#!/bin/sh

if [ "$1" != "chroot" ]; then
    echo
    echo "> Welcome to userland!"
    echo "> Setting up overlay mount for writeable root"
    mount -t tmpfs tmpfs /tmp
    mkdir /tmp/upper
    mkdir /tmp/work
    mkdir /tmp/newroot
    mount -t overlay overlay \
        -o lowerdir=/,upperdir=/tmp/upper,workdir=/tmp/work /tmp/newroot
    mount --bind /dev /tmp/newroot/dev
    chroot /tmp/newroot /rvcinit chroot
else
    echo "> Entered overlay chroot, mounting /proc & /sys"
    mount -t proc proc /proc
    mount -t sysfs sys /sys

    echo "> Startup took: $(cut -d' ' -f0 </proc/uptime)s"

cat << EOF
                  _ _
                 | (_)
 _ ____   _____  | |_ _ __  _   ___  __
| '__\ \ / / __| | | | '_ \| | | \ \/ /
| |   \ V / (__  | | | | | | |_| |>  <
|_|    \_/ \___| |_|_|_| |_|\__,_/_/\_\ 


                              by _pi_

EOF

    echo "> Starting login shell on TTY /dev/hvc0"

    export PATH="$PATH:/usr/local/bin"

    while true; do
        # use getty to start a shell in a new tty
        getty -l /bin/sh -n 0 /dev/hvc0
        echo "> Restarting login shell"
    done
fi