From 4f54eab672fc97c40132577fef70f0aa8f0960f3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E6=9D=8E=E9=80=9A=E6=B4=B2?= <zhangsongcui3371@sina.com>
Date: Sun, 30 Jul 2023 00:36:47 +0800
Subject: [PATCH] LM (Linux): fix gdm version detection on Ubuntu

---
 src/detection/lm/lm_linux.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/src/detection/lm/lm_linux.c b/src/detection/lm/lm_linux.c
index 6b96db254..6416c80a7 100644
--- a/src/detection/lm/lm_linux.c
+++ b/src/detection/lm/lm_linux.c
@@ -16,8 +16,15 @@ static const char* getGdmVersion(FFstrbuf* version)
         "--version",
         NULL
     });
-    if (error)
-        return error;
+    if (error || version->length == 0)
+    {
+        error = ffProcessAppendStdOut(version, (char* const[]) {
+            "gdm3",
+            "--version",
+            NULL
+        });
+        if (error || version->length == 0) return "Failed to get GDM version";
+    }
 
     // GDM 44.1
     ffStrbufSubstrAfterFirstC(version, ' ');