




Command:   mkfs - make a file system
Syntax:    mkfs [-Ldot] [-i inodes] [-b blocks] special prototype
Flags:     -L  Make a listing on standard output
           -d  Use mod time of mkfs binary for all files
           -o  Use a drive other than 0 or 1 (safety precaution)
           -t  Do not test if file system fits on the medium
           -1  Make a version 1 file system (for backward compatibility)
           -i  Number of i-nodes (files)
           -b  Filesystem size
Examples:  mkfs /dev/fd1 proto      # Make a file system on /dev/fd1
           mkfs -b 360 /dev/fd1     # Make empty 360 block file system
           mkfs /dev/fd1 360        # Alternate way to specify the size

     Mkfs builds a file system and copies specified files  to  it.   The
prototype  file tells which directories and files to copy to it.  If the
prototype file cannot be opened, and  its  name  is  just  a  string  of
digits,  an  empty file system will be made with the specified number of
blocks.  A sample prototype file follows.  The text following the # sign
in  the example below is comment.  In real prototype files, comments are
not allowed.


  boot                              # boot block file (ignored)
  360 63                            # blocks and i-nodes
  d--755 1 1 # root directory
    bin d--755 2 1 # bin dir: mode (755), uid (2), gid (1)
        sh   ---755 2 1 /user/bin/shell # shell has mode rwxr-xr-x
        mv   -u-755 2 1 /user/bin/mv # u = SETUID bit
        login -ug755 2 1 /user/bin/login # SETUID and SETGID
    $                               # end of /bin
    dev d--755 2 1 # special files: tty (char), fd0 (block)
        tty  c--777 2 1 4 0         # uid=2, gid=1, major=4, minor=0
        fd0  b--644 2 1 2 0 360     # uid, gid, major, minor, blocks
    $                               # end of /dev
    user d--755 12 1 # user dir: mode (755), uid (12), gid (1)
        ast  d--755 12 1            # /user/ast
        $                           # /user/ast is empty
    $                               # end of /user
  $                                 # end of root directory


The first entry on each line (except the first 3 and the $ lines,  which
terminate directories) is the name the file or directory will get on the
new file system. Next comes its mode, with  the  first  character  being
-dbc  for  regular files, directories, block special files and character
special files, respectively.   The  next  two  characters  are  used  to
specify  the  SETUID  and  SETGID  bits, as shown above.  The last three
characters of the mode are the rwx protection bits.

     Following the mode are the uid and gid.   For  special  files,  the
major  and  minor  devices  are needed.  The size in blocks must also be
specified for block special files (the MINIX block size is 1K; this  can
only  be  changed  by  changing  BLOCK_SIZE  and  then  recompiling  the
operating system).




                                                                        



                                                                        




























































                                                                        

