[ydl-gen] YDL 5.0.1 on an Xserve (sub-topic: MD5)

[Jon "NeoAmsterdam" Levy]

On May 25, 2007, at 9:04 AM, Derick Centeno wrote:
> Regarding the md5sum, I hope that everyone is aware that within OS  
> X Tiger invoking the md5sum algorithm means:
>
> $md5 filename
>
> I don't know why Apple chose to do that; you should know however,  
> that they did.
>
> A discussion regarding these changes by Apple occurred on either  
> this or the newbie list a while back.

I hope you didn't just refer to me as a "newbie" - I've been running  
YDL since 2.3 on 6360s, a G3 desktop, and a G4 TiBook.

In any event, I remember the discussion 2007-04-13 vividly.  Check  
this mailing list's archives for "[ydl-gen] [YDL5] Install DVD won't  
boot (bad media?) and related questions" and I believe you will find  
the following message (names removed to protect the guilty):

>>> Remember that what Apple has done with open source is modify nearly
>>> everything to it's taste.  Apple's pdisk for example is probably not
>>> able to see or read ext3 format which is the format used by YDL.
>>> So the
>>> above doesn't mean anything.  Apple even entirely removed md5sum  
>>> from
>>> Darwin, the open source or BSD component of OS X which is standard
>>> everywhere else (in every other Unix).
>>>
>>
>> With regards to MD5, I disagree fully.  I checked my stash of YDL 4.1
>> ISOs against Argonne's and the MD5s match.  Perhaps Apple's `md5`
>> utility has changed somewhere in the past, but I can say with
>> certainty that since 10.2.8 on forward `md5` works "as expected".
>> Please `man md5`.
>>
>
> I can also verify that Apple's md5 utility gives the identical
> MD5 checksum as Linux's md5sum (just checked on MacOS X 10.4.9).
>
> And even if it didn't, you could always get the source to md5sum
> and rebuild it on MacOS X.  But you don't need to.

	- NeoAmsterdam