最終更新:2013-01-06 (日) 16:05:48 (4099d)  

kernel.org/doc/Documentation/ioctl/ioctl-number.txt
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http://kernel.org/doc/Documentation/ioctl/ioctl-number.txt

内容

  • _IO - an ioctl with no parameters
  • _IOW? - an ioctl with write parameters (copy_from_user)
  • _IOR? - an ioctl with read parameters (copy_to_user)
  • _IOWR? - an ioctl with both write and read parameters.

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