diff --git a/sbin/mount/vfslist.c b/sbin/mount/vfslist.c
new file mode 100644
index 000000000000..1a00a235fd6c
--- /dev/null
+++ b/sbin/mount/vfslist.c
@@ -0,0 +1,92 @@
+/*
+ * Copyright (c) 1995
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * 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
+static char sccsid[] = "@(#)vfslist.c	8.1 (Berkeley) 5/8/95";
+#endif /* not lint */
+
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+int		  checkvfsname __P((const char *, const char **));
+const char	**makevfslist __P((char *));
+static int	  skipvfs;
+
+int
+checkvfsname(vfsname, vfslist)
+	const char *vfsname;
+	const char **vfslist;
+{
+
+	if (vfslist == NULL)
+		return (0);
+	while (*vfslist != NULL) {
+		if (strcmp(vfsname, *vfslist) == 0)
+			return (skipvfs);
+		++vfslist;
+	}
+	return (!skipvfs);
+}
+
+const char **
+makevfslist(fslist)
+	char *fslist;
+{
+	const char **av;
+	int i;
+	char *nextcp;
+
+	if (fslist == NULL)
+		return (NULL);
+	if (fslist[0] == 'n' && fslist[1] == 'o') {
+		fslist += 2;
+		skipvfs = 1;
+	}
+	for (i = 0, nextcp = fslist; *nextcp; nextcp++)
+		if (*nextcp == ',')
+			i++;
+	if ((av = malloc((size_t)(i + 2) * sizeof(char *))) == NULL) {
+		warn(NULL);
+		return (NULL);
+	}
+	nextcp = fslist;
+	i = 0;
+	av[i++] = nextcp;
+	while ((nextcp = strchr(nextcp, ',')) != NULL) {
+		*nextcp++ = '\0';
+		av[i++] = nextcp;
+	}
+	av[i++] = NULL;
+	return (av);
+}