Index: cronload
===================================================================
--- cronload	(revision 2312)
+++ cronload	(working copy)
@@ -1,5 +1,15 @@
 #!/bin/sh
 
+if [ -z "$1" ]; then
+  echo "ERROR: please specify a crontab file"
+  exit
+fi
+
+if [ ! -f "$1" ]; then
+  echo "ERROR: file does not exist"
+  exit
+fi
+
 if [ -n "$2" ]; then
   cd "$2"
 fi