Annotation of src/usr.bin/du/du.1, Revision 1.6
1.6 ! deraadt 1: .\" $OpenBSD: du.1,v 1.5 1998/02/16 09:23:06 deraadt 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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35: .\" @(#)du.1 8.2 (Berkeley) 4/1/94
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1.4 millert 37: .Dd October 4, 1996
1.1 deraadt 38: .Dt DU 1
39: .Os
40: .Sh NAME
41: .Nm du
42: .Nd display disk usage statistics
43: .Sh SYNOPSIS
44: .Nm du
45: .Op Fl H | Fl L | Fl P
46: .Op Fl a | Fl s
1.5 deraadt 47: .Op Fl ckrx
1.1 deraadt 48: .Op Ar file ...
49: .Sh DESCRIPTION
50: The
51: .Nm du
52: utility displays the file system block usage for each file argument
53: and for each directory in the file hierarchy rooted in each directory
54: argument.
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
60: .It Fl H
61: Symbolic links on the command line are followed.
62: (Symbolic links encountered in the tree traversal are not followed.)
63: .It Fl L
64: All symbolic links are followed.
65: .It Fl P
66: No symbolic links are followed.
67: .It Fl a
68: Display an entry for each file in the file hierarchy.
69: .It Fl k
70: By default,
71: .Nm du
72: displays the number of blocks as returned by the
73: .Xr stat 2
74: system call, i.e. 512-byte blocks.
75: If the
76: .Fl k
77: flag is specified, the number displayed is the number of 1024-byte
78: blocks.
79: Partial numbers of blocks are rounded up.
1.4 millert 80: .It Fl c
81: Display the grand total after all the arguments have been processed.
1.1 deraadt 82: .It Fl s
83: Display only the grand total for the specified files.
1.5 deraadt 84: .It Fl r
85: Generate messages about directories that cannot be read, files
86: that cannot be opened, and so on. This is the default case.
87: This option exists solely for conformance with
88: .St -xpg4 .
1.1 deraadt 89: .It Fl x
90: Filesystem mount points are not traversed.
91: .El
92: .Pp
93: .Nm Du
94: counts the storage used by symbolic links and not the files they
95: reference unless the
96: .Fl H
97: or
98: .Fl L
99: option is specified.
100: If either the
101: .Fl H
102: or
103: .Fl L
104: options are specified, storage used by any symbolic links which are
105: followed is not counted or displayed.
106: The
107: .Fl H ,
108: .Fl L
109: and
110: .Fl P
111: options override each other and the command's actions are determined
112: by the last one specified.
113: .Pp
114: Files having multiple hard links are counted (and displayed) a single
115: time per
116: .Nm du
117: execution.
1.6 ! deraadt 118: .Sh ENVIRONMENT
1.1 deraadt 119: .Bl -tag -width BLOCKSIZE
120: .It Ev BLOCKSIZE
1.2 deraadt 121: If the environment variable
1.1 deraadt 122: .Ev BLOCKSIZE
123: is set, and the
124: .Fl k
125: option is not specified, the block counts will be displayed in units of that
126: size block.
127: .El
128: .Sh SEE ALSO
129: .Xr df 1 ,
130: .Xr fts 3 ,
131: .Xr symlink 7 ,
132: .Xr quot 8
133: .Sh HISTORY
134: A
135: .Nm du
136: command appeared in
137: .At v6 .