Enable 'ifconfig -C' (list dynamic interface types) on install

media. Use this feature in install scripts to eliminate manually
maintained list of dynamic interface types.

'-C' brought to my attention by reyk@, tweaks to install script to
use -C in get_ifdevs() from rpe@.

ok rpe@ deraadt@

2 files changed, 20 insertions, 34 deletions

diff --git a/distrib/miniroot/install.sub b/distrib/miniroot/install.sub
index b45ad8e0172..3035282cce2 100644
--- a/distrib/miniroot/install.sub
+++ b/distrib/miniroot/install.sub
@@ -1,4 +1,4 @@
-#	$OpenBSD: install.sub,v 1.803 2014/12/29 17:04:19 deraadt Exp $
+#	$OpenBSD: install.sub,v 1.804 2015/01/01 22:53:39 krw Exp $
 #
 # Copyright (c) 1997-2009 Todd Miller, Theo de Raadt, Ken Westerback
 # All rights reserved.
@@ -161,9 +161,12 @@ get_cddevs () {
 }
 
 get_ifdevs() {
-	ifconfig "$@" 2>/dev/null |
-		egrep -v '^[[:space:]]|(bridge|enc|gif|gre|lo|pflog|pfsync|ppp|tun)[[:digit:]]+:' |
-		sed -n 's/^\(.*\):.*/\1/p'
+	local _if _iflist=$(ifconfig -C)
+
+	for _if in $(ifconfig "$@" 2>/dev/null |
+		sed -n 's/^\([^[:space:]]*\):.*/\1/p'); do
+		isin ${_if%%[0-9]*} $_iflist || echo $_if
+	done
 }
 
 get_drive() {
@@ -1125,28 +1128,19 @@ enable_network() {
 	for hn in /mnt/etc/hostname.*; do
 		# Strip off prefix to get interface name.
 		if=${hn#/mnt/etc/hostname.}
-		# Check for ifconfig'able interface.
-		(ifconfig $if||ifconfig $if create) >/dev/null 2>&1 || continue
-		# Don't immediately do interfaces constructed from others.
-		# Skip uninteresting devices.
-		case ${if%%[0-9]*} in
-		trunk)	_trunks="$_trunks $hn"
-			continue
-		       ;;
-		svlan)	_svlans="$_svlans $hn"
-			continue
-			;;
-		vlan)	_vlans="$_vlans $hn"
-			continue
-			;;
-		bridge|carp|enc|gif|gre|lo|pflog|pfsync|ppp|tun)
-			continue
-			;;
-		esac
-		# Now parse the hostname.* file
-		ifstart $hn
+		if isin ${if%%[0-9]*} $(ifconfig -C); then
+			# Dynamic interfaces must be done later.
+			case ${if%%[0-9]*} in
+			trunk)	_trunks="$_trunks $hn"	;;
+			svlan)	_svlans="$_svlans $hn"	;;
+			vlan)	_vlans="$_vlans $hn"	;;
+			esac
+		else
+			# 'real' interfaces (if available) are done now.
+			ifconfig $if >/dev/null 2>&1 && ifstart $hn
+		fi
 	done
-	# Configure any constructed interfaces now that 'real' ones are up.
+	# Configure any dynamic interfaces now that 'real' ones are up.
 	# ORDER IS IMPORTANT! (see /etc/netstart)
 	for hn in $_trunks $_svlans $_vlans; do
 		ifstart $hn
diff --git a/sbin/ifconfig/ifconfig.c b/sbin/ifconfig/ifconfig.c
index 74c463aac3a..a32940ec4b5 100644
--- a/sbin/ifconfig/ifconfig.c
+++ b/sbin/ifconfig/ifconfig.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: ifconfig.c,v 1.289 2014/11/14 15:09:29 tedu Exp $	*/
+/*	$OpenBSD: ifconfig.c,v 1.290 2015/01/01 22:53:39 krw Exp $	*/
 /*	$NetBSD: ifconfig.c,v 1.40 1997/10/01 02:19:43 enami Exp $	*/
 
 /*
@@ -581,9 +581,7 @@ main(int argc, char *argv[])
 {
 	const struct afswtch *rafp = NULL;
 	int create = 0;
-#ifndef SMALL
 	int Cflag = 0;
-#endif
 	int gflag = 0;
 	int i;
 	int noprint = 0;
@@ -612,12 +610,10 @@ main(int argc, char *argv[])
 			case 'g':
 				gflag = 1;
 				break;
-#ifndef SMALL
 			case 'C':
 				Cflag = 1;
 				nomore = 1;
 				break;
-#endif
 			default:
 				usage(1);
 				break;
@@ -644,14 +640,12 @@ main(int argc, char *argv[])
 		rafp = afp;
 		af = ifr.ifr_addr.sa_family = rafp->af_af;
 	}
-#ifndef SMALL
 	if (Cflag) {
 		if (argc > 0 || aflag)
 			usage(1);
 		list_cloners();
 		exit(0);
 	}
-#endif
 	if (gflag) {
 		if (argc == 0)
 			printgroupattribs(name);
@@ -1052,7 +1046,6 @@ clone_destroy(const char *addr, int param)
 		err(1, "SIOCIFDESTROY");
 }
 
-#ifndef SMALL
 void
 list_cloners(void)
 {
@@ -1095,7 +1088,6 @@ list_cloners(void)
 	putchar('\n');
 	free(buf);
 }
-#endif
 
 #define RIDADDR 0
 #define ADDR	1