[unix-history] / usr.bin / du / du.c

/*
 * Copyright (c) 1989 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. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. 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.
 */

#ifndef lint
char copyright[] =
"@(#) Copyright (c) 1989 The Regents of the University of California.\n\
 All rights reserved.\n";
#endif /* not lint */

#ifndef lint
static char sccsid[] = "@(#)du.c	5.17 (Berkeley) 5/20/92";
#endif /* not lint */

#include <sys/param.h>
#include <sys/stat.h>
#include <sys/errno.h>
#include <dirent.h>
#include <stdio.h>
#include <fts.h>
#include <string.h>
#include <stdlib.h>

void	 err __P((const char *, ...));
char	*getbsize __P((char *, int *, long *));
int	 linkchk __P((FTSENT *));
void	 usage __P((void));

main(argc, argv)
	int argc;
	char *argv[];
{
	register FTS *fts;
	register FTSENT *p;
	register int listdirs, listfiles;
	long blocksize;
	int aflag, ch, ftsoptions, notused, sflag;
	char **save;

	ftsoptions = FTS_PHYSICAL;
	save = argv;
	aflag = sflag = 0;
	while ((ch = getopt(argc, argv, "asx")) != EOF)
		switch(ch) {
		case 'a':
			aflag = 1;
			break;
		case 's':
			sflag = 1;
			break;
		case 'x':
			ftsoptions |= FTS_XDEV;
			break;
		case '?':
		default:
			usage();
		}
	argv += optind;

	if (aflag) {
		if (sflag)
			usage();
		listdirs = listfiles = 1;
	} else if (sflag)
		listdirs = listfiles = 0;
	else {
		listfiles = 0;
		listdirs = 1;
	}

	if (!*argv) {
		argv = save;
		argv[0] = ".";
		argv[1] = NULL;
	}

	(void)getbsize("du", &notused, &blocksize);
	blocksize /= 512;

	if ((fts = fts_open(argv, ftsoptions, NULL)) == NULL)
		err("%s", strerror(errno));

	while (p = fts_read(fts))
		switch(p->fts_info) {
		case FTS_D:
			break;
		case FTS_DP:
			p->fts_parent->fts_number += 
			    p->fts_number += 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 (listdirs || !listfiles && !p->fts_level)
				(void)printf("%ld\t%s\n",
				    howmany(p->fts_number, blocksize),
				    p->fts_path);
			break;
		case FTS_DNR:
		case FTS_ERR:
		case FTS_NS:
			(void)fprintf(stderr,
			    "du: %s: %s\n", p->fts_path, strerror(errno));
			break;
		case FTS_SL:
			if (p->fts_level == FTS_ROOTLEVEL) {
				(void)fts_set(fts, p, FTS_FOLLOW);
				break;
			}
			/* FALLTHROUGH */
		default:
			if (p->fts_statp->st_nlink > 1 && linkchk(p))
				break;
			/*
			 * If listing each file, or a non-directory file was
			 * the root of a traversal, display the total.
			 */
			if (listfiles || !p->fts_level)
				(void)printf("%ld\t%s\n",
				    howmany(p->fts_statp->st_blocks, blocksize),
				    p->fts_path);
			p->fts_parent->fts_number += p->fts_statp->st_blocks;
		}
	if (errno)
		err("%s", strerror(errno));
	exit(0);
}

typedef struct _ID {
	dev_t	dev;
	ino_t	inode;
} ID;

int
linkchk(p)
	register FTSENT *p;
{
	static ID *files;
	static int maxfiles, nfiles;
	register ID *fp, *start;
	register ino_t ino;
	register dev_t dev;

	ino = p->fts_statp->st_ino;
	dev = p->fts_statp->st_dev;
	if (start = files)
		for (fp = start + nfiles - 1; fp >= start; --fp)
			if (ino == fp->inode && dev == fp->dev)
				return(1);

	if (nfiles == maxfiles && (files = realloc((char *)files,
	    (u_int)(sizeof(ID) * (maxfiles += 128)))) == NULL)
		err("%s", strerror(errno));
	files[nfiles].inode = ino;
	files[nfiles].dev = dev;
	++nfiles;
	return(0);
}

void
usage()
{
	(void)fprintf(stderr, "usage: du [-a | -s] [-x] [file ...]\n");
	exit(1);
}

#if __STDC__
#include <stdarg.h>
#else
#include <varargs.h>
#endif

void
#if __STDC__
err(const char *fmt, ...)
#else
err(fmt, va_alist)
	char *fmt;
        va_dcl
#endif
{
	va_list ap;
#if __STDC__
	va_start(ap, fmt);
#else
	va_start(ap);
#endif
	(void)fprintf(stderr, "du: ");
	(void)vfprintf(stderr, fmt, ap);
	va_end(ap);
	(void)fprintf(stderr, "\n");
	exit(1);
	/* NOTREACHED */
}
Commit	Line	Data
15637ed4 RG	1	/*
	2	* Copyright (c) 1989 The Regents of the University of California.
	3	* All rights reserved.
	4	*
	5	* This code is derived from software contributed to Berkeley by
	6	* Chris Newcomb.
	7	*
	8	* Redistribution and use in source and binary forms, with or without
	9	* modification, are permitted provided that the following conditions
	10	* are met:
	11	* 1. Redistributions of source code must retain the above copyright
	12	* notice, this list of conditions and the following disclaimer.
	13	* 2. Redistributions in binary form must reproduce the above copyright
	14	* notice, this list of conditions and the following disclaimer in the
	15	* documentation and/or other materials provided with the distribution.
	16	* 3. All advertising materials mentioning features or use of this software
	17	* must display the following acknowledgement:
	18	* This product includes software developed by the University of
	19	* California, Berkeley and its contributors.
	20	* 4. Neither the name of the University nor the names of its contributors
	21	* may be used to endorse or promote products derived from this software
	22	* without specific prior written permission.
	23	*
	24	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	25	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	26	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	27	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	28	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	29	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	30	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	31	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	32	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	33	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	34	* SUCH DAMAGE.
	35	*/
	36
	37	#ifndef lint
	38	char copyright[] =
	39	"@(#) Copyright (c) 1989 The Regents of the University of California.\n\
	40	All rights reserved.\n";
	41	#endif /* not lint */
	42
	43	#ifndef lint
4e97a0eb	44	static char sccsid[] = "@(#)du.c 5.17 (Berkeley) 5/20/92";
15637ed4 RG	45	#endif /* not lint */
	46
	47	#include <sys/param.h>
	48	#include <sys/stat.h>
	49	#include <sys/errno.h>
	50	#include <dirent.h>
	51	#include <stdio.h>
	52	#include <fts.h>
	53	#include <string.h>
	54	#include <stdlib.h>
	55
4e97a0eb NW	56	void err __P((const char *, ...));
	57	char getbsize __P((char , int , long ));
	58	int linkchk __P((FTSENT *));
	59	void usage __P((void));
	60
15637ed4 RG	61	main(argc, argv)
15637ed4 RG	62	int argc;
4e97a0eb	63	char *argv[];
15637ed4	64	{
15637ed4 RG	65	register FTS *fts;
15637ed4 RG	66	register FTSENT *p;
4e97a0eb NW	67	register int listdirs, listfiles;
	68	long blocksize;
	69	int aflag, ch, ftsoptions, notused, sflag;
15637ed4 RG	70	char **save;
	71
	72	ftsoptions = FTS_PHYSICAL;
15637ed4 RG	73	save = argv;
15637ed4 RG	74	aflag = sflag = 0;
4e97a0eb	75	while ((ch = getopt(argc, argv, "asx")) != EOF)
15637ed4 RG	76	switch(ch) {
	77	case 'a':
	78	aflag = 1;
	79	break;
15637ed4 RG	80	case 's':
	81	sflag = 1;
	82	break;
	83	case 'x':
	84	ftsoptions \|= FTS_XDEV;
	85	break;
	86	case '?':
	87	default:
	88	usage();
	89	}
	90	argv += optind;
	91
	92	if (aflag) {
	93	if (sflag)
	94	usage();
	95	listdirs = listfiles = 1;
	96	} else if (sflag)
	97	listdirs = listfiles = 0;
	98	else {
	99	listfiles = 0;
	100	listdirs = 1;
	101	}
	102
	103	if (!*argv) {
	104	argv = save;
	105	argv[0] = ".";
	106	argv[1] = NULL;
	107	}
	108
4e97a0eb NW	109	(void)getbsize("du", &notused, &blocksize);
	110	blocksize /= 512;
	111
	112	if ((fts = fts_open(argv, ftsoptions, NULL)) == NULL)
	113	err("%s", strerror(errno));
15637ed4 RG	114
	115	while (p = fts_read(fts))
	116	switch(p->fts_info) {
	117	case FTS_D:
	118	break;
	119	case FTS_DP:
	120	p->fts_parent->fts_number +=
4e97a0eb	121	p->fts_number += p->fts_statp->st_blocks;
15637ed4 RG	122	/*
	123	* If listing each directory, or not listing files
	124	* or directories and this is post-order of the
	125	* root of a traversal, display the total.
	126	*/
	127	if (listdirs \|\| !listfiles && !p->fts_level)
4e97a0eb NW	128	(void)printf("%ld\t%s\n",
	129	howmany(p->fts_number, blocksize),
	130	p->fts_path);
15637ed4 RG	131	break;
	132	case FTS_DNR:
	133	case FTS_ERR:
	134	case FTS_NS:
	135	(void)fprintf(stderr,
4e97a0eb	136	"du: %s: %s\n", p->fts_path, strerror(errno));
15637ed4 RG	137	break;
	138	case FTS_SL:
	139	if (p->fts_level == FTS_ROOTLEVEL) {
	140	(void)fts_set(fts, p, FTS_FOLLOW);
	141	break;
	142	}
	143	/* FALLTHROUGH */
	144	default:
4e97a0eb	145	if (p->fts_statp->st_nlink > 1 && linkchk(p))
15637ed4 RG	146	break;
	147	/*
	148	* If listing each file, or a non-directory file was
	149	* the root of a traversal, display the total.
	150	*/
	151	if (listfiles \|\| !p->fts_level)
4e97a0eb NW	152	(void)printf("%ld\t%s\n",
	153	howmany(p->fts_statp->st_blocks, blocksize),
	154	p->fts_path);
	155	p->fts_parent->fts_number += p->fts_statp->st_blocks;
15637ed4	156	}
4e97a0eb NW	157	if (errno)
4e97a0eb NW	158	err("%s", strerror(errno));
15637ed4 RG	159	exit(0);
	160	}
	161
	162	typedef struct _ID {
	163	dev_t dev;
	164	ino_t inode;
	165	} ID;
	166
4e97a0eb	167	int
15637ed4 RG	168	linkchk(p)
	169	register FTSENT *p;
	170	{
	171	static ID *files;
	172	static int maxfiles, nfiles;
	173	register ID fp, start;
	174	register ino_t ino;
	175	register dev_t dev;
	176
4e97a0eb NW	177	ino = p->fts_statp->st_ino;
4e97a0eb NW	178	dev = p->fts_statp->st_dev;
15637ed4 RG	179	if (start = files)
	180	for (fp = start + nfiles - 1; fp >= start; --fp)
	181	if (ino == fp->inode && dev == fp->dev)
	182	return(1);
	183
4e97a0eb NW	184	if (nfiles == maxfiles && (files = realloc((char *)files,
	185	(u_int)(sizeof(ID) * (maxfiles += 128)))) == NULL)
	186	err("%s", strerror(errno));
15637ed4 RG	187	files[nfiles].inode = ino;
	188	files[nfiles].dev = dev;
	189	++nfiles;
	190	return(0);
	191	}
	192
4e97a0eb	193	void
15637ed4 RG	194	usage()
15637ed4 RG	195	{
4e97a0eb NW	196	(void)fprintf(stderr, "usage: du [-a \| -s] [-x] [file ...]\n");
	197	exit(1);
	198	}
	199
	200	#if __STDC__
	201	#include <stdarg.h>
	202	#else
	203	#include <varargs.h>
	204	#endif
	205
	206	void
	207	#if __STDC__
	208	err(const char *fmt, ...)
	209	#else
	210	err(fmt, va_alist)
	211	char *fmt;
	212	va_dcl
	213	#endif
	214	{
	215	va_list ap;
	216	#if __STDC__
	217	va_start(ap, fmt);
	218	#else
	219	va_start(ap);
	220	#endif
	221	(void)fprintf(stderr, "du: ");
	222	(void)vfprintf(stderr, fmt, ap);
	223	va_end(ap);
	224	(void)fprintf(stderr, "\n");
15637ed4	225	exit(1);
4e97a0eb	226	/* NOTREACHED */
15637ed4	227	}