/* Copyright (C) 1999-2013 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 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 Lesser General Public License for more details. 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 <unistd.h> #include <hurd.h> #include <hurd/fd.h> #include <hurd/port.h> /* Change the current root directory to FD. */ int fchroot (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) { file_t root; /* 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); } return err ? __hurd_fail (err) : 0; }