        function makeCb(psrc, pdst, chunk) {
          return (err, nb, data) => {
            onread(err, nb, data, pdst, psrc, chunk);
          };
        }
The software constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.