#!/bin/sh
klogd -c1 # TODO: This should be even earlier.  Can it go on the kernel command line?

. common.sh
debug_log samizdat.init

my_configure_networking()
{
    configure_networking > /dev/tty1
    if [ -e /run/net-"$DEVICE".conf ]
    then
        . /run/net-"$DEVICE".conf
        printf 'Note: configure_networking: ROOTSERVER=%s\n', "$ROOTSERVER" >&2
    else
        false
    fi
}

read_nbd_variables()
{
    NBDCLIENT=:
    . /scripts/local-top/nbd
    unset NBDCLIENT
}

run_nbd_client()
{
    (debug_log samizdat.nbd
     read_nbd_variables
     for DEVNAME in /dev/nbd0 /dev/nbd1
     do
         case "$DEVNAME" in
             /dev/nbd0) nbdpath=samizdat.btrfs ;;
             /dev/nbd1) nbdpath=samizdat.patch.btrfs ;;
         esac
         nbd-client $nbdsrv -N $nbdpath $nbdport $DEVNAME -swap -persist -systemd-mark
     done
     bootdone nbd-script)
}

write_resolv_dot_conf()
{

    if [ "$IPV4DNS0" != '0.0.0.0' ]; then
        printf '%s\n' "$IPV4DNS0" "$IPV4DNS1" |
            sed -e '/^0.0.0.0$/d; s/^/nameserver /' > /root/etc/resolv.conf
    fi
}

get_os_name()
{
    [ -r /root/etc/os-release ] && . /root/etc/os-release
    echo -n ${PRETTY_NAME:-Debian GNU/Linux}
}

mountroot()
{
  openvt -c 13 sh

  mkfifo "$MENUFIFO"

  if [ "$nbdroot" ]; then
      my_configure_networking
      run_nbd_client

      wait_for_gnupghome_tar
      (sleep 5; echo ) &
      (. common.sh && . btrfs-create.sh && init_gpg)
  fi

  bootmenu
  samizdat_install_udev_rules
  bootwait samizdat-gpg
  bootwait root-mounted
  osname=$(get_os_name)
  write_resolv_dot_conf
  chvt 1
  cat >/dev/tty1 <<EOF
  Success!

Samizdat has mounted the rootfs.

Control now goes to ${osname}.

A login prompt should appear shortly.
Press alt-f9 for rescue terminal.
EOF
}

wait_for_gnupghome_tar()
{
  [ -e /gnupghome.tar ] && return
  echo -n Waiting to receive GPG keys through the network... > /dev/tty1
  (while ! tftp -g -r gnupghome.tar -l /gnupghome.tar.$$ "$ROOTSERVER" 2>/run/initramfs/samizdat/log/tftp.$$.log; do
    sleep 1;
    echo -n . > /dev/tty1
  done
  mv /gnupghome.tar.$$ /gnupghome.tar)
  echo '  done.' > /dev/tty1
  bootdone gnupg-tar
}

samizdat_restart_udev()
{
  local LOG_DIR=/run/initramfs/samizdat/log
  mkdir -p "$LOG_DIR"
  killall systemd-udevd 2>/dev/null
  /lib/systemd/systemd-udevd --resolve-names=never --debug >$LOG_DIR/udevd-systemd.log 2>&1 &
  udevadm hwdb --update  # rule is not executed by 'udevadm trigger' otherwise.  not sure why
}