Struct std::process::ExitStatusError
source · [−]pub struct ExitStatusError(_);Expand description
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
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));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::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());Converts an ExitStatusError (back) to an ExitStatus.
Trait Implementations
Creates a new ExitStatus or ExitStatusError from the raw underlying integer status
value from wait Read more
If the process was terminated by a signal, returns that signal. Read more
If the process was terminated by a signal, says whether it dumped core.
If the process was stopped by a signal, returns that signal. Read more
Performs the conversion.
This method tests for self and other values to be equal, and is used
by ==. Read more
This method tests for !=.