blob: 21ade4e5153dc6ec9ab790ab728700f3049ec813 [file] [log] [blame]
Darren Tuckerdd392642008-06-08 12:53:20 +10001/* $OpenBSD: sshtty.c,v 1.13 2008/05/19 15:45:07 djm Exp $ */
Ben Lindstrome626cf82001-04-14 23:21:50 +00002/*
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"
Damien Miller99bd21e2006-03-15 11:11:28 +110039
Damien Millerd7834352006-08-05 12:39:39 +100040#include <sys/types.h>
Damien Millera7a73ee2006-08-05 11:37:59 +100041#include <stdio.h>
Damien Miller99bd21e2006-03-15 11:11:28 +110042#include <termios.h>
Damien Millerd7834352006-08-05 12:39:39 +100043#include <pwd.h>
Ben Lindstrome626cf82001-04-14 23:21:50 +000044
Darren Tucker06f2bd82004-05-13 16:06:46 +100045#include "sshpty.h"
Ben Lindstrome626cf82001-04-14 23:21:50 +000046
47static struct termios _saved_tio;
48static int _in_raw_mode = 0;
49
Darren Tuckerdd392642008-06-08 12:53:20 +100050struct termios *
Ben Lindstrome626cf82001-04-14 23:21:50 +000051get_saved_tio(void)
52{
Darren Tuckerdd392642008-06-08 12:53:20 +100053 return _in_raw_mode ? &_saved_tio : NULL;
Ben Lindstrome626cf82001-04-14 23:21:50 +000054}
55
56void
57leave_raw_mode(void)
58{
59 if (!_in_raw_mode)
60 return;
61 if (tcsetattr(fileno(stdin), TCSADRAIN, &_saved_tio) == -1)
62 perror("tcsetattr");
63 else
64 _in_raw_mode = 0;
Ben Lindstrome626cf82001-04-14 23:21:50 +000065}
66
67void
68enter_raw_mode(void)
69{
70 struct termios tio;
71
72 if (tcgetattr(fileno(stdin), &tio) == -1) {
73 perror("tcgetattr");
74 return;
75 }
76 _saved_tio = tio;
77 tio.c_iflag |= IGNPAR;
78 tio.c_iflag &= ~(ISTRIP | INLCR | IGNCR | ICRNL | IXON | IXANY | IXOFF);
Darren Tucker538d1802003-07-19 19:56:18 +100079#ifdef IUCLC
80 tio.c_iflag &= ~IUCLC;
81#endif
Ben Lindstrome626cf82001-04-14 23:21:50 +000082 tio.c_lflag &= ~(ISIG | ICANON | ECHO | ECHOE | ECHOK | ECHONL);
83#ifdef IEXTEN
84 tio.c_lflag &= ~IEXTEN;
85#endif
86 tio.c_oflag &= ~OPOST;
87 tio.c_cc[VMIN] = 1;
88 tio.c_cc[VTIME] = 0;
89 if (tcsetattr(fileno(stdin), TCSADRAIN, &tio) == -1)
90 perror("tcsetattr");
91 else
92 _in_raw_mode = 1;
Ben Lindstrome626cf82001-04-14 23:21:50 +000093}