1  /* Test of <sys/socket.h> substitute.
       2     Copyright (C) 2007, 2009-2023 Free Software Foundation, Inc.
       3  
       4     This program is free software: you can redistribute it and/or modify
       5     it under the terms of the GNU General Public License as published by
       6     the Free Software Foundation, either version 3 of the License, or
       7     (at your option) any later version.
       8  
       9     This program 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
      12     GNU General Public License for more details.
      13  
      14     You should have received a copy of the GNU General Public License
      15     along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
      16  
      17  /* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
      18  
      19  #include <config.h>
      20  
      21  #include <sys/socket.h>
      22  
      23  #if HAVE_SHUTDOWN
      24  /* Check some integer constant expressions.  */
      25  int a[] = { SHUT_RD, SHUT_WR, SHUT_RDWR };
      26  #endif
      27  
      28  /* Check that the 'socklen_t' type is defined.  */
      29  socklen_t t1;
      30  
      31  /* Check that the 'size_t' and 'ssize_t' types are defined.  */
      32  size_t t2;
      33  ssize_t t3;
      34  
      35  /* Check that 'struct iovec' is defined.  */
      36  struct iovec io;
      37  
      38  /* Check that a minimal set of 'struct msghdr' is defined.  */
      39  struct msghdr msg;
      40  
      41  #include <errno.h>
      42  
      43  int
      44  main (void)
      45  {
      46    struct sockaddr_storage x;
      47    sa_family_t i;
      48  
      49    /* Check some errno values.  */
      50    switch (ENOTSOCK)
      51      {
      52      case ENOTSOCK:
      53      case EADDRINUSE:
      54      case ENETRESET:
      55      case ECONNABORTED:
      56      case ECONNRESET:
      57      case ENOTCONN:
      58      case ESHUTDOWN:
      59        break;
      60      }
      61  
      62    x.ss_family = 42;
      63    i = 42;
      64    msg.msg_iov = &io;
      65  
      66    return (x.ss_family - i + msg.msg_namelen + msg.msg_iov->iov_len
      67            + msg.msg_iovlen);
      68  }