No feedback from the author, no explaining what the code does at a level for people new to zig, no explanations of the fundamental problem (i.e. files, buffers, and flow of data, and how to write that as code) and how it relates to what zig is doing, no alternate solution for how zig or other languages might try to solve the problem.
I have a strong suspicion that people are upvoting this based on the title of 'Zig' and 'unsafe' instead of the actual substance of the post.