Update.
[glibc.git] / hurd / hurdchdir.c
blob9cb7aa2d3aebe2d7d77c4b3051184430be7f597d
1 /* Change a port cell to a directory by looking up a name.
2 Copyright (C) 1999, 2001 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>
26 #include <string.h>
28 int
29 _hurd_change_directory_port_from_name (struct hurd_port *portcell,
30 const char *name)
32 size_t len;
33 const char *lookup;
34 file_t dir;
36 /* Append trailing "/." to directory name to force ENOTDIR if it's not a
37 directory and EACCES if we don't have search permission. */
38 len = strlen (name);
39 if (name[len - 2] == '/' && name[len - 1] == '.')
40 lookup = name;
41 else
43 char *n = alloca (len + 2);
44 memcpy (n, name, len);
45 n[len] = '/';
46 n[len + 1] = '.';
47 n[len + 2] = '\0';
48 lookup = n;
51 dir = __file_name_lookup (lookup, 0, 0);
52 if (dir == MACH_PORT_NULL)
53 return -1;
55 _hurd_port_set (portcell, dir);
56 return 0;