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[Windows] Disable console I/O redirection, if it's already redirected to the pipe or file.

This commit is contained in:
bruvzg 2022-01-28 08:30:01 +02:00
parent e6caaf4c80
commit 99a1e552ac
1 changed files with 15 additions and 7 deletions
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22
platform/windows/os_windows.cpp
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@ -83,15 +83,23 @@ static String format_error_message(DWORD id) {
return msg;
}
void RedirectStream(const char *p_file_name, const char *p_mode, FILE *p_cpp_stream, const DWORD p_std_handle) {
const HANDLE h_existing = GetStdHandle(p_std_handle);
if (h_existing != INVALID_HANDLE_VALUE) { // Redirect only if attached console have a valid handle.
const HANDLE h_cpp = reinterpret_cast<HANDLE>(_get_osfhandle(_fileno(p_cpp_stream)));
if (h_cpp == INVALID_HANDLE_VALUE) { // Redirect only if it's not already redirected to the pipe or file.
FILE *fp = p_cpp_stream;
freopen_s(&fp, p_file_name, p_mode, p_cpp_stream); // Redirect stream.
setvbuf(p_cpp_stream, nullptr, _IONBF, 0); // Disable stream buffering.
}
}
}
void RedirectIOToConsole() {
if (AttachConsole(ATTACH_PARENT_PROCESS)) {
FILE *fpstdin = stdin;
FILE *fpstdout = stdout;
FILE *fpstderr = stderr;
freopen_s(&fpstdin, "CONIN$", "r", stdin);
freopen_s(&fpstdout, "CONOUT$", "w", stdout);
freopen_s(&fpstderr, "CONOUT$", "w", stderr);
RedirectStream("CONIN$", "r", stdin, STD_INPUT_HANDLE);
RedirectStream("CONOUT$", "w", stdout, STD_OUTPUT_HANDLE);
RedirectStream("CONOUT$", "w", stderr, STD_ERROR_HANDLE);
printf("\n"); // Make sure our output is starting from the new line.
}