How can I write EOF into a file?
I tryed to do as follows:

size=sizeof(EOF);
end_of_file=EOF;

write(fdMutexRichieste, &end_of_file, size);

But it does non work correctly,
becouse in the next cicle (using lseek(..., SEEK_END) of my code it seems to ignore my EOF and use the LAST (and ORIGINAL) EOF.