better usage message

diff --git a/notify b/notify
index 83bf60804aa21ba143cffbf823f0cf99820e062f..f47a19d3641a8c2cafd03ffe6b54e68954094bf1 100755 (executable)
--- a/notify
+++ b/notify
@@ -1,10 +1,21 @@
 #!/bin/bash
 set -e
+usage () { cat <<END
+
+usage: ./notify senderfile recipientsfile 'message'
+
+recipientsfile: see test-recipients for an example
+
+senderinfo: file containing
+   email YOUREMAILADDRESS@EXAMPLE.COM
+   name YOUR NAME
+
+END
+}
 
 case "$#.$1" in
 3.[^-]*)       ;;
-*)             echo >&2 "usage: ./notify senderfile recipientsfile 'message'"
-               exit 1 ;;
+*)             usage >&2; exit 1 ;;
 esac
 
 senderinfo="$1"