1 /* $OpenBSD: sshtty.c,v 1.14 2010/01/09 05:04:24 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 "includes.h" 39 40 #include <sys/types.h> 41 #include <stdio.h> 42 #include <termios.h> 43 #include <pwd.h> 44 45 #include "sshpty.h" 46 47 static struct termios _saved_tio; 48 static int _in_raw_mode = 0; 49 50 struct termios * 51 get_saved_tio(void) 52 { 53 return _in_raw_mode ? &_saved_tio : NULL; 54 } 55 56 void 57 leave_raw_mode(int quiet) 58 { 59 if (!_in_raw_mode) 60 return; 61 if (tcsetattr(fileno(stdin), TCSADRAIN, &_saved_tio) == -1) { 62 if (!quiet) 63 perror("tcsetattr"); 64 } else 65 _in_raw_mode = 0; 66 } 67 68 void 69 enter_raw_mode(int quiet) 70 { 71 struct termios tio; 72 73 if (tcgetattr(fileno(stdin), &tio) == -1) { 74 if (!quiet) 75 perror("tcgetattr"); 76 return; 77 } 78 _saved_tio = tio; 79 tio.c_iflag |= IGNPAR; 80 tio.c_iflag &= ~(ISTRIP | INLCR | IGNCR | ICRNL | IXON | IXANY | IXOFF); 81 #ifdef IUCLC 82 tio.c_iflag &= ~IUCLC; 83 #endif 84 tio.c_lflag &= ~(ISIG | ICANON | ECHO | ECHOE | ECHOK | ECHONL); 85 #ifdef IEXTEN 86 tio.c_lflag &= ~IEXTEN; 87 #endif 88 tio.c_oflag &= ~OPOST; 89 tio.c_cc[VMIN] = 1; 90 tio.c_cc[VTIME] = 0; 91 if (tcsetattr(fileno(stdin), TCSADRAIN, &tio) == -1) { 92 if (!quiet) 93 perror("tcsetattr"); 94 } else 95 _in_raw_mode = 1; 96 } 97