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--- !ruby/object:RI::MethodDescription 
aliases: []

block_params: 
comment: 
- !ruby/struct:SM::Flow::P 
  body: Provides a mechanism for issuing low-level commands to control or query file-oriented I/O streams. Arguments and results are platform dependent. If <em>arg</em> is a number, its value is passed directly. If it is a string, it is interpreted as a binary sequence of bytes (<tt>Array#pack</tt> might be a useful way to build this string). On Unix platforms, see <tt>fcntl(2)</tt> for details. Not implemented on all platforms.
full_name: IO#fcntl
is_singleton: false
name: fcntl
params: |
  ios.fcntl(integer_cmd, arg)    => integer

visibility: public