Standard C Library Functions                          makedev(3C)



NAME
     makedev, major, minor - manage a device number

SYNOPSIS
     #include 
     #include 

     devt makedev(majort maj, minort min);


     majort major(devt device);


     minort minor(devt device);


DESCRIPTION
     The makedev() function returns a formatted device number  on
     success and NODEV on failure.  The maj argument is the major
     number.  The min argument is the  minor  number.   The  mak-
     edev()  function  can  be used to create a device number for
     input to mknod(2).


     The major() function returns the major number component from
     device.


     The minor() function  returns  the  minor  number  component
     from device.

RETURN VALUES
     Upon successful completion, makedev()  returns  a  formatted
     device number. Otherwise, NODEV is returned and errno is set
     to indicate the error.

ERORS
     The makedev() function will fail if:

     EINVAL    One or both of the arguments maj and  min  is  too
               large,  or  the device number created from maj and
               min is NODEV.



     The major() function will fail if:

     EINVAL    The device argument is NODEV, or the major  number
               component of device is too large.






SunOS 5.11          Last change: 29 Dec 1996                    1






Standard C Library Functions                          makedev(3C)



     The minor() function will fail if:

     EINVAL    The device argument is NODEV.


ATRIBUTES
     See attributes(5) for descriptions of the  following  attri-
     butes:



     
           ATRIBUTE TYPE               ATRIBUTE VALUE       
    
     MT-Level                     MT-Safe                     
    


SEE ALSO
     mknod(2), stat(2), attributes(5)



































SunOS 5.11          Last change: 29 Dec 1996                    2