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#1 (**permalink**) 02-21-2008, 04:47 AM

I am a new Slackware 12.0 user who recently transitioned from Mandriva.
I am very pleased with what the results have been so far. It has been
a great deal easier to set-up and get going than I was led to believe.

One thing that I have not been able to figure out or to find much
information on is configuring the serial posts for non-root users. I
have some equipment that use 3 serial ports. I can issue the command
"chmod a+rw /dev/ttySx" as root to allow users to access the ports, but
after a shutdown or a re-boot they default back to only root access.

Do I need to add the users to a certain group to allow access, or write
a start-up script to initialize the ports for users upon boot? If a
script is needed, where should it go? Any help would be appreciated.

Thanks,
Larry

#2 (**permalink**) 02-21-2008, 04:47 AM

Larry wrote:
> I am a new Slackware 12.0 user who recently transitioned from Mandriva.
> I am very pleased with what the results have been so far. It has been
> a great deal easier to set-up and get going than I was led to believe.
>
> One thing that I have not been able to figure out or to find much
> information on is configuring the serial posts for non-root users. I
> have some equipment that use 3 serial ports. I can issue the command
> "chmod a+rw /dev/ttySx" as root to allow users to access the ports, but
> after a shutdown or a re-boot they default back to only root access.
>
> Do I need to add the users to a certain group to allow access, or write
> a start-up script to initialize the ports for users upon boot? If a
> script is needed, where should it go? Any help would be appreciated.

The proper way is to configure udev; see for example

http://www.reactivated.net/writing_udev_rules.html

Alternatively you can put the chmod command in /etc/rc.d/rc.local so
that it will be executed at each boot.

Olive

#3 (**permalink**) 02-21-2008, 04:47 AM

Olive wrote:

>>
>> Do I need to add the users to a certain group to allow access, or
>> write a start-up script to initialize the ports for users upon boot?
>> If a script is needed, where should it go? Any help would be
>> appreciated.
>
> The proper way is to configure udev; see for example
>
> http://www.reactivated.net/writing_udev_rules.html
>
> Alternatively you can put the chmod command in /etc/rc.d/rc.local so
> that it will be executed at each boot.
>
> Olive

Olive,
I edited the udev.rules file section entitled "#Serial or Dialout
Devices" to change the port permissions from 0660 to 0666 and I added
users to the uucp group, and now all is well. Thanks so much for the help.
Larry

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