Struct servo::process::ExitStatusError[][src]

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

Tuple Fields

0: ExitStatusError
🔬 This is a nightly-only experimental API. (exit_status_error)

Implementations

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

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

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

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

🔬 This is a nightly-only experimental API. (backtrace)

Returns a stack backtrace, if available, of where this error occurred. 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

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

Performs the conversion.

This method tests for self and other values to be equal, and is used by ==. Read more

This method tests for !=.

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

Compare self to key and return true if they are equal.

Compare self to key and return true if they are equal.

Performs the conversion.

Performs the conversion.

Convert

Convert

The alignment of pointer.

The type for initializers.

Initializes a with the given initializer. Read more

Dereferences the given pointer. Read more

Mutably dereferences the given pointer. Read more

Drops the object pointed to by the given pointer. Read more

Should always be Self

The resulting type after obtaining ownership.

Creates owned data from borrowed data, usually by cloning. Read more

🔬 This is a nightly-only experimental API. (toowned_clone_into)

recently added

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.