X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=lib%2Flisten.c;h=b7d070e64bcde9edc598e1994694cc721bdf1652;hb=b65bfcd7ba0be84de3d96f22103103f21679a721;hp=938aa7546037c43118be56860da5234c5cf6731f;hpb=d60f3b0c6b0f93a601acd1cfd3923f94ca05abb0;p=gnulib.git

diff --git a/lib/listen.c b/lib/listen.c
index 938aa7546..b7d070e64 100644
--- a/lib/listen.c
+++ b/lib/listen.c
@@ -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;
+    }
 }