Schedule an alarm for a program when starting it.
USAGE: alarm <TIME> <COMMAND> <ARGS...>
Recognised patterns for <TIME>:
<SECONDS>[s]
<MINUTES>m[<SECONDS>s]
<HOURS>h[<MINUTES>m][<SECONDS>s]
All values are non-negative integers, and
the interval must be greater than zero and
at most 18h12m15s.