Annotation of src/usr.bin/ssh/sshtty.c, Revision 1.1.4.2
1.1.4.1 jason 1: /* $OpenBSD: sshtty.c,v 1.1 2001/04/14 16:33:20 stevesk Exp $ */
1.1 stevesk 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: }