# Fetch an RFC from the IETF site and write it to stdout # Check arguments if [ "$#" -ne 1 ] ; then printf >&2 'rfcf: Need one RFC number\n' exit 2 fi # Argument is RFC number rn=$1 # Retrieve the RFC with curl(1) curl -fsSL https://tools.ietf.org/rfc/rfc"$rn".txt