blob: eed8cfdc21badbb45368b495cb0e90f1b187a11f [file] [log] [blame]
Damien Miller9f0f5c62001-12-21 14:45:46 +11001/* $OpenBSD: sshtty.c,v 1.2 2001/12/19 07:18:56 deraadt Exp $ */
Ben Lindstrome626cf82001-04-14 23:21:50 +00002/*
3 * Author: Tatu Ylonen <ylo@cs.hut.fi>
4 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
5 * All rights reserved
6 *
7 * As far as I am concerned, the code I have written for this software
8 * can be used freely for any purpose. Any derived versions of this
9 * software must be clearly marked as such, and if the derived work is
10 * incompatible with the protocol description in the RFC file, it must be
11 * called by a name other than "ssh" or "Secure Shell".
12 */
13/*
14 * Copyright (c) 2001 Markus Friedl. All rights reserved.
15 * Copyright (c) 2001 Kevin Steves. All rights reserved.
16 *
17 * Redistribution and use in source and binary forms, with or without
18 * modification, are permitted provided that the following conditions
19 * are met:
20 * 1. Redistributions of source code must retain the above copyright
21 * notice, this list of conditions and the following disclaimer.
22 * 2. Redistributions in binary form must reproduce the above copyright
23 * notice, this list of conditions and the following disclaimer in the
24 * documentation and/or other materials provided with the distribution.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
27 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
28 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
29 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
30 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
31 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
32 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
33 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
34 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
35 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include "includes.h"
39
40#include "sshtty.h"
41#include "log.h"
42
43static struct termios _saved_tio;
44static int _in_raw_mode = 0;
45
46int
47in_raw_mode(void)
48{
Damien Miller9f0f5c62001-12-21 14:45:46 +110049 return _in_raw_mode;
Ben Lindstrome626cf82001-04-14 23:21:50 +000050}
51
52struct termios
53get_saved_tio(void)
54{
55 return _saved_tio;
56}
57
58void
59leave_raw_mode(void)
60{
61 if (!_in_raw_mode)
62 return;
63 if (tcsetattr(fileno(stdin), TCSADRAIN, &_saved_tio) == -1)
64 perror("tcsetattr");
65 else
66 _in_raw_mode = 0;
67
68 fatal_remove_cleanup((void (*) (void *)) leave_raw_mode, NULL);
69}
70
71void
72enter_raw_mode(void)
73{
74 struct termios tio;
75
76 if (tcgetattr(fileno(stdin), &tio) == -1) {
77 perror("tcgetattr");
78 return;
79 }
80 _saved_tio = tio;
81 tio.c_iflag |= IGNPAR;
82 tio.c_iflag &= ~(ISTRIP | INLCR | IGNCR | ICRNL | IXON | IXANY | IXOFF);
83 tio.c_lflag &= ~(ISIG | ICANON | ECHO | ECHOE | ECHOK | ECHONL);
84#ifdef IEXTEN
85 tio.c_lflag &= ~IEXTEN;
86#endif
87 tio.c_oflag &= ~OPOST;
88 tio.c_cc[VMIN] = 1;
89 tio.c_cc[VTIME] = 0;
90 if (tcsetattr(fileno(stdin), TCSADRAIN, &tio) == -1)
91 perror("tcsetattr");
92 else
93 _in_raw_mode = 1;
94
95 fatal_add_cleanup((void (*) (void *)) leave_raw_mode, NULL);
96}