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

mountroot()
{
  mkdir /cdrom /btrfs
  mount -t iso9660 /dev/sr0 /cdrom
  mount -t btrfs -o loop,subvol=ROOT /cdrom/live/filesystem.btrfs /btrfs
  modprobe brd rd_size=$((256 * 1024 * 2))
  btrfs device add /dev/ram0 /btrfs
  mount -o rw,remount /btrfs
  mount -o move /btrfs /root
  mkdir /root/cdrom
  mount -o move /cdrom /root/cdrom

  sed -i -e 's/^root:x:/root::/' /root/etc/passwd

  samizdat_install_udev_rules

  openvt -c 13 sh

  mkfifo "$MENUFIFO" || panic "mkfifo '$MENUFIFO' failed"
  bootmenu

  sleep 1000
}

samizdat_install_udev_rules()
{
  mkdir -p /etc/udev/rules.d
  echo 'ACTION=="add", SUBSYSTEM=="block", RUN+="/bin/grok-block $env{DEVNAME}"' \
    > /etc/udev/rules.d/z00_blockdev_mountroot.rules

  # 'udevadm trigger --action=add' does not work here; need to restard udevd
  # first. not sure why
  samizdat_restart_udev

  udevadm trigger -s block --action add
}

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


# TODO: do not duplicate these functions from common.sh

export MENUFIFO=/menu.fifo

addmenu()
{
  cat <<END >>$MENUFIFO # mind the tabs
setItem "$1" "dummy" "$2" "$3"
END
}

menutitle()
{
  printf 'setTitle "%s"\n' "$1" >>$MENUFIFO
  printf 'setWelcomeText "%s"\n' "$2" >>$MENUFIFO
}

bootmenu()
{
  OpenVT -f -c 7 -- dynmenu "$MENUFIFO" &&
  chvt 7 &&
  menutitle 'Samizdat\n\nAs the Internet develops there are\ntransitions in the management arrangements.\nThe time has come to take\na small step in one of those transitions.' 'Choose an installation target.'
# menutitle 'Samizdat\nfreedom from surveillance\nno trusted authorities' 'Choose an installation target.'
  addmenu "ramdisk" "[ Boot to RAM without installing anything ]" "menu-select boot-ram"
}