From 1c90e272c302a8fd9f079f3d690f6f0e8b896630 Mon Sep 17 00:00:00 2001
From: slzhou <shenglian_zhou@163.com>
Date: Tue, 1 Nov 2022 15:00:13 +0800
Subject: [PATCH] fix: uv_get_osenv set length only when no buf

---
 source/libs/function/src/tudf.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/source/libs/function/src/tudf.c b/source/libs/function/src/tudf.c
index d86bf15d10..85b14d6017 100644
--- a/source/libs/function/src/tudf.c
+++ b/source/libs/function/src/tudf.c
@@ -124,7 +124,10 @@ static int32_t udfSpawnUdfd(SUdfdData *pData) {
 
   char pathTaosdLdLib[512] = {0};
   size_t taosdLdLibPathLen = sizeof(pathTaosdLdLib);
-  uv_os_getenv("LD_LIBRARY_PATH", pathTaosdLdLib, &taosdLdLibPathLen);
+  int ret = uv_os_getenv("LD_LIBRARY_PATH", pathTaosdLdLib, &taosdLdLibPathLen);
+  if (ret != UV_ENOBUFS) {
+    taosdLdLibPathLen = strlen(pathTaosdLdLib);
+  }
 
   char udfdPathLdLib[1024] = {0};
   size_t udfdLdLibPathLen = strlen(tsUdfdLdLibPath);