1/* $NetBSD: sshtty.c,v 1.7 2017/04/18 18:41:46 christos Exp $ */ 2/* $OpenBSD: sshtty.c,v 1.14 2010/01/09 05:04:24 djm Exp $ */ 3/* 4 * Author: Tatu Ylonen <ylo@cs.hut.fi> 5 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland 6 * All rights reserved 7 * 8 * As far as I am concerned, the code I have written for this software 9 * can be used freely for any purpose. Any derived versions of this 10 * software must be clearly marked as such, and if the derived work is 11 * incompatible with the protocol description in the RFC file, it must be 12 * called by a name other than "ssh" or "Secure Shell". 13 */ 14/* 15 * Copyright (c) 2001 Markus Friedl. All rights reserved. 16 * Copyright (c) 2001 Kevin Steves. All rights reserved. 17 * 18 * Redistribution and use in source and binary forms, with or without 19 * modification, are permitted provided that the following conditions 20 * are met: 21 * 1. Redistributions of source code must retain the above copyright 22 * notice, this list of conditions and the following disclaimer. 23 * 2. Redistributions in binary form must reproduce the above copyright 24 * notice, this list of conditions and the following disclaimer in the 25 * documentation and/or other materials provided with the distribution. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 28 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 29 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 30 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 31 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 32 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 33 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 34 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 35 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 36 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39#include "includes.h" 40__RCSID("$NetBSD: sshtty.c,v 1.7 2017/04/18 18:41:46 christos Exp $"); 41#include <sys/types.h> 42#include <stdio.h> 43#include <termios.h> 44#include <pwd.h> 45 46#include "sshpty.h" 47 48static struct termios _saved_tio; 49static int _in_raw_mode = 0; 50 51struct termios * 52get_saved_tio(void) 53{ 54 return _in_raw_mode ? &_saved_tio : NULL; 55} 56 57void 58leave_raw_mode(int quiet) 59{ 60 if (!_in_raw_mode) 61 return; 62 if (tcsetattr(fileno(stdin), TCSADRAIN, &_saved_tio) == -1) { 63 if (!quiet) 64 perror("tcsetattr"); 65 } else 66 _in_raw_mode = 0; 67} 68 69void 70enter_raw_mode(int quiet) 71{ 72 struct termios tio; 73 74 if (tcgetattr(fileno(stdin), &tio) == -1) { 75 if (!quiet) 76 perror("tcgetattr"); 77 return; 78 } 79 _saved_tio = tio; 80 tio.c_iflag |= IGNPAR; 81 tio.c_iflag &= ~(ISTRIP | INLCR | IGNCR | ICRNL | IXON | IXANY | IXOFF); 82#ifdef IUCLC 83 tio.c_iflag &= ~IUCLC; 84#endif 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 if (!quiet) 94 perror("tcsetattr"); 95 } else 96 _in_raw_mode = 1; 97} 98