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ttyflush.c
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1992-09-11
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54 lines
/*****************************************************************************
* Copyright (c) 1990, Intel Corporation
*
* Intel hereby grants you permission to copy, modify, and
* distribute this software and its documentation. Intel grants
* this permission provided that the above copyright notice
* appears in all copies and that both the copyright notice and
* this permission notice appear in supporting documentation. In
* addition, Intel grants this permission provided that you
* prominently mark as not part of the original any modifications
* made to this software or documentation, and that the name of
* Intel Corporation not be used in advertising or publicity
* pertaining to distribution of the software or the documentation
* without specific, written prior permission.
*
* Intel Corporation does not warrant, guarantee or make any
* representations regarding the use of, or the results of the use
* of, the software and documentation in terms of correctness,
* accuracy, reliability, currentness, or otherwise; and you rely
* on the software, documentation and results solely at your own risk.
*****************************************************************************/
static char rcsid[] =
"Id: ttyflush.c,v 1.1.1.1 1991/03/28 16:21:03 rich Exp $";
#include <stdio.h>
#include <fcntl.h> /* Needed on Sys V */
#include "ttycntl.h"
/******************************************************************************
* tty_flush:
*
* This routine puts the specified tty into a quiescent state by flushing
* all pending input and output.
*
* The tty is assumed to be connected to an i960 board containing a
* a NINDY ROM; since the 960 may be generating output, we wait until
* at least one second goes by without anything new arriving.
******************************************************************************/
tty_flush( fd )
int fd; /* File descriptor of tty line */
{
int n; /* Number of characters of pending input */
char c; /* Next character of input (discarded) */
do {
TTY_FLUSH( fd );
sleep(1);
n = 1;
TTY_NBREAD( fd, n, &c ); /* Non-blocking read */
} while ( n > 0 );
}