NetBSD/usr.bin/du/du.c

195 lines
5.1 KiB
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 5.12 (Berkeley) 6/20/91";
#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>
main(argc, argv)
int argc;
char **argv;
{
extern int optind;
register FTS *fts;
register FTSENT *p;
register int kvalue, listdirs, listfiles;
int aflag, ch, ftsoptions, sflag;
char **save;
ftsoptions = FTS_PHYSICAL;
kvalue = 0;
save = argv;
aflag = sflag = 0;
while ((ch = getopt(argc, argv, "aksx")) != EOF)
switch(ch) {
case 'a':
aflag = 1;
break;
case 'k':
kvalue = 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;
}
if (!(fts = fts_open(argv, ftsoptions, (int (*)())NULL))) {
(void)fprintf(stderr, "du: %s.\n", strerror(errno));
exit(1);
}
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_statb.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", kvalue ?
howmany(p->fts_number, 2) :
p->fts_number, 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_statb.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", kvalue ?
howmany(p->fts_statb.st_blocks, 2) :
p->fts_statb.st_blocks, p->fts_path);
p->fts_parent->fts_number += p->fts_statb.st_blocks;
}
exit(0);
}
typedef struct _ID {
dev_t dev;
ino_t inode;
} ID;
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_statb.st_ino;
dev = p->fts_statb.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 = (ID *)realloc((char *)files,
(u_int)(sizeof(ID) * (maxfiles += 128))))) {
(void)fprintf(stderr, "du: %s\n", strerror(errno));
exit(1);
}
files[nfiles].inode = ino;
files[nfiles].dev = dev;
++nfiles;
return(0);
}
usage()
{
(void)fprintf(stderr, "usage: du [-a | -s] [-kx] [file ...]\n");
exit(1);
}