From f561f644e97894f6d4f07d43ae46f84dc0c4d7a4 Mon Sep 17 00:00:00 2001
From: Christopher Faylor <me@cgf.cx>
Date: Thu, 9 May 2002 22:55:08 +0000
Subject: [PATCH] * syscalls.cc (_write): Change error to EBADF if attempt to
 write to a non-writable fd.

---
 winsup/cygwin/ChangeLog   | 5 +++++
 winsup/cygwin/syscalls.cc | 3 +++
 2 files changed, 8 insertions(+)

diff --git a/winsup/cygwin/ChangeLog b/winsup/cygwin/ChangeLog
index e33b5bdfb..7584ed169 100644
--- a/winsup/cygwin/ChangeLog
+++ b/winsup/cygwin/ChangeLog
@@ -1,3 +1,8 @@
+2002-05-09  Christopher Faylor  <cgf@redhat.com>
+
+	* syscalls.cc (_write): Change error to EBADF if attempt to write to a
+	non-writable fd.
+
 2002-05-08  Corinna Vinschen  <corinna@vinschen.de>
 
 	* cygheap.h (class cygheap_user): Add member `orig_psid'.
diff --git a/winsup/cygwin/syscalls.cc b/winsup/cygwin/syscalls.cc
index b549f9530..0be393a46 100644
--- a/winsup/cygwin/syscalls.cc
+++ b/winsup/cygwin/syscalls.cc
@@ -384,6 +384,9 @@ _write (int fd, const void *ptr, size_t len)
       myself->process_state |= PID_TTYOU;
       res = cfd->write (ptr, len);
       myself->process_state &= ~PID_TTYOU;
+      if (res && get_errno () == EACCES &&
+	  !(cfd->get_flags () & (O_WRONLY | O_RDWR)))
+	set_errno (EBADF);
     }
 
 done: