7967 Want apparent size option for du(1)
Reviewed by: Yuri Pankov <yuri.pankov@nexenta.com>
Reviewed by: Toomas Soome <tsoome@me.com>
Reviewed by: Peter Tribble <peter.tribble@gmail.com>
Reviewed by: Dan McDonald <danmcd@omniti.com>

@@ -1,54 +1,51 @@
 '\" te
 .\" Copyright (c) 1992, X/Open Company Limited. All Rights Reserved.
 .\" Portions Copyright (c) 2007, Sun Microsystems, Inc. All Rights Reserved.
+.\" Copyright 2017 OmniTI Computer Consulting, Inc. All rights reserved.
 .\" Sun Microsystems, Inc. gratefully acknowledges The Open Group for permission to reproduce portions of its copyrighted documentation. Original documentation from The Open Group can be obtained online at
 .\" http://www.opengroup.org/bookstore/.
 .\" The Institute of Electrical and Electronics Engineers and The Open Group, have given us permission to reprint portions of their documentation. In the following statement, the phrase "this text" refers to portions of the system documentation. Portions of this text are reprinted and reproduced in electronic form in the Sun OS Reference Manual, from IEEE Std 1003.1, 2004 Edition, Standard for Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2004 by the Institute of Electrical and Electronics Engineers, Inc and The Open Group. In the event of any discrepancy between these versions and the original IEEE and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can be obtained online at http://www.opengroup.org/unix/online.html.
 .\"  This notice shall appear on any product containing this material.
 .\" The contents of this file are subject to the terms of the Common Development and Distribution License (the "License").  You may not use this file except in compliance with the License.
 .\" You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE or http://www.opensolaris.org/os/licensing.  See the License for the specific language governing permissions and limitations under the License.
 .\" When distributing Covered Code, include this CDDL HEADER in each file and include the License file at usr/src/OPENSOLARIS.LICENSE.  If applicable, add the following below this CDDL HEADER, with the fields enclosed by brackets "[]" replaced with your own identifying information: Portions Copyright [yyyy] [name of copyright owner]
-.TH DU 1 "Feb 6, 2007"
+.TH DU 1 "March 14, 2017"
 .SH NAME
 du \- summarize disk usage
 .SH SYNOPSIS
 .LP
 .nf
-\fB/usr/bin/du\fR [\fB-dorx\fR] [\fB-a\fR | \fB-s\fR] [\fB-h\fR | \fB-k\fR | \fB-m\fR] [\fB-H\fR | \fB-L\fR]
+\fB/usr/bin/du\fR [\fB-Adorx\fR] [\fB-a\fR | \fB-s\fR] [\fB-h\fR | \fB-k\fR | \fB-m\fR] [\fB-H\fR | \fB-L\fR]
      [\fIfile\fR ...]
 .fi
 
 .LP
 .nf
-\fB/usr/xpg4/bin/du\fR [\fB-dorx\fR] [\fB-a\fR | \fB-s\fR] [\fB-h\fR | \fB-k\fR | \fB-m\fR] [\fB-H\fR | \fB-L\fR]
+\fB/usr/xpg4/bin/du\fR [\fB-Adorx\fR] [\fB-a\fR | \fB-s\fR] [\fB-h\fR | \fB-k\fR | \fB-m\fR] [\fB-H\fR | \fB-L\fR]
      [\fIfile\fR ...]
 .fi
 
 .SH DESCRIPTION
-.sp
 .LP
 The \fBdu\fR utility writes to standard output the size of the file space
 allocated to, and the size of the file space allocated to each subdirectory of,
 the file hierarchy rooted in each of the specified files. The size of the file
 space allocated to a file of type directory is defined as the sum total of
 space allocated to all files in the file hierarchy rooted in the directory plus
 the space allocated to the directory itself. This sum will include the space
 allocated to any extended attributes encountered.
-.sp
 .LP
 Files with multiple links will be counted and written for only one entry. The
 directory entry that is selected in the report is unspecified. By default, file
 sizes are written in 512-byte units, rounded up to the next 512-byte unit.
 .SS "/usr/xpg4/bin/du"
-.sp
 .LP
 When \fBdu\fR cannot obtain file attributes or read directories (see
 \fBstat\fR(2)), it will report an error condition and the final exit status
 will be affected.
 .SH OPTIONS
-.sp
 .LP
 The following options are supported for \fB/usr/bin/du\fR and
 \fB/usr/xpg4/bin/du\fR:
 .sp
 .ne 2

@@ -63,10 +60,21 @@
 .RE
 
 .sp
 .ne 2
 .na
+\fB\fB-A\fR\fR
+.ad
+.RS 6n
+Tally file size using the apparent size of the file instead of the disk blocks
+it occupies. This option is useful when operating on file systems which employ
+compression or in the presence of sparse files.
+.RE
+
+.sp
+.ne 2
+.na
 \fB\fB-d\fR\fR
 .ad
 .RS 6n
 Do not cross filesystem boundaries. For example, the command, \fBdu -d /\fR
 reports usage only on the root partition.

@@ -177,11 +185,10 @@
 .LP
 Specifying more than one of the options in the mutually exclusive set of
 options \fB-h\fR, \fB-k\fR, and \fB-m\fR is not considered an error.  The last
 option specified determines the output format.
 .SH OPERANDS
-.sp
 .LP
 The following operand is supported:
 .sp
 .ne 2
 .na

@@ -189,29 +196,24 @@
 .ad
 .RS 8n
 The path name of a file whose size is to be written. If no \fIfile\fR is
 specified, the current directory is used.
 .RE
-
 .SH OUTPUT
-.sp
 .LP
 The output from \fBdu\fR consists of the amount of the space allocated to a
 file and the name of the file.
 .SH USAGE
-.sp
 .LP
 See \fBlargefile\fR(5) for the description of the behavior of \fBdu\fR when
 encountering files greater than or equal to 2 Gbyte ( 2^31 bytes).
 .SH ENVIRONMENT VARIABLES
-.sp
 .LP
 See \fBenviron\fR(5) for descriptions of the following environment variables
 that affect the execution of \fBdu\fR: \fBLANG\fR, \fBLC_ALL\fR,
 \fBLC_CTYPE\fR, \fBLC_MESSAGES\fR, and \fBNLSPATH\fR.
 .SH EXIT STATUS
-.sp
 .LP
 The following exit values are returned:
 .sp
 .ne 2
 .na

@@ -218,28 +220,23 @@
 \fB\fB0\fR\fR
 .ad
 .RS 6n
 Successful completion.
 .RE
-
 .sp
 .ne 2
 .na
 \fB\fB>0\fR\fI\fR\fR
 .ad
 .RS 6n
 An error occurred.
 .RE
-
 .SH ATTRIBUTES
-.sp
 .LP
 See \fBattributes\fR(5) for descriptions of the following attributes:
 .SS "/usr/bin/du"
-.sp
 
-.sp
 .TS
 box;
 c | c
 l | l .
 ATTRIBUTE TYPE  ATTRIBUTE VALUE

@@ -248,13 +245,11 @@
 _
 Interface Stability     Stable
 .TE
 
 .SS "/usr/xpg4/bin/du"
-.sp
 
-.sp
 .TS
 box;
 c | c
 l | l .
 ATTRIBUTE TYPE  ATTRIBUTE VALUE

@@ -263,22 +258,20 @@
 _
 Interface Stability     Standard
 .TE
 
 .SH SEE ALSO
-.sp
 .LP
 \fBls\fR(1), \fBstat\fR(2), \fBattributes\fR(5), \fBenviron\fR(5),
 \fBfsattr\fR(5), \fBlargefile\fR(5), \fBstandards\fR(5)
-.sp
 .LP
 \fISystem Administration Guide: Basic Administration\fR
 .SH NOTES
-.sp
 .LP
 A file with two or more links is counted only once. If, however, there are
 links between files in different directories where the directories are on
 separate branches of the file system hierarchy, \fBdu\fR will count the excess
 files more than once.
-.sp
 .LP
-Files containing holes will result in an incorrect block count.
+Files containing holes will result in an incorrect block count. In this case,
+one may use the \fB-A\fR option to report file sizes by their apparent size
+instead.