rmdir
Removes an empty directory.
Deletes the named directory, which must be empty. If no argument
is given, uses $_. Returns 1 on success, 0 on failure. On
failure, sets $! to the OS error code (e.g. ENOTEMPTY,
ENOENT, EACCES).
Only empty directories can be removed; use File::Path::rmtree
for recursive deletion.
Synopsis
rmdir("olddir") or die "Cannot rmdir: $!";
rmdir $_; # uses $_ if no argument