Support of AIX for auth_socket plugin

plugin/auth_socket/CMakeLists.txt

@@ -83,6 +83,19 @@ IF (HAVE_GETPEERUCRED AND HAVE_GETPWUID_POSIX_FINAL)
   SET(ok 1)
 ELSE()
 
+# AIX also!
+CHECK_CXX_SOURCE_COMPILES(
+"#include <sys/socket.h>
+int main() {
+  struct peercred_struct cred;
+  getsockopt(0, SOL_SOCKET, SO_PEERID, &cred, 0);
+  }" HAVE_PEERCRED_STRUCT)
+
+IF (HAVE_PEERCRED_STRUCT)
+  ADD_DEFINITIONS(-DHAVE_PEERCRED_STRUCT)
+  SET(ok 1)
+ELSE()
+
 # Who else? Anyone?
 # C'mon, show your creativity, be different! ifdef's are fun, aren't they?
 
@@ -90,6 +103,7 @@ ENDIF()
 ENDIF()
 ENDIF()
 ENDIF()
+ENDIF()
 
 IF(ok)
   MYSQL_ADD_PLUGIN(auth_socket auth_socket.c DEFAULT)

plugin/auth_socket/auth_socket.c

@@ -50,6 +50,12 @@
 #elif defined HAVE_GETPEERUCRED
 #include <ucred.h>
 
+#elif defined HAVE_PEERCRED_STRUCT
+#define level SOL_SOCKET
+#define SO_PEERCRED SO_PEERID
+#define uid euid
+#define ucred peercred_struct
+ 
 #else
 #error impossible
 #endif