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.\" $NetBSD: du.1,v 1.23 2012/05/14 21:14:14 wiz Exp $
.\"
.\" Copyright (c) 1990, 1993
.\" The Regents of the University of California. All rights reserved.
.\"
.\" 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.
.\" 3. Neither the name of the University nor the names of its contributors
.\" may be used to endorse or promote products derived from this software
.\" without specific prior written permission.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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.
.\"
.\" @(#)du.1 8.2 (Berkeley) 4/1/94
.\"
.Dd May 14, 2012
.Dt DU 1
.Os
.Sh NAME
.Nm du
.Nd display disk usage statistics
.Sh SYNOPSIS
.Nm
.Op Fl H | Fl L | Fl P
.Op Fl a | Fl d Ar depth | Fl s
.Op Fl cghikmnrx
.Op Ar file ...
.Sh DESCRIPTION
The
.Nm
utility displays the file system usage for each file argument
and for each directory in the file hierarchy rooted in each directory
argument.
If no file is specified, the block usage of the hierarchy rooted in
the current directory is displayed.
.Pp
The options are as follows:
.Bl -tag -width Ds
.It Fl H
Symbolic links on the command line are followed.
(Symbolic links encountered in the tree traversal are not followed.)
.It Fl L
All symbolic links are followed.
.It Fl P
No symbolic links are followed.
.It Fl a
Display an entry for each file in the file hierarchy.
.It Fl c
Display the grand total after all the arguments have been processed.
.It Fl d
Display an entry files and directories
.Ar depth
directories deep.
.It Fl g
If the
.Fl g
flag is specified, the number displayed is the number of gigabyte
(1024*1024*1024 bytes) blocks.
.It Fl h
If the
.Fl h
flag is specified, the numbers will be displayed in "human-readable"
format.
Use unit suffixes: B (Byte), K (Kilobyte), M (Megabyte), G (Gigabyte),
T (Terabyte) and P (Petabyte).
.It Fl i
Output inode usage instead of blocks.
All "human-readable" options are ignored.
.It Fl k
By default,
.Nm
displays the number of blocks as returned by the
.Xr stat 2
system call, i.e. 512-byte blocks.
If the
.Fl k
flag is specified, the number displayed is the number of kilobyte
(1024 bytes) blocks.
Partial numbers of blocks are rounded up.
.It Fl m
If the
.Fl m
flag is specified, the number displayed is the number of megabyte
(1024*1024 bytes) blocks.
.It Fl n
Ignore files and directories with user
.Qq nodump
flag
.Pq Dv UF_NODUMP
set.
.It Fl r
Generate warning messages about directories that cannot be read.
This is the default behaviour.
.It Fl s
Display only the grand total for the specified files.
.It Fl x
Filesystem mount points are not traversed.
.El
.Pp
.Nm
counts the storage used by symbolic links and not the files they
reference unless the
.Fl H
or
.Fl L
option is specified.
If either the
.Fl H
or
.Fl L
options are specified, storage used by any symbolic links which are
followed is not counted or displayed.
The
.Fl H ,
.Fl L
and
.Fl P
options override each other and the command's actions are determined
by the last one specified.
.Pp
Files having multiple hard links are counted (and displayed) a single
time per
.Nm
execution.
.Sh ENVIRONMENT
.Bl -tag -width BLOCKSIZE
.It Ev BLOCKSIZE
If the environment variable
.Ev BLOCKSIZE
is set, and the
.Fl g ,
.Fl h ,
.Fl k ,
and
.Fl m
options are not specified, the block counts will be displayed in units of that
size block.
.El
.Sh EXIT STATUS
.Ex -std
.Sh SEE ALSO
.Xr df 1 ,
.Xr chflags 2 ,
.Xr fts 3 ,
.Xr getbsize 3 ,
.Xr symlink 7 ,
.Xr quot 8
.Sh HISTORY
A
.Nm
command appeared in
.At v6 .
|
