A file descriptor is just a number local to your program, in effect enumerating your open files. Well known file descriptors are 0 (usually pointing to STDIN), 1 (STDOUT) and 2 (STDERR)

I don't see any advantage in this case, but I'm no expert on this. Maybe it was a miscomunication and he just meant to use $fd filehandles instead of FD filehandles!?

In reply to Re^3: Difference between File Handles and File Descriptors in function parameters. by jethro
in thread Difference between File Handles and File Descriptors in function parameters. by tusty

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