1 files changed, 7 insertions, 0 deletions

diff --git a/lcrawl b/lcrawl
index 2c087c5..0e6e113 100755
--- a/lcrawl
+++ b/lcrawl
@@ -27,4 +27,11 @@ function crawl() {
     fi
 }
 
+
+if [ $# -ne 4 ]; then
+    echo "Usage: $0 URL FILE-REGEX EXT-REGEX NEXT-REGEX"
+    exit 1
+fi
+
+
 crawl "$BASIS" 0
\ No newline at end of file