183 lines
4.6 KiB
C
183 lines
4.6 KiB
C
/* $NetBSD: wwtty.c,v 1.7 2003/08/07 11:17:46 agc Exp $ */
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/*
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* Copyright (c) 1983, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Edward Wang at The University of California, Berkeley.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)wwtty.c 8.1 (Berkeley) 6/6/93";
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#else
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__RCSID("$NetBSD: wwtty.c,v 1.7 2003/08/07 11:17:46 agc Exp $");
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#endif
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#endif /* not lint */
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#include <sys/types.h>
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#if !defined(OLD_TTY) && !defined(TIOCGWINSZ)
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#include <sys/ioctl.h>
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#endif
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#include <fcntl.h>
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#include "ww.h"
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int
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wwgettty(int d, struct ww_tty *t)
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{
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#ifdef OLD_TTY
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if (ioctl(d, TIOCGETP, (char *)&t->ww_sgttyb) < 0)
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goto bad;
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if (ioctl(d, TIOCGETC, (char *)&t->ww_tchars) < 0)
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goto bad;
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if (ioctl(d, TIOCGLTC, (char *)&t->ww_ltchars) < 0)
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goto bad;
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if (ioctl(d, TIOCLGET, (char *)&t->ww_lmode) < 0)
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goto bad;
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if (ioctl(d, TIOCGETD, (char *)&t->ww_ldisc) < 0)
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goto bad;
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#else
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if (tcgetattr(d, &t->ww_termios) < 0)
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goto bad;
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#endif
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return 0;
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bad:
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wwerrno = WWE_SYS;
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return -1;
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}
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/*
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* Set the modes of tty 'd' to 't'
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* 'o' is the current modes. We set the line discipline only if
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* it changes, to avoid unnecessary flushing of typeahead.
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*/
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int
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wwsettty(int d, struct ww_tty *t)
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{
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#ifdef OLD_TTY
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int i;
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/* XXX, for buggy tty drivers that don't wait for output to drain */
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while (ioctl(d, TIOCOUTQ, &i) >= 0 && i > 0)
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usleep(100000);
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if (ioctl(d, TIOCSETN, (char *)&t->ww_sgttyb) < 0)
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goto bad;
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if (ioctl(d, TIOCSETC, (char *)&t->ww_tchars) < 0)
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goto bad;
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if (ioctl(d, TIOCSLTC, (char *)&t->ww_ltchars) < 0)
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goto bad;
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if (ioctl(d, TIOCLSET, (char *)&t->ww_lmode) < 0)
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goto bad;
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if (ioctl(d, TIOCGETD, (char *)&i) < 0)
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goto bad;
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if (t->ww_ldisc != i &&
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ioctl(d, TIOCSETD, (char *)&t->ww_ldisc) < 0)
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goto bad;
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#else
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#ifdef sun
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/* XXX, for buggy tty drivers that don't wait for output to drain */
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(void) tcdrain(d);
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#endif
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if (tcsetattr(d, TCSADRAIN, &t->ww_termios) < 0)
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goto bad;
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#endif
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return 0;
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bad:
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wwerrno = WWE_SYS;
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return -1;
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}
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/*
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* The ttysize and stop-start routines must also work
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* on the control side of pseudoterminals.
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*/
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int
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wwgetttysize(int d, int *r, int *c)
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{
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struct winsize winsize;
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if (ioctl(d, TIOCGWINSZ, (char *)&winsize) < 0) {
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wwerrno = WWE_SYS;
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return -1;
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}
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if (winsize.ws_row != 0)
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*r = winsize.ws_row;
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if (winsize.ws_col != 0)
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*c = winsize.ws_col;
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return 0;
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}
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int
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wwsetttysize(int d, int r, int c)
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{
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struct winsize winsize;
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winsize.ws_row = r;
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winsize.ws_col = c;
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winsize.ws_xpixel = winsize.ws_ypixel = 0;
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if (ioctl(d, TIOCSWINSZ, (char *)&winsize) < 0) {
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wwerrno = WWE_SYS;
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return -1;
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}
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return 0;
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}
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int
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wwstoptty(int d)
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{
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#if !defined(OLD_TTY) && defined(TCOOFF)
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/* not guaranteed to work on the pty side */
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if (tcflow(d, TCOOFF) < 0)
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#else
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if (ioctl(d, TIOCSTOP, (char *)0) < 0)
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#endif
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{
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wwerrno = WWE_SYS;
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return -1;
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}
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return 0;
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}
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int
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wwstarttty(int d)
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{
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#if !defined(OLD_TTY) && defined(TCOON)
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/* not guaranteed to work on the pty side */
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if (tcflow(d, TCOON) < 0)
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#else
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if (ioctl(d, TIOCSTART, (char *)0) < 0)
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#endif
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{
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wwerrno = WWE_SYS;
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return -1;
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}
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return 0;
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}
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