1 /* $NetBSD: wwtty.c,v 1.7 2003/08/07 11:17:46 agc Exp $ */
4 * Copyright (c) 1983, 1993
5 * The Regents of the University of California. All rights reserved.
7 * This code is derived from software contributed to Berkeley by
8 * Edward Wang at The University of California, Berkeley.
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 #include <sys/cdefs.h>
38 static char sccsid[] = "@(#)wwtty.c 8.1 (Berkeley) 6/6/93";
40 __RCSID("$NetBSD: wwtty.c,v 1.7 2003/08/07 11:17:46 agc Exp $");
44 #include <sys/types.h>
45 #if !defined(OLD_TTY) && !defined(TIOCGWINSZ)
46 #include <sys/ioctl.h>
52 wwgettty(int d, struct ww_tty *t)
55 if (ioctl(d, TIOCGETP, (char *)&t->ww_sgttyb) < 0)
57 if (ioctl(d, TIOCGETC, (char *)&t->ww_tchars) < 0)
59 if (ioctl(d, TIOCGLTC, (char *)&t->ww_ltchars) < 0)
61 if (ioctl(d, TIOCLGET, (char *)&t->ww_lmode) < 0)
63 if (ioctl(d, TIOCGETD, (char *)&t->ww_ldisc) < 0)
66 if (tcgetattr(d, &t->ww_termios) < 0)
76 * Set the modes of tty 'd' to 't'
77 * 'o' is the current modes. We set the line discipline only if
78 * it changes, to avoid unnecessary flushing of typeahead.
81 wwsettty(int d, struct ww_tty *t)
86 /* XXX, for buggy tty drivers that don't wait for output to drain */
87 while (ioctl(d, TIOCOUTQ, &i) >= 0 && i > 0)
89 if (ioctl(d, TIOCSETN, (char *)&t->ww_sgttyb) < 0)
91 if (ioctl(d, TIOCSETC, (char *)&t->ww_tchars) < 0)
93 if (ioctl(d, TIOCSLTC, (char *)&t->ww_ltchars) < 0)
95 if (ioctl(d, TIOCLSET, (char *)&t->ww_lmode) < 0)
97 if (ioctl(d, TIOCGETD, (char *)&i) < 0)
99 if (t->ww_ldisc != i &&
100 ioctl(d, TIOCSETD, (char *)&t->ww_ldisc) < 0)
104 /* XXX, for buggy tty drivers that don't wait for output to drain */
107 if (tcsetattr(d, TCSADRAIN, &t->ww_termios) < 0)
117 * The ttysize and stop-start routines must also work
118 * on the control side of pseudoterminals.
122 wwgetttysize(int d, int *r, int *c)
124 struct winsize winsize;
126 if (ioctl(d, TIOCGWINSZ, (char *)&winsize) < 0) {
130 if (winsize.ws_row != 0)
132 if (winsize.ws_col != 0)
138 wwsetttysize(int d, int r, int c)
140 struct winsize winsize;
144 winsize.ws_xpixel = winsize.ws_ypixel = 0;
145 if (ioctl(d, TIOCSWINSZ, (char *)&winsize) < 0) {
155 #if !defined(OLD_TTY) && defined(TCOOFF)
156 /* not guaranteed to work on the pty side */
157 if (tcflow(d, TCOOFF) < 0)
159 if (ioctl(d, TIOCSTOP, (char *)0) < 0)
171 #if !defined(OLD_TTY) && defined(TCOON)
172 /* not guaranteed to work on the pty side */
173 if (tcflow(d, TCOON) < 0)
175 if (ioctl(d, TIOCSTART, (char *)0) < 0)