Merge pull request #5070 from taosdata/feature/sim

[TD-2877]<fix>: fix the problem of data loss caused by system power failure

src/dnode/src/dnodeCfg.c

@@ -156,7 +156,7 @@ static int32_t dnodeWriteCfg() {
   len += snprintf(content + len, maxLen - len, "}\n");
 
   fwrite(content, 1, len, fp);
-  fflush(fp);
+  fsync(fileno(fp));
   fclose(fp);
   free(content);
   terrno = 0;

src/dnode/src/dnodeEps.c

@@ -277,7 +277,7 @@ static int32_t dnodeWriteEps() {
   len += snprintf(content + len, maxLen - len, "}\n");
 
   fwrite(content, 1, len, fp);
-  fflush(fp);
+  fsync(fileno(fp));
   fclose(fp);
   free(content);
   terrno = 0;

src/dnode/src/dnodeMInfos.c

@@ -286,7 +286,7 @@ static int32_t dnodeWriteMInfos() {
   len += snprintf(content + len, maxLen - len, "}\n");
 
   fwrite(content, 1, len, fp);
-  fflush(fp);
+  fsync(fileno(fp));
   fclose(fp);
   free(content);
   terrno = 0;

src/mnode/src/mnodeUser.c

@@ -123,7 +123,7 @@ static void mnodePrintUserAuth() {
     mnodeDecUserRef(pUser);
   }
 
-  fflush(fp);
+  fsync(fileno(fp));
   fclose(fp);
 }
 

src/vnode/src/vnodeCfg.c

@@ -341,7 +341,7 @@ int32_t vnodeWriteCfg(SCreateVnodeMsg *pMsg) {
   len += snprintf(content + len, maxLen - len, "}\n");
 
   fwrite(content, 1, len, fp);
-  fflush(fp);
+  fsync(fileno(fp));
   fclose(fp);
   free(content);
   terrno = 0;

src/vnode/src/vnodeVersion.c

@@ -90,7 +90,7 @@ int32_t vnodeSaveVersion(SVnodeObj *pVnode) {
   len += snprintf(content + len, maxLen - len, "}\n");
 
   fwrite(content, 1, len, fp);
-  fflush(fp);
+  fsync(fileno(fp));
   fclose(fp);
   free(content);
   terrno = 0;