1 /* $NetBSD: keywait.c,v 1.1.1.1 1996/01/07 21:50:50 leo Exp $ */ 2 3 /* 4 * Copyright (c) 1995 Waldi Ravens. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by Waldi Ravens. 18 * 4. The name of the author may not be used to endorse or promote products 19 * derived from this software without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #include <stdio.h> 34 #include <stdlib.h> 35 #include <unistd.h> 36 #include <termios.h> 37 #include "libtos.h" 38 39 int 40 key_wait(text) 41 char *text; 42 { 43 struct termios term_attr; 44 tcflag_t lfl_orig; 45 int any_key; 46 char c; 47 48 any_key = (text == NULL); 49 if (any_key) 50 text = "Press any key..."; 51 52 fprintf(stderr, text); 53 fflush(stderr); 54 55 tcgetattr(STDERR_FILENO, &term_attr); 56 lfl_orig = term_attr.c_lflag; 57 if (any_key) 58 term_attr.c_lflag &= ~ECHO; 59 term_attr.c_lflag &= ~ICANON; 60 tcsetattr(STDERR_FILENO, TCSAFLUSH, &term_attr); 61 read(STDERR_FILENO, &c, 1); 62 term_attr.c_lflag = lfl_orig; 63 tcsetattr(STDERR_FILENO, TCSAFLUSH, &term_attr); 64 65 fprintf(stderr, (any_key ? "\r" : "\r\n")); 66 fflush(stderr); 67 return(c); 68 } 69