module IOCTL
Included Modules
Extended Modules
Defined in:
asm-generic/ioctl.crioctl.cr
Constant Summary
-
DIRBITS =
2 -
IOC_DIRMASK =
((1 << IOC_DIRBITS) - 1) -
IOC_DIRSHIFT =
IOC_SIZESHIFT + IOC_SIZEBITS -
IOC_IN =
(IOC_WRITE << IOC_DIRSHIFT) -
for the drivers/sound files...
-
IOC_INOUT =
((IOC_WRITE | IOC_READ) << IOC_DIRSHIFT) -
IOC_NONE =
0_u32 -
IOC_NRBITS =
8 -
The following is for compatibility across the various Linux platforms. The generic ioctl numbering scheme doesn't really enforce a type field. De facto, however, the top 8 bits of the lower 16 bits are indeed used as a type field, so we might just as well make this explicit here. Please be sure to use the decoding macros below from now on.
-
IOC_NRMASK =
((1 << IOC_NRBITS) - 1) -
IOC_NRSHIFT =
0 -
IOC_OUT =
(IOC_READ << IOC_DIRSHIFT) -
IOC_READ =
2_u32 -
IOC_SIZEBITS =
14 -
Let any architecture override either of the following before including this file.
-
IOC_SIZEMASK =
((1 << IOC_SIZEBITS) - 1) -
IOC_SIZESHIFT =
IOC_TYPESHIFT + IOC_TYPEBITS -
IOC_TYPEBITS =
8 -
IOC_TYPEMASK =
((1 << IOC_TYPEBITS) - 1) -
IOC_TYPESHIFT =
IOC_NRSHIFT + IOC_NRBITS -
IOC_WRITE =
1_u32 -
IOCSIZE_MASK =
(IOC_SIZEMASK << IOC_SIZESHIFT) -
IOCSIZE_SHIFT =
(IOC_SIZESHIFT) -
VERSION =
"0.1.0"