1  /* Test listen() function.
       2     Copyright (C) 2011-2023 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  #include <config.h>
      18  
      19  #include <sys/socket.h>
      20  
      21  #include "signature.h"
      22  SIGNATURE_CHECK (listen, int, (int, int));
      23  
      24  #include <errno.h>
      25  #include <unistd.h>
      26  
      27  #include "sockets.h"
      28  #include "macros.h"
      29  
      30  /* Tell GCC not to warn about the specific edge cases tested here.  */
      31  #if __GNUC__ >= 13
      32  # pragma GCC diagnostic ignored "-Wanalyzer-fd-use-without-check"
      33  #endif
      34  
      35  int
      36  main (void)
      37  {
      38    (void) gl_sockets_startup (SOCKETS_1_1);
      39  
      40    /* Test behaviour for invalid file descriptors.  */
      41    {
      42      errno = 0;
      43      ASSERT (listen (-1, 1) == -1);
      44      ASSERT (errno == EBADF);
      45    }
      46    {
      47      close (99);
      48      errno = 0;
      49      ASSERT (listen (99 ,1) == -1);
      50      ASSERT (errno == EBADF);
      51    }
      52  
      53    return 0;
      54  }