plugin renamed socket_peercred -> unix_socket.

test added.

mysql-test/suite/plugins/r/unix_socket.result

@@ -0,0 +1,30 @@
+install plugin unix_socket soname 'auth_socket.so';
+#
+# with named user
+#
+create user USER identified via unix_socket;
+#
+# name match = ok
+#
+select user(), current_user(), database();
+user()	current_user()	database()
+USER@localhost	USER@%	test
+#
+# name does not match = failure
+#
+drop user USER;
+#
+# and now with anonymous user
+#
+grant SELECT ON test.* TO '' identified via unix_socket;
+#
+# name match = ok
+#
+select user(), current_user(), database();
+user()	current_user()	database()
+USER@localhost	@%	test
+#
+# name does not match = failure
+#
+delete from mysql.user where user='';
+uninstall plugin unix_socket;

mysql-test/suite/plugins/t/unix_socket.test

@@ -0,0 +1,56 @@
+--source include/not_embedded.inc
+
+if (!$AUTH_SOCKET_SO) {
+  skip No auth_socket plugin;
+}
+
+let $plugindir=`SELECT @@global.plugin_dir`;
+
+eval install plugin unix_socket soname '$AUTH_SOCKET_SO';
+
+--echo #
+--echo # with named user
+--echo #
+
+--replace_result $USER USER
+eval create user $USER identified via unix_socket;
+
+--write_file $MYSQLTEST_VARDIR/tmp/peercred_test.txt
+--replace_result $USER USER
+select user(), current_user(), database();
+EOF
+
+--echo #
+--echo # name match = ok
+--echo #
+--exec $MYSQL_TEST -u $USER --plugin-dir=$plugindir < $MYSQLTEST_VARDIR/tmp/peercred_test.txt
+
+--echo #
+--echo # name does not match = failure
+--echo #
+--error 1
+--exec $MYSQL_TEST -u foobar --plugin-dir=$plugindir < $MYSQLTEST_VARDIR/tmp/peercred_test.txt
+
+--replace_result $USER USER
+eval drop user $USER;
+
+--echo #
+--echo # and now with anonymous user
+--echo #
+grant SELECT ON test.* TO '' identified via unix_socket;
+--echo #
+--echo # name match = ok
+--echo #
+--exec $MYSQL_TEST -u $USER --plugin-dir=$plugindir < $MYSQLTEST_VARDIR/tmp/peercred_test.txt
+
+--echo #
+--echo # name does not match = failure
+--echo #
+--error 1
+--exec $MYSQL_TEST -u foobar --plugin-dir=$plugindir < $MYSQLTEST_VARDIR/tmp/peercred_test.txt
+
+# restoring mysql.user to the original state.
+delete from mysql.user where user='';
+uninstall plugin unix_socket;
+--remove_file $MYSQLTEST_VARDIR/tmp/peercred_test.txt
+

plugin/auth/auth_socket.c

@@ -83,27 +83,11 @@ static struct st_mysql_auth socket_auth_handler=
   socket_auth
 };
 
-mysql_declare_plugin(socket_auth)
-{
-  MYSQL_AUTHENTICATION_PLUGIN,
-  &socket_auth_handler,
-  "socket_peercred",
-  "Sergei Golubchik",
-  "Unix Socket based authentication",
-  PLUGIN_LICENSE_GPL,
-  NULL,
-  NULL,
-  0x0100,
-  NULL,
-  NULL,
-  NULL
-}
-mysql_declare_plugin_end;
 maria_declare_plugin(socket_auth)
 {
   MYSQL_AUTHENTICATION_PLUGIN,
   &socket_auth_handler,
-  "socket_peercred",
+  "unix_socket",
   "Sergei Golubchik",
   "Unix Socket based authentication",
   PLUGIN_LICENSE_GPL,