int main_opt_set(const char *name, char **dst, const char *src);

int main(int argc, char *argv[])

{

  short dologin;

  short printinfo;

  short lazy;

  char *input;

  char *output;

  char *joburi;

  char *username;

  char *password;

  char curopt;

  distren_t distren;

  distren_job_t distren_job;

  dologin = 0;

  printinfo = 0;

  lazy = 1;

  input = NULL;

  output = NULL;

  joburi = NULL;

  while(-1 != (curopt = getopt(argc, argv, "di:j:o:u:p:h")))

    {

      switch(curopt)

	{

	case ':':

	  fprintf(stderr, "-%c: is missing an argument\n", optopt);

	  return 1;

	case '?':

	  fprintf(stderr, "-%c: invalid option specified\n", optopt);

	  return 1;

	case 'h':

	  fprintf(stderr, "Usage: %s [-u <username>] [-p <password>] ...\n", argv[0]);

	  fprintf(stderr, "\t-i\tSpecifies an input file to submit to the server.\n\

\t-o\tSpecifies the name that should be given to a job retrieved from the server.\n\

\t-j\tSpecifies the job handle of a job to view information about or retrieve.\n\

\t-d\tDisplays information about the job specified with -j or uploaded by -i.\n\

\t-h\tShows this help message.\n");

	  break;

	case 'u':

	  main_opt_set("-u", &username, optarg);

	  dologin = 1;

	  break;

	case 'p':

	  main_opt_set("-p", &password, optarg);

	  dologin = 1;

	  break;

	case 'i':

	  if(joburi)

	    {

	      fprintf(stderr, "You may not specify both -i and -j; -j must refer to an existing job URL and -i will create a new job and thus retrieve its URL.\n");

	      return 1;

	    }

	  main_opt_set("-i", &input, optarg);

	  break;

	case 'o':

	  main_opt_set("-o", &output, optarg);

	  break;

	case 'j':

	  if(input)

	    {

	      fprintf(stderr, "You may not specify both -j and -i; -i is submitting a new jobs whose URL cannot be known before it is submitted\n");

	      return 1;

	    }

	  main_opt_set("-j", &joburi, optarg);

	  break;

	case 'd':

	  printinfo = 1;

	  break;

	}

    }

     // give this error after the general arguments parsing so that

     // the general help from options_init can have effect

  if(!username || !password)

    {

      fprintf(stderr, "Username and password must be specified:\n");

      if(!username)

	fprintf(stderr, "\tyou did not specify a username\n");