Enum Mechanism 

#[non_exhaustive]
pub enum Mechanism {
    JobObject,
    CgroupV2,
    ProcessGroup,
}

The containment mechanism actually in effect for a process group.

Surfaced so callers can tell how the no-orphan guarantee is enforced — in particular when the mechanism is a POSIX process group rather than a cgroup or Job Object (the primary mechanism on macOS/BSD, and the Linux fallback when no cgroup is writable), which weakens the guarantee against children that call setsid.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

JobObject

Windows Job Object with JOB_OBJECT_LIMIT_KILL_ON_JOB_CLOSE.

CgroupV2

Linux cgroup v2, torn down via cgroup.kill.

ProcessGroup

POSIX process group, torn down via killpg. The primary mechanism on macOS and the BSDs, and the Linux fallback when no cgroup is writable. Weaker than a cgroup/Job Object: a child that calls setsid escapes it.

Trait Implementations

impl Clone for Mechanism

fn clone(&self) -> Mechanism

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Mechanism

impl Debug for Mechanism

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

Formats the value using the given formatter.

impl Eq for Mechanism

impl PartialEq for Mechanism

fn eq(&self, other: &Mechanism) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for Mechanism