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mirror of https://git.FreeBSD.org/src.git synced 2024-12-24 11:29:10 +00:00
freebsd/usr.bin/window/wwtty.c
1994-05-27 12:33:43 +00:00

181 lines
4.8 KiB
C

/*
* Copyright (c) 1983, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Edward Wang at The University of California, Berkeley.
*
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR 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.
*/
#ifndef lint
static char sccsid[] = "@(#)wwtty.c 8.1 (Berkeley) 6/6/93";
#endif /* not lint */
#include "ww.h"
#include <sys/types.h>
#include <fcntl.h>
#if !defined(OLD_TTY) && !defined(TIOCGWINSZ)
#include <sys/ioctl.h>
#endif
wwgettty(d, t)
register struct ww_tty *t;
{
#ifdef OLD_TTY
if (ioctl(d, TIOCGETP, (char *)&t->ww_sgttyb) < 0)
goto bad;
if (ioctl(d, TIOCGETC, (char *)&t->ww_tchars) < 0)
goto bad;
if (ioctl(d, TIOCGLTC, (char *)&t->ww_ltchars) < 0)
goto bad;
if (ioctl(d, TIOCLGET, (char *)&t->ww_lmode) < 0)
goto bad;
if (ioctl(d, TIOCGETD, (char *)&t->ww_ldisc) < 0)
goto bad;
#else
if (tcgetattr(d, &t->ww_termios) < 0)
goto bad;
#endif
if ((t->ww_fflags = fcntl(d, F_GETFL, 0)) < 0)
goto bad;
return 0;
bad:
wwerrno = WWE_SYS;
return -1;
}
/*
* Set the modes of tty 'd' to 't'
* 'o' is the current modes. We set the line discipline only if
* it changes, to avoid unnecessary flushing of typeahead.
*/
wwsettty(d, t)
register struct ww_tty *t;
{
#ifdef OLD_TTY
int i;
/* XXX, for buggy tty drivers that don't wait for output to drain */
while (ioctl(d, TIOCOUTQ, &i) >= 0 && i > 0)
usleep(100000);
if (ioctl(d, TIOCSETN, (char *)&t->ww_sgttyb) < 0)
goto bad;
if (ioctl(d, TIOCSETC, (char *)&t->ww_tchars) < 0)
goto bad;
if (ioctl(d, TIOCSLTC, (char *)&t->ww_ltchars) < 0)
goto bad;
if (ioctl(d, TIOCLSET, (char *)&t->ww_lmode) < 0)
goto bad;
if (ioctl(d, TIOCGETD, (char *)&i) < 0)
goto bad;
if (t->ww_ldisc != i &&
ioctl(d, TIOCSETD, (char *)&t->ww_ldisc) < 0)
goto bad;
#else
#ifdef sun
/* XXX, for buggy tty drivers that don't wait for output to drain */
(void) tcdrain(d);
#endif
if (tcsetattr(d, TCSADRAIN, &t->ww_termios) < 0)
goto bad;
#endif
if (fcntl(d, F_SETFL, t->ww_fflags) < 0)
goto bad;
return 0;
bad:
wwerrno = WWE_SYS;
return -1;
}
/*
* The ttysize and stop-start routines must also work
* on the control side of pseudoterminals.
*/
wwgetttysize(d, r, c)
int *r, *c;
{
struct winsize winsize;
if (ioctl(d, TIOCGWINSZ, (char *)&winsize) < 0) {
wwerrno = WWE_SYS;
return -1;
}
if (winsize.ws_row != 0)
*r = winsize.ws_row;
if (winsize.ws_col != 0)
*c = winsize.ws_col;
return 0;
}
wwsetttysize(d, r, c)
{
struct winsize winsize;
winsize.ws_row = r;
winsize.ws_col = c;
winsize.ws_xpixel = winsize.ws_ypixel = 0;
if (ioctl(d, TIOCSWINSZ, (char *)&winsize) < 0) {
wwerrno = WWE_SYS;
return -1;
}
return 0;
}
wwstoptty(d)
{
#if !defined(OLD_TTY) && defined(TCOOFF)
/* not guaranteed to work on the pty side */
if (tcflow(d, TCOOFF) < 0)
#else
if (ioctl(d, TIOCSTOP, (char *)0) < 0)
#endif
{
wwerrno = WWE_SYS;
return -1;
}
return 0;
}
wwstarttty(d)
{
#if !defined(OLD_TTY) && defined(TCOON)
/* not guaranteed to work on the pty side */
if (tcflow(d, TCOON) < 0)
#else
if (ioctl(d, TIOCSTART, (char *)0) < 0)
#endif
{
wwerrno = WWE_SYS;
return -1;
}
return 0;
}