fix linuz

Author: MikailBag

src/linux.rs

@@ -58,7 +58,7 @@ impl ChildProcess for LinuxChildProcess {
     type PipeIn = LinuxWritePipe;
     type PipeOut = LinuxReadPipe;
     fn get_exit_code(&self) -> Result<Option<i64>, Error> {
-        self.poll()?;
+        self.wait_for_exit(Duration::from_millis(1))?;
         let ec = self.exit_code.load(Ordering::SeqCst);
         let ec = match ec {
             EXIT_CODE_STILL_RUNNING => None,
@@ -93,7 +93,7 @@ impl ChildProcess for LinuxChildProcess {
         }
     }
 
-    fn is_finished(&self) -> Result<bool, Error> {
+    fn is_finished(&self) -> bool {
         Ok(self.exit_code.load(Ordering::SeqCst) != EXIT_CODE_STILL_RUNNING)
     }
 }