1  /* Copyright (C) 1994-2023 Free Software Foundation, Inc.
       2     This file is part of the GNU C Library.
       3  
       4     The GNU C Library is free software; you can redistribute it and/or
       5     modify it under the terms of the GNU Lesser General Public
       6     License as published by the Free Software Foundation; either
       7     version 2.1 of the License, or (at your option) any later version.
       8  
       9     The GNU C Library 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 GNU
      12     Lesser General Public License for more details.
      13  
      14     You should have received a copy of the GNU Lesser General Public
      15     License along with the GNU C Library; if not, see
      16     <https://www.gnu.org/licenses/>.  */
      17  
      18  #include <stdio.h>
      19  #include <stdlib.h>
      20  #include <unistd.h>
      21  
      22  static int
      23  check (const char *name, FILE *stream, int fd)
      24  {
      25    int sfd = fileno (stream);
      26    printf ("(fileno (%s) = %d) %c= %d\n", name, sfd,
      27  	  sfd == fd ? '=' : '!', fd);
      28    return sfd != fd;
      29  }
      30  
      31  static int
      32  do_test (void)
      33  {
      34    return (check ("stdin", stdin, STDIN_FILENO)
      35  	  || check ("stdout", stdout, STDOUT_FILENO)
      36  	  || check ("stderr", stderr, STDERR_FILENO));
      37  }
      38  
      39  #define TEST_FUNCTION do_test ()
      40  #include "../test-skeleton.c"