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[Jamie Strandboge]

On 11/01/2015 01:08 PM, Gábor Paller wrote:
> My snap now runs unconfined and I would like to make it confined. I am sitting
> on top of a huge software stack (entire OpenCV and its dependencies) and access
> problems start to come up.
> 
> First question: I need to grant access to a privileged file.
> IOError: [Errno 13] Permission denied: '/etc/matplotlibrc'
> 
> How do I do this?
> 
This file does not exist on an Ubuntu Core system-- guessing you are perhaps
trying to write to it? If so, / is mounted read-only and so (most of) /etc is
not available for writing (see the developer docs[1] for details). You should
instead ship this file as part of your snap and adjust your application to use
it instead of /etc/matplotlibrc.

[1]https://developer.ubuntu.com/en/snappy/guides/filesystem-layout/

> Regards,
> Gabor
> 
> On Fri, Oct 30, 2015 at 8:17 PM, Jamie Strandboge <jamie at canonical.com
> <mailto:jamie at canonical.com>> wrote:
> 
>     On 10/30/2015 02:08 PM, Gábor Paller wrote:
>     > "On 15.04 you have two options, either use hw-assign (which is aimed at
>     > developers) or use oem assign"
>     >
>     > So is that "hw-assign" necessary after every installation? I suspect it is as
>     > the access to the ttyO1 device is not present in the apparmor file so whenever
>     > the package is reinstalled, the permission has to be granted again. Am I right?
>     >
>     I answered this in a followup email: "When using hw-assign, you will need to run
>     hw-assign after the first install of the snap on a device. You do not have to
>     run it again after upgrading the snap that the device has been assigned to."
> 
>     > Also, what is the "caps" in the package.yaml that gives me access to the /dev/ttyO1?
>     >
>     caps is not used to grant access to devices.
> 
>     --
>     Jamie Strandboge                 http://www.ubuntu.com/
> 
> 
> 
> 


-- 
Jamie Strandboge                 http://www.ubuntu.com/

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