# 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
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

# 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
        -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

for ARG in $(cat /proc/cmdline)

telinit "${DEFAULT_RUNLEVEL}"

telinit -v "${DEFAULT_RUNLEVEL}"