windows/svc/mgr: add Mgr.ListServices
Add API to list services installed on the system.
Fixes golang/go#20596
Change-Id: Ifa2f20ef15ccb962bd21d03788ce931dd45f2630
Reviewed-on: https://go-review.googlesource.com/45711
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
diff --git a/windows/service.go b/windows/service.go
index 1c11d39..a500dd7 100644
--- a/windows/service.go
+++ b/windows/service.go
@@ -95,6 +95,8 @@
SERVICE_CONFIG_FAILURE_ACTIONS = 2
NO_ERROR = 0
+
+ SC_ENUM_PROCESS_INFO = 0
)
type SERVICE_STATUS struct {
@@ -128,6 +130,24 @@
Description *uint16
}
+type SERVICE_STATUS_PROCESS struct {
+ ServiceType uint32
+ CurrentState uint32
+ ControlsAccepted uint32
+ Win32ExitCode uint32
+ ServiceSpecificExitCode uint32
+ CheckPoint uint32
+ WaitHint uint32
+ ProcessId uint32
+ ServiceFlags uint32
+}
+
+type ENUM_SERVICE_STATUS_PROCESS struct {
+ ServiceName *uint16
+ DisplayName *uint16
+ ServiceStatusProcess SERVICE_STATUS_PROCESS
+}
+
//sys CloseServiceHandle(handle Handle) (err error) = advapi32.CloseServiceHandle
//sys CreateService(mgr Handle, serviceName *uint16, displayName *uint16, access uint32, srvType uint32, startType uint32, errCtl uint32, pathName *uint16, loadOrderGroup *uint16, tagId *uint32, dependencies *uint16, serviceStartName *uint16, password *uint16) (handle Handle, err error) [failretval==0] = advapi32.CreateServiceW
//sys OpenService(mgr Handle, serviceName *uint16, access uint32) (handle Handle, err error) [failretval==0] = advapi32.OpenServiceW
@@ -141,3 +161,4 @@
//sys QueryServiceConfig(service Handle, serviceConfig *QUERY_SERVICE_CONFIG, bufSize uint32, bytesNeeded *uint32) (err error) = advapi32.QueryServiceConfigW
//sys ChangeServiceConfig2(service Handle, infoLevel uint32, info *byte) (err error) = advapi32.ChangeServiceConfig2W
//sys QueryServiceConfig2(service Handle, infoLevel uint32, buff *byte, buffSize uint32, bytesNeeded *uint32) (err error) = advapi32.QueryServiceConfig2W
+//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
diff --git a/windows/svc/mgr/mgr.go b/windows/svc/mgr/mgr.go
index e20a1fa..76965b5 100644
--- a/windows/svc/mgr/mgr.go
+++ b/windows/svc/mgr/mgr.go
@@ -14,6 +14,7 @@
import (
"syscall"
"unicode/utf16"
+ "unsafe"
"golang.org/x/sys/windows"
)
@@ -119,3 +120,43 @@
}
return &Service{Name: name, Handle: h}, nil
}
+
+// ListServices enumerates services in the specified
+// service control manager database m.
+// If the caller does not have the SERVICE_QUERY_STATUS
+// access right to a service, the service is silently
+// omitted from the list of services returned.
+func (m *Mgr) ListServices() ([]string, error) {
+ var err error
+ var bytesNeeded, servicesReturned uint32
+ var buf []byte
+ for {
+ var p *byte
+ if len(buf) > 0 {
+ p = &buf[0]
+ }
+ err = windows.EnumServicesStatusEx(m.Handle, windows.SC_ENUM_PROCESS_INFO,
+ windows.SERVICE_WIN32, windows.SERVICE_STATE_ALL,
+ p, uint32(len(buf)), &bytesNeeded, &servicesReturned, nil, nil)
+ if err == nil {
+ break
+ }
+ if err != syscall.ERROR_MORE_DATA {
+ return nil, err
+ }
+ if bytesNeeded <= uint32(len(buf)) {
+ return nil, err
+ }
+ buf = make([]byte, bytesNeeded)
+ }
+ if servicesReturned == 0 {
+ return nil, nil
+ }
+ services := (*[1 << 20]windows.ENUM_SERVICE_STATUS_PROCESS)(unsafe.Pointer(&buf[0]))[:servicesReturned]
+ var names []string
+ for _, s := range services {
+ name := syscall.UTF16ToString((*[1 << 20]uint16)(unsafe.Pointer(s.ServiceName))[:])
+ names = append(names, name)
+ }
+ return names, nil
+}
diff --git a/windows/svc/mgr/mgr_test.go b/windows/svc/mgr/mgr_test.go
index 78be970..e67407c 100644
--- a/windows/svc/mgr/mgr_test.go
+++ b/windows/svc/mgr/mgr_test.go
@@ -150,5 +150,20 @@
testConfig(t, s, c)
+ svcnames, err := m.ListServices()
+ if err != nil {
+ t.Fatalf("ListServices failed: %v", err)
+ }
+ var myserviceIsInstalled bool
+ for _, sn := range svcnames {
+ if sn == name {
+ myserviceIsInstalled = true
+ break
+ }
+ }
+ if !myserviceIsInstalled {
+ t.Errorf("ListServices failed to find %q service", name)
+ }
+
remove(t, s)
}
diff --git a/windows/svc/mgr/service.go b/windows/svc/mgr/service.go
index ac9fba5..fdc46af 100644
--- a/windows/svc/mgr/service.go
+++ b/windows/svc/mgr/service.go
@@ -15,8 +15,6 @@
// TODO(brainman): Use EnumDependentServices to enumerate dependent services.
-// TODO(brainman): Use EnumServicesStatus to enumerate services in the specified service control manager database.
-
// Service is used to access Windows service.
type Service struct {
Name string
diff --git a/windows/zsyscall_windows.go b/windows/zsyscall_windows.go
index f7bc8d6..b9ee827 100644
--- a/windows/zsyscall_windows.go
+++ b/windows/zsyscall_windows.go
@@ -64,6 +64,7 @@
procQueryServiceConfigW = modadvapi32.NewProc("QueryServiceConfigW")
procChangeServiceConfig2W = modadvapi32.NewProc("ChangeServiceConfig2W")
procQueryServiceConfig2W = modadvapi32.NewProc("QueryServiceConfig2W")
+ procEnumServicesStatusExW = modadvapi32.NewProc("EnumServicesStatusExW")
procGetLastError = modkernel32.NewProc("GetLastError")
procLoadLibraryW = modkernel32.NewProc("LoadLibraryW")
procLoadLibraryExW = modkernel32.NewProc("LoadLibraryExW")
@@ -430,6 +431,18 @@
return
}
+func EnumServicesStatusEx(mgr Handle, infoLevel uint32, serviceType uint32, serviceState uint32, services *byte, bufSize uint32, bytesNeeded *uint32, servicesReturned *uint32, resumeHandle *uint32, groupName *uint16) (err error) {
+ r1, _, e1 := syscall.Syscall12(procEnumServicesStatusExW.Addr(), 10, uintptr(mgr), uintptr(infoLevel), uintptr(serviceType), uintptr(serviceState), uintptr(unsafe.Pointer(services)), uintptr(bufSize), uintptr(unsafe.Pointer(bytesNeeded)), uintptr(unsafe.Pointer(servicesReturned)), uintptr(unsafe.Pointer(resumeHandle)), uintptr(unsafe.Pointer(groupName)), 0, 0)
+ if r1 == 0 {
+ if e1 != 0 {
+ err = errnoErr(e1)
+ } else {
+ err = syscall.EINVAL
+ }
+ }
+ return
+}
+
func GetLastError() (lasterr error) {
r0, _, _ := syscall.Syscall(procGetLastError.Addr(), 0, 0, 0, 0)
if r0 != 0 {
