getmajor(D3) getmajor(D3)
NAME
getmajor - get internal major device number
SYNOPSIS
#include <sys/types.h>
#include <sys/ddi.h>
major_t getmajor(dev_t dev);
Arguments
dev Internal device number.
DESCRIPTION
The getmajor function extracts the internal major number from
a device number.
Return Values
The internal major number.
USAGE
No validity checking is performed. If dev is invalid, an
invalid number is returned.
See getemajor(D3) for an explanation of external and internal
major numbers.
Level
Initialization, Base or Interrupt.
Synchronization Constraints
Does not sleep.
Driver-defined basic locks, read/write locks, and sleep locks
may be held across calls to this function.
REFERENCES
etoimajor(D3), getemajor(D3), geteminor(D3), getminor(D3),
makedevice(D3)
NOTICES
Portability
All processors
Applicability
ddi: 1, 2, 3, 4, 5, 5mp, 6, 6mp, 7, 7mp
Copyright 1994 Novell, Inc. Page 1