Enum Redirection 

#[non_exhaustive]
pub enum Redirection {
    Capture,
    Inherit,
    Null,
    File(File),
}

Where a child process’s stderr (or stdout, when supported) goes.

The default for Cmd::stderr() is Capture — every error variant carries captured stderr, so that’s almost always what production code wants. Use the other variants only when you have a reason.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Capture

Capture into memory (default). Available in RunOutput.stderr on success and in error variants on failure.

Inherit

Inherit the parent’s file descriptor. Output streams to the parent’s stderr (i.e., the user’s terminal) instead of being captured. Useful when the child should prompt the user (e.g., ssh password prompts) or when the user should see live progress.

Null

Discard (/dev/null). Captured stderr will be empty.

File(File)

Redirect to a file. Captured stderr will be empty.

Trait Implementations

impl Debug for Redirection

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

Formats the value using the given formatter.

impl Default for Redirection

fn default() -> Redirection

Returns the “default value” for a type.