Re: [uml-user] Shutdown question

[Jeff Dike <jdike@ka...>]

john.burton@... said:
> Is it sufficient to put something like "uml_mcontrol uml_name halt"
> into my /etc/conf.d/local.stop file or do I need to do something else
> to ensure a smooth shutdown?

That's OK, but it's not as clean as you might think.  Adding a
	uml_mconsole uml_name sysrq s
beforehand will give you clean filesystems by syncing stuff out.

Even then, the processes inside UML won't be shut down cleanly.  For that,
I think you need to run something inside the UML which does a halt or
something equivalent.

				Jeff

[uml-user] Shutdown question

[John Burton <john.burton@jb...>]

I have a host system which starts a uml system when it starts up from
/etc/conf.d/local.start

I want to make sure that when the host system shuts down it stops the uml
properly too.
Is it sufficient to put something like "uml_mcontrol uml_name halt" into my
/etc/conf.d/local.stop file or do I need to do something else to ensure a
smooth shutdown?

Re: [uml-user] Shutdown question

[Jeff Dike <jdike@ka...>]

john.burton@... said:
> Is it sufficient to put something like "uml_mcontrol uml_name halt"
> into my /etc/conf.d/local.stop file or do I need to do something else
> to ensure a smooth shutdown?

That's OK, but it's not as clean as you might think.  Adding a
	uml_mconsole uml_name sysrq s
beforehand will give you clean filesystems by syncing stuff out.

Even then, the processes inside UML won't be shut down cleanly.  For that,
I think you need to run something inside the UML which does a halt or
something equivalent.

				Jeff

Re: [uml-user] Shutdown question

[Martin Maney <uml-list-sub@tw...>]

On Wed, May 21, 2003 at 10:16:13PM -0400, Jeff Dike wrote:
> That's OK, but it's not as clean as you might think.  Adding a
> 	uml_mconsole uml_name sysrq s
> beforehand will give you clean filesystems by syncing stuff out.
> 
> Even then, the processes inside UML won't be shut down cleanly.  For that,
> I think you need to run something inside the UML which does a halt or
> something equivalent.

uml_mconsole's 'cad' command works very nicely provided you've changed
the inittab entry to -h instead of the usual -r.  I've been doing that
to machines for years - guess it's still an uncommon idea.  :-)

-- 
Microsoft, which used to say all the time that the software business
was ruthlessly competitive, is now matched against a competitor whose
model of production and distribution is so much better that Microsoft
stands no chance of prevailing in the long run. They're simply trying
to scare people out of dealing with a competitor they can't buy,
can't intimidate and can't stop. -- Eben Moglen

Re: [uml-user] Shutdown question

[Bill Duncan <bduncan-uml@be...>]

Jeff Dike said:
> john.burton@... said:
>> Is it sufficient to put something like "uml_mcontrol uml_name halt" into my
>> /etc/conf.d/local.stop file or do I need to do something else to ensure a smooth shutdown?
>
> That's OK, but it's not as clean as you might think.  Adding a
> 	uml_mconsole uml_name sysrq s
> beforehand will give you clean filesystems by syncing stuff out.
>
> Even then, the processes inside UML won't be shut down cleanly.  For that, I think you need
> to run something inside the UML which does a halt or something equivalent.

Change the ctrlaltdel entry in /etc/inittab to do a shutdown rather than reboot.
Usually just change the "-r" to an "-h".  Then you can use uml_mconsole with
the "cad" option to shut down all the processes properly (presumably, as long
as they are properly set up to do that).


-- 
Bill Duncan, VE3IED - BeachNet  -->  http://www.beachnet.org
bduncan@...

Re: [uml-user] Shutdown question

[Nick Craig-Wood <ncw1@ax...>]

On Wed, May 21, 2003 at 10:16:13PM -0400, Jeff Dike wrote:
> john.burton@... said:
> > Is it sufficient to put something like "uml_mcontrol uml_name halt"
> > into my /etc/conf.d/local.stop file or do I need to do something else
> > to ensure a smooth shutdown?
> 
> That's OK, but it's not as clean as you might think.  Adding a
> 	uml_mconsole uml_name sysrq s
> beforehand will give you clean filesystems by syncing stuff out.
> 
> Even then, the processes inside UML won't be shut down cleanly.  For that,
> I think you need to run something inside the UML which does a halt or
> something equivalent.

We use the cad (control-alt-del) signal for this so for a nice
shutdown do :-

  uml_mconsole uml_name cad

You need to put something like this in the umls /etc/inittab to make
it shutdown on cad (most distros reboot).

  # What to do when CTRL-ALT-DEL is pressed.
  ca:12345:ctrlaltdel:/sbin/shutdown -t1 -a -h now

Remember to do "init q" after editing the inittab.

-- 
Nick Craig-Wood
ncw1@...