conio.h

#include <termios.h>
#include <stdio.h>
static struct termios old, new;

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

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

/* Read 1 character - echo defines echo mode */
char getch_(int echo)
{
	char ch;
	initTermios(echo);
	ch = getchar();
	resetTermios();
	return ch;
}

/* Read 1 character without echo */
char getch(void)
{
	return getch_(0);
}

/* Read 1 character with echo */
char getche(void)
{
	return getch_(1);
}