1258945Sroberto/* 2258945Sroberto * Copyright (C) 2004, 2007 Internet Systems Consortium, Inc. ("ISC") 3258945Sroberto * Copyright (C) 2000, 2001 Internet Software Consortium. 4258945Sroberto * 5258945Sroberto * Permission to use, copy, modify, and/or distribute this software for any 6258945Sroberto * purpose with or without fee is hereby granted, provided that the above 7258945Sroberto * copyright notice and this permission notice appear in all copies. 8258945Sroberto * 9258945Sroberto * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH 10258945Sroberto * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY 11258945Sroberto * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT, 12258945Sroberto * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM 13258945Sroberto * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE 14258945Sroberto * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR 15258945Sroberto * PERFORMANCE OF THIS SOFTWARE. 16258945Sroberto */ 17258945Sroberto 18258945Sroberto/* $Id: keyboard.c,v 1.13 2007/06/19 23:47:18 tbox Exp $ */ 19258945Sroberto 20258945Sroberto#include <config.h> 21258945Sroberto 22258945Sroberto#include <sys/param.h> 23258945Sroberto#include <sys/types.h> 24258945Sroberto#include <sys/time.h> 25258945Sroberto#include <sys/uio.h> 26258945Sroberto 27258945Sroberto#include <errno.h> 28258945Sroberto#include <stdlib.h> 29258945Sroberto#include <string.h> 30258945Sroberto#include <termios.h> 31258945Sroberto#include <unistd.h> 32258945Sroberto#include <fcntl.h> 33258945Sroberto 34258945Sroberto#include <isc/keyboard.h> 35258945Sroberto#include <isc/util.h> 36258945Sroberto 37258945Srobertoisc_result_t 38258945Srobertoisc_keyboard_open(isc_keyboard_t *keyboard) { 39258945Sroberto int fd; 40258945Sroberto isc_result_t ret; 41258945Sroberto struct termios current_mode; 42258945Sroberto 43258945Sroberto REQUIRE(keyboard != NULL); 44258945Sroberto 45258945Sroberto fd = open("/dev/tty", O_RDONLY, 0); 46258945Sroberto if (fd < 0) 47258945Sroberto return (ISC_R_IOERROR); 48258945Sroberto 49258945Sroberto keyboard->fd = fd; 50258945Sroberto 51258945Sroberto if (tcgetattr(fd, &keyboard->saved_mode) < 0) { 52258945Sroberto ret = ISC_R_IOERROR; 53258945Sroberto goto errout; 54258945Sroberto } 55258945Sroberto 56258945Sroberto current_mode = keyboard->saved_mode; 57258945Sroberto 58258945Sroberto current_mode.c_iflag &= 59258945Sroberto ~(IGNBRK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON); 60258945Sroberto current_mode.c_oflag &= ~OPOST; 61258945Sroberto current_mode.c_lflag &= ~(ECHO|ECHONL|ICANON|ISIG|IEXTEN); 62258945Sroberto current_mode.c_cflag &= ~(CSIZE|PARENB); 63258945Sroberto current_mode.c_cflag |= CS8; 64258945Sroberto 65258945Sroberto current_mode.c_cc[VMIN] = 1; 66258945Sroberto current_mode.c_cc[VTIME] = 0; 67258945Sroberto if (tcsetattr(fd, TCSAFLUSH, ¤t_mode) < 0) { 68258945Sroberto ret = ISC_R_IOERROR; 69258945Sroberto goto errout; 70258945Sroberto } 71258945Sroberto 72258945Sroberto keyboard->result = ISC_R_SUCCESS; 73258945Sroberto 74258945Sroberto return (ISC_R_SUCCESS); 75258945Sroberto 76258945Sroberto errout: 77258945Sroberto close (fd); 78258945Sroberto 79258945Sroberto return (ret); 80258945Sroberto} 81258945Sroberto 82258945Srobertoisc_result_t 83258945Srobertoisc_keyboard_close(isc_keyboard_t *keyboard, unsigned int sleeptime) { 84258945Sroberto REQUIRE(keyboard != NULL); 85258945Sroberto 86258945Sroberto if (sleeptime > 0 && keyboard->result != ISC_R_CANCELED) 87258945Sroberto (void)sleep(sleeptime); 88258945Sroberto 89258945Sroberto (void)tcsetattr(keyboard->fd, TCSAFLUSH, &keyboard->saved_mode); 90258945Sroberto (void)close(keyboard->fd); 91258945Sroberto 92258945Sroberto keyboard->fd = -1; 93258945Sroberto 94258945Sroberto return (ISC_R_SUCCESS); 95258945Sroberto} 96258945Sroberto 97258945Srobertoisc_result_t 98258945Srobertoisc_keyboard_getchar(isc_keyboard_t *keyboard, unsigned char *cp) { 99258945Sroberto ssize_t cc; 100258945Sroberto unsigned char c; 101258945Sroberto cc_t *controlchars; 102258945Sroberto 103258945Sroberto REQUIRE(keyboard != NULL); 104258945Sroberto REQUIRE(cp != NULL); 105258945Sroberto 106258945Sroberto cc = read(keyboard->fd, &c, 1); 107258945Sroberto if (cc < 0) { 108258945Sroberto keyboard->result = ISC_R_IOERROR; 109258945Sroberto return (keyboard->result); 110258945Sroberto } 111258945Sroberto 112258945Sroberto controlchars = keyboard->saved_mode.c_cc; 113258945Sroberto if (c == controlchars[VINTR] || c == controlchars[VQUIT]) { 114258945Sroberto keyboard->result = ISC_R_CANCELED; 115258945Sroberto return (keyboard->result); 116258945Sroberto } 117258945Sroberto 118258945Sroberto *cp = c; 119258945Sroberto 120258945Sroberto return (ISC_R_SUCCESS); 121258945Sroberto} 122258945Sroberto 123258945Srobertoisc_boolean_t 124258945Srobertoisc_keyboard_canceled(isc_keyboard_t *keyboard) { 125258945Sroberto return (ISC_TF(keyboard->result == ISC_R_CANCELED)); 126258945Sroberto} 127