isc/unix/keyboard.c

	keyboard.c revision 15a44745412679c30a6d022733925af70a38b715
a747113422afaa29ce72d2c5ba7f0b7ea9ec2054Evan Hunt/*
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt * Copyright (C) 2000  Internet Software Consortium.
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt *
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt * Permission to use, copy, modify, and distribute this software for any
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt * purpose with or without fee is hereby granted, provided that the above
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt * copyright notice and this permission notice appear in all copies.
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt *
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt * DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt * INTERNET SOFTWARE CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT,
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt * FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt * NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt */
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt/* $Id: keyboard.c,v 1.5 2000/07/27 09:52:49 tale Exp $ */
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt#include <config.h>
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt#include <sys/param.h>
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt#include <sys/types.h>
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt#include <sys/time.h>
4a53e3c2b83c476a93148eaee0272649beb221caMark Andrews#include <sys/uio.h>
4a53e3c2b83c476a93148eaee0272649beb221caMark Andrews
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt#include <errno.h>
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt#include <stdlib.h>
4a53e3c2b83c476a93148eaee0272649beb221caMark Andrews#include <string.h>
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt#include <termios.h>
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt#include <unistd.h>
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt#include <fcntl.h>
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt#include <isc/keyboard.h>
a747113422afaa29ce72d2c5ba7f0b7ea9ec2054Evan Hunt#include <isc/util.h>
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt
ef421f66f47224a42073deaf087378c5d0c9952eEvan Huntisc_result_t
4a53e3c2b83c476a93148eaee0272649beb221caMark Andrewsisc_keyboard_open(isc_keyboard_t *keyboard) {
4a53e3c2b83c476a93148eaee0272649beb221caMark Andrews    int fd;
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt    isc_result_t ret;
4a53e3c2b83c476a93148eaee0272649beb221caMark Andrews    struct termios current_mode;
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt    REQUIRE(keyboard != NULL);
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt    fd = open("/dev/tty", O_RDONLY, 0);
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt    if (fd < 0)
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt        return (ISC_R_IOERROR);
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt    keyboard->fd = fd;
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt    if (tcgetattr(fd, &keyboard->saved_mode) < 0) {
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt        ret = ISC_R_IOERROR;
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt        goto errout;
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt    }
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt    current_mode = keyboard->saved_mode;
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt    current_mode.c_iflag &=
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt            ~(IGNBRK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON);
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt    current_mode.c_oflag &= ~OPOST;
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt    current_mode.c_lflag &= ~(ECHO|ECHONL|ICANON|ISIG|IEXTEN);
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt    current_mode.c_cflag &= ~(CSIZE|PARENB);
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt    current_mode.c_cflag |= CS8;
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt    current_mode.c_cc[VMIN] = 1;
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt    current_mode.c_cc[VTIME] = 0;
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt    if (tcsetattr(fd, TCSAFLUSH, &current_mode) < 0) {
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt        ret = ISC_R_IOERROR;
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt        goto errout;
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt    }
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt    return (ISC_R_SUCCESS);
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt errout:
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt    close (fd);
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt    return (ret);
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt}
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt
ef421f66f47224a42073deaf087378c5d0c9952eEvan Huntisc_result_t
ef421f66f47224a42073deaf087378c5d0c9952eEvan Huntisc_keyboard_close(isc_keyboard_t *keyboard, unsigned int sleeptime) {
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt    REQUIRE(keyboard != NULL);
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt    if (sleeptime > 0)
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt        (void)sleep(sleeptime);
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt    (void)tcsetattr(keyboard->fd, TCSAFLUSH, &keyboard->saved_mode);
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt    close(keyboard->fd);
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt    keyboard->fd = -1;
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt    return (ISC_R_SUCCESS);
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt}
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt
ef421f66f47224a42073deaf087378c5d0c9952eEvan Huntisc_result_t
ef421f66f47224a42073deaf087378c5d0c9952eEvan Huntisc_keyboard_getchar(isc_keyboard_t *keyboard, unsigned char *cp) {
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt    ssize_t cc;
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt    unsigned char c;
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt    REQUIRE(keyboard != NULL);
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt    REQUIRE(cp != NULL);
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt    cc = read(keyboard->fd, &c, 1);
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt    if (cc < 0)
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt        return (ISC_R_IOERROR);
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt    *cp = c;
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt    return (ISC_R_SUCCESS);
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt}
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt