Minitalk

Minitalk is a 42 project that implements a simple client-server communication system using UNIX signals. The client sends a string to the server, which then prints it character by character using signal-based transmission.

Features

• Sends messages from a client to a server using SIGUSR1 and SIGUSR2 signals.
• Handles signal reception properly to reconstruct and display messages.
• Ensures reliable message transmission without data loss.

Requirements

• The project must use only UNIX signals (no sockets or pipes).
• Implement proper signal handling to process messages efficiently.
• The server must display received messages correctly.

Compilation

Compile the project using:

make all

This will generate the server and client executables.

Usage

Start the server

Run the server and note the displayed PID:

./server

Send a message

Use the client to send a message to the server using its PID:

./client <server_pid> "Your message here"

Example:

./client 12345 "Hello, world!"

Signal Handling

• SIGUSR1 and SIGUSR2 are used to send bits of each character.
• The server reconstructs characters and prints them in order.
• The client ensures each bit is received before sending the next.

Error Handling

• The client checks for valid arguments (PID and message).
• The server ensures correct signal handling to avoid crashes.
• Proper error messages are displayed for incorrect usage.

Cleanup

To remove compiled files:

make fclean