Date: Thu, 2 May 2002 14:30:28 -0400 (EDT) From: "Geoffrey C. Speicher" <geoff@speicher.org> To: Stephen Hovey <shovey@buffnet.net> Cc: freebsd-questions@FreeBSD.ORG Subject: Re: concurrent pw(8) corrupts master.passwd sometimes? Message-ID: <Pine.BSF.4.05.10205021357360.41967-100000@speicher.org> In-Reply-To: <Pine.BSF.4.05.10205021346530.20049-100000@buffnet11.buffnet.net>
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On Thu, 2 May 2002, Stephen Hovey wrote:
> I had trouble like this with the YP stuff - if two people changed their
> passwords or something at the same time, etc.
>
> I put my own locking in so that if something is in process it doesnt even
> try to run.
How much code do pw and the YP utils use in common?
This is an excerpt from the BUGS section of pw(8):
There are the obvious races with multiple people running pwd_mkdb on dif-
ferent password files at the same time. The front-ends to pwd_mkdb,
chpass(1), passwd(1) and vipw(8), handle the locking necessary to avoid
this problem.
Isn't pw(8) conspicuously missing from that list?
> if it were me - I would change the method to create a file of pw commands,
> that a cronjob checks for an executes evern so many minutes IF a lockfile
> doesnt exit (so worst case it takes an extra 5 minutes before an account
> is created).
Good idea. It may come to that if I can't fix it the right way.
Geoff
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