filesystems | grep binder > /dev/null
-        if [[ $? -eq 0 ]]; then
+        if [ $? -eq 0 ]; then
             mkdir -p /dev/binderfs
             mount -t binder binder /dev/binderfs
             ln -s /dev/binderfs/binder /dev/binder

config/rootfs-overlay/etc/rcS.d/S98setup renamed to config/rootfs-overlay/etc/init.d/setup

@@ -14,6 +14,7 @@
 # process   == program to run
 
 # Startup the system
+::sysinit:/bin/mount -t devtmpfs devtmpfs /dev
 ::sysinit:/bin/mount -t proc proc /proc
 ::sysinit:/bin/mount -t sysfs nodev /sys
 ::sysinit:/bin/mount -o remount,rw /
@@ -26,7 +27,7 @@ null::sysinit:/bin/ln -sf /proc/self/fd/1 /dev/stdout
 null::sysinit:/bin/ln -sf /proc/self/fd/2 /dev/stderr
 ::sysinit:/bin/hostname -F /etc/hostname
 # now run any rc scripts
-::sysinit:/etc/init.d/rcS
+::sysinit:/etc/rc
 
 # Instead of running getty on the serial port, we can directly run a bash login
 # shell so we're immediately logged in as root

config/rootfs-overlay/etc/inittab

@@ -0,0 +1,4 @@
+#!/bin/sh
+
+# TODO: Properly run all rc scripts
+/etc/init.d/setup start