+usage() {
+ echo 'Usage: fortune [OPTIONS]
+a simple POSIX sh/awk implementation of fortune
+
+ -h, --help show this help message
+ -l, --list list installed cookie files
+ -c FILE, --cookie FILE specify cookie file
+ -n LENGTH, --min LENGTH specify min fortune length
+ -N LENGTH, --max LENGTH specify max fortune length
+
+ fortune looks for fortunes in $FORTUNEDIR, which defaults to
+ /usr/share/fortune.
+
+Exit codes:
+ 0 success
+ 1 generic error
+ 2 argument parsing error'
+}
+
+parse_err() {
+ echo "$1"
+ $2
+ exit 2
+}
+
+DIR=${FORTUNEDIR:-"/usr/share/fortune/"}
+FILE="$(find $DIR -type f -not -name '*.dat')"
+MAXLENGTH=1000000000000
+MINLENGTH=0
+
+while [ "$1" != "" ]; do
+ case $1 in
+ -h | --help)
+ usage
+ exit
+ ;;
+ -c | --cookie)
+ FILE=$DIR/$2
+ ;;
+ -n | --min)
+ MINLENGTH=$2
+ ;;
+ -N | --max)
+ MAXLENGTH=$2
+ ;;
+ -l | --list)
+ ls -1 $DIR
+ exit
+ ;;
+ *)
+ parse_err "ERROR: unknown option \"$1\"" usage
+ ;;
+ esac
+ shift 2
+done
+
+[ "$MAXLENGTH" -lt "$MINLENGTH" ] && {
+ parse_err "ERROR: maximum length is less than minimum length"
+}
+
+[ -d "$FILE" ] && {
+ parse_err "ERROR: directory given, please provide a file or glob of files"
+}
+
+[ "$(find $FILE -maxdepth 1 -print -quit 2> /dev/null)" ] || {
+ parse_err "ERROR: no such file or directory"