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e8f51d56 | 1 | /* Change a port cell to a directory by looking up a name. |
96c4df50 | 2 | Copyright (C) 1999,2001,02 Free Software Foundation, Inc. |
e8f51d56 RM |
3 | This file is part of the GNU C Library. |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
41bdb6e2 AJ |
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. | |
e8f51d56 RM |
9 | |
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 | |
41bdb6e2 | 13 | Lesser General Public License for more details. |
e8f51d56 | 14 | |
41bdb6e2 AJ |
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. */ | |
e8f51d56 RM |
19 | |
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> | |
8a0746ae | 26 | #include <string.h> |
e8f51d56 RM |
27 | |
28 | int | |
29 | _hurd_change_directory_port_from_name (struct hurd_port *portcell, | |
30 | const char *name) | |
31 | { | |
32 | size_t len; | |
33 | const char *lookup; | |
34 | file_t dir; | |
35 | ||
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); | |
96c4df50 | 39 | if (len >= 2 && name[len - 2] == '/' && name[len - 1] == '.') |
e8f51d56 RM |
40 | lookup = name; |
41 | else | |
42 | { | |
ab7dd85b | 43 | char *n = alloca (len + 3); |
e8f51d56 RM |
44 | memcpy (n, name, len); |
45 | n[len] = '/'; | |
46 | n[len + 1] = '.'; | |
47 | n[len + 2] = '\0'; | |
48 | lookup = n; | |
49 | } | |
50 | ||
51 | dir = __file_name_lookup (lookup, 0, 0); | |
52 | if (dir == MACH_PORT_NULL) | |
53 | return -1; | |
54 | ||
55 | _hurd_port_set (portcell, dir); | |
56 | return 0; | |
57 | } |