1 /* $OpenBSD: sshtty.c,v 1.1 2001/04/14 16:33:20 stevesk 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 "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