From e042d5212ac74066b9a0d46b43aafa49fc50a89d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?David=20Hrdli=C4=8Dka?=
 <13226155+dhrdlicka@users.noreply.github.com>
Date: Sun, 24 Aug 2025 21:01:32 +0200
Subject: [PATCH] Implement logic for enabling portable mode

---
 src/86box.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/src/86box.c b/src/86box.c
index baf0a32ea..a0fe983c4 100644
--- a/src/86box.c
+++ b/src/86box.c
@@ -757,6 +757,22 @@ pc_init(int argc, char *argv[])
 
     path_slash(exe_path);
 
+    /*
+     * Determine if we are running in portable mode.
+     *
+     * We enable portable mode if the EXE path
+     * contains the global config file.
+     */
+    path_append_filename(global, exe_path, GLOBAL_CONFIG_FILE);
+
+    FILE *fp = fopen(global, "r");
+    if (fp) {
+        portable_mode = 1;
+        fclose(fp);
+    }
+
+    global = NULL;
+
     /*
      * Get the current working directory.
      *