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FsSandbox

mlua_pkg::sandbox

Struct FsSandbox 

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pub struct FsSandbox { /* private fields */ }
Expand description

Real filesystem-based sandbox implementation.

Canonicalizes the root at construction time and performs traversal validation on every read.

§Security boundary

This sandbox provides casual escape prevention for trusted directories, not a security guarantee for adversarial environments.

§Known limitations

  • TOCTOU: Vulnerable to symlink swap attacks between canonicalize() and read_to_string(). For adversarial inputs, use [CapSandbox] (requires the sandbox-cap-std feature) which eliminates the gap via OS-level capability-based file access.

  • Windows device names: No defense against reserved device names like NUL, CON, PRN, etc. Risk of DoS/hang on Windows.

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impl FsSandbox

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pub fn new(root: impl Into<PathBuf>) -> Result<Self, InitError>

Trait Implementations§

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impl SandboxedFs for FsSandbox

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fn read(&self, relative: &Path) -> Result<Option<FileContent>, ReadError>

Read a file by relative path. Read more

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Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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