Expanding a file size only descriptively

Understood.  So what is the next best thing in order to create a file without actually creating it's content?

I had created a small C language utility back when dinosaurs roamed the earth, but the original EXE doesn't work on Windows 64-bit.  It was lightening fast at allocating a large file on disk (and reserving the space) without writing real data to the file.  If you have a C compiler you can compile it.  Or if you want I'm happy to compile it here and get you  the EXE, but I didn't want to lead with that as people can be leery of EXE's from unknown sources, as they should be.

It might be possible to duplicate the approach here in Powershell using .Net System.IO.FileStream but I haven't played around with that.

#include <math.h>
#include <stdio.h>
#include <stdlib.h>
 
main(int argc, char *argv[])
{
  FILE *fp;
  long i;
  
  i = atol (argv[2]);
  i--;
 
  if (argc < 3)
  {
    printf("USAGE:  ALLOCATE filename size");
    exit(1);
  }
 
  if ((fp = fopen (argv[1], "wb")) == NULL)
    {
    perror ("Error opening output file!");
    exit (1);
    }

  if (fseek (fp, i, SEEK_SET))
    {
    perror ("Error positioning output file!");
    exit (1);
    }

  if (fputc (NULL, fp) == EOF)
    {
    perror ("Error writing to output file!");
    exit (1);
    }

  if (fclose (fp) == EOF)
    {
    perror ("Error closing output file!");
    exit (1);
    }

  exit (0);
}

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»bp

Ah yes, good point, I had found that a while ago when needing something like this, and forgotten.

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»bp

Thank you very much for your assistance.

We chose our entry since it solved the problem.