linux-kernel - Re: Upstart 1.4 "Let them speak" released

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Message-ID: <4EE73B88.3040101@canonical.com>
Date:	Tue, 13 Dec 2011 11:48:24 +0000
From:	James Hunt <james.hunt@...onical.com>
To:	Upstart Devel List <upstart-devel@...ts.ubuntu.com>,
	linux-kernel@...r.kernel.org
Subject: Re: Upstart 1.4 "Let them speak" released

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Hi Lennart,

On 13/12/11 11:38, Lennart Poettering wrote:
> On Tue, 13.12.11 11:36, James Hunt (james.hunt@...onical.com) wrote: Just out of curiosity: how
> is rotation handled for this? If you pass the file fd directly to the spawned service you can't
> really rotate the file ever, since you cannot ask the service to reopen the file. So what do 
> you do?
The trick is we don't pass the logfile fd to the job (the jobs stdout+stderr are connected to one
end of a pty). Regarding rotation, Upstart detects if the logfile that it manages was deleted. If
so, it simply closes and reopens the corresponding file. This allows tools like logrotate to
handle rotation.

Kind regards,

James.
- --
James Hunt
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