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 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