Annotation of src/usr.bin/du/du.1, Revision 1.24
1.24 ! jmc 1: .\" $OpenBSD: du.1,v 1.23 2007/11/13 13:49:50 jmc Exp $
1.4 millert 2: .\" $NetBSD: du.1,v 1.6 1996/10/18 07:20:31 thorpej Exp $
1.1 deraadt 3: .\"
4: .\" Copyright (c) 1990, 1993
5: .\" The Regents of the University of California. All rights reserved.
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8: .\" modification, are permitted provided that the following conditions
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1.18 millert 15: .\" 3. Neither the name of the University nor the names of its contributors
1.1 deraadt 16: .\" may be used to endorse or promote products derived from this software
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31: .\" @(#)du.1 8.2 (Berkeley) 4/1/94
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1.24 ! jmc 33: .Dd $Mdocdate: November 13 2007 $
1.1 deraadt 34: .Dt DU 1
35: .Os
36: .Sh NAME
37: .Nm du
38: .Nd display disk usage statistics
39: .Sh SYNOPSIS
40: .Nm du
1.19 jmc 41: .Op Fl a | s
1.14 pjanzen 42: .Op Fl chkrx
1.19 jmc 43: .Op Fl H | L | P
1.1 deraadt 44: .Op Ar file ...
45: .Sh DESCRIPTION
46: The
1.10 aaron 47: .Nm
1.8 aaron 48: utility displays the file system block usage for each
49: .Ar file
50: argument
1.1 deraadt 51: and for each directory in the file hierarchy rooted in each directory
1.12 aaron 52: argument.
53: Note that the system block usage is usually greater than
1.7 millert 54: the actual size of the file.
1.1 deraadt 55: If no file is specified, the block usage of the hierarchy rooted in
56: the current directory is displayed.
57: .Pp
58: The options are as follows:
59: .Bl -tag -width Ds
1.19 jmc 60: .It Fl a
61: Display an entry for each file in the file hierarchy.
62: .It Fl c
63: Display the grand total after all the arguments have been processed.
1.1 deraadt 64: .It Fl H
65: Symbolic links on the command line are followed.
66: (Symbolic links encountered in the tree traversal are not followed.)
1.19 jmc 67: .It Fl h
68: Display numbers in a human readable form.
69: Use unit suffixes: Byte, Kilobyte, Megabyte, Gigabyte, Terabyte in order to
70: reduce the number of digits to four or less.
71: This overrides the
72: .Fl k
73: option.
1.1 deraadt 74: .It Fl k
75: By default,
1.10 aaron 76: .Nm
1.1 deraadt 77: displays the number of blocks as returned by the
1.10 aaron 78: .Xr stat 2
1.13 aaron 79: system call, i.e., 512-byte blocks.
1.1 deraadt 80: If the
81: .Fl k
82: flag is specified, the number displayed is the number of 1024-byte
83: blocks.
84: Partial numbers of blocks are rounded up.
1.19 jmc 85: .It Fl L
86: All symbolic links are followed.
87: .It Fl P
88: No symbolic links are followed.
1.5 deraadt 89: .It Fl r
90: Generate messages about directories that cannot be read, files
1.12 aaron 91: that cannot be opened, and so on.
1.23 jmc 92: This is the default.
1.19 jmc 93: .It Fl s
94: Display only the grand total for the specified files.
1.1 deraadt 95: .It Fl x
1.11 aaron 96: File system mount points are not traversed.
1.1 deraadt 97: .El
98: .Pp
1.10 aaron 99: .Nm
1.1 deraadt 100: counts the storage used by symbolic links and not the files they
101: reference unless the
102: .Fl H
1.9 aaron 103: or
104: .Fl L
105: option is specified.
1.1 deraadt 106: If either the
107: .Fl H
108: or
109: .Fl L
110: options are specified, storage used by any symbolic links which are
111: followed is not counted or displayed.
112: The
113: .Fl H ,
1.12 aaron 114: .Fl L ,
1.1 deraadt 115: and
116: .Fl P
117: options override each other and the command's actions are determined
118: by the last one specified.
119: .Pp
120: Files having multiple hard links are counted (and displayed) a single
121: time per
1.10 aaron 122: .Nm
1.1 deraadt 123: execution.
1.6 deraadt 124: .Sh ENVIRONMENT
1.1 deraadt 125: .Bl -tag -width BLOCKSIZE
126: .It Ev BLOCKSIZE
1.11 aaron 127: Block counts will be displayed in units of this size block, unless the
1.1 deraadt 128: .Fl k
1.16 pjanzen 129: or
130: .Fl h
131: option is specified.
1.1 deraadt 132: .El
133: .Sh SEE ALSO
134: .Xr df 1 ,
135: .Xr fts 3 ,
136: .Xr symlink 7 ,
137: .Xr quot 8
1.20 jmc 138: .Sh STANDARDS
139: The
140: .Nm
141: utility is compliant with the
1.24 ! jmc 142: .St -p1003.1-2008
1.20 jmc 143: specification.
144: .Pp
145: The flags
1.22 jmc 146: .Op Fl chPr
1.20 jmc 147: are extensions to that specification.
1.23 jmc 148: .Pp
149: The flag
150: .Op Fl r
151: exists solely for conformance with
152: .St -xpg4 .
1.1 deraadt 153: .Sh HISTORY
154: A
1.10 aaron 155: .Nm
1.1 deraadt 156: command appeared in
1.17 mickey 157: .At v3 .
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