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Macros
#define	IOCPARM_SHIFT 13 /* number of bits for ioctl size */

#define	IOCPARM_MASK ((1 << IOCPARM_SHIFT) - 1) /* parameter length mask */

#define	IOCPARM_LEN(x) (((x) >> 16) & IOCPARM_MASK)

#define	IOCBASECMD(x) ((x) & ~(IOCPARM_MASK << 16))

#define	IOCGROUP(x) (((x) >> 8) & 0xff)

#define	IOCPARM_MAX (1 << IOCPARM_SHIFT) /* max size of ioctl */

#define	IOC_VOID 0x20000000 /* no parameters */

#define	IOC_OUT 0x40000000 /* copy out parameters */

#define	IOC_IN 0x80000000 /* copy in parameters */

#define	IOC_INOUT (IOC_IN\|IOC_OUT)

#define	IOC_DIRMASK (IOC_VOID\|IOC_OUT\|IOC_IN)

#define	_IOC(inout, group, num, len)

#define	_IO(g, n) _IOC(IOC_VOID, (g), (n), 0)

#define	_IOWINT(g, n) _IOC(IOC_VOID, (g), (n), sizeof(int))

#define	_IOR(g, n, t) _IOC(IOC_OUT, (g), (n), sizeof(t))

#define	_IOW(g, n, t) _IOC(IOC_IN, (g), (n), sizeof(t))

#define	_IOWR(g, n, t) _IOC(IOC_INOUT, (g), (n), sizeof(t))

Functions
int	ioctl (int fd, int request,...)

Macro Definition Documentation

◆ IOCPARM_SHIFT

#define IOCPARM_SHIFT 13 /* number of bits for ioctl size */

Definition at line 8 of file ioccom.h.

◆ IOCPARM_MASK

#define IOCPARM_MASK ((1 << IOCPARM_SHIFT) - 1) /* parameter length mask */

Definition at line 9 of file ioccom.h.

◆ IOCPARM_LEN

#define IOCPARM_LEN ( x ) (((x) >> 16) & IOCPARM_MASK)

Definition at line 10 of file ioccom.h.

◆ IOCBASECMD

#define IOCBASECMD ( x ) ((x) & ~(IOCPARM_MASK << 16))

Definition at line 11 of file ioccom.h.

◆ IOCGROUP

#define IOCGROUP ( x ) (((x) >> 8) & 0xff)

Definition at line 12 of file ioccom.h.

◆ IOCPARM_MAX

#define IOCPARM_MAX (1 << IOCPARM_SHIFT) /* max size of ioctl */

Definition at line 14 of file ioccom.h.

◆ IOC_VOID

#define IOC_VOID 0x20000000 /* no parameters */

Definition at line 15 of file ioccom.h.

◆ IOC_OUT

#define IOC_OUT 0x40000000 /* copy out parameters */

Definition at line 16 of file ioccom.h.

◆ IOC_IN

#define IOC_IN 0x80000000 /* copy in parameters */

Definition at line 17 of file ioccom.h.

◆ IOC_INOUT

#define IOC_INOUT (IOC_IN|IOC_OUT)

Definition at line 18 of file ioccom.h.

◆ IOC_DIRMASK

#define IOC_DIRMASK (IOC_VOID|IOC_OUT|IOC_IN)

Definition at line 19 of file ioccom.h.

◆ _IOC

#define _IOC	(	inout,
		group,
		num,
		len
	)

Value:

((int) \

((inout) | (((len) & IOCPARM_MASK) << 16) | ((group) << 8) | (num)))

IOCPARM_MASK

#define IOCPARM_MASK

Definition: ioccom.h:9

Definition at line 21 of file ioccom.h.

◆ _IO

#define _IO	(	g,
		n
	)	_IOC(IOC_VOID, (g), (n), 0)

Definition at line 23 of file ioccom.h.

◆ _IOWINT

#define _IOWINT	(	g,
		n
	)	_IOC(IOC_VOID, (g), (n), sizeof(int))

Definition at line 24 of file ioccom.h.

◆ _IOR

#define _IOR	(	g,
		n,
		t
	)	_IOC(IOC_OUT, (g), (n), sizeof(t))

Definition at line 25 of file ioccom.h.

◆ _IOW

#define _IOW	(	g,
		n,
		t
	)	_IOC(IOC_IN, (g), (n), sizeof(t))

Definition at line 26 of file ioccom.h.

◆ _IOWR

#define _IOWR	(	g,
		n,
		t
	)	_IOC(IOC_INOUT, (g), (n), sizeof(t))

Definition at line 28 of file ioccom.h.

Function Documentation

◆ ioctl()

int ioctl	(	int	fd,
		int	request,
			...
	)

Macros

Functions