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windows: add SubscribeServiceChangeNotifications for service tracking

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Windows 8+ introduced SubscribeServiceChangeNotifications for simpler
and more reliable service event tracking. This commit adds the function
and related constants:

https://docs.microsoft.com/en-us/windows/win32/services/subscribeservicechangenotifications

Since these functions are only available on Windows 8+, and Go supports
Windows 7+, we mark them with "?" so that the caller can handle graceful
degradation.

Change-Id: Ibb9708bbe797408701c70b4b1c715381f33cb8ee
Reviewed-on: https://go-review.googlesource.com/c/sys/+/274576
Run-TryBot: Jason A. Donenfeld <Jason@zx2c4.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Alex Brainman <alex.brainman@gmail.com>
Trust: Alex Brainman <alex.brainman@gmail.com>
Trust: Jason A. Donenfeld <Jason@zx2c4.com>
This commit is contained in:
Jason A. Donenfeld
2020-12-04 22:54:10 +00:00
parent 9a0d5dbcff
commit c9906e3070
2 changed files with 30 additions and 0 deletions
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windows/service.go
+6
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@@ -128,6 +128,10 @@ const (
SERVICE_NOTIFY_CREATED = 0x00000080
SERVICE_NOTIFY_DELETED = 0x00000100
SERVICE_NOTIFY_DELETE_PENDING = 0x00000200
SC_EVENT_DATABASE_CHANGE = 0
SC_EVENT_PROPERTY_CHANGE = 1
SC_EVENT_STATUS_CHANGE = 2
)
type SERVICE_STATUS struct {
@@ -229,3 +233,5 @@ type QUERY_SERVICE_LOCK_STATUS struct {
//sys EnumServicesStatusEx(mgr Handle, infoLevel uint32, serviceType uint32, serviceState uint32, services *byte, bufSize uint32, bytesNeeded *uint32, servicesReturned *uint32, resumeHandle *uint32, groupName *uint16) (err error) = advapi32.EnumServicesStatusExW
//sys QueryServiceStatusEx(service Handle, infoLevel uint32, buff *byte, buffSize uint32, bytesNeeded *uint32) (err error) = advapi32.QueryServiceStatusEx
//sys NotifyServiceStatusChange(service Handle, notifyMask uint32, notifier *SERVICE_NOTIFY) (ret error) = advapi32.NotifyServiceStatusChangeW
//sys SubscribeServiceChangeNotifications(service Handle, eventType uint32, callback uintptr, callbackCtx uintptr, subscription *uintptr) (ret error) = sechost.SubscribeServiceChangeNotifications?
//sys UnsubscribeServiceChangeNotifications(subscription uintptr) = sechost.UnsubscribeServiceChangeNotifications?