Method waitForSignals

command.go:114–153

Wait for either host or DBus signals

(dbusSignals chan *dbus.Signal)

// Wait for either host or DBus signals
func (c *Command) waitForSignals(dbusSignals chan *dbus.Signal) (int, error) {
	hostSignals := make(chan os.Signal, 1)
	signal.Notify(hostSignals)

	for {
		select {
		case signal := <-hostSignals:
			unixSignal := signal.(syscall.Signal)

			if unixSignal == unix.SIGWINCH && c.pty != nil {
				c.pty.inheritWindowSize()
				break
			} else if unixSignal == unix.SIGURG {
				// Ignore runtime-generated SIGURG messages
				// See https://github.com/golang/go/issues/37942
				break
			}

			// Send the signal but ignore any error, as there is
			// nothing much we can do about them
			_ = c.signal(unixSignal)

		case message := <-dbusSignals:
			// Wait for HostCommandExited message
			if message.Name != "org.freedesktop.Flatpak.Development.HostCommandExited" {
				continue
			}

			waitStatus := message.Body[1].(uint32)
			status, exited := interpretWaitStatus(waitStatus)
			if exited {
				return status, nil
			} else {
				return status, errors.New("child process did not terminate cleanly")
			}
		}
	}

	// unreachable
}