ref: ec5f2d23637dadf6d2893bf6f2f829b070ec3b34
dir: /lib/std/mkpath.myr/
use "syswrap" use "errno" pkg std = const mkpath : (p : byte[:], mode : int64 -> errno) ;; const mkpath = {p, mode var st for var i = 0; i < p.len; i++ if p[i] == ('/' : byte) && i != 0 st = mkdir(p[:i], mode) if st != 0 && st != Eexist -> st ;; ;; ;; -> Enone }