Linux and UNIX Man Pages

Linux & Unix Commands - Search Man Pages

getmajor(9f) [ultrix man page]

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)

Check Out this Related Man Page

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)
Man Page