1 files changed, 11 insertions, 2 deletions

diff --git a/dmenu-urlselect b/dmenu-urlselect
index d4e1f59..a988826 100755
--- a/dmenu-urlselect
+++ b/dmenu-urlselect
@@ -2,18 +2,27 @@
 
 # Finds all URLs in stdin and prompts a dmenu choice, then writes the selected
 # url to stdout.
-# Usage: dmenu-urlselect [-m menu]
 # Requires: dmenu (or similar), urlgrep
 
+# Usage: dmenu-urlselect [-m menu]
+
 menu="dmenu -i -l 20"
 
+usage() {
+        echo "Usage: dmenu-urlselect [-m MENU]"
+}
+
 while getopts "m:" opt; do
         case "$opt" in
                 m)
                         menu="$OPTARG"
                         ;;
+                *)
+                        usage
+                        exit 1
+                        ;;
                 esac
 done
-shift `expr $OPTIND - 1`
+shift $((OPTIND - 1))
 
 urlgrep | $menu