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"
38 RCSID("$OpenBSD: sshtty.c,v 1.3 2002/03/04 17:27:39 stevesk Exp $");
39
40 #pragma ident "%Z%%M% %I% %E% SMI"
41
42 #include "sshtty.h"
43 #include "log.h"
44
45 static struct termios _saved_tio;
46 static int _in_raw_mode = 0;
47
48 int
in_raw_mode(void)49 in_raw_mode(void)
50 {
51 return _in_raw_mode;
52 }
53
54 struct termios
get_saved_tio(void)55 get_saved_tio(void)
56 {
57 return _saved_tio;
58 }
59
60 void
leave_raw_mode(void)61 leave_raw_mode(void)
62 {
63 if (!_in_raw_mode)
64 return;
65 if (tcsetattr(fileno(stdin), TCSADRAIN, &_saved_tio) == -1)
66 perror("tcsetattr");
67 else
68 _in_raw_mode = 0;
69
70 fatal_remove_cleanup((void (*) (void *)) leave_raw_mode, NULL);
71 }
72
73 void
enter_raw_mode(void)74 enter_raw_mode(void)
75 {
76 struct termios tio;
77
78 if (tcgetattr(fileno(stdin), &tio) == -1) {
79 perror("tcgetattr");
80 return;
81 }
82 _saved_tio = tio;
83 tio.c_iflag |= IGNPAR;
84 tio.c_iflag &= ~(ISTRIP | INLCR | IGNCR | ICRNL | IXON | IXANY | IXOFF);
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 perror("tcsetattr");
94 else
95 _in_raw_mode = 1;
96
97 fatal_add_cleanup((void (*) (void *)) leave_raw_mode, NULL);
98 }
99