1 /* @(#)wwtty.c 8.1 (Berkeley) 6/6/93 */
2 /* $NetBSD: wwtty.c,v 1.7 2003/08/07 11:17:46 agc Exp $ */
5 * Copyright (c) 1983, 1993
6 * The Regents of the University of California. All rights reserved.
8 * This code is derived from software contributed to Berkeley by
9 * Edward Wang at The University of California, Berkeley.
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 #include <sys/types.h>
37 #if !defined(OLD_TTY) && !defined(TIOCGWINSZ)
38 #include <sys/ioctl.h>
44 wwgettty(int d, struct ww_tty *t)
47 if (ioctl(d, TIOCGETP, (char *)&t->ww_sgttyb) < 0)
49 if (ioctl(d, TIOCGETC, (char *)&t->ww_tchars) < 0)
51 if (ioctl(d, TIOCGLTC, (char *)&t->ww_ltchars) < 0)
53 if (ioctl(d, TIOCLGET, (char *)&t->ww_lmode) < 0)
55 if (ioctl(d, TIOCGETD, (char *)&t->ww_ldisc) < 0)
58 if (tcgetattr(d, &t->ww_termios) < 0)
68 * Set the modes of tty 'd' to 't'
69 * 'o' is the current modes. We set the line discipline only if
70 * it changes, to avoid unnecessary flushing of typeahead.
73 wwsettty(int d, struct ww_tty *t)
78 /* XXX, for buggy tty drivers that don't wait for output to drain */
79 while (ioctl(d, TIOCOUTQ, &i) >= 0 && i > 0)
81 if (ioctl(d, TIOCSETN, (char *)&t->ww_sgttyb) < 0)
83 if (ioctl(d, TIOCSETC, (char *)&t->ww_tchars) < 0)
85 if (ioctl(d, TIOCSLTC, (char *)&t->ww_ltchars) < 0)
87 if (ioctl(d, TIOCLSET, (char *)&t->ww_lmode) < 0)
89 if (ioctl(d, TIOCGETD, (char *)&i) < 0)
91 if (t->ww_ldisc != i &&
92 ioctl(d, TIOCSETD, (char *)&t->ww_ldisc) < 0)
96 /* XXX, for buggy tty drivers that don't wait for output to drain */
99 if (tcsetattr(d, TCSADRAIN, &t->ww_termios) < 0)
109 * The ttysize and stop-start routines must also work
110 * on the control side of pseudoterminals.
114 wwgetttysize(int d, int *r, int *c)
116 struct winsize winsize;
118 if (ioctl(d, TIOCGWINSZ, (char *)&winsize) < 0) {
122 if (winsize.ws_row != 0)
124 if (winsize.ws_col != 0)
130 wwsetttysize(int d, int r, int c)
132 struct winsize winsize;
136 winsize.ws_xpixel = winsize.ws_ypixel = 0;
137 if (ioctl(d, TIOCSWINSZ, (char *)&winsize) < 0) {
147 #if !defined(OLD_TTY) && defined(TCOOFF)
148 /* not guaranteed to work on the pty side */
149 if (tcflow(d, TCOOFF) < 0)
151 if (ioctl(d, TIOCSTOP, (char *)0) < 0)
163 #if !defined(OLD_TTY) && defined(TCOON)
164 /* not guaranteed to work on the pty side */
165 if (tcflow(d, TCOON) < 0)
167 if (ioctl(d, TIOCSTART, (char *)0) < 0)