makedevice(9f) [osf1 man page]

makedevice(9F)						   Kernel Functions for Drivers 					    makedevice(9F)

NAME

       makedevice - make device number from major and minor numbers

SYNOPSIS

       #include <sys/types.h>
       #include <sys/mkdev.h>
       #include <sys/ddi.h>

       dev_t makedevice(major_t majnum, minor_t minnum);

INTERFACE LEVEL

       Architecture independent level 1 (DDI/DKI).

PARAMETERS

       majnum	       Major device number.

       minnum	       Minor device number.

DESCRIPTION

       makedevice()  creates  a  device number from a major and minor device number.   makedevice() should be used to create device numbers so the
       driver will port easily to releases that treat device numbers differently.

RETURN VALUES

       The device number, containing both the major number and the minor number, is returned. No validation of the major or minor numbers is  per-
       formed.

CONTEXT

       makedevice() can be called from user or interrupt context.

SEE ALSO

       getmajor(9F), getminor(9F)

SunOS 5.10							    11 Apr 1991 						    makedevice(9F)

getmajor(9F)						   Kernel Functions for Drivers 					      getmajor(9F)

NAME

       getmajor - get major device number

SYNOPSIS

       #include <sys/types.h>
       #include <sys/mkdev.h>
       #include <sys/ddi.h>

       major_t getmajor(dev_t dev);

INTERFACE LEVEL

       Architecture independent level 1 (DDI/DKI).

PARAMETERS

       dev	Device number.

DESCRIPTION

       getmajor() extracts the major number from a device number.

RETURN VALUES

       The major number.

CONTEXT

       getmajor() can be called from user or interrupt context.

EXAMPLES

       Example 1: Using getmajor()

       The  following example shows both the  getmajor() and getminor(9F) functions used in a debug  cmn_err(9F) statement to return the major and
       minor numbers for the device supported by the driver.

	      dev_t dev;

	      #ifdef DEBUG
	      cmn_err(CE_NOTE,"Driver Started.	Major# = %d,
		   Minor# = %d", getmajor(dev), getminor(dev));
	      #endif

SEE ALSO

       cmn_err(9F), getminor(9F), makedevice(9F)

       Writing Device Drivers

WARNINGS

       No validity checking is performed.  If  dev is invalid, an invalid number is returned.

SunOS 5.10							    11 Apr 1991 						      getmajor(9F)