support Irix; don't touch/remove /var/run/system_test_ifsetup multiple times

bin/tests/system/ifconfig.sh

@@ -57,12 +57,15 @@ case "$1" in
 		    *-pc-bsdi4.*)
 			ifconfig lo0 add 10.53.0.$ns
 			;;
+		    *-sgi-irix6.*)
+			/usr/etc/ifconfig lo0 alias 10.53.0.$ns
+			;;
 	            *)
 			echo "Don't know how to set up interface.  Giving up."
 			exit 1
 		esac
-		touch /var/run/system_test_ifsetup
 	done
+	touch /var/run/system_test_ifsetup
 	;;
 
     'stop')
@@ -93,12 +96,16 @@ case "$1" in
 		    *-pc-bsdi4.*)
 			ifconfig lo0 remove 10.53.0.$ns
 			;;
+		    *-sgi-irix6.*)
+			ifconfig lo0 -alias 10.53.0.$ns
+			;;
 	            *)
 			echo "Don't know how to destroy interface.  Giving up."
 			exit 1
 		esac
-		rm -f /var/run/system_test_ifsetup
 	done
+	rm -f /var/run/system_test_ifsetup
+	
 	;;
 
 	*)

bin/tests/system/run.sh

@@ -38,7 +38,9 @@ test -d $test || { echo "$0: $test: no such test" >&2; exit 1; }
 echo "S:`date`"
 echo "T:$test:1:A" >&2
 
+# Irix does not have /var/run
 test -f /var/run/system_test_ifsetup ||
+test -f /etc/system_test_ifsetup ||
     { echo "I:Interfaces not set up.  Not trying system tests." >&2;
       exit 0;
     }