Re: localdev and fixed devices

On Sun, Sep 7, 2008 at 10:39 AM, Gideon Romm
<[email protected]> wrote:
> Hi, everybody.
>
> Please check out this branch for a proposed solution:
>
> lp:~gideon/ltsp/ltspfs-trunk-gadi
>
> I introduce an lts.conf parameter called "LOCALDEV_DENY".  With this
> parameter, you can deny local devices based upon udevinfo criteria or
> combinations of several udevinfo criteria.
>
Thats a great idea :)

> Syntax:
>
> LOCALDEV_DENY = "var1:val1,var2:val2,var3:val3+var4:val4"
>
> Which means:
>
> Deny local devices if:  var1 = val1 OR var2 = val2 OR (var3 = val3 AND
> var4 = val4)
>
> So, if I want to block all local scsi hard drives, I simply do:
>
> LOCALDEV_DENY = "ID_TYPE:disk+ID_BUS:scsi"
>
> To block all USB devices:
>
> LOCALDEV_DENY = "ID_BUS:usb"
>
> To block all IDE and SCSI hard drives:
>
> LOCALDEV_DENY = "ID_TYPE:disk+ID_BUS:scsi,ID_TYPE:disk+ID_BUS:ide"
>

Can't this be done by the script reading the variable?

We can predefine some of the common local devices, so  user just enters:

LOCALDEV_DENY_0=IDE
LOCALDEV_DENY_1=SCSI
LOCALDEV_DENY_2=USB

To block all IDE, SCSI and USB, allowing multiple use of LOCALDEV_DENY
variable. All the geeky udev stuff can be handled behind the scenes.

Cheers

-J

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