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Re: Workaround for hostid on Darwin 8/MacPPC

From: C. Speare
Subject: Re: Workaround for hostid on Darwin 8/MacPPC
Date: Fri, 4 May 2007 23:01:40 -0400 (EDT)

Ok, a (hopefully) better idea.

If the value of id is 0, don't return anything and exit with EXIT_FAILURE.
That maintains consistency and makes the user aware that something is seriously broken. [By the same view, returning a well-known value, like 0xdeadbeef or similar, could serve the same purpose; it seems more cautious to not return anything, though.]

For my purposes, it is enough that I can set the hostid via a sysctl, and hostid will function just fine:

ppc7447% hostid
ppc7447% sudo sysctl -w kern.hostid=0xcafe0def
kern.hostid: 0 -> 3405647343
ppc7447% hostid
ppc7447% hostid --version
hostid (GNU coreutils) 6.9

So, I can get around a broken hostid - the responsbility of coming up with a consistent [and hopefully unique] hostid is now on the administrator [or OS vendor].

On Thu, 3 May 2007, John Cowan wrote:

C. Speare scripsit:

A possible (but weak)  workaround is to test for the case where id is 0.

It's fine to detect that case, but the whole idea of hostid is to
return the same value each time it's called on the same host,
so returning a random value is unhelpful.

Work hard,                                      John Cowan
play hard,                                      address@hidden
die young,                                      http://www.ccil.org/~cowan
rot quickly.

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