snoop

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          snoop() - snoop an interactive user

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          varargs object snoop( object snooper, object snoopee );

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          When both arguments are used, begins snooping of `snoopee'
          by `snooper'.  If the second argument is omitted, turns off
          all snooping by `snoopee'.  Security for snoop() is normally
          controlled by a simul_efun.  snoop() returns `snoopee' if
          successful in the two-argument case, and `snooper' if it was
          successful in the single-argument case.  A return of 0
          indicates failure.

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          query_snoop(3), query_snooping(3)

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