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# Adventures In ioctl(2) Support
Decoding Request Numbers

> The library uses a table
>     const explain_iocontrol_t *const explain_iocontrol_table[] =
>     {
>         &explain_iocontrol_blkbszget,
>         blah blah blah
>         &explain_iocontrol_vt_waitactive,
>     }
> Using manual OO techniques
>     struct explain_iocontrol_t
>     {
>         const char *name;
>         int number;
>         int (*disambiguate)(int fildes, int request, const void *data);
>         void (*print_data)(int fildes, int request, const void *data);
>         void (*print_explanation)(int fildes, int request, const void *data);
>         etc
>     };
libexplain/iocontrol.h libexplain/iocontrol/table.c libexplain/iocontrol/name.c