hangman-helper: clean up

1 files changed, 13 insertions, 4 deletions

diff --git a/hangman-helper.sh b/hangman-helper.sh
index 3d14a7e..d6bf0ef 100644
--- a/hangman-helper.sh
+++ b/hangman-helper.sh
@@ -1,15 +1,24 @@
 #!/bin/bash
+# Usage: hangman-helper word not [-l]
+# <word> is the known word, with unknown characters replaced with '.'.
+# <not> is a sequence of the characters that are known to not be in the word.
+#
+# Without the `-l` flag, it produces a list of possible completions.
+#
+# Witht the `-l` flag, it produces a list of letters,
+# sorted by the number of times they appear in the normal list
+
 word=$1
 not=$2
 flag=$3
 
-temp=`mktemp`
+temp="$(mktemp --tmpdir "${0##*/}.XXXXXXXXXX")"
+trap "rm -f -- $(printf '%q' "$temp")" EXIT
 
-grep -i '^'"$word"'$' /usr/share/dict/words | grep -iv "['$not]" > "$temp"
+grep -ix "$word" /usr/share/dict/words | grep -iv "['$not]" > "$temp"
 
-if [ "$flag" = '-l' ]; then
+if [[ "$flag" = '-l' ]]; then
 	cat "$temp" | tr 'A-Z' 'a-z' | sed 's/\(.\)/\1\n/'g | sort | uniq -c | sort -n
 else
 	cat "$temp"
 fi
-rm "$temp"