Struct std::process::ExitStatusError
pub struct ExitStatusError(_);
Describes the result of a process after it has failed
Produced by the .exit_ok method on ExitStatus.
Examples
#![feature(exit_status_error)]
use std::process::{Command, ExitStatusError};
fn run(cmd: &str) -> Result<(),ExitStatusError> {
Command::new(cmd).status().unwrap().exit_ok()?;
Ok(())
}
run("true").unwrap();
run("false").unwrap_err();Implementations
impl ExitStatusError
pub fn code(&self) -> Option<i32>
Reports the exit code, if applicable, from an ExitStatusError.
In Unix terms the return value is the exit status: the value passed to exit, if the process finished by calling exit. Note that on Unix the exit status is truncated to 8 bits, and that values that didn’t come from a program’s call to exit may be invented by the runtime system (often, for example, 255, 254, 127 or 126).
On Unix, this will return None if the process was terminated by a signal. If you want to handle such situations specially, consider using methods from ExitStatusExt.
If the process finished by calling exit with a nonzero value, this will return that exit status.
If the error was something else, it will return None.
If the process exited successfully (ie, by calling exit(0)), there is no ExitStatusError. So the return value from ExitStatusError::code() is always nonzero.
Examples
#![feature(exit_status_error)]
use std::process::Command;
let bad = Command::new("false").status().unwrap().exit_ok().unwrap_err();
assert_eq!(bad.code(), Some(1));pub fn code_nonzero(&self) -> Option<NonZeroI32>
Reports the exit code, if applicable, from an ExitStatusError, as a NonZero
This is exactly like code(), except that it returns a NonZeroI32.
Plain code, returning a plain integer, is provided because is is often more convenient. The returned value from code() is indeed also nonzero; use code_nonzero() when you want a type-level guarantee of nonzeroness.
Examples
#![feature(exit_status_error)]
use std::convert::TryFrom;
use std::num::NonZeroI32;
use std::process::Command;
let bad = Command::new("false").status().unwrap().exit_ok().unwrap_err();
assert_eq!(bad.code_nonzero().unwrap(), NonZeroI32::try_from(1).unwrap());pub fn into_status(&self) -> ExitStatus
Converts an ExitStatusError (back) to an ExitStatus.
Trait Implementations
impl Clone for ExitStatusError
fn clone(&self) -> ExitStatusError
Returns a copy of the value. Read more
fn clone_from(&mut self, source: &Self)
Performs copy-assignment from source. Read more
impl Debug for ExitStatusError
fn fmt(&self, f: &mut Formatter<'_>) -> Result
Formats the value using the given formatter. Read more
impl Display for ExitStatusError
fn fmt(&self, f: &mut Formatter<'_>) -> Result
Formats the value using the given formatter. Read more
impl Error for ExitStatusError
fn source(&self) -> Option<&(dyn Error + 'static)>
The lower-level source of this error, if any. Read more
fn backtrace(&self) -> Option<&Backtrace>
Returns a stack backtrace, if available, of where this error occurred. Read more
fn description(&self) -> &str
use the Display impl or to_string()
fn cause(&self) -> Option<&dyn Error>
replaced by Error::source, which can support downcasting
fn from_raw(raw: i32) -> Self
Creates a new ExitStatus or ExitStatusError from the raw underlying integer status value from wait Read more
fn signal(&self) -> Option<i32>
If the process was terminated by a signal, returns that signal. Read more
fn core_dumped(&self) -> bool
If the process was terminated by a signal, says whether it dumped core.
fn stopped_signal(&self) -> Option<i32>
If the process was stopped by a signal, returns that signal. Read more
fn continued(&self) -> bool
Whether the process was continued from a stopped status. Read more
fn into_raw(self) -> i32
Returns the underlying raw wait status. Read more
impl Into<ExitStatus> for ExitStatusError
fn into(self) -> ExitStatus
Performs the conversion.
impl PartialEq<ExitStatusError> for ExitStatusError
fn eq(&self, other: &ExitStatusError) -> bool
This method tests for self and other values to be equal, and is used by ==. Read more
fn ne(&self, other: &ExitStatusError) -> bool
This method tests for !=.
impl Copy for ExitStatusError
impl Eq for ExitStatusError
impl StructuralEq for ExitStatusError
impl StructuralPartialEq for ExitStatusError
Auto Trait Implementations
impl RefUnwindSafe for ExitStatusError
impl Send for ExitStatusError
impl Sync for ExitStatusError
impl Unpin for ExitStatusError
impl UnwindSafe for ExitStatusError
Blanket Implementations
impl<T> From<T> for T
pub fn from(t: T) -> T
Performs the conversion.
pub fn into(self) -> U
Performs the conversion.
type Owned = T
The resulting type after obtaining ownership.
pub fn to_owned(&self) -> T
Creates owned data from borrowed data, usually by cloning. Read more
pub fn clone_into(&self, target: &mut T)
toowned_clone_into #41263)recently added
Uses borrowed data to replace owned data, usually by cloning. Read more
type Error = Infallible
The type returned in the event of a conversion error.
pub fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
Performs the conversion.
type Error = <U as TryFrom<T>>::Error
The type returned in the event of a conversion error.
pub fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>
Performs the conversion.
© 2010 The Rust Project Developers
Licensed under the Apache License, Version 2.0 or the MIT license, at your option.
https://doc.rust-lang.org/std/process/struct.ExitStatusError.html