Note that this is the second version of this patch.

Apply by doing:
	cd /usr/src
	patch -p0 < 002_fts.patch

And then rebuild and install libc:
	cd lib/libc
	make obj
	make depend
	make
	make install

You also need to rebuild the static binaries that use fts(3):
	foreach d ( bin/{chmod,cp,ls,pax,rm} usr.bin/cmp sbin/dump )
		cd /usr/src/$d
		make obj
		make depend
		make
		make install
	end

If you use sh/ksh/bash/zsh instead of csh/tcsh:
	for d in bin/{chmod,cp,ls,pax,rm} usr.bin/cmp sbin/dump; do
		cd /usr/src/$d
		make obj
		make obj
		make depend
		make
		make install
	done

Index: lib/libc/gen/fts.c
===================================================================
RCS file: /cvs/src/lib/libc/gen/fts.c,v
retrieving revision 1.24
diff -u -r1.24 fts.c
--- lib/libc/gen/fts.c	2000/08/24 17:04:12	1.24
+++ lib/libc/gen/fts.c	2001/05/31 21:56:56
@@ -61,7 +61,7 @@
 static int	 fts_palloc __P((FTS *, size_t));
 static FTSENT	*fts_sort __P((FTS *, FTSENT *, int));
 static u_short	 fts_stat __P((FTS *, FTSENT *, int));
-static int	 fts_safe_changedir __P((FTS *, FTSENT *, int));
+static int	 fts_safe_changedir __P((FTS *, FTSENT *, int, char *));
 
 #define	ISDOT(a)	(a[0] == '.' && (!a[1] || (a[1] == '.' && !a[2])))
 
@@ -69,7 +69,6 @@
 #define	ISSET(opt)	(sp->fts_options & (opt))
 #define	SET(opt)	(sp->fts_options |= (opt))
 
-#define	CHDIR(sp, path)	(!ISSET(FTS_NOCHDIR) && chdir(path))
 #define	FCHDIR(sp, fd)	(!ISSET(FTS_NOCHDIR) && fchdir(fd))
 
 /* fts_build flags */
@@ -346,7 +345,7 @@
 		 * FTS_STOP or the fts_info field of the node.
 		 */
 		if (sp->fts_child) {
-			if (fts_safe_changedir(sp, p, -1)) {
+			if (fts_safe_changedir(sp, p, -1, p->fts_accpath)) {
 				p->fts_errno = errno;
 				p->fts_flags |= FTS_DONTCHDIR;
 				for (p = sp->fts_child; p; p = p->fts_link)
@@ -457,11 +456,10 @@
 			return (NULL);
 		}
 		(void)close(p->fts_symfd);
-	} else if (!(p->fts_flags & FTS_DONTCHDIR)) {
-		if (CHDIR(sp, "..")) {
-			SET(FTS_STOP);
-			return (NULL);
-		}
+	} else if (!(p->fts_flags & FTS_DONTCHDIR) &&
+	    fts_safe_changedir(sp, p->fts_parent, -1, "..")) {
+		SET(FTS_STOP);
+		return (NULL);
 	}
 	p->fts_info = p->fts_errno ? FTS_ERR : FTS_DP;
 	return (sp->fts_cur = p);
@@ -646,7 +644,7 @@
 	 */
 	cderrno = 0;
 	if (nlinks || type == BREAD) {
-		if (fts_safe_changedir(sp, cur, dirfd(dirp))) {
+		if (fts_safe_changedir(sp, cur, dirfd(dirp), NULL)) {
 			if (nlinks && type == BREAD)
 				cur->fts_errno = errno;
 			cur->fts_flags |= FTS_DONTCHDIR;
@@ -808,8 +806,8 @@
 	 * can't get back, we're done.
 	 */
 	if (descend && (type == BCHILD || !nitems) &&
-	    (cur->fts_level == FTS_ROOTLEVEL ?
-	    FCHDIR(sp, sp->fts_rfd) : CHDIR(sp, ".."))) {
+	    (cur->fts_level == FTS_ROOTLEVEL ? FCHDIR(sp, sp->fts_rfd) :
+	    fts_safe_changedir(sp, cur->fts_parent, -1, ".."))) {
 		cur->fts_info = FTS_ERR;
 		SET(FTS_STOP);
 		return (NULL);
@@ -1086,10 +1084,11 @@
  * Assumes p->fts_dev and p->fts_ino are filled in.
  */
 static int
-fts_safe_changedir(sp, p, fd)
+fts_safe_changedir(sp, p, fd, path)
 	FTS *sp;
 	FTSENT *p;
 	int fd;
+	char *path;
 {
 	int ret, oerrno, newfd;
 	struct stat sb;
@@ -1097,7 +1096,7 @@
 	newfd = fd;
 	if (ISSET(FTS_NOCHDIR))
 		return (0);
-	if (fd < 0 && (newfd = open(p->fts_accpath, O_RDONLY, 0)) < 0)
+	if (fd < 0 && (newfd = open(path, O_RDONLY, 0)) < 0)
 		return (-1);
 	if (fstat(newfd, &sb)) {
 		ret = -1;