thanks chris,

On 15 January 2011 21:09, Chris Stratton <cs07...@gmail.com> wrote:

> I think you mean not possible to chmod the file on a phone which is
> not rooted.
>
> And the answer is that you cannot solve this problem on a secured
> device.
>
> Nor can you load custom kernel drivers on a secured device to begin
> with.
>
> If you are building this into a release which user's won't have root
> within, you could change the bits in the permissions field that
> accompanies the name field in the attribute structure used to create
> the sysfs "file"  - see Documentation/filesystems/sysfs.txt
>
> Unfortunately, this method won't let you use android-style permissions
> to control access.  To do that, you'd have to be able to assign the
> group ID of the sysfs entry to a hard coded linux group matching an
> android group that is assigned to applications with the appropriate
> permission.
>
> On Jan 11, 10:21 pm, ajay <mna...@gmail.com> wrote:
> > hi,
> >
> >    I have written a pseudo  driver which creates a file(sample) in sys/
> > class/sampledriver in the phone.when i try to open the file i get an
> > error no 13.
> >
> > but i have observed that we can remove this error by chmod 777 sys/
> > class/sampledriver/sample
> >
> > but this type of hack is not possible on a phone which is rooted.
> >
> > pls reply how to solve this issue.
> >
> > Thanks and regards,
> > Ajay
>
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-- 
ajay

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