ios.ioctl(integer_cmd, arg)    → integer

Provides a mechanism for issuing low-level commands to control or query I/O devices. Arguments and results are platform dependent. If arg 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 ioctl(2) for details. Not implemented on all platforms.

Source Code

/*
*  call-seq:
*     ios.ioctl(integer_cmd, arg)    => integer
*  
*  Provides a mechanism for issuing low-level commands to control or
*  query I/O devices. Arguments and results are platform dependent. If
*  <i>arg</i> 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 <code>ioctl(2)</code> for details. Not implemented on
*  all platforms.
*/

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

   rb_scan_args(argc, argv, "11", &req, &arg);
   return rb_io_ctl(io, req, arg, 1);
}