Proper detection of lliurex distribution

Author: juanma1980

src/detection/os/os_linux.c

@@ -88,6 +88,20 @@ FF_MAYBE_UNUSED static void getUbuntuFlavour(FFOSResult* result)
         ffStrbufSetStatic(&result->id, "vanilla");
         ffStrbufSetStatic(&result->idLike, "ubuntu");
     }
+    if (ffPathExists("/etc/lliurex-cdd-version", FF_PATHTYPE_FILE))
+	{
+        ffStrbufSetStatic(&result->name, "LliureX");
+        ffStrbufSetStatic(&result->id, "lliurex");
+        ffStrbufClear(&result->version);
+        if (ffProcessAppendStdOut(&result->version, (char* const[]) {
+            "/usr/bin/lliurex-version",
+            NULL,
+        }) == NULL) // 8.2.2
+            ffStrbufTrimRightSpace(&result->versionID);
+        ffStrbufSetF(&result->prettyName, "LliureX %s", result->version.chars);
+        ffStrbufSetStatic(&result->idLike, "ubuntu");
+        return;
+	}
 
     if(ffStrContains(xdgConfigDirs, "kde") || ffStrContains(xdgConfigDirs, "plasma") || ffStrContains(xdgConfigDirs, "kubuntu"))
     {
@@ -169,15 +183,6 @@ FF_MAYBE_UNUSED static void getUbuntuFlavour(FFOSResult* result)
         ffStrbufSetStatic(&result->idLike, "ubuntu");
         return;
     }
-
-    if(ffStrContains(xdgConfigDirs, "lliurex"))
-    {
-        ffStrbufSetStatic(&result->name, "LliureX");
-        ffStrbufSetF(&result->prettyName, "LliureX %s", result->version.chars);
-        ffStrbufSetStatic(&result->id, "lliurex");
-        ffStrbufSetStatic(&result->idLike, "ubuntu");
-        return;
-    }
 }
 
 FF_MAYBE_UNUSED static void getDebianVersion(FFOSResult* result)