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Annotation of src/usr.bin/ssh/sshtty.c, Revision 1.8

1.1       stevesk     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"
1.8     ! stevesk    38: RCSID("$OpenBSD: sshtty.c,v 1.7 2006/02/07 01:42:00 stevesk Exp $");
1.7       stevesk    39:
                     40: #include <termios.h>
1.1       stevesk    41:
1.6       deraadt    42: #include "sshpty.h"
1.1       stevesk    43:
                     44: static struct termios _saved_tio;
                     45: static int _in_raw_mode = 0;
                     46:
                     47: struct termios
                     48: get_saved_tio(void)
                     49: {
                     50:        return _saved_tio;
                     51: }
                     52:
                     53: void
                     54: leave_raw_mode(void)
                     55: {
                     56:        if (!_in_raw_mode)
                     57:                return;
                     58:        if (tcsetattr(fileno(stdin), TCSADRAIN, &_saved_tio) == -1)
                     59:                perror("tcsetattr");
                     60:        else
                     61:                _in_raw_mode = 0;
                     62: }
                     63:
                     64: void
                     65: enter_raw_mode(void)
                     66: {
                     67:        struct termios tio;
                     68:
                     69:        if (tcgetattr(fileno(stdin), &tio) == -1) {
                     70:                perror("tcgetattr");
                     71:                return;
                     72:        }
                     73:        _saved_tio = tio;
                     74:        tio.c_iflag |= IGNPAR;
                     75:        tio.c_iflag &= ~(ISTRIP | INLCR | IGNCR | ICRNL | IXON | IXANY | IXOFF);
1.4       markus     76: #ifdef IUCLC
                     77:        tio.c_iflag &= ~IUCLC;
                     78: #endif
1.1       stevesk    79:        tio.c_lflag &= ~(ISIG | ICANON | ECHO | ECHOE | ECHOK | ECHONL);
                     80: #ifdef IEXTEN
                     81:        tio.c_lflag &= ~IEXTEN;
                     82: #endif
                     83:        tio.c_oflag &= ~OPOST;
                     84:        tio.c_cc[VMIN] = 1;
                     85:        tio.c_cc[VTIME] = 0;
                     86:        if (tcsetattr(fileno(stdin), TCSADRAIN, &tio) == -1)
                     87:                perror("tcsetattr");
                     88:        else
                     89:                _in_raw_mode = 1;
                     90: }