1 files changed, 43 insertions, 0 deletions
diff --git a/hurd/hurdfchdir.c b/hurd/hurdfchdir.c
new file mode 100644
index 0000000000..efb705393e
--- /dev/null
+++ b/hurd/hurdfchdir.c
@@ -0,0 +1,43 @@
+/* Change a port cell to a directory in an open file descriptor.
+   Copyright (C) 1999 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., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <errno.h>
+#include <unistd.h>
+#include <hurd.h>
+#include <hurd/port.h>
+#include <hurd/fd.h>
+#include <fcntl.h>
+
+int
+_hurd_change_directory_port_from_fd (struct hurd_port *portcell, int fd)
+{
+  error_t err;
+  file_t dir;
+
+  err = HURD_DPORT_USE (fd,
+			({
+			  dir = __file_name_lookup_under (port, ".", 0, 0);
+			  dir == MACH_PORT_NULL ? errno : 0;
+			}));
+
+  if (! err)
+    _hurd_port_set (portcell, dir);
+
+  return err ? __hurd_fail (err) : 0;
+}