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 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