diff --git a/source/os/src/osSemaphore.c b/source/os/src/osSemaphore.c
index 63c414386b..5da78f002f 100644
--- a/source/os/src/osSemaphore.c
+++ b/source/os/src/osSemaphore.c
@@ -57,7 +57,7 @@ int32_t taosGetAppName(char* name, int32_t* len) {
     end = filepath;
   }
 
-  strcpy(name, end);
+  tstrncpy(name, end, TSDB_APP_NAME_LEN);
 
   if (len != NULL) {
     *len = (int32_t)strlen(end);
@@ -625,7 +625,7 @@ int32_t taosGetAppName(char *name, int32_t *len) {
   buf[PATH_MAX] = '\0';
   size_t n = strlen(buf);
   if (len) *len = n;
-  if (name) strcpy(name, buf);
+  if (name) tstrncpy(name, buf, TSDB_APP_NAME_LEN);
   return 0;
 }
 
@@ -668,7 +668,7 @@ int32_t taosGetAppName(char* name, int32_t* len) {
 
   ++end;
 
-  strcpy(name, end);
+  tstrncpy(name, end, TSDB_APP_NAME_LEN);
 
   if (len != NULL) {
     *len = strlen(name);