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Re: [Nmh-workers] Pasing stdin to "inc -file" ?

From: David Levine
Subject: Re: [Nmh-workers] Pasing stdin to "inc -file" ?
Date: Mon, 18 Feb 2013 21:28:50 -0500

> >I removed that notice from the man page after 1.5 went out.
> >However, I shouldn't have.  Ken added locking to the context
> >and sequences files nearly a decade ago.  That addresses
> >file mangling during write, but not possible interaction with
> >other nmh processes.
> I did?  When I went back and looked it really looked like that was
> Richard Coleman.

Maybe, I found 82a21b6f3c but it's just the merge.

> But nevertheless ... what interactions are there with
> other nmh processes?  Are we talking about possible message overwrites?

No, just this:

> (I can maybe believe that there might be a race condition somewhere with
> some of the new messages not making it on the unseen sequence).

The entire read/update/write progression of the sequences
file isn't protected.  So if multiple processes do that
concurrently, only one can win the race.


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