print error log when rename failed and make thread into dead loop

unittest/logservice/test_log_io_utils.cpp

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+/**
+ * Copyright (c) 2021 OceanBase
+ * OceanBase CE is licensed under Mulan PubL v2.
+ * You can use this software according to the terms and conditions of the Mulan PubL v2.
+ * You may obtain a copy of Mulan PubL v2 at:
+ *          http://license.coscl.org.cn/MulanPubL-2.0
+ * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
+ * EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
+ * MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
+ * See the Mulan PubL v2 for more details.
+ */
+
+#include <gtest/gtest.h>
+#include "lib/ob_define.h"
+#include "logservice/palf/log_io_utils.h"
+
+namespace oceanbase
+{
+namespace palf
+{
+using namespace common;
+using namespace palf;
+
+TEST(TestLogIOUtils, test_rename)
+{
+  EXPECT_EQ(OB_INVALID_ARGUMENT, renameat_with_retry(-1, NULL, -1, NULL));
+  EXPECT_EQ(OB_INVALID_ARGUMENT, rename_with_retry(NULL, NULL));
+
+  const char *src_name = "src_file";
+  const char *dest_name = "src_file.tmp";
+  const char *curr_dir_name  = get_current_dir_name();
+  int dir_fd = 0;
+  system("rm -rf src_file*");
+  EXPECT_LE(0, dir_fd = ::open(curr_dir_name, O_DIRECTORY | O_RDONLY));
+  EXPECT_EQ(false, check_rename_success(src_name, dest_name));
+  EXPECT_EQ(false, check_renameat_success(dir_fd, src_name, dir_fd, dest_name));
+  const char *touch_dest_cmd = "touch src_file.tmp";
+  const char *touch_src_cmd = "touch src_file";
+  system(touch_dest_cmd);
+  EXPECT_EQ(true, check_rename_success(src_name, dest_name));
+  EXPECT_EQ(true, check_renameat_success(dir_fd, src_name, dir_fd, dest_name));
+  system(touch_src_cmd);
+  EXPECT_EQ(false, check_rename_success(src_name, dest_name));
+  EXPECT_EQ(false, check_renameat_success(dir_fd, src_name, dir_fd, dest_name));
+  EXPECT_EQ(OB_SUCCESS, rename_with_retry(src_name, dest_name));
+  system(touch_src_cmd);
+  EXPECT_EQ(OB_SUCCESS, rename_with_retry(src_name, dest_name));
+}
+
+} // end namespace unittest
+} // end namespace oceanbase
+
+int main(int argc, char **argv)
+{
+  OB_LOGGER.set_file_name("test_log_io_utils.log", true);
+  OB_LOGGER.set_log_level("TRACE");
+  PALF_LOG(INFO, "begin unittest::test_log_io_utils");
+  ::testing::InitGoogleTest(&argc, argv);
+  return RUN_ALL_TESTS();
+}