diff --git a/source/common/src/rsync.c b/source/common/src/rsync.c
index 15c296d730..8b453f7d82 100644
--- a/source/common/src/rsync.c
+++ b/source/common/src/rsync.c
@@ -131,7 +131,7 @@ void stopRsync() {
     int32_t ret = tsnprintf(buf, tListLen(buf), "kill -9 %d", pid);
     if (ret > 0) {
       uInfo("kill rsync program pid:%d", pid);
-      system(buf);
+      code = system(buf);
     }
   }
 #endif
diff --git a/source/os/src/osSemaphore.c b/source/os/src/osSemaphore.c
index 1b9e8d3273..e37182ce16 100644
--- a/source/os/src/osSemaphore.c
+++ b/source/os/src/osSemaphore.c
@@ -267,7 +267,7 @@ int32_t taosGetPIdByName(const char* name, int32_t* pPId) {
         continue;
       }
 
-      sscanf(buf, "%*s %s", bufx);
+      ret = sscanf(buf, "%*s %s", bufx);
       if (!strcmp(bufx, name)) {
         char* end = NULL;
         *pPId = taosStr2Int32(ptr->d_name, &end, 10);