1 files changed, 5 insertions, 0 deletions
diff --git a/src/io/fd.cpp b/src/io/fd.cpp
index c0b44e8..bb0bbd5 100644
--- a/src/io/fd.cpp
+++ b/src/io/fd.cpp
@@ -102,6 +102,11 @@ namespace io
 
     int FD::close()
     {
+        if (fd == -1)
+        {
+            errno = EBADF;
+            return -1;
+        }
         return ::close(fd);
     }
     int FD::shutdown(int how)