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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 I/O devices. 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. On Unix platforms, see <tt>ioctl(2)</tt> for details. Not implemented on all platforms. full_name: IO#ioctl is_singleton: false name: ioctl params: | ios.ioctl(integer_cmd, arg) => integer visibility: public