4f6e2a4607
SIGINFO). Provides some progress report for the impatient. This won't report that we're blocking in our walk due to disk/network problems, however. There's no really good way to report that condition that I'm aware of...
549 lines
12 KiB
C
549 lines
12 KiB
C
/*
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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
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* 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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#ifndef lint
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static const char copyright[] =
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"@(#) Copyright (c) 1989, 1993, 1994\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif /* not lint */
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#ifndef lint
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#if 0
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static const char sccsid[] = "@(#)du.c 8.5 (Berkeley) 5/4/95";
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#endif
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#endif /* not lint */
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/queue.h>
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#include <sys/stat.h>
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#include <err.h>
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#include <errno.h>
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#include <fnmatch.h>
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#include <fts.h>
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#include <libutil.h>
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#include <locale.h>
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#include <stdint.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 <sysexits.h>
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#include <unistd.h>
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SLIST_HEAD(ignhead, ignentry) ignores;
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struct ignentry {
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char *mask;
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SLIST_ENTRY(ignentry) next;
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};
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static int linkchk(FTSENT *);
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static void usage(void);
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static void prthumanval(int64_t);
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static void ignoreadd(const char *);
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static void ignoreclean(void);
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static int ignorep(FTSENT *);
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static void siginfo(int __unused);
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static int nodumpflag = 0;
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static int Aflag;
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static long blocksize, cblocksize;
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static volatile sig_atomic_t info;
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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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off_t savednumber, curblocks;
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int ftsoptions;
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int listall;
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int depth;
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int Hflag, Lflag, Pflag, aflag, sflag, dflag, cflag;
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int hflag, lflag, ch, notused, rval;
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char **save;
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static char dot[] = ".";
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setlocale(LC_ALL, "");
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Hflag = Lflag = Pflag = aflag = sflag = dflag = cflag = hflag =
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lflag = Aflag = 0;
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save = argv;
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ftsoptions = 0;
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savednumber = 0;
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cblocksize = DEV_BSIZE;
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blocksize = 0;
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depth = INT_MAX;
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SLIST_INIT(&ignores);
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while ((ch = getopt(argc, argv, "AB:HI:LPasd:chklmnrx")) != -1)
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switch (ch) {
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case 'A':
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Aflag = 1;
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break;
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case 'B':
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errno = 0;
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cblocksize = atoi(optarg);
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if (errno == ERANGE || cblocksize <= 0) {
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warnx("invalid argument to option B: %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 'H':
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Hflag = 1;
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break;
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case 'I':
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ignoreadd(optarg);
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break;
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case 'L':
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if (Pflag)
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usage();
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Lflag = 1;
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break;
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case 'P':
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if (Lflag)
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usage();
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Pflag = 1;
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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 's':
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sflag = 1;
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break;
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case 'd':
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dflag = 1;
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errno = 0;
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depth = atoi(optarg);
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if (errno == ERANGE || depth < 0) {
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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 'c':
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cflag = 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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hflag = 0;
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blocksize = 1024;
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break;
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case 'l':
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lflag = 1;
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break;
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case 'm':
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hflag = 0;
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blocksize = 1048576;
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break;
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case 'n':
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nodumpflag = 1;
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break;
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case 'r': /* Compatibility. */
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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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/* NOTREACHED */
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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
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* 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
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* the man page, so it's a feature.
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*/
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if (Hflag + Lflag + Pflag > 1)
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usage();
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if (Hflag + Lflag + Pflag == 0)
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Pflag = 1; /* -P (physical) is default */
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if (Hflag)
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ftsoptions |= FTS_COMFOLLOW;
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if (Lflag)
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ftsoptions |= FTS_LOGICAL;
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if (Pflag)
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ftsoptions |= FTS_PHYSICAL;
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if (!Aflag && (cblocksize % DEV_BSIZE) != 0)
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cblocksize = howmany(cblocksize, DEV_BSIZE) * DEV_BSIZE;
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listall = 0;
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if (aflag) {
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if (sflag || dflag)
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usage();
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listall = 1;
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} else if (sflag) {
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if (dflag)
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usage();
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depth = 0;
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}
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if (!*argv) {
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argv = save;
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argv[0] = dot;
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argv[1] = NULL;
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}
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if (blocksize == 0)
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(void)getbsize(¬used, &blocksize);
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if (!Aflag) {
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cblocksize /= DEV_BSIZE;
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blocksize /= DEV_BSIZE;
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}
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rval = 0;
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(void)signal(SIGINFO, siginfo);
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if ((fts = fts_open(argv, ftsoptions, NULL)) == NULL)
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err(1, "fts_open");
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while ((p = fts_read(fts)) != NULL) {
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switch (p->fts_info) {
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case FTS_D: /* Ignore. */
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if (ignorep(p))
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fts_set(fts, p, FTS_SKIP);
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break;
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case FTS_DP:
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if (ignorep(p))
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break;
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curblocks = Aflag ?
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howmany(p->fts_statp->st_size, cblocksize) :
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howmany(p->fts_statp->st_blocks, cblocksize);
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p->fts_parent->fts_bignum += p->fts_bignum +=
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curblocks;
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if (p->fts_level <= depth) {
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if (hflag) {
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prthumanval(p->fts_bignum);
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(void)printf("\t%s\n", p->fts_path);
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} else {
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(void)printf("%jd\t%s\n",
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(intmax_t)howmany(p->fts_bignum *
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cblocksize, blocksize),
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p->fts_path);
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}
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}
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if (info) {
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info = 0;
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(void)printf("\t%s\n", p->fts_path);
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}
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break;
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case FTS_DC: /* Ignore. */
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break;
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case FTS_DNR: /* Warn, continue. */
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case FTS_ERR:
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case FTS_NS:
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warnx("%s: %s", p->fts_path, strerror(p->fts_errno));
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rval = 1;
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break;
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default:
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if (ignorep(p))
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break;
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if (lflag == 0 && p->fts_statp->st_nlink > 1 &&
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linkchk(p))
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break;
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curblocks = Aflag ?
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howmany(p->fts_statp->st_size, cblocksize) :
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howmany(p->fts_statp->st_blocks, cblocksize);
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if (listall || p->fts_level == 0) {
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if (hflag) {
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prthumanval(curblocks);
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(void)printf("\t%s\n", p->fts_path);
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} else {
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(void)printf("%jd\t%s\n",
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(intmax_t)howmany(curblocks *
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cblocksize, blocksize),
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p->fts_path);
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}
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}
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p->fts_parent->fts_bignum += curblocks;
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}
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savednumber = p->fts_parent->fts_bignum;
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}
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if (errno)
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err(1, "fts_read");
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if (cflag) {
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if (hflag) {
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prthumanval(savednumber);
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(void)printf("\ttotal\n");
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} else {
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(void)printf("%jd\ttotal\n", (intmax_t)howmany(
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savednumber * cblocksize, blocksize));
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}
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}
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ignoreclean();
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exit(rval);
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}
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static int
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linkchk(FTSENT *p)
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{
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struct links_entry {
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struct links_entry *next;
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struct links_entry *previous;
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int links;
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dev_t dev;
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ino_t ino;
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};
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static const size_t links_hash_initial_size = 8192;
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static struct links_entry **buckets;
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static struct links_entry *free_list;
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static size_t number_buckets;
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static unsigned long number_entries;
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static char stop_allocating;
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struct links_entry *le, **new_buckets;
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struct stat *st;
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size_t i, new_size;
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int hash;
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st = p->fts_statp;
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/* If necessary, initialize the hash table. */
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if (buckets == NULL) {
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number_buckets = links_hash_initial_size;
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buckets = malloc(number_buckets * sizeof(buckets[0]));
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if (buckets == NULL)
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errx(1, "No memory for hardlink detection");
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for (i = 0; i < number_buckets; i++)
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buckets[i] = NULL;
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}
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/* If the hash table is getting too full, enlarge it. */
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if (number_entries > number_buckets * 10 && !stop_allocating) {
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new_size = number_buckets * 2;
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new_buckets = malloc(new_size * sizeof(struct links_entry *));
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/* Try releasing the free list to see if that helps. */
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if (new_buckets == NULL && free_list != NULL) {
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while (free_list != NULL) {
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le = free_list;
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free_list = le->next;
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free(le);
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}
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new_buckets = malloc(new_size *
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sizeof(new_buckets[0]));
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}
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if (new_buckets == NULL) {
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stop_allocating = 1;
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warnx("No more memory for tracking hard links");
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} else {
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memset(new_buckets, 0,
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new_size * sizeof(struct links_entry *));
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for (i = 0; i < number_buckets; i++) {
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while (buckets[i] != NULL) {
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/* Remove entry from old bucket. */
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le = buckets[i];
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buckets[i] = le->next;
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/* Add entry to new bucket. */
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hash = (le->dev ^ le->ino) % new_size;
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if (new_buckets[hash] != NULL)
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new_buckets[hash]->previous =
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le;
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le->next = new_buckets[hash];
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le->previous = NULL;
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new_buckets[hash] = le;
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}
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}
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free(buckets);
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buckets = new_buckets;
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number_buckets = new_size;
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}
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}
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/* Try to locate this entry in the hash table. */
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hash = ( st->st_dev ^ st->st_ino ) % number_buckets;
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for (le = buckets[hash]; le != NULL; le = le->next) {
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if (le->dev == st->st_dev && le->ino == st->st_ino) {
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/*
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* Save memory by releasing an entry when we've seen
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* all of it's links.
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*/
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if (--le->links <= 0) {
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if (le->previous != NULL)
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le->previous->next = le->next;
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if (le->next != NULL)
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le->next->previous = le->previous;
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if (buckets[hash] == le)
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buckets[hash] = le->next;
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number_entries--;
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/* Recycle this node through the free list */
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if (stop_allocating) {
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free(le);
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} else {
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le->next = free_list;
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free_list = le;
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}
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}
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return (1);
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}
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}
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if (stop_allocating)
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return (0);
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/* Add this entry to the links cache. */
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if (free_list != NULL) {
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/* Pull a node from the free list if we can. */
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le = free_list;
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free_list = le->next;
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} else
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/* Malloc one if we have to. */
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le = malloc(sizeof(struct links_entry));
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if (le == NULL) {
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stop_allocating = 1;
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warnx("No more memory for tracking hard links");
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return (0);
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}
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le->dev = st->st_dev;
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le->ino = st->st_ino;
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le->links = st->st_nlink - 1;
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number_entries++;
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le->next = buckets[hash];
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le->previous = NULL;
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if (buckets[hash] != NULL)
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buckets[hash]->previous = le;
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buckets[hash] = le;
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return (0);
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}
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static void
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prthumanval(int64_t bytes)
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{
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char buf[5];
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bytes *= cblocksize;
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if (!Aflag)
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bytes *= DEV_BSIZE;
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humanize_number(buf, sizeof(buf), bytes, "", HN_AUTOSCALE,
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HN_B | HN_NOSPACE | HN_DECIMAL);
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(void)printf("%4s", buf);
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}
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static void
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usage(void)
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{
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(void)fprintf(stderr,
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"usage: du [-A] [-H | -L | -P] [-a | -s | -d depth] [-c] "
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"[-l] [-h | -k | -m | -B bsize] [-n] [-x] [-I mask] "
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"[file ...]\n");
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exit(EX_USAGE);
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}
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static void
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ignoreadd(const char *mask)
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{
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struct ignentry *ign;
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ign = calloc(1, sizeof(*ign));
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if (ign == NULL)
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errx(1, "cannot allocate memory");
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ign->mask = strdup(mask);
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if (ign->mask == NULL)
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errx(1, "cannot allocate memory");
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SLIST_INSERT_HEAD(&ignores, ign, next);
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}
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static void
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ignoreclean(void)
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{
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struct ignentry *ign;
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while (!SLIST_EMPTY(&ignores)) {
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ign = SLIST_FIRST(&ignores);
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SLIST_REMOVE_HEAD(&ignores, next);
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free(ign->mask);
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free(ign);
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}
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}
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static int
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ignorep(FTSENT *ent)
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{
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struct ignentry *ign;
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if (nodumpflag && (ent->fts_statp->st_flags & UF_NODUMP))
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return 1;
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SLIST_FOREACH(ign, &ignores, next)
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if (fnmatch(ign->mask, ent->fts_name, 0) != FNM_NOMATCH)
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return 1;
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return 0;
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}
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static void
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siginfo(int sig __unused)
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|
{
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info = 1;
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}
|