Add util/openssl-update-copyright shell script

#!/bin/bash

#

# Copyright 2018 The OpenSSL Project Authors. All Rights Reserved.

#

# Licensed under the OpenSSL license (the "License").  You may not use

# this file except in compliance with the License.  You can obtain a copy

# in the file LICENSE in the source distribution or at

# https://www.openssl.org/source/license.html

myname="$(basename $0)"

this_year="$(date '+%Y')"

some_year="[12][0-9][0-9][0-9]"

copyright_owner="The OpenSSL Project"

search="Copyright \(([cC]) \)\?\(${some_year}\)\(-${some_year}\)\? ${copyright_owner}"

replace="Copyright \1\2-${this_year} ${copyright_owner}"

function usage() {

	cat >&2 <<EOF

usage: $myname [-h|--help] [file|directory] ...

Updates the year ranges of all OpenSSL copyright statements in the given

files or directories. (Directories are traversed recursively.)

EOF

}

if [ $# -eq 0 ]; then

	usage

	exit 0

fi

for arg in "$@"; do

	case $arg in

		-h|--help)

			usage

			exit 0

			;;

		-*)

			echo -e "illegal option: $arg\n" >& 2

			usage

			exit 1

			;;

		*)

			if [ -f "$arg" ]; then

				sed -i "s/${search}/${replace}/g" "$arg"

			elif [ -d "$arg" ]; then

				find "$arg" -name '.[a-z]*' -prune -o -type f -exec sed -i "s/${search}/${replace}/g" {} +

			else

				echo "$arg: no such file or directory" >&2

			fi

			;;

	esac

done