Struct ExitError 

pub struct ExitError<S: AsRef<str>> { /* private fields */ }

This struct contains an exit code and basic error information (from PrintableErrno). Unless you unwrap the error on a Result containing an ExitError, you probably won’t use this directly.

When printed, the error message will look like the following:

• If there is an associated errno: $program_name: $message: ${errno.desc()}
• If there is no errno (originally called from printable_error): $program_name: $message

Printed error tries to follow perror(3p)’s format with the addition of the program name.

eprint_and_exit and eprint_signal_safe_exit also call exit(exit_code) and _exit(exit_code) respectively, exiting the process with the supplied exit code.

Implementations

impl<S: AsRef<str>> ExitError<S>

pub fn eprint_and_exit(self) -> !

Print the error to stderr and exit with the supplied code.

Safety

The caller must ensure that stderr (fd 2) is open.

pub unsafe fn eprint_signal_safe_exit(self) -> !

Same as ExitError::eprint_and_exit, but attempts to write() directly to stderr and not to call any non-signal-safe functions. Useful when one is the child in a multi-threaded program after a call to fork().

Safety

The caller must ensure that stderr (fd 2) remains open for the entirety of this function call.

_exit is safe to call from the fork()-ed child as it’s signal-safe. However, it doesn’t call destructors (as opposed to exiting from main) nor does it call any exit functions if they are set, so caller should only call this from a fork()-ed child.

Trait Implementations

impl<S: Debug + AsRef<str>> Debug for ExitError<S>

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

Formats the value using the given formatter.

impl<S: AsRef<str>> Display for ExitError<S>

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

Formats the value using the given formatter.

impl<S: AsRef<str> + Debug> Error for ExitError<S>

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<ExitError<&str>> for ExitError<String>

fn from(item: ExitError<&str>) -> Self

Converts to this type from the input type.