1 /* $OpenBSD: sshtty.c,v 1.13 2008/05/19 15:45:07 djm 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 <sys/types.h> 39 #include <stdio.h> 40 #include <termios.h> 41 #include <pwd.h> 42 43 #include "sshpty.h" 44 45 static struct termios _saved_tio; 46 static int _in_raw_mode = 0; 47 48 struct termios * 49 get_saved_tio(void) 50 { 51 return _in_raw_mode ? &_saved_tio : NULL; 52 } 53 54 void 55 leave_raw_mode(void) 56 { 57 if (!_in_raw_mode) 58 return; 59 if (tcsetattr(fileno(stdin), TCSADRAIN, &_saved_tio) == -1) 60 perror("tcsetattr"); 61 else 62 _in_raw_mode = 0; 63 } 64 65 void 66 enter_raw_mode(void) 67 { 68 struct termios tio; 69 70 if (tcgetattr(fileno(stdin), &tio) == -1) { 71 perror("tcgetattr"); 72 return; 73 } 74 _saved_tio = tio; 75 tio.c_iflag |= IGNPAR; 76 tio.c_iflag &= ~(ISTRIP | INLCR | IGNCR | ICRNL | IXON | IXANY | IXOFF); 77 #ifdef IUCLC 78 tio.c_iflag &= ~IUCLC; 79 #endif 80 tio.c_lflag &= ~(ISIG | ICANON | ECHO | ECHOE | ECHOK | ECHONL); 81 #ifdef IEXTEN 82 tio.c_lflag &= ~IEXTEN; 83 #endif 84 tio.c_oflag &= ~OPOST; 85 tio.c_cc[VMIN] = 1; 86 tio.c_cc[VTIME] = 0; 87 if (tcsetattr(fileno(stdin), TCSADRAIN, &tio) == -1) 88 perror("tcsetattr"); 89 else 90 _in_raw_mode = 1; 91 } 92