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- /*
- * 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", ¬used, &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 */
- }
-