glibc/stdio-common/tst-fileno.c

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1995-02-18 01:27:10 +00:00
/* Copyright (C) 1994 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA. */
#include <ansidecl.h>
#include <stdio.h>
#include <unistd.h>
static int
DEFUN(check, (name, stream, fd), CONST char *name AND FILE *stream AND int fd)
{
int sfd = fileno (stream);
printf ("(fileno (%s) = %d) %c= %d\n", name, sfd, sfd == fd ? '=' : '!', fd);
return sfd != fd;
}
int
DEFUN_VOID(main)
{
exit (check ("stdin", stdin, STDIN_FILENO) ||
check ("stdout", stdout, STDOUT_FILENO) ||
check ("stderr", stderr, STDERR_FILENO));
}