config file: try to detect Wine executable's path

src/config.cpp

@@ -39,7 +39,7 @@ void parseConfigLine(std::string line){
 void parseConfigFile() {
     std::vector<std::string> paths;
     std::string home;
-    static const char *config_dir = "/.config/MangoHud";
+    static const char *config_dir = "/.config/MangoHud/";
 
     const char *env_home = std::getenv("HOME");
     if (env_home)
@@ -51,13 +51,34 @@ void parseConfigFile() {
 
     std::string exe_path = get_exe_path();
     auto n = exe_path.find_last_of('/');
-    if (!exe_path.empty() && n != std::string::npos) {
+    if (!exe_path.empty() && n != std::string::npos && n < exe_path.size() - 1) {
         // as executable's name
+        std::string basename = exe_path.substr(n + 1);
         if (!home.empty())
-            paths.push_back(home + config_dir + exe_path.substr(n) + ".conf");
+            paths.push_back(home + config_dir + basename + ".conf");
 
         // in executable's folder though not much sense in /usr/bin/
         paths.push_back(exe_path.substr(0, n) + "/MangoHud.conf");
+
+        // find executable's path when run in Wine
+        if (!home.empty() && (basename == "wine-preloader" || basename == "wine64-preloader")) {
+            std::string line;
+            std::ifstream stream("/proc/self/cmdline");
+            while (std::getline(stream, line, '\0'))
+            {
+                if (!line.empty()
+                    && (n = line.find_last_of('\\')) != std::string::npos
+                    && n < line.size() - 1) // have at least one character
+                {
+                    auto dot = line.find_last_of('.');
+                    if (dot < n)
+                        dot = line.size();
+                    paths.push_back(home + config_dir + "wine-" + line.substr(n + 1, dot - n - 1) + ".conf");
+                    break;
+                }
+            }
+
+        }
     }
 
     std::string line;