> Redhat 6.0 defaults "600" permissions on sg devices. Therefore
> without read permissions, normal users cannot open sg devices.
> One of the first questions I asked to a Linux newsgroup was
> why a logical read operation such as scanning a document needed
> write permissions. From memory the answer was something like
> that that is just the way things are. Should it be?
You're writing to the device when you give the scanner instructions
(like `start the scan'). I guess it might be feasible to only read
from the device if you could operate the scanner using front panel
buttons, but I don't know for sure.
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