/*
* Copyright (C) 2004, 2007 Internet Systems Consortium, Inc. ("ISC")
* Copyright (C) 2000, 2001 Internet Software Consortium.
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
* OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
/* $Id: keyboard.c,v 1.13 2007/06/19 23:47:18 tbox Exp $ */
#include <config.h>
#include <sys/param.h>
#include <sys/types.h>
#include <sys/time.h>
#include <sys/uio.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <termios.h>
#include <unistd.h>
#include <fcntl.h>
#include <isc/keyboard.h>
#include <isc/util.h>
isc_result_t
isc_keyboard_open(isc_keyboard_t *keyboard) {
int fd;
isc_result_t ret;
struct termios current_mode;
REQUIRE(keyboard != NULL);
fd = open("/dev/tty", O_RDONLY, 0);
if (fd < 0)
return (ISC_R_IOERROR);
keyboard->fd = fd;
if (tcgetattr(fd, &keyboard->saved_mode) < 0) {
ret = ISC_R_IOERROR;
goto errout;
}
current_mode = keyboard->saved_mode;
current_mode.c_iflag &=
~(IGNBRK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON);
current_mode.c_oflag &= ~OPOST;
current_mode.c_lflag &= ~(ECHO|ECHONL|ICANON|ISIG|IEXTEN);
current_mode.c_cflag &= ~(CSIZE|PARENB);
current_mode.c_cflag |= CS8;
current_mode.c_cc[VMIN] = 1;
current_mode.c_cc[VTIME] = 0;
if (tcsetattr(fd, TCSAFLUSH, ¤t_mode) < 0) {
ret = ISC_R_IOERROR;
goto errout;
}
keyboard->result = ISC_R_SUCCESS;
return (ISC_R_SUCCESS);
errout:
close (fd);
return (ret);
}
isc_result_t
isc_keyboard_close(isc_keyboard_t *keyboard, unsigned int sleeptime) {
REQUIRE(keyboard != NULL);
if (sleeptime > 0 && keyboard->result != ISC_R_CANCELED)
(void)sleep(sleeptime);
(void)tcsetattr(keyboard->fd, TCSAFLUSH, &keyboard->saved_mode);
(void)close(keyboard->fd);
keyboard->fd = -1;
return (ISC_R_SUCCESS);
}
isc_result_t
isc_keyboard_getchar(isc_keyboard_t *keyboard, unsigned char *cp) {
ssize_t cc;
unsigned char c;
cc_t *controlchars;
REQUIRE(keyboard != NULL);
REQUIRE(cp != NULL);
cc = read(keyboard->fd, &c, 1);
if (cc < 0) {
keyboard->result = ISC_R_IOERROR;
return (keyboard->result);
}
controlchars = keyboard->saved_mode.c_cc;
if (c == controlchars[VINTR] || c == controlchars[VQUIT]) {
keyboard->result = ISC_R_CANCELED;
return (keyboard->result);
}
*cp = c;
return (ISC_R_SUCCESS);
}
isc_boolean_t
isc_keyboard_canceled(isc_keyboard_t *keyboard) {
return (ISC_TF(keyboard->result == ISC_R_CANCELED));
}
