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/*
*
* This is free software. You can redistribute it and/or modify under
* the terms of the GNU General Public License version 2.
*
* Copyright (C) 1998 by kra
*
*/
#include "hunt.h"
#include <termios.h>
#include <unistd.h>
#include <stdio.h>
static struct termios save_termios;
static int ttysavefd = -1;
static enum { RESET, RAW, CBREAK } ttystate = RESET;
/* put terminal into a cbreak mode */
int tty_cbreak(int fd, int wait_for_chars, int timer_dsec)
{
struct termios buf;
if (tcgetattr(fd, &save_termios) < 0)
return -1;
buf = save_termios;
buf.c_lflag &= ~(ECHO | ICANON); /* echo off, canonical mode off */
buf.c_cc[VMIN] = wait_for_chars;
buf.c_cc[VTIME] = timer_dsec;
if (tcsetattr(fd, TCSAFLUSH, &buf) < 0)
return -1;
ttystate = CBREAK;
ttysavefd = fd;
return 0;
}
/* put terminal into a raw mode */
int tty_raw(int fd, int wait_for_chars, int timer_dsec)
{
struct termios buf;
if (tcgetattr(fd, &save_termios) < 0)
return -1;
buf = save_termios;
buf.c_lflag &= ~(ECHO | ICANON | IEXTEN | ISIG);
/* echo off, canonical mode off, extended input
processing off, signal chars off */
buf.c_iflag &= ~(BRKINT | ICRNL | INPCK | ISTRIP | IXON);
/* no SIGINT on BREAK, CR-to-NL off, input parity
check off, don't strip 8th bit on input,
output flow control off */
buf.c_cflag &= ~(CSIZE | PARENB);
/* clear size bits, parity checking off */
buf.c_cflag |= CS8;
/* set 8 bits/char */
buf.c_oflag &= ~(OPOST);
/* output processing off */
buf.c_cc[VMIN] = wait_for_chars;
buf.c_cc[VTIME] = timer_dsec;
if (tcsetattr(fd, TCSAFLUSH, &buf) < 0)
return -1;
ttystate = RAW;
ttysavefd = fd;
return 0;
}
/* restore terminal's mode */
int tty_reset(int fd)
{
if (ttystate != CBREAK && ttystate != RAW)
return 0;
if (tcsetattr(fd, TCSAFLUSH, &save_termios) < 0)
return -1;
ttystate = RESET;
return(0);
}
/* can be set up by atexit(tty_atexit) */
void tty_atexit(void)
{
if (ttysavefd >= 0 && ttystate != RESET)
tty_reset(ttysavefd);
}
/* reset linux terminal */
void tty_tput_reset(void)
{
printf("\033c\033]R");
fflush(stdout);
}
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