[openssh.git] / sshtty.c

/* $OpenBSD: sshtty.c,v 1.13 2008/05/19 15:45:07 djm Exp $ */
/*
 * Author: Tatu Ylonen <ylo@cs.hut.fi>
 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
 *                    All rights reserved
 *
 * As far as I am concerned, the code I have written for this software
 * can be used freely for any purpose.  Any derived versions of this
 * software must be clearly marked as such, and if the derived work is
 * incompatible with the protocol description in the RFC file, it must be
 * called by a name other than "ssh" or "Secure Shell".
 */
/*
 * Copyright (c) 2001 Markus Friedl.  All rights reserved.
 * Copyright (c) 2001 Kevin Steves.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "includes.h"

#include <sys/types.h>
#include <stdio.h>
#include <termios.h>
#include <pwd.h>

#include "sshpty.h"

static struct termios _saved_tio;
static int _in_raw_mode = 0;

struct termios *
get_saved_tio(void)
{
	return _in_raw_mode ? &_saved_tio : NULL;
}

void
leave_raw_mode(void)
{
	if (!_in_raw_mode)
		return;
	if (tcsetattr(fileno(stdin), TCSADRAIN, &_saved_tio) == -1)
		perror("tcsetattr");
	else
		_in_raw_mode = 0;
}

void
enter_raw_mode(void)
{
	struct termios tio;

	if (tcgetattr(fileno(stdin), &tio) == -1) {
		perror("tcgetattr");
		return;
	}
	_saved_tio = tio;
	tio.c_iflag |= IGNPAR;
	tio.c_iflag &= ~(ISTRIP | INLCR | IGNCR | ICRNL | IXON | IXANY | IXOFF);
#ifdef IUCLC
	tio.c_iflag &= ~IUCLC;
#endif
	tio.c_lflag &= ~(ISIG | ICANON | ECHO | ECHOE | ECHOK | ECHONL);
#ifdef IEXTEN
	tio.c_lflag &= ~IEXTEN;
#endif
	tio.c_oflag &= ~OPOST;
	tio.c_cc[VMIN] = 1;
	tio.c_cc[VTIME] = 0;
	if (tcsetattr(fileno(stdin), TCSADRAIN, &tio) == -1)
		perror("tcsetattr");
	else
		_in_raw_mode = 1;
}
Commit	Line	Data
82bb6f20	1	/* $OpenBSD: sshtty.c,v 1.13 2008/05/19 15:45:07 djm Exp $ */
7b628035	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"
1d3e026f	39
31652869	40	#include <sys/types.h>
cf851879	41	#include <stdio.h>
1d3e026f	42	#include <termios.h>
31652869	43	#include <pwd.h>
7b628035	44
07d80252	45	#include "sshpty.h"
7b628035	46
	47	static struct termios _saved_tio;
	48	static int _in_raw_mode = 0;
	49
82bb6f20	50	struct termios *
7b628035	51	get_saved_tio(void)
7b628035	52	{
82bb6f20	53	return _in_raw_mode ? &_saved_tio : NULL;
7b628035	54	}
	55
	56	void
	57	leave_raw_mode(void)
	58	{
	59	if (!_in_raw_mode)
	60	return;
	61	if (tcsetattr(fileno(stdin), TCSADRAIN, &_saved_tio) == -1)
	62	perror("tcsetattr");
	63	else
	64	_in_raw_mode = 0;
7b628035	65	}
	66
	67	void
	68	enter_raw_mode(void)
	69	{
	70	struct termios tio;
	71
	72	if (tcgetattr(fileno(stdin), &tio) == -1) {
	73	perror("tcgetattr");
	74	return;
	75	}
	76	_saved_tio = tio;
	77	tio.c_iflag \|= IGNPAR;
	78	tio.c_iflag &= ~(ISTRIP \| INLCR \| IGNCR \| ICRNL \| IXON \| IXANY \| IXOFF);
145d23ca	79	#ifdef IUCLC
	80	tio.c_iflag &= ~IUCLC;
	81	#endif
7b628035	82	tio.c_lflag &= ~(ISIG \| ICANON \| ECHO \| ECHOE \| ECHOK \| ECHONL);
	83	#ifdef IEXTEN
	84	tio.c_lflag &= ~IEXTEN;
	85	#endif
	86	tio.c_oflag &= ~OPOST;
	87	tio.c_cc[VMIN] = 1;
	88	tio.c_cc[VTIME] = 0;
	89	if (tcsetattr(fileno(stdin), TCSADRAIN, &tio) == -1)
	90	perror("tcsetattr");
	91	else
	92	_in_raw_mode = 1;
7b628035	93	}