From the NannyMUD documentation

LAST CHANGE

2004-02-15

FUNCTION

NAME
        get_dirs - get directories from here, and below


SYNTAX
        string *get_dirs(string path)

LOCATION
        /obj/support

DESCRIPTION
        Given a path, this function returns a list of all directories
        from that path and below.


NOTE
        The function will try to read in dirs without checking if it
        is allowed by the ACL system, thus leaving a trail in the log
        files.


NOTE
        This function isn't as useful as you might think; for large
        dirs it will run into the max eval limits.