1 /* $OpenBSD: sshtty.c,v 1.14 2010/01/09 05:04:24 djm 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 <sys/types.h>
41 #include <stdio.h>
42 #include <termios.h>
43 #include <pwd.h>
44
45 #include "sshpty.h"
46
47 static struct termios _saved_tio;
48 static int _in_raw_mode = 0;
49
50 struct termios *
get_saved_tio(void)51 get_saved_tio(void)
52 {
53 return _in_raw_mode ? &_saved_tio : NULL;
54 }
55
56 void
leave_raw_mode(int quiet)57 leave_raw_mode(int quiet)
58 {
59 if (!_in_raw_mode)
60 return;
61 if (tcsetattr(fileno(stdin), TCSADRAIN, &_saved_tio) == -1) {
62 if (!quiet)
63 perror("tcsetattr");
64 } else
65 _in_raw_mode = 0;
66 }
67
68 void
enter_raw_mode(int quiet)69 enter_raw_mode(int quiet)
70 {
71 struct termios tio;
72
73 if (tcgetattr(fileno(stdin), &tio) == -1) {
74 if (!quiet)
75 perror("tcgetattr");
76 return;
77 }
78 _saved_tio = tio;
79 tio.c_iflag |= IGNPAR;
80 tio.c_iflag &= ~(ISTRIP | INLCR | IGNCR | ICRNL | IXON | IXANY | IXOFF);
81 #ifdef IUCLC
82 tio.c_iflag &= ~IUCLC;
83 #endif
84 tio.c_lflag &= ~(ISIG | ICANON | ECHO | ECHOE | ECHOK | ECHONL);
85 #ifdef IEXTEN
86 tio.c_lflag &= ~IEXTEN;
87 #endif
88 tio.c_oflag &= ~OPOST;
89 tio.c_cc[VMIN] = 1;
90 tio.c_cc[VTIME] = 0;
91 if (tcsetattr(fileno(stdin), TCSADRAIN, &tio) == -1) {
92 if (!quiet)
93 perror("tcsetattr");
94 } else
95 _in_raw_mode = 1;
96 }
97