Update README to markdown.

LICENSE

@@ -1,24 +1,17 @@
-This is free and unencumbered software released into the public domain.
+Copyright (C) 2024 Nicolás A. Ortega Froysa <nicolas@ortegas.org>
 
-Anyone is free to copy, modify, publish, use, compile, sell, or
+This software is provided 'as-is', without any express or implied
-distribute this software, either in source code form or as a compiled
+warranty.  In no event will the authors be held liable for any damages
-binary, for any purpose, commercial or non-commercial, and by any
+arising from the use of this software.
-means.
 
-In jurisdictions that recognize copyright laws, the author or authors
+Permission is granted to anyone to use this software for any purpose,
-of this software dedicate any and all copyright interest in the
+including commercial applications, and to alter it and redistribute it
-software to the public domain. We make this dedication for the benefit
+freely, subject to the following restrictions:
-of the public at large and to the detriment of our heirs and
-successors. We intend this dedication to be an overt act of
-relinquishment in perpetuity of all present and future rights to this
-software under copyright law.
 
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+1. The origin of this software must not be misrepresented; you must not
-EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+   claim that you wrote the original software. If you use this software
-MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+   in a product, an acknowledgment in the product documentation would be
-IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+   appreciated but is not required.
-OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+2. Altered source versions must be plainly marked as such, and must not be
-ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+   misrepresented as being the original software.
-OTHER DEALINGS IN THE SOFTWARE.
+3. This notice may not be removed or altered from any source distribution.
-
-For more information, please refer to <http://unlicense.org/>

README

@@ -1,13 +0,0 @@
-==========
-*** d6 ***
-==========
-A diceware password generator written in Bash. I believe I've written
-one before, also called 'd6', but I can't find it anywhere, so I wrote a
-new one. I'm too lazy to write a real README for this, so just use the
-`-h` option. To install it just run the `install` command, which is all
-any Makefile really does anyway. Don't know how to use it? Use the
-manual page.
-
-This project is licensed with the Unlicense, because it's literally just
-something I whipped up in less than an hour. Feel free to use it however
-you want, just remember that it comes without warranty of any kind.

README.md

@@ -0,0 +1,7 @@
+# d6
+
+A diceware password generator written in Bash. I believe I've written one
+before, also called 'd6', but I can't find it anywhere, so I wrote a new one.
+I'm too lazy to write a real README for this, so just use the `-h` option. To
+install it just run the `install` command, which is all any Makefile really
+does anyway. Don't know how to use it? Use the manual page.

d6.sh

@@ -1,28 +1,26 @@
 #!/bin/bash
-# This is free and unencumbered software released into the public domain.
+
+# Copyright (C) 2024 Nicolás Ortega Froysa <nicolas@ortegas.org> All rights reserved.
+# Author: Nicolás Ortega Froysa <nicolas@ortegas.org>
 #
-# Anyone is free to copy, modify, publish, use, compile, sell, or
+# This software is provided 'as-is', without any express or implied
-# distribute this software, either in source code form or as a compiled
+# warranty. In no event will the authors be held liable for any damages
-# binary, for any purpose, commercial or non-commercial, and by any
+# arising from the use of this software.
-# means.
 #
-# In jurisdictions that recognize copyright laws, the author or authors
+# Permission is granted to anyone to use this software for any purpose,
-# of this software dedicate any and all copyright interest in the
+# including commercial applications, and to alter it and redistribute it
-# software to the public domain. We make this dedication for the benefit
+# freely, subject to the following restrictions:
-# of the public at large and to the detriment of our heirs and
-# successors. We intend this dedication to be an overt act of
-# relinquishment in perpetuity of all present and future rights to this
-# software under copyright law.
 #
-# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+# 1. The origin of this software must not be misrepresented; you must not
-# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+#    claim that you wrote the original software. If you use this software
-# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+#    in a product, an acknowledgment in the product documentation would be
-# IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+#    appreciated but is not required.
-# OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
-# ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
-# OTHER DEALINGS IN THE SOFTWARE.
 #
-# For more information, please refer to <http://unlicense.org/>
+# 2. Altered source versions must be plainly marked as such, and must not be
+#    misrepresented as being the original software.
+#
+# 3. This notice may not be removed or altered from any source
+#    distribution.
 
 VERSION="1.0"
 
@@ -44,7 +42,7 @@ function print_help() {
 }
 
 function test_case() {
-	if [ $1 != "lower" ] && [ $1 != "upper" ] && [ $1 != "capital" ]
+	if [ "$1" != "lower" ] && [ "$1" != "upper" ] && [ "$1" != "capital" ]
 	then
 		return 1
 	else
@@ -62,52 +60,59 @@ do
 	case $arg in
 		v)
 			echo "d6 v$VERSION"
-			exit 0;;
+			exit 0
+			;;
 		h)
 			print_help
-			exit 0;;
+			exit 0
+			;;
 		n)
-			NUM_WORDS=$OPTARG;;
+			NUM_WORDS=$OPTARG
+			;;
 		f)
-			WORDLIST="$OPTARG";;
+			WORDLIST="$OPTARG"
+			;;
 		d)
-			DELIMITER="$OPTARG";;
+			DELIMITER="$OPTARG"
+			;;
 		c)
-			if test_case $OPTARG
+			if test_case "$OPTARG"
 			then
 				CASE="$OPTARG"
 			else
 				echo "'$OPTARG' is an invalid case. Use 'capital', 'lower', or 'upper'."
 				exit 1
-			fi;;
+			fi
+			;;
 		?)
 			print_usage
 			exit 2
+			;;
 	esac
 done
 
 WORDS=""
 
-for i in $(seq 1 $NUM_WORDS)
+for i in $(seq 1 "$NUM_WORDS")
 do
 	ROLLS=""
-	for j in {1..5}
+	for _j in {1..5}
 	do
-		ROLLS="$((1 + $RANDOM % 6))$ROLLS"
+		ROLLS="$((1 + RANDOM % 6))$ROLLS"
 	done
 
-	if [ $CASE == "upper" ]
+	if [ "$CASE" == "upper" ]
 	then
-		WORD="$(awk "/$ROLLS/{ print toupper(\$2) }" $WORDLIST)"
+		WORD="$(awk "/$ROLLS/{ print toupper(\$2) }" "$WORDLIST")"
-	elif [ $CASE == "lower" ]
+	elif [ "$CASE" == "lower" ]
 	then
-		WORD="$(awk "/$ROLLS/{ print tolower(\$2) }" $WORDLIST)"
+		WORD="$(awk "/$ROLLS/{ print tolower(\$2) }" "$WORDLIST")"
 	else
-		WORD="$(awk "/$ROLLS/{ print \$2 }" $WORDLIST)"
+		WORD="$(awk "/$ROLLS/{ print \$2 }" "$WORDLIST")"
 		WORD="${WORD^}"
 	fi
 
-	if [ $i -eq $NUM_WORDS ]
+	if [ "$i" -eq "$NUM_WORDS" ]
 	then
 		WORDS="${WORDS}${WORD}"
 	else