summaryrefslogtreecommitdiffstats
path: root/application/UpdateController.cpp
blob: 733e365f3488f150073d18e27b6ed856c7cf6be9 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
#include <QFile>
#include <QMessageBox>
#include <FileSystem.h>
#include <updater/GoUpdate.h>
#include "UpdateController.h"
#include <QApplication>
#include <thread>
#include <chrono>
#include <LocalPeer.h>

// from <sys/stat.h>
#ifndef S_IRUSR
#define __S_IREAD 0400         /* Read by owner.  */
#define __S_IWRITE 0200        /* Write by owner.  */
#define __S_IEXEC 0100         /* Execute by owner.  */
#define S_IRUSR __S_IREAD      /* Read by owner.  */
#define S_IWUSR __S_IWRITE     /* Write by owner.  */
#define S_IXUSR __S_IEXEC      /* Execute by owner.  */

#define S_IRGRP (S_IRUSR >> 3) /* Read by group.  */
#define S_IWGRP (S_IWUSR >> 3) /* Write by group.  */
#define S_IXGRP (S_IXUSR >> 3) /* Execute by group.  */

#define S_IROTH (S_IRGRP >> 3) /* Read by others.  */
#define S_IWOTH (S_IWGRP >> 3) /* Write by others.  */
#define S_IXOTH (S_IXGRP >> 3) /* Execute by others.  */
#endif
static QFile::Permissions unixModeToPermissions(const int mode)
{
	QFile::Permissions perms;

	if (mode & S_IRUSR)
	{
		perms |= QFile::ReadUser;
	}
	if (mode & S_IWUSR)
	{
		perms |= QFile::WriteUser;
	}
	if (mode & S_IXUSR)
	{
		perms |= QFile::ExeUser;
	}

	if (mode & S_IRGRP)
	{
		perms |= QFile::ReadGroup;
	}
	if (mode & S_IWGRP)
	{
		perms |= QFile::WriteGroup;
	}
	if (mode & S_IXGRP)
	{
		perms |= QFile::ExeGroup;
	}

	if (mode & S_IROTH)
	{
		perms |= QFile::ReadOther;
	}
	if (mode & S_IWOTH)
	{
		perms |= QFile::WriteOther;
	}
	if (mode & S_IXOTH)
	{
		perms |= QFile::ExeOther;
	}
	return perms;
}

static const QLatin1String liveCheckFile("live.check");

UpdateController::UpdateController(QWidget * parent, const QString& root, const QString updateFilesDir, GoUpdate::OperationList operations)
{
	m_parent = parent;
	m_root = root;
	m_updateFilesDir = updateFilesDir;
	m_operations = operations;
}


void UpdateController::installUpdates()
{
	qint64 pid = -1;
	QStringList args;
	bool started = false;

	qDebug() << "Installing updates.";
#ifdef Q_OS_WIN
	QString finishCmd = QApplication::applicationFilePath();
#elif defined Q_OS_LINUX
	QString finishCmd = FS::PathCombine(m_root, "MultiMC");
#elif defined Q_OS_MAC
	QString finishCmd = QApplication::applicationFilePath();
#else
#error Unsupported operating system.
#endif

	QString backupPath = FS::PathCombine(m_root, "update", "backup");
	QDir origin(m_root);

	// clean up the backup folder. it should be empty before we start
	if(!FS::deletePath(backupPath))
	{
		qWarning() << "couldn't remove previous backup folder" << backupPath;
	}
	// and it should exist.
	if(!FS::ensureFolderPathExists(backupPath))
	{
		qWarning() << "couldn't create folder" << backupPath;
		return;
	}

	bool useXPHack = false;
	QString exePath;
	QString exeOrigin;
	QString exeBackup;

	// perform the update operations
	for(auto op: m_operations)
	{
		switch(op.type)
		{
			// replace = move original out to backup, if it exists, move the new file in its place
			case GoUpdate::Operation::OP_REPLACE:
			{
#ifdef Q_OS_WIN32
				// hack for people renaming the .exe because ... reasons :)
				if(op.destination == "MultiMC.exe")
				{
					op.destination = QFileInfo(QApplication::applicationFilePath()).fileName();
				}
#endif
				QFileInfo destination (FS::PathCombine(m_root, op.destination));
#ifdef Q_OS_WIN32
				if(QSysInfo::windowsVersion() < QSysInfo::WV_VISTA)
				{
					if(destination.fileName() == "MultiMC.exe")
					{
						QDir rootDir(m_root);
						exeOrigin = rootDir.relativeFilePath(op.source);
						exePath = rootDir.relativeFilePath(op.destination);
						exeBackup = rootDir.relativeFilePath(FS::PathCombine(backupPath, destination.fileName()));
						useXPHack = true;
						continue;
					}
				}
#endif
				if(destination.exists())
				{
					QString backupName = op.destination;
					backupName.replace('/', '_');
					QString backupFilePath = FS::PathCombine(backupPath, backupName);
					if(!QFile::rename(destination.absoluteFilePath(), backupFilePath))
					{
						qWarning() << "Couldn't move:" << destination.absoluteFilePath() << "to" << backupFilePath;
						m_failedOperationType = Replace;
						m_failedFile = op.destination;
						fail();
						return;
					}
					BackupEntry be;
					be.original = destination.absoluteFilePath();
					be.backup = backupFilePath;
					be.update = op.source;
					m_replace_backups.append(be);
				}
				// make sure the folder we are putting this into exists
				if(!FS::ensureFilePathExists(destination.absoluteFilePath()))
				{
					qWarning() << "REPLACE: Couldn't create folder:" << destination.absoluteFilePath();
					m_failedOperationType = Replace;
					m_failedFile = op.destination;
					fail();
					return;
				}
				// now move the new file in
				if(!QFile::rename(op.source, destination.absoluteFilePath()))
				{
					qWarning() << "REPLACE: Couldn't move:" << op.source << "to" << destination.absoluteFilePath();
					m_failedOperationType = Replace;
					m_failedFile = op.destination;
					fail();
					return;
				}
				QFile::setPermissions(destination.absoluteFilePath(), unixModeToPermissions(op.destinationMode));
			}
			break;
			// delete = move original to backup
			case GoUpdate::Operation::OP_DELETE:
			{
				QString destFilePath = FS::PathCombine(m_root, op.destination);
				if(QFile::exists(destFilePath))
				{
					QString backupName = op.destination;
					backupName.replace('/', '_');
					QString trashFilePath = FS::PathCombine(backupPath, backupName);

					if(!QFile::rename(destFilePath, trashFilePath))
					{
						qWarning() << "DELETE: Couldn't move:" << op.destination << "to" << trashFilePath;
						m_failedFile = op.destination;
						m_failedOperationType = Delete;
						fail();
						return;
					}
					BackupEntry be;
					be.original = destFilePath;
					be.backup = trashFilePath;
					m_delete_backups.append(be);
				}
			}
			break;
		}
	}

	// try to start the new binary
	args = qApp->arguments();
	args.removeFirst();

	// on old Windows, do insane things... no error checking here, this is just to have something.
	if(useXPHack)
	{
		QString script;
		auto nativePath = QDir::toNativeSeparators(exePath);
		auto nativeOriginPath = QDir::toNativeSeparators(exeOrigin);
		auto nativeBackupPath = QDir::toNativeSeparators(exeBackup);

		// so we write this vbscript thing...
		QTextStream out(&script);
		out << "WScript.Sleep 1000\n";
		out << "Set fso=CreateObject(\"Scripting.FileSystemObject\")\n";
		out << "Set shell=CreateObject(\"WScript.Shell\")\n";
		out << "fso.MoveFile \"" << nativePath << "\", \"" << nativeBackupPath << "\"\n";
		out << "fso.MoveFile \"" << nativeOriginPath << "\", \"" << nativePath << "\"\n";
		out << "shell.Run \"" << nativePath << "\"\n";

		QString scriptPath = FS::PathCombine(m_root, "update", "update.vbs");

		// we save it
		QFile scriptFile(scriptPath);
		scriptFile.open(QIODevice::WriteOnly);
		scriptFile.write(script.toLocal8Bit().replace("\n", "\r\n"));
		scriptFile.close();

		// we run it
		started = QProcess::startDetached("wscript", {scriptPath}, m_root);

		// and we quit. conscious thought.
		qApp->quit();
		return;
	}
	bool doLiveCheck = true;
	bool startFailed = false;

	// remove live check file, if any
	if(QFile::exists(liveCheckFile))
	{
		if(!QFile::remove(liveCheckFile))
		{
			qWarning() << "Couldn't remove the" << liveCheckFile << "file! We will proceed without :(";
			doLiveCheck = false;
		}
	}

	if(doLiveCheck)
	{
		if(!args.contains("--alive"))
		{
			args.append("--alive");
		}
	}

	// FIXME: reparse args and construct a safe variant from scratch. This is a workaround for GH-1874:
	QStringList realargs;
	int skip = 0;
	for(auto & arg: args)
	{
		if(skip)
		{
			skip--;
			continue;
		}
		if(arg == "-l")
		{
			skip = 1;
			continue;
		}
		realargs.append(arg);
	}

	// start the updated application
	started = QProcess::startDetached(finishCmd, realargs, QDir::currentPath(), &pid);
	// much dumber check - just find out if the call
	if(!started || pid == -1)
	{
		qWarning() << "Couldn't start new process properly!";
		startFailed = true;
	}
	if(!startFailed && doLiveCheck)
	{
		int attempts = 0;
		while(attempts < 10)
		{
			attempts++;
			QString key;
			std::this_thread::sleep_for(std::chrono::milliseconds(250));
			if(!QFile::exists(liveCheckFile))
			{
				qWarning() << "Couldn't find the" << liveCheckFile << "file!";
				startFailed = true;
				continue;
			}
			try
			{
				key = QString::fromUtf8(FS::read(liveCheckFile));
				auto id = ApplicationId::fromRawString(key);
				LocalPeer peer(nullptr, id);
				if(peer.isClient())
				{
					startFailed = false;
					qDebug() << "Found process started with key " << key;
					break;
				}
				else
				{
					startFailed = true;
					qDebug() << "Process started with key " << key << "apparently died or is not reponding...";
					break;
				}
			}
			catch (const Exception &e)
			{
				qWarning() << "Couldn't read the" << liveCheckFile << "file!";
				startFailed = true;
				continue;
			}
		}
	}
	if(startFailed)
	{
		m_failedOperationType = Start;
		fail();
		return;
	}
	else
	{
		origin.rmdir(m_updateFilesDir);
		qApp->quit();
		return;
	}
}

void UpdateController::fail()
{
	qWarning() << "Update failed!";

	QString msg;
	bool doRollback = false;
	QString failTitle = QObject::tr("Update failed!");
	QString rollFailTitle = QObject::tr("Rollback failed!");
	switch (m_failedOperationType)
	{
		case Replace:
		{
			msg = QObject::tr("Couldn't replace file %1. Changes will be reverted.\n"
				"See the MultiMC log file for details.").arg(m_failedFile);
			doRollback = true;
			QMessageBox::critical(m_parent, failTitle, msg);
			break;
		}
		case Delete:
		{
			msg = QObject::tr("Couldn't remove file %1. Changes will be reverted.\n"
				"See the MultiMC log file for details.").arg(m_failedFile);
			doRollback = true;
			QMessageBox::critical(m_parent, failTitle, msg);
			break;
		}
		case Start:
		{
			msg = QObject::tr("The new version didn't start or is too old and doesn't respond to startup checks.\n"
				"\n"
				"Roll back to previous version?");
			auto result = QMessageBox::critical(
				m_parent,
				failTitle,
				msg,
				QMessageBox::Yes | QMessageBox::No,
				QMessageBox::Yes
			);
			doRollback = (result == QMessageBox::Yes);
			break;
		}
		case Nothing:
		default:
			return;
	}
	if(doRollback)
	{
		auto rollbackOK = rollback();
		if(!rollbackOK)
		{
			msg = QObject::tr("The rollback failed too.\n"
				"You will have to repair MultiMC manually.\n"
				"Please let us know why and how this happened.").arg(m_failedFile);
			QMessageBox::critical(m_parent, rollFailTitle, msg);
			qApp->quit();
		}
	}
	else
	{
		qApp->quit();
	}
}

bool UpdateController::rollback()
{
	bool revertOK = true;
	// if the above failed, roll back changes
	for(auto backup:m_replace_backups)
	{
		qWarning() << "restoring" << backup.original << "from" << backup.backup;
		if(!QFile::rename(backup.original, backup.update))
		{
			revertOK = false;
			qWarning() << "moving new" << backup.original << "back to" << backup.update << "failed!";
			continue;
		}

		if(!QFile::rename(backup.backup, backup.original))
		{
			revertOK = false;
			qWarning() << "restoring" << backup.original << "failed!";
		}
	}
	for(auto backup:m_delete_backups)
	{
		qWarning() << "restoring" << backup.original << "from" << backup.backup;
		if(!QFile::rename(backup.backup, backup.original))
		{
			revertOK = false;
			qWarning() << "restoring" << backup.original << "failed!";
		}
	}
	return revertOK;
}