1 files changed, 12 insertions, 3 deletions

diff --git a/dmenu-mail-aliases b/dmenu-mail-aliases
index 582f8e3..76999de 100755
--- a/dmenu-mail-aliases
+++ b/dmenu-mail-aliases
@@ -2,9 +2,14 @@
 
 # Select mail alias via dmenu
 # The email address must be the second word in a line of $aliasfile
-# Usage: dmenu-mail-aliases [-m menu]
 # Requires: dmenu (or similar)
 
+# Usage: dmenu-mail-aliases [-m menu]
+
+usage() {
+        echo "Usage: dmenu-mail-aliases [-m MENU]"
+}
+
 menu="dmenu -l 20"
 aliasfile="$HOME/.mblaze/aliases"
 
@@ -13,8 +18,12 @@ while getopts "m:" opt; do
                 m)
                         menu="$OPTARG"
                         ;;
+                *)
+                        usage
+                        exit 1
+                        ;;
                 esac
 done
-shift `expr $OPTIND - 1`
+shift $((OPTIND - 1))
 
-$menu $menuopts <"$aliasfile" | awk '{print $NF}' 
+$menu <"$aliasfile" | awk '{print $NF}'