diff --git a/usr.bin/ar/ar.c b/usr.bin/ar/ar.c
index c53c1e44dcfa..73dab413df47 100644
--- a/usr.bin/ar/ar.c
+++ b/usr.bin/ar/ar.c
@@ -51,6 +51,7 @@ static const char sccsid[] = "@(#)ar.c	8.3 (Berkeley) 4/2/94";
 #include <ar.h>
 #include <dirent.h>
 #include <err.h>
+#include <libgen.h>
 #include <paths.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ -178,7 +179,7 @@ main(argc, argv)
 			warnx("no position operand specified");
 			usage();
 		}
-		posname = rname(posarg);
+		posname = basename(posarg);
 	}
 	/* -d only valid with -Tv. */
 	if (options & AR_D && options & ~(AR_D|AR_TR|AR_V))
diff --git a/usr.bin/ar/archive.c b/usr.bin/ar/archive.c
index 71606bd3efb6..32cdfa6a3470 100644
--- a/usr.bin/ar/archive.c
+++ b/usr.bin/ar/archive.c
@@ -36,6 +36,8 @@
 
 #ifndef lint
 static const char sccsid[] = "@(#)archive.c	8.3 (Berkeley) 4/2/94";
+static const char rcsid[] =
+  "$FreeBSD$";
 #endif /* not lint */
 
 #include <sys/param.h>
@@ -46,6 +48,7 @@ static const char sccsid[] = "@(#)archive.c	8.3 (Berkeley) 4/2/94";
 #include <err.h>
 #include <errno.h>
 #include <fcntl.h>
+#include <libgen.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -210,7 +213,7 @@ put_arobj(cfp, sb)
 	 * the last header read.
 	 */
 	if (sb) {
-		name = rname(cfp->rname);
+		name = basename(cfp->rname);
 		(void)fstat(cfp->rfd, sb);
 
 		/*
diff --git a/usr.bin/ar/extern.h b/usr.bin/ar/extern.h
index a6d7d71976f9..0efb771d988b 100644
--- a/usr.bin/ar/extern.h
+++ b/usr.bin/ar/extern.h
@@ -31,6 +31,7 @@
  * SUCH DAMAGE.
  *
  *	@(#)extern.h	8.3 (Berkeley) 4/2/94
+ * $FreeBSD$
  */
 
 int	append __P((char **));
@@ -45,7 +46,6 @@ int	move __P((char **));
 void	orphans __P((char **argv));
 int	print __P((char **));
 int	replace __P((char **));
-char   *rname __P((char *));
 int	tmp __P((void));
 
 extern char *archive;
diff --git a/usr.bin/ar/misc.c b/usr.bin/ar/misc.c
index 026c45dcf598..d99d9564962e 100644
--- a/usr.bin/ar/misc.c
+++ b/usr.bin/ar/misc.c
@@ -36,6 +36,8 @@
 
 #ifndef lint
 static const char sccsid[] = "@(#)misc.c	8.3 (Berkeley) 4/2/94";
+static const char rcsid[] =
+  "$FreeBSD$";
 #endif /* not lint */
 
 #include <sys/param.h>
@@ -43,6 +45,7 @@ static const char sccsid[] = "@(#)misc.c	8.3 (Berkeley) 4/2/94";
 #include <dirent.h>
 #include <err.h>
 #include <errno.h>
+#include <libgen.h>
 #include <signal.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ -113,21 +116,12 @@ orphans(argv)
 		warnx("%s: not found in archive", *argv);
 }
 
-char *
-rname(path)
-	char *path;
-{
-	char *ind;
-
-	return ((ind = strrchr(path, '/')) ? ind + 1 : path);
-}
-
 int
 compare(dest)
 	char *dest;
 {
 	int maxname = (options & AR_TR) ? OLDARMAXNAME : MAXNAMLEN;
-	return (!strncmp(chdr.name, rname(dest), maxname));
+	return (!strncmp(chdr.name, basename(dest), maxname));
 }
 
 void