nmps/getch.h at master · kocotian/nmps · GitHub

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/* UNLICENSED */

#include <sys/ioctl.h>
#include <stdio.h>
#include <termios.h>
#include <unistd.h>

static struct termios old, current;

/* Initialize new terminal i/o settings */
void
initTermios(int echo)
{
    tcgetattr(0, &old); /* grab old terminal i/o settings */
    current = old; /* make new settings same as old settings */
    current.c_lflag &= ~ICANON; /* disable buffered i/o */
    if(echo)
		current.c_lflag |= ECHO; /* set echo mode */
    else
		current.c_lflag &= ~ECHO; /* set no echo mode */
    tcsetattr(0, TCSANOW, &current); /* use these new terminal i/o settings now */
}

/* Restore old terminal i/o settings */
void
resetTermios(void)
{
    tcsetattr(0, TCSANOW, &old);
}

char
getch(char echo)
{
    char ch;
    initTermios(echo);
    ch = getchar();
    resetTermios();
    return ch;
}