projects / apple / file_cmds.git / blame
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1 | .\" $NetBSD: du.1,v 1.8 1998/02/15 17:08:17 kleink Exp $ |
| 2 | .\" | |
| 3 | .\" Copyright (c) 1990, 1993 | |
| 4 | .\" The Regents of the University of California. All rights reserved. | |
| 5 | .\" | |
| 6 | .\" Redistribution and use in source and binary forms, with or without | |
| 7 | .\" modification, are permitted provided that the following conditions | |
| 8 | .\" are met: | |
| 9 | .\" 1. Redistributions of source code must retain the above copyright | |
| 10 | .\" notice, this list of conditions and the following disclaimer. | |
| 11 | .\" 2. Redistributions in binary form must reproduce the above copyright | |
| 12 | .\" notice, this list of conditions and the following disclaimer in the | |
| 13 | .\" documentation and/or other materials provided with the distribution. | |
| 14 | .\" 3. All advertising materials mentioning features or use of this software | |
| 15 | .\" must display the following acknowledgement: | |
| 16 | .\" This product includes software developed by the University of | |
| 17 | .\" California, Berkeley and its contributors. | |
| 18 | .\" 4. Neither the name of the University nor the names of its contributors | |
| 19 | .\" may be used to endorse or promote products derived from this software | |
| 20 | .\" without specific prior written permission. | |
| 21 | .\" | |
| 22 | .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
| 23 | .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 24 | .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| 25 | .\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
| 26 | .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
| 27 | .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
| 28 | .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
| 29 | .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
| 30 | .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
| 31 | .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
| 32 | .\" SUCH DAMAGE. | |
| 33 | .\" | |
| 34 | .\" @(#)du.1 8.2 (Berkeley) 4/1/94 | |
| 35 | .\" | |
| 36 | .Dd October 4, 1996 | |
| 37 | .Dt DU 1 | |
| 38 | .Os | |
| 39 | .Sh NAME | |
| 40 | .Nm du | |
| 41 | .Nd display disk usage statistics | |
| 42 | .Sh SYNOPSIS | |
| 43 | .Nm | |
| 44 | .Op Fl H | Fl L | Fl P | |
| 45 | .Op Fl a | Fl s | |
| 46 | .Op Fl ckrx | |
| 47 | .Op Ar file ... | |
| 48 | .Sh DESCRIPTION | |
| 49 | The | |
| 50 | .Nm | |
| 51 | utility displays the file system block usage for each file argument | |
| 52 | and for each directory in the file hierarchy rooted in each directory | |
| 53 | argument. | |
| 54 | If no file is specified, the block usage of the hierarchy rooted in | |
| 55 | the current directory is displayed. | |
| 56 | .Pp | |
| 57 | The options are as follows: | |
| 58 | .Bl -tag -width Ds | |
| 59 | .It Fl H | |
| 60 | Symbolic links on the command line are followed. | |
| 61 | (Symbolic links encountered in the tree traversal are not followed.) | |
| 62 | .It Fl L | |
| 63 | All symbolic links are followed. | |
| 64 | .It Fl P | |
| 65 | No symbolic links are followed. | |
| 66 | .It Fl a | |
| 67 | Display an entry for each file in the file hierarchy. | |
| 68 | .It Fl k | |
| 69 | By default, | |
| 70 | .Nm | |
| 71 | displays the number of blocks as returned by the | |
| 72 | .Xr stat 2 | |
| 73 | system call, i.e. 512-byte blocks. | |
| 74 | If the | |
| 75 | .Fl k | |
| 76 | flag is specified, the number displayed is the number of 1024-byte | |
| 77 | blocks. | |
| 78 | Partial numbers of blocks are rounded up. | |
| 79 | .It Fl c | |
| 80 | Display the grand total after all the arguments have been processed. | |
| 81 | .It Fl r | |
| 82 | Generate warning messages about directories that cannot be read. | |
| 83 | This is the default behaviour. | |
| 84 | .It Fl s | |
| 85 | Display only the grand total for the specified files. | |
| 86 | .It Fl x | |
| 87 | Filesystem mount points are not traversed. | |
| 88 | .El | |
| 89 | .Pp | |
| 90 | .Nm | |
| 91 | counts the storage used by symbolic links and not the files they | |
| 92 | reference unless the | |
| 93 | .Fl H | |
| 94 | or | |
| 95 | .Fl L | |
| 96 | option is specified. | |
| 97 | If either the | |
| 98 | .Fl H | |
| 99 | or | |
| 100 | .Fl L | |
| 101 | options are specified, storage used by any symbolic links which are | |
| 102 | followed is not counted or displayed. | |
| 103 | The | |
| 104 | .Fl H , | |
| 105 | .Fl L | |
| 106 | and | |
| 107 | .Fl P | |
| 108 | options override each other and the command's actions are determined | |
| 109 | by the last one specified. | |
| 110 | .Pp | |
| 111 | Files having multiple hard links are counted (and displayed) a single | |
| 112 | time per | |
| 113 | .Nm | |
| 114 | execution. | |
| 115 | .Sh ENVIRONMENT VARIABLES | |
| 116 | .Bl -tag -width BLOCKSIZE | |
| 117 | .It Ev BLOCKSIZE | |
| 118 | If the environment variable | |
| 119 | .Ev BLOCKSIZE | |
| 120 | is set, and the | |
| 121 | .Fl k | |
| 122 | option is not specified, the block counts will be displayed in units of that | |
| 123 | size block. | |
| 124 | .El | |
| 125 | .Sh SEE ALSO | |
| 126 | .Xr df 1 , | |
| 127 | .Xr fts 3 , | |
| 128 | .Xr symlink 7 , | |
| 129 | .Xr quot 8 | |
| 130 | .Sh HISTORY | |
| 131 | A | |
| 132 | .Nm | |
| 133 | command appeared in | |
| 134 | .At v6 . |