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Annotation of src/usr.bin/du/du.1, Revision 1.7

1.7     ! millert     1: .\"    $OpenBSD: du.1,v 1.6 1998/05/13 10:33:26 deraadt 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.
                      6: .\"
                      7: .\" Redistribution and use in source and binary forms, with or without
                      8: .\" modification, are permitted provided that the following conditions
                      9: .\" are met:
                     10: .\" 1. Redistributions of source code must retain the above copyright
                     11: .\"    notice, this list of conditions and the following disclaimer.
                     12: .\" 2. Redistributions in binary form must reproduce the above copyright
                     13: .\"    notice, this list of conditions and the following disclaimer in the
                     14: .\"    documentation and/or other materials provided with the distribution.
                     15: .\" 3. All advertising materials mentioning features or use of this software
                     16: .\"    must display the following acknowledgement:
                     17: .\"    This product includes software developed by the University of
                     18: .\"    California, Berkeley and its contributors.
                     19: .\" 4. Neither the name of the University nor the names of its contributors
                     20: .\"    may be used to endorse or promote products derived from this software
                     21: .\"    without specific prior written permission.
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                     23: .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     24: .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     25: .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     26: .\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     27: .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     28: .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     29: .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     30: .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     31: .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     32: .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     33: .\" SUCH DAMAGE.
                     34: .\"
                     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
                     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
1.7     ! millert    54: argument.  Note that the system block usage is usually greater than
        !            55: the actual size of the file.
1.1       deraadt    56: If no file is specified, the block usage of the hierarchy rooted in
                     57: the current directory is displayed.
                     58: .Pp
                     59: The options are as follows:
                     60: .Bl -tag -width Ds
                     61: .It Fl H
                     62: Symbolic links on the command line are followed.
                     63: (Symbolic links encountered in the tree traversal are not followed.)
                     64: .It Fl L
                     65: All symbolic links are followed.
                     66: .It Fl P
                     67: No symbolic links are followed.
                     68: .It Fl a
                     69: Display an entry for each file in the file hierarchy.
                     70: .It Fl k
                     71: By default,
                     72: .Nm du
                     73: displays the number of blocks as returned by the
                     74: .Xr stat  2
                     75: system call, i.e. 512-byte blocks.
                     76: If the
                     77: .Fl k
                     78: flag is specified, the number displayed is the number of 1024-byte
                     79: blocks.
                     80: Partial numbers of blocks are rounded up.
1.4       millert    81: .It Fl c
                     82: Display the grand total after all the arguments have been processed.
1.1       deraadt    83: .It Fl s
                     84: Display only the grand total for the specified files.
1.5       deraadt    85: .It Fl r
                     86: Generate messages about directories that cannot be read, files
                     87: that cannot be opened, and so on.  This is the default case.
                     88: This option exists solely for conformance with
                     89: .St -xpg4 .
1.1       deraadt    90: .It Fl x
                     91: Filesystem mount points are not traversed.
                     92: .El
                     93: .Pp
                     94: .Nm Du
                     95: counts the storage used by symbolic links and not the files they
                     96: reference unless the
                     97: .Fl H
                     98: or
                     99: .Fl L
                    100: option is specified.
                    101: If either the
                    102: .Fl H
                    103: or
                    104: .Fl L
                    105: options are specified, storage used by any symbolic links which are
                    106: followed is not counted or displayed.
                    107: The
                    108: .Fl H ,
                    109: .Fl L
                    110: and
                    111: .Fl P
                    112: options override each other and the command's actions are determined
                    113: by the last one specified.
                    114: .Pp
                    115: Files having multiple hard links are counted (and displayed) a single
                    116: time per
                    117: .Nm du
                    118: execution.
1.6       deraadt   119: .Sh ENVIRONMENT
1.1       deraadt   120: .Bl -tag -width BLOCKSIZE
                    121: .It Ev BLOCKSIZE
1.2       deraadt   122: If the environment variable
1.1       deraadt   123: .Ev BLOCKSIZE
                    124: is set, and the
                    125: .Fl k
                    126: option is not specified, the block counts will be displayed in units of that
                    127: size block.
                    128: .El
                    129: .Sh SEE ALSO
                    130: .Xr df 1 ,
                    131: .Xr fts 3 ,
                    132: .Xr symlink 7 ,
                    133: .Xr quot 8
                    134: .Sh HISTORY
                    135: A
                    136: .Nm du
                    137: command appeared in
                    138: .At v6 .