3 files changed, 113 insertions, 0 deletions
diff --git a/os1eindopdracht/readme.md b/os1eindopdracht/readme.md
new file mode 100644
index 0000000..42a91b1
--- /dev/null
+++ b/os1eindopdracht/readme.md
@@ -0,0 +1,3 @@
+# uhm (ultra hangman)
+
+
diff --git a/os1eindopdracht/uhm b/os1eindopdracht/uhm
new file mode 100755
index 0000000..324a863
--- /dev/null
+++ b/os1eindopdracht/uhm
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+#!/bin/dash
+WORD=""
+DICT="/usr/share/dict/words"
+ARGC=0
+
+usage() {
+	cat << EOF
+usage: $0 [-h] [-w word] [-d file]
+
+options:
+  -w    set word to \`word\`
+  -d    read dictionary from \`file\` ($DICT by default)
+  -h    show help
+EOF
+  exit $1
+}
+
+while getopts d:w:h OPT; do
+	[ $OPTIND -gt $ARGC ] && ARGC=$OPTIND
+	case $OPT in
+		h) usage 0 ;;
+		w) WORD=$OPTARG ;;
+		d) DICT=$OPTARG ;;
+		\?|*) usage 1 ;;
+	esac
+done
+
+if [ -z "$WORD" ]; then
+	# check if dictionary file exists
+	[ ! -e "$DICT" ] && echo "dictionary file doesn't exist!" && exit 1
+	# check if dictionary file contains at least one line
+	[ ! "`wc -l "$DICT" | cut -d' ' -f1`" -gt "0" ] && echo "dictionary file is empty!" && exit 1
+
+	# filter words containing apostrophe or words longer than 12 characters
+	WORD="`sed -e "/'/d" -e '/.\{13\}/d' "$DICT" | sort -R | head -n1`"
+	# check if word is empty
+	[ -z "$WORD" ] && echo "no usable words found in dictionary" && exit 1
+fi
+
+# convert word to lowercase
+WORD="`echo "$WORD" | tr '[:upper:]' '[:lower:]'`"
+
+pre_exit() {
+	trap - EXIT # prevent double exit trigger
+	echo ""
+	echo "the word was $WORD"
+	exit
+}
+
+# run pre_exit function on interrupt (Ctrl-C)
+trap pre_exit INT
+
+# main game loop (written in awk)
+tput clear # clear screen
+tput cup `stty size | cut -f1 -d' '` # move cursor to bottom left corner
+./uhm.awk -vword="$WORD"
+pre_exit
+
diff --git a/os1eindopdracht/uhm.awk b/os1eindopdracht/uhm.awk
new file mode 100755
index 0000000..c34333f
--- /dev/null
+++ b/os1eindopdracht/uhm.awk
@@ -0,0 +1,52 @@
+#!/bin/awk -f
+function prompt() {
+	printf "> "
+}
+
+BEGIN {
+	word=word
+	guessed_letters=""
+	guesses=10
+
+	prompt()
+}
+
+function header() {
+	printf "\n\n\n"
+	hidden_word = word
+	# replace all characters not in set `guessed_letters` with "_"
+	gsub("[^'"guessed_letters"]", "_", hidden_word)
+	print "current word: " hidden_word
+	print "you have " guesses " guess" (guesses == 1 ? "" : "es") " left"
+}
+
+function guess(a) {
+	if (index(guessed_letters, a) != 0) {
+		print "already guessed " a "!"
+		return
+	}
+	# append guess `a` to guessed_letters
+	guessed_letters = guessed_letters tolower(a)
+	# only subtract guess count if letter not in word
+	if (index(word, a) == 0) guesses -= 1
+
+	if (guesses == 0) {
+		print "you have no more guesses left!"
+		exit 0
+	}
+
+	temp = word
+	if (gsub("[^'"guessed_letters"]", "_", temp) == 0) { # check if all letters are guessed
+		print "you guessed the word!"
+		exit 0
+	}
+
+	header()
+}
+
+{
+	if (length($1) == 1) guess($1)
+	else print "please input a single letter"
+	prompt()
+}
+