MKFS.1
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上传日期:2007-01-18
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- .TH MKFS 1
- .SH NAME
- mkfs - make a file system
- .SH SYNOPSIS
- fBmkfs fR[fB-LdotfR] [fB-i fIinodesfR] [fB-b fIblocksfR] fIspecial fIprototypefR
- .br
- .de FL
- .TP
- \fB\$1\fR
- \$2
- ..
- .de EX
- .TP 20
- \fB\$1\fR
- # \$2
- ..
- .SH OPTIONS
- .FL "-L" "Make a listing on standard output"
- .FL "-d" "Use mod time of fImkfsfR binary for all files"
- .FL "-o" "Use a drive other than 0 or 1 (safety precaution)"
- .FL "-t" "Do not test if file system fits on the medium"
- .FL "-1" "Make a version 1 file system (for backward compatibility)"
- .FL "-i" "Number of i-nodes (files)"
- .FL "-b" "Filesystem size"
- .SH EXAMPLES
- .EX "mkfs /dev/fd1 proto" "Make a file system on fI/dev/fd1fR"
- .EX "mkfs -b 360 /dev/fd1" "Make empty 360 block file system"
- .EX "mkfs /dev/fd1 360" "Alternate way to specify the size"
- .SH DESCRIPTION
- .PP
- .I 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 fI#fR sign in the example below is comment.
- In real prototype files, comments are not allowed.
- .PP
- .nf
- .ta 0.20i 0.70i 1.10i 3i 3.5i 4i
- 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 fIrwxr-xr-xfP
- mv -u-755 2 1 /user/bin/mv # u = SETUID bit
- login -ug755 2 1 /user/bin/login # SETUID and SETGID
- $ # end of fI/binfP
- 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 fI/devfP
- user d--755 12 1 # user dir: mode (755), uid (12), gid (1)
- ast d--755 12 1 # fI/user/astfP
- $ # fI/user/astfP is empty
- $ # end of fI/userfP
- $ # end of root directory
- .PP
- .fi
- 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
- fB-dbcfR 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
- .I rwx
- protection bits.
- .PP
- 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
- s-2MINIXs+2
- block size is 1K; this can only be changed by changing
- .I BLOCK_SIZE
- and then recompiling the operating system).
- .PP
- 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
- .I fsck
- runs out of memory on a V2 file system larger than 128 Mb, so for the 8086
- version of
- s-2MINIXs+2
- you have to limit yourself to file systems of that size.
- .SH "SEE ALSO"
- .BR mkproto (1),
- .BR fsck (1),
- .BR mount (1).