fd543f2759
-A Display the apparent size instead of the disk usage. This can be
helpful when operating on compressed volumes or sparse files.
-B blocksize
Calculate block counts in blocksize byte blocks. This is differ-
ent from the -k, -m options or setting BLOCKSIZE and gives an
estimate of how much space the examined file hierachy would
require on a filesystem with the given blocksize. Unless in -A
mode, blocksize is rounded up to the next multiple of 512.
The former is similar to GNU's du(1) --apparent-size. The latter is
different from what GNU's du(1) -B does, which is equivalent to setting
BLOCKSIZE in our implementation and is rather pointless as it doesn't add
any real value (i.e. you can achieve the same with a simple awk-script).
No change in the normal output or processing.
Reviewed by: keramida@, Peter French
Otherwise silience from: freebsd-hackers@
184 lines
5.1 KiB
Groff
184 lines
5.1 KiB
Groff
.\" Copyright (c) 1990, 1993
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed by the University of
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.\" California, Berkeley and its contributors.
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.\" 4. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" @(#)du.1 8.2 (Berkeley) 4/1/94
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.\" $FreeBSD$
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.\"
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.Dd November 6, 2008
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.Dt DU 1
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.Os
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.Sh NAME
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.Nm du
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.Nd display disk usage statistics
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.Sh SYNOPSIS
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.Nm
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.Op Fl A
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.Op Fl H | L | P
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.Op Fl a | s | d Ar depth
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.Op Fl c
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.Op Fl l
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.Op Fl h | k | m | B Ar blocksize
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.Op Fl n
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.Op Fl x
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.Op Fl I Ar mask
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.Op Ar
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.Sh DESCRIPTION
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The
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.Nm
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utility displays the file system block usage for each file argument
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and for each directory in the file hierarchy rooted in each directory
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argument.
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If no file is specified, the block usage of the hierarchy rooted in
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the current directory is displayed.
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.Pp
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The options are as follows:
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.Bl -tag -width indent
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.It Fl A
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Display the apparent size instead of the disk usage.
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This can be helpful when operating on compressed volumes or sparse files.
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.It Fl B Ar blocksize
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Calculate block counts in
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.Ar blocksize
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byte blocks.
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This is different from the
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.Fl k, m
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options or setting
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.Ev BLOCKSIZE
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and gives an estimate of how much space the examined file hierachy would
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require on a filesystem with the given
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.Ar blocksize .
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Unless in
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.Fl A
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mode,
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.Ar blocksize
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is rounded up to the next multiple of 512.
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.It Fl H
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Symbolic links on the command line are followed, symbolic links in file
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hierarchies are not followed.
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.It Fl L
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Symbolic links on the command line and in file hierarchies are followed.
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.It Fl I Ar mask
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Ignore files and directories matching the specified
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.Ar mask .
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.It Fl P
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No symbolic links are followed.
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This is the default.
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.It Fl a
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Display an entry for each file in a file hierarchy.
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.It Fl h
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"Human-readable" output.
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Use unit suffixes: Byte, Kilobyte, Megabyte,
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Gigabyte, Terabyte and Petabyte.
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.It Fl r
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Generate messages about directories that cannot be read, files
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that cannot be opened, and so on.
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This is the default case.
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This option exists solely for conformance with
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.St -xpg4 .
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.It Fl s
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Display an entry for each specified file.
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(Equivalent to
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.Fl d Li 0 )
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.It Fl d Ar depth
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Display an entry for all files and directories
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.Ar depth
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directories deep.
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.It Fl c
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Display a grand total.
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.It Fl k
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Display block counts in 1024-byte (1-Kbyte) blocks.
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.It Fl l
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If a file has multiple hard links, count its size many times.
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The default behavior of
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.Nm
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is to count files with multiple hard links only once.
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When the
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.Fl l
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option is specified, the hard link checks are disabled, and these files
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are counted (and displayed) as many times as they are found.
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.It Fl m
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Display block counts in 1048576-byte (1-Mbyte) blocks.
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.It Fl n
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Ignore files and directories with user
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.Dq nodump
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flag
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.Pq Dv UF_NODUMP
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set.
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.It Fl x
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File system mount points are not traversed.
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.El
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.Pp
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The
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.Nm
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utility counts the storage used by symbolic links and not the files they
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reference unless the
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.Fl H
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or
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.Fl L
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option is specified.
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If either the
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.Fl H
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or
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.Fl L
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options are specified, storage used by any symbolic links which are
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followed is not counted or displayed.
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.Sh ENVIRONMENT
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.Bl -tag -width BLOCKSIZE
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.It Ev BLOCKSIZE
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If the environment variable
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.Ev BLOCKSIZE
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is set, and the
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.Fl k, m
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or
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.Fl h
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options are not specified, the block counts will be displayed in units of
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that block size.
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If
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.Ev BLOCKSIZE
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is not set, and the
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.Fl k, m
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or
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.Fl h
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options are not specified, the block counts will be displayed in 512-byte
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blocks.
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.El
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.Sh SEE ALSO
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.Xr df 1 ,
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.Xr chflags 2 ,
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.Xr fts 3 ,
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.Xr symlink 7 ,
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.Xr quot 8
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.Sh HISTORY
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A
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.Nm
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command appeared in
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.At v1 .
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