From 3cf55f763ef8c75e8e8c11fca3c3e564668aee52 Mon Sep 17 00:00:00 2001
From: Ben Longbons <b.r.longbons@gmail.com>
Date: Sat, 8 Nov 2014 17:53:18 -0800
Subject: Make it easier to debug scripts, especially from coredumps

---
 src/io/fd.cpp | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'src/io')

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)
-- 
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