Enum nix::Error

pub enum Error {
    Sys(Errno),
    InvalidPath,
    InvalidUtf8,
    UnsupportedOperation,
}

Nix Error Type

The nix error type provides a common way of dealing with various system system/libc calls that might fail. Each error has a corresponding errno (usually the one from the underlying OS) to which it can be mapped in addition to implementing other common traits.

Variants

Sys(Errno)

InvalidPath

InvalidUtf8

The operation involved a conversion to Rust’s native String type, which failed because the string did not contain all valid UTF-8.

UnsupportedOperation

The operation is not supported by Nix, in this instance either use the libc bindings or consult the module documentation to see if there is a more appropriate interface available.

Implementations

impl Error

pub fn as_errno(self) -> Option<Errno>

Convert this Error to an Errno.

Example

let e = Error::from(Errno::EPERM);
assert_eq!(Some(Errno::EPERM), e.as_errno());

pub fn from_errno(errno: Errno) -> Error

Create a nix Error from a given errno

pub fn last() -> Error

Get the current errno and convert it to a nix Error

pub fn invalid_argument() -> Error

Create a new invalid argument error (EINVAL)

Trait Implementations

impl Clone for Error

fn clone(&self) -> Error

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Error

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

Formats the value using the given formatter.

impl Display for Error

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

Formats the value using the given formatter.

impl Error for Error

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

The lower-level source of this error, if any.

pub fn backtrace(&self) -> Option<&Backtrace>

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

Returns a stack backtrace, if available, of where this error occurred.

pub fn description(&self) -> &str

👎 Deprecated since 1.42.0:

use the Display impl or to_string()

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

👎 Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

impl From<Errno> for Error

fn from(errno: Errno) -> Error

Performs the conversion.

impl From<FromUtf8Error> for Error

fn from(_: FromUtf8Error) -> Error

Performs the conversion.

impl PartialEq<Error> for Error

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

This method tests for self and other values to be equal, and is used by ==.

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

This method tests for !=.

impl Copy for Error

impl Eq for Error

impl StructuralEq for Error

impl StructuralPartialEq for Error