From ff3ef36d88dc4b3e632e30df7e077a573b77b3f7 Mon Sep 17 00:00:00 2001
From: Christopher Faylor <me@cgf.cx>
Date: Sat, 22 Mar 2003 18:30:58 +0000
Subject: [PATCH] * pipe.cc (fhandler_pipe::dup): Don't dup input_handle if it
 doesn't exist.

---
 winsup/cygwin/ChangeLog | 5 +++++
 winsup/cygwin/pipe.cc   | 9 ++++++---
 2 files changed, 11 insertions(+), 3 deletions(-)

diff --git a/winsup/cygwin/ChangeLog b/winsup/cygwin/ChangeLog
index 666dc3a78..c74f46fa6 100644
--- a/winsup/cygwin/ChangeLog
+++ b/winsup/cygwin/ChangeLog
@@ -1,3 +1,8 @@
+2003-03-22  Christopher Faylor  <cgf@redhat.com>
+
+	* pipe.cc (fhandler_pipe::dup): Don't dup input_handle if it doesn't
+	exist.
+
 2003-03-22  Christopher Faylor  <cgf@redhat.com>
 
 	* syscalls.cc (unlink): Be more defensive when SetFileAttributes is
diff --git a/winsup/cygwin/pipe.cc b/winsup/cygwin/pipe.cc
index f131fd43f..a84aeee60 100644
--- a/winsup/cygwin/pipe.cc
+++ b/winsup/cygwin/pipe.cc
@@ -133,9 +133,12 @@ fhandler_pipe::fixup_after_fork (HANDLE parent)
 int
 fhandler_pipe::dup (fhandler_base *child)
 {
-  int res = fhandler_base::dup (child);
-  if (res)
-    return res;
+  if (get_handle ())
+    {
+      int res = fhandler_base::dup (child);
+      if (res)
+	return res;
+    }
 
   fhandler_pipe *ftp = (fhandler_pipe *) child;