X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=lib%2Flisten.c;h=0ca834628e29d61407f960ef41a499f25862c1fe;hb=43593319b31e6b0175b8eec4433bac744959822d;hp=4a77de22ea240b37736cb4454e0daf1aa805ae5a;hpb=b2e2010c7c902235b5efb5bd3c6529f61b093aa4;p=gnulib.git

diff --git a/lib/listen.c b/lib/listen.c
index 4a77de22e..0ca834628 100644
--- a/lib/listen.c
+++ b/lib/listen.c
@@ -1,6 +1,6 @@
 /* listen.c --- wrappers for Windows listen function
 
-   Copyright (C) 2008, 2009, 2010 Free Software Foundation, Inc.
+   Copyright (C) 2008-2013 Free Software Foundation, Inc.
 
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -32,9 +32,18 @@ int
 rpl_listen (int fd, int backlog)
 {
   SOCKET sock = FD_TO_SOCKET (fd);
-  int r = listen (sock, backlog);
-  if (r < 0)
-    set_winsock_errno ();
 
-  return r;
+  if (sock == INVALID_SOCKET)
+    {
+      errno = EBADF;
+      return -1;
+    }
+  else
+    {
+      int r = listen (sock, backlog);
+      if (r < 0)
+        set_winsock_errno ();
+
+      return r;
+    }
 }