350 lines
8.5 KiB
C
350 lines
8.5 KiB
C
/* $NetBSD: du.c,v 1.35 2011/09/01 13:37:33 joerg Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 1989, 1993, 1994
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to Berkeley by
|
|
* Chris Newcomb.
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
#ifndef lint
|
|
__COPYRIGHT("@(#) Copyright (c) 1989, 1993, 1994\
|
|
The Regents of the University of California. All rights reserved.");
|
|
#endif /* not lint */
|
|
|
|
#ifndef lint
|
|
#if 0
|
|
static char sccsid[] = "@(#)du.c 8.5 (Berkeley) 5/4/95";
|
|
#else
|
|
__RCSID("$NetBSD: du.c,v 1.35 2011/09/01 13:37:33 joerg Exp $");
|
|
#endif
|
|
#endif /* not lint */
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
|
|
#include <dirent.h>
|
|
#include <err.h>
|
|
#include <errno.h>
|
|
#include <fts.h>
|
|
#include <util.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
#include <limits.h>
|
|
|
|
static int linkchk(dev_t, ino_t);
|
|
static void prstat(const char *, int64_t);
|
|
__dead static void usage(void);
|
|
|
|
static int hflag;
|
|
static long blocksize;
|
|
|
|
int
|
|
main(int argc, char *argv[])
|
|
{
|
|
FTS *fts;
|
|
FTSENT *p;
|
|
int64_t totalblocks;
|
|
int ftsoptions, listfiles;
|
|
int depth;
|
|
int Hflag, Lflag, aflag, ch, cflag, dflag, gkmflag, nflag, rval, sflag;
|
|
const char *noargv[2];
|
|
|
|
Hflag = Lflag = aflag = cflag = dflag = gkmflag = nflag = sflag = 0;
|
|
totalblocks = 0;
|
|
ftsoptions = FTS_PHYSICAL;
|
|
depth = INT_MAX;
|
|
while ((ch = getopt(argc, argv, "HLPacd:ghkmnrsx")) != -1)
|
|
switch (ch) {
|
|
case 'H':
|
|
Hflag = 1;
|
|
Lflag = 0;
|
|
break;
|
|
case 'L':
|
|
Lflag = 1;
|
|
Hflag = 0;
|
|
break;
|
|
case 'P':
|
|
Hflag = Lflag = 0;
|
|
break;
|
|
case 'a':
|
|
aflag = 1;
|
|
break;
|
|
case 'c':
|
|
cflag = 1;
|
|
break;
|
|
case 'd':
|
|
dflag = 1;
|
|
depth = atoi(optarg);
|
|
if (depth < 0 || depth > SHRT_MAX) {
|
|
warnx("invalid argument to option d: %s",
|
|
optarg);
|
|
usage();
|
|
}
|
|
break;
|
|
case 'g':
|
|
blocksize = 1024 * 1024 * 1024;
|
|
gkmflag = 1;
|
|
break;
|
|
case 'h':
|
|
hflag = 1;
|
|
break;
|
|
case 'k':
|
|
blocksize = 1024;
|
|
gkmflag = 1;
|
|
break;
|
|
case 'm':
|
|
blocksize = 1024 * 1024;
|
|
gkmflag = 1;
|
|
break;
|
|
case 'n':
|
|
nflag = 1;
|
|
break;
|
|
case 'r':
|
|
break;
|
|
case 's':
|
|
sflag = 1;
|
|
break;
|
|
case 'x':
|
|
ftsoptions |= FTS_XDEV;
|
|
break;
|
|
case '?':
|
|
default:
|
|
usage();
|
|
}
|
|
argc -= optind;
|
|
argv += optind;
|
|
|
|
/*
|
|
* XXX
|
|
* Because of the way that fts(3) works, logical walks will not count
|
|
* the blocks actually used by symbolic links. We rationalize this by
|
|
* noting that users computing logical sizes are likely to do logical
|
|
* copies, so not counting the links is correct. The real reason is
|
|
* that we'd have to re-implement the kernel's symbolic link traversing
|
|
* algorithm to get this right. If, for example, you have relative
|
|
* symbolic links referencing other relative symbolic links, it gets
|
|
* very nasty, very fast. The bottom line is that it's documented in
|
|
* the man page, so it's a feature.
|
|
*/
|
|
if (Hflag)
|
|
ftsoptions |= FTS_COMFOLLOW;
|
|
if (Lflag) {
|
|
ftsoptions &= ~FTS_PHYSICAL;
|
|
ftsoptions |= FTS_LOGICAL;
|
|
}
|
|
|
|
listfiles = 0;
|
|
if (aflag) {
|
|
if (sflag || dflag)
|
|
usage();
|
|
listfiles = 1;
|
|
} else if (sflag) {
|
|
if (dflag)
|
|
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)
|
|
err(1, "fts_open `%s'", *argv);
|
|
|
|
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);
|
|
}
|