Allow specifying output streams.
[nssm.git] / service.cpp
index 1010666..21726df 100644 (file)
@@ -1,5 +1,6 @@
 #include "nssm.h"\r
 \r
+bool is_admin;\r
 SERVICE_STATUS service_status;\r
 SERVICE_STATUS_HANDLE service_handle;\r
 HANDLE process_handle;\r
@@ -10,8 +11,10 @@ char exe[EXE_LENGTH];
 char flags[CMD_LENGTH];\r
 char dir[MAX_PATH];\r
 bool stopping;\r
-CRITICAL_SECTION throttle_section;\r
-CONDITION_VARIABLE throttle_condition;\r
+unsigned long throttle_delay;\r
+HANDLE throttle_timer;\r
+LARGE_INTEGER throttle_duetime;\r
+FILETIME creation_time;\r
 \r
 static enum { NSSM_EXIT_RESTART, NSSM_EXIT_IGNORE, NSSM_EXIT_REALLY, NSSM_EXIT_UNCLEAN } exit_actions;\r
 static const char *exit_action_strings[] = { "Restart", "Ignore", "Exit", "Suicide", 0 };\r
@@ -28,7 +31,7 @@ static inline int throttle_milliseconds() {
 SC_HANDLE open_service_manager() {\r
   SC_HANDLE ret = OpenSCManager(0, SERVICES_ACTIVE_DATABASE, SC_MANAGER_ALL_ACCESS);\r
   if (! ret) {\r
-    log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_OPENSCMANAGER_FAILED, 0);\r
+    if (is_admin) log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_OPENSCMANAGER_FAILED, 0);\r
     return 0;\r
   }\r
 \r
@@ -37,13 +40,36 @@ SC_HANDLE open_service_manager() {
 \r
 /* About to install the service */\r
 int pre_install_service(int argc, char **argv) {\r
-  /* Show the dialogue box if we didn't give the */\r
+  /* Show the dialogue box if we didn't give the service name and path */\r
   if (argc < 2) return nssm_gui(IDD_INSTALL, argv[0]);\r
 \r
   /* Arguments are optional */\r
   char *flags;\r
-  if (argc == 2) flags = "";\r
-  else flags = argv[2];\r
+  size_t flagslen = 0;\r
+  size_t s = 0;\r
+  int i;\r
+  for (i = 2; i < argc; i++) flagslen += strlen(argv[i]) + 1;\r
+  if (! flagslen) flagslen = 1;\r
+\r
+  flags = (char *) HeapAlloc(GetProcessHeap(), 0, flagslen);\r
+  if (! flags) {\r
+    log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_OUT_OF_MEMORY, "flags", "pre_install_service()", 0);\r
+    return 2;\r
+  }\r
+  ZeroMemory(flags, flagslen);\r
+\r
+  /*\r
+    This probably isn't UTF8-safe and should use std::string or something\r
+    but it's been broken for the best part of a decade and due for a rewrite\r
+    anyway so it'll do as a quick-'n'-dirty fix.  Note that we don't free\r
+    the flags buffer but as the program exits that isn't a big problem.\r
+  */\r
+  for (i = 2; i < argc; i++) {\r
+    size_t len = strlen(argv[i]);\r
+    memmove(flags + s, argv[i], len);\r
+    s += len;\r
+    if (i < argc - 1) flags[s++] = ' ';\r
+  }\r
 \r
   return install_service(argv[0], argv[1], flags);\r
 }\r
@@ -53,7 +79,7 @@ int pre_remove_service(int argc, char **argv) {
   /* Show dialogue box if we didn't pass service name and "confirm" */\r
   if (argc < 2) return nssm_gui(IDD_REMOVE, argv[0]);\r
   if (str_equiv(argv[1], "confirm")) return remove_service(argv[0]);\r
-  fprintf(stderr, "To remove a service without confirmation: nssm remove <servicename> confirm\n");\r
+  print_message(stderr, NSSM_MESSAGE_PRE_REMOVE_SERVICE);\r
   return 100;\r
 }\r
 \r
@@ -62,24 +88,23 @@ int install_service(char *name, char *exe, char *flags) {
   /* Open service manager */\r
   SC_HANDLE services = open_service_manager();\r
   if (! services) {\r
-    fprintf(stderr, "Error opening service manager!\n");\r
+    print_message(stderr, NSSM_MESSAGE_OPEN_SERVICE_MANAGER_FAILED);\r
     return 2;\r
   }\r
-  \r
+\r
   /* Get path of this program */\r
   char path[MAX_PATH];\r
   GetModuleFileName(0, path, MAX_PATH);\r
 \r
   /* Construct command */\r
   char command[CMD_LENGTH];\r
-  size_t runlen = strlen(NSSM_RUN);\r
   size_t pathlen = strlen(path);\r
-  if (pathlen + runlen + 2 >= VALUE_LENGTH) {\r
-    fprintf(stderr, "The full path to " NSSM " is too long!\n");\r
+  if (pathlen + 1 >= VALUE_LENGTH) {\r
+    print_message(stderr, NSSM_MESSAGE_PATH_TOO_LONG, NSSM);\r
     return 3;\r
   }\r
-  if (snprintf(command, sizeof(command), "\"%s\" %s", path, NSSM_RUN) < 0) {\r
-    fprintf(stderr, "Out of memory for ImagePath!\n");\r
+  if (_snprintf(command, sizeof(command), "\"%s\"", path) < 0) {\r
+    print_message(stderr, NSSM_MESSAGE_OUT_OF_MEMORY_FOR_IMAGEPATH);\r
     return 4;\r
   }\r
 \r
@@ -94,24 +119,26 @@ int install_service(char *name, char *exe, char *flags) {
   /* Create the service */\r
   SC_HANDLE service = CreateService(services, name, name, SC_MANAGER_ALL_ACCESS, SERVICE_WIN32_OWN_PROCESS, SERVICE_AUTO_START, SERVICE_ERROR_NORMAL, command, 0, 0, 0, 0, 0);\r
   if (! service) {\r
-    fprintf(stderr, "Error creating service!\n");\r
+    print_message(stderr, NSSM_MESSAGE_CREATESERVICE_FAILED);\r
     CloseServiceHandle(services);\r
     return 5;\r
   }\r
 \r
   /* Now we need to put the parameters into the registry */\r
   if (create_parameters(name, exe, flags, dir)) {\r
-    fprintf(stderr, "Error setting startup parameters for the service!\n");\r
+    print_message(stderr, NSSM_MESSAGE_CREATE_PARAMETERS_FAILED);\r
     DeleteService(service);\r
     CloseServiceHandle(services);\r
     return 6;\r
   }\r
 \r
+  set_service_recovery(service, name);\r
+\r
   /* Cleanup */\r
   CloseServiceHandle(service);\r
   CloseServiceHandle(services);\r
 \r
-  printf("Service \"%s\" installed successfully!\n", name);\r
+  print_message(stdout, NSSM_MESSAGE_SERVICE_INSTALLED, name);\r
   return 0;\r
 }\r
 \r
@@ -120,21 +147,21 @@ int remove_service(char *name) {
   /* Open service manager */\r
   SC_HANDLE services = open_service_manager();\r
   if (! services) {\r
-    fprintf(stderr, "Error opening service manager!\n");\r
+    print_message(stderr, NSSM_MESSAGE_OPEN_SERVICE_MANAGER_FAILED);\r
     return 2;\r
   }\r
-  \r
+\r
   /* Try to open the service */\r
   SC_HANDLE service = OpenService(services, name, SC_MANAGER_ALL_ACCESS);\r
   if (! service) {\r
-    fprintf(stderr, "Can't open service!");\r
+    print_message(stderr, NSSM_MESSAGE_OPENSERVICE_FAILED);\r
     CloseServiceHandle(services);\r
     return 3;\r
   }\r
 \r
   /* Try to delete the service */\r
   if (! DeleteService(service)) {\r
-    fprintf(stderr, "Error deleting service!\n");\r
+    print_message(stderr, NSSM_MESSAGE_DELETESERVICE_FAILED);\r
     CloseServiceHandle(service);\r
     CloseServiceHandle(services);\r
     return 4;\r
@@ -144,7 +171,7 @@ int remove_service(char *name) {
   CloseServiceHandle(service);\r
   CloseServiceHandle(services);\r
 \r
-  printf("Service \"%s\" removed successfully!\n", name);\r
+  print_message(stdout, NSSM_MESSAGE_SERVICE_REMOVED, name);\r
   return 0;\r
 }\r
 \r
@@ -171,51 +198,61 @@ void WINAPI service_main(unsigned long argc, char **argv) {
   /* Register control handler */\r
   service_handle = RegisterServiceCtrlHandlerEx(NSSM, service_control_handler, 0);\r
   if (! service_handle) {\r
-    log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_REGISTERSERVICECTRLHANDER_FAILED, GetLastError(), 0);\r
+    log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_REGISTERSERVICECTRLHANDER_FAILED, error_string(GetLastError()), 0);\r
     return;\r
   }\r
 \r
-  /* Get startup parameters */\r
-  int ret = get_parameters(argv[0], exe, sizeof(exe), flags, sizeof(flags), dir, sizeof(dir));\r
-  if (ret) {\r
-    log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_GET_PARAMETERS_FAILED, argv[0], 0);\r
-    service_status.dwCurrentState = SERVICE_STOPPED;\r
-    /* An accurate, if not particularly helpful, status */\r
-    service_status.dwWin32ExitCode = ERROR_SERVICE_NOT_ACTIVE;\r
-    SetServiceStatus(service_handle, &service_status);\r
-    return;\r
-  }\r
+  log_service_control(service_name, 0, true);\r
 \r
   service_status.dwCurrentState = SERVICE_START_PENDING;\r
-  service_status.dwWaitHint = NSSM_RESET_THROTTLE_RESTART + NSSM_WAITHINT_MARGIN;\r
+  service_status.dwWaitHint = throttle_delay + NSSM_WAITHINT_MARGIN;\r
   SetServiceStatus(service_handle, &service_status);\r
 \r
-  /* Try to create the exit action parameters; we don't care if it fails */\r
-  create_exit_action(argv[0], exit_action_strings[0]);\r
+  if (is_admin) {\r
+    /* Try to create the exit action parameters; we don't care if it fails */\r
+    create_exit_action(argv[0], exit_action_strings[0]);\r
 \r
-  set_service_recovery(service_name);\r
+    set_service_recovery(0, service_name);\r
+  }\r
 \r
   /* Used for signalling a resume if the service pauses when throttled. */\r
-  InitializeCriticalSection(&throttle_section);\r
+  throttle_timer = CreateWaitableTimer(0, 1, 0);\r
+  if (! throttle_timer) {\r
+    log_event(EVENTLOG_WARNING_TYPE, NSSM_EVENT_CREATEWAITABLETIMER_FAILED, service_name, error_string(GetLastError()), 0);\r
+  }\r
 \r
   monitor_service();\r
 }\r
 \r
 /* Make sure service recovery actions are taken where necessary */\r
-void set_service_recovery(char *service_name) {\r
-  SC_HANDLE services = open_service_manager();\r
-  if (! services) return;\r
+void set_service_recovery(SC_HANDLE service, char *service_name) {\r
+  SC_HANDLE services = 0;\r
+\r
+  if (! service) {\r
+    services = open_service_manager();\r
+    if (! services) return;\r
 \r
-  SC_HANDLE service = OpenService(services, service_name, SC_MANAGER_ALL_ACCESS);\r
-  if (! service) return;\r
-  return;\r
+    service = OpenService(services, service_name, SC_MANAGER_ALL_ACCESS);\r
+    if (! service) return;\r
+  }\r
 \r
   SERVICE_FAILURE_ACTIONS_FLAG flag;\r
   ZeroMemory(&flag, sizeof(flag));\r
   flag.fFailureActionsOnNonCrashFailures = true;\r
 \r
   /* This functionality was added in Vista so the call may fail */\r
-  ChangeServiceConfig2(service, SERVICE_CONFIG_FAILURE_ACTIONS_FLAG, &flag);\r
+  if (! ChangeServiceConfig2(service, SERVICE_CONFIG_FAILURE_ACTIONS_FLAG, &flag)) {\r
+    unsigned long error = GetLastError();\r
+    /* Pre-Vista we expect to fail with ERROR_INVALID_LEVEL */\r
+    if (error != ERROR_INVALID_LEVEL) {\r
+      log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_CHANGESERVICECONFIG2_FAILED, service_name, error_string(error), 0);\r
+    }\r
+  }\r
+\r
+  if (services) {\r
+    CloseServiceHandle(service);\r
+    CloseServiceHandle(services);\r
+  }\r
 }\r
 \r
 int monitor_service() {\r
@@ -223,7 +260,7 @@ int monitor_service() {
   int ret = start_service();\r
   if (ret) {\r
     char code[16];\r
-    snprintf(code, sizeof(code), "%d", ret);\r
+    _snprintf(code, sizeof(code), "%d", ret);\r
     log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_START_SERVICE_FAILED, exe, service_name, ret, 0);\r
     return ret;\r
   }\r
@@ -231,23 +268,73 @@ int monitor_service() {
 \r
   /* Monitor service service */\r
   if (! RegisterWaitForSingleObject(&wait_handle, process_handle, end_service, (void *) pid, INFINITE, WT_EXECUTEONLYONCE | WT_EXECUTELONGFUNCTION)) {\r
-    log_event(EVENTLOG_WARNING_TYPE, NSSM_EVENT_REGISTERWAITFORSINGLEOBJECT_FAILED, service_name, exe, GetLastError(), 0);\r
+    log_event(EVENTLOG_WARNING_TYPE, NSSM_EVENT_REGISTERWAITFORSINGLEOBJECT_FAILED, service_name, exe, error_string(GetLastError()), 0);\r
   }\r
 \r
   return 0;\r
 }\r
 \r
+char *service_control_text(unsigned long control) {\r
+  switch (control) {\r
+    /* HACK: there is no SERVICE_CONTROL_START constant */\r
+    case 0: return "START";\r
+    case SERVICE_CONTROL_STOP: return "STOP";\r
+    case SERVICE_CONTROL_SHUTDOWN: return "SHUTDOWN";\r
+    case SERVICE_CONTROL_PAUSE: return "PAUSE";\r
+    case SERVICE_CONTROL_CONTINUE: return "CONTINUE";\r
+    case SERVICE_CONTROL_INTERROGATE: return "INTERROGATE";\r
+    default: return 0;\r
+  }\r
+}\r
+\r
+void log_service_control(char *service_name, unsigned long control, bool handled) {\r
+  char *text = service_control_text(control);\r
+  unsigned long event;\r
+\r
+  if (! text) {\r
+    /* "0x" + 8 x hex + NULL */\r
+    text = (char *) HeapAlloc(GetProcessHeap(), 0, 11);\r
+    if (! text) {\r
+      log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_OUT_OF_MEMORY, "control code", "log_service_control", 0);\r
+      return;\r
+    }\r
+    if (_snprintf(text, 11, "0x%08x", control) < 0) {\r
+      log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_OUT_OF_MEMORY, "control code", "log_service_control", 0);\r
+      HeapFree(GetProcessHeap(), 0, text);\r
+      return;\r
+    }\r
+\r
+    event = NSSM_EVENT_SERVICE_CONTROL_UNKNOWN;\r
+  }\r
+  else if (handled) event = NSSM_EVENT_SERVICE_CONTROL_HANDLED;\r
+  else event = NSSM_EVENT_SERVICE_CONTROL_NOT_HANDLED;\r
+\r
+  log_event(EVENTLOG_INFORMATION_TYPE, event, service_name, text, 0);\r
+\r
+  if (event == NSSM_EVENT_SERVICE_CONTROL_UNKNOWN) {\r
+    HeapFree(GetProcessHeap(), 0, text);\r
+  }\r
+}\r
+\r
 /* Service control handler */\r
 unsigned long WINAPI service_control_handler(unsigned long control, unsigned long event, void *data, void *context) {\r
   switch (control) {\r
+    case SERVICE_CONTROL_INTERROGATE:\r
+      /* We always keep the service status up-to-date so this is a no-op. */\r
+      return NO_ERROR;\r
+\r
     case SERVICE_CONTROL_SHUTDOWN:\r
     case SERVICE_CONTROL_STOP:\r
+      log_service_control(service_name, control, true);\r
       stop_service(0, true, true);\r
       return NO_ERROR;\r
 \r
     case SERVICE_CONTROL_CONTINUE:\r
+      log_service_control(service_name, control, true);\r
+      if (! throttle_timer) return ERROR_CALL_NOT_IMPLEMENTED;\r
       throttle = 0;\r
-      WakeConditionVariable(&throttle_condition);\r
+      ZeroMemory(&throttle_duetime, sizeof(throttle_duetime));\r
+      SetWaitableTimer(throttle_timer, &throttle_duetime, 0, 0, 0, 0);\r
       service_status.dwCurrentState = SERVICE_CONTINUE_PENDING;\r
       service_status.dwWaitHint = throttle_milliseconds() + NSSM_WAITHINT_MARGIN;\r
       log_event(EVENTLOG_INFORMATION_TYPE, NSSM_EVENT_RESET_THROTTLE, service_name, 0);\r
@@ -259,10 +346,12 @@ unsigned long WINAPI service_control_handler(unsigned long control, unsigned lon
         We don't accept pause messages but it isn't possible to register\r
         only for continue messages so we have to handle this case.\r
       */\r
+      log_service_control(service_name, control, false);\r
       return ERROR_CALL_NOT_IMPLEMENTED;\r
   }\r
 \r
   /* Unknown control */\r
+  log_service_control(service_name, control, false);\r
   return ERROR_CALL_NOT_IMPLEMENTED;\r
 }\r
 \r
@@ -281,28 +370,45 @@ int start_service() {
   PROCESS_INFORMATION pi;\r
   ZeroMemory(&pi, sizeof(pi));\r
 \r
+  /* Get startup parameters */\r
+  char *env = 0;\r
+  int ret = get_parameters(service_name, exe, sizeof(exe), flags, sizeof(flags), dir, sizeof(dir), &env, &throttle_delay, &si);\r
+  if (ret) {\r
+    log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_GET_PARAMETERS_FAILED, service_name, 0);\r
+    return stop_service(2, true, true);\r
+  }\r
+\r
   /* Launch executable with arguments */\r
   char cmd[CMD_LENGTH];\r
-  if (_snprintf(cmd, sizeof(cmd), "%s %s", exe, flags) < 0) {\r
+  if (_snprintf(cmd, sizeof(cmd), "\"%s\" %s", exe, flags) < 0) {\r
     log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_OUT_OF_MEMORY, "command line", "start_service", 0);\r
+    close_output_handles(&si);\r
     return stop_service(2, true, true);\r
   }\r
 \r
   throttle_restart();\r
 \r
-  if (! CreateProcess(0, cmd, 0, 0, false, 0, 0, dir, &si, &pi)) {\r
-    log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_CREATEPROCESS_FAILED, service_name, exe, GetLastError(), 0);\r
+  bool inherit_handles = (si.dwFlags & STARTF_USESTDHANDLES);\r
+  if (! CreateProcess(0, cmd, 0, 0, inherit_handles, 0, env, dir, &si, &pi)) {\r
+    unsigned long error = GetLastError();\r
+    if (error == ERROR_INVALID_PARAMETER && env) log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_CREATEPROCESS_FAILED_INVALID_ENVIRONMENT, service_name, exe, NSSM_REG_ENV, 0);\r
+    else log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_CREATEPROCESS_FAILED, service_name, exe, error_string(error), 0);\r
+    close_output_handles(&si);\r
     return stop_service(3, true, true);\r
   }\r
   process_handle = pi.hProcess;\r
   pid = pi.dwProcessId;\r
 \r
+  if (get_process_creation_time(process_handle, &creation_time)) ZeroMemory(&creation_time, sizeof(creation_time));\r
+\r
+  close_output_handles(&si);\r
+\r
   /* Signal successful start */\r
   service_status.dwCurrentState = SERVICE_RUNNING;\r
   SetServiceStatus(service_handle, &service_status);\r
 \r
   /* Wait for a clean startup. */\r
-  if (WaitForSingleObject(process_handle, NSSM_RESET_THROTTLE_RESTART) == WAIT_TIMEOUT) throttle = 0;\r
+  if (WaitForSingleObject(process_handle, throttle_delay) == WAIT_TIMEOUT) throttle = 0;\r
 \r
   return 0;\r
 }\r
@@ -321,12 +427,11 @@ int stop_service(unsigned long exitcode, bool graceful, bool default_action) {
     SetServiceStatus(service_handle, &service_status);\r
   }\r
 \r
-  /* Nothing to do if server isn't running */\r
+  /* Nothing to do if service isn't running */\r
   if (pid) {\r
-    /* Shut down server */\r
+    /* Shut down service */\r
     log_event(EVENTLOG_INFORMATION_TYPE, NSSM_EVENT_TERMINATEPROCESS, service_name, exe, 0);\r
     kill_process(service_name, process_handle, pid, 0);\r
-    process_handle = 0;\r
   }\r
   else log_event(EVENTLOG_INFORMATION_TYPE, NSSM_EVENT_PROCESS_ALREADY_STOPPED, service_name, exe, 0);\r
 \r
@@ -359,10 +464,23 @@ void CALLBACK end_service(void *arg, unsigned char why) {
 \r
   /* Check exit code */\r
   unsigned long exitcode = 0;\r
+  char code[16];\r
+  FILETIME exit_time;\r
   GetExitCodeProcess(process_handle, &exitcode);\r
+  if (exitcode == STILL_ACTIVE || get_process_exit_time(process_handle, &exit_time)) GetSystemTimeAsFileTime(&exit_time);\r
+  CloseHandle(process_handle);\r
+\r
+  /*\r
+    Log that the service ended BEFORE logging about killing the process\r
+    tree.  See below for the possible values of the why argument.\r
+  */\r
+  if (! why) {\r
+    _snprintf(code, sizeof(code), "%d", exitcode);\r
+    log_event(EVENTLOG_INFORMATION_TYPE, NSSM_EVENT_ENDED_SERVICE, exe, service_name, code, 0);\r
+  }\r
 \r
   /* Clean up. */\r
-  kill_process_tree(service_name, pid, exitcode, pid);\r
+  kill_process_tree(service_name, pid, exitcode, pid, &creation_time, &exit_time);\r
 \r
   /*\r
     The why argument is true if our wait timed out or false otherwise.\r
@@ -372,10 +490,6 @@ void CALLBACK end_service(void *arg, unsigned char why) {
   */\r
   if (why) return;\r
 \r
-  char code[16];\r
-  _snprintf(code, sizeof(code), "%d", exitcode);\r
-  log_event(EVENTLOG_INFORMATION_TYPE, NSSM_EVENT_ENDED_SERVICE, exe, service_name, code, 0);\r
-\r
   /* What action should we take? */\r
   int action = NSSM_EXIT_RESTART;\r
   unsigned char action_string[ACTION_LEN];\r
@@ -430,16 +544,19 @@ void throttle_restart() {
   if (throttle > 7) throttle = 8;\r
 \r
   char threshold[8], milliseconds[8];\r
-  _snprintf(threshold, sizeof(threshold), "%d", NSSM_RESET_THROTTLE_RESTART);\r
+  _snprintf(threshold, sizeof(threshold), "%d", throttle_delay);\r
   _snprintf(milliseconds, sizeof(milliseconds), "%d", ms);\r
   log_event(EVENTLOG_WARNING_TYPE, NSSM_EVENT_THROTTLED, service_name, threshold, milliseconds, 0);\r
 \r
-  EnterCriticalSection(&throttle_section);\r
+  if (throttle_timer) {\r
+    ZeroMemory(&throttle_duetime, sizeof(throttle_duetime));\r
+    throttle_duetime.QuadPart = 0 - (ms * 10000LL);\r
+    SetWaitableTimer(throttle_timer, &throttle_duetime, 0, 0, 0, 0);\r
+  }\r
 \r
   service_status.dwCurrentState = SERVICE_PAUSED;\r
   SetServiceStatus(service_handle, &service_status);\r
 \r
-  SleepConditionVariableCS(&throttle_condition, &throttle_section, ms);\r
-\r
-  LeaveCriticalSection(&throttle_section);\r
+  if (throttle_timer) WaitForSingleObject(throttle_timer, INFINITE);\r
+  else Sleep(ms);\r
 }\r