From 71cc46292ce4c9b36ed548012d293ade019e48ee Mon Sep 17 00:00:00 2001
From: hyung-hwan <hyunghwan.chung@gmail.com>
Date: Tue, 4 Jul 2023 12:49:47 +0900
Subject: [PATCH] updated the ffi section in README.md

---
 README.md | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/README.md b/README.md
index 5d79ef08..20d86904 100644
--- a/README.md
+++ b/README.md
@@ -481,6 +481,19 @@ BEGIN
 
 ### ffi
 
+- ffi::open
+- ffi::close
+- ffi::call
+- ffi::errmsg
+
+```
+BEGIN {
+	ffi = ffi::open();
+	if (ffi::call(ffi, r, @B"getenv", @B"s>s", "PATH") <= -1) print ffi::errmsg();
+	else print r;
+	ffi::close (ffi);
+}
+```
 
 ### mysql