TeomanDeniz/Minitalk

minitalk

Description: The purpose of this project is to code a small data exchange program using UNIX signals. It is an introductory project for the bigger UNIX projects that will appear later on in the cursus.

Project Info:

This project teaches you how to communicate 2 processes using only IPC signaling protocols. Which means no file transferring, no pipe and no internet communications.

The functions you can use in this project:

Function Name	In Code	Library
write	ssize_t write(int, void *, size_t);	#include <unistd.h>
ft_printf	int ft_printf(char *, ...);	#include "ft_printf.h"
signal	void signal(int, void (*)(int));	#include <signal.h>
sigemptyset	int sigemptyset(sigset_t *);	#include <signal.h>
sigaddset	int sigaddset(sigset_t *, int);	#include <signal.h>
sigaction	int sigaction(int, struct sigaction *, struct sigaction *);	#include <signal.h>
kill	int kill(pid_t, int);	#include <signal.h>
getpid	pid_t getpid(void);	#include <unistd.h>
malloc	void *malloc(size_t);	#include <stdlib.h>
free	void free(void *);	#include <stdlib.h>
pause	int pause(void);	#include <unistd.h>
sleep	unsigned sleep(unsigned int);	#include <unistd.h>
usleep	int usleep(useconds_t);	#include <unistd.h>
exit	void exit(int);	#include <stdlib.h>

We have to use only SIGUSR1 and SIGUSR2 signals. And it is important to know, these signals are exist only for let programers do with this 2 whatever they want. Source

SIGUSR1	Left for the programmers to do whatever they want.
SIGUSR2	Left for the programmers to do whatever they want.

Bonus:

In bonus part, server must send and information to client to make it aware that every byte client sended s successfully received.

Insted of usng sigaction() struct, I am combined client with server and server with client.

When you want to send your string to server from client; First, client sends 2 bytes (It's holding it's own PID address) to server for tell it to send your inform signals to this PID when any byte is successfully recieved.