Function syncParentHooks

libcontainer/init_linux.go:434–441

syncParentHooks sends to the given pipe a JSON payload which indicates that the parent should execute pre-start hooks. It then waits for the parent to indicate that it is cleared to resume.

(pipe *syncSocket)

// the parent should execute pre-start hooks. It then waits for the parent to
// indicate that it is cleared to resume.
func syncParentHooks(pipe *syncSocket) error {
	// Tell parent.
	if err := writeSync(pipe, procHooks); err != nil {
		return err
	}
	// Wait for parent to give the all-clear.
	return readSync(pipe, procHooksDone)
}

// syncParentSeccomp sends the fd associated with the seccomp file descriptor
// to the parent, and wait for the parent to do pidfd_getfd() to grab a copy.