/dev/ttyS0 permission error

[Gilboa Davara]

On Sun, 2006-12-03 at 07:37 -0600, Jay Cliburn wrote:
> Gilboa Davara wrote:
> > On Sat, 2006-12-02 at 21:23 -0600, Jay Cliburn wrote:
> 
> >> The current workaround is to add non-root users to the uucp group.  (Or maybe 
> >> this is the solution?)  Any ideas why I can't get a udev rule to change the 
> >> perms to 0666 on /dev/ttyS0?
> 
> > Why not solve the problem using the uucp group? It's the designed
> > solution?
> 
> Your final question mark indicates you have the same question I do:  Is the uucp 
> group *the* solution for non-root users needing to access the serial port.

I do not think it means what you think it means. [1].
My bad. (Bad wording on my part)
AFAIK uucp is the designated group for serial port users.

> 
> My other question is why doesn't a non-default udev rule work as expected on 
> /dev/ttyS*

No idea.
Add some "echos" to the script and check who's changing the access mode.

- Gilboa

[1] The Princess Bride: http://www.imdb.com/title/tt0093779/quotes