Struct vmm_sys_util::errno::Error

pub struct Error(_);

Wrapper over errno.

The error number is an integer number set by system calls and some libc functions in case of error.

Methods

impl Error

pub fn new(errno: i32) -> Error

Creates a new error from the given error number.

Arguments

• errno: error number used for creating the Error.

Examples

extern crate vmm_sys_util;
use vmm_sys_util::errno::Error;

let err = Error::new(libc::EBADFD);

pub fn last() -> Error

Returns the last occurred errno wrapped in an Error.

Calling Error::last() is the equivalent of using errno in C/C++. The result of this function only has meaning after a libc call or syscall where errno was set.

Examples

extern crate vmm_sys_util;
use vmm_sys_util::errno::Error;
// Writing to an invalid file returns the error number EBADF.
let mut file = unsafe { File::from_raw_fd(-1) };
let _ = file.write(b"test");

// Retrieve the error number of the previous operation using `Error::last()`:
let write_err = Error::last();
assert_eq!(write_err, Error::new(libc::EBADF));

pub fn errno(self) -> i32

Returns the raw integer value (errno) corresponding to this Error.

Examples

extern crate vmm_sys_util;
use vmm_sys_util::errno::Error;

let err = Error::new(13);
assert_eq!(err.errno(), 13);

Trait Implementations

impl From<Error> for Error

fn from(e: Error) -> Self

Performs the conversion.

impl Clone for Error

fn clone(&self) -> Error

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Copy for Error

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 Display for Error

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

Formats the value using the given formatter.

impl Debug for Error

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

Formats the value using the given formatter.