cfsetispeed.c revision 7257d1b4d25bfac0c802847390e98a464fd787ac
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2008 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/* Copyright (c) 1988 AT&T */
/* All Rights Reserved */
#pragma ident "%Z%%M% %I% %E% SMI"
#pragma weak _cfsetispeed = cfsetispeed
#include "lint.h"
#include <sys/types.h>
#include <sys/termios.h>
/*
* sets the input baud rate stored in c_cflag to speed
*/
int
cfsetispeed(struct termios *termios_p, speed_t speed)
{
/*
* If the input speed is zero, set it to output speed
*/
if (speed == 0) {
speed = termios_p->c_cflag & CBAUD;
if (termios_p->c_cflag & CBAUDEXT)
speed += (CBAUD + 1);
}
if ((speed << 16) > CIBAUD) {
termios_p->c_cflag |= CIBAUDEXT;
speed -= ((CIBAUD >> 16) + 1);
} else
termios_p->c_cflag &= ~CIBAUDEXT;
termios_p->c_cflag =
(termios_p->c_cflag & ~CIBAUD) | ((speed << 16) & CIBAUD);
return (0);
}