rust-lang/rust-clippy
TOCTOU: call `Path::metadata` after `Path::exists`
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#17,158 opened on 2026/06/04
A-lintgood first issue
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説明
What it does
Detect when calling Path::exists followed by another operation that would cause a new syscall to be used on the path, like Path::metadata.
Advantage
Remove a source of TOCTOU bugs.
Drawbacks
No response
Example
if new_path.exists() {
let md = new_path.metadata().unwrap();
Could be written as:
if let Ok(md) = new_path.metadata() {
Comparison with existing lints
No response