Re: [gdm-list] GDM - gdmdynamic and Sun Ray support

[Mike Oliver <Mike Oliver Sun COM>]

Brian Cameron wrote:
>  > 'dtlogin' also gives special treatment to an X server that is
>  > designated as being "on-console", because some utmpx consumers
>  > want to recognise that case.  I've lost track of whether GDM
>  > provides the same special treatment.
>
> Not quite true.  You can configure CDE login to specify the
> device name.  In /usr/dt/config/Xservers you define a display as
> follows.
>
>    :0   Local local_uid console root /usr/X11/bin/Xserver :0 -nobanner

Yes.  That's what I meant by "designated".  dtlogin doesn't try
to guess whether an X server is on-console, it must be explicitly
told.

> The "@console" part defines this to be the /dev/console.  If you want
> a different string to be passed to utmp/wtmp you could set this to
> whatever you wanted.  You would probably have utmp/wtmp issues if you
> set it to a string that didn't correspond to a real device, though.

You'll also have ITE (command-line login) issues.  You can't just
make up stuff to follow the @.

Anyway, we're way off-topic from the original issue of GDM being
able to manage and unmanage additional displays dynamically.

Mike.
--
mike oliver sun com


> GDM and CDE login does have some special case logic for the display
> associated with /dev/console, which I think only affects Solaris.
> Mainly this relates to logindevperm processing (and the ability to
> "drop-to-console" in CDE login).  On Solaris machines which do not have
> VT enabled, you only want to do logindevperm processing for the display
> associated with /dev/console.  With VT enabled, you want to do l
> logindevperm processing for any VT display.
>
> Starting in GDM 2.20, you can specify the device in the [server]
> section, so if you want to specify what utmp string to use, it will
> use that.  It looks like this:
>
> [servers]
> 0=Standard device=/dev/console
>
> This way you have some mechanism to define the device that is
> associated with the display, if you want to control the string that
> gets passed to utmp/wtmp.
>
> When Virtual Terminals are used, the device name associated with
> the display is something like /dev/vt/%d for Solaris, /dev/tty%d
> on Linux, or /dev/ttyv%s on FreeBSD.  Now that VT is going into
> Solaris Nevada in the near future, both CDE login and GDM have been
> enhanced to use the VT device with utmp/wtmp when VT is being used.
>
> Using ConsoleKit, I'm guessing it will take care of ensuring that
> the device name is set to reasonable values when VT is not being
> used.  It probably should also allow distros to define what
> string should be used for attached non-console displays (such as
> Sun Ray devices where it could be set to /dev/dtlocal on Solaris)
> and to define what string should be used for remote displays
> where it could be set to /dev/dtremote on Solaris.  Some distros
> may opt to leave these empty, which is the current behavior in GDM.
>
> Brian