sys: Prevent libraries from printing garbage to the console through stderr

main/source/window/linux_window.cpp

@@ -10,6 +10,7 @@
     #include <hex/helpers/logger.hpp>
 
     #include <nlohmann/json.hpp>
+    #include <cstdio>
     #include <sys/wait.h>
     #include <unistd.h>
 
@@ -24,6 +25,11 @@ namespace hex {
                 setenv("LD_LIBRARY_PATH", hex::format("{};{}", hex::getEnvironmentVariable("LD_LIBRARY_PATH").value_or(""), path.string().c_str()).c_str(), true);
         }
 
+        // Various libraries sadly directly print to stderr with no way to disable it
+        // We redirect stderr to /dev/null to prevent this
+        freopen("/dev/null", "w", stderr);
+        setvbuf(stderr, nullptr, _IONBF, 0);
+
         // Redirect stdout to log file if we're not running in a terminal
         if (!isatty(STDOUT_FILENO)) {
             log::redirectToFile();

main/source/window/macos_window.cpp

@@ -10,6 +10,7 @@
     #include <hex/helpers/logger.hpp>
 
     #include <nlohmann/json.hpp>
+    #include <cstdio>
     #include <unistd.h>
 
     #include <imgui_impl_glfw.h>
@@ -23,6 +24,11 @@ namespace hex {
                 setenv("LD_LIBRARY_PATH", hex::format("{};{}", hex::getEnvironmentVariable("LD_LIBRARY_PATH").value_or(""), path.string().c_str()).c_str(), true);
         }
 
+        // Various libraries sadly directly print to stderr with no way to disable it
+        // We redirect stderr to /dev/null to prevent this
+        freopen("/dev/null", "w", stderr);
+        setvbuf(stderr, nullptr, _IONBF, 0);
+
         // Redirect stdout to log file if we're not running in a terminal
         if (!isatty(STDOUT_FILENO)) {
             log::redirectToFile();

main/source/window/win_window.cpp

@@ -24,6 +24,7 @@
     #include <wrl/client.h>
 
     #include <csignal>
+    #include <cstdio>
 
     #include <imgui_impl_glfw.h>
 
@@ -203,15 +204,18 @@ namespace hex {
                 AddDllDirectory(path.c_str());
         }
 
+        // Various libraries sadly directly print to stderr with no way to disable it
+        // We redirect stderr to NUL to prevent this
+        freopen("NUL:", "w", stderr);
+        setvbuf(stderr, nullptr, _IONBF, 0);
+
         // Attach to parent console if one exists
         if (AttachConsole(ATTACH_PARENT_PROCESS)) {
-            // Redirect cin, cout and cerr to that console
+            // Redirect stdin and stdout to that new console
             freopen("CONIN$", "r", stdin);
             freopen("CONOUT$", "w", stdout);
-            freopen("CONOUT$", "w", stderr);
             setvbuf(stdin, nullptr, _IONBF, 0);
             setvbuf(stdout, nullptr, _IONBF, 0);
-            setvbuf(stderr, nullptr, _IONBF, 0);
 
             fmt::print("\n");