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instance method

IO#ioctl

(::Integer integer_cmd, ::String | ::Integer argument) -> ::Integer

ioctl(integer_cmd, argument) → integer

static VALUE
rb_io_ioctl(int argc, VALUE *argv, VALUE io)
{
    VALUE req, arg;

    rb_scan_args(argc, argv, "11", &req, &arg);
    return rb_ioctl(io, req, arg);
}

Invokes Posix system call ioctl(2), which issues a low-level command to an I/O device.

Issues a low-level command to an I/O device. The arguments and returned value are platform-dependent. The effect of the call is platform-dependent.

If argument argument is an integer, it is passed directly; if it is a string, it is interpreted as a binary sequence of bytes.

Not implemented on all platforms.

See also #internal_encoding #ioflush #inspect #isatty also in 4.0 · 3.4 · 3.3 · 3.2 · 3.1 · 3.0

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