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dff8da6b | 1 | /* Copyright (C) 1991-2024 Free Software Foundation, Inc. |
3dadfa7e | 2 | |
c84142e8 | 3 | This file is part of the GNU C Library. |
28f540f4 | 4 | |
c84142e8 | 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. | |
28f540f4 | 9 | |
c84142e8 UD |
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. |
28f540f4 | 14 | |
41bdb6e2 | 15 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 | 16 | License along with the GNU C Library; if not, see |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
28f540f4 RM |
18 | |
19 | #include <hurd.h> | |
20 | ||
21 | /* This is initialized in dtable.c when that gets linked in. | |
22 | If dtable.c is not linked in, it will be zero. */ | |
6bac11d9 MB |
23 | static file_t (*_default_hurd_getdport_fn) (int fd) = 0; |
24 | weak_alias (_default_hurd_getdport_fn, _hurd_getdport_fn) | |
28f540f4 RM |
25 | |
26 | file_t | |
27 | __getdport (int fd) | |
28 | { | |
29 | if (_hurd_getdport_fn) | |
30 | /* dtable.c has defined the function to fetch a port from the real file | |
31 | descriptor table. */ | |
32 | return (*_hurd_getdport_fn) (fd); | |
33 | ||
34 | /* getdport is the only use of file descriptors, | |
35 | so we don't bother allocating a real table. */ | |
36 | ||
37 | if (_hurd_init_dtable == NULL) | |
9ec31e57 SB |
38 | /* Never had a descriptor table. */ |
39 | return __hurd_fail (EBADF), MACH_PORT_NULL; | |
28f540f4 | 40 | |
34a5a146 JM |
41 | if (fd < 0 || (unsigned int) fd > _hurd_init_dtablesize |
42 | || _hurd_init_dtable[fd] == MACH_PORT_NULL) | |
9ec31e57 | 43 | return __hurd_fail (EBADF), MACH_PORT_NULL; |
c84142e8 | 44 | else |
28f540f4 RM |
45 | { |
46 | __mach_port_mod_refs (__mach_task_self (), _hurd_init_dtable[fd], | |
47 | MACH_PORT_RIGHT_SEND, 1); | |
48 | return _hurd_init_dtable[fd]; | |
49 | } | |
50 | } | |
51 | ||
52 | weak_alias (__getdport, getdport) |