**runcmd for system calls**




Returns a reference to a hash

  $returnthings{"signal"} = $signal;
  $returnthings{"success"} = $rc;
  $returnthings{"exitcode"} = $rc;
  $returnthings{"stdout"} = \@outlines;
  $returnthings{"stderr"} = \@errlines;
  $returnthings{"expectation"} = $expected;