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 #pragma ident "%Z%%M% %I% %E% SMI"
41
42 /*LINTLIBRARY*/
43
44 #include <unistd.h>
45 #include <sys/types.h>
46 #include "curses_inc.h"
47
48 /*
49 * Code for various kinds of delays. Most of this is nonportable and
50 * requires various enhancements to the operating system, so it won't
51 * work on all systems. It is included in curses to provide a portable
52 * interface, and so curses itself can use it for function keys.
53 */
54
55 #define NAPINTERVAL 100
56 /*
57 * Wait until the output has drained enough that it will only take
58 * ms more milliseconds to drain completely.
59 * Needs Berkeley TIOCOUTQ ioctl. Returns ERR if impossible.
60 */
61
62 int
draino(int ms)63 draino(int ms)
64 {
65 #ifdef TIOCOUTQ
66 #define _DRAINO
67 /* number of chars = that many ms */
68 long ncneeded;
69
70 /* 10 bits/char, 1000 ms/sec, baudrate in bits/sec */
71 ncneeded = SP->baud * ms / (10 * 1000);
72 /*CONSTCOND*/
73 while (TRUE) {
74 int rv; /* ioctl return value */
75 int ncthere = 0; /* number of chars actually in */
76 /* output queue */
77
78 rv = ioctl(cur_term->Filedes, TIOCOUTQ, &ncthere);
79 #ifdef DEBUG
80 if (outf)
81 fprintf(outf, "draino: rv %d, ncneeded %d, "
82 "ncthere %d\n", rv, ncneeded, ncthere);
83 #endif /* DEBUG */
84 if (rv < 0)
85 return (ERR); /* ioctl didn't work */
86 if (ncthere <= ncneeded)
87 return (OK);
88 (void) napms(NAPINTERVAL);
89 }
90 #else /* TIOCOUTQ */
91
92 #ifdef TCSETAW
93 #define _DRAINO
94 /*
95 * SYSV simulation - waits until the entire queue is empty,
96 * then sets the state to what it already is (e.g. no-op).
97 * Unfortunately this only works if ms is zero.
98 */
99 if (ms <= 0) {
100 #ifdef SYSV
101 if (prog_istermios < 0) {
102 int i;
103
104 PROGTTY.c_lflag = PROGTTYS.c_lflag;
105 PROGTTY.c_oflag = PROGTTYS.c_oflag;
106 PROGTTY.c_iflag = PROGTTYS.c_iflag;
107 PROGTTY.c_cflag = PROGTTYS.c_cflag;
108 for (i = 0; i < NCC; i++)
109 PROGTTY.c_cc[i] = PROGTTYS.c_cc[i];
110 (void) ioctl(cur_term->Filedes, TCSETAW, &PROGTTY);
111 } else
112 (void) ioctl(cur_term->Filedes, TCSETSW, &PROGTTYS);
113 #else /* SYSV */
114 (void) ioctl(cur_term->Filedes, TCSETAW, &PROGTTY);
115 #endif /* SYSV */
116 return (OK);
117 } else
118 return (ERR);
119 #endif /* TCSETAW */
120 #endif /* TIOCOUTQ */
121
122 #ifndef _DRAINO
123 /*
124 * No way to fake it, so we return failure.
125 * Used #else to avoid warning from compiler about unreached stmt
126 */
127 return (ERR);
128 #endif /* _DRAINO */
129 /*NOTREACHED*/
130 }
131