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clarify what you cannot do

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This commit is contained in:
Ralf Jung 2023-08-22 09:00:07 +02:00
parent 2cb9d3def2
commit 6d65379e7a
1 changed files with 3 additions and 3 deletions
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6
library/std/src/io/mod.rs
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@ -255,9 +255,9 @@
//! The platform-specific parts of the Rust standard library expose types that reflect these
//! concepts, see [`os::unix`] and [`os::windows`].
//!
//! To uphold I/O safety, it is crucial that no code acts on file descriptors it does not own. In
//! other words, a safe function that takes a regular integer, treats it as a file descriptor, and
//! acts on it, is *unsound*.
//! To uphold I/O safety, it is crucial that no code acts on file descriptors it does not own or
//! borrow, and no code closes file descriptors it does not own. In other words, a safe function
//! that takes a regular integer, treats it as a file descriptor, and acts on it, is *unsound*.
//!
//! Not upholding I/O safety and acting on a file descriptor without proof of ownership can lead to
//! misbehavior and even Undefined Behavior in code that relies on ownership of its file