X-Git-Url: https://git.gag.com/?a=blobdiff_plain;f=lib%2Fdup2.c;fp=lib%2Fdup2.c;h=9219eb38238629e84649330b18079773ee39a058;hb=d57728a6ca2413a7c564d8b7bb13d9e5a5a180f3;hp=f6d0f1c73c5aa3c1fe4d7b66c933d553885df7f6;hpb=dc84183747ce1703eb99685b5dbde1f65a143c06;p=debian%2Fgzip

diff --git a/lib/dup2.c b/lib/dup2.c
index f6d0f1c..9219eb3 100644
--- a/lib/dup2.c
+++ b/lib/dup2.c
@@ -1,6 +1,6 @@
 /* Duplicate an open file descriptor to a specified file descriptor.
 
-   Copyright (C) 1999, 2004-2007, 2009-2012 Free Software Foundation, Inc.
+   Copyright (C) 1999, 2004-2007, 2009-2013 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
@@ -95,7 +95,10 @@ rpl_dup2 (int fd, int desired_fd)
 # ifdef F_GETFL
   /* On Linux kernels 2.6.26-2.6.29, dup2 (fd, fd) returns -EBADF.
      On Cygwin 1.5.x, dup2 (1, 1) returns 0.
+     On Cygwin 1.7.17, dup2 (1, -1) dumps core.
      On Haiku, dup2 (fd, fd) mistakenly clears FD_CLOEXEC.  */
+  if (desired_fd < 0)
+    fd = desired_fd;
   if (fd == desired_fd)
     return fcntl (fd, F_GETFL) == -1 ? -1 : fd;
 # endif