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