rust - Kill child process while waiting for it -

i want execute process , want wait until has finished. lets spawn , wait process in thread t1:

let child = command::new("rustc").spawn().unwrap(); child.wait(); 

now, if special event occurs (which thread t0 waiting for) want kill spawned process:

if let ok(event) = special_event_notifier.recv() {     child.kill(); } 

but don't see way it: both kill , wait take mutable reference child , therefore mutually exclusive. after calling wait no 1 can have reference child anymore.

i've found wait-timeout crate, want know if there's way.

obviously, can kill process yourself. child::id method gives "os-assigned process identifier" should sufficient that.

the problem killing process platform-dependent action. on unix killing process handled kill function:

#![feature(libc)] extern crate libc; use std::env::args; use std::process::command; use std::thread::{spawn, sleep}; use std::time::duration; use libc::{kill, sigterm};  fn main() {     let mut child = command::new("/bin/sh").arg("-c").arg("sleep 1; echo foo").spawn().unwrap();     let child_id = child.id();     if args().any(|arg| arg == "--kill") {         spawn(move || {             sleep(duration::from_millis(100));             unsafe {                 kill(child_id i32, sigterm);             }         });     }     child.wait().unwrap(); } 

on windows might try openprocess , terminateprocess functions (available kernel32-sys crate).