-/* Copyright (C) 1991, 1992, 1993, 1994 Free Software Foundation, Inc.
-This file is part of the GNU C Library.
+/* Copyright (C) 1999-2019 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 free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 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.
+ 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
+ Lesser 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. */
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
-#include <ansidecl.h>
#include <unistd.h>
+
#include <hurd.h>
#include <hurd/fd.h>
+#include <hurd/port.h>
/* Change the current root directory to FD. */
int
-DEFUN(fchroot, (fd), int fd)
+fchroot (int fd)
{
error_t err;
file_t dir;
- err = __USEPORT (CRDIR,
- ({ file_t crdir = port;
- HURD_DPORT_USE (fd,
- __hurd_file_name_lookup (crdir, port, "",
- 0, 0, &dir));
- }));
+ err = HURD_DPORT_USE (fd,
+ ({
+ dir = __file_name_lookup_under (port, ".", 0, 0);
+ dir == MACH_PORT_NULL ? errno : 0;
+ }));
+
+ if (! err)
+ {
+ file_t root;
- if (err)
- return __hurd_fail (err);
+ /* Prevent going through DIR's .. */
+ err = __file_reparent (dir, MACH_PORT_NULL, &root);
+ __mach_port_deallocate (__mach_task_self (), dir);
+ if (! err)
+ _hurd_port_set (&_hurd_ports[INIT_PORT_CRDIR], root);
+ }
- _hurd_port_set (&_hurd_ports[INIT_PORT_CRDIR], dir);
- return 0;
+ return err ? __hurd_fail (err) : 0;
}