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barrier/lib/arch/CArchDaemonWindows.cpp

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/*
* synergy -- mouse and keyboard sharing utility
* Copyright (C) 2002 Chris Schoeneman
*
* This package is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* found in the file COPYING that should have accompanied this file.
*
* This package 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.
*/
#include "CArchDaemonWindows.h"
#include "CArch.h"
#include "CArchMiscWindows.h"
#include "XArchWindows.h"
#include "stdvector.h"
//
// CArchDaemonWindows
//
CArchDaemonWindows* CArchDaemonWindows::s_daemon = NULL;
CArchDaemonWindows::CArchDaemonWindows() :
m_daemonThread(NULL)
{
// do nothing
}
CArchDaemonWindows::~CArchDaemonWindows()
{
// do nothing
}
int
CArchDaemonWindows::runDaemon(RunFunc runFunc)
{
assert(s_daemon != NULL);
return s_daemon->doRunDaemon(runFunc);
}
void
CArchDaemonWindows::daemonRunning(bool running)
{
// if s_daemon is NULL we assume we're running on the windows
// 95 family and we just ignore this call so the caller doesn't
// have to go through the trouble of not calling it on the
// windows 95 family.
if (s_daemon != NULL) {
s_daemon->doDaemonRunning(running);
}
}
void
CArchDaemonWindows::daemonFailed(int result)
{
// if s_daemon is NULL we assume we're running on the windows
// 95 family and we just ignore this call so the caller doesn't
// have to go through the trouble of not calling it on the
// windows 95 family.
if (s_daemon != NULL) {
throw XArchDaemonRunFailed(result);
}
}
void
CArchDaemonWindows::installDaemon(const char* name,
const char* description,
const char* pathname,
const char* commandLine,
bool allUsers)
{
// if not for all users then use the user's autostart registry.
// key. if windows 95 family then use windows 95 services key.
if (!allUsers || CArchMiscWindows::isWindows95Family()) {
// open registry
HKEY key = CArchMiscWindows::isWindows95Family() ?
open95ServicesKey() : openUserStartupKey();
if (key == NULL) {
// can't open key
throw XArchDaemonInstallFailed(new XArchEvalWindows);
}
// construct entry
std::string value;
value += "\"";
value += pathname;
value += "\" ";
value += commandLine;
// install entry
CArchMiscWindows::setValue(key, name, value);
// clean up
CArchMiscWindows::closeKey(key);
}
// windows NT family services
else {
// open service manager
SC_HANDLE mgr = OpenSCManager(NULL, NULL, GENERIC_WRITE);
if (mgr == NULL) {
// can't open service manager
throw XArchDaemonInstallFailed(new XArchEvalWindows);
}
// create the service
SC_HANDLE service = CreateService(mgr,
name,
name,
0,
SERVICE_WIN32_OWN_PROCESS |
SERVICE_INTERACTIVE_PROCESS,
SERVICE_AUTO_START,
SERVICE_ERROR_NORMAL,
pathname,
NULL,
NULL,
NULL,
NULL,
NULL);
if (service == NULL) {
// can't create service
// FIXME -- handle ERROR_SERVICE_EXISTS
DWORD err = GetLastError();
CloseServiceHandle(mgr);
throw XArchDaemonInstallFailed(new XArchEvalWindows(err));
}
// done with service and manager
CloseServiceHandle(service);
CloseServiceHandle(mgr);
// open the registry key for this service
HKEY key = openNTServicesKey();
key = CArchMiscWindows::openKey(key, name);
if (key == NULL) {
// can't open key
DWORD err = GetLastError();
try {
uninstallDaemon(name, allUsers);
}
catch (...) {
// ignore
}
throw XArchDaemonInstallFailed(new XArchEvalWindows(err));
}
// set the description
CArchMiscWindows::setValue(key, _T("Description"), description);
// set command line
key = CArchMiscWindows::openKey(key, _T("Parameters"));
if (key == NULL) {
// can't open key
DWORD err = GetLastError();
CArchMiscWindows::closeKey(key);
try {
uninstallDaemon(name, allUsers);
}
catch (...) {
// ignore
}
throw XArchDaemonInstallFailed(new XArchEvalWindows(err));
}
CArchMiscWindows::setValue(key, _T("CommandLine"), commandLine);
// done with registry
CArchMiscWindows::closeKey(key);
}
}
void
CArchDaemonWindows::uninstallDaemon(const char* name, bool allUsers)
{
// if not for all users then use the user's autostart registry.
// key. if windows 95 family then use windows 95 services key.
if (!allUsers || CArchMiscWindows::isWindows95Family()) {
// open registry
HKEY key = CArchMiscWindows::isWindows95Family() ?
open95ServicesKey() : openUserStartupKey();
if (key == NULL) {
// can't open key. daemon is probably not installed.
throw XArchDaemonUninstallNotInstalled(new XArchEvalWindows);
}
// remove entry
CArchMiscWindows::deleteValue(key, name);
// clean up
CArchMiscWindows::closeKey(key);
}
// windows NT family services
else {
// remove parameters for this service. ignore failures.
HKEY key = openNTServicesKey();
key = CArchMiscWindows::openKey(key, name);
if (key != NULL) {
CArchMiscWindows::deleteKey(key, _T("Parameters"));
CArchMiscWindows::closeKey(key);
}
// open service manager
SC_HANDLE mgr = OpenSCManager(NULL, NULL, GENERIC_WRITE);
if (mgr == NULL) {
// can't open service manager
throw XArchDaemonUninstallFailed(new XArchEvalWindows);
}
// open the service. oddly, you must open a service to delete it.
SC_HANDLE service = OpenService(mgr, name, DELETE);
if (service == NULL) {
DWORD err = GetLastError();
CloseServiceHandle(mgr);
if (err != ERROR_SERVICE_DOES_NOT_EXIST) {
throw XArchDaemonUninstallFailed(new XArchEvalWindows(err));
}
throw XArchDaemonUninstallNotInstalled(new XArchEvalWindows(err));
}
// delete the service
const bool okay = (DeleteService(service) == 0);
const DWORD err = GetLastError();
// clean up
CloseServiceHandle(service);
CloseServiceHandle(mgr);
// handle failure. ignore error if service isn't installed anymore.
if (!okay && isDaemonInstalled(name, allUsers)) {
if (err != ERROR_SERVICE_MARKED_FOR_DELETE) {
throw XArchDaemonUninstallFailed(new XArchEvalWindows(err));
}
throw XArchDaemonUninstallNotInstalled(new XArchEvalWindows(err));
}
}
}
int
CArchDaemonWindows::daemonize(const char* name, DaemonFunc func)
{
assert(name != NULL);
assert(func != NULL);
// windows 95 family services
if (CArchMiscWindows::isWindows95Family()) {
typedef DWORD (WINAPI *RegisterServiceProcessT)(DWORD, DWORD);
// mark this process as a service so it's not killed when the
// user logs off.
HINSTANCE kernel = LoadLibrary("kernel32.dll");
if (kernel == NULL) {
throw XArchDaemonFailed(new XArchEvalWindows);
}
RegisterServiceProcessT RegisterServiceProcess =
reinterpret_cast<RegisterServiceProcessT>(
GetProcAddress(kernel,
"RegisterServiceProcess"));
if (RegisterServiceProcess == NULL) {
// missing RegisterServiceProcess function
DWORD err = GetLastError();
FreeLibrary(kernel);
throw XArchDaemonFailed(new XArchEvalWindows(err));
}
if (RegisterServiceProcess(NULL, 1) == 0) {
// RegisterServiceProcess failed
DWORD err = GetLastError();
FreeLibrary(kernel);
throw XArchDaemonFailed(new XArchEvalWindows(err));
}
FreeLibrary(kernel);
// now simply call the daemon function
return func(1, &name);
}
// windows NT family services
else {
// save daemon function
m_daemonFunc = func;
// construct the service entry
SERVICE_TABLE_ENTRY entry[2];
entry[0].lpServiceName = const_cast<char*>(name);
entry[0].lpServiceProc = &CArchDaemonWindows::serviceMainEntry;
entry[1].lpServiceName = NULL;
entry[1].lpServiceProc = NULL;
// hook us up to the service control manager. this won't return
// (if successful) until the processes have terminated.
s_daemon = this;
if (StartServiceCtrlDispatcher(entry) == 0) {
// StartServiceCtrlDispatcher failed
s_daemon = NULL;
throw XArchDaemonFailed(new XArchEvalWindows);
}
s_daemon = NULL;
return m_daemonResult;
}
}
bool
CArchDaemonWindows::canInstallDaemon(const char* name, bool allUsers)
{
// if not for all users then use the user's autostart registry.
// key. if windows 95 family then use windows 95 services key.
if (!allUsers || CArchMiscWindows::isWindows95Family()) {
// check if we can open the registry key
HKEY key = CArchMiscWindows::isWindows95Family() ?
open95ServicesKey() : openUserStartupKey();
CArchMiscWindows::closeKey(key);
return (key != NULL);
}
// windows NT family services
else {
// check if we can open service manager for write
SC_HANDLE mgr = OpenSCManager(NULL, NULL, GENERIC_WRITE);
if (mgr == NULL) {
return false;
}
CloseServiceHandle(mgr);
// check if we can open the registry key for this service
HKEY key = openNTServicesKey();
key = CArchMiscWindows::openKey(key, name);
key = CArchMiscWindows::openKey(key, _T("Parameters"));
CArchMiscWindows::closeKey(key);
return (key != NULL);
}
}
bool
CArchDaemonWindows::isDaemonInstalled(const char* name, bool allUsers)
{
// if not for all users then use the user's autostart registry.
// key. if windows 95 family then use windows 95 services key.
if (!allUsers || CArchMiscWindows::isWindows95Family()) {
// check if we can open the registry key
HKEY key = CArchMiscWindows::isWindows95Family() ?
open95ServicesKey() : openUserStartupKey();
if (key == NULL) {
return false;
}
// check for entry
const bool installed = !CArchMiscWindows::readValueString(key,
name).empty();
// clean up
CArchMiscWindows::closeKey(key);
return installed;
}
// windows NT family services
else {
// check parameters for this service
HKEY key = openNTServicesKey();
key = CArchMiscWindows::openKey(key, name);
key = CArchMiscWindows::openKey(key, _T("Parameters"));
if (key != NULL) {
const bool installed = !CArchMiscWindows::readValueString(key,
_T("CommandLine")).empty();
CArchMiscWindows::closeKey(key);
if (!installed) {
return false;
}
}
// open service manager
SC_HANDLE mgr = OpenSCManager(NULL, NULL, GENERIC_READ);
if (mgr == NULL) {
return false;
}
// open the service
SC_HANDLE service = OpenService(mgr, name, GENERIC_READ);
// clean up
if (service != NULL) {
CloseServiceHandle(service);
}
CloseServiceHandle(mgr);
return (service != NULL);
}
}
HKEY
CArchDaemonWindows::openNTServicesKey()
{
static const char* s_keyNames[] = {
_T("SYSTEM"),
_T("CurrentControlSet"),
_T("Services"),
NULL
};
return CArchMiscWindows::openKey(HKEY_LOCAL_MACHINE, s_keyNames);
}
HKEY
CArchDaemonWindows::open95ServicesKey()
{
static const char* s_keyNames[] = {
_T("Software"),
_T("Microsoft"),
_T("Windows"),
_T("CurrentVersion"),
_T("RunServices"),
NULL
};
return CArchMiscWindows::openKey(HKEY_LOCAL_MACHINE, s_keyNames);
}
HKEY
CArchDaemonWindows::openUserStartupKey()
{
static const char* s_keyNames[] = {
_T("Software"),
_T("Microsoft"),
_T("Windows"),
_T("CurrentVersion"),
_T("Run"),
NULL
};
return CArchMiscWindows::openKey(HKEY_CURRENT_USER, s_keyNames);
}
int
CArchDaemonWindows::doRunDaemon(RunFunc run)
{
// should only be called from DaemonFunc
assert(m_serviceMutex != NULL);
assert(run != NULL);
ARCH->lockMutex(m_serviceMutex);
try {
int result;
m_serviceHandlerWaiting = false;
m_serviceRunning = false;
for (;;) {
// mark server as running
setStatus(SERVICE_RUNNING);
// run callback in another thread
m_serviceRunning = true;
m_daemonThread = ARCH->newThread(
&CArchDaemonWindows::runDaemonThreadEntry, run);
ARCH->wait(m_daemonThread, -1.0);
result = reinterpret_cast<int>(
ARCH->getResultOfThread(m_daemonThread));
m_serviceRunning = false;
// notify handler that the server stopped. if handler
// isn't waiting then we stopped unexpectedly and we
// quit.
if (m_serviceHandlerWaiting) {
m_serviceHandlerWaiting = false;
ARCH->broadcastCondVar(m_serviceCondVar);
}
else {
break;
}
// wait until we're told what to do next
while (m_serviceState != SERVICE_RUNNING &&
m_serviceState != SERVICE_STOPPED) {
ARCH->waitCondVar(m_serviceCondVar, m_serviceMutex, -1.0);
}
// exit loop if we've been told to stop
if (m_serviceState == SERVICE_STOPPED) {
break;
}
// done with callback thread
ARCH->closeThread(m_daemonThread);
m_daemonThread = NULL;
}
// prevent daemonHandler from changing state
m_serviceState = SERVICE_STOPPED;
// tell service control that the service is stopped.
// FIXME -- hopefully this will ensure that our handler won't
// be called again but i can't find documentation that
// verifies that. if it does it'll crash on the mutex that
// we're about to destroy.
setStatus(m_serviceState);
// clean up
if (m_daemonThread != NULL) {
ARCH->closeThread(m_daemonThread);
m_daemonThread = NULL;
}
ARCH->unlockMutex(m_serviceMutex);
return result;
}
catch (...) {
// FIXME -- report error
// prevent serviceHandler from changing state
m_serviceState = SERVICE_STOPPED;
// set status
setStatusError(0);
// wake up serviceHandler if it's waiting then wait for it
if (m_serviceHandlerWaiting) {
m_serviceHandlerWaiting = false;
ARCH->broadcastCondVar(m_serviceCondVar);
ARCH->waitCondVar(m_serviceCondVar, m_serviceMutex, -1.0);
// serviceHandler has exited by now
}
ARCH->unlockMutex(m_serviceMutex);
throw;
}
}
void
CArchDaemonWindows::doDaemonRunning(bool running)
{
if (running) {
ARCH->unlockMutex(m_serviceMutex);
}
else {
ARCH->lockMutex(m_serviceMutex);
}
}
void*
CArchDaemonWindows::runDaemonThread(RunFunc run)
{
return reinterpret_cast<void*>(run());
}
void*
CArchDaemonWindows::runDaemonThreadEntry(void* vrun)
{
assert(s_daemon != NULL);
return s_daemon->runDaemonThread(reinterpret_cast<RunFunc>(vrun));
}
void
CArchDaemonWindows::setStatus(DWORD state)
{
setStatus(state, 0, 0);
}
void
CArchDaemonWindows::setStatus(DWORD state, DWORD step, DWORD waitHint)
{
assert(s_daemon != NULL);
SERVICE_STATUS status;
status.dwServiceType = SERVICE_WIN32_OWN_PROCESS |
SERVICE_INTERACTIVE_PROCESS;
status.dwCurrentState = state;
status.dwControlsAccepted = SERVICE_ACCEPT_STOP |
SERVICE_ACCEPT_PAUSE_CONTINUE |
SERVICE_ACCEPT_SHUTDOWN;
status.dwWin32ExitCode = NO_ERROR;
status.dwServiceSpecificExitCode = 0;
status.dwCheckPoint = step;
status.dwWaitHint = waitHint;
SetServiceStatus(s_daemon->m_statusHandle, &status);
}
void
CArchDaemonWindows::setStatusError(DWORD error)
{
SERVICE_STATUS status;
status.dwServiceType = SERVICE_WIN32_OWN_PROCESS |
SERVICE_INTERACTIVE_PROCESS;
status.dwCurrentState = SERVICE_STOPPED;
status.dwControlsAccepted = SERVICE_ACCEPT_STOP |
SERVICE_ACCEPT_PAUSE_CONTINUE |
SERVICE_ACCEPT_SHUTDOWN;
status.dwWin32ExitCode = ERROR_SERVICE_SPECIFIC_ERROR;
status.dwServiceSpecificExitCode = error;
status.dwCheckPoint = 0;
status.dwWaitHint = 0;
SetServiceStatus(s_daemon->m_statusHandle, &status);
}
void
CArchDaemonWindows::serviceMain(DWORD argc, LPTSTR* argvIn)
{
typedef std::vector<LPCTSTR> ArgList;
typedef std::vector<std::string> Arguments;
const char** argv = const_cast<const char**>(argvIn);
// create synchronization objects
m_serviceMutex = ARCH->newMutex();
m_serviceCondVar = ARCH->newCondVar();
m_serviceState = SERVICE_RUNNING;
// register our service handler functiom
m_statusHandle = RegisterServiceCtrlHandler(argv[0],
&CArchDaemonWindows::serviceHandlerEntry);
if (m_statusHandle == NULL) {
// cannot start as service
m_daemonResult = -1;
ARCH->closeCondVar(m_serviceCondVar);
ARCH->closeMutex(m_serviceMutex);
return;
}
// tell service control manager that we're starting
setStatus(SERVICE_START_PENDING, 0, 10000);
// if no arguments supplied then try getting them from the registry.
// the first argument doesn't count because it's the service name.
Arguments args;
ArgList myArgv;
if (argc <= 1) {
// read command line
std::string commandLine;
HKEY key = openNTServicesKey();
key = CArchMiscWindows::openKey(key, argvIn[0]);
key = CArchMiscWindows::openKey(key, _T("Parameters"));
if (key != NULL) {
commandLine = CArchMiscWindows::readValueString(key,
_T("CommandLine"));
}
// if the command line isn't empty then parse and use it
if (!commandLine.empty()) {
// parse, honoring double quoted substrings
std::string::size_type i = commandLine.find_first_not_of(" \t");
while (i != std::string::npos && i != commandLine.size()) {
// find end of string
std::string::size_type e;
if (commandLine[i] == '\"') {
// quoted. find closing quote.
++i;
e = commandLine.find("\"", i);
// whitespace must follow closing quote
if (e == std::string::npos ||
(e + 1 != commandLine.size() &&
commandLine[e + 1] != ' ' &&
commandLine[e + 1] != '\t')) {
args.clear();
break;
}
// extract
args.push_back(commandLine.substr(i, e - i));
i = e + 1;
}
else {
// unquoted. find next whitespace.
e = commandLine.find_first_of(" \t", i);
if (e == std::string::npos) {
e = commandLine.size();
}
// extract
args.push_back(commandLine.substr(i, e - i));
i = e + 1;
}
// next argument
i = commandLine.find_first_not_of(" \t", i);
}
// service name goes first
myArgv.push_back(argv[0]);
// get pointers
for (size_t i = 0; i < args.size(); ++i) {
myArgv.push_back(args[i].c_str());
}
// adjust argc/argv
argc = myArgv.size();
argv = &myArgv[0];
}
}
try {
// invoke daemon function
m_daemonResult = m_daemonFunc(static_cast<int>(argc), argv);
}
catch (XArchDaemonRunFailed& e) {
setStatusError(e.m_result);
m_daemonResult = -1;
}
catch (...) {
setStatusError(1);
m_daemonResult = -1;
}
// clean up
ARCH->closeCondVar(m_serviceCondVar);
ARCH->closeMutex(m_serviceMutex);
}
void WINAPI
CArchDaemonWindows::serviceMainEntry(DWORD argc, LPTSTR* argv)
{
s_daemon->serviceMain(argc, argv);
}
void
CArchDaemonWindows::serviceHandler(DWORD ctrl)
{
assert(m_serviceMutex != NULL);
assert(m_serviceCondVar != NULL);
ARCH->lockMutex(m_serviceMutex);
// ignore request if service is already stopped
if (m_serviceState == SERVICE_STOPPED) {
setStatus(m_serviceState);
ARCH->unlockMutex(m_serviceMutex);
return;
}
switch (ctrl) {
case SERVICE_CONTROL_PAUSE:
// update state
m_serviceState = SERVICE_PAUSE_PENDING;
setStatus(m_serviceState, 0, 5000);
// stop run callback if running and wait for it to finish
if (m_serviceRunning) {
m_serviceHandlerWaiting = true;
ARCH->cancelThread(m_daemonThread);
ARCH->waitCondVar(m_serviceCondVar, m_serviceMutex, -1.0);
}
// update state if service hasn't stopped while we were waiting
if (m_serviceState != SERVICE_STOPPED) {
m_serviceState = SERVICE_PAUSED;
}
ARCH->broadcastCondVar(m_serviceCondVar);
break;
case SERVICE_CONTROL_CONTINUE:
// required status update
setStatus(m_serviceState);
// update state but let main loop send RUNNING notification
m_serviceState = SERVICE_RUNNING;
ARCH->broadcastCondVar(m_serviceCondVar);
ARCH->unlockMutex(m_serviceMutex);
return;
case SERVICE_CONTROL_STOP:
case SERVICE_CONTROL_SHUTDOWN:
// update state
m_serviceState = SERVICE_STOP_PENDING;
setStatus(m_serviceState, 0, 5000);
// stop run callback if running and wait for it to finish
if (m_serviceRunning) {
m_serviceHandlerWaiting = true;
ARCH->cancelThread(m_daemonThread);
ARCH->waitCondVar(m_serviceCondVar, m_serviceMutex, -1.0);
}
// update state
m_serviceState = SERVICE_STOPPED;
ARCH->broadcastCondVar(m_serviceCondVar);
break;
default:
// unknown service command
// fall through
case SERVICE_CONTROL_INTERROGATE:
break;
}
// send update
setStatus(m_serviceState);
ARCH->unlockMutex(m_serviceMutex);
}
void WINAPI
CArchDaemonWindows::serviceHandlerEntry(DWORD ctrl)
{
s_daemon->serviceHandler(ctrl);
}
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