#!/bin/sh
# -*- mode: shell-script; indent-tabs-mode: nil; sh-basic-offset: 4; -*-
# ex: ts=8 sw=4 sts=4 et filetype=sh
#
# Licensed under the GPLv2
#
# Copyright 2011, Red Hat, Inc.
# Harald Hoyer <harald@redhat.com>

#!/bin/sh
. /lib/dracut-lib.sh
export TERM=linux

emergency_shell()
{
    set +e
    if [ "$1" = "-n" ]; then
        _rdshell_name=$2
        shift 2
    else
        _rdshell_name=dracut
    fi
    echo ; echo
    warn $@
    source_hook shutdown-emergency
    echo
    if getargbool 1 rd.shell -y rdshell || getarg rd.break rdbreak; then
        [ -x /lib/udev/console_init ] && /lib/udev/console_init /dev/console
        echo "Dropping to debug shell."
        echo
        export PS1="$_rdshell_name:\${PWD}# "
        [ -e /.profile ] || echo "exec 0<>/dev/console 1<>/dev/console 2<>/dev/console" > /.profile
        sh -i -l
    else
        exec /lib/systemd/systemd-shutdown "$@"
        warn "Shutdown has failed. To debug this issue add \"rdshell\" to the kernel command line."
        # cause a kernel panic
        exit 1
    fi
}

trap "emergency_shell Signal caught!" 0

getarg 'rd.break=pre-shutdown' && emergency_shell -n cmdline "Break before pre-shutdown"

umount_a() {
    local _did_umount="n"
    while read a mp a; do
        if strstr "$mp" oldroot; then
            if umount "$mp"; then
                _did_umount="y"
                echo "Unmounted $mp."
            fi
        fi
    done </proc/mounts
    [ "$_did_umount" = "y" ] && return 0
    return 1
}

_cnt=0
while [ $_cnt -le 40 ]; do
    umount_a 2>/dev/null || break
    _cnt=$(($_cnt+1))
done
[ $_cnt -ge 40 ] && umount_a

check_finished() {
    local f
    for f in $hookdir/shutdown/*.sh; do
        [ -e "$f" ] || continue
        ( . "$f" ) || return 1
    done
    return 0
}

_cnt=0
while [ $_cnt -le 40 ]; do
    check_finished 2>/dev/null && break
    _cnt=$(($_cnt+1))
done
[ $_cnt -ge 40 ] && check_finished 

getarg 'rd.break=shutdown' && emergency_shell -n cmdline "Break before shutdown"
[ "$1" = "reboot" ] && reboot -f -d -n --no-wall
[ "$1" = "poweroff" ] && poweroff -f -d -n --no-wall
[ "$1" = "halt" ] && halt -f -d -n --no-wall
[ "$1" = "kexec" ] && kexec -e