Returns an error if a nonzero exit status was received.

If theCommand exited successfully,self is returned.

This is equivalent to callingexit_okonOutput.status.

Note that this will throw away theOutput::stderr field in the error case.If the child process outputs useful informantion to stderr, you can:

• Usecmd.stderr(Stdio::inherit()) to forward thestderr child process to the parent’s stderr,usually printing it to console where the user can see it.This is usually correct for command-line applications.
• Capturestderr using a custom error type.This is usually correct for libraries.

§Examples

#![feature(exit_status_error)]usestd::process::Command;assert!(Command::new("false").output().unwrap().exit_ok().is_err());

Returns the argument unchanged.

CallsU::from(self).

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