on *nix there is nothing extra needed (wc -c filename), whereas on Windows you could do something like:
perl -e '$/=undef(); $_ = <>; print length($_)."\n";' < filename

[download]
 er, scratch that, you don't really want to count anything after all, but just find the substring as already suggested.

-M

Free your mind

In reply to Re: text file validation by Moron
in thread text file validation by lax

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