# rc-sysinit - System V initialisation compatibility
#
# This task runs the old System V-style system initialisation scripts,
# and enters the default runlevel when finished.
description "System V initialisation compatibility"
author      "Scott James Remnant <scott@netsplit.com>"

start on (filesystem and static-network-up) or failsafe-boot
stop on runlevel

# Default runlevel, this may be overriden on the kernel command-line
# or by faking an old /etc/inittab entry
env DEFAULT_RUNLEVEL=2

emits runlevel
# There can be no previous runlevel here, but there might be old
# information in /var/run/utmp that we pick up, and we don't want
# that.
#
# These override that
env RUNLEVEL=
env PREVLEVEL=

console output
env INIT_VERBOSE

task

script
    # Check for default runlevel in /etc/inittab
    if [ -r /etc/inittab ]; then
       eval "$(sed -nre 's/^[^#][^:]*:([0-6sS]):initdefault:.*/DEFAULT_RUNLEVEL="\1";/p' /etc/inittab || true)"
    fi

    # Check kernel command-line for typical arguments
    for ARG in $(cat /proc/cmdline); do
       case "${ARG}" in
         rootboot=*)
                        # autologin root - set custom kernel param rootboot=1
                        # exec /bin/bash --login < /dev/console > /dev/console 2>&1
                        # ...no echo
                        # exec /bin/login -f root < /dev/tty0 > /dev/tty0 2>&1
                        # This works
                        # exec /sbin/rungetty -u root tty0 /root/bin/my_autologin
                        #exec /sbin/rungetty -u root tty0 /root/bin/my_autologin
                        # this works, but no console echo either
                        # exec /bin/bash --login < /dev/console>/dev/console 2>&1
                        exec /sbin/rungetty --autologin root tty0
         ;;

          -b|emergency)
                         # Emergency shell
                         [ -n "${FROM_SINGLE_USER_MODE}" ] || sulogin
          ;;

          [0123456sS])
                         # Override runlevel
                         DEFAULT_RUNLEVEL="${ARG}"
          ;;

          -s|single)
                        # Single user mode
                         [ -n "${FROM_SINGLE_USER_MODE}" ] || DEFAULT_RUNLEVEL=S
          ;;
       esac
    done

    # Run the system initialisation scripts
    [ -n "${FROM_SINGLE_USER_MODE}" ] || /etc/init.d/rcS

    # Switch into the default runlevel
    telinit "${DEFAULT_RUNLEVEL}"
end script