3 extern imports_t imports;
5 int get_process_creation_time(HANDLE process_handle, FILETIME *ft) {
6 FILETIME creation_time, exit_time, kernel_time, user_time;
8 if (! GetProcessTimes(process_handle, &creation_time, &exit_time, &kernel_time, &user_time)) {
9 log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_GETPROCESSTIMES_FAILED, error_string(GetLastError()), 0);
13 memmove(ft, &creation_time, sizeof(creation_time));
18 int get_process_exit_time(HANDLE process_handle, FILETIME *ft) {
19 FILETIME creation_time, exit_time, kernel_time, user_time;
21 if (! GetProcessTimes(process_handle, &creation_time, &exit_time, &kernel_time, &user_time)) {
22 log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_GETPROCESSTIMES_FAILED, error_string(GetLastError()), 0);
26 memmove(ft, &exit_time, sizeof(exit_time));
31 int check_parent(char *service_name, PROCESSENTRY32 *pe, unsigned long ppid, FILETIME *pft, FILETIME *exit_time) {
32 /* Check parent process ID matches. */
33 if (pe->th32ParentProcessID != ppid) return 1;
36 Process IDs can be reused so do a sanity check by making sure the child
37 has been running for less time than the parent.
38 Though unlikely, it's possible that the parent exited and its process ID
39 was already reused, so we'll also compare against its exit time.
41 HANDLE process_handle = OpenProcess(PROCESS_QUERY_INFORMATION, false, pe->th32ProcessID);
42 if (! process_handle) {
44 _snprintf_s(pid_string, sizeof(pid_string), _TRUNCATE, "%d", pe->th32ProcessID);
45 log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_OPENPROCESS_FAILED, pid_string, service_name, error_string(GetLastError()), 0);
50 if (get_process_creation_time(process_handle, &ft)) {
51 CloseHandle(process_handle);
55 CloseHandle(process_handle);
57 /* Verify that the parent's creation time is not later. */
58 if (CompareFileTime(pft, &ft) > 0) return 4;
60 /* Verify that the parent's exit time is not earlier. */
61 if (CompareFileTime(exit_time, &ft) < 0) return 5;
66 /* Send some window messages and hope the window respects one or more. */
67 int CALLBACK kill_window(HWND window, LPARAM arg) {
68 kill_t *k = (kill_t *) arg;
71 if (! GetWindowThreadProcessId(window, &pid)) return 1;
72 if (pid != k->pid) return 1;
74 /* First try sending WM_CLOSE to request that the window close. */
75 k->signalled |= PostMessage(window, WM_CLOSE, k->exitcode, 0);
78 Then tell the window that the user is logging off and it should exit
79 without worrying about saving any data.
81 k->signalled |= PostMessage(window, WM_ENDSESSION, 1, ENDSESSION_CLOSEAPP | ENDSESSION_CRITICAL | ENDSESSION_LOGOFF);
87 Try to post a message to the message queues of threads associated with the
88 given process ID. Not all threads have message queues so there's no
89 guarantee of success, and we don't want to be left waiting for unsignalled
90 processes so this function returns only true if at least one thread was
93 int kill_threads(char *service_name, kill_t *k) {
96 /* Get a snapshot of all threads in the system. */
97 HANDLE snapshot = CreateToolhelp32Snapshot(TH32CS_SNAPTHREAD, 0);
99 log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_CREATETOOLHELP32SNAPSHOT_THREAD_FAILED, service_name, error_string(GetLastError()), 0);
104 ZeroMemory(&te, sizeof(te));
105 te.dwSize = sizeof(te);
107 if (! Thread32First(snapshot, &te)) {
108 log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_THREAD_ENUMERATE_FAILED, service_name, error_string(GetLastError()), 0);
109 CloseHandle(snapshot);
113 /* This thread belongs to the doomed process so signal it. */
114 if (te.th32OwnerProcessID == k->pid) {
115 ret |= PostThreadMessage(te.th32ThreadID, WM_QUIT, k->exitcode, 0);
119 /* Try to get the next thread. */
120 if (! Thread32Next(snapshot, &te)) {
121 unsigned long error = GetLastError();
122 if (error == ERROR_NO_MORE_FILES) break;
123 log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_THREAD_ENUMERATE_FAILED, service_name, error_string(GetLastError()), 0);
124 CloseHandle(snapshot);
128 if (te.th32OwnerProcessID == k->pid) {
129 ret |= PostThreadMessage(te.th32ThreadID, WM_QUIT, k->exitcode, 0);
133 CloseHandle(snapshot);
138 /* Give the process a chance to die gracefully. */
139 int kill_process(char *service_name, unsigned long stop_method, HANDLE process_handle, unsigned long pid, unsigned long exitcode) {
140 /* Shouldn't happen. */
142 if (! process_handle) return 1;
145 if (GetExitCodeProcess(process_handle, &ret)) {
146 if (ret != STILL_ACTIVE) return 1;
149 kill_t k = { pid, exitcode, 0 };
151 /* Try to send a Control-C event to the console. */
152 if (stop_method & NSSM_STOP_METHOD_CONSOLE) {
153 if (! kill_console(service_name, process_handle, pid)) return 1;
157 Try to post messages to the windows belonging to the given process ID.
158 If the process is a console application it won't have any windows so there's
159 no guarantee of success.
161 if (stop_method & NSSM_STOP_METHOD_WINDOW) {
162 EnumWindows((WNDENUMPROC) kill_window, (LPARAM) &k);
164 if (! WaitForSingleObject(process_handle, NSSM_KILL_WINDOW_GRACE_PERIOD)) return 1;
169 Try to post messages to any thread message queues associated with the
170 process. Console applications might have them (but probably won't) so
171 there's still no guarantee of success.
173 if (stop_method & NSSM_STOP_METHOD_THREADS) {
174 if (kill_threads(service_name, &k)) {
175 if (! WaitForSingleObject(process_handle, NSSM_KILL_THREADS_GRACE_PERIOD)) return 1;
179 /* We tried being nice. Time for extreme prejudice. */
180 if (stop_method & NSSM_STOP_METHOD_TERMINATE) {
181 return TerminateProcess(process_handle, exitcode);
187 /* Simulate a Control-C event to our console (shared with the app). */
188 int kill_console(char *service_name, HANDLE process_handle, unsigned long pid) {
191 /* Check we loaded AttachConsole(). */
192 if (! imports.AttachConsole) return 4;
194 /* Try to attach to the process's console. */
195 if (! imports.AttachConsole(pid)) {
196 ret = GetLastError();
199 case ERROR_INVALID_HANDLE:
200 /* The app doesn't have a console. */
203 case ERROR_GEN_FAILURE:
204 /* The app already exited. */
207 case ERROR_ACCESS_DENIED:
209 /* We already have a console. */
210 log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_ATTACHCONSOLE_FAILED, service_name, error_string(ret), 0);
215 /* Ignore the event ourselves. */
217 if (! SetConsoleCtrlHandler(0, TRUE)) {
218 log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_SETCONSOLECTRLHANDLER_FAILED, service_name, error_string(GetLastError()), 0);
222 /* Send the event. */
224 if (! GenerateConsoleCtrlEvent(CTRL_C_EVENT, 0)) {
225 log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_GENERATECONSOLECTRLEVENT_FAILED, service_name, error_string(GetLastError()), 0);
230 /* Detach from the console. */
231 if (! FreeConsole()) {
232 log_event(EVENTLOG_WARNING_TYPE, NSSM_EVENT_FREECONSOLE_FAILED, service_name, error_string(GetLastError()), 0);
235 /* Wait for process to exit. */
236 if (WaitForSingleObject(process_handle, NSSM_KILL_CONSOLE_GRACE_PERIOD)) return 6;
241 void kill_process_tree(char *service_name, unsigned long stop_method, unsigned long pid, unsigned long exitcode, unsigned long ppid, FILETIME *parent_creation_time, FILETIME *parent_exit_time) {
242 /* Shouldn't happen unless the service failed to start. */
245 char pid_string[16], code[16];
246 _snprintf_s(pid_string, sizeof(pid_string), _TRUNCATE, "%d", pid);
247 _snprintf_s(code, sizeof(code), _TRUNCATE, "%d", exitcode);
248 log_event(EVENTLOG_INFORMATION_TYPE, NSSM_EVENT_KILLING, service_name, pid_string, code, 0);
250 /* Get a snapshot of all processes in the system. */
251 HANDLE snapshot = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0);
253 log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_CREATETOOLHELP32SNAPSHOT_PROCESS_FAILED, service_name, error_string(GetLastError()), 0);
258 ZeroMemory(&pe, sizeof(pe));
259 pe.dwSize = sizeof(pe);
261 if (! Process32First(snapshot, &pe)) {
262 log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_PROCESS_ENUMERATE_FAILED, service_name, error_string(GetLastError()), 0);
263 CloseHandle(snapshot);
267 /* This is a child of the doomed process so kill it. */
268 if (! check_parent(service_name, &pe, pid, parent_creation_time, parent_exit_time)) kill_process_tree(service_name, stop_method, pe.th32ProcessID, exitcode, ppid, parent_creation_time, parent_exit_time);
271 /* Try to get the next process. */
272 if (! Process32Next(snapshot, &pe)) {
273 unsigned long ret = GetLastError();
274 if (ret == ERROR_NO_MORE_FILES) break;
275 log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_PROCESS_ENUMERATE_FAILED, service_name, error_string(GetLastError()), 0);
276 CloseHandle(snapshot);
280 if (! check_parent(service_name, &pe, pid, parent_creation_time, parent_exit_time)) kill_process_tree(service_name, stop_method, pe.th32ProcessID, exitcode, ppid, parent_creation_time, parent_exit_time);
283 CloseHandle(snapshot);
285 /* We will need a process handle in order to call TerminateProcess() later. */
286 HANDLE process_handle = OpenProcess(SYNCHRONIZE | PROCESS_QUERY_INFORMATION | PROCESS_VM_READ | PROCESS_TERMINATE, false, pid);
287 if (! process_handle) {
288 log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_OPENPROCESS_FAILED, pid_string, service_name, error_string(GetLastError()), 0);
292 char ppid_string[16];
293 _snprintf_s(ppid_string, sizeof(ppid_string), _TRUNCATE, "%d", ppid);
294 log_event(EVENTLOG_INFORMATION_TYPE, NSSM_EVENT_KILL_PROCESS_TREE, pid_string, ppid_string, service_name, 0);
295 if (! kill_process(service_name, stop_method, process_handle, pid, exitcode)) {
296 /* Maybe it already died. */
298 if (! GetExitCodeProcess(process_handle, &ret) || ret == STILL_ACTIVE) {
299 if (stop_method & NSSM_STOP_METHOD_TERMINATE) log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_TERMINATEPROCESS_FAILED, pid_string, service_name, error_string(GetLastError()), 0);
300 else log_event(EVENTLOG_WARNING_TYPE, NSSM_EVENT_PROCESS_STILL_ACTIVE, service_name, pid_string, NSSM, NSSM_REG_STOP_METHOD_SKIP, 0);
304 CloseHandle(process_handle);