Method Wait

cmd/run/engine/process/process.go:216–243

Wait waits for the process to exit and cleans up resources in the end.

()

// Wait waits for the process to exit and cleans up resources in the end.
func (p *Process) Wait() error {
	for {
		// We use a poll on the pidfd because the usual wait4(2) way doesn't let us
		// wait on non-children processes (see https://stackoverflow.com/a/1157739).
		exited, err := p.poll()
		if err != nil {
			if errors.Is(err, unix.EBADF) {
				select {
				case <-p.Exited:
					return nil
				default:
				}
			}
			return fmt.Errorf("poll: %w", err)
		}
		if exited {
			break
		}
	}

	if p.markAsExited() {
		// If a process exits with exit(2) or exit_group(2), handleExit is
		// responsible for the cleanup. We call cleanup only for processes that
		// do not exit cleanly (ex: SIGTERM, SIGKILL).
		go p.cleanup()
	}
	return nil
}

// markAsExited marks the process as exited. If the process has already been
// marked as exited by someone else, it returns false, otherwise true.