Date: Thu, 30 Sep 2010 09:03:33 +0200 From: Ed Schouten <ed@80386.nl> To: Jeremy Chadwick <freebsd@jdc.parodius.com> Cc: freebsd-stable@freebsd.org, ale@FreeBSD.org Subject: Re: mysqld_safe holding open a pty/tty on FreeBSD (7.x and 8.x) Message-ID: <20100930070333.GU87427@hoeg.nl> In-Reply-To: <20100930065151.GA9634@icarus.home.lan> References: <20100930065151.GA9634@icarus.home.lan>
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--QxSStYAgvEtE+iQJ Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Hi Jeremy, * Jeremy Chadwick <freebsd@jdc.parodius.com> wrote: > 1) "mysqld_safe > /dev/null 2>&1 &" never released the tty > 2) "nohup mysqld_safe > /dev/null 2>&1 &" did release the tty What happens if you run the following command? daemon -cf mysqld_safe The point is that FreeBSD's pts(4) driver only deallocates TTYs when it's really sure nothing uses it anymore. Even if there is not a single file descriptor referring to the slave device, it has to wait until there exist no processes which have the TTY as its controlling TTY. The `pstat -t' command is quite useful to figure out whether there is still a session associated with the TTY. See the following thread: http://lists.freebsd.org/pipermail/freebsd-ports/2010-July/062417.html --=20 Ed Schouten <ed@80386.nl> WWW: http://80386.nl/ --QxSStYAgvEtE+iQJ Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.16 (FreeBSD) iEYEARECAAYFAkykNkUACgkQ52SDGA2eCwUNZQCfe9pqbfGllCbI8eBnrUUeMNb5 ebQAnitV3htvjRs9sEzipAVR6viULUQl =bmVt -----END PGP SIGNATURE----- --QxSStYAgvEtE+iQJ--
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