     /*
        <vms_fab>

        This macro sets up the file access block and name block for VMS.
        It also does the initial parsing of the input string (resolving 
        wildcards,
        if any) and finds all files matching the input pattern.
        The address of the first matching pattern is returned.

        Written by Phillip C. Brisco 8/98.
      */
#include "vms_fab.h"

void
vms_fab (argp, argvp)
	int * argp;
	char **argvp[];
{
  extern int optind;
  int optout;

  fab = cc$rms_fab;
  nam = cc$rms_nam;

  optout = 0;
  strcpy (fna_buffer, *argvp[optind]);
  length_of_fna_buffer = NAM$C_MAXRSS;

  fab.fab$b_bid = FAB$C_BID;
  fab.fab$b_bln = FAB$C_BLN;
  fab.fab$l_fop = FAB$M_NAM;
  fab.fab$l_nam = &nam;
  fab.fab$l_fna = &fna_buffer;
  fab.fab$b_fns = length_of_fna_buffer;

  nam.nam$b_bid = NAM$C_BID;
  nam.nam$b_bln = NAM$C_BLN;
  nam.nam$l_esa = &expanded_name;
  nam.nam$b_ess = NAM$C_MAXRSS;
  nam.nam$l_rsa = &result_name;
  nam.nam$b_rss = NAM$C_MAXRSS;

  fab_stat = sys$parse (&fab);
  fab_stat = sys$search (&fab);

  if (fab_stat != 65537)
    {
      fprintf (stderr, "No Matches found.\n");
      exit (0);
    }

  /*
     While we find matching patterns, continue searching for more.
   */
  while (fab_stat == 65537)
    {
      /*
         Allocate memory for the filename
       */
      arr_ptr[optout] = alloca (max_file_path_size + 1);

      strcpy (arr_ptr[optout], result_name);

      /*
         If we don't tack on a null character at the end of the 
         filename,
         we can get partial data which is still there from the last
         sys$search command.
       */
      arr_ptr[optout][nam.nam$b_dev +
		      nam.nam$b_dir +
		      nam.nam$b_name +
		      nam.nam$b_type +
		      nam.nam$b_ver] = '\0';

      fab_stat = sys$search (&fab);
      optout++;
    }

  optout--;

  /* Return a pointer to the beginning of memory that has the expanded
     filenames.
   */
  *argcp = optout;
  *argvp = arr_ptr;

}
