HPUX 10.20 Missing Semaphores

[Michael Mcgurl]

ipcs command does not return any message queues, shared
memory or semaphores on a machine known to be
using semaphores when the command was invoked.

What needs to be done to get ipcs to return the
normal result set. ipcrm was not used to clear semaphores.

Any suggestions?

[Paul Hite_2]

Well, first of all /usr/bin/ipcs must have its groups set to sys and must have
a mode of 2555. That is, it must be setgid to sys.

Both /dev/kmem and /stand/vmunix must be readable by the group sys.

Finally, /stand/vmunix must be an image of the currently executing kernel. If
you rebuild the kernel and create a new /stand/vmunix, programs like ipcs will
possibly fail until after a reboot.

If it's not one of these, then I'm stumped.

[Steve White_2]

I had a server running 10.20 and was unable to get ipcs to work properly. I ended up applying a patch to the posix shell and it then worked fine.