Re: TestSupport.pm: introduce create_empty_iso

Re: TestSupport.pm: introduce create_empty_iso

[Wei Liu]

You forgot to CC xen-devel. I've added it back for the benifit of other
people.

On Fri, Mar 21, 2014 at 11:26:10PM +0100, Thomas Schmitt wrote:
> Hi,
> 
> i read in
>   http://lists.xen.org/archives/html/xen-devel/2014-03/msg02873.html
> 
> > [Xen-devel] [PATCH V4 06/12] TestSupport.pm: introduce create_empty_iso
> > diff --git a/Osstest/TestSupport.pm b/Osstest/TestSupport.pm
> > index df6c4c1..a4a738f 100644
> > + # Unfortunately xorriso refuses to create an ISO if the input
> > + # directory is empty.
> 
> It is possible by
> 
>    xorriso -as mkisofs -o /tmp/my.iso [more mkisofs options] \
>            -- -changes_pending yes
> 
> The argument "--" ends the range of -as mkisofs.
> The xorriso command -changes_pending "yes" forces image production
> even if no files have been added.
> 

Thanks for the tip. It's much better than my workaround! I will
incorporate this into my patch. (not this one, but the other one that
invokes xorriso)

> 
> I am curious for what purpose you need an empty ISO filesystem.
> 

In this kind of testcases, we generate an ISO to auto-install a guest.
After the installation, the guest reboots. We replace the ISO in config
file with an empyt ISO to prevent reinstalling the guest.

> 
> Have a nice day :)
> 

You too. :-)

Wei.

> Thomas

Re: TestSupport.pm: introduce create_empty_iso

[Thomas Schmitt]

Hi,

Wei Liu wrote:
> You forgot to CC xen-devel. I've added it back for the benifit of other
> people.

I was not sure whether it is appropriate to discuss the usage
of xorriso on xen-devel.


> We replace the ISO in config
> file with an empyt ISO to prevent reinstalling the guest.

In any kind of language there is a use case for no-op.


If you have questions or proposals about xorriso, don't hesitate
to contact me in private or at bug-xorriso@gnu.org.


Have a nice day :)

Thomas

Re: TestSupport.pm: introduce create_empty_iso

[Wei Liu]

On Sat, Mar 22, 2014 at 06:41:15PM +0100, Thomas Schmitt wrote:
> Hi,
> 
> Wei Liu wrote:
> > You forgot to CC xen-devel. I've added it back for the benifit of other
> > people.
> 
> I was not sure whether it is appropriate to discuss the usage
> of xorriso on xen-devel.
> 

It's about making a patch better so it's definitely appropriate.
I've incorporated your suggestion into my patches. Thanks!

> 
> > We replace the ISO in config
> > file with an empyt ISO to prevent reinstalling the guest.
> 
> In any kind of language there is a use case for no-op.
> 
> 
> If you have questions or proposals about xorriso, don't hesitate
> to contact me in private or at bug-xorriso@gnu.org.
> 

Sure. Kinda surprise xorriso developers also subscribe to Xen-devel. :-)

Wei.

> 
> Have a nice day :)
> 
> Thomas

Re: TestSupport.pm: introduce create_empty_iso

[Thomas Schmitt]

Hi,

> Kinda surprise xorriso developers also subscribe to Xen-devel. :-)

I'm not subscribed. Google found your patches yesterday
when i did a "Past 24 hours" search for "xorriso".
Fishing the web for bug indications.

My meeting points with Xen would be production of bootable ISOs
and SCSI command passthrough for operating real CD/DVD/BD burners
of the host from a Xen guest.

Up to now, no libburn user reported problems with the latter.
Question is whether anybody tried yet.


Have a nice day :)

Thomas