oursh 0.4.4

Modern, fast POSIX compatible shell
Documentation 
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use std::ffi::CString;
use nix::{
    unistd::Pid,
    sys::wait::WaitStatus,
};
use crate::{
    program::posix::builtin::Builtin,
    program::{Result, Runtime},
};

/// Noop builtin, same idea as `true`.
pub struct Return(pub i32);

impl Builtin for Return {
    fn run(self, _: Vec<CString>, _: &mut Runtime) -> Result<WaitStatus> {
        Ok(WaitStatus::Exited(Pid::this(), self.0))
    }
}