"If you make a single-instance program, and somebody runs a second copy
of the program and passes a command line, the most common way of handling
this is to hand the command line to the first copy of the program and let
the first copy deal with it.
When you do this, don't forget about the current directory."
"It doesn't have to be bulletproof, if it is not possible (i.e. firewall) then the
application should just continue. And I don't want to make the user set up
some kind of central service to track the instances."
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