diff -up lockdev-1.0.1/src/sample.c.kzak lockdev-1.0.1/src/sample.c
--- lockdev-1.0.1/src/sample.c.kzak	2008-10-06 11:29:48.000000000 +0200
+++ lockdev-1.0.1/src/sample.c	2008-10-06 11:30:26.000000000 +0200
@@ -1,4 +1,8 @@
 #include <stdio.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <unistd.h>
+
 #include "lockdev.h"
 
 void
@@ -13,7 +17,7 @@ int debug;
 int
 main(int argc, char *argv[])
 {
-	int i, chld;
+	int i;
 	char *p = NULL, *dev = NULL, ch;
 
 	ch = '\0';