1  /* Test opening a stream with a file descriptor.
       2     Copyright (C) 2011-2022 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 <stdio.h>
      20  
      21  #include "signature.h"
      22  SIGNATURE_CHECK (fdopen, FILE *, (int, const char *));
      23  
      24  #include <errno.h>
      25  #include <unistd.h>
      26  
      27  #include "macros.h"
      28  
      29  int
      30  main (void)
      31  {
      32    /* Test behavior on failure.  POSIX makes it hard to check for
      33       failure, since the behavior is not well-defined on invalid file
      34       descriptors, so try fdopen 1000 times and if that's not enough to
      35       fail due to EMFILE, so be it.  */
      36  
      37    int i;
      38    for (i = 0; i < 1000; i++)
      39      {
      40        errno = 0;
      41        if (! fdopen (STDOUT_FILENO, "w"))
      42          {
      43            ASSERT (errno != 0);
      44            break;
      45          }
      46      }
      47  
      48    return 0;
      49  }