From 6c0c4fa2cf979b0516852685487b45c0947e50fa Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E6=9D=8E=E9=80=9A=E6=B4=B2?= <carter.li@eoitek.com>
Date: Sun, 21 Apr 2024 17:28:40 +0800
Subject: [PATCH] Host (Linux): improve performance of WSL version detection

---
 src/detection/host/host_linux.c | 20 ++++++--------------
 1 file changed, 6 insertions(+), 14 deletions(-)

diff --git a/src/detection/host/host_linux.c b/src/detection/host/host_linux.c
index 92b1c49f9..e6311f0fd 100644
--- a/src/detection/host/host_linux.c
+++ b/src/detection/host/host_linux.c
@@ -78,20 +78,12 @@ const char* ffDetectHost(FFHostResult* host)
                 ffStrbufAppendF(&host->name, " - %s", wslDistroName);
             ffStrbufAppendS(&host->family, "WSL");
 
-            FF_STRBUF_AUTO_DESTROY wslVer = ffStrbufCreate(); //Wide characters
-            if(!ffProcessAppendStdOut(&wslVer, (char* const[]){
-                "wsl.exe",
-                "--version",
-                NULL
-            }) && wslVer.length > 0)
-            {
-                ffStrbufSubstrBeforeFirstC(&wslVer, '\r'); //CRLF
-                ffStrbufSubstrAfterLastC(&wslVer, ' ');
-                for(uint32_t i = 0; i < wslVer.length; ++i) {
-                    if(wslVer.chars[i]) //don't append \0
-                        ffStrbufAppendC(&host->version, wslVer.chars[i]);
-                }
-            }
+            ffProcessAppendStdOut(&host->version, (char* const[]){
+                "wslinfo",
+                "--wsl-version",
+                "-n",
+                NULL,
+            }); // supported in 2.2.3 and later
         }
     }