est specified in octal, like 8r666 or 8r400. Windows will not differentiate between user, group, and other permissions, and thus will combine all of these permissions. Returns nil.</pre><a href="https://janetdocs.org/os/chmod">Community Examples</a></div><hr><div class="binding"><span id="os/clock" class="binding-sym">os/clock</span> <span class="binding-type">cfunction</span> <span class="binding-type"><a href="https://github.com/janet-lang/janet/blob/0d9e999/src/core/os.c#L1567">source</a></span> <pre cla