diff --git a/commands/Makefile b/commands/Makefile
index c237994a0..9dd01c41c 100644
--- a/commands/Makefile
+++ b/commands/Makefile
@@ -16,7 +16,7 @@ SUBDIR=	add_route arp ash at backup banner basename btrace cal \
 	less loadkeys loadramdisk logger look lp \
 	lpd ls lspci mail MAKEDEV \
 	mesg mined mkfifo \
-	mkproto mount mt netconf nice acknm nohup \
+	mount mt netconf nice acknm nohup \
 	nonamed od paste patch \
 	ping postinstall poweroff pr prep printf printroot \
 	profile progressbar pr_routes ps pwd pwdauth \
diff --git a/man/man1/Makefile b/man/man1/Makefile
index b0563b34c..9ee8eec3c 100644
--- a/man/man1/Makefile
+++ b/man/man1/Makefile
@@ -10,7 +10,7 @@ MAN=	ash.1 at.1 banner.1 basename.1 \
 	install.1 isodir.1 isoinfo.1 isoread.1 join.1 kill.1 \
 	last.1 loadfont.1 loadkeys.1 logger.1 \
 	look.1 lp.1 ls.1 lspci.1 mail.1  \
-	mesg.1 mixer.1 mkfs.1 \
+	mesg.1 mixer.1 mkfs.mfs.1 \
 	mkproto.1 mount.1 mt.1 nice.1 nm.1 nohup.1 od.1 \
 	paste.1 ping.1 playwave.1 pr.1 prep.1 \
 	profile.1 ps.1 pwd.1 rcp.1 recwave.1 \
diff --git a/man/man1/mkfs.mfs.1 b/man/man1/mkfs.mfs.1
new file mode 100644
index 000000000..2b2361739
--- /dev/null
+++ b/man/man1/mkfs.mfs.1
@@ -0,0 +1,113 @@
+.TH MKFS 1
+.SH NAME
+mkfs \- make a file system
+.SH SYNOPSIS
+\fBmkfs \fR[\fB\-Ldot\fR] [\fB\-B \fIblocksize\fR] [\fB\-i \fIinodes\fR] [\fB\-b \fIblocks\fR] \fIspecial \fIprototype\fR
+.br
+.de FL
+.TP
+\\fB\\$1\\fR
+\\$2
+..
+.de EX
+.TP 20
+\\fB\\$1\\fR
+# \\$2
+..
+.SH OPTIONS
+.TP 5
+.B \-L
+# Make a listing on standard output
+.TP 5
+.B \-d
+# Use mod time of \fImkfs\fR binary for all files
+.TP 5
+.B \-o
+# Use a drive other than 0 or 1 (safety precaution)
+.TP 5
+.B \-t
+# Do not test if file system fits on the medium
+.TP 5
+.B \-1
+# Make a version 1 file system (for backward compatibility)
+.TP 5
+.B \-i
+# Number of i-nodes (files)
+.TP 5
+.B \-B
+# Filesystem block size (in bytes)
+.TP 5
+.B \-b
+# Filesystem size (in blocks)
+.TP 5
+.B \-x
+# Extra space after dynamic sizing (blocks and inodes)
+.SH EXAMPLES
+.TP 20
+.B mkfs /dev/fd1 proto
+# Make a file system on \fI/dev/fd1\fR
+.TP 20
+.B mkfs -b 360 /dev/fd1
+# Make empty 360 block file system
+.TP 20
+.B mkfs /dev/fd1 360
+# Alternate way to specify the size
+.SH DESCRIPTION
+.PP
+.I Mkfs
+builds a file system and copies specified files to it.
+The prototype file tells which directories and files to copy to it.
+If the prototype file cannot be opened, and its name is just a string of
+digits, an empty file system will be made with the specified number of
+blocks.
+A sample prototype file follows.
+The text following the \fI#\fR sign in the example below is comment.
+In real prototype files, comments are not allowed.
+.PP
+.nf
+.ta 0.20i 0.70i 1.10i 3i 3.5i 4i
+	boot			# boot block file (ignored)
+	360 63			# blocks and i-nodes
+	d--755 1 1		# root directory
+	   bin	d--755 \|2 1	# bin dir: mode (755), uid (2), gid (1)
+		sh	\|---755 2 1 /user/bin/shell	# shell has mode \fIrwxr-xr-x\fP
+		mv	-u-755 2 1 /user/bin/mv	# u = SETUID bit
+		login	-ug755 2 1 /user/bin/login	# SETUID and SETGID
+	   $			# end of \fI/bin\fP
+	   dev	d--755 2 1	# special files: tty (char), fd0 (block)
+		tty	c--777 2 1 4 0	# uid=2, gid=1, major=4, minor=0
+		fd0	b--644 2 1 2 0 360	# uid, gid, major, minor, blocks
+	   $			# end of \fI/dev\fP
+	   user	d--755 12 1	# user dir: mode (755), uid (12), gid (1)
+		ast	d--755 12 1	# \fI/user/ast\fP
+		$		# \fI/user/ast\fP is empty
+	   $			# end of \fI/user\fP
+	$			# end of root directory
+.PP
+.fi
+The first entry on each line (except the first 3 and the $ lines, which
+terminate directories) is the name the file or directory will get on the
+new file system.  
+Next comes its mode, with the first character being
+\fB\-dbc\fR for regular files, directories, block special files and character 
+special files, respectively.
+The next two characters are used to specify the SETUID and SETGID bits, as
+shown above.
+The last three characters of the mode are the 
+.I rwx
+protection bits.
+.PP
+Following the mode are the uid and gid.
+For special files, the major and minor devices are needed.
+.PP
+The maximum size of a file system is 1 Gb for a version 2 file system,
+and 64 Mb for a version 1 file system.  Alas the 8086
+.I fsck
+runs out of memory on a V2 file system larger than 128 Mb, so for the 8086
+version of
+\s-1MINIX 3\s-1
+you have to limit yourself to file systems of that size.
+.SH "SEE ALSO"
+.BR mkproto (1),
+.BR fsck (1),
+.BR mount (1).
diff --git a/tools/mkproto/Makefile b/tools/mkproto/Makefile
new file mode 100644
index 000000000..6f2350c38
--- /dev/null
+++ b/tools/mkproto/Makefile
@@ -0,0 +1,7 @@
+
+HOSTPROGNAME=	${_TOOL_PREFIX}mkproto
+HOST_SRCDIR=	usr.sbin/mkproto
+#CPPFLAGS+= 	-I${.CURDIR}/../compat/sys
+
+LDADD=  #defined
+.include "${.CURDIR}/../Makefile.host"
diff --git a/usr.sbin/Makefile b/usr.sbin/Makefile
index ec3aa1d6b..0c19679f8 100644
--- a/usr.sbin/Makefile
+++ b/usr.sbin/Makefile
@@ -14,6 +14,7 @@ SUBDIR= \
 	zic
 
 # LSC MINIX Specific
-SUBDIR+= mkfs.mfs
+SUBDIR+= mkfs.mfs \
+	mkproto
 
 .include <bsd.subdir.mk>
diff --git a/usr.sbin/mkfs.mfs/mkfs.c b/usr.sbin/mkfs.mfs/mkfs.c
index 8e8649be2..1cbc761b7 100644
--- a/usr.sbin/mkfs.mfs/mkfs.c
+++ b/usr.sbin/mkfs.mfs/mkfs.c
@@ -92,6 +92,7 @@ block_t zone_map;		/* where is zone map? (depends on # inodes) */
 int inodes_per_block;
 int fs_version;
 size_t block_size;
+int extra_space_percent;
 
 FILE *proto;
 
@@ -178,7 +179,8 @@ char *argv[];
   fs_version = 3;
   inodes_per_block = 0;
   block_size = 0;
-  while ((ch = getopt(argc, argv, "12b:di:lotB:")) != EOF)
+  extra_space_percent = 0;
+  while ((ch = getopt(argc, argv, "12b:di:lotB:x:")) != EOF)
 	switch (ch) {
 	    case '1':
 		fs_version = 1;
@@ -201,11 +203,17 @@ char *argv[];
 	    case 'o':	override = 1;	break;
 	    case 't':	donttest = 1;	break;
 	    case 'B':	block_size = atoi(optarg);	break;
+	    case 'x':	extra_space_percent = atoi(optarg); break;
 	    default:	usage();
 	}
 
   if (argc == optind) usage();
 
+  /* Percentage of extra size must be nonnegative.
+   * It can legitimately be bigger than 100 but has to make some sort of sense.
+   */
+  if(extra_space_percent < 0 || extra_space_percent > 2000) usage();
+
   if(fs_version == 3) {
   	if(!block_size) block_size = _MAX_BLOCK_SIZE; /* V3 default block size */
   	if(block_size%SECTOR_SIZE || block_size < _MIN_BLOCK_SIZE) {
@@ -283,10 +291,16 @@ char *argv[];
 	usrid = atoi(token[1]);
 	grpid = atoi(token[2]);
 
-	if(blocks == 0 && inodes == 0){
+	if(blocks <= 0 && inodes <= 0){
+  		block_t extrablocks = 0;
+  		ino_t extrainodes = 0;
+		if(blocks < 0) extrablocks = -blocks;
+		if(inodes < 0) extrainodes = -inodes;
 		detect_fs_size();
-		blocks = blockcount;
-		inodes = inocount;
+		blocks = blockcount + extrablocks;
+		inodes = inocount + extrainodes;
+		blocks += blocks*extra_space_percent/100;
+		inodes += inodes*extra_space_percent/100;
 		printf("dynamically sized filesystem: %d blocks, %d inodes\n", blocks, 
 			(unsigned int) inodes);
 	}		
@@ -699,7 +713,6 @@ ino_t parent;
 	mode = mode_con(p);
 	usrid = atoi(token[2]);
 	grpid = atoi(token[3]);
-	if (grpid & 0200) fprintf(stderr, "A.S.Tanenbaum\n");
 	n = alloc_inode(mode, usrid, grpid);
 
 	/* Enter name in directory and update directory's size. */
@@ -1487,7 +1500,8 @@ block_t n;
 void usage()
 {
   fprintf(stderr,
-	  "Usage: %s [-12dlot] [-b blocks] [-i inodes] [-B blocksize] special [proto]\n",
+	  "Usage: %s [-12dlot] [-b blocks] [-i inodes]\n"
+	  	"\t[-x extra] [-B blocksize] special [proto]\n",
 	  progname);
   exit(1);
 }
diff --git a/commands/mkproto/Makefile b/usr.sbin/mkproto/Makefile
similarity index 100%
rename from commands/mkproto/Makefile
rename to usr.sbin/mkproto/Makefile
diff --git a/commands/mkproto/mkproto.c b/usr.sbin/mkproto/mkproto.c
similarity index 100%
rename from commands/mkproto/mkproto.c
rename to usr.sbin/mkproto/mkproto.c