Do not use busy-waiting (while loops checking time). The Moulinette will penalize you for CPU overuse. Use usleep() to yield the CPU, but be careful— usleep() is inaccurate for long simulations. Use select() or nanosleep() for precision.
: Copy your master track set ( current_set ) into the operational sets ( read_set and write_set ) right before calling select() .
Because the exam is timed (usually 3 or 4 hours), you cannot afford to "think" about the architecture—you must have it in your muscle memory. 42 Exam 06
A socket is an endpoint for sending or receiving data across a computer network. In Exam 06, you configure an Internet Protocol (IPv4) socket using the Transmission Control Protocol (TCP). TCP guarantees reliable, ordered, and error-checked delivery of a stream of octets (bytes). Key system calls include: socket() : Creates the endpoint.
select() (The primary tool for monitoring multiple file descriptors) recv() , send() (Data transmission) write() , close() (Standard I/O operations) Do not use busy-waiting (while loops checking time)
The is the final technical hurdle of the common core curriculum at 42 Network schools. Known formally as the "mini_serv" exam, it tests your ability to build a non-blocking TCP/IP server from scratch using C.
Correctly identifying when a client connects or disconnects and notifying others. Use select() or nanosleep() for precision
Week 3 — Problem patterns & edge cases