Struct AttrUpdate 

pub struct AttrUpdate {
    pub mode: Option<u32>,
    pub uid: Option<u32>,
    pub gid: Option<u32>,
    pub size: Option<u64>,
    pub mtime_sec: Option<i64>,
}

Optional fields a caller may update via PlatformShell::set_attrs. Every field is Option<_>; None means “leave alone” (the kernel passes None for slots the chmod/chown/truncate/utimensat call didn’t touch).

Heddle’s tree model only carries three modes (FileMode::Normal, FileMode::Executable, FileMode::Symlink) — see crates/objects/src/object/tree_types.rs. A chmod that flips the user-executable bit (0o100) maps to the closest mode; bits outside that don’t persist across capture.

Fields

mode: Option<u32>

New unix mode bits (including the type bits). When set, the shell folds the user-executable bit into the captured FileMode; other bits don’t persist.

uid: Option<u32>

New uid. The mount has no per-node uid storage (every node reports the mount-owner’s uid); shells may accept this as a no-op so chown doesn’t return an error to callers that don’t actually need ownership tracking.

gid: Option<u32>

New gid. Same no-op contract as uid.

size: Option<u64>

New size. Truncates the hot-tier buffer (or seeds one from the durable predecessor and truncates) when set. O_TRUNC on the kernel side delivers setattr(size=0) before the first write.

mtime_sec: Option<i64>

New mtime in seconds since the UNIX epoch. The overlay has no per-node mtime storage today; shells accept this as a no-op so the kernel’s utimensat doesn’t return an error.

Trait Implementations

impl Clone for AttrUpdate

fn clone(&self) -> AttrUpdate

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for AttrUpdate

impl Debug for AttrUpdate

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for AttrUpdate

fn default() -> AttrUpdate

Returns the “default value” for a type.