Struct Pidfile 

pub struct Pidfile { /* private fields */ }

Implementations

impl Pidfile

pub fn new(path: PathBuf) -> Self

pub fn acquire(&self) -> Result<()>

Atomically create the pidfile and write our PID into it. Fails if the file already exists (intentional — caller must preflight stale files).

pub fn release(&self) -> Result<()>

Best-effort removal. Returns Ok if the file was already missing.

pub fn read(&self) -> Result<Option<u32>>

Returns the PID stored in the pidfile, or Ok(None) if the file is missing. Unparseable contents return Err.