/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 1997 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/* Copyright (c) 1988 AT&T */
/* All Rights Reserved */
/*
* University Copyright- Copyright (c) 1982, 1986, 1988
* The Regents of the University of California
* All Rights Reserved
*
* University Acknowledgment- Portions of this document are derived from
* software developed by the University of California, Berkeley, and its
* contributors.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
/*LINTLIBRARY*/
/*
* Routines to deal with setting and resetting modes in the tty driver.
* See also setupterm.c in the termlib part.
*/
#include <sys/types.h>
#include "curses_inc.h"
int
cbreak(void)
{
/*
* This optimization is here because till SVR3.1 curses did not come up
* in cbreak mode and now it does. Therefore, most programs when they
* call cbreak won't pay for it since we'll know we're in the right
* mode.
*/
if (cur_term->_fl_rawmode != 1) {
#ifdef SYSV
/*
* You might ask why ICRNL has anything to do with cbreak.
* The problem is that there are function keys that send
* a carriage return (some hp's). Curses cannot virtualize
* these function keys if CR is being mapped to a NL. Sooo,
* when we start a program up we unmap those but if you are
* in nocbreak then we map them back. The reason for that is that
* if a getch or getstr is done and you are in nocbreak the tty
* driver won't return until it sees a new line and since we've
* turned it off any program that has nl() and nocbreak() would
* force the user to type a NL. The problem with the function keys
* only gets solved if you are in cbreak mode which is OK
* since program taking action on a function key is probably
* in cbreak because who would expect someone to press a function
* key and then return ?????
*/
PROGTTYS.c_iflag &= ~ICRNL;
PROGTTYS.c_lflag &= ~ICANON;
PROGTTYS.c_cc[VMIN] = 1;
PROGTTYS.c_cc[VTIME] = 0;
#else
PROGTTY.sg_flags |= (CBREAK | CRMOD);
#endif
#ifdef DEBUG
#ifdef SYSV
if (outf)
fprintf(outf, "cbreak(), file %x, flags %x\n",
cur_term->Filedes, PROGTTYS.c_lflag);
#else
if (outf)
fprintf(outf, "cbreak(), file %x, flags %x\n",
cur_term->Filedes, PROGTTY.sg_flags);
#endif
#endif
cur_term->_fl_rawmode = 1;
cur_term->_delay = -1;
(void) reset_prog_mode();
#ifdef FIONREAD
cur_term->timeout = 0;
#endif /* FIONREAD */
}
return (OK);
}