Index: ar/ar.1
===================================================================
--- ar/ar.1
+++ ar/ar.1
@@ -23,7 +23,7 @@
 .\"
 .\" $Id$
 .\"
-.Dd December 10, 2012
+.Dd July 23, 2015
 .Os
 .Dt AR 1
 .Sh NAME
@@ -66,6 +66,7 @@
 .Op Fl f
 .Op Fl F Ar flavor | Fl -flavor Ar flavor
 .Op Fl s | Fl S
+.Op Fl U
 .Op Fl v
 .Op Fl z
 .Ar archive
@@ -83,6 +84,7 @@
 .Op Fl j
 .Op Fl s | Fl S
 .Op Fl u
+.Op Fl U
 .Op Fl v
 .Op Fl z
 .Ar archive
@@ -91,6 +93,7 @@
 .Fl s
 .Op Fl D
 .Op Fl j
+.Op Fl U
 .Op Fl z
 .Ar archive
 .Nm
@@ -203,6 +206,12 @@
 .Ar .
 This ensures that checksums on the resulting archives are reproducible
 when member contents are identical.
+If the
+.It Fl D
+and
+.It Fl U
+options are both specified, the one specified later in the command line
+takes effect.
 .It Fl f
 Synonymous with option
 .Fl T .
@@ -335,6 +344,20 @@
 .Ar
 will be extracted only if they are newer than the corresponding
 files in the file system.
+.It Fl U
+When used in combination with the
+.Fl r
+or
+.Fl q
+option, insert the real mtime, uid and gid, and file mode values
+from the members named by arguments
+.Ar .
+If the
+.It Fl D
+and
+.It Fl U
+options are both specified, the one specified later in the command line
+takes effect.
 .It Fl v
 Provide verbose output.
 When used with the
Index: ar/ar.c
===================================================================
--- ar/ar.c
+++ ar/ar.c
@@ -123,7 +123,7 @@
 	len = strlen(bsdar->progname);
 	if (len >= strlen("ranlib") &&
 	    strcmp(bsdar->progname + len - strlen("ranlib"), "ranlib") == 0) {
-		while ((opt = getopt_long(argc, argv, "tDV", longopts,
+		while ((opt = getopt_long(argc, argv, "tDUV", longopts,
 		    NULL)) != -1) {
 			switch(opt) {
 			case 't':
@@ -132,6 +132,9 @@
 			case 'D':
 				bsdar->options |= AR_D;
 				break;
+			case 'U':
+				bsdar->options &= ~AR_D;
+				break;
 			case 'V':
 				bsdar_version();
 				break;
@@ -169,7 +172,7 @@
 		}
 	}
 
-	while ((opt = getopt_long(argc, argv, "abCcdDfF:ijlMmopqrSsTtuVvxz",
+	while ((opt = getopt_long(argc, argv, "abCcdDfF:ijlMmopqrSsTtUuVvxz",
 	    longopts, NULL)) != -1) {
 		switch(opt) {
 		case 'a':
@@ -237,6 +240,9 @@
 		case 't':
 			set_mode(bsdar, opt);
 			break;
+		case 'U':
+			bsdar->options &= ~AR_D;
+			break;
 		case 'u':
 			bsdar->options |= AR_U;
 			break;
@@ -400,7 +406,8 @@
   -D            Use fixed metadata, for consistent archive checksums.\n\
   -F FORMAT | --flavor=FORMAT\n\
                 Create archives with the specified format.\n\
-  -S            Do not generate an archive symbol table.\n"
+  -S            Do not generate an archive symbol table.\n\
+  -U            Use original metadata, for unique archive checksums.\n"
 
 static void
 bsdar_usage(void)
@@ -415,6 +422,7 @@
   Options:\n\
   -t              (This option is accepted, but ignored).\n\
   -D              Use fixed metadata, for consistent archive checksums.\n\
+  -U              Use original metadata, for unique archive checksums.\n\
   -V              Print a version identifier and exit.\n"
 
 static void