Function split_sandbox_path

crates/openshell-cli/src/ssh.rs:807–813

Split a sandbox path into (`parent_directory`, basename). Examples: `"/sandbox/.bashrc"` -> `("/sandbox", ".bashrc")` `"/sandbox/sub/file"` -> `("/sandbox/sub", "file")` `"file.txt"` -> `(".", "file.txt")`

(path: &str)

///   `"/sandbox/sub/file"` -> `("/sandbox/sub", "file")`
///   `"file.txt"`          -> `(".", "file.txt")`
fn split_sandbox_path(path: &str) -> (&str, &str) {
    match path.rfind('/') {
        Some(0) => ("/", &path[1..]),
        Some(pos) => (&path[..pos], &path[pos + 1..]),
        None => (".", path),
    }
}

/// Writable root inside every sandbox. Used as the boundary for path-traversal
/// checks on sandbox-side source paths in download flows.