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 #pragma ident "%Z%%M% %I% %E% SMI" 41 42 #include "sshtty.h" 43 #include "log.h" 44 45 static struct termios _saved_tio; 46 static int _in_raw_mode = 0; 47 48 int 49 in_raw_mode(void) 50 { 51 return _in_raw_mode; 52 } 53 54 struct termios 55 get_saved_tio(void) 56 { 57 return _saved_tio; 58 } 59 60 void 61 leave_raw_mode(void) 62 { 63 if (!_in_raw_mode) 64 return; 65 if (tcsetattr(fileno(stdin), TCSADRAIN, &_saved_tio) == -1) 66 perror("tcsetattr"); 67 else 68 _in_raw_mode = 0; 69 70 fatal_remove_cleanup((void (*) (void *)) leave_raw_mode, NULL); 71 } 72 73 void 74 enter_raw_mode(void) 75 { 76 struct termios tio; 77 78 if (tcgetattr(fileno(stdin), &tio) == -1) { 79 perror("tcgetattr"); 80 return; 81 } 82 _saved_tio = tio; 83 tio.c_iflag |= IGNPAR; 84 tio.c_iflag &= ~(ISTRIP | INLCR | IGNCR | ICRNL | IXON | IXANY | IXOFF); 85 tio.c_lflag &= ~(ISIG | ICANON | ECHO | ECHOE | ECHOK | ECHONL); 86 #ifdef IEXTEN 87 tio.c_lflag &= ~IEXTEN; 88 #endif 89 tio.c_oflag &= ~OPOST; 90 tio.c_cc[VMIN] = 1; 91 tio.c_cc[VTIME] = 0; 92 if (tcsetattr(fileno(stdin), TCSADRAIN, &tio) == -1) 93 perror("tcsetattr"); 94 else 95 _in_raw_mode = 1; 96 97 fatal_add_cleanup((void (*) (void *)) leave_raw_mode, NULL); 98 }