+#define LOCAL_PEERCRED 0x001 /* retrieve peer credentials */
+#define LOCAL_PEERPID 0x002 /* retrieve peer pid */
+#define LOCAL_PEEREPID 0x003 /* retrieve eff. peer pid */
+#define LOCAL_PEERUUID 0x004 /* retrieve peer UUID */
+#define LOCAL_PEEREUUID 0x005 /* retrieve eff. peer UUID */
+
+#endif /* (!_POSIX_C_SOURCE || _DARWIN_C_SOURCE) */