From d03ab3ef276e4ee8fe4705100c3d1516eea338fc Mon Sep 17 00:00:00 2001
From: Alexander Wagner <a.wagner.extern@senec.com>
Date: Wed, 29 Nov 2023 20:28:45 +0100
Subject: [PATCH] - fixed Exist function on Linux

---
 code/Common/DefaultIOSystem.cpp | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/code/Common/DefaultIOSystem.cpp b/code/Common/DefaultIOSystem.cpp
index b28910c70..1bda76e50 100644
--- a/code/Common/DefaultIOSystem.cpp
+++ b/code/Common/DefaultIOSystem.cpp
@@ -99,12 +99,12 @@ bool DefaultIOSystem::Exists(const char *pFile) const {
         return false;
     }
 #else
-    FILE *file = ::fopen(pFile, "rb");
-    if (!file) {
+	struct stat statbuf;
+    stat(pFile, &statbuf);
+    // test for a regular file
+    if (!S_ISREG(statbuf.st_mode)){
         return false;
     }
-
-    ::fclose(file);
 #endif
 
     return true;
@@ -116,6 +116,7 @@ IOStream *DefaultIOSystem::Open(const char *strFile, const char *strMode) {
     ai_assert(strFile != nullptr);
     ai_assert(strMode != nullptr);
     FILE *file;
+	
 #ifdef _WIN32
     std::wstring name = Utf8ToWide(strFile);
     if (name.empty()) {
@@ -126,6 +127,7 @@ IOStream *DefaultIOSystem::Open(const char *strFile, const char *strMode) {
 #else
     file = ::fopen(strFile, strMode);
 #endif
+	
     if (!file) {
         return nullptr;
     }