1/*	$NetBSD: sshtty.c,v 1.7 2017/04/18 18:41:46 christos Exp $	*/
2/* $OpenBSD: sshtty.c,v 1.14 2010/01/09 05:04:24 djm Exp $ */
3/*
4 * Author: Tatu Ylonen <ylo@cs.hut.fi>
5 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
6 *                    All rights reserved
7 *
8 * As far as I am concerned, the code I have written for this software
9 * can be used freely for any purpose.  Any derived versions of this
10 * software must be clearly marked as such, and if the derived work is
11 * incompatible with the protocol description in the RFC file, it must be
12 * called by a name other than "ssh" or "Secure Shell".
13 */
14/*
15 * Copyright (c) 2001 Markus Friedl.  All rights reserved.
16 * Copyright (c) 2001 Kevin Steves.  All rights reserved.
17 *
18 * Redistribution and use in source and binary forms, with or without
19 * modification, are permitted provided that the following conditions
20 * are met:
21 * 1. Redistributions of source code must retain the above copyright
22 *    notice, this list of conditions and the following disclaimer.
23 * 2. Redistributions in binary form must reproduce the above copyright
24 *    notice, this list of conditions and the following disclaimer in the
25 *    documentation and/or other materials provided with the distribution.
26 *
27 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
28 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
29 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
30 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
31 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
32 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
33 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
34 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
35 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
36 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
37 */
38
39#include "includes.h"
40__RCSID("$NetBSD: sshtty.c,v 1.7 2017/04/18 18:41:46 christos Exp $");
41#include <sys/types.h>
42#include <stdio.h>
43#include <termios.h>
44#include <pwd.h>
45
46#include "sshpty.h"
47
48static struct termios _saved_tio;
49static int _in_raw_mode = 0;
50
51struct termios *
52get_saved_tio(void)
53{
54	return _in_raw_mode ? &_saved_tio : NULL;
55}
56
57void
58leave_raw_mode(int quiet)
59{
60	if (!_in_raw_mode)
61		return;
62	if (tcsetattr(fileno(stdin), TCSADRAIN, &_saved_tio) == -1) {
63		if (!quiet)
64			perror("tcsetattr");
65	} else
66		_in_raw_mode = 0;
67}
68
69void
70enter_raw_mode(int quiet)
71{
72	struct termios tio;
73
74	if (tcgetattr(fileno(stdin), &tio) == -1) {
75		if (!quiet)
76			perror("tcgetattr");
77		return;
78	}
79	_saved_tio = tio;
80	tio.c_iflag |= IGNPAR;
81	tio.c_iflag &= ~(ISTRIP | INLCR | IGNCR | ICRNL | IXON | IXANY | IXOFF);
82#ifdef IUCLC
83	tio.c_iflag &= ~IUCLC;
84#endif
85	tio.c_lflag &= ~(ISIG | ICANON | ECHO | ECHOE | ECHOK | ECHONL);
86#ifdef IEXTEN
87	tio.c_lflag &= ~IEXTEN;
88#endif
89	tio.c_oflag &= ~OPOST;
90	tio.c_cc[VMIN] = 1;
91	tio.c_cc[VTIME] = 0;
92	if (tcsetattr(fileno(stdin), TCSADRAIN, &tio) == -1) {
93		if (!quiet)
94			perror("tcsetattr");
95	} else
96		_in_raw_mode = 1;
97}
98