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 #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 } 97