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Merge pull request #1464 from Ryex/fix/windows-console-attach

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[Windows] Fix attaching logs to console
This commit is contained in:
seth 2023-08-06 15:37:44 -04:00 committed by GitHub
commit efaf4024ab
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GPG Key ID: 4AEE18F83AFDEB23
5 changed files with 179 additions and 51 deletions
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35
launcher/Application.cpp
View File

@ -135,13 +135,8 @@
#include "updater/MacSparkleUpdater.h"
#endif
#if defined Q_OS_WIN32
#ifndef WIN32_LEAN_AND_MEAN
#define WIN32_LEAN_AND_MEAN
#endif
#include <windows.h>
#include <stdio.h>
#include "WindowsConsole.h"
#endif
#define STRINGIFY(x) #x
@ -168,31 +163,15 @@ void appDebugOutput(QtMsgType type, const QMessageLogContext &context, const QSt
fflush(stderr);
}
}
} // namespace
Application::Application(int &argc, char **argv) : QApplication(argc, argv)
Application::Application(int& argc, char** argv) : QApplication(argc, argv)
{
#if defined Q_OS_WIN32
// attach the parent console
if(AttachConsole(ATTACH_PARENT_PROCESS))
{
// if attach succeeds, reopen and sync all the i/o
if(freopen("CON", "w", stdout))
{
std::cout.sync_with_stdio();
}
if(freopen("CON", "w", stderr))
{
std::cerr.sync_with_stdio();
}
if(freopen("CON", "r", stdin))
{
std::cin.sync_with_stdio();
}
auto out = GetStdHandle (STD_OUTPUT_HANDLE);
DWORD written;
const char * endline = "\n";
WriteConsole(out, endline, strlen(endline), &written, NULL);
// attach the parent console if stdout not already captured
if (AttachWindowsConsole()) {
consoleAttached = true;
}
#endif

11
launcher/CMakeLists.txt
View File

@ -575,6 +575,9 @@ set(ATLAUNCHER_SOURCES
)
set(LINKEXE_SOURCES
WindowsConsole.cpp
WindowsConsole.h
filelink/FileLink.h
filelink/FileLink.cpp
FileSystem.h
@ -1035,6 +1038,14 @@ SET(LAUNCHER_SOURCES
ui/instanceview/VisualGroup.h
)
if(WIN32)
set(LAUNCHER_SOURCES
WindowsConsole.cpp
WindowsConsole.h
${LAUNCHER_SOURCES}
)
endif()
qt_wrap_ui(LAUNCHER_UI
ui/MainWindow.ui
ui/setupwizard/PasteWizardPage.ui

132
launcher/WindowsConsole.cpp Normal file
View File

@ -0,0 +1,132 @@
/*
* Prism Launcher - Minecraft Launcher
* Copyright (C) 2022 Rachel Powers <508861+Ryex@users.noreply.github.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, version 3.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*
*/
#ifndef WIN32_LEAN_AND_MEAN
#define WIN32_LEAN_AND_MEAN
#endif
#include <fcntl.h>
#include <io.h>
#include <stdio.h>
#include <windows.h>
#include <iostream>
void RedirectHandle(DWORD handle, FILE* stream, const char* mode ) {
HANDLE stdHandle = GetStdHandle(handle);
if (stdHandle != INVALID_HANDLE_VALUE) {
int fileDescriptor = _open_osfhandle((intptr_t)stdHandle, _O_TEXT);
if (fileDescriptor != -1) {
FILE* file = _fdopen(fileDescriptor, mode);
if (file != NULL) {
int dup2Result = _dup2(_fileno(file), _fileno(stream));
if (dup2Result == 0) {
setvbuf(stream, NULL, _IONBF, 0);
}
}
}
}
}
// taken from https://stackoverflow.com/a/25927081
// getting a proper output to console with redirection support on windows is apparently hell
void BindCrtHandlesToStdHandles(bool bindStdIn, bool bindStdOut, bool bindStdErr)
{
// Re-initialize the C runtime "FILE" handles with clean handles bound to "nul". We do this because it has been
// observed that the file number of our standard handle file objects can be assigned internally to a value of -2
// when not bound to a valid target, which represents some kind of unknown internal invalid state. In this state our
// call to "_dup2" fails, as it specifically tests to ensure that the target file number isn't equal to this value
// before allowing the operation to continue. We can resolve this issue by first "re-opening" the target files to
// use the "nul" device, which will place them into a valid state, after which we can redirect them to our target
// using the "_dup2" function.
if (bindStdIn) {
FILE* dummyFile;
freopen_s(&dummyFile, "nul", "r", stdin);
}
if (bindStdOut) {
FILE* dummyFile;
freopen_s(&dummyFile, "nul", "w", stdout);
}
if (bindStdErr) {
FILE* dummyFile;
freopen_s(&dummyFile, "nul", "w", stderr);
}
// Redirect unbuffered stdin from the current standard input handle
if (bindStdIn) {
RedirectHandle(STD_INPUT_HANDLE, stdin, "r");
}
// Redirect unbuffered stdout to the current standard output handle
if (bindStdOut) {
RedirectHandle(STD_OUTPUT_HANDLE, stdout, "w");
}
// Redirect unbuffered stderr to the current standard error handle
if (bindStdErr) {
RedirectHandle(STD_ERROR_HANDLE, stderr, "w");
}
// Clear the error state for each of the C++ standard stream objects. We need to do this, as attempts to access the
// standard streams before they refer to a valid target will cause the iostream objects to enter an error state. In
// versions of Visual Studio after 2005, this seems to always occur during startup regardless of whether anything
// has been read from or written to the targets or not.
if (bindStdIn) {
std::wcin.clear();
std::cin.clear();
}
if (bindStdOut) {
std::wcout.clear();
std::cout.clear();
}
if (bindStdErr) {
std::wcerr.clear();
std::cerr.clear();
}
}
bool AttachWindowsConsole() {
auto stdinType = GetFileType(GetStdHandle(STD_INPUT_HANDLE));
auto stdoutType = GetFileType(GetStdHandle(STD_OUTPUT_HANDLE));
auto stderrType = GetFileType(GetStdHandle(STD_ERROR_HANDLE));
bool bindStdIn = false;
bool bindStdOut = false;
bool bindStdErr = false;
if (stdinType == FILE_TYPE_CHAR || stdinType == FILE_TYPE_UNKNOWN) {
bindStdIn = true;
}
if (stdoutType == FILE_TYPE_CHAR || stdoutType == FILE_TYPE_UNKNOWN) {
bindStdOut = true;
}
if (stderrType == FILE_TYPE_CHAR || stderrType == FILE_TYPE_UNKNOWN) {
bindStdErr = true;
}
if (AttachConsole(ATTACH_PARENT_PROCESS)) {
BindCrtHandlesToStdHandles(bindStdIn, bindStdOut, bindStdErr);
return true;
}
return false;
}

25
launcher/WindowsConsole.h Normal file
View File

@ -0,0 +1,25 @@
//
// SPDX-License-Identifier: GPL-3.0-only
/*
* Prism Launcher - Minecraft Launcher
* Copyright (C) 2022 Rachel Powers <508861+Ryex@users.noreply.github.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, version 3.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*
*/
#pragma once
void BindCrtHandlesToStdHandles(bool bindStdIn, bool bindStdOut, bool bindStdErr);
bool AttachWindowsConsole();

27
launcher/filelink/FileLink.cpp
View File

@ -37,11 +37,7 @@
#include <sys.h>
#if defined Q_OS_WIN32
#ifndef WIN32_LEAN_AND_MEAN
#define WIN32_LEAN_AND_MEAN
#endif
#include <stdio.h>
#include <windows.h>
#include "WindowsConsole.h"
#endif
// Snippet from https://github.com/gulrak/filesystem#using-it-as-single-file-header
@ -67,21 +63,7 @@ FileLinkApp::FileLinkApp(int& argc, char** argv) : QCoreApplication(argc, argv),
{
#if defined Q_OS_WIN32
// attach the parent console
if (AttachConsole(ATTACH_PARENT_PROCESS)) {
// if attach succeeds, reopen and sync all the i/o
if (freopen("CON", "w", stdout)) {
std::cout.sync_with_stdio();
}
if (freopen("CON", "w", stderr)) {
std::cerr.sync_with_stdio();
}
if (freopen("CON", "r", stdin)) {
std::cin.sync_with_stdio();
}
auto out = GetStdHandle(STD_OUTPUT_HANDLE);
DWORD written;
const char* endline = "\n";
WriteConsole(out, endline, strlen(endline), &written, NULL);
if (AttachWindowsConsole()) {
consoleAttached = true;
}
#endif
@ -188,7 +170,7 @@ void FileLinkApp::runLink()
FS::LinkResult result = { src_path, dst_path, QString::fromStdString(os_err.message()), os_err.value() };
m_path_results.append(result);
} else {
FS::LinkResult result = { src_path, dst_path };
FS::LinkResult result = { src_path, dst_path, "", 0};
m_path_results.append(result);
}
}
@ -248,7 +230,7 @@ void FileLinkApp::readPathPairs()
in >> numLinks;
qDebug() << "numLinks" << numLinks;
for (int i = 0; i < numLinks; i++) {
for (unsigned int i = 0; i < numLinks; i++) {
FS::LinkPair pair;
in >> pair.src;
in >> pair.dst;
@ -271,7 +253,6 @@ FileLinkApp::~FileLinkApp()
fclose(stdout);
fclose(stdin);
fclose(stderr);
FreeConsole();
}
#endif
}