🚀 go-pugleaf

well, with the help of several people from this group, I now have a
neat little registration program that does, in fact, directly modify
the executable.  it looks for a certain string, and if it doesn't
find it, it complains about the exe either having been tampered with
or compressed.  if it does find it, it gets the user's registration
key, their name, Amateur Radio callsign, etc., and inserts them into
the executable.

THANKS TO ALL WHO HELPED OUT.

I finally ended up with a simple process where the filesize is determined,
a buffer large enough to hold the file is malloc'ed (in smaller chunks to
avoid one block of data > 64k...geez, you'd think the people writing C
compilers could handle that in the background and make a more correctly
behaved C compiler).

by the way, never did get turbo c++ to report the correct file size using
their filelength() function....it refused to do anything past the first
EOF.  I did get the correct file size, though, thanks to one person who
said to fseek to the end of the file, ftell, and then fseek back to the
start.

and just to make things more interesting, I even setup a program to modify
the registration program.....  only this one, *I* use (it inserts a serial
number for the user).  naturally, this program simply took the code for
the other one and changed a few bits here and there.

neat stuff!

thanks again,
   --jim

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