Subject: Used for avoiding calling vbladed without arguments,
 and while at it, add the usage command line.
Author: David Martínez Moreno <ender@debian.org>
Date: 2005-10-28
Forwarded: no
Last-Update: 2007-04-08

--- a/vbladed
+++ b/vbladed
@@ -3,4 +3,14 @@
 # output is directed to syslogd
 #
 
+# Although logging goes to syslog, let's going to
+# protect ourselves against the most common way or
+# calling vbladed: without arguments.  While at it, we guard
+# ourselves against wrong number of parameters.
+if [ $# -lt 4 ]
+then
+    echo "usage: ./vblade <shelf> <slot> <ethn> <device>" >&2
+    exit 1
+fi
+
 sh -c "`dirname $0`/vblade $* < /dev/null 2>&1 | logger -t vbladed" &