Update.
[glibc.git] / hurd / hurdfchdir.c
blob4a01f0719c2762cd32515fea491cd96e6a9283a6
1 /* Change a port cell to a directory in an open file descriptor.
2 Copyright (C) 1999 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Library General Public License as
7 published by the Free Software Foundation; either version 2 of the
8 License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Library General Public License for more details.
15 You should have received a copy of the GNU Library General Public
16 License along with the GNU C Library; see the file COPYING.LIB. If not,
17 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA. */
20 #include <errno.h>
21 #include <unistd.h>
22 #include <hurd.h>
23 #include <hurd/port.h>
24 #include <hurd/fd.h>
25 #include <fcntl.h>
27 int
28 _hurd_change_directory_port_from_fd (struct hurd_port *portcell, int fd)
30 int ret;
31 struct hurd_fd *d = _hurd_fd_get (fd);
33 if (!d)
34 return __hurd_fail (EBADF);
36 HURD_CRITICAL_BEGIN;
38 ret = HURD_PORT_USE (&d->port,
40 int ret;
41 file_t dir = __file_name_lookup_under (port, ".",
42 0, 0);
43 if (dir == MACH_PORT_NULL)
44 ret = -1;
45 else
47 _hurd_port_set (portcell, dir);
48 ret = 0;
50 ret;
51 }));
53 HURD_CRITICAL_END;
55 return ret;