1 files changed, 46 insertions, 0 deletions
diff --git a/hurd/fd-close.c b/hurd/fd-close.c
new file mode 100644
index 0000000000..54beb2a09a
--- /dev/null
+++ b/hurd/fd-close.c
@@ -0,0 +1,46 @@
+/* Copyright (C) 1994, 1995 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#include <hurd/fd.h>
+
+error_t
+_hurd_fd_close (struct hurd_fd *fd)
+{
+  error_t err;
+
+  HURD_CRITICAL_BEGIN;
+
+  __spin_lock (&fd->port.lock);
+  if (fd->port.port == MACH_PORT_NULL)
+    {
+      __spin_unlock (&fd->port.lock);
+      err = EBADF;
+    }
+  else
+    {
+      /* Clear the descriptor's port cells.
+	 This deallocates the ports if noone else is still using them.  */
+      _hurd_port_set (&fd->ctty, MACH_PORT_NULL);
+      _hurd_port_locked_set (&fd->port, MACH_PORT_NULL);
+      err = 0;
+    }
+
+  HURD_CRITICAL_END;
+
+  return err;
+}