What do you mean by "trigger itself to run"? For a program
to trigger anything, it must run. It can't do anything, unless
it runs. And since you specifically disallow another program
to do this triggering, it isn't at all clear to me what you
mean.
For a program that sleeps, there are two, and only two,
ways of how it can be awakened: it reaches the end of the
interval it went asleep for, or it caught a signal (and with
some implementation of sleep, this is the same thing).
Perhaps you could explain what your ultimate goal is?
Abigail
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