Index: walk.c
===================================================================
--- walk.c	(revision 246091)
+++ walk.c	(working copy)
@@ -59,7 +59,6 @@
 static	void	 apply_specentry(const char *, NODE *, fsnode *);
 static	fsnode	*create_fsnode(const char *, const char *, const char *,
 			       struct stat *);
-static	fsinode	*link_check(fsinode *);
 
 
 /*
@@ -644,7 +643,7 @@
 /* This was borrowed from du.c and tweaked to keep an fsnode 
  * pointer instead. -- dbj@netbsd.org
  */
-static fsinode *
+fsinode *
 link_check(fsinode *entry)
 {
 	static struct entry {
Index: makefs.c
===================================================================
--- makefs.c	(revision 246091)
+++ makefs.c	(working copy)
@@ -73,6 +73,7 @@
 };
 
 u_int		debug;
+int		dupsok;
 struct timespec	start_time;
 
 static	fstype_t *get_fstype(const char *);
@@ -112,7 +113,7 @@
 	start_time.tv_sec = start.tv_sec;
 	start_time.tv_nsec = start.tv_usec * 1000;
 
-	while ((ch = getopt(argc, argv, "B:b:d:f:F:M:m:N:o:ps:S:t:x")) != -1) {
+	while ((ch = getopt(argc, argv, "B:b:Dd:f:F:M:m:N:o:ps:S:t:x")) != -1) {
 		switch (ch) {
 
 		case 'B':
@@ -148,6 +149,10 @@
 			}
 			break;
 
+		case 'D':
+			dupsok = 1;
+			break;
+
 		case 'd':
 			debug = strtoll(optarg, NULL, 0);
 			break;
Index: makefs.h
===================================================================
--- makefs.h	(revision 246091)
+++ makefs.h	(working copy)
@@ -167,7 +167,7 @@
 void		cd9660_cleanup_opts(fsinfo_t *);
 void		cd9660_makefs(const char *, const char *, fsnode *, fsinfo_t *);
 
-
+extern	int		dupsok;
 extern	u_int		debug;
 extern	struct timespec	start_time;
 
@@ -279,6 +279,8 @@
 struct fs;
 void   ffs_fragacct_swap(struct fs *, int, int32_t [], int, int);
 
+fsinode *link_check(fsinode *);
+
 /*
  * Declarations for compat routines.
  */
Index: mtree.c
===================================================================
--- mtree.c	(revision 246091)
+++ mtree.c	(working copy)
@@ -508,8 +508,8 @@
 {
 	char keyword[PATH_MAX];
 	char *name, *p, *value;
-	struct group *grent;
-	struct passwd *pwent;
+	gid_t gid;
+	uid_t uid;
 	struct stat *st, sb;
 	intmax_t num;
 	u_long flset, flclr;
@@ -585,11 +585,10 @@
 					error = ENOATTR;
 					break;
 				}
-				grent = getgrnam(value);
-				if (grent != NULL)
-					st->st_gid = grent->gr_gid;
+				if (gid_from_group(value, &gid) == 0)
+					st->st_gid = gid;
 				else
-					error = errno;
+					error = EINVAL;
 			} else
 				error = ENOSYS;
 			break;
@@ -698,11 +697,10 @@
 					error = ENOATTR;
 					break;
 				}
-				pwent = getpwnam(value);
-				if (pwent != NULL)
-					st->st_uid = pwent->pw_uid;
+				if (uid_from_user(value, &uid) == 0)
+					st->st_uid = uid;
 				else
-					error = errno;
+					error = EINVAL;
 			} else
 				error = ENOSYS;
 			break;
@@ -781,6 +779,24 @@
 		return (0);
 	}
 
+	/*
+         * Check for hardlinks. If the contents key is used, then the check
+         * will only trigger if the contents file is a link even if it is used
+         * by more than one file
+	 */
+	if (sb.st_nlink > 1) {
+		fsinode *curino;
+
+		st->st_ino = sb.st_ino;
+		st->st_dev = sb.st_dev;
+		curino = link_check(node->inode);
+		if (curino != NULL) {
+			free(node->inode);
+			node->inode = curino;
+			node->inode->nlink++;
+		}
+	}
+
 	free(node->contents);
 	node->contents = name;
 	st->st_size = sb.st_size;
@@ -881,8 +897,12 @@
 
 		if (strcmp(name, node->name) == 0) {
 			if (def == true) {
-				mtree_error("duplicate definition of %s",
-				    name);
+				if (!dupsok)
+					mtree_error("duplicate definition of %s",
+					    name);
+				else
+					mtree_warning("duplicate definition "
+					    "of %s", name);
 				return (0);
 			}
 
@@ -970,15 +990,15 @@
 		do {
 			*cp++ = '\0';
 
-			/* Disallow '.' and '..' as components. */
-			if (IS_DOT(pathspec) || IS_DOTDOT(pathspec)) {
-				mtree_error("absolute path cannot contain . "
-				    "or .. components");
+			/* Disallow '..' as a component. */
+			if (IS_DOTDOT(pathspec)) {
+				mtree_error("absolute path cannot contain "
+				    ".. component");
 				goto out;
 			}
 
-			/* Ignore multiple adjacent slashes. */
-			if (pathspec[0] != '\0')
+			/* Ignore multiple adjacent slashes and '.'. */
+			if (pathspec[0] != '\0' && !IS_DOT(pathspec))
 				error = read_mtree_spec1(fp, false, pathspec);
 			memmove(pathspec, cp, strlen(cp) + 1);
 			cp = strchr(pathspec, '/');
Index: makefs.8
===================================================================
--- makefs.8	(revision 246091)
+++ makefs.8	(working copy)
@@ -43,7 +43,7 @@
 .Nd create a file system image from a directory tree or a mtree manifest
 .Sh SYNOPSIS
 .Nm
-.Op Fl px
+.Op Fl Dpx
 .Op Fl B Ar byte-order
 .Op Fl b Ar free-blocks
 .Op Fl d Ar debug-mask
@@ -106,6 +106,8 @@
 suffix may be provided to indicate that
 .Ar free-blocks
 indicates a percentage of the calculated image size.
+.It Fl D
+Treat duplicate paths in an mtree manifest as warnings not error.
 .It Fl d Ar debug-mask
 Enable various levels of debugging, depending upon which bits are
 set in