/* Test of <sys/socket.h> substitute.

   Copyright (C) 2007, 2009-2020 Free Software Foundation, Inc.

   This program is free software: you can redistribute it and/or modify

   it under the terms of the GNU General Public License as published by

   the Free Software Foundation; either version 3 of the License, or

   (at your option) any later version.

   This program 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 General Public License for more details.

   You should have received a copy of the GNU General Public License

   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */

/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */

#include <config.h>

#include <sys/socket.h>

#include <errno.h>

#if HAVE_SHUTDOWN

/* Check some integer constant expressions.  */

int a[] = { SHUT_RD, SHUT_WR, SHUT_RDWR };

#endif

/* Check that the 'socklen_t' type is defined.  */

socklen_t t1;

/* Check that the 'size_t' and 'ssize_t' types are defined.  */

size_t t2;

ssize_t t3;

/* Check that 'struct iovec' is defined.  */

struct iovec io;

/* Check that a minimal set of 'struct msghdr' is defined.  */

struct msghdr msg;

int

main (void)

{

  struct sockaddr_storage x;

  sa_family_t i;

  /* Check some errno values.  */

  switch (ENOTSOCK)

    {

    case ENOTSOCK:

    case EADDRINUSE:

    case ENETRESET:

    case ECONNABORTED:

    case ECONNRESET:

    case ENOTCONN:

    case ESHUTDOWN:

      break;

    }

  x.ss_family = 42;

  i = 42;

  msg.msg_iov = &io;

  return (x.ss_family - i + msg.msg_namelen + msg.msg_iov->iov_len

          + msg.msg_iovlen);

}