mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-22 11:17:19 +00:00
136 lines
4.6 KiB
Groff
136 lines
4.6 KiB
Groff
.\"
|
|
.\" Copyright (c) 1995, 1996 Joerg Wunsch
|
|
.\"
|
|
.\" All rights reserved.
|
|
.\"
|
|
.\" This program is free software.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY EXPRESS OR
|
|
.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|
.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
.\" IN NO EVENT SHALL THE DEVELOPERS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|
.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
.\"
|
|
.\" $Id$
|
|
.\"
|
|
.Dd November 5, 1995
|
|
.Os
|
|
.Dt MKDOSFS 1
|
|
.Sh NAME
|
|
.Nm mkdosfs
|
|
.Nd create an MS-DOS (FAT) file system
|
|
.Sh SYNOPSIS
|
|
.Nm mkdosfs
|
|
.Bq Fl f Ar capacity
|
|
.Bq Fl L Ar vollabel
|
|
.Ar device
|
|
.Sh DESCRIPTION
|
|
.Nm Mkdosfs
|
|
establishes a file system structure on
|
|
.Ar device
|
|
that is understood by
|
|
.Xr mount_msdos
|
|
and some ancient program loader.
|
|
.Ar Device
|
|
will typically be the character device node for a floppy disk drive,
|
|
.Pq e.\ g. Pa /dev/rfd0 ,
|
|
although any existing writable file or device is acceptable. In case
|
|
of a regular file it is treated as a dumped image of an MS-DOS file
|
|
system; only the file system structure will be written to it, and it
|
|
won't be truncated.
|
|
.Pp
|
|
The options are as follows:
|
|
.Bl -tag -width 10n -offset indent
|
|
.It Fl f Ar capacity
|
|
Use defaults for a typical file system with
|
|
.Ar capacity
|
|
kilobytes. Currently, the values 360, 720, 1200, and 1440 are
|
|
recognized.
|
|
.Pp
|
|
If this option is not specified,
|
|
.Nm
|
|
attempts to determine the size of the
|
|
.Ar device .
|
|
This is not reliably possible in all cases, but is believed to work
|
|
for the more common situations.
|
|
.It Fl L Ar vollabel
|
|
Use
|
|
.Ar vollabel
|
|
to describe the file system, instead of the default
|
|
.Ql 4.4BSD .
|
|
.El
|
|
.Pp
|
|
The file system structure consists of three major areas:
|
|
.Bl -tag -width 10n -offset indent
|
|
.It Em The bootsector
|
|
This is the very first (512-byte) sector. It contains executable
|
|
code that normally would bootstrap an operating system when loaded.
|
|
Since it's beyond the scope of
|
|
.Nm
|
|
to install an operating system on the medium, this boot code will only
|
|
print a message that the disk does not contain a bootable system.
|
|
Inside the
|
|
.Em bootsector
|
|
is the
|
|
.Em BIOS parameter block (BPB) ,
|
|
where several statistical parameters of the file system are being
|
|
held.
|
|
.It Em The file allocation table(s) (FAT)
|
|
Sectors next to the
|
|
.Em bootsector
|
|
hold the FAT, which is used to register file system allocation,
|
|
as well as keeping pointer chains for the chunks constituting
|
|
one file. There are usually two identical copies of the FAT.
|
|
.It Em The root directory
|
|
The final structure is the root directory for this medium. It is
|
|
merely a space reservation, padded with 0's, and unfortunately fixed
|
|
in its size.
|
|
.Nm mkdosfs
|
|
initializes it to empty, and enters a volume label record into the
|
|
very first directory slot.
|
|
.Sh DIAGNOSTICS
|
|
An exit status of 0 is returned upon successful operation. Exit status
|
|
1 is returned on any errors during file system creation, and an exit status
|
|
of 2 reflects invalid arguments given to the program (along with an
|
|
appropriate information written to diagnostic output).
|
|
.Sh SEE ALSO
|
|
.Xr fdformat 1 ,
|
|
.Xr mount_msdos 8 ,
|
|
.Xr newfs 8 .
|
|
.Sh BUGS
|
|
There is currently no way to specify obscure file system parameters.
|
|
Thus, only media with one of the supported capacity values can be
|
|
formatted. For the same reason, it's not possible to handle hard disk
|
|
partitions. More options should be added to allow this. More entries
|
|
should be added to the table of known formats, too.
|
|
.Pp
|
|
No attempt is made to handle media defects. However, this is beyond
|
|
the scope of
|
|
.Nm mkdosfs
|
|
and should better be handled by the (nonexistent)
|
|
.Xr dosfsck 1
|
|
utility.
|
|
.Sh HISTORY
|
|
.Nm Mkdosfs
|
|
appeared in
|
|
.Fx 2.2 .
|
|
.Sh AUTHOR
|
|
The program has been contributed by
|
|
.if n Joerg Wunsch,
|
|
.if t J\(:org Wunsch,
|
|
Dresden.
|