diff --git a/source/client/src/clientMonitor.c b/source/client/src/clientMonitor.c
index 9ed6512352..6a0a09f9bd 100644
--- a/source/client/src/clientMonitor.c
+++ b/source/client/src/clientMonitor.c
@@ -821,9 +821,10 @@ int32_t monitorInit() {
     return code;
   }
 
-  if (taosMulModeMkDir(tmpSlowLogPath, 0777, true) != 0) {
+  code = taosMulModeMkDir(tmpSlowLogPath, 0777, true);
+  if (code != 0) {
     tscError("failed to create dir:%s since %s", tmpSlowLogPath, terrstr());
-    return TAOS_GET_TERRNO(TSDB_CODE_OUT_OF_MEMORY);
+    return code;
   }
 
   if (tsem2_init(&monitorSem, 0, 0) != 0) {
diff --git a/source/common/src/cos.c b/source/common/src/cos.c
index f02130d468..064e06eb43 100644
--- a/source/common/src/cos.c
+++ b/source/common/src/cos.c
@@ -1881,7 +1881,6 @@ void s3EvictCache(const char *path, long object_size) {
     // 1, list data files' atime under dir(path)
     tdbDirPtr pDir = taosOpenDir(dir_name);
     if (pDir == NULL) {
-      terrno = TAOS_SYSTEM_ERROR(errno);
       vError("failed to open %s since %s", dir_name, terrstr());
     }
     SArray        *evict_files = taosArrayInit(16, sizeof(SEvictFile));
diff --git a/source/libs/index/src/indexTfile.c b/source/libs/index/src/indexTfile.c
index 55a9bb06d9..8e1c4a2d2f 100644
--- a/source/libs/index/src/indexTfile.c
+++ b/source/libs/index/src/indexTfile.c
@@ -1125,7 +1125,7 @@ static int32_t tfileGetFileList(const char* path, SArray** ppResult) {
 
   TdDirPtr pDir = taosOpenDir(path);
   if (NULL == pDir) {
-    TAOS_CHECK_GOTO(TAOS_SYSTEM_ERROR(errno), NULL, _exception);
+    TAOS_CHECK_GOTO(terrno, NULL, _exception);
   }
   TdDirEntryPtr pDirEntry;
   while ((pDirEntry = taosReadDir(pDir)) != NULL) {
diff --git a/source/libs/stream/src/streamBackendRocksdb.c b/source/libs/stream/src/streamBackendRocksdb.c
index 4793a8951a..465968dc50 100644
--- a/source/libs/stream/src/streamBackendRocksdb.c
+++ b/source/libs/stream/src/streamBackendRocksdb.c
@@ -599,7 +599,7 @@ int32_t backendFileCopyFilesImpl(const char* src, const char* dst) {
   // copy file to dst
   TdDirPtr pDir = taosOpenDir(src);
   if (pDir == NULL) {
-    code = TAOS_SYSTEM_ERROR(errno);
+    code = terrno;
     goto _ERROR;
   }
 
@@ -1428,7 +1428,7 @@ int32_t chkpPreBuildDir(char* path, int64_t chkpId, char** chkpDir, char** chkpI
 
   code = taosMulModeMkDir(pChkpDir, 0755, true);
   if (code != 0) {
-    code = TAOS_SYSTEM_ERROR(errno);
+    code = terrno;
     stError("failed to prepare checkpoint dir, path:%s, reason:%s", path, tstrerror(code));
     goto _EXIT;
   }
@@ -4633,7 +4633,7 @@ int32_t dbChkpGetDelta(SDbChkp* p, int64_t chkpId, SArray* list) {
   TdDirPtr pDir = taosOpenDir(p->buf);
   if (pDir == NULL) {
     (void)taosThreadRwlockUnlock(&p->rwLock);
-    return TAOS_SYSTEM_ERROR(errno);
+    return terrno;
   }
 
   TdDirEntryPtr de = NULL;
diff --git a/source/libs/stream/src/streamCheckpoint.c b/source/libs/stream/src/streamCheckpoint.c
index 916aee4e6e..05dcab3aae 100644
--- a/source/libs/stream/src/streamCheckpoint.c
+++ b/source/libs/stream/src/streamCheckpoint.c
@@ -1224,7 +1224,7 @@ static int32_t uploadCheckpointToS3(const char* id, const char* path) {
 
   TdDirPtr pDir = taosOpenDir(path);
   if (pDir == NULL) {
-    return TAOS_SYSTEM_ERROR(errno);
+    return terrno;
   }
 
   TdDirEntryPtr de = NULL;
diff --git a/source/libs/stream/src/streamSnapshot.c b/source/libs/stream/src/streamSnapshot.c
index 0390422623..eb222efce6 100644
--- a/source/libs/stream/src/streamSnapshot.c
+++ b/source/libs/stream/src/streamSnapshot.c
@@ -271,7 +271,7 @@ int32_t snapFileReadMeta(SBackendSnapFile2* pSnapFile) {
   int32_t  code = 0;
   TdDirPtr pDir = taosOpenDir(pSnapFile->path);
   if (NULL == pDir) {
-    code = TAOS_SYSTEM_ERROR(errno);
+    code = terrno;
     stError("%s failed to open %s, reason:%s", STREAM_STATE_TRANSFER, pSnapFile->path, tstrerror(code));
     return code;
   }
diff --git a/source/libs/tdb/src/db/tdbPager.c b/source/libs/tdb/src/db/tdbPager.c
index b0f32136a3..4a5ad9d663 100644
--- a/source/libs/tdb/src/db/tdbPager.c
+++ b/source/libs/tdb/src/db/tdbPager.c
@@ -1136,7 +1136,7 @@ int tdbPagerRestoreJournals(SPager *pPager) {
   tdbDirPtr      pDir = taosOpenDir(pPager->pEnv->dbName);
   if (pDir == NULL) {
     tdbError("failed to open %s since %s", pPager->pEnv->dbName, strerror(errno));
-    return TAOS_SYSTEM_ERROR(errno);
+    return terrno;
   }
 
   SArray *pTxnList = taosArrayInit(16, sizeof(int64_t));
@@ -1182,7 +1182,7 @@ int tdbPagerRollback(SPager *pPager) {
   tdbDirPtr      pDir = taosOpenDir(pPager->pEnv->dbName);
   if (pDir == NULL) {
     tdbError("failed to open %s since %s", pPager->pEnv->dbName, strerror(errno));
-    return terrno = TAOS_SYSTEM_ERROR(errno);
+    return terrno;
   }
 
   while ((pDirEntry = tdbReadDir(pDir)) != NULL) {
diff --git a/source/libs/wal/src/walMeta.c b/source/libs/wal/src/walMeta.c
index 0eb011113a..fb30dd3376 100644
--- a/source/libs/wal/src/walMeta.c
+++ b/source/libs/wal/src/walMeta.c
@@ -403,7 +403,7 @@ int32_t walCheckAndRepairMeta(SWal* pWal) {
     regfree(&logRegPattern);
     regfree(&idxRegPattern);
     wError("vgId:%d, path:%s, failed to open since %s", pWal->cfg.vgId, pWal->path, strerror(errno));
-    TAOS_RETURN(TSDB_CODE_FAILED);
+    return terrno;
   }
 
   SArray* actualLog = taosArrayInit(8, sizeof(SWalFileInfo));
@@ -422,7 +422,7 @@ int32_t walCheckAndRepairMeta(SWal* pWal) {
         regfree(&idxRegPattern);
         (void)taosCloseDir(&pDir);
 
-        TAOS_RETURN(TSDB_CODE_OUT_OF_MEMORY);
+        return terrno;
       }
     }
   }
diff --git a/source/os/src/osDir.c b/source/os/src/osDir.c
index 9f3908183e..d233a4fe0e 100644
--- a/source/os/src/osDir.c
+++ b/source/os/src/osDir.c
@@ -145,7 +145,10 @@ int32_t taosMulMkDir(const char *dirname) {
   char   *pos = temp;
   int32_t code = 0;
 #ifdef WINDOWS
-  taosRealPath(dirname, temp, sizeof(temp));
+  code = taosRealPath(dirname, temp, sizeof(temp));
+  if(code != 0) {
+    return code;
+  }
   if (temp[1] == ':') pos += 3;
 #else
   (void)strcpy(temp, dirname);
@@ -207,7 +210,10 @@ int32_t taosMulModeMkDir(const char *dirname, int mode, bool checkAccess) {
   char   *pos = temp;
   int32_t code = 0;
 #ifdef WINDOWS
-  taosRealPath(dirname, temp, sizeof(temp));
+  code = taosRealPath(dirname, temp, sizeof(temp));
+  if(code != 0) {
+    return code;
+  }
   if (temp[1] == ':') pos += 3;
 #else
   (void)strcpy(temp, dirname);
@@ -430,6 +436,9 @@ TdDirPtr taosOpenDir(const char *dirname) {
   HANDLE hFind;
 
   TdDirPtr pDir = taosMemoryMalloc(sizeof(TdDir));
+  if(pDir == NULL) {
+    return NULL;
+  }
 
   strcpy(szFind, dirname);
   strcat(szFind, "\\*.*");  //利用通配符找这个目录下的所以文件，包括目录
@@ -437,6 +446,8 @@ TdDirPtr taosOpenDir(const char *dirname) {
   pDir->hFind = FindFirstFile(szFind, &(pDir->dirEntry.findFileData));
   if (INVALID_HANDLE_VALUE == pDir->hFind) {
     taosMemoryFree(pDir);
+    DWORD errorCode = GetLastError();
+    terrno = TAOS_SYSTEM_ERROR(errorCode);
     return NULL;
   }
   return pDir;
@@ -444,6 +455,11 @@ TdDirPtr taosOpenDir(const char *dirname) {
   DIR *pDir = opendir(dirname);
   if (pDir == NULL) return NULL;
   TdDirPtr dirPtr = (TdDirPtr)taosMemoryMalloc(sizeof(TdDir));
+  if (dirPtr == NULL) {
+    (void)closedir(pDir);
+    terrno = TAOS_SYSTEM_ERROR(errno);
+    return NULL;
+  }
   dirPtr->dirEntryPtr = (TdDirEntryPtr) & (dirPtr->dirEntry1);
   dirPtr->pDir = pDir;
   return dirPtr;
@@ -506,22 +522,30 @@ char *taosGetDirEntryName(TdDirEntryPtr pDirEntry) {
 }
 
 int32_t taosCloseDir(TdDirPtr *ppDir) {
+  int32_t code =  0;
   if (ppDir == NULL || *ppDir == NULL) {
     terrno = TSDB_CODE_INVALID_PARA;
     return terrno;
   }
 #ifdef WINDOWS
-  FindClose((*ppDir)->hFind);
+  if(!FindClose((*ppDir)->hFind)) {
+    terrno = TAOS_SYSTEM_ERROR(GetLastError());
+    return terrno;
+  }
   taosMemoryFree(*ppDir);
   *ppDir = NULL;
   return 0;
 #elif defined(DARWIN)
-  closedir((*ppDir)->pDir);
+  code = closedir((*ppDir)->pDir);
+  if (-1 == code) {
+    terrno = TAOS_SYSTEM_ERROR(errno);
+    return terrno;
+  }
   taosMemoryFree(*ppDir);
   *ppDir = NULL;
   return 0;
 #else
-  int32_t code = closedir((DIR *)*ppDir);
+  code = closedir((DIR *)*ppDir);
   *ppDir = NULL;
   if (-1 == code) {
     terrno = TAOS_SYSTEM_ERROR(errno);
diff --git a/source/util/src/tcompare.c b/source/util/src/tcompare.c
index afa048f0ac..b1f4ed0ed3 100644
--- a/source/util/src/tcompare.c
+++ b/source/util/src/tcompare.c
@@ -1227,8 +1227,8 @@ static void checkRegexCache(void* param, void* tmrId) {
   if(sRegexCache.exit) {
     goto _exit;
   }
-  bool ret = taosTmrReset(checkRegexCache, REGEX_CACHE_CLEAR_TIME * 1000, param, sRegexCache.regexCacheTmr, &tmrId);
-  if (!ret) {
+  bool stopped = taosTmrReset(checkRegexCache, REGEX_CACHE_CLEAR_TIME * 1000, param, sRegexCache.regexCacheTmr, &tmrId);
+  if (stopped) {
     uError("failed to reset regex cache timer");
     goto _exit;
   }