Remove use of btr/bts instructions, which NaCl rejects
[glibc/nacl-glibc.git] / hurd / hurdfchdir.c
blob2e6a120c536b828b276edd08f9ae840471d1b5ec
1 /* Change a port cell to a directory in an open file descriptor.
2 Copyright (C) 1999, 2002 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 Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the 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 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, write to the Free
17 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
18 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 /* We look up "." to force ENOTDIR if it's not a
42 directory and EACCES if we don't have search
43 permission. */
44 file_t dir = __file_name_lookup_under (port, ".",
45 O_NOTRANS, 0);
46 if (dir == MACH_PORT_NULL)
47 ret = -1;
48 else
50 _hurd_port_set (portcell, dir);
51 ret = 0;
53 ret;
54 }));
56 HURD_CRITICAL_END;
58 return ret;