The issue is that Perl's internal representation of a file
is 32-bit. So when Perl tries to seek
to a particular
location of a very large file, well Perl doesn't understand
what position 5_003_904_123 is.
There are two solutions. One is to compile a new version
of Perl that does understand how to handle large
files. The other is to keep Perl from trying to seek. The
easiest way to do the other is for Perl to read from a pipe,
not a filehandle. That can be done by writing your script
so that it reads from STDIN, or by converting your opens
so that they look kind of like this:
open(FILE, "cat $file |") or die "Cannot cat '$file': $!";
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