| [9] | 1 | .TH MKFS 1
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| 2 | .SH NAME
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| 3 | mkfs \- make a file system
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| 4 | .SH SYNOPSIS
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| 5 | \fBmkfs \fR[\fB\-Ldot\fR] [\fB\-B \fIblocksize\fR] [\fB\-i \fIinodes\fR] [\fB\-b \fIblocks\fR] \fIspecial \fIprototype\fR
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| 6 | .br
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| 7 | .de FL
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| 8 | .TP
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| 9 | \\fB\\$1\\fR
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| 10 | \\$2
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| 11 | ..
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| 12 | .de EX
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| 13 | .TP 20
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| 14 | \\fB\\$1\\fR
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| 15 | # \\$2
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| 16 | ..
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| 17 | .SH OPTIONS
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| 18 | .FL "\-L" "Make a listing on standard output"
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| 19 | .FL "\-d" "Use mod time of \fImkfs\fR binary for all files"
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| 20 | .FL "\-o" "Use a drive other than 0 or 1 (safety precaution)"
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| 21 | .FL "\-t" "Do not test if file system fits on the medium"
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| 22 | .FL "\-1" "Make a version 1 file system (for backward compatibility)"
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| 23 | .FL "\-i" "Number of i-nodes (files)"
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| 24 | .FL "\-B" "Filesystem block size (in bytes)"
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| 25 | .FL "\-b" "Filesystem size (in blocks)"
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| 26 | .SH EXAMPLES
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| 27 | .EX "mkfs /dev/fd1 proto" "Make a file system on \fI/dev/fd1\fR"
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| 28 | .EX "mkfs -b 360 /dev/fd1" "Make empty 360 block file system"
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| 29 | .EX "mkfs /dev/fd1 360" "Alternate way to specify the size"
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| 30 | .SH DESCRIPTION
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| 31 | .PP
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| 32 | .I Mkfs
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| 33 | builds a file system and copies specified files to it.
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| 34 | The prototype file tells which directories and files to copy to it.
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| 35 | If the prototype file cannot be opened, and its name is just a string of
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| 36 | digits, an empty file system will be made with the specified number of
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| 37 | blocks.
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| 38 | A sample prototype file follows.
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| 39 | The text following the \fI#\fR sign in the example below is comment.
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| 40 | In real prototype files, comments are not allowed.
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| 41 | .PP
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| 42 | .nf
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| 43 | .ta 0.20i 0.70i 1.10i 3i 3.5i 4i
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| 44 | boot # boot block file (ignored)
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| 45 | 360 63 # blocks and i-nodes
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| 46 | d--755 1 1 # root directory
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| 47 | bin d--755 \|2 1 # bin dir: mode (755), uid (2), gid (1)
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| 48 | sh \|---755 2 1 /user/bin/shell # shell has mode \fIrwxr-xr-x\fP
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| 49 | mv -u-755 2 1 /user/bin/mv # u = SETUID bit
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| 50 | login -ug755 2 1 /user/bin/login # SETUID and SETGID
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| 51 | $ # end of \fI/bin\fP
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| 52 | dev d--755 2 1 # special files: tty (char), fd0 (block)
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| 53 | tty c--777 2 1 4 0 # uid=2, gid=1, major=4, minor=0
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| 54 | fd0 b--644 2 1 2 0 360 # uid, gid, major, minor, blocks
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| 55 | $ # end of \fI/dev\fP
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| 56 | user d--755 12 1 # user dir: mode (755), uid (12), gid (1)
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| 57 | ast d--755 12 1 # \fI/user/ast\fP
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| 58 | $ # \fI/user/ast\fP is empty
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| 59 | $ # end of \fI/user\fP
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| 60 | $ # end of root directory
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| 61 | .PP
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| 62 | .fi
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| 63 | The first entry on each line (except the first 3 and the $ lines, which
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| 64 | terminate directories) is the name the file or directory will get on the
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| 65 | new file system.
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| 66 | Next comes its mode, with the first character being
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| 67 | \fB\-dbc\fR for regular files, directories, block special files and character
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| 68 | special files, respectively.
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| 69 | The next two characters are used to specify the SETUID and SETGID bits, as
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| 70 | shown above.
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| 71 | The last three characters of the mode are the
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| 72 | .I rwx
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| 73 | protection bits.
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| 74 | .PP
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| 75 | Following the mode are the uid and gid.
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| 76 | For special files, the major and minor devices are needed.
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| 77 | .PP
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| 78 | The maximum size of a file system is 1 Gb for a version 2 file system,
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| 79 | and 64 Mb for a version 1 file system. Alas the 8086
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| 80 | .I fsck
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| 81 | runs out of memory on a V2 file system larger than 128 Mb, so for the 8086
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| 82 | version of
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| 83 | \s-1MINIX 3\s-1
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| 84 | you have to limit yourself to file systems of that size.
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| 85 | .SH "SEE ALSO"
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| 86 | .BR mkproto (1),
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| 87 | .BR fsck (1),
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| 88 | .BR mount (1).
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