== Why is this an issue?

Using non-octal values to set Unix file permissions is problematic because they are converted to octal internally, which can lead to unexpected file permissions and potential security issues.


=== Code examples

==== Noncompliant code example

[source,rust,diff-id=1,diff-type=noncompliant]
----
use std::fs::OpenOptions;
use std::os::unix::fs::OpenOptionsExt;

let mut options = OpenOptions::new();
options.mode(644); // Noncompliant: Non-octal value used.
----

==== Compliant solution

[source,rust,diff-id=1,diff-type=compliant]
----
use std::fs::OpenOptions;
use std::os::unix::fs::OpenOptionsExt;

let mut options = OpenOptions::new();
options.mode(0o644); // Compliant: Octal value used.
----

== Resources
=== Documentation

* Clippy Lints - https://rust-lang.github.io/rust-clippy/master/index.html#non_octal_unix_permissions