Efficiently Traverse Directory Tree with opendir(), readdir() and closedir()

Question

The C routines opendir(), readdir() and closedir() provide a way for me to traverse a directory structure. However, each dirent structure returned by readdir() does not seem

Answer 1

Have you tried ftw() aka File Tree Walk ?

Snippit from man 3 ftw:

int ftw(const char *dir, int (*fn)(const char *file, const struct stat *sb, int flag), int nopenfd);

ftw() walks through the directory tree starting from the indicated directory dir. For each found entry in the tree, it calls fn() with the full pathname of the entry, a pointer to the stat(2) structure for the entry and an int flag