MFSYS(F)                                   UNIX System V



     Name
          mfsys - configuration file for filesystem types


     Syntax
          /etc/conf/cf.d/mfsys


     Description
          The  mfsys  file  contains  configuration  information   for
          filesystem  types that are to be included in the next system
          kernel to  be  built.   It  is  included  in  the  directory
          /etc/conf/cf.d,  and includes a one-line description of each
          filesystem type.  The mfsys file is gathered from  component
          files in the directory /etc/conf/mfsys.d. Each line contains
          the following whitespace-separated fields:

          1.   name:  This field contains the internal  name  for  the
               filesystem  type (example: S51K, AFS).  This name is no
               more than 32 characters  long,  and  by  convention  is
               composed of uppercase alphanumeric characters.

          2.   prefix:   The  prefix  in  this  field  is  the  string
               prepended  to the fstypsw handler functions defined for
               this filesystem type (example: s5) The prefix  must  be
               no more that 8 characters long.

          3.   flags:  The flags field contains a hex  number  of  the
               form  ``0xNN'' to be used in populating the fsinfo data
               structure table entry for this filesystem type.

          4.   notify flags:  The notify flags field  contains  a  hex
               number  of  the  form ``0xNN'' to be used in population
               the  fsinfo  data  structure  table  entry   for   this
               filesystem type.

          5.   function bitstring:  The function bitstring is a string
               of 28 zeros and ones.  Each filesystem type potentially
               defines 28  functions  to  populate  the  fstypsw  data
               structure table entry for itself.  All filesystem types
               do not supply all the functions in this table, however,
               and  this  bitstring  is  used to indicate which of the
               functions are present and which are absent.  A ``1'' in
               this   string   indicates  that  a  function  has  been
               supplied, and a ``0'' indicates that a function has not
               been  supplied.   Successive  characters  in the string
               represent  successive  elements  of  the  fstypsw  data
               structure,  with the first entry in this data structure
               represented by the rightmost character in the string.


     See Also
          sfsys(F), idinstall(ADM), idbuild(ADM)


     (printed 8/23/89)                                  MFSYS(F)