Enum PidLockError 

pub enum PidLockError {
    AlreadyRunning {
        pid: u32,
    },
    Io(Error),
}

Error acquiring or maintaining a PidLockGuard.

Variants

AlreadyRunning

Another process already holds the exclusive lock on the pid file.

The inner pid is read back from the file’s contents; it is 0 if the file could not be read or its contents could not be parsed as a PID.

Fields

pid: u32

PID of the process currently holding the lock, or 0 if unknown.

Io(Error)

A filesystem error occurred while opening, locking, or writing the pid file.

Trait Implementations

impl Debug for PidLockError

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

Formats the value using the given formatter.

impl Display for PidLockError

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

Formats the value using the given formatter.

impl Error for PidLockError

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.

impl From<Error> for PidLockError

fn from(source: Error) -> Self

Converts to this type from the input type.