+/*\r
+ Check the status in response to a control.\r
+ Returns: 1 if the status is expected, eg STOP following CONTROL_STOP.\r
+ 0 if the status is desired, eg STOPPED following CONTROL_STOP.\r
+ -1 if the status is undesired, eg STOPPED following CONTROL_START.\r
+*/\r
+static inline int service_control_response(unsigned long control, unsigned long status) {\r
+ switch (control) {\r
+ case NSSM_SERVICE_CONTROL_START:\r
+ switch (status) {\r
+ case SERVICE_START_PENDING:\r
+ return 1;\r
+\r
+ case SERVICE_RUNNING:\r
+ return 0;\r
+\r
+ default:\r
+ return -1;\r
+ }\r
+\r
+ case SERVICE_CONTROL_STOP:\r
+ case SERVICE_CONTROL_SHUTDOWN:\r
+ switch (status) {\r
+ case SERVICE_STOP_PENDING:\r
+ return 1;\r
+\r
+ case SERVICE_STOPPED:\r
+ return 0;\r
+\r
+ default:\r
+ return -1;\r
+ }\r
+\r
+ case SERVICE_CONTROL_PAUSE:\r
+ switch (status) {\r
+ case SERVICE_PAUSE_PENDING:\r
+ return 1;\r
+\r
+ case SERVICE_PAUSED:\r
+ return 0;\r
+\r
+ default:\r
+ return -1;\r
+ }\r
+\r
+ case SERVICE_CONTROL_CONTINUE:\r
+ switch (status) {\r
+ case SERVICE_CONTINUE_PENDING:\r
+ return 1;\r
+\r
+ case SERVICE_RUNNING:\r
+ return 0;\r
+\r
+ default:\r
+ return -1;\r
+ }\r
+\r
+ case SERVICE_CONTROL_INTERROGATE:\r
+ return 0;\r
+ }\r
+\r
+ return 0;\r
+}\r
+\r
+static inline int await_service_control_response(unsigned long control, SC_HANDLE service_handle, SERVICE_STATUS *service_status, unsigned long initial_status) {\r
+ int tries = 0;\r
+ while (QueryServiceStatus(service_handle, service_status)) {\r
+ int response = service_control_response(control, service_status->dwCurrentState);\r
+ /* Alas we can't WaitForSingleObject() on an SC_HANDLE. */\r
+ if (! response) return response;\r
+ if (response > 0 || service_status->dwCurrentState == initial_status) {\r
+ if (++tries > 10) return response;\r
+ Sleep(50 * tries);\r
+ }\r
+ else return response;\r
+ }\r
+ return -1;\r
+}\r
+\r