Annotation of src/usr.bin/du/du.1, Revision 1.38
1.38 ! schwarze 1: .\" $OpenBSD: du.1,v 1.37 2020/01/30 17:54:30 schwarze 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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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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1.37 schwarze 33: .Dd $Mdocdate: January 30 2020 $
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
1.33 schwarze 41: .Op Fl achkrsx
1.34 jmc 42: .Op Fl H | L | P
1.32 schwarze 43: .Op Fl d Ar depth
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
1.32 schwarze 61: Display entries for files in addition to entries for directories.
1.19 jmc 62: .It Fl c
63: Display the grand total after all the arguments have been processed.
1.32 schwarze 64: .It Fl d Ar depth
65: Do not display entries for files and directories more than
66: .Ar depth
67: levels deep;
68: .Fl d Cm 0
69: has the same effect as
70: .Fl s .
71: Overrides earlier
72: .Fl d
73: and
74: .Fl s
75: options.
1.1 deraadt 76: .It Fl H
77: Symbolic links on the command line are followed.
1.29 jmc 78: Symbolic links encountered in the tree traversal are not followed.
1.19 jmc 79: .It Fl h
1.25 jmc 80: "Human-readable" output.
81: Use unit suffixes: Byte, Kilobyte, Megabyte,
82: Gigabyte, Terabyte, Petabyte, Exabyte in order to reduce the number of
83: digits to four or less.
1.1 deraadt 84: .It Fl k
1.25 jmc 85: By default, all sizes are reported in 512-byte block counts.
86: The
1.1 deraadt 87: .Fl k
1.25 jmc 88: option causes the numbers to be reported in kilobyte counts.
1.19 jmc 89: .It Fl L
90: All symbolic links are followed.
91: .It Fl P
92: No symbolic links are followed.
1.5 deraadt 93: .It Fl r
94: Generate messages about directories that cannot be read, files
1.12 aaron 95: that cannot be opened, and so on.
1.23 jmc 96: This is the default.
1.19 jmc 97: .It Fl s
1.32 schwarze 98: Display only the total for each of the specified files and directories.
99: Overrides earlier
100: .Fl d
101: options.
1.1 deraadt 102: .It Fl x
1.11 aaron 103: File system mount points are not traversed.
1.1 deraadt 104: .El
1.25 jmc 105: .Pp
106: It is not an error to specify more than one of
107: the mutually exclusive options
108: .Fl h
109: and
110: .Fl k .
111: Where more than one of these options is specified,
112: the last option given overrides the others.
1.1 deraadt 113: .Pp
1.10 aaron 114: .Nm
1.1 deraadt 115: counts the storage used by symbolic links and not the files they
116: reference unless the
117: .Fl H
1.9 aaron 118: or
119: .Fl L
120: option is specified.
1.1 deraadt 121: If either the
122: .Fl H
123: or
124: .Fl L
125: options are specified, storage used by any symbolic links which are
126: followed is not counted or displayed.
127: The
128: .Fl H ,
1.12 aaron 129: .Fl L ,
1.1 deraadt 130: and
131: .Fl P
132: options override each other and the command's actions are determined
133: by the last one specified.
134: .Pp
135: Files having multiple hard links are counted (and displayed) a single
136: time per
1.10 aaron 137: .Nm
1.1 deraadt 138: execution.
1.6 deraadt 139: .Sh ENVIRONMENT
1.1 deraadt 140: .Bl -tag -width BLOCKSIZE
141: .It Ev BLOCKSIZE
1.11 aaron 142: Block counts will be displayed in units of this size block, unless the
1.1 deraadt 143: .Fl k
1.16 pjanzen 144: or
145: .Fl h
146: option is specified.
1.1 deraadt 147: .El
1.28 jmc 148: .Sh EXIT STATUS
149: .Ex -std du
1.36 schwarze 150: .Sh EXAMPLES
151: Display a summary of files and folders in the current directory,
152: sorted by size:
153: .Pp
1.38 ! schwarze 154: .Dl $ du -had 1 | sort -h
1.1 deraadt 155: .Sh SEE ALSO
156: .Xr df 1 ,
1.35 deraadt 157: .Xr fts_open 3 ,
1.1 deraadt 158: .Xr symlink 7 ,
159: .Xr quot 8
1.20 jmc 160: .Sh STANDARDS
161: The
162: .Nm
163: utility is compliant with the
1.24 jmc 164: .St -p1003.1-2008
1.20 jmc 165: specification.
166: .Pp
167: The flags
1.32 schwarze 168: .Op Fl cdhP ,
1.30 jmc 169: as well as the
170: .Ev BLOCKSIZE
171: environment variable,
1.20 jmc 172: are extensions to that specification.
1.23 jmc 173: .Pp
174: The flag
175: .Op Fl r
1.31 schwarze 176: is accepted but ignored, for compatibility with systems implementing
177: the obsolete
178: .St -xcu5
179: standard.
1.1 deraadt 180: .Sh HISTORY
1.32 schwarze 181: The
1.10 aaron 182: .Nm
1.32 schwarze 183: utility and its
184: .Fl a
185: and
186: .Fl s
187: options first appeared in
188: .At v1 .
189: .Pp
190: The
191: .Fl r
192: option first appeared in
193: .At III
194: and is available since
195: .Ox 2.3 .
196: The
197: .Fl k
198: and
199: .Fl x
200: options first appeared in
201: .Bx 4.3 Reno
202: and
203: .Fl H
204: in
205: .Bx 4.4 .
206: The
207: .Fl c
208: and
209: .Fl L
210: options first appeared in the GNU fileutils;
211: .Fl L
212: and
213: .Fl P
214: are available since
215: .Bx 4.4 Lite1 ,
216: .Fl c
217: since
218: .Ox 2.1 .
219: The
220: .Fl d
221: option first appeared in
222: .Fx 2.2
223: and is available since
224: .Ox 5.7 ,
225: .Fl h
226: first appeared in
227: .Fx 4.0
228: and is available since
229: .Ox 2.9 .
1.31 schwarze 230: .Sh AUTHORS
231: .An -nosplit
232: This version of
233: .Nm
234: was written by
235: .An Chris Newcomb
236: for
237: .Bx 4.3 Reno
238: in 1989 and incorporates later contributions from
239: .An Elan Amir ,
240: .An Keith Bostic ,
241: .An Luke Mewburn ,
242: .An Matt Bing ,
243: and
244: .An Can Erkin Acar Aq Mt canacar@openbsd.org .
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