Index: sbin/ifconfig/af_inet.c
===================================================================
RCS file: /home/ncvs/src/sbin/ifconfig/af_inet.c,v
retrieving revision 1.5.2.2.2.1
diff -u -r1.5.2.2.2.1 af_inet.c
--- sbin/ifconfig/af_inet.c	21 Dec 2010 17:09:25 -0000	1.5.2.2.2.1
+++ sbin/ifconfig/af_inet.c	11 Apr 2011 12:03:32 -0000
@@ -79,7 +79,10 @@
 	sin = (struct sockaddr_in *)ifa->ifa_netmask;
 	if (sin == NULL)
 		sin = &null_sin;
-	printf("netmask 0x%lx ", (unsigned long)ntohl(sin->sin_addr.s_addr));
+	if (dotmask)	
+		printf("netmask %s ", inet_ntoa(sin->sin_addr));
+	else
+		printf("netmask 0x%lx ", (unsigned long)ntohl(sin->sin_addr.s_addr));
 
 	if (ifa->ifa_flags & IFF_BROADCAST) {
 		sin = (struct sockaddr_in *)ifa->ifa_broadaddr;
Index: sbin/ifconfig/ifconfig.8
===================================================================
RCS file: /home/ncvs/src/sbin/ifconfig/ifconfig.8,v
retrieving revision 1.159.2.6.4.1
diff -u -r1.159.2.6.4.1 ifconfig.8
--- sbin/ifconfig/ifconfig.8	21 Dec 2010 17:09:25 -0000	1.159.2.6.4.1
+++ sbin/ifconfig/ifconfig.8	11 Apr 2011 12:03:32 -0000
@@ -40,6 +40,7 @@
 .Op Fl k
 .Op Fl m
 .Op Fl n
+.Op Fl t
 .Ar interface
 .Op Cm create
 .Op Ar address_family
@@ -56,6 +57,7 @@
 .Op Fl L
 .Op Fl d
 .Op Fl m
+.Op Fl t
 .Op Fl u
 .Op Fl v
 .Op Ar address_family
@@ -69,6 +71,7 @@
 .Op Fl d
 .Op Fl k
 .Op Fl m
+.Op Fl t
 .Op Fl u
 .Op Fl v
 .Op Fl C
@@ -2400,6 +2403,9 @@
 .Fl L
 flag is supplied, address lifetime is displayed for IPv6 addresses,
 as time offset string.
+The
+.Fl t
+flag makes IPv4 netmasks being displayed in dotted decimal notation.
 .Pp
 Optionally, the
 .Fl a
Index: sbin/ifconfig/ifconfig.c
===================================================================
RCS file: /home/ncvs/src/sbin/ifconfig/ifconfig.c,v
retrieving revision 1.146.2.5.4.1
diff -u -r1.146.2.5.4.1 ifconfig.c
--- sbin/ifconfig/ifconfig.c	21 Dec 2010 17:09:25 -0000	1.146.2.5.4.1
+++ sbin/ifconfig/ifconfig.c	11 Apr 2011 12:03:32 -0000
@@ -90,6 +90,7 @@
 int	clearaddr;
 int	newaddr = 1;
 int	verbose;
+int	dotmask;
 int	noload;
 
 int	supmedia = 0;
@@ -132,9 +133,9 @@
 	"usage: ifconfig %sinterface address_family [address [dest_address]]\n"
 	"                [parameters]\n"
 	"       ifconfig interface create\n"
-	"       ifconfig -a %s[-d] [-m] [-u] [-v] [address_family]\n"
+	"       ifconfig -a %s[-d] [-m] [-t] [-u] [-v] [address_family]\n"
 	"       ifconfig -l [-d] [-u] [address_family]\n"
-	"       ifconfig %s[-d] [-m] [-u] [-v]\n",
+	"       ifconfig %s[-d] [-m] [-t] [-u] [-v]\n",
 		options, options, options);
 	exit(1);
 }
@@ -156,7 +157,7 @@
 	all = downonly = uponly = namesonly = noload = verbose = 0;
 
 	/* Parse leading line options */
-	strlcpy(options, "adklmnuv", sizeof(options));
+	strlcpy(options, "adklmntuv", sizeof(options));
 	for (p = opts; p != NULL; p = p->next)
 		strlcat(options, p->opt, sizeof(options));
 	while ((c = getopt(argc, argv, options)) != -1) {
@@ -179,6 +180,9 @@
 		case 'n':	/* suppress module loading */
 			noload++;
 			break;
+		case 't':	/* show IPv4 netmask in dotted decimal notation */
+			dotmask++;
+			break;
 		case 'u':	/* restrict scan to "up" interfaces */
 			uponly++;
 			break;
@@ -199,8 +203,8 @@
 	argc -= optind;
 	argv += optind;
 
-	/* -l cannot be used with -a or -m */
-	if (namesonly && (all || supmedia))
+	/* -l cannot be used with -a, -m or -t */
+	if (namesonly && (all || supmedia || dotmask))
 		usage();
 
 	/* nonsense.. */
Index: sbin/ifconfig/ifconfig.h
===================================================================
RCS file: /home/ncvs/src/sbin/ifconfig/ifconfig.h,v
retrieving revision 1.24.2.1.6.1
diff -u -r1.24.2.1.6.1 ifconfig.h
--- sbin/ifconfig/ifconfig.h	21 Dec 2010 17:09:25 -0000	1.24.2.1.6.1
+++ sbin/ifconfig/ifconfig.h	11 Apr 2011 12:03:33 -0000
@@ -132,6 +132,7 @@
 extern	int printkeys;
 extern	int newaddr;
 extern	int verbose;
+extern	int dotmask;
 
 void	setifcap(const char *, int value, int s, const struct afswtch *);