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Date:      Sun, 23 Jun 2002 00:47:30 -0700 (PDT)
From:      Paul Herman <pherman@frenchfries.net>
To:        "Geoffrey C. Speicher" <geoff@sea-incorporated.com>
Cc:        "Matthew D. Fuller" <fullermd@over-yonder.net>, <freebsd-stable@FreeBSD.ORG>, Matt Simerson <freebsd@blockads.com>
Subject:   Re: bug in pw, -STABLE [patch]
Message-ID:  <20020623000216.E37393-100000@mammoth.eat.frenchfries.net>
In-Reply-To: <20020622180011.V80651-100000@sea-incorporated.com>

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On Sat, 22 Jun 2002, Geoffrey C. Speicher wrote:

> DESCRIPTION
>     pid_begin() will check for existence of the pid file named
>     _path_, and if it exists, determine whether the process whose
>     pid is contained therein is still running.
>
>     [...]

That's nice and all, but you really are trying to solve the wrong
problem here.  Remember, you want to lock a particular file and not
an entire process.  (Think: concurrent pw(8)s with different -V
directories.)

Keep it simple.  Do what you mean.  If you want to make changes to
/etc/master.passwd then open(2) /etc/master.passwd with O_EXLOCK.

-Paul.


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