daemon: use context error rather than inventing new one
@@ -270,7 +270,7 @@ func (d *Daemon) ContainerExecStart(ctx context.Context, name string, stdin io.R
case <-attachErr:
// TERM signal worked
}
- return fmt.Errorf("context cancelled")
+ return ctx.Err()
case err := <-attachErr:
if err != nil {
if _, ok := err.(term.EscapeError); !ok {
