84 lines
2.8 KiB
C
84 lines
2.8 KiB
C
/* $NetBSD: wwrint.c,v 1.7 2003/08/07 11:17:44 agc Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 1983, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to Berkeley by
|
|
* Edward Wang at The University of California, Berkeley.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
#ifndef lint
|
|
#if 0
|
|
static char sccsid[] = "@(#)wwrint.c 8.1 (Berkeley) 6/6/93";
|
|
#else
|
|
__RCSID("$NetBSD: wwrint.c,v 1.7 2003/08/07 11:17:44 agc Exp $");
|
|
#endif
|
|
#endif /* not lint */
|
|
|
|
#include <unistd.h>
|
|
#include "ww.h"
|
|
#include "tt.h"
|
|
|
|
/*
|
|
* Tty input interrupt handler.
|
|
* (1) Read input into buffer (wwib*).
|
|
* (2) Set the interrupt flag if anything is read.
|
|
* Currently, the last is used to get out of the blocking
|
|
* select() in wwiomux().
|
|
* To avoid race conditions, we only modify wwibq in here, except
|
|
* when the buffer is empty; and everywhere else, we only change wwibp.
|
|
* It should be completely safe.
|
|
*/
|
|
void
|
|
wwrint(void)
|
|
{
|
|
int n;
|
|
|
|
wwnread++;
|
|
n = read(0, wwibq, wwibe - wwibq);
|
|
if (n > 0) {
|
|
if (tt.tt_rint)
|
|
n = (*tt.tt_rint)(wwibq, n);
|
|
if (n > 0) {
|
|
wwibq += n;
|
|
wwnreadc += n;
|
|
/*
|
|
* Hasten or delay the next checkpoint,
|
|
* as the case may be.
|
|
*/
|
|
if (tt.tt_checkpoint && !wwdocheckpoint)
|
|
(void) alarm(1);
|
|
wwsetintr();
|
|
}
|
|
} else if (n == 0)
|
|
wwnreadz++;
|
|
else
|
|
wwnreade++;
|
|
}
|