1 /*
2 * Copyright (c) 1983, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Edward Wang at The University of California, Berkeley.
7 *
8 * %sccs.include.redist.c%
9 */
10
11 #ifndef lint
12 static char sccsid[] = "@(#)wwtty.c 8.1 (Berkeley) 06/06/93";
13 #endif /* not lint */
14
15 #include "ww.h"
16 #include <sys/types.h>
17 #include <fcntl.h>
18 #if !defined(OLD_TTY) && !defined(TIOCGWINSZ)
19 #include <sys/ioctl.h>
20 #endif
21
wwgettty(d,t)22 wwgettty(d, t)
23 register struct ww_tty *t;
24 {
25 #ifdef OLD_TTY
26 if (ioctl(d, TIOCGETP, (char *)&t->ww_sgttyb) < 0)
27 goto bad;
28 if (ioctl(d, TIOCGETC, (char *)&t->ww_tchars) < 0)
29 goto bad;
30 if (ioctl(d, TIOCGLTC, (char *)&t->ww_ltchars) < 0)
31 goto bad;
32 if (ioctl(d, TIOCLGET, (char *)&t->ww_lmode) < 0)
33 goto bad;
34 if (ioctl(d, TIOCGETD, (char *)&t->ww_ldisc) < 0)
35 goto bad;
36 #else
37 if (tcgetattr(d, &t->ww_termios) < 0)
38 goto bad;
39 #endif
40 if ((t->ww_fflags = fcntl(d, F_GETFL, 0)) < 0)
41 goto bad;
42 return 0;
43 bad:
44 wwerrno = WWE_SYS;
45 return -1;
46 }
47
48 /*
49 * Set the modes of tty 'd' to 't'
50 * 'o' is the current modes. We set the line discipline only if
51 * it changes, to avoid unnecessary flushing of typeahead.
52 */
wwsettty(d,t)53 wwsettty(d, t)
54 register struct ww_tty *t;
55 {
56 #ifdef OLD_TTY
57 int i;
58
59 /* XXX, for buggy tty drivers that don't wait for output to drain */
60 while (ioctl(d, TIOCOUTQ, &i) >= 0 && i > 0)
61 usleep(100000);
62 if (ioctl(d, TIOCSETN, (char *)&t->ww_sgttyb) < 0)
63 goto bad;
64 if (ioctl(d, TIOCSETC, (char *)&t->ww_tchars) < 0)
65 goto bad;
66 if (ioctl(d, TIOCSLTC, (char *)&t->ww_ltchars) < 0)
67 goto bad;
68 if (ioctl(d, TIOCLSET, (char *)&t->ww_lmode) < 0)
69 goto bad;
70 if (ioctl(d, TIOCGETD, (char *)&i) < 0)
71 goto bad;
72 if (t->ww_ldisc != i &&
73 ioctl(d, TIOCSETD, (char *)&t->ww_ldisc) < 0)
74 goto bad;
75 #else
76 #ifdef sun
77 /* XXX, for buggy tty drivers that don't wait for output to drain */
78 (void) tcdrain(d);
79 #endif
80 if (tcsetattr(d, TCSADRAIN, &t->ww_termios) < 0)
81 goto bad;
82 #endif
83 if (fcntl(d, F_SETFL, t->ww_fflags) < 0)
84 goto bad;
85 return 0;
86 bad:
87 wwerrno = WWE_SYS;
88 return -1;
89 }
90
91 /*
92 * The ttysize and stop-start routines must also work
93 * on the control side of pseudoterminals.
94 */
95
wwgetttysize(d,r,c)96 wwgetttysize(d, r, c)
97 int *r, *c;
98 {
99 struct winsize winsize;
100
101 if (ioctl(d, TIOCGWINSZ, (char *)&winsize) < 0) {
102 wwerrno = WWE_SYS;
103 return -1;
104 }
105 if (winsize.ws_row != 0)
106 *r = winsize.ws_row;
107 if (winsize.ws_col != 0)
108 *c = winsize.ws_col;
109 return 0;
110 }
111
wwsetttysize(d,r,c)112 wwsetttysize(d, r, c)
113 {
114 struct winsize winsize;
115
116 winsize.ws_row = r;
117 winsize.ws_col = c;
118 winsize.ws_xpixel = winsize.ws_ypixel = 0;
119 if (ioctl(d, TIOCSWINSZ, (char *)&winsize) < 0) {
120 wwerrno = WWE_SYS;
121 return -1;
122 }
123 return 0;
124 }
125
wwstoptty(d)126 wwstoptty(d)
127 {
128 #if !defined(OLD_TTY) && defined(TCOOFF)
129 /* not guaranteed to work on the pty side */
130 if (tcflow(d, TCOOFF) < 0)
131 #else
132 if (ioctl(d, TIOCSTOP, (char *)0) < 0)
133 #endif
134 {
135 wwerrno = WWE_SYS;
136 return -1;
137 }
138 return 0;
139 }
140
wwstarttty(d)141 wwstarttty(d)
142 {
143 #if !defined(OLD_TTY) && defined(TCOON)
144 /* not guaranteed to work on the pty side */
145 if (tcflow(d, TCOON) < 0)
146 #else
147 if (ioctl(d, TIOCSTART, (char *)0) < 0)
148 #endif
149 {
150 wwerrno = WWE_SYS;
151 return -1;
152 }
153 return 0;
154 }
155