#!/bin/bash
#
# This is a script to run at startup of a bespoke sub-host

date +"subhost startup at %Y%m%d-%H%M%S"
    
mkdir -p /dev/pts /dev/shm /run
[ -f /proc/mounts ] || mount -t proc proc /proc
if ! grep "^none /run tmpfs" /proc/mounts ; then
    mount -t tmpfs -osize=80M none /run
    mount -t tmpfs -osize=20M none /dev/shm
    mount -t devpts none /dev/pts
    mount -t sysfs none /sys
    mkdir -p /run/lock /run/user
fi

if grep -q ' / ext4 rw,' /proc/mounts ; then
    ##
    ## Here's the "pretend init"
    ##

    zombie() {
	wait
	true # echo "zombie return $?" >&2
    }
    trap "zombie" 17 # SIGCHILD 

    /etc/init.d/rc S < /dev/null
    /etc/init.d/rc 2 < /dev/null
    SUBHOSTCTL=/run/initctl
    mkfifo $SUBHOSTCTL
    exec cat < $SUBHOSTCTL
    #exec /bin/bash -i
else
    echo "** The root filesystem is read-only; EXITING" >&2
    exit 1
fi