How to identify a "raw" zone file

[WBrown at e1b.org]

Evan wrote on 12/01/2011 05:44:02 PM:

> > I've looked at a few of them, and I noticed that all the ones I've 
seen
> > start with the four-octet string "00 00 00 02".  Is that sufficient?
> 
> I'd recommend checking the next four octets as well; they'll be "00 00 
00 00"
> or "00 00 00 01".  The first of those is the format that's always been 
used
> up to now; the second is the format that will be used in 9.9.0, starting
> with the next beta.

Wouldn't a text format zone file start with either printable or whitespace 
characters? Checking for file format version may be useful for some 
situations, but for simple text/raw determination is overkill.  Coding a 
test that includes a version could fail when next version is used.



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