diff --git a/constants.c b/constants.c
new file mode 100644
index 0000000..9b69143
--- /dev/null
+++ b/constants.c
@@ -0,0 +1,11 @@
+#include <stdio.h>
+#include <sys/socket.h>
+#include <fcntl.h>
+
+//    printf("x %d\n", x);
+void main() {
+    printf("AF_UNIX     %d\n", AF_UNIX);
+    printf("SOCK_STREAM %d\n", SOCK_STREAM);
+    printf("F_GETFL     %d\n", F_GETFL);
+    printf("F_SETFL     %d\n", F_SETFL);
+}