Annotation of src/usr.bin/du/du.1, Revision 1.12
1.12 ! aaron 1: .\" $OpenBSD: du.1,v 1.11 2000/03/05 20:09:22 aaron 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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35: .\" @(#)du.1 8.2 (Berkeley) 4/1/94
36: .\"
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
1.10 aaron 51: .Nm
1.8 aaron 52: utility displays the file system block usage for each
53: .Ar file
54: argument
1.1 deraadt 55: and for each directory in the file hierarchy rooted in each directory
1.12 ! aaron 56: argument.
! 57: Note that the system block usage is usually greater than
1.7 millert 58: the actual size of the file.
1.1 deraadt 59: If no file is specified, the block usage of the hierarchy rooted in
60: the current directory is displayed.
61: .Pp
62: The options are as follows:
63: .Bl -tag -width Ds
64: .It Fl H
65: Symbolic links on the command line are followed.
66: (Symbolic links encountered in the tree traversal are not followed.)
67: .It Fl L
68: All symbolic links are followed.
69: .It Fl P
70: No symbolic links are followed.
71: .It Fl a
72: Display an entry for each file in the file hierarchy.
73: .It Fl k
74: By default,
1.10 aaron 75: .Nm
1.1 deraadt 76: displays the number of blocks as returned by the
1.10 aaron 77: .Xr stat 2
1.1 deraadt 78: system call, i.e. 512-byte blocks.
79: If the
80: .Fl k
81: flag is specified, the number displayed is the number of 1024-byte
82: blocks.
83: Partial numbers of blocks are rounded up.
1.4 millert 84: .It Fl c
85: Display the grand total after all the arguments have been processed.
1.1 deraadt 86: .It Fl s
87: Display only the grand total for the specified files.
1.5 deraadt 88: .It Fl r
89: Generate messages about directories that cannot be read, files
1.12 ! aaron 90: that cannot be opened, and so on.
! 91: This is the default case.
1.5 deraadt 92: This option exists solely for conformance with
93: .St -xpg4 .
1.1 deraadt 94: .It Fl x
1.11 aaron 95: File system mount points are not traversed.
1.1 deraadt 96: .El
97: .Pp
1.10 aaron 98: .Nm
1.1 deraadt 99: counts the storage used by symbolic links and not the files they
100: reference unless the
101: .Fl H
1.9 aaron 102: or
103: .Fl L
104: option is specified.
1.1 deraadt 105: If either the
106: .Fl H
107: or
108: .Fl L
109: options are specified, storage used by any symbolic links which are
110: followed is not counted or displayed.
111: The
112: .Fl H ,
1.12 ! aaron 113: .Fl L ,
1.1 deraadt 114: and
115: .Fl P
116: options override each other and the command's actions are determined
117: by the last one specified.
118: .Pp
119: Files having multiple hard links are counted (and displayed) a single
120: time per
1.10 aaron 121: .Nm
1.1 deraadt 122: execution.
1.6 deraadt 123: .Sh ENVIRONMENT
1.1 deraadt 124: .Bl -tag -width BLOCKSIZE
1.11 aaron 125: The following environment variables affect the execution of
126: .Nm du :
127: .Pp
1.1 deraadt 128: .It Ev BLOCKSIZE
1.11 aaron 129: Block counts will be displayed in units of this size block, unless the
1.1 deraadt 130: .Fl k
1.11 aaron 131: option is also 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
138: .Sh HISTORY
139: A
1.10 aaron 140: .Nm
1.1 deraadt 141: command appeared in
142: .At v6 .
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