Index: cronload
===================================================================
--- cronload	(revision 2312)
+++ cronload	(working copy)
@@ -1,9 +1,19 @@
 #!/bin/sh
 
+if [ -z "$1" ]; then
+  echo "ERROR: please specify a crontab file" >&2
+  exit 1
+fi
+
 if [ -n "$2" ]; then
   cd "$2"
 fi
 
+if [ ! -f "$1" ]; then
+  echo "ERROR: file does not exist" >&2
+  exit 1
+fi
+
 /bin/cat "$1" | /usr/bin/crontab -
 
 echo "New crontab for $USER:"