As simple as listing the files in a directory.
The project ft_ls opens the path to the Unix branch of the sphere system. For the first time, I had to face the one libc functions that allowed me to do other things than just read or write on a file descriptor (this is to simplify of course). I discovered a sub-system of functions of operating system’s API, the associated data structures, as well as the management of memory allocation and the associated data. ft_ls was also a great opportunity to think about the structure of my code before I even start writing my code. ft_ls bad reputation is due to students discovering too late in the game that their (lack of) initial design is preventing them from finishing their project without refactorizing a great part of their code. I admit that it can be frustrating... To conclude, ft_ls is another opportunity to add to my libft new practical functions. Browsing a file and identifying directories is quite common in programming.