#ifndef lint
static const char RCSid[] = "$Id: tty.c,v 2.2 2003/02/22 02:07:29 greg Exp $";
#endif
/*
* tty.c - i/o for terminal drivers.
*/
/* ====================================================================
* The Radiance Software License, Version 1.0
*
* Copyright (c) 1990 - 2002 The Regents of the University of California,
* through Lawrence Berkeley National Laboratory. 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.
*
* 3. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes Radiance software
* (http://radsite.lbl.gov/)
* developed by the Lawrence Berkeley National Laboratory
* (http://www.lbl.gov/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Radiance," "Lawrence Berkeley National Laboratory"
* and "The Regents of the University of California" must
* not be used to endorse or promote products derived from this
* software without prior written permission. For written
* permission, please contact radiance@radsite.lbl.gov.
*
* 5. Products derived from this software may not be called "Radiance",
* nor may "Radiance" appear in their name, without prior written
* permission of Lawrence Berkeley National Laboratory.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED 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 Lawrence Berkeley National Laboratory OR
* ITS CONTRIBUTORS 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.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of Lawrence Berkeley National Laboratory. For more
* information on Lawrence Berkeley National Laboratory, please see
* .
*/
#include
#include
#include
#include
#include "driver.h"
/*
* Drivers using these routines must call getch()
* for input from stdin.
*/
struct sgttyb ttymode; /* original tty modes */
int ttyfd; /* tty file descriptor */
struct driver *ttydev; /* tty device */
ttyset(dev, fd) /* set up raw tty device */
struct driver *dev;
int fd;
{
int ttyin(), newinp();
struct sgttyb flags;
if (!isatty(fd))
return(-1);
ttyfd = fd;
ioctl(ttyfd, TIOCGETP, &ttymode);
ioctl(ttyfd, TIOCGETP, &flags);
flags.sg_flags |= RAW; /* also turns output */
flags.sg_flags &= ~ECHO; /* processing off */
ioctl(ttyfd, TIOCSETP, &flags);
/* install input handler */
ttydev = dev;
ttydev->comin = ttyin;
ttydev->inpready = 0;
signal(SIGIO, newinp);
fcntl(ttyfd, F_SETFL, FASYNC);
return(0);
}
ttydone() /* restore tty modes */
{
fcntl(ttyfd, F_SETFL, 0);
signal(SIGIO, SIG_DFL);
ioctl(ttyfd, TIOCSETP, &ttymode);
ttydev->comin = NULL;
ttydev->inpready = 0;
ttydev = NULL;
}
int
getch() /* get a character in raw mode */
{
register int c;
fcntl(ttyfd, F_SETFL, 0); /* allow read to block */
if (ttydev->inpready > 0)
ttydev->inpready--;
c = getchar();
fcntl(ttyfd, F_SETFL, FASYNC);
return(c);
}
static
ttyin(buf, prompt) /* read a line in raw mode */
char *buf, *prompt;
{
int getch();
if (prompt != NULL)
(*ttydev->comout)(prompt);
editline(buf, getch, ttydev->comout);
}
static
newinp() /* new input */
{
ttydev->inpready++;
}