Only in a/usr.bin/du: Makefile
diff -u -r a/usr.bin/du/du.1 b/usr.bin/du/du.1
--- a/usr.bin/du/du.1	Mon Mar 24 02:56:25 2008
+++ b/usr.bin/du/du.1	Mon Mar 24 02:59:40 2008
@@ -43,7 +43,7 @@
 .Op Fl H | L | P
 .Op Fl a | s | d Ar depth
 .Op Fl c
-.Op Fl h | k | m
+.Op Fl h | b | k | m
 .Op Fl n
 .Op Fl x
 .Op Fl I Ar mask
@@ -92,6 +92,8 @@
 directories deep.
 .It Fl c
 Display a grand total.
+.It Fl b
+Display block counts in bytes.
 .It Fl k
 Display block counts in 1024-byte (1-Kbyte) blocks.
 .It Fl m
diff -u -r a/usr.bin/du/du.c b/usr.bin/du/du.c
--- a/usr.bin/du/du.c	Mon Mar 24 02:56:25 2008
+++ b/usr.bin/du/du.c	Mon Mar 24 03:05:13 2008
@@ -90,20 +90,20 @@
 	int		ftsoptions;
 	int		listall;
 	int		depth;
-	int		Hflag, Lflag, Pflag, aflag, sflag, dflag, cflag, hflag, ch, notused, rval;
+	int		Hflag, Lflag, Pflag, aflag, bflag, sflag, dflag, cflag, hflag, ch, notused, rval;
 	char 		**save;
 	static char	dot[] = ".";
 
 	setlocale(LC_ALL, "");
 
-	Hflag = Lflag = Pflag = aflag = sflag = dflag = cflag = hflag = 0;
+	Hflag = Lflag = Pflag = aflag = bflag = sflag = dflag = cflag = hflag = 0;
 
 	save = argv;
 	ftsoptions = 0;
 	depth = INT_MAX;
 	SLIST_INIT(&ignores);
 
-	while ((ch = getopt(argc, argv, "HI:LPasd:chkmnrx")) != -1)
+	while ((ch = getopt(argc, argv, "HI:LPabsd:chkmnrx")) != -1)
 		switch (ch) {
 			case 'H':
 				Hflag = 1;
@@ -143,11 +143,17 @@
 				putenv("BLOCKSIZE=512");
 				hflag = 1;
 				break;
+			case 'b':
+				putenv("BLOCKSIZE=512");
+				bflag = 1;
+				break;
 			case 'k':
+				bflag = 0;
 				hflag = 0;
 				putenv("BLOCKSIZE=1024");
 				break;
 			case 'm':
+				bflag = 0;
 				hflag = 0;
 				putenv("BLOCKSIZE=1048576");
 				break;
@@ -213,8 +219,12 @@
 		argv[1] = NULL;
 	}
 
-	(void) getbsize(&notused, &blocksize);
-	blocksize /= 512;
+	if (!bflag) {
+		(void) getbsize(&notused, &blocksize);
+		blocksize /= 512;
+	} else {
+		blocksize=1;
+	}
 
 	rval = 0;
 
@@ -231,8 +241,13 @@
 				if (ignorep(p))
 					break;
 
-				p->fts_parent->fts_bignum +=
-				    p->fts_bignum += p->fts_statp->st_blocks;
+				if (!bflag) {
+					p->fts_parent->fts_bignum +=
+				    	p->fts_bignum += p->fts_statp->st_blocks;
+				} else {
+					p->fts_parent->fts_bignum +=
+					p->fts_bignum += p->fts_statp->st_size;
+				}
 
 				if (p->fts_level <= depth) {
 					if (hflag) {
@@ -261,18 +276,34 @@
 					break;
 
 				if (listall || p->fts_level == 0) {
-					if (hflag) {
-						(void) prthumanval(howmany(p->fts_statp->st_blocks,
-							blocksize));
-						(void) printf("\t%s\n", p->fts_path);
+					if (!bflag) {
+						if (hflag) {
+							(void) prthumanval(howmany(p->fts_statp->st_blocks,
+								blocksize));
+							(void) printf("\t%s\n", p->fts_path);
+						} else {
+							(void) printf("%jd\t%s\n",
+								(intmax_t)howmany(p->fts_statp->st_blocks, blocksize),
+								p->fts_path);
+						}
 					} else {
-						(void) printf("%jd\t%s\n",
-							(intmax_t)howmany(p->fts_statp->st_blocks, blocksize),
-							p->fts_path);
+						if (hflag) {
+                                                	(void) prthumanval(howmany(p->fts_statp->st_size,
+                                                        	blocksize));
+                                                	(void) printf("\t%s\n", p->fts_path);
+                                        	} else {
+                                                	(void) printf("%jd\t%s\n",
+                                                        	(intmax_t)howmany(p->fts_statp->st_size, blocksize),
+                                                        	p->fts_path);
+                                        	}
 					}
 				}
 
-				p->fts_parent->fts_bignum += p->fts_statp->st_blocks;
+				if (!bflag) {
+					p->fts_parent->fts_bignum += p->fts_statp->st_blocks;
+				} else {
+					p->fts_parent->fts_bignum += p->fts_statp->st_size;
+				}
 		}
 		savednumber = p->fts_parent->fts_bignum;
 	}
@@ -443,7 +474,7 @@
 usage(void)
 {
 	(void)fprintf(stderr,
-		"usage: du [-H | -L | -P] [-a | -s | -d depth] [-c] [-h | -k | -m] [-n] [-x] [-I mask] [file ...]\n");
+		"usage: du [-H | -L | -P] [-a | -s | -d depth] [-c] [-h | -k | -b | -m] [-n] [-x] [-I mask] [file ...]\n");
 	exit(EX_USAGE);
 }