用于操纵给定路径的递归函数

I am working on modifying the didactic OS xv6 (written in c) to support symbolic links (AKA shortcuts). A symbolic link is a file of type T_SYM that contains a path to it's destination. For doing that, i wrote a recursive function that gets a path and a buffer and fills the buffer with the "real" path (i.e. if the path contains a link, it should be replaced by the real path, and a link can occur at any level in the path).I am working on modifying the didactic OS xv6 (