Library Unistd H [RECOMMENDED]

: One of the most famous C functions; it literally "clones" your program into two identical processes running simultaneously.

: Replaces the current process image with a new one (how your terminal launches other apps). getpid() : Tells the program its own unique process ID. ⏱️ System & Time Library Unistd H

If you tell me (like a shell, a file copier, or a background timer), I can give you a specific code snippet using these functions. : One of the most famous C functions;

While handles high-level streams (like printf ), works with low-level . a file copier