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alcove

0.40.3
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Control plane for Unix processes, containers and sandboxes

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alcove edoc select-6.edoc
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edoc/select-6.edoc 

@doc select(2): poll a list of file descriptor for events



select/6 will block until an event occurs on a file descriptor, a timeout

is reached or interrupted by a signal.



The Timeout value may be:



• an empty list ([]): causes select to block indefinitely (no timeout)



• an alcove_timeval record



An alcove_timeval record contains these fields:



• sec : number of seconds to wait



• usec : number of microseconds to wait



== Examples ==



```

1> {ok, Drv} = alcove_drv:start().

{ok,<0.177.0>}

2> {ok, FD} = alcove:open(Drv, [], "/dev/null", [o_rdwr], 0).

{ok,6}

3> alcove:select(Drv, [], [FD], [FD], [FD], []).

{ok,[6],[6],[]}

4> rr(alcove).

[alcove_jail,alcove_pid,alcove_rlimit,alcove_timeval]

5> alcove:select(Drv, [], [FD], [FD], [FD], #alcove_timeval{sec = 1, usec = 1}).

{ok,[6],[6],[]}

'''