From f7fa522e95b52a6e94e2f48adc518be3d21154b9 Mon Sep 17 00:00:00 2001
From: Bill Paul <wpaul@FreeBSD.org>
Date: Sun, 12 Mar 1995 19:05:03 +0000
Subject: [PATCH] Impliment -ad and -au flags in addition to -a and document
 the change in the man page. ifconfig -au affects all interfaces marked as up,
 and ifconfig -ad affects only the interfaces marked down. ifconfig -a still
 handles everything. This change is purely for compatibility with SunOS, for
 those who might be accustomed to the SunOS ifconfig's behavior.

---
 sbin/ifconfig/ifconfig.8 | 17 ++++++++++++++++-
 sbin/ifconfig/ifconfig.c | 33 ++++++++++++++++++++++++++-------
 2 files changed, 42 insertions(+), 8 deletions(-)

diff --git a/sbin/ifconfig/ifconfig.8 b/sbin/ifconfig/ifconfig.8
index 6cdb45929e11..cb97093f2879 100644
--- a/sbin/ifconfig/ifconfig.8
+++ b/sbin/ifconfig/ifconfig.8
@@ -50,6 +50,10 @@
 .Op Ar protocol_family
 .Nm ifconfig
 .Ar -a
+.Nm ifconfig
+.Ar -au
+.Nm ifconfig
+.Ar -ad
 .Sh DESCRIPTION
 .Nm Ifconfig
 is used to assign an address
@@ -264,7 +268,18 @@ the hardware will be re-initialized.
 .Nm Ifconfig
 .Ar -a
 displays information on all interfaces.  When followed by a configuration
-parameter, will also set the configuration on all interfaces.
+parameter, it will also set the configuration on all interfaces.
+.Pp
+.Nm Ifconfig
+.Ar -au
+is similar to
+.Nm ifconfig
+.Ar -a ,
+except it only affects interfaces that are currently marked as up.
+Conversely,
+.Nm ifconfig
+.Ar -ad
+affects only interfaces that are marked down.
 .Pp
 .Nm Ifconfig
 displays the current configuration for a network interface
diff --git a/sbin/ifconfig/ifconfig.c b/sbin/ifconfig/ifconfig.c
index 66de006a4284..f62761ccfaad 100644
--- a/sbin/ifconfig/ifconfig.c
+++ b/sbin/ifconfig/ifconfig.c
@@ -207,13 +207,17 @@ main(argc, argv)
 		perror("ifconfig: socket");
 		exit(1);
 	}
-	if (!strcmp(name, "-a")) {
+	if (strstr(name, "-a")) {
 		struct ifconf ifc;
 #define MAX_INTERFACES 50	/* Yeah right. */
 		char buffer[MAX_INTERFACES * sizeof(struct ifreq)];
 		struct ifreq *ifptr, *end;
-		int ifflags;
+		int ifflags, selectflag = -1;
 
+		if (strstr(name, "-au"))
+			selectflag = 1;
+		if (strstr(name, "-ad"))
+			selectflag = 0;
 		ifc.ifc_len = sizeof(buffer);
 		ifc.ifc_buf = buffer;
 		if (ioctl(s, SIOCGIFCONF, (char *) &ifc) < 0) {
@@ -227,13 +231,12 @@ main(argc, argv)
 			sprintf(ifr.ifr_name,"%s",ifptr->ifr_name);
 			sprintf(name,"%s",ifptr->ifr_name);
 			close(s);
-			s = socket(af, SOCK_DGRAM, 0);
-			if (s < 0) {
+			if ((s = socket(af, SOCK_DGRAM, 0)) < 0) {
 				perror("ifconfig: socket");
 				exit(1);
 			}
 			if (ifptr->ifr_flags == ifflags)
-				ifconfig(argc,argv,af,rafp);
+				ifconfig(argc,argv,af,rafp,selectflag);
 			if(ifptr->ifr_addr.sa_len)	/* Dohw! */
 				ifptr = (struct ifreq *) ((caddr_t) ifptr +
 				ifptr->ifr_addr.sa_len -
@@ -241,23 +244,39 @@ main(argc, argv)
 			ifptr++;
 		}
 	} else
-		ifconfig(argc,argv,af,rafp);
+		ifconfig(argc,argv,af,rafp, -1);
 
 	exit (0);
 }
 
 
 
-ifconfig(argc,argv,af,rafp)
+ifconfig(argc,argv,af,rafp,flag)
 	int argc;
 	char *argv[];
 	int af;
 	struct afswtch *rafp;
+	int flag;
 {
 	if (ioctl(s, SIOCGIFFLAGS, (caddr_t)&ifr) < 0) {
 		Perror("ioctl (SIOCGIFFLAGS)");
 		exit(1);
 	}
+
+	switch(flag) {
+	case 0:
+		if (ifr.ifr_flags & IFF_UP)
+			return(0);
+		break;
+	case 1:
+		if (!(ifr.ifr_flags & IFF_UP))
+			return(0);
+		break;
+	case -1:
+	default:
+		break;
+	}
+
 	strncpy(ifr.ifr_name, name, sizeof ifr.ifr_name);
 	flags = ifr.ifr_flags;
 	if (ioctl(s, SIOCGIFMETRIC, (caddr_t)&ifr) < 0)