add darwin:
$ hg diff test/javax/imageio/stream/StreamCloserLeak/run_test.sh
diff -r d4a63859633c test/javax/imageio/stream/StreamCloserLeak/run_test.sh
--- a/test/javax/imageio/stream/StreamCloserLeak/run_test.sh Wed Jun 15 11:49:10 2011 -0700
+++ b/test/javax/imageio/stream/StreamCloserLeak/run_test.sh Mon Jul 04 02:20:07 2011 -0700
@@ -92,6 +92,14 @@
       TMP="/tmp"
       ;;
 
+ Darwin )
+ VAR="A different value for Linux"
+ DEFAULT_JDK=/usr/local/java/jdk1.4/linux-i386
+ FILESEP="/"
+ PATHSEP=":"
+ TMP="/tmp"
+ ;;
+
    Windows_95 | Windows_98 | Windows_NT | Windows_ME | CYGWIN* )
       VAR="A different value for Win32"
       DEFAULT_JDK=/usr/local/java/jdk1.2/win32