//-------------------------------------------------------------------
//	noecho.cpp
//
//	This example program is written in a high-level language in
//	order to more clearly illustrate an important idea in Linux
//	"systems programming" (which will be needed for Project 2).
//	
//	Adapted from: Michael K. Johnson and Erik W. Troan, "Linux
//	Application Development," Addison-Wesley (1998), 267-274.
//
//	programmer: ALLAN CRUSE
//	written on: 11 SEP 2003
//-------------------------------------------------------------------

#include <stdio.h>	// for printf(), perror() 
#include <fcntl.h>	// for open() 
#include <stdlib.h>	// for exit() 
#include <unistd.h>	// for read(), write(), close() 
#include <termios.h>	// for tcgetarrt(), tcsetattr()

#define MAX_INPUT 	40

int main( int argc, char **argv )
{
	//----------
	// prologue
	//----------
	// preserve tty settings
	struct termios	orig_termios;
	tcgetattr( STDIN_FILENO, &orig_termios );
	// reconfigure the tty
	struct termios	temp_termios = orig_termios;
	temp_termios.c_lflag &= ~ECHO;
	temp_termios.c_lflag |= ECHONL;
	tcsetattr( STDIN_FILENO, TCSANOW, &temp_termios );

	//-------------
	// main action
	//-------------
       	// obtain_input
	char	prompt[] = "\n\tPlease type in your name: ";
	write( STDOUT_FILENO, prompt, sizeof( prompt ) );	
	char	buffer[ MAX_INPUT ] = "";
	read( STDIN_FILENO, buffer, MAX_INPUT );	
	// process_data
	if (( buffer[0] >= 'a' )&&( buffer[0] <= 'z' )) buffer[0] -= 32;
	// print_output
	printf( "\n\tThank you, %s\n", buffer );

	//----------
	// epilogue
	//---------- 
	// restore original tty settings
	tcsetattr( STDIN_FILENO, TCSANOW, &orig_termios );
}