if [ -f /usr/bin/keychain ];then
  case "$HOST" in
    s4|s5|c*)
    eval $(keychain --eval --agents ssh -Q --quiet ~/.ssh/id_rsa )
    ;;
    *)
    eval $(keychain --eval --agents gpg,ssh -Q --quiet ~/.ssh/id_rsa F5A1A949 )
    ;;
  esac
fi