about summary refs log tree commit diff
path: root/sysdeps/mach/hurd/getsockopt.c
blob: c9075b539c81ddd8e3ba9fd30cd695eb8dc38d5b (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
/* Copyright (C) 1992-2023 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <https://www.gnu.org/licenses/>.  */

#include <errno.h>
#include <sys/socket.h>
#include <hurd.h>
#include <hurd/fd.h>
#include <hurd/socket.h>
#include <string.h>

/* Put the current value for socket FD's option OPTNAME at protocol level LEVEL
   into OPTVAL (which is *OPTLEN bytes long), and set *OPTLEN to the value's
   actual length.  Returns 0 on success, -1 for errors.  */

/* XXX should be __getsockopt ? */
int
getsockopt (int fd,
	    int level,
	    int optname,
	    void *optval,
	    socklen_t *optlen)
{
  error_t err;
  char *buf = optval;
  mach_msg_type_number_t buflen = *optlen;

  if (err = HURD_DPORT_USE (fd, __socket_getopt (port,
						 level, optname,
						 &buf, &buflen)))
    return __hurd_dfail (fd, err);

  if (*optlen > buflen)
    *optlen = buflen;
  if (buf != optval)
    {
      memcpy (optval, buf, *optlen);
      __vm_deallocate (__mach_task_self (), (vm_address_t) buf, buflen);
    }

  return 0;
}