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alcove

0.40.2
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Control plane for Unix processes, containers and sandboxes

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alcove edoc setrlimit-4.edoc
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edoc/setrlimit-4.edoc 

@doc setrlimit(2): set a resource limit



Note on `rlimit_nofile':



The control process requires a fixed number of file descriptors for

each subprocess. Reducing the number of file descriptors will reduce

the limit on child processes.



If the file descriptor limit is below the number of file descriptors

currently used, setrlimit/4,5 will return `{error, einval}'.



== Examples ==



```

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

{ok,<0.177.0>}

2> rr(alcove).

[alcove_jail,alcove_pid,alcove_rlimit,alcove_timeval]

3> {ok, Pid} = alcove:fork(Drv, []).

{ok,28493}

4> alcove:getrlimit(Drv, [Pid], rlimit_nofile).

{ok,#alcove_rlimit{cur = 1024,max = 1048576}}

5> alcove:setrlimit(Drv, [Pid], rlimit_nofile, #alcove_rlimit{cur = 64, max = 64}).

ok

6> alcove:getrlimit(Drv, [Pid], rlimit_nofile).

{ok,#alcove_rlimit{cur = 64,max = 64}}

'''