Why enter password so often?

Any technical questions about the Epiphany chip and Parallella HW Platform.

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Why enter password so often?

Postby Lou_Reed » Fri Jan 30, 2015 6:10 pm

After we have logged in as linaro at the beginning of a session why is it necessary
to re-enter our password once the again when running certain programs and why do we need to enter
ctrl-alt-F2 when we want to run other programs?

In my experience with Centos/Redhat you enter a password as a super user only to verify
that you are about to make a change in the Linux OS. But it seems that you do not have to do that here.

As I said in the paragraph above the only time is to run certain Parallella/epiphany programs.

As help appreciated.

Thanks in advance.

Respectfully,


Lou_Reed
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Re: Why enter password so often?

Postby 9600 » Sat Jan 31, 2015 11:03 am

Lou_Reed wrote:As I said in the paragraph above the only time is to run certain Parallella/epiphany programs.


Because /dev/mem needs to be opened and you clearly don't want normal users to be able to do this! However, if you were to build a kernel and SDK from git you would get a new device, /dev/epiphany, and an SDK that uses this to load programs. Then you can set whatever permissions you like on that device.

Regards,

Andrew
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