1 | /* Copyright (C) 1992-2022 Free Software Foundation, Inc. |
2 | This file is part of the GNU C Library. |
3 | |
4 | The GNU C Library is free software; you can redistribute it and/or |
5 | modify it under the terms of the GNU Lesser General Public |
6 | License as published by the Free Software Foundation; either |
7 | version 2.1 of the License, or (at your option) any later version. |
8 | |
9 | The GNU C Library is distributed in the hope that it will be useful, |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
12 | Lesser General Public License for more details. |
13 | |
14 | You should have received a copy of the GNU Lesser General Public |
15 | License along with the GNU C Library; if not, see |
16 | <https://www.gnu.org/licenses/>. */ |
17 | |
18 | #include <errno.h> |
19 | #include <sys/socket.h> |
20 | #include <hurd.h> |
21 | #include <hurd/fd.h> |
22 | #include <hurd/socket.h> |
23 | #include <string.h> |
24 | |
25 | /* Put the current value for socket FD's option OPTNAME at protocol level LEVEL |
26 | into OPTVAL (which is *OPTLEN bytes long), and set *OPTLEN to the value's |
27 | actual length. Returns 0 on success, -1 for errors. */ |
28 | |
29 | /* XXX should be __getsockopt ? */ |
30 | int |
31 | getsockopt (int fd, |
32 | int level, |
33 | int optname, |
34 | void *optval, |
35 | socklen_t *optlen) |
36 | { |
37 | error_t err; |
38 | char *buf = optval; |
39 | mach_msg_type_number_t buflen = *optlen; |
40 | |
41 | if (err = HURD_DPORT_USE (fd, __socket_getopt (port, |
42 | level, optname, |
43 | &buf, &buflen))) |
44 | return __hurd_dfail (fd, err); |
45 | |
46 | if (*optlen > buflen) |
47 | *optlen = buflen; |
48 | if (buf != optval) |
49 | { |
50 | memcpy (optval, buf, *optlen); |
51 | __vm_deallocate (__mach_task_self (), (vm_address_t) buf, buflen); |
52 | } |
53 | |
54 | return 0; |
55 | } |
56 | |