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db11c38c | 1 | /* Copyright (C) 1999, 2001 Free Software Foundation, Inc. |
c84142e8 | 2 | This file is part of the GNU C Library. |
28f540f4 | 3 | |
c84142e8 | 4 | The GNU C Library is free software; you can redistribute it and/or |
41bdb6e2 AJ |
5 | modify it under the terms of the GNU Lesser General Public |
6 | License as published by the Free Software Foundation; either | |
7 | version 2.1 of the License, or (at your option) any later version. | |
28f540f4 | 8 | |
c84142e8 UD |
9 | The GNU C Library is distributed in the hope that it will be useful, |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
41bdb6e2 | 12 | Lesser General Public License for more details. |
28f540f4 | 13 | |
41bdb6e2 AJ |
14 | You should have received a copy of the GNU Lesser General Public |
15 | License along with the GNU C Library; if not, write to the Free | |
16 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
17 | 02111-1307 USA. */ | |
28f540f4 | 18 | |
28f540f4 | 19 | #include <unistd.h> |
db11c38c | 20 | |
28f540f4 RM |
21 | #include <hurd.h> |
22 | #include <hurd/fd.h> | |
db11c38c | 23 | #include <hurd/port.h> |
28f540f4 RM |
24 | |
25 | /* Change the current root directory to FD. */ | |
26 | int | |
c84142e8 | 27 | fchroot (int fd) |
28f540f4 | 28 | { |
db11c38c MK |
29 | error_t err; |
30 | file_t dir; | |
31 | ||
32 | err = HURD_DPORT_USE (fd, | |
33 | ({ | |
34 | dir = __file_name_lookup_under (port, ".", 0, 0); | |
35 | dir == MACH_PORT_NULL ? errno : 0; | |
36 | })); | |
37 | ||
38 | if (! err) | |
39 | { | |
40 | file_t root; | |
41 | ||
42 | /* Prevent going through DIR's .. */ | |
43 | err = __file_reparent (dir, MACH_PORT_NULL, &root); | |
44 | __mach_port_deallocate (__mach_task_self (), dir); | |
45 | if (! err) | |
46 | _hurd_port_set (&_hurd_ports[INIT_PORT_CRDIR], root); | |
47 | } | |
48 | ||
49 | return err ? __hurd_fail (err) : 0; | |
28f540f4 | 50 | } |