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fix win32 console logging to be better than ever and no longer slay msys windows (fixes #4673)

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This commit is contained in:
zeromus 2017-02-24 18:37:36 -06:00
parent a16ba84502
commit e89706d251
1 changed files with 35 additions and 8 deletions
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43
frontend/drivers/platform_win32.c
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@ -49,6 +49,8 @@ static dylib_t dwmlib;
static bool dwm_composition_disabled;
static bool console_needs_free;
static void gfx_dwm_shutdown(void)
{
if (dwmlib)
@ -345,11 +347,33 @@ static void frontend_win32_attach_console(void)
{
#ifdef _WIN32
#ifdef _WIN32_WINNT_WINXP
AttachConsole(ATTACH_PARENT_PROCESS);
AllocConsole();
AttachConsole( GetCurrentProcessId()) ;
freopen( "CON", "w", stdout );
freopen( "CON", "w", stderr );
/* msys will start the process with FILE_TYPE_PIPE connected.
* cmd will start the process with FILE_TYPE_UNKNOWN connected (since this is subsystem windows application
* ... UNLESS stdout/stderr were redirected (then FILE_TYPE_DISK will be connected most likely)
* explorer will start the process with NOTHING connected.
*
* Now, let's not reconnect anything that's already connected.
* If any are disconnected, open a console, and connect to them.
* In case we're launched from msys or cmd, try attaching to the parent process console first.
* Take care to leave a record of what we did, so we can undo it precisely
*/
bool need_stdout = (GetFileType(GetStdHandle(STD_OUTPUT_HANDLE)) == FILE_TYPE_UNKNOWN);
bool need_stderr = (GetFileType(GetStdHandle(STD_ERROR_HANDLE)) == FILE_TYPE_UNKNOWN);
if(need_stdout || need_stderr)
{
if(!AttachConsole( ATTACH_PARENT_PROCESS))
{
AllocConsole();
}
if(need_stdout) freopen( "CONOUT$", "w", stdout );
if(need_stderr) freopen( "CONOUT$", "w", stderr );
console_needs_free = true;
}
#endif
#endif
@ -359,12 +383,15 @@ static void frontend_win32_detach_console(void)
{
#if defined(_WIN32) && !defined(_XBOX)
#ifdef _WIN32_WINNT_WINXP
if (!AttachConsole(ATTACH_PARENT_PROCESS))
if(console_needs_free)
{
HWND wnd = GetConsoleWindow();
/* we don't reconnect stdout/stderr to anything here, because by definition, they weren't connected to anything in the first place. */
FreeConsole();
PostMessage(wnd, WM_CLOSE, 0, 0);
console_needs_free = false;
}
#endif
#endif
}