du_u.c - toolbox - Rivoreo Source Code Repositories

 /*	$NetBSD: du.c,v 1.33 2008/07/30 22:03:40 dsl 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>
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <dirent.h>
 #include <err.h>
 #include <errno.h>
 #include <fts.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
 #include <limits.h>
 #include <stdint.h>

 int	linkchk(dev_t, ino_t);
 void	prstat(const char *, int64_t);
 void	usage(void);

 long blocksize;

 #ifndef howmany
 #define howmany(x, y) (((x)+((y)-1))/(y))
 #endif

 int
 du_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, rval, sflag;
 	char *noargv[2];

 	Hflag = Lflag = aflag = cflag = dflag = gkmflag = 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 'k':
 			blocksize = 1024;
 			gkmflag = 1;
 			break;
 		case 'm':
 			blocksize = 1024 * 1024;
 			gkmflag = 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 = noargv;
 	}

 	if(!gkmflag) blocksize = 512;
 	blocksize /= 512;

 	if(!(fts = fts_open(argv, ftsoptions, NULL))) err(1, "fts_open `%s'", *argv);

 	for(rval = 0; (p = fts_read(fts));) {
 		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);
 }

 void
 prstat(const char *fname, int64_t blocks)
 {
 	(void)printf("%lld\t%s\n",
 	    (long long)howmany(blocks, (int64_t)blocksize),
 	    fname);
 }

 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;
 }

 void
 usage(void)
 {
 	fprintf(stderr, "Usage: du [-H | -L | -P] [-a | -d depth | -s] [-cgkmrx] [file ...]\n");
 	exit(1);
 }
	/* $NetBSD: du.c,v 1.33 2008/07/30 22:03:40 dsl 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>
	#include <sys/types.h>
	#include <sys/stat.h>
	#include <dirent.h>
	#include <err.h>
	#include <errno.h>
	#include <fts.h>
	#include <stdio.h>
	#include <stdlib.h>
	#include <string.h>
	#include <unistd.h>
	#include <limits.h>
	#include <stdint.h>

	int linkchk(dev_t, ino_t);
	void prstat(const char *, int64_t);
	void usage(void);

	long blocksize;

	#ifndef howmany
	#define howmany(x, y) (((x)+((y)-1))/(y))
	#endif

	int
	du_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, rval, sflag;
	char *noargv[2];

	Hflag = Lflag = aflag = cflag = dflag = gkmflag = 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 'k':
	blocksize = 1024;
	gkmflag = 1;
	break;
	case 'm':
	blocksize = 1024 * 1024;
	gkmflag = 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 = noargv;
	}

	if(!gkmflag) blocksize = 512;
	blocksize /= 512;

	if(!(fts = fts_open(argv, ftsoptions, NULL))) err(1, "fts_open `%s'", *argv);

	for(rval = 0; (p = fts_read(fts));) {
	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);
	}

	void
	prstat(const char *fname, int64_t blocks)
	{
	(void)printf("%lld\t%s\n",
	(long long)howmany(blocks, (int64_t)blocksize),
	fname);
	}

	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; /* 2number 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;
	}

	void
	usage(void)
	{
	fprintf(stderr, "Usage: du [-H \| -L \| -P] [-a \| -d depth \| -s] [-cgkmrx] [file ...]\n");
	exit(1);
	}