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/* Copyright (C) 1991 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 <errno.h>
#include <stdio.h>
#include <stdlib.h>
/* Flush STREAM's buffer.
If STREAM is NULL, flush the buffers of all streams that are writing. */
int
DEFUN(fflush, (stream), register FILE *stream)
{
if (stream == NULL)
{
int lossage = 0;
for (stream = __stdio_head; stream != NULL; stream = stream->__next)
if (__validfp(stream) && stream->__mode.__write)
lossage |= fflush(stream) == EOF;
return lossage ? EOF : 0;
}
if (!__validfp(stream) || !stream->__mode.__write)
{
errno = EINVAL;
return EOF;
}
return __flshfp(stream, EOF);
}
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