LOCAL_PEERCRED is also available on MacOS X.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@22140 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ext/socket/option.c

@@ -256,7 +256,7 @@ inspect_peercred(int level, int optname, VALUE data, VALUE ret)
 }
 #endif
 
-#if defined(LOCAL_PEERCRED) /* FreeBSD */
+#if defined(LOCAL_PEERCRED) /* FreeBSD, MacOS X */
 static int
 inspect_local_peercred(int level, int optname, VALUE data, VALUE ret)
 {

test/socket/test_unix.rb

@@ -313,7 +313,7 @@ class TestUNIXSocket < Test::Unit::TestCase
   end
 
   def test_getcred_xucred
-    return if /freebsd/ !~ RUBY_PLATFORM
+    return if /freebsd|darwin/ !~ RUBY_PLATFORM
     Dir.mktmpdir {|d|
       sockpath = "#{d}/sock"
       serv = Socket.unix_server_socket(sockpath)