MKFS.1
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操作系统开发
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- MKFS(1) Minix Programmer's Manual MKFS(1)
- NAME
- mkfs - make a file system
- SYNOPSIS
- mkfs [-Ldot] [-i inodes] [-b blocks] special prototype
- OPTIONS
- -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
- DESCRIPTION
- 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)
- 1
- MKFS(1) Minix Programmer's Manual MKFS(1)
- 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).
- The maximum size of a file system is 1 Gb for a version 2 file system,
- and 64 Mb for a version 1 file system. Alas the 8086 fsck runs out of
- memory on a V2 file system larger than 128 Mb, so for the 8086 version of
- MINIX you have to limit yourself to file systems of that size.
- SEE ALSO
- mkproto(1), fsck(1), mount(1).
- 2