--- libaitio/example/test_exec.c	2013/12/05 13:22:10	1.1.2.2
+++ libaitio/example/test_exec.c	2013/12/05 14:12:25	1.1.2.3
@@ -1,11 +1,13 @@
 #include <stdio.h>
 #include <aitio.h>
+#include <sys/wait.h>
 
 
 int
 main(int argc, char **argv)
 {
 	prog_t *p;
+	int stat;
 
 	if (argc < 2)
 		return 1;
@@ -18,6 +20,12 @@ main(int argc, char **argv)
 		printf("wait for keystroke %p ", p);
 		getchar();
 	}
+
+	printf("%d\n", waitpid(-1, &stat, WNOHANG));
+	printf("%d\n", waitpid(-1, &stat, WNOHANG));
+	printf("%d\n", waitpid(-1, &stat, WNOHANG));
+	printf("%d\n", waitpid(-1, &stat, WNOHANG));
+	printf("%d\n", waitpid(-1, &stat, WNOHANG));
 
 	io_progDestroy(&p);
 	return 0;