minitalk

minitalk is a project at 42 that aims to create a communication program between a client and a server using UNIX signals.

Getting Started

To use this program, you need to clone this repository and compile it with make. This will generate two executable files: server and client.

Usage

To use this program in your own project, you need to run the server program first and note its PID. Then you can run the client program with two arguments: the server PID and the string to send. For example:

./server
Server PID: 1234

./client 1234 "Hello world!"

The server will display the string received from the client using only UNIX signals. The communication protocol uses one bit per signal: SIGUSR1 for 0 and SIGUSR2 for 1.

Requirements

The project has the following requirements:

• The client must communicate the string passed as argument to the server
• The server must display the string received as fast as possible
• The server must be able to receive strings from several clients in a row without restarting
• Only two signals are allowed: SIGUSR1 and SIGUSR2
• The program must handle errors properly

Bonus

The project has the following bonus features:

• The server sends a confirmation signal to the client after receiving each bit
• The program supports unicode characters by using more than one byte per character

Functions

In the project you can use the following functions from the standard C library and the UNIX system calls:

• write
• ft_printf (my own printf function)
• signal
• sigemptyset
• sigaddset
• sigaction
• kill
• getpid
• malloc
• free
• pause
• sleep
• usleep
• exit