Minitalk

The purpose of this project is to code a small data exchange program using UNIX signals.

Grade : 125/100
Subjects v.3 : FR EN
42 Norm v.4 : FR EN

Content

The project contains two programs server and client.

• At launch, server prints its PID and waits for incoming messsages.
• The client takes to arguments : the server PID and the string to send.

Communication between the two is done only using UNIX signals SIGUSR1 and SIGUSR2. Once the server has received the entire message, it prints it and wait for new incoming messages.

To achieve this project, one must know how to use signals in a secure manner, to handle interference from external signals and ensure the integrity of the message under all circumstances. Optimization is essential to achieve quick communication between the programs. The communication itself uses binary encryption with an approach compatible with Unicode encoding.

Usage

Git clone with :

git clone https://github.com/celinenguyentu/Minitalk && cd Minitalk

Requirements

This project is written in C language and need either gcc or clang compiler, with <signal.h>, <stdlib.h>, <stdarg.h> and <unistd.h> standard libraries to run.

Compilation

• makeor make all - compile binaries server and client
• make bonus - compile binaries server and client (bonus version)
• make fclean - remove all object files and binaries

Launch programs

After compiling the binary files, open two shell windows and launch the server first :

./server

In the other window, launch a client with the message to send :

./client <server PID> <message>

In the bonus version, any client is able to quit the server by sending the message exit.

Example

Testers

Those are third-party tester to run complementary tests, use them at your own risk :

• @ThibaudM13 minitalk-Tester
• @xicodomingues francinette