[Sugar-devel] Permission problems and acessing usb dispositive

[Alberto Arruda de Oliveira]

Hello again,

First of all, I'd like to thank everyone that helped me on my other thread,
about adapting a software to run as an activity on XO. Thanks to you all, I
was able to do it.

But now, I'm facing another problem regarding the permissions olpc user has
to access diferent dispositives on XO. The software I adapted uses the USB
port to communicate with an external module, to which it will send a
compiled code. It's an graphical programming tool, with the purpose of
robotics teaching. The problem is, since OLPC user doesn't have enough
permissions to access the ports, we can't send the compiled code to the
external module, unless we manually change the permissions to do so. So, my
question is, is there any way to do it without having to do it manually for
every machine we install or activity in ?

Just in case, the device our activity is trying to access is

/dev/ttyACM0

Using ls -l /dev/ttyACM0 we see that the its access permission is uucp while
the group of our activity is olpc.

Using chmod o=rw /dev/ttyACM0 solves the problem.

Thanks again
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