mfsys(4)                         UNIX System V                         mfsys(4)


NAME
      mfsys  -  file format.

SYNOPSIS
      mfsys

DESCRIPTION
      The mfsys file contains configuration information for file system 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 file system type.  The mfsys file is coalesced 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 file system
           type (e.g., S51K, DUFST).  This name is no more than 32 characters
           long, and by convention is composed of upper-case alphanumeric
           characters.

      2.   prefix:  The prefix in this field is the string prepended to the
           fstypsw handler functions defined for this file system type (e.g.,
           s5, du).  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
           file system 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 file system type.

      5.   function bitstring:  The function bitstring is a string of 28 0's
           and 1's.  Each file system type potentially defines 28 functions to
           populate the fstypsw data structure table entry for itself.  All
           file system 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(4).
      idinstall(1m), idbuild(1m) in the User's/System Administrator's Reference
      Manual.







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