Is it possible to implement functions like read, lseek, and write in the unix module?

[Tralalero-Tralalal]

I'm curious to the possibility of implementing the lseek, read, and write functions from the Unix module in this library, but found that they have been omitted. Before attempting to implement them, I thought it'd be appropriate to ask if it is possible? I don't see a reason why it wouldn't be, but I thought it would be appropriate to ask somebody who knows what they are doing. Thanks!

[Lysxia]

Adding them is fine by me. Feel free to open a PR.