Import NetBSD du(1)
This commit is contained in:
David van Moolenbroek
@@ -0,0 +1,6 @@
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# $NetBSD: Makefile,v 1.9 2009/04/14 22:15:19 lukem Exp $
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# @(#)Makefile 8.1 (Berkeley) 6/6/93
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PROG= du
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.include <bsd.prog.mk>
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+163
@@ -0,0 +1,163 @@
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.\" $NetBSD: du.1,v 1.21 2006/09/24 07:19:16 wiz Exp $
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.\"
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.\" Copyright (c) 1990, 1993
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.\" The Regents of the University of California. All rights reserved.
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||||
.\"
|
||||
.\" Redistribution and use in source and binary forms, with or without
|
||||
.\" modification, are permitted provided that the following conditions
|
||||
.\" are met:
|
||||
.\" 1. Redistributions of source code must retain the above copyright
|
||||
.\" notice, this list of conditions and the following disclaimer.
|
||||
.\" 2. Redistributions in binary form must reproduce the above copyright
|
||||
.\" notice, this list of conditions and the following disclaimer in the
|
||||
.\" documentation and/or other materials provided with the distribution.
|
||||
.\" 3. Neither the name of the University nor the names of its contributors
|
||||
.\" may be used to endorse or promote products derived from this software
|
||||
.\" without specific prior written permission.
|
||||
.\"
|
||||
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
||||
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
||||
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||||
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||||
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||||
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
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.\" SUCH DAMAGE.
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.\"
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.\" @(#)du.1 8.2 (Berkeley) 4/1/94
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.\"
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.Dd September 24, 2006
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.Dt DU 1
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.Os
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.Sh NAME
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.Nm du
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.Nd display disk usage statistics
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.Sh SYNOPSIS
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.Nm
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.Op Fl H | Fl L | Fl P
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.Op Fl a | Fl d Ar depth | Fl s
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.Op Fl cghkmnrx
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.Op Ar file ...
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.Sh DESCRIPTION
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The
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.Nm
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utility displays the file system block usage for each file argument
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and for each directory in the file hierarchy rooted in each directory
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argument.
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If no file is specified, the block usage of the hierarchy rooted in
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the current directory is displayed.
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||||
.Pp
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The options are as follows:
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.Bl -tag -width Ds
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.It Fl H
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Symbolic links on the command line are followed.
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(Symbolic links encountered in the tree traversal are not followed.)
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.It Fl L
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All symbolic links are followed.
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.It Fl P
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No symbolic links are followed.
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.It Fl a
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Display an entry for each file in the file hierarchy.
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.It Fl c
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Display the grand total after all the arguments have been processed.
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.It Fl d
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Display an entry files and directories
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.Ar depth
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directories deep.
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.It Fl g
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If the
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.Fl g
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flag is specified, the number displayed is the number of gigabyte
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(1024*1024*1024 bytes) blocks.
|
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.It Fl h
|
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If the
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.Fl h
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||||
flag is specified, the numbers will be displayed in "human-readable"
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format.
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||||
Use unit suffixes: B (Byte), K (Kilobyte), M (Megabyte), G (Gigabyte),
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T (Terabyte) and P (Petabyte).
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.It Fl k
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By default,
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.Nm
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displays the number of blocks as returned by the
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.Xr stat 2
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system call, i.e. 512-byte blocks.
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If the
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.Fl k
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flag is specified, the number displayed is the number of kilobyte
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(1024 bytes) blocks.
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Partial numbers of blocks are rounded up.
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.It Fl m
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If the
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.Fl m
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||||
flag is specified, the number displayed is the number of megabyte
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(1024*1024 bytes) blocks.
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.It Fl n
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Ignore files and directories with user
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.Qq nodump
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flag
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.Pq Dv UF_NODUMP
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set.
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.It Fl r
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Generate warning messages about directories that cannot be read.
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This is the default behaviour.
|
||||
.It Fl s
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Display only the grand total for the specified files.
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.It Fl x
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Filesystem mount points are not traversed.
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.El
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.Pp
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||||
.Nm
|
||||
counts the storage used by symbolic links and not the files they
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||||
reference unless the
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.Fl H
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or
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.Fl L
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||||
option is specified.
|
||||
If either the
|
||||
.Fl H
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||||
or
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.Fl L
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||||
options are specified, storage used by any symbolic links which are
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||||
followed is not counted or displayed.
|
||||
The
|
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.Fl H ,
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.Fl L
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and
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.Fl P
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options override each other and the command's actions are determined
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by the last one specified.
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.Pp
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Files having multiple hard links are counted (and displayed) a single
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time per
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.Nm
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execution.
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.Sh ENVIRONMENT
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.Bl -tag -width BLOCKSIZE
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.It Ev BLOCKSIZE
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If the environment variable
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.Ev BLOCKSIZE
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is set, and the
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.Fl g ,
|
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.Fl h ,
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.Fl k ,
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and
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.Fl m
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options are not specified, the block counts will be displayed in units of that
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size block.
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.El
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.Sh SEE ALSO
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.Xr df 1 ,
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.Xr chflags 2 ,
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.Xr fts 3 ,
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.Xr getbsize 3 ,
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.Xr symlink 7 ,
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.Xr quot 8
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.Sh HISTORY
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A
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.Nm
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command appeared in
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.At v6 .
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+350
@@ -0,0 +1,350 @@
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/* $NetBSD: du.c,v 1.35 2011/09/01 13:37:33 joerg Exp $ */
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/*
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* Copyright (c) 1989, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Chris Newcomb.
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*
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||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
* 3. Neither the name of the University nor the names of its contributors
|
||||
* may be used to endorse or promote products derived from this software
|
||||
* without specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
||||
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
||||
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||||
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||||
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||||
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||
* SUCH DAMAGE.
|
||||
*/
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||||
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#include <sys/cdefs.h>
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#ifndef lint
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__COPYRIGHT("@(#) Copyright (c) 1989, 1993, 1994\
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The Regents of the University of California. All rights reserved.");
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#endif /* not lint */
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)du.c 8.5 (Berkeley) 5/4/95";
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#else
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__RCSID("$NetBSD: du.c,v 1.35 2011/09/01 13:37:33 joerg Exp $");
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#endif
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#endif /* not lint */
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#include <sys/param.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <dirent.h>
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#include <err.h>
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#include <errno.h>
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#include <fts.h>
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#include <util.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <limits.h>
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static int linkchk(dev_t, ino_t);
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static void prstat(const char *, int64_t);
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__dead static void usage(void);
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static int hflag;
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static long blocksize;
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int
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main(int argc, char *argv[])
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{
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FTS *fts;
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FTSENT *p;
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int64_t totalblocks;
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int ftsoptions, listfiles;
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int depth;
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int Hflag, Lflag, aflag, ch, cflag, dflag, gkmflag, nflag, rval, sflag;
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const char *noargv[2];
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Hflag = Lflag = aflag = cflag = dflag = gkmflag = nflag = sflag = 0;
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totalblocks = 0;
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ftsoptions = FTS_PHYSICAL;
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depth = INT_MAX;
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while ((ch = getopt(argc, argv, "HLPacd:ghkmnrsx")) != -1)
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switch (ch) {
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case 'H':
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Hflag = 1;
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Lflag = 0;
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break;
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case 'L':
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Lflag = 1;
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Hflag = 0;
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break;
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case 'P':
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Hflag = Lflag = 0;
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break;
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case 'a':
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aflag = 1;
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break;
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case 'c':
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cflag = 1;
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break;
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case 'd':
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dflag = 1;
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depth = atoi(optarg);
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if (depth < 0 || depth > SHRT_MAX) {
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warnx("invalid argument to option d: %s",
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optarg);
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usage();
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}
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break;
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case 'g':
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blocksize = 1024 * 1024 * 1024;
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gkmflag = 1;
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break;
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case 'h':
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hflag = 1;
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break;
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case 'k':
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blocksize = 1024;
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gkmflag = 1;
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break;
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case 'm':
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blocksize = 1024 * 1024;
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gkmflag = 1;
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break;
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||||
case 'n':
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nflag = 1;
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break;
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||||
case 'r':
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break;
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||||
case 's':
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sflag = 1;
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break;
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||||
case 'x':
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ftsoptions |= FTS_XDEV;
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break;
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case '?':
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default:
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usage();
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}
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argc -= optind;
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argv += optind;
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/*
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* XXX
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* Because of the way that fts(3) works, logical walks will not count
|
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* the blocks actually used by symbolic links. We rationalize this by
|
||||
* noting that users computing logical sizes are likely to do logical
|
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* copies, so not counting the links is correct. The real reason is
|
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* that we'd have to re-implement the kernel's symbolic link traversing
|
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* algorithm to get this right. If, for example, you have relative
|
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* symbolic links referencing other relative symbolic links, it gets
|
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* very nasty, very fast. The bottom line is that it's documented in
|
||||
* the man page, so it's a feature.
|
||||
*/
|
||||
if (Hflag)
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ftsoptions |= FTS_COMFOLLOW;
|
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if (Lflag) {
|
||||
ftsoptions &= ~FTS_PHYSICAL;
|
||||
ftsoptions |= FTS_LOGICAL;
|
||||
}
|
||||
|
||||
listfiles = 0;
|
||||
if (aflag) {
|
||||
if (sflag || dflag)
|
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usage();
|
||||
listfiles = 1;
|
||||
} else if (sflag) {
|
||||
if (dflag)
|
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usage();
|
||||
depth = 0;
|
||||
}
|
||||
|
||||
if (!*argv) {
|
||||
noargv[0] = ".";
|
||||
noargv[1] = NULL;
|
||||
argv = __UNCONST(noargv);
|
||||
}
|
||||
|
||||
if (!gkmflag)
|
||||
(void)getbsize(NULL, &blocksize);
|
||||
blocksize /= 512;
|
||||
|
||||
if ((fts = fts_open(argv, ftsoptions, NULL)) == NULL)
|
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err(1, "fts_open `%s'", *argv);
|
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|
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for (rval = 0; (p = fts_read(fts)) != NULL;) {
|
||||
if (nflag) {
|
||||
switch (p->fts_info) {
|
||||
case FTS_NS:
|
||||
case FTS_SLNONE:
|
||||
/* nothing */
|
||||
break;
|
||||
default:
|
||||
if (p->fts_statp->st_flags & UF_NODUMP) {
|
||||
fts_set(fts, p, FTS_SKIP);
|
||||
continue;
|
||||
}
|
||||
}
|
||||
}
|
||||
switch (p->fts_info) {
|
||||
case FTS_D: /* Ignore. */
|
||||
break;
|
||||
case FTS_DP:
|
||||
p->fts_parent->fts_number +=
|
||||
p->fts_number += p->fts_statp->st_blocks;
|
||||
if (cflag)
|
||||
totalblocks += p->fts_statp->st_blocks;
|
||||
/*
|
||||
* If listing each directory, or not listing files
|
||||
* or directories and this is post-order of the
|
||||
* root of a traversal, display the total.
|
||||
*/
|
||||
if (p->fts_level <= depth
|
||||
|| (!listfiles && !p->fts_level))
|
||||
prstat(p->fts_path, p->fts_number);
|
||||
break;
|
||||
case FTS_DC: /* Ignore. */
|
||||
break;
|
||||
case FTS_DNR: /* Warn, continue. */
|
||||
case FTS_ERR:
|
||||
case FTS_NS:
|
||||
warnx("%s: %s", p->fts_path, strerror(p->fts_errno));
|
||||
rval = 1;
|
||||
break;
|
||||
default:
|
||||
if (p->fts_statp->st_nlink > 1 &&
|
||||
linkchk(p->fts_statp->st_dev, p->fts_statp->st_ino))
|
||||
break;
|
||||
/*
|
||||
* If listing each file, or a non-directory file was
|
||||
* the root of a traversal, display the total.
|
||||
*/
|
||||
if (listfiles || !p->fts_level)
|
||||
prstat(p->fts_path, p->fts_statp->st_blocks);
|
||||
p->fts_parent->fts_number += p->fts_statp->st_blocks;
|
||||
if (cflag)
|
||||
totalblocks += p->fts_statp->st_blocks;
|
||||
}
|
||||
}
|
||||
if (errno)
|
||||
err(1, "fts_read");
|
||||
if (cflag)
|
||||
prstat("total", totalblocks);
|
||||
exit(rval);
|
||||
}
|
||||
|
||||
static void
|
||||
prstat(const char *fname, int64_t blocks)
|
||||
{
|
||||
if (hflag) {
|
||||
char buf[5];
|
||||
int64_t sz = blocks * 512;
|
||||
|
||||
humanize_number(buf, sizeof(buf), sz, "", HN_AUTOSCALE,
|
||||
HN_B | HN_NOSPACE | HN_DECIMAL);
|
||||
|
||||
(void)printf("%s\t%s\n", buf, fname);
|
||||
} else
|
||||
(void)printf("%lld\t%s\n",
|
||||
(long long)howmany(blocks, (int64_t)blocksize),
|
||||
fname);
|
||||
}
|
||||
|
||||
static int
|
||||
linkchk(dev_t dev, ino_t ino)
|
||||
{
|
||||
static struct entry {
|
||||
dev_t dev;
|
||||
ino_t ino;
|
||||
} *htable;
|
||||
static int htshift; /* log(allocated size) */
|
||||
static int htmask; /* allocated size - 1 */
|
||||
static int htused; /* 2*number of insertions */
|
||||
static int sawzero; /* Whether zero is in table or not */
|
||||
int h, h2;
|
||||
uint64_t tmp;
|
||||
/* this constant is (1<<64)/((1+sqrt(5))/2)
|
||||
* aka (word size)/(golden ratio)
|
||||
*/
|
||||
const uint64_t HTCONST = 11400714819323198485ULL;
|
||||
const int HTBITS = CHAR_BIT * sizeof(tmp);
|
||||
|
||||
/* Never store zero in hashtable */
|
||||
if (dev == 0 && ino == 0) {
|
||||
h = sawzero;
|
||||
sawzero = 1;
|
||||
return h;
|
||||
}
|
||||
|
||||
/* Extend hash table if necessary, keep load under 0.5 */
|
||||
if (htused<<1 >= htmask) {
|
||||
struct entry *ohtable;
|
||||
|
||||
if (!htable)
|
||||
htshift = 10; /* starting hashtable size */
|
||||
else
|
||||
htshift++; /* exponential hashtable growth */
|
||||
|
||||
htmask = (1 << htshift) - 1;
|
||||
htused = 0;
|
||||
|
||||
ohtable = htable;
|
||||
htable = calloc(htmask+1, sizeof(*htable));
|
||||
if (!htable)
|
||||
err(1, "calloc");
|
||||
|
||||
/* populate newly allocated hashtable */
|
||||
if (ohtable) {
|
||||
int i;
|
||||
for (i = 0; i <= htmask>>1; i++)
|
||||
if (ohtable[i].ino || ohtable[i].dev)
|
||||
linkchk(ohtable[i].dev, ohtable[i].ino);
|
||||
free(ohtable);
|
||||
}
|
||||
}
|
||||
|
||||
/* multiplicative hashing */
|
||||
tmp = dev;
|
||||
tmp <<= HTBITS>>1;
|
||||
tmp |= ino;
|
||||
tmp *= HTCONST;
|
||||
h = tmp >> (HTBITS - htshift);
|
||||
h2 = 1 | ( tmp >> (HTBITS - (htshift<<1) - 1)); /* must be odd */
|
||||
|
||||
/* open address hashtable search with double hash probing */
|
||||
while (htable[h].ino || htable[h].dev) {
|
||||
if ((htable[h].ino == ino) && (htable[h].dev == dev))
|
||||
return 1;
|
||||
h = (h + h2) & htmask;
|
||||
}
|
||||
|
||||
/* Insert the current entry into hashtable */
|
||||
htable[h].dev = dev;
|
||||
htable[h].ino = ino;
|
||||
htused++;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void
|
||||
usage(void)
|
||||
{
|
||||
|
||||
(void)fprintf(stderr,
|
||||
"usage: du [-H | -L | -P] [-a | -d depth | -s] [-cghkmnrx] [file ...]\n");
|
||||
exit(1);
|
||||
}
|
||||
Reference in New Issue
Block a user