1 /* $OpenBSD: wwtty.c,v 1.7 2003/08/01 22:01:38 david Exp $ */
2 /* $NetBSD: wwtty.c,v 1.4 1995/12/21 11:06:50 mycroft Exp $ */
3
4 /*
5 * Copyright (c) 1983, 1993
6 * The Regents of the University of California. All rights reserved.
7 *
8 * This code is derived from software contributed to Berkeley by
9 * Edward Wang at The University of California, Berkeley.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
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.
22 *
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
33 * SUCH DAMAGE.
34 */
35
36 #ifndef lint
37 #if 0
38 static char sccsid[] = "@(#)wwtty.c 8.1 (Berkeley) 6/6/93";
39 #else
40 static char rcsid[] = "$OpenBSD: wwtty.c,v 1.7 2003/08/01 22:01:38 david Exp $";
41 #endif
42 #endif /* not lint */
43
44 #include "ww.h"
45 #include <sys/types.h>
46 #include <fcntl.h>
47 #if !defined(OLD_TTY)
48 #include <sys/ioctl.h>
49 #endif
50
51 wwgettty(d, t)
52 struct ww_tty *t;
53 {
54 #ifdef OLD_TTY
55 if (ioctl(d, TIOCGETP, (char *)&t->ww_sgttyb) < 0)
56 goto bad;
57 if (ioctl(d, TIOCGETC, (char *)&t->ww_tchars) < 0)
58 goto bad;
59 if (ioctl(d, TIOCGLTC, (char *)&t->ww_ltchars) < 0)
60 goto bad;
61 if (ioctl(d, TIOCLGET, (char *)&t->ww_lmode) < 0)
62 goto bad;
63 if (ioctl(d, TIOCGETD, (char *)&t->ww_ldisc) < 0)
64 goto bad;
65 #else
66 if (tcgetattr(d, &t->ww_termios) < 0)
67 goto bad;
68 #endif
69 return 0;
70 bad:
71 wwerrno = WWE_SYS;
72 return -1;
73 }
74
75 /*
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.
79 */
80 wwsettty(d, t)
81 struct ww_tty *t;
82 {
83 #ifdef OLD_TTY
84 int i;
85
86 /* XXX, for buggy tty drivers that don't wait for output to drain */
87 while (ioctl(d, TIOCOUTQ, &i) >= 0 && i > 0)
88 usleep(100000);
89 if (ioctl(d, TIOCSETN, (char *)&t->ww_sgttyb) < 0)
90 goto bad;
91 if (ioctl(d, TIOCSETC, (char *)&t->ww_tchars) < 0)
92 goto bad;
93 if (ioctl(d, TIOCSLTC, (char *)&t->ww_ltchars) < 0)
94 goto bad;
95 if (ioctl(d, TIOCLSET, (char *)&t->ww_lmode) < 0)
96 goto bad;
97 if (ioctl(d, TIOCGETD, (char *)&i) < 0)
98 goto bad;
99 if (t->ww_ldisc != i &&
100 ioctl(d, TIOCSETD, (char *)&t->ww_ldisc) < 0)
101 goto bad;
102 #else
103 #ifdef sun
104 /* XXX, for buggy tty drivers that don't wait for output to drain */
105 (void) tcdrain(d);
106 #endif
107 if (tcsetattr(d, TCSADRAIN, &t->ww_termios) < 0)
108 goto bad;
109 #endif
110 return 0;
111 bad:
112 wwerrno = WWE_SYS;
113 return -1;
114 }
115
116 /*
117 * The ttysize and stop-start routines must also work
118 * on the control side of pseudoterminals.
119 */
120
wwgetttysize(d,r,c)121 wwgetttysize(d, r, c)
122 int *r, *c;
123 {
124 struct winsize winsize;
125
126 if (ioctl(d, TIOCGWINSZ, (char *)&winsize) < 0) {
127 wwerrno = WWE_SYS;
128 return -1;
129 }
130 if (winsize.ws_row != 0)
131 *r = winsize.ws_row;
132 if (winsize.ws_col != 0)
133 *c = winsize.ws_col;
134 return 0;
135 }
136
wwsetttysize(d,r,c)137 wwsetttysize(d, r, c)
138 {
139 struct winsize winsize;
140
141 winsize.ws_row = r;
142 winsize.ws_col = c;
143 winsize.ws_xpixel = winsize.ws_ypixel = 0;
144 if (ioctl(d, TIOCSWINSZ, (char *)&winsize) < 0) {
145 wwerrno = WWE_SYS;
146 return -1;
147 }
148 return 0;
149 }
150
wwstoptty(d)151 wwstoptty(d)
152 {
153 #if !defined(OLD_TTY) && defined(TCOOFF)
154 /* not guaranteed to work on the pty side */
155 if (tcflow(d, TCOOFF) < 0)
156 #else
157 if (ioctl(d, TIOCSTOP, (char *)0) < 0)
158 #endif
159 {
160 wwerrno = WWE_SYS;
161 return -1;
162 }
163 return 0;
164 }
165
wwstarttty(d)166 wwstarttty(d)
167 {
168 #if !defined(OLD_TTY) && defined(TCOON)
169 /* not guaranteed to work on the pty side */
170 if (tcflow(d, TCOON) < 0)
171 #else
172 if (ioctl(d, TIOCSTART, (char *)0) < 0)
173 #endif
174 {
175 wwerrno = WWE_SYS;
176 return -1;
177 }
178 return 0;
179 }
180