Struct std::process::ExitStatus

1.0.0 · source ·
pub struct ExitStatus(ExitStatus);
Expand description

Describes the result of a process after it has terminated.

This struct is used to represent the exit status or other termination of a child process. Child processes are created via the Command struct and their exit status is exposed through the status method, or the wait method of a Child process.

An ExitStatus represents every possible disposition of a process. On Unix this is the wait status. It is not simply an exit status (a value passed to exit).

For proper error reporting of failed processes, print the value of ExitStatus or ExitStatusError using their implementations of Display.

Differences from ExitCode

ExitCode is intended for terminating the currently running process, via the Termination trait, in contrast to ExitStatus, which represents the termination of a child process. These APIs are separate due to platform compatibility differences and their expected usage; it is not generally possible to exactly reproduce an ExitStatus from a child for the current process after the fact.

Tuple Fields§

§0: ExitStatus

Implementations§

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impl ExitStatus

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pub fn exit_ok(&self) -> Result<(), ExitStatusError>

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

Was termination successful? Returns a Result.

Examples
#![feature(exit_status_error)]
use std::process::Command;

let status = Command::new("ls")
                     .arg("/dev/nonexistent")
                     .status()
                     .expect("ls could not be executed");

println!("ls: {status}");
status.exit_ok().expect_err("/dev/nonexistent could be listed!");
Run
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pub fn success(&self) -> bool

Was termination successful? Signal termination is not considered a success, and success is defined as a zero exit status.

Examples
use std::process::Command;

let status = Command::new("mkdir")
                     .arg("projects")
                     .status()
                     .expect("failed to execute mkdir");

if status.success() {
    println!("'projects/' directory created");
} else {
    println!("failed to create 'projects/' directory: {status}");
}
Run
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pub fn code(&self) -> Option<i32>

Returns the exit code of the process, if any.

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. ExitStatusExt is an extension trait for extracting any such signal, and other details, from the ExitStatus.

Examples
use std::process::Command;

let status = Command::new("mkdir")
                     .arg("projects")
                     .status()
                     .expect("failed to execute mkdir");

match status.code() {
    Some(code) => println!("Exited with status code: {code}"),
    None       => println!("Process terminated by signal")
}
Run

Trait Implementations§

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impl Clone for ExitStatus

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fn clone(&self) -> ExitStatus

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for ExitStatus

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl Display for ExitStatus

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl Eq for ExitStatus

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impl ExitStatusExt for ExitStatus

Available on Unix only.
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fn from_raw(raw: i32) -> Self

Creates a new ExitStatus or ExitStatusError from the raw underlying integer status value from wait Read more
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fn signal(&self) -> Option<i32>

If the process was terminated by a signal, returns that signal. Read more
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fn core_dumped(&self) -> bool

If the process was terminated by a signal, says whether it dumped core.
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fn stopped_signal(&self) -> Option<i32>

If the process was stopped by a signal, returns that signal. Read more
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fn continued(&self) -> bool

Whether the process was continued from a stopped status. Read more
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fn into_raw(self) -> i32

Returns the underlying raw wait status. Read more
1.12.0 · source§

impl ExitStatusExt for ExitStatus

Available on Windows only.
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fn from_raw(raw: u32) -> Self

Creates a new ExitStatus from the raw underlying u32 return value of a process.
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impl Into<ExitStatus> for ExitStatusError

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fn into(self) -> ExitStatus

Converts this type into the (usually inferred) input type.
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impl PartialEq<ExitStatus> for ExitStatus

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fn eq(&self, other: &ExitStatus) -> bool

This method tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl Copy for ExitStatus

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impl Sealed for ExitStatus

Allows extension traits within std.

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impl StructuralEq for ExitStatus

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impl StructuralPartialEq for ExitStatus

Auto Trait Implementations§

Blanket Implementations§

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impl<T> Any for Twhere T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for Twhere T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for Twhere T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<Q, K> Equivalent<K> for Qwhere Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

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fn equivalent(&self, key: &K) -> bool

Checks if this value is equivalent to the given key. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for Twhere U: From<T>,

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fn into(self) -> U

Calls U::from(self).

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

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impl<T> ToOwned for Twhere T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T> ToString for Twhere T: Display + ?Sized,

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default fn to_string(&self) -> String

Converts the given value to a String. Read more
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impl<T, U> TryFrom<U> for Twhere U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for Twhere U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.