42 Exam 06 Guide

: Copy your master track set ( current_set ) into the operational sets ( read_set and write_set ) right before calling select() .

To prevent this without resorting to multi-threading, Exam 06 requires the use of select() . The select() system call allows a program to monitor multiple file descriptors, waiting until one or more of them become "ready" for an I/O operation (e.g., input possible, or writing won't block).

For more tips on 42 school curriculum, check out the 42 intranet . 42 Exam 06

: Extracts pending connections to generate a unique client fd. recv() / send() : Transfers raw bytes across active sockets. Structural Analysis of mini_serv

: Iterate through all active file descriptors from 0 up to max_fd . : Copy your master track set ( current_set

: Extract the first connection request on the queue, creating a new dedicated socket descriptor for that specific client. I/O Multiplexing with select()

[Start] -> socket() -> bind() -> listen() -> select() Loop | +-----------------------------------+-----------------------------------+ | (New Connection) | (Data Available / Drop) v v accept() -> Assign unique ID -> Broadcast Arrival recv() -> Process buffer -> Broadcast or close() : Initializes the primary endpoint. bind() : Attaches the socket to a port. listen() : Puts the server in passive listening mode. For more tips on 42 school curriculum, check

Week 1 — Fundamentals