[TD_543] fix coverity scan, cid:267787

src/client/src/tscSub.c

@@ -301,7 +301,9 @@ void tscSaveSubscriptionProgress(void* sub) {
   char path[256];
   sprintf(path, "%s/subscribe", tsDataDir);
   if (access(path, 0) != 0) {
-    mkdir(path, 0777);
+    if (mkdir(path, 0777) != 0 && errno != EEXIST) {
+      tscError("failed to create subscribe dir: %s", path);
+    }
   }
 
   sprintf(path, "%s/subscribe/%s", tsDataDir, pSub->topic);

src/client/src/tscSystem.c

@@ -81,7 +81,6 @@ int32_t tscInitRpc(const char *user, const char *secret, void** pDnodeConn) {
 
 void taos_init_imp() {
   char temp[128];
-  struct stat dirstat;
   
   errno = TSDB_CODE_SUCCESS;
   srand(taosGetTimestampSec());
@@ -94,7 +93,9 @@ void taos_init_imp() {
     taosReadGlobalLogCfg();
 
     // For log directory
-    if (stat(tsLogDir, &dirstat) < 0) mkdir(tsLogDir, 0755);
+    if (mkdir(tsLogDir, 0755) != 0 && errno != EEXIST) {
+      printf("failed to create log dir:%s\n", tsLogDir);
+    }
 
     sprintf(temp, "%s/taoslog", tsLogDir);
     if (taosInitLog(temp, tsNumOfLogLines, 10) < 0) {