otp.sh

#!/usr/bin/env bash
LOGINUSER="$(who am i | awk '{print $1}')"
HOMEDIR="$(getent passwd $LOGINUSER | cut -d: -f6)"
OTPKEY="$HOMEDIR/.otpkeys"
RCX=0
echo

if [ -f "$OTPKEY" ]
then
  while read -r services; do
    if [ -z $1 ] || [[ "${services%=*}" =~ $1 ]]
    then
      ((RCX++))
      printf "${services%=*} : "
      oathtool --totp -b "${services#*=}"
    fi
  done < "$OTPKEY"
fi

if [ $RCX -eq 0 ]
then
  echo "Usage:"
  echo "   $0 google"
  echo
  echo "Configuration:"
  echo "   $OTPKEY"
  echo
  echo "Format:"
  echo "   name=key"
fi
echo