What does "Write failed: success" mean?

Question

*nix-like systems

I was reading this article
and came across a screenshot

. I didn’t google the answer.
What does such a conclusion mean? What causes it?

Answer 1

What does such a conclusion mean? What causes it?

Means that the operation was unsuccessful, but the error code was handled incorrectly.
Most often, this occurs when working with interfaces using errno - the C or POSIX library, due to the fact that after the erroneous function, at least one more function is executed that changes errno, which fulfills successfully.