strepsirrhini/libreoffice-online
3
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions 1
libreoffice-online/loolwsd/LOOLKit.cpp
Miklos Vajna 31867f669d Fix remaining uninitialized members 
The missing init of mutexes is probably theoretical, the TraceFile and
the Unit ones were real errors, I think.

Change-Id: If19c23a9c93d34059998346af8d45c26a34043a6
2016-09-28 10:20:48 +02:00

1679 lines
60 KiB
C++
Raw Blame History

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*/
/*
* The main entry point for the LibreOfficeKit process serving
* a document editing session.
*/
#include <dlfcn.h>
#include <ftw.h>
#include <climits>
#include <malloc.h>
#include <cstdlib>
#include <sys/capability.h>
#include <unistd.h>
#include <utime.h>
#include <atomic>
#include <cassert>
#include <condition_variable>
#include <cstdlib>
#include <iostream>
#include <memory>
#include <sstream>
#include <thread>
#include <thread>
#define LOK_USE_UNSTABLE_API
#include <LibreOfficeKit/LibreOfficeKitInit.h>
#include <Poco/Exception.h>
#include <Poco/JSON/Object.h>
#include <Poco/JSON/Parser.h>
#include <Poco/Net/HTTPClientSession.h>
#include <Poco/Net/HTTPRequest.h>
#include <Poco/Net/HTTPResponse.h>
#include <Poco/Net/NetException.h>
#include <Poco/Net/WebSocket.h>
#include <Poco/NotificationQueue.h>
#include <Poco/Process.h>
#include <Poco/Runnable.h>
#include <Poco/StringTokenizer.h>
#include <Poco/Thread.h>
#include <Poco/URI.h>
#include <Poco/Util/Application.h>
#include "ChildSession.hpp"
#include "Common.hpp"
#include "IoUtil.hpp"
#include "LOKitHelper.hpp"
#include "LOOLProtocol.hpp"
#include "LibreOfficeKit.hpp"
#include "Log.hpp"
#include "Png.hpp"
#include "Rectangle.hpp"
#include "TileDesc.hpp"
#include "Unit.hpp"
#include "UserMessages.hpp"
#include "Util.hpp"
#define LIB_SOFFICEAPP "lib" "sofficeapp" ".so"
#define LIB_MERGED "lib" "mergedlo" ".so"
typedef int (LokHookPreInit) (const char *install_path, const char *user_profile_path);
using Poco::Exception;
using Poco::File;
using Poco::JSON::Array;
using Poco::JSON::Object;
using Poco::JSON::Parser;
using Poco::Net::HTTPClientSession;
using Poco::Net::HTTPRequest;
using Poco::Net::HTTPResponse;
using Poco::Net::NetException;
using Poco::Net::WebSocket;
using Poco::Path;
using Poco::Process;
using Poco::Runnable;
using Poco::StringTokenizer;
using Poco::Thread;
using Poco::Timestamp;
using Poco::URI;
using Poco::Util::Application;
using namespace LOOLProtocol;
namespace
{
typedef enum { COPY_ALL, COPY_LO, COPY_NO_USR } LinkOrCopyType;
LinkOrCopyType linkOrCopyType;
std::string sourceForLinkOrCopy;
Path destinationForLinkOrCopy;
bool shouldCopyDir(const char *path)
{
switch (linkOrCopyType)
{
case COPY_NO_USR:
// bind mounted.
return strcmp(path,"usr") != 0;
case COPY_LO:
return
strcmp(path, "program/wizards") != 0 &&
strcmp(path, "sdk") != 0 &&
strcmp(path, "share/basic") != 0 &&
strcmp(path, "share/gallery") != 0 &&
strcmp(path, "share/Scripts") != 0 &&
strcmp(path, "share/template") != 0 &&
strcmp(path, "share/config/wizard") != 0 &&
strcmp(path, "share/config/wizard") != 0;
default: // COPY_ALL
return true;
}
}
int linkOrCopyFunction(const char *fpath,
const struct stat* /*sb*/,
int typeflag,
struct FTW* /*ftwbuf*/)
{
if (strcmp(fpath, sourceForLinkOrCopy.c_str()) == 0)
return 0;
assert(fpath[strlen(sourceForLinkOrCopy.c_str())] == '/');
const char *relativeOldPath = fpath + strlen(sourceForLinkOrCopy.c_str()) + 1;
Path newPath(destinationForLinkOrCopy, Path(relativeOldPath));
switch (typeflag)
{
case FTW_F:
case FTW_SLN:
File(newPath.parent()).createDirectories();
if (link(fpath, newPath.toString().c_str()) == -1)
{
Log::syserror("link(\"" + std::string(fpath) + "\",\"" + newPath.toString() +
"\") failed. Exiting.");
std::_Exit(Application::EXIT_SOFTWARE);
}
break;
case FTW_D:
{
struct stat st;
if (stat(fpath, &st) == -1)
{
Log::syserror("stat(\"" + std::string(fpath) + "\") failed.");
return 1;
}
if (!shouldCopyDir(relativeOldPath))
{
Log::trace("skip redundant paths " + std::string(relativeOldPath));
return FTW_SKIP_SUBTREE;
}
File(newPath).createDirectories();
struct utimbuf ut;
ut.actime = st.st_atime;
ut.modtime = st.st_mtime;
if (utime(newPath.toString().c_str(), &ut) == -1)
{
Log::syserror("utime(\"" + newPath.toString() + "\") failed.");
return 1;
}
}
break;
case FTW_DNR:
Log::error("Cannot read directory '" + std::string(fpath) + "'");
return 1;
case FTW_NS:
Log::error("nftw: stat failed for '" + std::string(fpath) + "'");
return 1;
default:
Log::error("nftw: unexpected type: '" + std::to_string(typeflag));
assert(false);
break;
}
return 0;
}
void linkOrCopy(const std::string& source,
const Path& destination,
LinkOrCopyType type)
{
linkOrCopyType = type;
sourceForLinkOrCopy = source;
if (sourceForLinkOrCopy.back() == '/')
sourceForLinkOrCopy.pop_back();
destinationForLinkOrCopy = destination;
if (nftw(source.c_str(), linkOrCopyFunction, 10, FTW_ACTIONRETVAL) == -1)
Log::error("linkOrCopy: nftw() failed for '" + source + "'");
}
void dropCapability(cap_value_t capability)
{
cap_t caps;
cap_value_t cap_list[] = { capability };
caps = cap_get_proc();
if (caps == nullptr)
{
Log::syserror("cap_get_proc() failed.");
std::_Exit(1);
}
char *capText = cap_to_text(caps, nullptr);
Log::trace("Capabilities first: " + std::string(capText));
cap_free(capText);
if (cap_set_flag(caps, CAP_EFFECTIVE, sizeof(cap_list)/sizeof(cap_list[0]), cap_list, CAP_CLEAR) == -1 ||
cap_set_flag(caps, CAP_PERMITTED, sizeof(cap_list)/sizeof(cap_list[0]), cap_list, CAP_CLEAR) == -1)
{
Log::syserror("cap_set_flag() failed.");
std::_Exit(1);
}
if (cap_set_proc(caps) == -1)
{
Log::syserror("cap_set_proc() failed.");
std::_Exit(1);
}
capText = cap_to_text(caps, nullptr);
Log::trace("Capabilities now: " + std::string(capText));
cap_free(capText);
cap_free(caps);
}
void symlinkPathToJail(const Path& jailPath, const std::string &loTemplate,
const std::string &loSubPath)
{
Path symlinkSource(jailPath, Path(loTemplate.substr(1)));
File(symlinkSource.parent()).createDirectories();
std::string symlinkTarget;
for (auto i = 0; i < Path(loTemplate).depth(); i++)
symlinkTarget += "../";
symlinkTarget += loSubPath;
Log::debug("symlink(\"" + symlinkTarget + "\",\"" + symlinkSource.toString() + "\")");
if (symlink(symlinkTarget.c_str(), symlinkSource.toString().c_str()) == -1)
{
Log::syserror("symlink(\"" + symlinkTarget + "\",\"" + symlinkSource.toString() + "\") failed");
throw Exception("symlink() failed");
}
}
}
/// Connection thread with a client (via WSD).
class Connection: public Runnable
{
public:
Connection(std::shared_ptr<ChildSession> session,
std::shared_ptr<WebSocket> ws) :
_sessionId(session->getId()),
_session(std::move(session)),
_ws(std::move(ws)),
_threadMutex(),
_joined(false)
{
Log::info("Connection ctor in child for " + _sessionId);
}
~Connection()
{
Log::info("~Connection dtor in child for " + _sessionId);
stop();
join();
}
const std::string& getSessionId() const { return _sessionId; };
std::shared_ptr<WebSocket> getWebSocket() const { return _ws; }
std::shared_ptr<ChildSession> getSession() { return _session; }
void start()
{
_thread.start(*this);
// Busy-wait until we run.
// This is important to make sure we can process
// callbacks, which if we're late to start will
// be dropped. No need for async notification here.
constexpr auto delay = COMMAND_TIMEOUT_MS / 20;
for (auto i = 0; i < 20 && !isRunning(); ++i)
{
std::this_thread::sleep_for(std::chrono::milliseconds(delay));
}
}
bool isRunning()
{
return _thread.isRunning();
}
void stop()
{
// What should we do here?
}
void join()
{
// The thread is joinable only once.
std::unique_lock<std::mutex> lock(_threadMutex);
if (!_joined)
{
_thread.join();
_joined = true;
}
}
void run() override
{
Util::setThreadName("kit_ws_" + _sessionId);
Log::debug("Thread started.");
try
{
IoUtil::SocketProcessor(_ws,
[this](const std::vector<char>& payload)
{
if (!_session->handleInput(payload.data(), payload.size()))
{
Log::info("Socket handler flagged for finishing.");
return false;
}
return true;
},
[this]() { _session->closeFrame(); },
[]() { return !!TerminationFlag; });
if (_session->isCloseFrame())
{
Log::trace("Normal close handshake.");
_ws->shutdown();
}
else
{
Log::trace("Abnormal close handshake.");
_ws->shutdown(WebSocket::WS_ENDPOINT_GOING_AWAY, SERVICE_UNAVALABLE_INTERNAL_ERROR);
}
}
catch (const Exception& exc)
{
Log::error() << "Connection::run: Exception: " << exc.displayText()
<< (exc.nested() ? " (" + exc.nested()->displayText() + ")" : "")
<< Log::end;
}
catch (const std::exception& exc)
{
Log::error(std::string("Connection::run: Exception: ") + exc.what());
}
Log::debug("Thread finished.");
}
private:
const std::string _sessionId;
Thread _thread;
std::shared_ptr<ChildSession> _session;
std::shared_ptr<WebSocket> _ws;
std::mutex _threadMutex;
std::atomic<bool> _joined;
};
/// A document container.
/// Owns LOKitDocument instance and connections.
/// Manages the lifetime of a document.
/// Technically, we can host multiple documents
/// per process. But for security reasons don't.
/// However, we could have a loolkit instance
/// per user or group of users (a trusted circle).
class Document : public Runnable, public IDocumentManager
{
public:
/// We have two types of password protected documents
/// 1) Documents which require password to view
/// 2) Document which require password to modify
enum class PasswordType { ToView, ToModify };
/// Descriptor class used to link a LOK
/// callback to a specific view.
struct CallbackDescriptor
{
Document* const Doc;
const int ViewId;
};
public:
Document(const std::shared_ptr<lok::Office>& loKit,
const std::string& jailId,
const std::string& docKey,
const std::string& url,
std::shared_ptr<TileQueue> tileQueue,
const std::shared_ptr<WebSocket>& ws)
: _loKit(loKit),
_jailId(jailId),
_docKey(docKey),
_url(url),
_tileQueue(std::move(tileQueue)),
_ws(ws),
_docPassword(""),
_haveDocPassword(false),
_isDocPasswordProtected(false),
_docPasswordType(PasswordType::ToView),
_stop(false),
_mutex(),
_isLoading(0),
_clientViews(0)
{
Log::info("Document ctor for url [" + _url + "] on child [" + _jailId + "].");
assert(_loKit && _loKit->get());
_callbackThread.start(*this);
}
~Document()
{
Log::info("~Document dtor for url [" + _url + "] on child [" + _jailId +
"]. There are " + std::to_string(_clientViews) + " views.");
// Wait for the callback worker to finish.
_stop = true;
_tileQueue->put("eof");
_callbackThread.join();
// Flag all connections to stop.
for (auto aIterator : _connections)
{
aIterator.second->stop();
}
// Destroy all connections and views.
for (auto aIterator : _connections)
{
try
{
// stop all websockets
if (aIterator.second->isRunning())
{
std::shared_ptr<WebSocket> ws = aIterator.second->getWebSocket();
if (ws)
{
ws->shutdownReceive();
aIterator.second->join();
}
}
}
catch(NetException& exc)
{
Log::error() << "Document::~Document: " << exc.displayText()
<< (exc.nested() ? " (" + exc.nested()->displayText() + ")" : "")
<< Log::end;
}
}
// Destroy all connections and views.
_connections.clear();
}
const std::string& getUrl() const { return _url; }
bool createSession(const std::string& sessionId, const unsigned intSessionId)
{
std::unique_lock<std::mutex> lock(_mutex);
try
{
const auto& it = _connections.find(intSessionId);
if (it != _connections.end())
{
// found item, check if still running
if (it->second->isRunning())
{
Log::warn("Session [" + sessionId + "] is already running.");
return true;
}
// Restore thread. TODO: Review this logic.
Log::warn("Session [" + sessionId + "] is not running. Restoring.");
_connections.erase(intSessionId);
}
Log::info() << "Creating " << (_clientViews ? "new" : "first")
<< " view for url: " << _url << " for sessionId: " << sessionId
<< " on jailId: " << _jailId << Log::end;
// Open websocket connection between the child process and the
// parent. The parent forwards us requests that it can't handle (i.e most).
HTTPClientSession cs("127.0.0.1", MasterPortNumber);
cs.setTimeout(0);
const auto childUrl = std::string(CHILD_URI) + "sessionId=" + sessionId + "&jailId=" + _jailId + "&docKey=" + _docKey;
HTTPRequest request(HTTPRequest::HTTP_GET, childUrl);
HTTPResponse response;
auto ws = std::make_shared<WebSocket>(cs, request, response);
ws->setReceiveTimeout(0);
auto session = std::make_shared<ChildSession>(sessionId, ws, _jailId, *this);
auto thread = std::make_shared<Connection>(session, ws);
const auto aInserted = _connections.emplace(intSessionId, thread);
if (aInserted.second)
{
thread->start();
}
else
{
Log::error("Connection already exists for child: " + _jailId + ", session: " + sessionId);
}
Log::debug("Connections: " + std::to_string(_connections.size()));
return true;
}
catch (const std::exception& ex)
{
Log::error("Exception while creating session [" + sessionId + "] on url [" + _url + "] - '" + ex.what() + "'.");
return false;
}
}
/// Purges dead connections and returns
/// the remaining number of clients.
/// Returns -1 on failure.
size_t purgeSessions()
{
std::vector<std::shared_ptr<ChildSession>> deadSessions;
size_t numRunning = 0;
size_t num_connections = 0;
{
std::unique_lock<std::mutex> lock(_mutex, std::defer_lock);
if (!lock.try_lock())
{
// Not a good time, try later.
return -1;
}
// If there are no live sessions, we don't need to do anything at all and can just
// bluntly exit, no need to clean up our own data structures. Also, there is a bug that
// causes the deadSessions.clear() call below to crash in some situations when the last
// session is being removed.
for (auto it = _connections.cbegin(); it != _connections.cend(); ++it)
{
if (it->second->isRunning())
numRunning++;
}
if (numRunning > 0)
{
for (auto it = _connections.cbegin(); it != _connections.cend(); )
{
if (!it->second->isRunning())
{
deadSessions.push_back(it->second->getSession());
it = _connections.erase(it);
}
else
{
++it;
}
}
}
num_connections = _connections.size();
}
if (numRunning == 0)
{
Log::info("No more sessions, exiting bluntly");
std::_Exit(Application::EXIT_OK);
}
// Don't destroy sessions while holding our lock.
// We may deadlock if a session is waiting on us
// during callback initiated while handling a command
// and the dtor tries to take its lock (which is taken).
deadSessions.clear();
return num_connections;
}
/// Returns true if at least one *live* connection exists.
/// Does not consider user activity, just socket status.
bool hasConnections()
{
// -ve values for failure.
return purgeSessions() != 0;
}
/// Returns true if there is no activity and
/// the document is saved.
bool canDiscard()
{
//TODO: Implement proper time-out on inactivity.
return !hasConnections();
}
/// Set Document password for given URL
void setDocumentPassword(int nPasswordType)
{
Log::info() << "setDocumentPassword: passwordProtected=" << _isDocPasswordProtected
<< " passwordProvided=" << _haveDocPassword
<< " password='" << _docPassword << "'" << Log::end;
if (_isDocPasswordProtected && _haveDocPassword)
{
// it means this is the second attempt with the wrong password; abort the load operation
_loKit->setDocumentPassword(_jailedUrl.c_str(), nullptr);
return;
}
// One thing for sure, this is a password protected document
_isDocPasswordProtected = true;
if (nPasswordType == LOK_CALLBACK_DOCUMENT_PASSWORD)
_docPasswordType = PasswordType::ToView;
else if (nPasswordType == LOK_CALLBACK_DOCUMENT_PASSWORD_TO_MODIFY)
_docPasswordType = PasswordType::ToModify;
Log::info("Calling _loKit->setDocumentPassword");
if (_haveDocPassword)
_loKit->setDocumentPassword(_jailedUrl.c_str(), _docPassword.c_str());
else
_loKit->setDocumentPassword(_jailedUrl.c_str(), nullptr);
Log::info("setDocumentPassword returned");
}
void renderTile(StringTokenizer& tokens, const std::shared_ptr<Poco::Net::WebSocket>& ws)
{
assert(ws && "Expected a non-null websocket.");
auto tile = TileDesc::parse(tokens);
// Send back the request with all optional parameters given in the request.
const auto tileMsg = tile.serialize("tile:");
#if ENABLE_DEBUG
const std::string response = tileMsg + " renderid=" + Util::UniqueId() + "\n";
#else
const std::string response = tileMsg + "\n";
#endif
std::vector<char> output;
output.reserve(response.size() + (4 * tile.getWidth() * tile.getHeight()));
output.resize(response.size());
std::memcpy(output.data(), response.data(), response.size());
std::vector<unsigned char> pixmap;
pixmap.resize(output.capacity());
if (!_loKitDocument)
{
Log::error("Tile rendering requested before loading document.");
return;
}
std::unique_lock<std::mutex> lock(_loKitDocument->getLock());
if (_loKitDocument->getViewsCount() <= 0)
{
Log::error("Tile rendering requested without views.");
return;
}
const double area = tile.getWidth() * tile.getHeight();
Timestamp timestamp;
_loKitDocument->paintPartTile(pixmap.data(), tile.getPart(),
tile.getWidth(), tile.getHeight(),
tile.getTilePosX(), tile.getTilePosY(),
tile.getTileWidth(), tile.getTileHeight());
const auto elapsed = timestamp.elapsed();
Log::trace() << "paintTile at (" << tile.getPart() << ',' << tile.getTilePosX() << ',' << tile.getTilePosY()
<< ") " << "ver: " << tile.getVersion() << " rendered in " << (elapsed/1000.)
<< " ms (" << area / elapsed << " MP/s)." << Log::end;
const auto mode = static_cast<LibreOfficeKitTileMode>(_loKitDocument->getTileMode());
if (!png::encodeBufferToPNG(pixmap.data(), tile.getWidth(), tile.getHeight(), output, mode))
{
//FIXME: Return error.
//sendTextFrame("error: cmd=tile kind=failure");
Log::error("Failed to encode tile into PNG.");
return;
}
const auto length = output.size();
if (length > SMALL_MESSAGE_SIZE)
{
const std::string nextmessage = "nextmessage: size=" + std::to_string(length);
ws->sendFrame(nextmessage.data(), nextmessage.size());
}
Log::trace("Sending render-tile response (" + std::to_string(length) + " bytes) for: " + response);
ws->sendFrame(output.data(), length, WebSocket::FRAME_BINARY);
}
void renderCombinedTiles(StringTokenizer& tokens, const std::shared_ptr<Poco::Net::WebSocket>& ws)
{
assert(ws && "Expected a non-null websocket.");
auto tileCombined = TileCombined::parse(tokens);
auto& tiles = tileCombined.getTiles();
Util::Rectangle renderArea;
std::vector<Util::Rectangle> tileRecs;
tileRecs.reserve(tiles.size());
for (auto& tile : tiles)
{
Util::Rectangle rectangle(tile.getTilePosX(), tile.getTilePosY(),
tileCombined.getTileWidth(), tileCombined.getTileHeight());
if (tileRecs.empty())
{
renderArea = rectangle;
}
else
{
renderArea.extend(rectangle);
}
tileRecs.push_back(rectangle);
}
const size_t tilesByX = renderArea.getWidth() / tileCombined.getTileWidth();
const size_t tilesByY = renderArea.getHeight() / tileCombined.getTileHeight();
const size_t pixmapWidth = tilesByX * tileCombined.getWidth();
const size_t pixmapHeight = tilesByY * tileCombined.getHeight();
const size_t pixmapSize = 4 * pixmapWidth * pixmapHeight;
std::vector<unsigned char> pixmap(pixmapSize, 0);
if (!_loKitDocument)
{
Log::error("Tile rendering requested before loading document.");
return;
}
std::unique_lock<std::mutex> lock(_loKitDocument->getLock());
if (_loKitDocument->getViewsCount() <= 0)
{
Log::error("Tile rendering requested without views.");
return;
}
const double area = pixmapWidth * pixmapHeight;
Timestamp timestamp;
_loKitDocument->paintPartTile(pixmap.data(), tileCombined.getPart(),
pixmapWidth, pixmapHeight,
renderArea.getLeft(), renderArea.getTop(),
renderArea.getWidth(), renderArea.getHeight());
const auto elapsed = timestamp.elapsed();
Log::debug() << "paintTile (combined) at (" << renderArea.getLeft() << ", " << renderArea.getTop() << "), ("
<< renderArea.getWidth() << ", " << renderArea.getHeight() << ") ver: " << tileCombined.getVersion()
<< " rendered in " << (elapsed/1000.) << " ms (" << area / elapsed << " MP/s)." << Log::end;
const auto mode = static_cast<LibreOfficeKitTileMode>(_loKitDocument->getTileMode());
std::vector<char> output;
output.reserve(pixmapWidth * pixmapHeight * 4);
size_t tileIndex = 0;
for (Util::Rectangle& tileRect : tileRecs)
{
const size_t positionX = (tileRect.getLeft() - renderArea.getLeft()) / tileCombined.getTileWidth();
const size_t positionY = (tileRect.getTop() - renderArea.getTop()) / tileCombined.getTileHeight();
const auto oldSize = output.size();
const auto pixelWidth = tileCombined.getWidth();
const auto pixelHeight = tileCombined.getHeight();
if (!png::encodeSubBufferToPNG(pixmap.data(), positionX * pixelWidth, positionY * pixelHeight,
pixelWidth, pixelHeight, pixmapWidth, pixmapHeight, output, mode))
{
//FIXME: Return error.
//sendTextFrame("error: cmd=tile kind=failure");
Log::error("Failed to encode tile into PNG.");
return;
}
const auto imgSize = output.size() - oldSize;
Log::trace() << "Encoded tile #" << tileIndex << " in " << imgSize << " bytes." << Log::end;
tiles[tileIndex++].setImgSize(imgSize);
}
#if ENABLE_DEBUG
const auto tileMsg = tileCombined.serialize("tilecombine:") + " renderid=" + Util::UniqueId() + "\n";
#else
const auto tileMsg = tileCombined.serialize("tilecombine:") + "\n";
#endif
Log::trace("Sending back painted tiles for " + tileMsg);
std::vector<char> response;
response.resize(tileMsg.size() + output.size());
std::copy(tileMsg.begin(), tileMsg.end(), response.begin());
std::copy(output.begin(), output.end(), response.begin() + tileMsg.size());
const auto length = response.size();
if (length > SMALL_MESSAGE_SIZE)
{
const std::string nextmessage = "nextmessage: size=" + std::to_string(length);
ws->sendFrame(nextmessage.data(), nextmessage.size());
}
ws->sendFrame(response.data(), length, WebSocket::FRAME_BINARY);
}
private:
static void GlobalCallback(const int nType, const char* pPayload, void* pData)
{
if (TerminationFlag)
{
return;
}
const std::string payload = pPayload ? pPayload : "(nil)";
Log::trace() << "Document::GlobalCallback "
<< LOKitHelper::kitCallbackTypeToString(nType)
<< " [" << payload << "]." << Log::end;
Document* self = reinterpret_cast<Document*>(pData);
if (nType == LOK_CALLBACK_DOCUMENT_PASSWORD_TO_MODIFY ||
nType == LOK_CALLBACK_DOCUMENT_PASSWORD)
{
// Mark the document password type.
self->setDocumentPassword(nType);
return;
}
// Broadcast leftover status indicator callbacks to all clients
self->broadcastCallbackToClients(nType, payload);
}
static void ViewCallback(const int nType, const char* pPayload, void* pData)
{
if (TerminationFlag)
{
return;
}
CallbackDescriptor* pDescr = reinterpret_cast<CallbackDescriptor*>(pData);
assert(pDescr && "Null callback data.");
assert(pDescr->Doc && "Null Document instance.");
const std::string payload = pPayload ? pPayload : "(nil)";
Log::trace() << "Document::ViewCallback [" << pDescr->ViewId
<< "] [" << LOKitHelper::kitCallbackTypeToString(nType)
<< "] [" << payload << "]." << Log::end;
std::unique_lock<std::mutex> lock(pDescr->Doc->_mutex);
if (nType == LOK_CALLBACK_INVALIDATE_VISIBLE_CURSOR ||
nType == LOK_CALLBACK_CELL_CURSOR)
{
Poco::StringTokenizer tokens(payload, ",", Poco::StringTokenizer::TOK_IGNORE_EMPTY | Poco::StringTokenizer::TOK_TRIM);
// Payload may be 'EMPTY'.
if (tokens.count() == 4)
{
auto cursorX = std::stoi(tokens[0]);
auto cursorY = std::stoi(tokens[1]);
auto cursorWidth = std::stoi(tokens[2]);
auto cursorHeight = std::stoi(tokens[3]);
pDescr->Doc->_tileQueue->updateCursorPosition(0, 0, cursorX, cursorY, cursorWidth, cursorHeight);
}
}
else if (nType == LOK_CALLBACK_INVALIDATE_VIEW_CURSOR ||
nType == LOK_CALLBACK_CELL_VIEW_CURSOR)
{
Poco::JSON::Parser parser;
const auto result = parser.parse(payload);
const auto& command = result.extract<Poco::JSON::Object::Ptr>();
auto viewId = command->get("viewId").toString();
auto part = command->get("part").toString();
auto text = command->get("rectangle").toString();
Poco::StringTokenizer tokens(text, ",", Poco::StringTokenizer::TOK_IGNORE_EMPTY | Poco::StringTokenizer::TOK_TRIM);
// Payload may be 'EMPTY'.
if (tokens.count() == 4)
{
auto cursorX = std::stoi(tokens[0]);
auto cursorY = std::stoi(tokens[1]);
auto cursorWidth = std::stoi(tokens[2]);
auto cursorHeight = std::stoi(tokens[3]);
pDescr->Doc->_tileQueue->updateCursorPosition(std::stoi(viewId), std::stoi(part), cursorX, cursorY, cursorWidth, cursorHeight);
}
}
pDescr->Doc->_tileQueue->put("callback " + std::to_string(pDescr->ViewId) + " " + std::to_string(nType) + " " + payload);
}
static void DocumentCallback(const int nType, const char* pPayload, void* pData)
{
if (TerminationFlag)
{
return;
}
const std::string payload = pPayload ? pPayload : "(nil)";
Log::trace() << "Document::DocumentCallback "
<< LOKitHelper::kitCallbackTypeToString(nType)
<< " [" << payload << "]." << Log::end;
Document* self = reinterpret_cast<Document*>(pData);
self->broadcastCallbackToClients(nType, pPayload);
}
/// Helper method to broadcast callback and its payload to all clients
void broadcastCallbackToClients(const int nType, const std::string& payload)
{
std::unique_lock<std::mutex> lock(_mutex);
// "-1" means broadcast
_tileQueue->put("callback -1 " + std::to_string(nType) + " " + payload);
}
/// Load a document (or view) and register callbacks.
std::shared_ptr<lok::Document> onLoad(const std::string& sessionId,
const std::string& uri,
const std::string& userName,
const std::string& docPassword,
const std::string& renderOpts,
const bool haveDocPassword) override
{
Log::info("Session " + sessionId + " is loading. " + std::to_string(_clientViews) + " views loaded.");
std::unique_lock<std::mutex> lock(_mutex);
while (_isLoading)
{
_cvLoading.wait(lock);
}
// Flag and release lock.
++_isLoading;
lock.unlock();
try
{
load(sessionId, uri, userName, docPassword, renderOpts, haveDocPassword);
if (!_loKitDocument || !_loKitDocument->get())
{
return nullptr;
}
}
catch (const std::exception& exc)
{
Log::error("Exception while loading [" + uri + "] : " + exc.what());
return nullptr;
}
// Done loading, let the next one in (if any).
assert(_loKitDocument && _loKitDocument->get() && "Uninitialized lok::Document instance");
lock.lock();
++_clientViews;
--_isLoading;
_cvLoading.notify_one();
return _loKitDocument;
}
void onUnload(const ChildSession& session) override
{
const auto& sessionId = session.getId();
Log::info("Unloading [" + sessionId + "].");
_tileQueue->removeCursorPosition(session.getViewId());
if (_loKitDocument == nullptr)
{
Log::error("Unloading session [" + sessionId + "] without loKitDocument.");
return;
}
--_clientViews;
Log::info() << "Document [" << _url << "] session ["
<< sessionId << "] unloaded, " << _clientViews
<< " view" << (_clientViews != 1 ? "s" : "")
<< Log::end;
std::unique_lock<std::mutex> lock(_loKitDocument->getLock());
const auto viewId = session.getViewId();
_loKitDocument->setView(viewId);
_loKitDocument->registerCallback(nullptr, nullptr);
_loKitDocument->destroyView(viewId);
_viewIdToCallbackDescr.erase(viewId);
Log::debug("Destroyed view " + std::to_string(viewId));
lock.unlock();
// Broadcast updated view info
notifyViewInfo();
}
/// Notify all views of viewId and their associated usernames
void notifyViewInfo() override
{
std::unique_lock<std::mutex> lockLokDoc(_loKitDocument->getLock());
// Get the list of view ids from the core
int viewCount = _loKitDocument->getViewsCount();
std::vector<int> viewIds(viewCount);
_loKitDocument->getViewIds(viewIds.data(), viewCount);
lockLokDoc.unlock();
std::unique_lock<std::mutex> lock(_mutex);
// Store the list of viewid, username mapping in a map
std::map<int, std::string> viewInfoMap;
for (auto& connectionIt : _connections)
{
if (connectionIt.second->isRunning())
{
const auto session = connectionIt.second->getSession();
const auto viewId = session->getViewId();
viewInfoMap[viewId] = session->getViewUserName();
}
}
// Double check if list of viewids from core and our list matches,
// and create an array of JSON objects containing id and username
Array::Ptr viewInfoArray = new Array();
int arrayIndex = 0;
for (auto& viewId: viewIds)
{
Object::Ptr viewInfoObj = new Object();
viewInfoObj->set("id", viewId);
if (viewInfoMap.find(viewId) == viewInfoMap.end())
{
Log::error("No username found for viewId [" + std::to_string(viewId) + "].");
viewInfoObj->set("username", "Unknown");
}
else
{
viewInfoObj->set("username", viewInfoMap[viewId]);
}
viewInfoArray->set(arrayIndex++, viewInfoObj);
}
std::ostringstream ossViewInfo;
viewInfoArray->stringify(ossViewInfo);
// Broadcast updated viewinfo to all _active_ connections
for (auto& connectionIt: _connections)
{
if (connectionIt.second->isRunning())
{
auto session = connectionIt.second->getSession();
if (session->isActive())
{
session->sendTextFrame("viewinfo: " + ossViewInfo.str());
}
}
}
}
private:
std::shared_ptr<lok::Document> load(const std::string& sessionId,
const std::string& uri,
const std::string& userName,
const std::string& docPassword,
const std::string& renderOpts,
const bool haveDocPassword)
{
const unsigned intSessionId = Util::decodeId(sessionId);
const auto it = _connections.find(intSessionId);
if (it == _connections.end() || !it->second)
{
Log::error("Cannot find session [" + sessionId + "].");
return nullptr;
}
auto session = it->second->getSession();
int viewId = 0;
std::unique_lock<std::mutex> lockLokDoc;
if (!_loKitDocument)
{
// This is the first time we are loading the document
Log::info("Loading new document from URI: [" + uri + "] for session [" + sessionId + "].");
auto lock(_loKit->getLock());
if (LIBREOFFICEKIT_HAS(_loKit->get(), registerCallback))
{
_loKit->get()->pClass->registerCallback(_loKit->get(), GlobalCallback, this);
const auto flags = LOK_FEATURE_DOCUMENT_PASSWORD
| LOK_FEATURE_DOCUMENT_PASSWORD_TO_MODIFY;
_loKit->setOptionalFeatures(flags);
}
// Save the provided password with us and the jailed url
_haveDocPassword = haveDocPassword;
_docPassword = docPassword;
_jailedUrl = uri;
_isDocPasswordProtected = false;
Log::debug("Calling lokit::documentLoad.");
_loKitDocument = _loKit->documentLoad(uri.c_str());
Log::debug("Returned lokit::documentLoad.");
auto l(_loKitDocument->getLock());
lockLokDoc.swap(l);
if (!_loKitDocument || !_loKitDocument->get())
{
Log::error("Failed to load: " + uri + ", error: " + _loKit->getError());
// Checking if wrong password or no password was reason for failure.
if (_isDocPasswordProtected)
{
Log::info("Document [" + uri + "] is password protected.");
if (!_haveDocPassword)
{
Log::info("No password provided for password-protected document [" + uri + "].");
std::string passwordFrame = "passwordrequired:";
if (_docPasswordType == PasswordType::ToView)
passwordFrame += "to-view";
else if (_docPasswordType == PasswordType::ToModify)
passwordFrame += "to-modify";
session->sendTextFrame("error: cmd=load kind=" + passwordFrame);
}
else
{
Log::info("Wrong password for password-protected document [" + uri + "].");
session->sendTextFrame("error: cmd=load kind=wrongpassword");
}
}
return nullptr;
}
// Only save the options on opening the document.
// No support for changing them after opening a document.
_renderOpts = renderOpts;
}
else
{
auto l(_loKitDocument->getLock());
lockLokDoc.swap(l);
// Check if this document requires password
if (_isDocPasswordProtected)
{
if (!haveDocPassword)
{
std::string passwordFrame = "passwordrequired:";
if (_docPasswordType == PasswordType::ToView)
passwordFrame += "to-view";
else if (_docPasswordType == PasswordType::ToModify)
passwordFrame += "to-modify";
session->sendTextFrame("error: cmd=load kind=" + passwordFrame);
return nullptr;
}
else if (docPassword != _docPassword)
{
session->sendTextFrame("error: cmd=load kind=wrongpassword");
return nullptr;
}
}
Log::info("Loading view to document from URI: [" + uri + "] for session [" + sessionId + "].");
_loKitDocument->createView();
}
Object::Ptr renderOptsObj = new Object();
// Fill the object with renderoptions, if any
if (!_renderOpts.empty()) {
Parser parser;
Poco::Dynamic::Var var = parser.parse(_renderOpts);
renderOptsObj = var.extract<Object::Ptr>();
}
// Append name of the user, if any, who opened the document to rendering options
if (!userName.empty())
{
Object::Ptr authorContainer = new Object();
Object::Ptr authorObj = new Object();
authorObj->set("type", "string");
std::string decodedUserName;
URI::decode(userName, decodedUserName);
authorObj->set("value", decodedUserName);
renderOptsObj->set(".uno:Author", authorObj);
}
std::ostringstream ossRenderOpts;
renderOptsObj->stringify(ossRenderOpts);
// initializeForRendering() should be called before
// registerCallback(), as the previous creates a new view in Impress.
_loKitDocument->initializeForRendering(ossRenderOpts.str().c_str());
session->setViewId((viewId = _loKitDocument->getView()));
_viewIdToCallbackDescr.emplace(viewId,
std::unique_ptr<CallbackDescriptor>(new CallbackDescriptor({ this, viewId })));
_loKitDocument->registerCallback(ViewCallback, _viewIdToCallbackDescr[viewId].get());
Log::info() << "Document [" << _url << "] view ["
<< viewId << "] loaded, leaving "
<< (_clientViews + 1) << " views." << Log::end;
return _loKitDocument;
}
void run() override
{
Util::setThreadName("lok_handler");
Log::debug("Thread started.");
try
{
while (!_stop && !TerminationFlag)
{
const auto input = _tileQueue->get();
if (_stop || TerminationFlag)
{
break;
}
const std::string message(input.data(), input.size());
StringTokenizer tokens(message, " ");
if (tokens[0] == "eof")
{
Log::info("Received EOF. Finishing.");
break;
}
if (tokens[0] == "tile")
{
renderTile(tokens, _ws);
}
else if (tokens[0] == "tilecombine")
{
renderCombinedTiles(tokens, _ws);
}
else if (tokens[0] == "callback")
{
int viewId = std::stoi(tokens[1]); // -1 means broadcast
int type = std::stoi(tokens[2]);
// payload is the rest of the message
std::string payload(message.substr(tokens[0].length() + tokens[1].length() + tokens[2].length() + 3));
// Forward the callback to the same view, demultiplexing is done by the LibreOffice core.
// TODO: replace with a map to be faster.
bool isFound = false;
for (auto& it : _connections)
{
auto session = it.second->getSession();
if (session && ((session->getViewId() == viewId) || (viewId == -1)))
{
if (it.second->isRunning())
{
isFound = true;
session->loKitCallback(type, payload);
}
else
{
Log::error() << "Connection thread for session " << it.second->getSessionId() << " for view "
<< viewId << " is not running. Dropping [" << LOKitHelper::kitCallbackTypeToString(type)
<< "] payload [" << payload << "]." << Log::end;
}
break;
}
}
if (!isFound)
{
Log::warn() << "Document::ViewCallback. The message [" << viewId
<< "] [" << LOKitHelper::kitCallbackTypeToString(type)
<< "] [" << payload << "] is not sent to Master Session." << Log::end;
}
}
else
{
Log::error("Unexpected tile request: [" + message + "].");
}
}
}
catch (const std::exception& exc)
{
Log::error(std::string("QueueHandler::run: Exception: ") + exc.what());
}
Log::debug("Thread finished.");
}
private:
std::shared_ptr<lok::Office> _loKit;
const std::string _jailId;
const std::string _docKey;
const std::string _url;
std::string _jailedUrl;
std::string _renderOpts;
std::shared_ptr<lok::Document> _loKitDocument;
std::shared_ptr<TileQueue> _tileQueue;
std::shared_ptr<WebSocket> _ws;
// Document password provided
std::string _docPassword;
// Whether password was provided or not
bool _haveDocPassword;
// Whether document is password protected
bool _isDocPasswordProtected;
// Whether password is required to view the document, or modify it
PasswordType _docPasswordType;
std::atomic<bool> _stop;
mutable std::mutex _mutex;
std::condition_variable _cvLoading;
std::atomic_size_t _isLoading;
std::map<int, std::unique_ptr<CallbackDescriptor>> _viewIdToCallbackDescr;
std::map<unsigned, std::shared_ptr<Connection>> _connections;
Poco::Thread _callbackThread;
std::atomic_size_t _clientViews;
};
void lokit_main(const std::string& childRoot,
const std::string& sysTemplate,
const std::string& loTemplate,
const std::string& loSubPath,
bool noCapabilities,
bool queryVersion)
{
// Reinitialize logging when forked.
const bool logToFile = getenv("LOOL_LOGFILE");
const auto logFilename = getenv("LOOL_LOGFILENAME");
std::map<std::string, std::string> logProperties;
if (logToFile && logFilename)
{
logProperties["path"] = std::string(logFilename);
}
Log::initialize("kit", getenv("LOOL_LOGLEVEL"), getenv("LOOL_LOGCOLOR"), logToFile, logProperties);
Util::rng::reseed();
assert(!childRoot.empty());
assert(!sysTemplate.empty());
assert(!loTemplate.empty());
assert(!loSubPath.empty());
// We only host a single document in our lifetime.
std::shared_ptr<Document> document;
// Ideally this will be a random ID, but forkit will cleanup
// our jail directory when we die, and it's simpler to know
// the jailId (i.e. the path) implicitly by knowing our pid.
static const std::string pid = std::to_string(Process::id());
static const std::string jailId = pid;
Util::setThreadName("loolkit");
Log::debug("Process started.");
Util::setTerminationSignals();
Util::setFatalSignals();
std::string userdir_url;
std::string instdir_path;
Path jailPath;
bool bRunInsideJail = !noCapabilities;
try
{
jailPath = Path::forDirectory(childRoot + "/" + jailId);
Log::info("Jail path: " + jailPath.toString());
File(jailPath).createDirectories();
if (bRunInsideJail)
{
userdir_url = "file:///user";
instdir_path = "/" + loSubPath + "/program";
// Create a symlink inside the jailPath so that the absolute pathname loTemplate, when
// interpreted inside a chroot at jailPath, points to loSubPath (relative to the chroot).
symlinkPathToJail(jailPath, loTemplate, loSubPath);
// Font paths can end up as realpaths so match that too.
char *resolved = realpath(loTemplate.c_str(), NULL);
if (resolved)
{
if (strcmp(loTemplate.c_str(), resolved) != 0)
symlinkPathToJail(jailPath, std::string(resolved), loSubPath);
free (resolved);
}
Path jailLOInstallation(jailPath, loSubPath);
jailLOInstallation.makeDirectory();
File(jailLOInstallation).createDirectory();
// Copy (link) LO installation and other necessary files into it from the template.
bool bLoopMounted = false;
if (getenv("LOOL_BIND_MOUNT"))
{
Path usrSrcPath(sysTemplate, "usr");
Path usrDestPath(jailPath, "usr");
File(usrDestPath).createDirectory();
std::string mountCommand =
std::string("loolmount ") +
usrSrcPath.toString() +
std::string(" ") +
usrDestPath.toString();
Log::debug("Initializing jail bind mount.");
bLoopMounted = !system(mountCommand.c_str());
Log::debug("Initialized jail bind mount.");
}
linkOrCopy(sysTemplate, jailPath,
bLoopMounted ? COPY_NO_USR : COPY_ALL);
linkOrCopy(loTemplate, jailLOInstallation, COPY_LO);
// We need this because sometimes the hostname is not resolved
const auto networkFiles = {"/etc/host.conf", "/etc/hosts", "/etc/nsswitch.conf", "/etc/resolv.conf"};
for (const auto& filename : networkFiles)
{
const auto etcPath = Path(jailPath, filename).toString();
const File networkFile(filename);
if (networkFile.exists() && !File(etcPath).exists())
{
networkFile.copyTo(etcPath);
}
}
Log::debug("Initialized jail files.");
// Create the urandom and random devices
File(Path(jailPath, "/dev")).createDirectory();
if (mknod((jailPath.toString() + "/dev/random").c_str(),
S_IFCHR | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH,
makedev(1, 8)) != 0)
{
Log::syserror("mknod(" + jailPath.toString() + "/dev/random) failed.");
}
if (mknod((jailPath.toString() + "/dev/urandom").c_str(),
S_IFCHR | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH,
makedev(1, 9)) != 0)
{
Log::syserror("mknod(" + jailPath.toString() + "/dev/urandom) failed.");
}
Log::info("chroot(\"" + jailPath.toString() + "\")");
if (chroot(jailPath.toString().c_str()) == -1)
{
Log::syserror("chroot(\"" + jailPath.toString() + "\") failed.");
std::_Exit(Application::EXIT_SOFTWARE);
}
if (chdir("/") == -1)
{
Log::syserror("chdir(\"/\") in jail failed.");
std::_Exit(Application::EXIT_SOFTWARE);
}
dropCapability(CAP_SYS_CHROOT);
dropCapability(CAP_MKNOD);
dropCapability(CAP_FOWNER);
Log::debug("Initialized jail nodes, dropped caps.");
}
else // noCapabilities set
{
Log::info("Using template " + loTemplate + " as install subpath - skipping jail setup");
userdir_url = "file:///" + jailPath.toString() + "/user";
instdir_path = "/" + loTemplate + "/program";
}
std::shared_ptr<lok::Office> loKit;
{
const char *instdir = instdir_path.c_str();
const char *userdir = userdir_url.c_str();
auto kit = UnitKit::get().lok_init(instdir, userdir);
if (!kit)
{
kit = lok_init_2(instdir, userdir);
}
loKit = std::make_shared<lok::Office>(kit);
if (!loKit || !loKit->get())
{
Log::error("LibreOfficeKit initialization failed. Exiting.");
std::_Exit(Application::EXIT_SOFTWARE);
}
}
assert(loKit && loKit->get());
Log::info("Process is ready.");
// Open websocket connection between the child process and WSD.
HTTPClientSession cs("127.0.0.1", MasterPortNumber);
cs.setTimeout(0);
std::string requestUrl = std::string(NEW_CHILD_URI) + "pid=" + pid;
if (queryVersion)
{
char* versionInfo = loKit->getVersionInfo();
std::string encodedVersionStr;
URI::encode(std::string(versionInfo), "", encodedVersionStr);
requestUrl += "&version=" + encodedVersionStr;
free(versionInfo);
}
HTTPRequest request(HTTPRequest::HTTP_GET, requestUrl);
HTTPResponse response;
auto ws = std::make_shared<WebSocket>(cs, request, response);
ws->setReceiveTimeout(0);
auto queue = std::make_shared<TileQueue>();
const std::string socketName = "ChildControllerWS";
IoUtil::SocketProcessor(ws,
[&socketName, &ws, &document, &loKit, &queue](const std::vector<char>& data)
{
std::string message(data.data(), data.size());
if (UnitKit::get().filterKitMessage(ws, message))
return true;
Log::debug(socketName + ": recv [" + LOOLProtocol::getAbbreviatedMessage(message) + "].");
StringTokenizer tokens(message, " ", StringTokenizer::TOK_IGNORE_EMPTY | StringTokenizer::TOK_TRIM);
// Note: Syntax or parsing errors here are unexpected and fatal.
if (TerminationFlag)
{
Log::debug("Too late, we're going down");
}
else if (tokens[0] == "session")
{
const std::string& sessionId = tokens[1];
const unsigned intSessionId = Util::decodeId(sessionId);
const std::string& docKey = tokens[2];
std::string url;
URI::decode(docKey, url);
Log::info("New session [" + sessionId + "] request on url [" + url + "].");
if (!document)
{
document = std::make_shared<Document>(loKit, jailId, docKey, url, queue, ws);
}
// Validate and create session.
if (!(url == document->getUrl() &&
document->createSession(sessionId, intSessionId)))
{
Log::debug("CreateSession failed.");
}
}
else if (tokens[0] == "tile" || tokens[0] == "tilecombine" || tokens[0] == "canceltiles")
{
if (document)
{
queue->put(message);
}
else
{
Log::warn("No document while processing " + tokens[0] + " request.");
}
}
else if (document && document->canDiscard())
{
Log::info("Last session discarded. Terminating.");
TerminationFlag = true;
}
else
{
Log::error("Bad or unknown token [" + tokens[0] + "]");
}
return true;
},
[]() {},
[&document]()
{
if (document && document->canDiscard())
{
Log::info("Last session discarded. Terminating.");
TerminationFlag = true;
}
return TerminationFlag.load();
});
// Clean up jail if we created one
if (bRunInsideJail && !jailPath.isRelative())
{
// In theory we should here do Util::removeFile("/", true), because we are inside the
// chroot jail, and all of it can be removed now when we are exiting. (At least the root
// of the chroot jail probably would not be removed even if we tried, so we still would
// need to complete the cleanup in loolforkit.)
// But: It is way too risky to actually do that (effectively, "rm -rf /") as it would
// trash a developer's machine if something goes wrong while hacking and debugging and
// the process isn't in a chroot after all when it comes here.
// So just remove what we can reasonably safely assume won't exist as global pathnames
// on a developer's machine, loSubpath (typically "/lo") and JAILED_DOCUMENT_ROOT
// ("/user/docs/").
Log::info("Removing '/" + loSubPath + "'");
Util::removeFile("/" + loSubPath, true);
Log::info("Removing '" + std::string(JAILED_DOCUMENT_ROOT) + "'");
Util::removeFile(std::string(JAILED_DOCUMENT_ROOT), true);
}
}
catch (const Exception& exc)
{
Log::error() << "Poco Exception: " << exc.displayText()
<< (exc.nested() ? " (" + exc.nested()->displayText() + ")" : "")
<< Log::end;
}
catch (const std::exception& exc)
{
Log::error(std::string("Exception: ") + exc.what());
}
// Sleep a second here in case we get a fatal signal just when about to finish up, which sadly
// seems to happen often, so that handleFatalSignal() in Util.cpp has time to produce a
// backtrace.
sleep(1);
Log::info("Process finished.");
std::_Exit(Application::EXIT_OK);
}
/// Initializes LibreOfficeKit for cross-fork re-use.
bool globalPreinit(const std::string &loTemplate)
{
const std::string libSofficeapp = loTemplate + "/program/" LIB_SOFFICEAPP;
const std::string libMerged = loTemplate + "/program/" LIB_MERGED;
std::string loadedLibrary;
void *handle;
if (File(libMerged).exists())
{
Log::trace("dlopen(" + libMerged + ", RTLD_GLOBAL|RTLD_NOW)");
handle = dlopen(libMerged.c_str(), RTLD_GLOBAL|RTLD_NOW);
if (!handle)
{
Log::error("Failed to load " + libMerged + ": " + std::string(dlerror()));
return false;
}
loadedLibrary = libMerged;
}
else
{
if (File(libSofficeapp).exists())
{
Log::trace("dlopen(" + libSofficeapp + ", RTLD_GLOBAL|RTLD_NOW)");
handle = dlopen(libSofficeapp.c_str(), RTLD_GLOBAL|RTLD_NOW);
if (!handle)
{
Log::error("Failed to load " + libSofficeapp + ": " + std::string(dlerror()));
return false;
}
loadedLibrary = libSofficeapp;
}
else
{
Log::error("Neither " + libSofficeapp + " or " + libMerged + " exist.");
return false;
}
}
LokHookPreInit* preInit = (LokHookPreInit *)dlsym(handle, "lok_preinit");
if (!preInit)
{
Log::error("No lok_preinit symbol in " + loadedLibrary + ": " + std::string(dlerror()));
return false;
}
Log::trace("lok_preinit(" + loTemplate + "/program\", \"file:///user\")");
if (preInit((loTemplate + "/program").c_str(), "file:///user") != 0)
{
Log::error("lok_preinit() in " + loadedLibrary + " failed");
return false;
}
return true;
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
Reference in a new issue View git blame Copy permalink