Daniel Browne wrote:
> Hi Greg,
>
> I'm working out a setup for rendering with CS5 After Effects and it appears Adobe still
> expects you to be logged into the desktop as the user executing the job.
Yes, after effects is still one of those renderers that has not yet
separated their command line renderer from the GUI. AE's command line
renderer, "aerender", still fires off the GUI and communicates with it
to make the render happen. So it is still tied to the window manager,
and this causes lots of weirdness. AE has always been this way, and
it seems they have a very hard time changing it.
> Is there a way
> to force only AE scripts to execute as a specific user?
You can use normal unix techniques to make the 'aerender' executable
run as any user you want, just by setting the perms on the executable, eg:
chown 0:0 /path/to/aerender
chmod 4755 /path/to/aerender
..which will make aerender run as root (and all that implies)
no matter what user invoked the command.
Root is never denied access to the window manager, so that would
force it to not have permission issues with the window manager.
However, if you prefer to have aerender run as a normal user, you can
use the same commands in a similar way.
For instance if the username is 'render' and the group is "users",
then you can use:
chown render:users /path/to/aerender
chmod 4755 /path/to/aerender
..to make "aerender" run as 'render' instead.
Usually just making the aerender executable setuid as the user you want
would do the trick, but in the recent versions of AE (CS3 and CS4 and
possibly 5), you may need to go an extra step and make the AE GUI binary
setuid.
(It used to be the case that 'aerender' started the AE GUI with fork()/exec(),
such that the GUI was part of the same process hierarchy, but they made a mistake
in CS3 that causes the GUI to disconnect from the process hierarchy.. meh)
Someday we really all should hope Adobe will rewrite aerender so that it
does the rendering itself, and does not need the GUI to do any rendering.
This way distributed rendering with AE would be solid like the rest of the
compositors (nuke, shake..)
--
Greg Ercolano, erco@(email surpressed)
Seriss Corporation
Rush Render Queue, http://seriss.com/rush/
Tel: (Tel# suppressed)
Fax: (Tel# suppressed)
Cel: (Tel# suppressed)
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