XWin shows in "ps -a" but not in "ps"

[Fergus <fergus at bonhard dot uklinux dot net>]

I have XWin running and it shows up as a process under
ps -a
but not under
ps

I think this behaviour is recent: certainly it has perturbed what were 
previously well-behaved scripts.

Supplementary:
I was basically using ps | grep in a script to query whether XWin was 
running. Am I correct that there is a procedure built in that will 
achieve this?

Thank you.

Fergus


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