Date: Wed, 22 Oct 2008 12:19:35 -0400 From: John Almberg <jalmberg@identry.com> To: John Almberg <jalmberg@identry.com> Cc: freebsd-questions@freebsd.org Subject: Re: mysql connection through ssl tunnel Message-ID: <65233E01-1617-4C93-91ED-394330F31AA4@identry.com> In-Reply-To: <33DD5BC0-7D57-4530-BB59-46E2D7A43F1A@identry.com> References: <8B945891-5F96-4FBF-8175-15F67F03DD92@identry.com> <48D8F881.1010000@unsane.co.uk> <912A74FB-0292-4A53-B480-34FE69D9C465@identry.com> <20081020212103.GA13334@icarus.home.lan> <007ABF71-6D85-4849-A9E7-933D18236EE8@identry.com> <48FD8876.5090805@infracaninophile.co.uk> <51D1673D-4689-4F9A-8217-CFC5C58A1145@identry.com> <33DD5BC0-7D57-4530-BB59-46E2D7A43F1A@identry.com>
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>> Now I just need to figure out how to start it on reboot, but that
>> is something I've been meaning to learn, anyway, so I don't mind.
>
> I hope you guys will bear with me just a little more... I have
> spent the day trying to figure out how to create an rc script for
> autossh. Very cool, and not as hard as I'd anticipated. It is
> attached below.
>
> The script works perfectly *iff* I run it from the command line as
> a non-root user, like so:
>
> /usr/local/etc/rc.d/autossh start
>
> However, it does NOT work when executed by root. Instead, I get the
> following error message in /var/log/messages
>
> messages:Oct 21 19:01:38 on autossh[89267]: ssh exited
> prematurely with status 255; autossh exiting
>
> So (my understanding), autossh is starting, and tries to create the
> tunnel, but the tunnel creation fails with the unhelpful 255 error
> message.
>
> But only when executed by root. That's the puzzling part.
>
> I don't allow root logins on this server, but don't see how that
> could cause this problem....
>
> I'm stumped. Any hints, much appreciated.
>
> -- John
>
> ----------------------
>
> #!/bin/sh
> # PROVIDE: autossh
> # REQUIRE: LOGIN
> # KEYWORD: shutdown
>
> . /etc/rc.subr
>
> name="autossh"
> rcvar=`set_rcvar`
> start_cmd="${name}_start"
> stop_cmd=":"
>
> load_rc_config $name
> eval "${rcvar}=\${${rcvar}:='NO'}"
>
> command="/usr/local/bin/autossh"
> command_args="-M 20000 -fNg -L 33006:127.0.0.1:3306 admin@example.com"
> #pidfile="/var/run/autossh.pid"
> #AUTOSSH_PIDFILE="$pidfile"; export AUTOSSH_PIDFILE
>
> autossh_start()
> {
> ${command} ${command_args}
> echo "started autossh"
> }
>
> run_rc_command "$1"
>
Answering my own question (probably the best way)...
I solved this problem by figuring out how to execute the command
inside the rc script as a non-root user. Like so:
autossh_start()
{
echo "${command} ${command_args}"
su admin -c "${command} ${command_args}"
echo "started autossh"
}
This works beautifully, so I almost hesitate to ask, but is there
anything wrong with this approach?
-- John
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