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man pages section 4: Device and Network Interfaces

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Updated: Wednesday, July 27, 2022



vuidmice, vuidm3p, vuidm4p, vuidm5p, vuid2ps2, vuid3ps2 - converts mouse protocol to Firm Events


#include <sys/stream.h>
#include <sys/vuid_event.h>
#include <sys/vuid_wheel.h>
int ioctl(fd, I_PUSH, vuidm3p);
int ioctl(fd, I_PUSH, vuidm4p);
int ioctl(fd, I_PUSH, vuidm5p);
int ioctl(fd, I_PUSH, vuid2ps2);
int ioctl(fd, I_PUSH, vuid3ps2);


The STREAMS modules vuidm3p, vuidm4p, vuidm5p, vuid2ps2, and vuid3ps2 convert mouse protocols to Firm events. The Firm event structure is described in <sys/vuid_event.h>. Pushing a STREAMS module does not automatically enable mouse protocol conversion to Firm events. The STREAMS module state is initially set to raw or VUID_NATIVE mode which performs no message processing. You must change the state to VUID_FIRM_EVENT mode to initiate mouse protocol conversion to Firm events. This can be accomplished by the following code:

int format;
ioctl(fd, VUIDSFORMAT, &format);

You can also query the state of the STREAMS module by using the VUIDGFORMAT option.

int format;
int fd;	/* file descriptor */
ioctl(fd, VUIDGFORMAT, &format);
if ( format == VUID_NATIVE );
	/* The state of the module is in raw mode.
	 * Message processing is not enabled.
if ( format == VUID_FIRM_EVENT );
	/* Message processing is enabled.
	 * Mouse protocol conversion to Firm events
	 * are performed.

The remainder of this section describes the processing of STREAMS messages on the read- and write-side.

Read Side Behavior


Incoming messages are queued and converted to Firm events.


The read queue of the module is flushed of all its data messages and all data in the record being accumulated are also flushed. The message is passed upstream.

Write Side Behavior


Messages sent downstream as a result of an ioctl(2) system call. The two valid ioctl options processed by the vuidmice modules are VUIDGFORMAT and VUIDSFORMAT.


The write queue of the module is flushed of all its data messages and the message is passed downstream.


This option returns the current state of the STREAMS module. The state of the vuidmice STREAMS module may either be VUID_NATIVE (no message processing) or VUID_FIRM_EVENT (convert to Firm events).


This option sets the state of the STREAMS module to VUID_FIRM_EVENT. If the state of the STREAMS module is already in VUID_FIRM_EVENT , this option is non-operational. It is not possible to set the state back to VUID_NATIVE once the state becomes VUID_FIRM_EVENT. To disable message processing, pop the STREAMS module out by calling ioctl(fd, 1I_POP, vuid*).

The following wheel support ioctls are defined for PS/2 mouse only:


This ioctl takes a pointer to an integer as argument and sets the value of the integer to the number of wheels available on this device.


This command returns static information about the wheel that does not change while a device is in use. Currently the only information defined is the wheel orientation which is either VUID_WHEEL_FORMAT_VERTICAL or VUID_WHEEL_FORMAT_HORIZONTAL.

   typedef struct {
           int     vers;
           int     id;
           int     format;
   } wheel_info;

The ioctl takes a pointer to "wheel_info" structure with the "vers" set to the current version of the "wheel_info" structure and "id" set to the id of the wheel for which the information is desired.


VUIDSWHEELSTATE sets the state of the wheel to that specified in the stateflags. VUIDGWHEELSTATE returns the current state settings in the stateflags field.

stateflags is an OR'ed set of flag bits. The only flag currently defined is VUID_WHEEL_STATE_ENABLED.

When stateflags is set to VUID_WHEEL_STATE_ENABLED the module converts motion of the specified wheel into VUID events and sends those up stream.

Wheel events are disabled by default.

Applications that want to change a flag should first get the current flags and then change only the bit they want.

   typedef struct {
           int             vers;
           int            id;
           uint32_t       stateflags;
    } wheel_state;

These ioctls take pointer to 'wheel_state' as an argument with the 'vers' and 'id' members filled up. These members have the same meaning as that for 'VUIDGWHEELINFO' ioctl.

Mouse Configurations

Protocol Type
3-Byte Protocol Microsoft 2 Button Serial Mouse
4-Byte Protocol Logitech 3 Button Mouseman
Logitech 3 Button Bus Mouse Microsoft Bus Mouse
/dev/logi/ dev/msm
PS/2 Protocol 2 Button PS/2 Compatible Mouse
PS/2 Protocol 3 Button PS/2 Compatible Mouse


See attributes(7) for descriptions of the following attributes:


See Also

virtualkm(4D), attributes(7)

STREAMS Programming Guide