1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License"). You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22 /*
23 * Copyright 1997 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 /* Copyright (c) 1988 AT&T */
28 /* All Rights Reserved */
29
30 /*
31 * University Copyright- Copyright (c) 1982, 1986, 1988
32 * The Regents of the University of California
33 * All Rights Reserved
34 *
35 * University Acknowledgment- Portions of this document are derived from
36 * software developed by the University of California, Berkeley, and its
37 * contributors.
38 */
39
40 /*LINTLIBRARY*/
41
42 #include <sys/types.h>
43 #include "curses_inc.h"
44 #include <fcntl.h>
45
46 /*
47 * Set the current time-out period for getting input.
48 *
49 * delay: < 0 for infinite delay (blocking read)
50 * = 0 for no delay read
51 * > 0 to specify a period in millisecs to wait
52 * for input, then return '\0' if none comes
53 */
54
55 static void _setblock(int), _settimeout(int);
56
57 int
ttimeout(int delay)58 ttimeout(int delay)
59 {
60 if (cur_term->_inputfd < 0)
61 return (ERR);
62
63 if (delay < 0)
64 delay = -1;
65
66 if (cur_term->_delay == delay)
67 goto good;
68
69 #ifdef SYSV
70 if (delay > 0) {
71 if (cur_term->_delay < 0)
72 _setblock(-delay);
73 _settimeout(delay);
74 } else
75 if ((delay + cur_term->_delay) == -1)
76 _setblock(delay);
77 else {
78 if (delay < 0)
79 _setblock(delay);
80 _settimeout(delay);
81 }
82 #else /* SYSV */
83 cbreak();
84 #endif /* SYSV */
85
86 cur_term->_delay = delay;
87 good:
88 return (OK);
89 }
90
91 #ifdef SYSV
92 /* set the terminal to nodelay (==0) or block(<0) */
93 static void
_setblock(int block)94 _setblock(int block)
95 {
96 int flags = fcntl(cur_term->_inputfd, F_GETFL, 0);
97
98 if (block < 0)
99 flags &= ~O_NDELAY;
100 else
101 flags |= O_NDELAY;
102
103 (void) fcntl(cur_term->_inputfd, F_SETFL, flags);
104 }
105
106 /*
107 * set the terminal to timeout in t milliseconds,
108 * rounded up to the nearest 10th of a second.
109 */
110 static void
_settimeout(int num)111 _settimeout(int num)
112 {
113 PROGTTYS.c_lflag &= ~ICANON;
114 if (num > 0) {
115 PROGTTYS.c_cc[VMIN] = 0;
116 PROGTTYS.c_cc[VTIME] = (num > 25500) ? 255 : (num + 99) / 100;
117 cur_term->_fl_rawmode = 3;
118 } else {
119 PROGTTYS.c_cc[VMIN] = 1;
120 PROGTTYS.c_cc[VTIME] = 0;
121 cur_term->_fl_rawmode = 1;
122 }
123 (void) reset_prog_mode();
124 }
125 #endif /* SYSV */
126