source: trunk/third/openssh/sshtty.c @ 18759

Revision 18759, 2.9 KB checked in by zacheiss, 22 years ago (diff)
This commit was generated by cvs2svn to compensate for changes in r18758, which included commits to RCS files with non-trunk default branches.
Line 
1/*
2 * Author: Tatu Ylonen <ylo@cs.hut.fi>
3 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
4 *                    All rights reserved
5 *
6 * As far as I am concerned, the code I have written for this software
7 * can be used freely for any purpose.  Any derived versions of this
8 * software must be clearly marked as such, and if the derived work is
9 * incompatible with the protocol description in the RFC file, it must be
10 * called by a name other than "ssh" or "Secure Shell".
11 */
12/*
13 * Copyright (c) 2001 Markus Friedl.  All rights reserved.
14 * Copyright (c) 2001 Kevin Steves.  All rights reserved.
15 *
16 * Redistribution and use in source and binary forms, with or without
17 * modification, are permitted provided that the following conditions
18 * are met:
19 * 1. Redistributions of source code must retain the above copyright
20 *    notice, this list of conditions and the following disclaimer.
21 * 2. Redistributions in binary form must reproduce the above copyright
22 *    notice, this list of conditions and the following disclaimer in the
23 *    documentation and/or other materials provided with the distribution.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
26 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
27 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
28 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
29 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
30 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
31 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
32 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
33 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
34 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
35 */
36
37#include "includes.h"
38RCSID("$OpenBSD: sshtty.c,v 1.3 2002/03/04 17:27:39 stevesk Exp $");
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{
49        return _in_raw_mode;
50}
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}
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