text: // Copyright (C)2008-2012 Laurence Tratt http://tratt.net/laurie/
  //
  // Permission is hereby granted, free of charge, to any person obtaining a copy
  // of this software and associated documentation files (the "Software"), to
  // deal in the Software without restriction, including without limitation the
  // rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
  // sell copies of the Software, and to permit persons to whom the Software is
  // furnished to do so, subject to the following conditions:
  //
  // The above copyright notice and this permission notice shall be included in
  // all copies or substantial portions of the Software.
  //
  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  // IN THE SOFTWARE.
  
  
  enum Format_Style {FORMAT_UNKNOWN, FORMAT_LIKE_TIME, FORMAT_NORMAL, FORMAT_RUSAGE};
  
  typedef struct {
      char ** argv;
      const char *pre_cmd;
      const char *input_cmd;
      const char *output_cmd;
      const char *replace_str;
      bool quiet_stdout;         // True = suppress command's stdout.
      bool quiet_stderr;         // True = suppress command's stderr.
      struct timeval **timevals; // The wall clock time for each command run.
      struct rusage **rusages;   // The rusage each command run.
  } Cmd;
  
  typedef struct {
      Cmd **cmds;
      int num_cmds;               // How many commands the user has specified.
      int num_runs;               // How many times to run each command.
      int conf_level;             // Confidence level (as a percentage, e.g. 95).
  
      enum Format_Style format_style;
      int sleep;                  // Time to sleep between commands, in seconds.
                                  // 0 = no sleep.
      int verbosity;              // 0 to +ve: higher values may increase
                                  // verbosity.
  } Conf;
  