X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=lib%2Flisten.c;h=b7d070e64bcde9edc598e1994694cc721bdf1652;hb=cea318a913148d825c03a4e45f4553e4cb4e2880;hp=49e0a08425e681c0afd867e710d92e01f19b2947;hpb=11ee0e1340f95ccb9954e522f6e003b3125eb109;p=gnulib.git

diff --git a/lib/listen.c b/lib/listen.c
index 49e0a0842..b7d070e64 100644
--- a/lib/listen.c
+++ b/lib/listen.c
@@ -1,6 +1,6 @@
 /* listen.c --- wrappers for Windows listen function
 
-   Copyright (C) 2008 Free Software Foundation, Inc.
+   Copyright (C) 2008-2011 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;
+    }
 }