pub struct ExitStatusError(_);
🔬This is a nightly-only experimental API. (exit_status_error #84908)
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();
Run

Implementations

🔬This is a nightly-only experimental API. (exit_status_error #84908)

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));
Run
🔬This is a nightly-only experimental API. (exit_status_error #84908)

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 it 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());
Run
🔬This is a nightly-only experimental API. (exit_status_error #84908)

Converts an ExitStatusError (back) to an ExitStatus.

Trait Implementations

Returns a copy of the value. Read more
Performs copy-assignment from source. Read more
Formats the value using the given formatter. Read more
Formats the value using the given formatter. Read more
The lower-level source of this error, if any. Read more
👎Deprecated since 1.42.0: use the Display impl or to_string()
👎Deprecated since 1.33.0: replaced by Error::source, which can support downcasting
🔬This is a nightly-only experimental API. (error_generic_member_access #99301)
Provides type based access to context intended for error reports. Read more
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
Whether the process was continued from a stopped status. Read more
Returns the underlying raw wait status. Read more
Converts this type into the (usually inferred) input type.
This method tests for self and other values to be equal, and is used by ==. Read more
This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason. Read more

Auto Trait Implementations

Blanket Implementations

Gets the TypeId of self. Read more
Immutably borrows from an owned value. Read more
Mutably borrows from an owned value. Read more

Returns the argument unchanged.

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

🔬This is a nightly-only experimental API. (provide_any #96024)
Data providers should implement this method to provide all values they are able to provide by using demand. Read more
The resulting type after obtaining ownership.
Creates owned data from borrowed data, usually by cloning. Read more
Uses borrowed data to replace owned data, usually by cloning. Read more
Converts the given value to a String. Read more
The type returned in the event of a conversion error.
Performs the conversion.
The type returned in the event of a conversion error.
Performs the conversion.