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20010430: gempak and system rebuild

Chris,
GEMPAK programs require Message queues. McIDAS requires shared memory segments.

You should know if you have message queues available by running
a simple program like gpmap. You should see gplt get fired up.
Then your ipcs commans will show the message queue.

Since you are producing gifs, it sounds like you do have message queues.

Nothing in that regard has changed since 5.4. 

Steve Chiswell
Unidata User Support


>From: address@hidden (Chris Hennon)
>Organization: UCAR/Unidata
>Keywords: 200104301601.f3UG18L00971

>Steve -
>
>I had been running 5.4 until a hacker attack prompted a system rebuild.  I
>thought it would be a good time to upgrade to 5.6A and so did.  I'm
>experiencing quite a struggle in getting just a couple of my old scripts
>running properly.  What inevitably happens is a script would run normally
>for awhile, producing several gifs, and then it would spit out a "could
>not fork" error, obviously unable to launch any more processes.  During
>this time a lot of dead message queues fill up, even though gpend is
>faithfully being executed after each process.  
>
>What I think may have happened is that we turned off a lot of things that
>are potential security holes in Solaris 2.7 - I noticed that when I run
>"ipcs" it returns:
>
>IPC status from <running system> as of Mon Apr 30 11:44:02 EDT 2001
>Message Queue facility inactive. 
>Shared Memory facility inactive.
>T      ID      KEY     MODE    OWNWER  GROUP
>Semaphores:
>#
>
>I remember that before, these things were active and root always had one
>message queue there.  So, I was wondering if this could be a problem for
>me?
>
>Thanks.
>
>Chris
>