From 109bc3979b989969fdfba947286c771623d6b69a Mon Sep 17 00:00:00 2001
From: David Ludwig <dludwig@pobox.com>
Date: Tue, 15 Aug 2017 21:41:59 -0400
Subject: [PATCH] implemented issue #7: output stdout and stderr to a log file;
 removed output redirection to win32 console, which was buggy

---
 BasiliskII/src/Windows/main_windows.cpp | 25 +++++++++++++++++++------
 1 file changed, 19 insertions(+), 6 deletions(-)

diff --git a/BasiliskII/src/Windows/main_windows.cpp b/BasiliskII/src/Windows/main_windows.cpp
index 9fa4e1c0..f54e595a 100755
--- a/BasiliskII/src/Windows/main_windows.cpp
+++ b/BasiliskII/src/Windows/main_windows.cpp
@@ -212,12 +212,25 @@ int main(int argc, char **argv)
 	char str[256];
 	bool cd_boot = false;
 
-	// Make sure stdout and stderr gets displayed, if and when the app is run
-	// via a command prompt window.
-	if (AttachConsole(ATTACH_PARENT_PROCESS)) {
-		freopen("CONOUT$", "w", stdout);
-		freopen("CONOUT$", "w", stderr);
-	}
+	// Redirect stdout and stderr to a log file, for diagnostic purposes.
+	// Unbuffered file IO will be used (setup via setvbuf() calls), so as
+	// to write log file data ASAP, lest it get lost in case of program
+	// termination.
+	wchar_t logFileName[4096];
+	logFileName[0] = L'\0';
+	_wgetcwd(logFileName, SDL_arraysize(logFileName));
+	if (logFileName[0] != L'\0') {
+		SDL_wcslcat(logFileName, L"\\BasiliskII_log.txt", SDL_arraysize(logFileName));
+		FILE * fp;
+		fp = _wfreopen(logFileName, L"w", stdout);
+		if (fp) {
+			setvbuf(stdout, NULL, _IONBF, 0);
+		}
+		fp = _wfreopen(logFileName, L"w", stderr);
+		if (fp) {
+			setvbuf(stderr, NULL, _IONBF, 0);
+		}
+	}
 
 	// Initialize variables
 	RAMBaseHost = NULL;