Struct kvm_ioctls::Error [−][src]
pub struct Error(_);
Expand description
Wrapper over errno
.
The error number is an integer number set by system calls and some libc functions in case of error.
Implementations
impl Error
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impl Error
[src]pub fn last() -> Error
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pub fn last() -> Error
[src]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; // Reading from a file without permissions returns an error. let mut path = temp_dir(); path.push("test"); let mut file = File::create(path).unwrap(); let mut buf: Vec<u8> = Vec::new(); assert!(file.read_to_end(&mut buf).is_err()); // Retrieve the error number of the previous operation using `Error::last()`: let read_err = Error::last(); #[cfg(unix)] assert_eq!(read_err, Error::new(libc::EBADF)); #[cfg(not(unix))] assert_eq!(read_err, Error::new(libc::EIO));
Trait Implementations
impl Error for Error
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impl Error for Error
[src]fn source(&self) -> Option<&(dyn Error + 'static)>
1.30.0[src]
fn source(&self) -> Option<&(dyn Error + 'static)>
1.30.0[src]The lower-level source of this error, if any. Read more
fn backtrace(&self) -> Option<&Backtrace>
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fn backtrace(&self) -> Option<&Backtrace>
[src]🔬 This is a nightly-only experimental API. (
backtrace
)Returns a stack backtrace, if available, of where this error occurred. Read more
fn description(&self) -> &str
1.0.0[src]
fn description(&self) -> &str
1.0.0[src]👎 Deprecated since 1.42.0:
use the Display impl or to_string()
impl Copy for Error
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impl StructuralPartialEq for Error
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Auto Trait Implementations
impl RefUnwindSafe for Error
impl Send for Error
impl Sync for Error
impl Unpin for Error
impl UnwindSafe for Error
Blanket Implementations
impl<T> BorrowMut<T> for T where
T: ?Sized,
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impl<T> BorrowMut<T> for T where
T: ?Sized,
[src]pub fn borrow_mut(&mut self) -> &mut T
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pub fn borrow_mut(&mut self) -> &mut T
[src]Mutably borrows from an owned value. Read more
impl<T> ToOwned for T where
T: Clone,
[src]
impl<T> ToOwned for T where
T: Clone,
[src]type Owned = T
type Owned = T
The resulting type after obtaining ownership.
pub fn to_owned(&self) -> T
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pub fn to_owned(&self) -> T
[src]Creates owned data from borrowed data, usually by cloning. Read more
pub fn clone_into(&self, target: &mut T)
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pub fn clone_into(&self, target: &mut T)
[src]🔬 This is a nightly-only experimental API. (toowned_clone_into
)
recently added
Uses borrowed data to replace owned data, usually by cloning. Read more