--- libaitio/example/test_exec.c	2013/12/05 12:45:53	1.1.2.1
+++ libaitio/example/test_exec.c	2013/12/05 14:12:25	1.1.2.3
@@ -1,12 +1,32 @@
 #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;
 
+	p = io_progInit(argv[1], 3, 10);
+	if (!p) {
+		ELIBERR(io);
+		return 2;
+	} else {
+		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;
 }