makedev

 

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 Standard C Library Functions                          makedev(3C)
 
 
 


NAME
      makedev, major, minor - manage a device number
 


SYNOPSIS
      #include <sys/types.h>
      #include <sys/mkdev.h>
 
      dev_t makedev(major_t maj, minor_t min);
 
      major_t major(dev_t device);
 
      minor_t minor(dev_t 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.
 
 ERRORS
      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 com-
            ponent of device is too large.
 
      The minor() function will fail if:
 
      EINVAL
            The device argument is NODEV.
 


ATTRIBUTES
 
 
 
 
 SunOS 5.8           Last change: 29 Dec 1996                    1
 
 
 
 
 
 
 Standard C Library Functions                          makedev(3C)
 
 
 
      See attributes(5) for descriptions of the  following  attri-
      butes:
 
      ____________________________________________________________
     |       ATTRIBUTE TYPE        |       ATTRIBUTE VALUE       |
     |_____________________________|_____________________________|
     | MT-Level                    | MT-Safe                     |
     |_____________________________|_____________________________|
 
 


SEE ALSO
      mknod(2), stat(2), attributes(5)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 SunOS 5.8           Last change: 29 Dec 1996                    2
 
 
 

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