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Java Native Access Platform
/* Copyright (c) 2010 EugineLev, All Rights Reserved
*
* The contents of this file is dual-licensed under 2
* alternative Open Source/Free licenses: LGPL 2.1 or later and
* Apache License 2.0. (starting with JNA version 4.0.0).
*
* You can freely decide which license you want to apply to
* the project.
*
* You may obtain a copy of the LGPL License at:
*
* http://www.gnu.org/licenses/licenses.html
*
* A copy is also included in the downloadable source code package
* containing JNA, in file "LGPL2.1".
*
* You may obtain a copy of the Apache License at:
*
* http://www.apache.org/licenses/
*
* A copy is also included in the downloadable source code package
* containing JNA, in file "AL2.0".
*/
package com.sun.jna.platform.win32;
import java.util.List;
import com.sun.jna.Memory;
import com.sun.jna.Pointer;
import com.sun.jna.Structure;
import com.sun.jna.platform.win32.WinDef.DWORD;
import com.sun.jna.platform.win32.WinNT.HANDLEByReference;
import com.sun.jna.platform.win32.WinNT.LUID;
import com.sun.jna.platform.win32.WinNT.LUID_AND_ATTRIBUTES;
import com.sun.jna.platform.win32.WinNT.TOKEN_PRIVILEGES;
import com.sun.jna.platform.win32.Winsvc.ENUM_SERVICE_STATUS;
import com.sun.jna.platform.win32.Winsvc.SC_ACTION;
import com.sun.jna.platform.win32.Winsvc.SC_HANDLE;
import com.sun.jna.platform.win32.Winsvc.SC_STATUS_TYPE;
import static com.sun.jna.platform.win32.Winsvc.SERVICE_CONTROL_STOP;
import com.sun.jna.platform.win32.Winsvc.SERVICE_FAILURE_ACTIONS;
import com.sun.jna.platform.win32.Winsvc.SERVICE_FAILURE_ACTIONS_FLAG;
import com.sun.jna.platform.win32.Winsvc.SERVICE_STATUS;
import com.sun.jna.platform.win32.Winsvc.SERVICE_STATUS_PROCESS;
import com.sun.jna.ptr.IntByReference;
import java.io.Closeable;
/**
* Win32 Service wrapper
* @author EugineLev
*/
public class W32Service implements Closeable {
SC_HANDLE _handle = null;
/**
* Win32 Service
*
* @param handle A handle to the service. This handle is returned by the
* CreateService or OpenService function, and it must have the
* SERVICE_QUERY_STATUS access right.
*/
public W32Service(SC_HANDLE handle) {
_handle = handle;
}
/**
* Close service.
*/
@Override
public void close() {
if (_handle != null) {
if (!Advapi32.INSTANCE.CloseServiceHandle(_handle)) {
throw new Win32Exception(Kernel32.INSTANCE.GetLastError());
}
_handle = null;
}
}
private void addShutdownPrivilegeToProcess() {
HANDLEByReference hToken = new HANDLEByReference();
LUID luid = new LUID();
Advapi32.INSTANCE.OpenProcessToken(Kernel32.INSTANCE.GetCurrentProcess(),
WinNT.TOKEN_ADJUST_PRIVILEGES, hToken);
Advapi32.INSTANCE.LookupPrivilegeValue("", WinNT.SE_SHUTDOWN_NAME, luid);
TOKEN_PRIVILEGES tp = new TOKEN_PRIVILEGES(1);
tp.Privileges[0] = new LUID_AND_ATTRIBUTES(luid, new DWORD(WinNT.SE_PRIVILEGE_ENABLED));
Advapi32.INSTANCE.AdjustTokenPrivileges(hToken.getValue(), false, tp, tp.size(), null,
new IntByReference());
}
/**
* Set the failure actions of the specified service. Corresponds to
* ChangeServiceConfig2
* with parameter dwInfoLevel set to SERVICE_CONFIG_FAILURE_ACTIONS.
*/
public void setFailureActions(List actions, int resetPeriod, String rebootMsg,
String command) {
SERVICE_FAILURE_ACTIONS.ByReference actionStruct = new SERVICE_FAILURE_ACTIONS.ByReference();
actionStruct.dwResetPeriod = resetPeriod;
actionStruct.lpRebootMsg = rebootMsg;
actionStruct.lpCommand = command;
actionStruct.cActions = actions.size();
actionStruct.lpsaActions = new SC_ACTION.ByReference();
SC_ACTION[] actionArray = (SC_ACTION[]) actionStruct.lpsaActions.toArray(actions.size());
boolean hasShutdownPrivilege = false;
int i = 0;
for (SC_ACTION action : actions) {
if (!hasShutdownPrivilege && action.type == Winsvc.SC_ACTION_REBOOT) {
addShutdownPrivilegeToProcess();
hasShutdownPrivilege = true;
}
actionArray[i].type = action.type;
actionArray[i].delay = action.delay;
i++;
}
if (!Advapi32.INSTANCE.ChangeServiceConfig2(_handle, Winsvc.SERVICE_CONFIG_FAILURE_ACTIONS,
actionStruct)) {
throw new Win32Exception(Kernel32.INSTANCE.GetLastError());
}
}
private Pointer queryServiceConfig2(int type) {
IntByReference bufferSize = new IntByReference();
Advapi32.INSTANCE.QueryServiceConfig2(_handle, type, Pointer.NULL, 0, bufferSize);
Pointer buffer = new Memory(bufferSize.getValue());
if (!Advapi32.INSTANCE.QueryServiceConfig2(_handle, type, buffer, bufferSize.getValue(),
new IntByReference())) {
throw new Win32Exception(Kernel32.INSTANCE.GetLastError());
}
return buffer;
}
/**
* Get the failure actions of the specified service. Corresponds to
* QueryServiceConfig2
* with parameter dwInfoLevel set to SERVICE_CONFIG_FAILURE_ACTIONS.
*/
public SERVICE_FAILURE_ACTIONS getFailureActions() {
Pointer buffer = queryServiceConfig2(Winsvc.SERVICE_CONFIG_FAILURE_ACTIONS);
SERVICE_FAILURE_ACTIONS result = new SERVICE_FAILURE_ACTIONS(buffer);
return result;
}
/**
* Set the failure action flag of the specified service. Corresponds to
* ChangeServiceConfig2
* with parameter dwInfoLevel set to SERVICE_CONFIG_FAILURE_ACTIONS_FLAG.
*/
public void setFailureActionsFlag(boolean flagValue) {
SERVICE_FAILURE_ACTIONS_FLAG flag = new SERVICE_FAILURE_ACTIONS_FLAG();
flag.fFailureActionsOnNonCrashFailures = flagValue ? 1 : 0;
if (!Advapi32.INSTANCE.ChangeServiceConfig2(_handle, Winsvc.SERVICE_CONFIG_FAILURE_ACTIONS_FLAG,
flag)) {
throw new Win32Exception(Kernel32.INSTANCE.GetLastError());
}
}
/**
* Get the failure actions flag of the specified service. Corresponds to
* QueryServiceConfig2
* with parameter dwInfoLevel set to SERVICE_CONFIG_FAILURE_ACTIONS_FLAG.
*/
public boolean getFailureActionsFlag() {
Pointer buffer = queryServiceConfig2(Winsvc.SERVICE_CONFIG_FAILURE_ACTIONS_FLAG);
SERVICE_FAILURE_ACTIONS_FLAG result = new SERVICE_FAILURE_ACTIONS_FLAG(buffer);
return result.fFailureActionsOnNonCrashFailures != 0;
}
/**
* Retrieves the current status of the specified service based on the
* specified information level.
*
* @return Service status information
*/
public SERVICE_STATUS_PROCESS queryStatus() {
IntByReference size = new IntByReference();
Advapi32.INSTANCE.QueryServiceStatusEx(_handle, SC_STATUS_TYPE.SC_STATUS_PROCESS_INFO,
null, 0, size);
SERVICE_STATUS_PROCESS status = new SERVICE_STATUS_PROCESS(size.getValue());
if (!Advapi32.INSTANCE.QueryServiceStatusEx(_handle, SC_STATUS_TYPE.SC_STATUS_PROCESS_INFO,
status, status.size(), size)) {
throw new Win32Exception(Kernel32.INSTANCE.GetLastError());
}
return status;
}
public void startService() {
waitForNonPendingState();
// If the service is already running - return
if (queryStatus().dwCurrentState == Winsvc.SERVICE_RUNNING) {
return;
}
if (!Advapi32.INSTANCE.StartService(_handle, 0, null)) {
throw new Win32Exception(Kernel32.INSTANCE.GetLastError());
}
waitForNonPendingState();
if (queryStatus().dwCurrentState != Winsvc.SERVICE_RUNNING) {
throw new RuntimeException("Unable to start the service");
}
}
/**
* Stop service.
*/
public void stopService() {
stopService(30000);
}
/**
* Stop service.
*
* @param timeout timeout in ms until the service must report to be stopped
*/
public void stopService(long timeout) {
long startTime = System.currentTimeMillis();
waitForNonPendingState();
// If the service is already stopped - return
if (queryStatus().dwCurrentState == Winsvc.SERVICE_STOPPED) {
return;
}
SERVICE_STATUS status = new SERVICE_STATUS();
if (!Advapi32.INSTANCE.ControlService(_handle, SERVICE_CONTROL_STOP, status)) {
throw new Win32Exception(Kernel32.INSTANCE.GetLastError());
}
// This following the sample from the MSDN
// the previouos implementation queried the service status and
// failed if the application did not correctly update its state
while (status.dwCurrentState != Winsvc.SERVICE_STOPPED) {
long msRemainingBeforeTimeout = timeout - (System.currentTimeMillis() - startTime);
if (msRemainingBeforeTimeout < 0) {
throw new RuntimeException(String.format("Service stop exceeded timeout time of %d ms", timeout));
}
long dwWaitTime = Math.min(sanitizeWaitTime(status.dwWaitHint), msRemainingBeforeTimeout);
try {
Thread.sleep(dwWaitTime);
} catch (InterruptedException e) {
throw new RuntimeException(e);
}
if (!Advapi32.INSTANCE.QueryServiceStatus(_handle, status)) {
throw new Win32Exception(Kernel32.INSTANCE.GetLastError());
}
}
}
/**
* Continue service.
*/
public void continueService() {
waitForNonPendingState();
// If the service is already stopped - return
if (queryStatus().dwCurrentState == Winsvc.SERVICE_RUNNING) {
return;
}
if (!Advapi32.INSTANCE.ControlService(_handle, Winsvc.SERVICE_CONTROL_CONTINUE,
new Winsvc.SERVICE_STATUS())) {
throw new Win32Exception(Kernel32.INSTANCE.GetLastError());
}
waitForNonPendingState();
if (queryStatus().dwCurrentState != Winsvc.SERVICE_RUNNING) {
throw new RuntimeException("Unable to continue the service");
}
}
/**
* Pause service.
*/
public void pauseService() {
waitForNonPendingState();
// If the service is already paused - return
if (queryStatus().dwCurrentState == Winsvc.SERVICE_PAUSED) {
return;
}
if (!Advapi32.INSTANCE.ControlService(_handle, Winsvc.SERVICE_CONTROL_PAUSE,
new Winsvc.SERVICE_STATUS())) {
throw new Win32Exception(Kernel32.INSTANCE.GetLastError());
}
waitForNonPendingState();
if (queryStatus().dwCurrentState != Winsvc.SERVICE_PAUSED) {
throw new RuntimeException("Unable to pause the service");
}
}
/**
* do not wait longer than the wait hint. A good interval is one-tenth the
* wait hint, but no less than 1 second and no more than 10 seconds.
*/
int sanitizeWaitTime(int dwWaitHint) {
int dwWaitTime = dwWaitHint / 10;
if (dwWaitTime < 1000) {
dwWaitTime = 1000;
} else if (dwWaitTime > 10000) {
dwWaitTime = 10000;
}
return dwWaitTime;
}
/**
* Wait for the state to change to something other than a pending state.
*/
public void waitForNonPendingState() {
SERVICE_STATUS_PROCESS status = queryStatus();
int previousCheckPoint = status.dwCheckPoint;
int checkpointStartTickCount = Kernel32.INSTANCE.GetTickCount();
while (isPendingState(status.dwCurrentState)) {
// if the checkpoint advanced, start new tick count
if (status.dwCheckPoint != previousCheckPoint) {
previousCheckPoint = status.dwCheckPoint;
checkpointStartTickCount = Kernel32.INSTANCE.GetTickCount();
}
// if the time that passed is greater than the wait hint - throw timeout exception
if (Kernel32.INSTANCE.GetTickCount() - checkpointStartTickCount > status.dwWaitHint) {
throw new RuntimeException("Timeout waiting for service to change to a non-pending state.");
}
int dwWaitTime = sanitizeWaitTime(status.dwWaitHint);
try {
Thread.sleep(dwWaitTime);
} catch (InterruptedException e) {
throw new RuntimeException(e);
}
status = queryStatus();
}
}
private boolean isPendingState(int state) {
switch (state) {
case Winsvc.SERVICE_CONTINUE_PENDING:
case Winsvc.SERVICE_STOP_PENDING:
case Winsvc.SERVICE_PAUSE_PENDING:
case Winsvc.SERVICE_START_PENDING:
return true;
default:
return false;
}
}
/**
* Gets the service handle.
*
* @return Returns the service handle.
*/
public SC_HANDLE getHandle() {
return _handle;
}
/**
* Retrieves the name and status of each service that depends on the
* specified service; that is, the specified service must be running before
* the dependent services can run.
*
* @param dwServiceState The state of the services to be enumerated. This
* parameter can be one of the following values.
*
* Value Meaning {@link Winsvc#SERVICE_ACTIVE} Enumerates services that
* are in the following states:
* {@link Winsvc#SERVICE_START_PENDING}, {@link Winsvc#SERVICE_STOP_PENDING}, {@link Winsvc#SERVICE_RUNNING}, {@link Winsvc#SERVICE_CONTINUE_PENDING}, {@link Winsvc#SERVICE_PAUSE_PENDING},
* and {@link Winsvc#SERVICE_PAUSED}. {@link Winsvc#SERVICE_INACTIVE} Enumerates services that
* are in the {@link Winsvc#SERVICE_STOPPED} state. {@link Winsvc#SERVICE_STATE_ALL} Combines the following
* states: {@link Winsvc#SERVICE_ACTIVE} and
* {@link Winsvc#SERVICE_INACTIVE}.
*
* @return array of ENUM_SERVICE_STATUS structures that receives the name
* and service status information for each dependent service in the
* database.
*/
public ENUM_SERVICE_STATUS[] enumDependentServices(int dwServiceState) {
IntByReference pcbBytesNeeded = new IntByReference(0);
IntByReference lpServicesReturned = new IntByReference(0);
Advapi32.INSTANCE.EnumDependentServices(_handle, dwServiceState, Pointer.NULL, 0, pcbBytesNeeded, lpServicesReturned);
int lastError = Kernel32.INSTANCE.GetLastError();
if (lastError != WinError.ERROR_MORE_DATA) {
throw new Win32Exception(lastError);
}
Memory buffer = new Memory(pcbBytesNeeded.getValue());
boolean result = Advapi32.INSTANCE.EnumDependentServices(_handle, dwServiceState, buffer, (int) buffer.size(), pcbBytesNeeded, lpServicesReturned);
if (!result) {
throw new Win32Exception(Kernel32.INSTANCE.GetLastError());
}
if (lpServicesReturned.getValue() == 0) {
return new ENUM_SERVICE_STATUS[0];
}
ENUM_SERVICE_STATUS status = Structure.newInstance(ENUM_SERVICE_STATUS.class, buffer);
status.read();
return (ENUM_SERVICE_STATUS[]) status.toArray(lpServicesReturned.getValue());
}
}
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