Annotation of src/usr.bin/du/du.1, Revision 1.28
1.28 ! jmc 1: .\" $OpenBSD: du.1,v 1.27 2010/07/21 20:02:29 jmc Exp $
1.4 millert 2: .\" $NetBSD: du.1,v 1.6 1996/10/18 07:20:31 thorpej Exp $
1.1 deraadt 3: .\"
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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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1.28 ! jmc 33: .Dd $Mdocdate: July 21 2010 $
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
1.26 sobrado 44: .Op Ar
1.1 deraadt 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
1.25 jmc 68: "Human-readable" output.
69: Use unit suffixes: Byte, Kilobyte, Megabyte,
70: Gigabyte, Terabyte, Petabyte, Exabyte in order to reduce the number of
71: digits to four or less.
1.1 deraadt 72: .It Fl k
1.25 jmc 73: By default, all sizes are reported in 512-byte block counts.
74: The
1.1 deraadt 75: .Fl k
1.25 jmc 76: option causes the numbers to be reported in kilobyte counts.
1.19 jmc 77: .It Fl L
78: All symbolic links are followed.
79: .It Fl P
80: No symbolic links are followed.
1.5 deraadt 81: .It Fl r
82: Generate messages about directories that cannot be read, files
1.12 aaron 83: that cannot be opened, and so on.
1.23 jmc 84: This is the default.
1.19 jmc 85: .It Fl s
86: Display only the grand total for the specified files.
1.1 deraadt 87: .It Fl x
1.11 aaron 88: File system mount points are not traversed.
1.1 deraadt 89: .El
1.25 jmc 90: .Pp
91: It is not an error to specify more than one of
92: the mutually exclusive options
93: .Fl h
94: and
95: .Fl k .
96: Where more than one of these options is specified,
97: the last option given overrides the others.
1.1 deraadt 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
1.28 ! jmc 133: .Sh EXIT STATUS
! 134: .Ex -std du
1.1 deraadt 135: .Sh SEE ALSO
136: .Xr df 1 ,
137: .Xr fts 3 ,
138: .Xr symlink 7 ,
139: .Xr quot 8
1.20 jmc 140: .Sh STANDARDS
141: The
142: .Nm
143: utility is compliant with the
1.24 jmc 144: .St -p1003.1-2008
1.20 jmc 145: specification.
146: .Pp
147: The flags
1.22 jmc 148: .Op Fl chPr
1.20 jmc 149: are extensions to that specification.
1.23 jmc 150: .Pp
151: The flag
152: .Op Fl r
153: exists solely for conformance with
154: .St -xpg4 .
1.1 deraadt 155: .Sh HISTORY
156: A
1.10 aaron 157: .Nm
1.1 deraadt 158: command appeared in
1.17 mickey 159: .At v3 .
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