helium-mount

#!/usr/bin/env zsh

prog_name=$0

usage_exit() {
  printf "Usage: %s [on|off]\n" "$prog_name"
  exit 1
}

do_mount() {
  pass helium-usb | ssh helium -- "cryptsetup open /dev/sda1 usb && mount /dev/mapper/usb /mnt/usb"
}

do_umount() {
  ssh helium -- "umount /mnt/usb; cryptsetup close usb"
}

if (( ${#} > 1 )); then
  usage_exit
fi

mount=0

if (( ${#} == 1 )); then
  arg=${1}; shift;
  case "${arg}" in
    on) mount=1 ;;
    off) mount=0 ;;
    *) usage_exit ;;
  esac
fi

case "${mount}" in
  1) do_mount ;;
  0) do_umount ;;
esac