blob: 8458cc1f77041f0ca578899583f8b1e57bf41c7d (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
|
/* Copyright (C) 1999-2020 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
<https://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;
}
|
