#!/usr/bin/ash
PATH=/usr/bin

. /init_functions

mount -t proc proc /proc -o nosuid,noexec,nodev
mount -t sysfs sys /sys -o nosuid,noexec,nodev
mount -t devtmpfs dev /dev -o mode=0755,nosuid
mount -t tmpfs run /run -o nosuid,nodev,mode=0755
mkdir -m755 /run/initramfs

# parse the kernel command line
parse_cmdline

# if available, start udevd at this stage
if [ -x /usr/lib/udev/udevd ]; then
    msg ":: Starting udevd..."
    /usr/lib/udev/udevd --daemon --resolve-names=never
    udevd_running=1
    msg "done."
else
    udevd_running=0
fi

for d in ${disablehooks//,/ }; do
    [ -e "/hooks/$d" ] && chmod 644 "/hooks/$d"
done

. /config

run_hookfunctions 'run_earlyhook' 'early hook' $EARLYHOOKS

[ -n "${earlymodules//[[:space:]]}" ] && modprobe -qab ${earlymodules//,/ }
[ -n "${MODULES//[[:space:]]}" ] && modprobe -qab $MODULES

# If rootdelay is empty or not a non-negative integer, set it to 10
if [ -z "${rootdelay}" ] || ! [ "${rootdelay}" -ge 0 ]; then
    rootdelay=10
fi

run_hookfunctions 'run_hook' 'hook' $HOOKS

# honor the old behavior of break=y as a synonym for break=premount
if [ "${break}" = "y" ] || [ "${break}" = "premount" ]; then
    echo ":: Pre-mount break requested, type 'exit' to resume operation"
    launch_interactive_shell
fi

rootdev=$(resolve_device "$root") && root=$rootdev
unset rootdev

fsck_root

# Mount root at /new_root
${mount_handler:-default_mount_handler} /new_root

init=${init:-/sbin/init}
if [ "$(stat -c %D /)" = "$(stat -c %D /new_root)" ]; then
    # Nothing got mounted on /new_root. This is the end, we don't know what to do anymore
    # We fall back into a shell, but the shell has now PID 1
    # This way, manual recovery is still possible.
    err "Failed to mount the real root device."
    echo "Bailing out, you are on your own. Good luck."
    echo
    launch_interactive_shell --exec
elif [ ! -x "/new_root${init}" ]; then
    # Successfully mounted /new_root, but ${init} is missing
    # The same logic as above applies
    err "Root device mounted successfully, but ${init} does not exist."
    echo "Bailing out, you are on your own. Good luck."
    echo
    launch_interactive_shell --exec
fi

run_hookfunctions 'run_latehook' 'late hook' $LATEHOOKS

run_hookfunctions 'run_cleanuphook' 'cleanup hook' $CLEANUPHOOKS

# mount /usr if it exists
realtab=/new_root/etc/fstab
if [ -f "$realtab" ]; then
    if usr_source=$(findmnt -snero source --tab-file="$realtab" /usr); then
        mountopts=$(findmnt -snero options --tab-file="$realtab" /usr)
        fsck_device "$usr_source"
        msg ":: mounting '$usr_source' on /usr"
        mount "$usr_source" /new_root/usr -o "$mountopts"
    fi
fi

if [ "${break}" = "postmount" ]; then
    echo ":: Post-mount break requested, type 'exit' to resume operation"
    launch_interactive_shell
fi

# Stop udevd if is running
if [ "${udevd_running}" -eq 1 ]; then
    udevadm control --exit
    udevadm info --cleanup-db
fi

exec env -i "TERM=$TERM" /sbin/switch_root /new_root $init "$@"

# vim: set ft=sh ts=4 sw=4 et: