xref: /illumos-gate/usr/src/lib/libc/port/gen/cfgetispeed.c (revision 628e3cbed6489fa1db545d8524a06cd6535af456)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 
22 /*
23  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
24  * Use is subject to license terms.
25  */
26 
27 /*	Copyright (c) 1988 AT&T	*/
28 /*	  All Rights Reserved  	*/
29 
30 #pragma ident	"%Z%%M%	%I%	%E% SMI"
31 
32 #pragma weak _cfgetispeed = cfgetispeed
33 
34 #include "lint.h"
35 #include <sys/types.h>
36 #include <sys/termios.h>
37 
38 /*
39  * returns input baud rate stored in c_cflag pointed by termios_p
40  */
41 
42 speed_t
43 cfgetispeed(const struct termios *termios_p)
44 {
45 	return (termios_p->c_cflag & CIBAUDEXT ?
46 	    ((termios_p->c_cflag & CIBAUD) >> 16) + (CIBAUD >> 16) + 1 :
47 	    (termios_p->c_cflag & CIBAUD) >> 16);
48 }
49