From d33b5d60b6f5db72dbf4d23f8b642d60429844b3 Mon Sep 17 00:00:00 2001
From: apocelipes <seve3r@outlook.com>
Date: Tue, 18 Mar 2025 19:51:51 +0800
Subject: [PATCH] Display (Linux): fix the error check for ffReadFileData
 (#1622)

---
 src/detection/displayserver/linux/drm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/detection/displayserver/linux/drm.c b/src/detection/displayserver/linux/drm.c
index 1fe274b47..c62c544e5 100644
--- a/src/detection/displayserver/linux/drm.c
+++ b/src/detection/displayserver/linux/drm.c
@@ -30,7 +30,7 @@ static const char* drmParseSysfs(FFDisplayServerResult* result)
 
         char buf;
         ffStrbufAppendS(&drmDir, "/enabled");
-        if (!ffReadFileData(drmDir.chars, sizeof(buf), &buf) || buf != 'e') {
+        if (ffReadFileData(drmDir.chars, sizeof(buf), &buf) <= 0 || buf != 'e') {
           /* read failed or enabled != "enabled" */
           ffStrbufSubstrBefore(&drmDir, drmDirWithDnameLength);
           ffStrbufAppendS(&drmDir, "/status");