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1 | /* $OpenBSD: sshtty.c,v 1.1 2001/04/14 16:33:20 stevesk Exp $ */ | |
2 | /* | |
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 | ||
43 | static struct termios _saved_tio; | |
44 | static int _in_raw_mode = 0; | |
45 | ||
46 | int | |
47 | in_raw_mode(void) | |
48 | { | |
49 | return _in_raw_mode; | |
50 | } | |
51 | ||
52 | struct termios | |
53 | get_saved_tio(void) | |
54 | { | |
55 | return _saved_tio; | |
56 | } | |
57 | ||
58 | void | |
59 | leave_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 | ||
71 | void | |
72 | enter_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 | } |