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Unix Version 7 - man page for mkfs (v7 section 1M)

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MKFS(1M)										 MKFS(1M)

       mkfs - construct a file system

       /etc/mkfs special proto

       Mkfs  constructs  a  file  system  by writing on the special file special according to the
       directions found in the prototype file proto.  The prototype file  contains  tokens  sepa-
       rated  by  spaces  or  new lines.  The first token is the name of a file to be copied onto
       block zero as the bootstrap program, see bproc(8).  The second token is a number  specify-
       ing the size of the created file system.  Typically it will be the number of blocks on the
       device, perhaps diminished by space for swapping.  The next token is the number of i-nodes
       in the i-list.  The next set of tokens comprise the specification for the root file.  File
       specifications consist of tokens giving the mode, the user-id, the group id, and the  ini-
       tial contents of the file.  The syntax of the contents field depends on the mode.

       The mode token for a file is a 6 character string.  The first character specifies the type
       of the file.  (The characters -bcd specify regular, block special, character  special  and
       directory files respectively.)  The second character of the type is either u or - to spec-
       ify set-user-id mode or not.  The third is g or - for the set-group-id mode.  The rest  of
       the  mode  is  a  three digit octal number giving the owner, group, and other read, write,
       execute permissions, see chmod(1).

       Two decimal number tokens come after the mode; they specify the user and group ID's of the
       owner of the file.

       If  the	file is a regular file, the next token is a pathname whence the contents and size
       are copied.

       If the file is a block or character special file, two decimal number tokens  follow  which
       give the major and minor device numbers.

       If  the	file  is  a directory, mkfs makes the entries .  and ..  and then reads a list of
       names and (recursively) file specifications for the entries in the directory.  The scan is
       terminated with the token $.

       If  the	prototype file cannot be opened and its name consists of a string of digits, mkfs
       builds a file system with a single empty directory on it.  The size of the file system  is
       the  value  of proto interpreted as a decimal number.  The number of i-nodes is calculated
       as a function of the filsystem size.  The boot program is left uninitialized.

       A sample prototype specification follows:

	    4872 55
	    d--777 3 1
	    usr  d--777 3 1
		 sh   ---755 3 1 /bin/sh
		 ken  d--755 6 1
		 b0   b--644 3 1 0 0
		 c0   c--644 3 1 0 0

       filsys(5), dir(5), bproc(8)

       There should be some way to specify links.

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