FFI: Add ffi.errno().

1 files changed, 8 insertions, 0 deletions

diff --git a/src/lib_ffi.c b/src/lib_ffi.c
index 27996f0e..321de499 100644
--- a/src/lib_ffi.c
+++ b/src/lib_ffi.c
@@ -6,6 +6,8 @@
 #define lib_ffi_c
 #define LUA_LIB
 
+#include <errno.h>
+
 #include "lua.h"
 #include "lauxlib.h"
 #include "lualib.h"
@@ -541,6 +543,12 @@ LJLIB_CF(ffi_offsetof)
   return 0;
 }
 
+LJLIB_CF(ffi_errno)
+{
+  setintV(L->top++, errno);
+  return 1;
+}
+
 LJLIB_CF(ffi_string)    LJLIB_REC(.)
 {
   CTState *cts = ctype_cts(L);