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
50
51
52
53
54
55
56
57
58
59
|
/* Change a port cell to a directory in an open file descriptor.
Copyright (C) 1999, 2002 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, 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)
{
int ret;
struct hurd_fd *d = _hurd_fd_get (fd);
if (!d)
return __hurd_fail (EBADF);
HURD_CRITICAL_BEGIN;
ret = HURD_PORT_USE (&d->port,
({
int ret;
/* We look up "." to force ENOTDIR if it's not a
directory and EACCES if we don't have search
permission. */
file_t dir = __file_name_lookup_under (port, ".",
O_NOTRANS, 0);
if (dir == MACH_PORT_NULL)
ret = -1;
else
{
_hurd_port_set (portcell, dir);
ret = 0;
}
ret;
}));
HURD_CRITICAL_END;
return ret;
}
|
