          dst.fchmod(dstHandle, mode, function tryAgain(err) {
            if (err) {
              // Try chmod() for sftp servers that may not support fchmod()
              // for whatever reason
              dst.chmod(dstPath, mode, (err_) => tryAgain());
              return;
            }
            startReads();
          });
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.