#include "nssm.h"
+int get_process_creation_time(HANDLE process_handle, FILETIME *ft) {
+ FILETIME creation_time, exit_time, kernel_time, user_time;
+
+ if (! GetProcessTimes(process_handle, &creation_time, &exit_time, &kernel_time, &user_time)) {
+ log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_GETPROCESSTIMES_FAILED, error_string(GetLastError()), 0);
+ return 1;
+ }
+
+ memmove(ft, &creation_time, sizeof(creation_time));
+
+ return 0;
+}
+
+int get_process_exit_time(HANDLE process_handle, FILETIME *ft) {
+ FILETIME creation_time, exit_time, kernel_time, user_time;
+
+ if (! GetProcessTimes(process_handle, &creation_time, &exit_time, &kernel_time, &user_time)) {
+ log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_GETPROCESSTIMES_FAILED, error_string(GetLastError()), 0);
+ return 1;
+ }
+
+ memmove(ft, &exit_time, sizeof(exit_time));
+
+ return 0;
+}
+
+int check_parent(char *service_name, PROCESSENTRY32 *pe, unsigned long ppid, FILETIME *pft, FILETIME *exit_time) {
+ /* Check parent process ID matches. */
+ if (pe->th32ParentProcessID != ppid) return 1;
+
+ /*
+ Process IDs can be reused so do a sanity check by making sure the child
+ has been running for less time than the parent.
+ Though unlikely, it's possible that the parent exited and its process ID
+ was already reused, so we'll also compare against its exit time.
+ */
+ HANDLE process_handle = OpenProcess(PROCESS_QUERY_INFORMATION, false, pe->th32ProcessID);
+ if (! process_handle) {
+ char pid_string[16];
+ _snprintf(pid_string, sizeof(pid_string), "%d", pe->th32ProcessID);
+ log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_OPENPROCESS_FAILED, pid_string, service_name, error_string(GetLastError()), 0);
+ return 2;
+ }
+
+ FILETIME ft;
+ if (get_process_creation_time(process_handle, &ft)) {
+ CloseHandle(process_handle);
+ return 3;
+ }
+
+ CloseHandle(process_handle);
+
+ /* Verify that the parent's creation time is not later. */
+ if (CompareFileTime(pft, &ft) > 0) return 4;
+
+ /* Verify that the parent's exit time is not earlier. */
+ if (CompareFileTime(exit_time, &ft) < 0) return 5;
+
+ return 0;
+}
+
/* Send some window messages and hope the window respects one or more. */
int CALLBACK kill_window(HWND window, LPARAM arg) {
kill_t *k = (kill_t *) arg;
if (! Thread32First(snapshot, &te)) {
log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_THREAD_ENUMERATE_FAILED, service_name, error_string(GetLastError()), 0);
+ CloseHandle(snapshot);
return 0;
}
unsigned long error = GetLastError();
if (error == ERROR_NO_MORE_FILES) break;
log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_THREAD_ENUMERATE_FAILED, service_name, error_string(GetLastError()), 0);
+ CloseHandle(snapshot);
return ret;
}
}
}
+ CloseHandle(snapshot);
+
return ret;
}
int kill_process(char *service_name, HANDLE process_handle, unsigned long pid, unsigned long exitcode) {
/* Shouldn't happen. */
if (! pid) return 1;
+ if (! process_handle) return 1;
+
+ unsigned long ret;
+ if (GetExitCodeProcess(process_handle, &ret)) {
+ if (ret != STILL_ACTIVE) return 1;
+ }
kill_t k = { pid, exitcode, 0 };
+ /* Try to send a Control-C event to the console. */
+ if (! kill_console(service_name, process_handle, pid)) return 1;
+
/*
Try to post messages to the windows belonging to the given process ID.
If the process is a console application it won't have any windows so there's
return TerminateProcess(process_handle, exitcode);
}
-void kill_process_tree(char *service_name, unsigned long pid, unsigned long exitcode, unsigned long ppid) {
+/* Simulate a Control-C event to our console (shared with the app). */
+int kill_console(char *service_name, HANDLE process_handle, unsigned long pid) {
+ unsigned long ret;
+
+ /* Try to attach to the process's console. */
+ if (! AttachConsole(pid)) {
+ ret = GetLastError();
+
+ switch (ret) {
+ case ERROR_INVALID_HANDLE:
+ /* The app doesn't have a console. */
+ return 1;
+
+ case ERROR_GEN_FAILURE:
+ /* The app already exited. */
+ return 2;
+
+ case ERROR_ACCESS_DENIED:
+ default:
+ /* We already have a console. */
+ log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_ATTACHCONSOLE_FAILED, service_name, error_string(ret), 0);
+ return 3;
+ }
+ }
+
+ /* Ignore the event ourselves. */
+ ret = 0;
+ if (! SetConsoleCtrlHandler(0, TRUE)) {
+ log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_SETCONSOLECTRLHANDLER_FAILED, service_name, error_string(GetLastError()), 0);
+ ret = 4;
+ }
+
+ /* Sent the event. */
+ if (! ret) {
+ if (! GenerateConsoleCtrlEvent(CTRL_C_EVENT, 0)) {
+ log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_GENERATECONSOLECTRLEVENT_FAILED, service_name, error_string(GetLastError()), 0);
+ ret = 5;
+ }
+ }
+
+ /* Detach from the console. */
+ if (! FreeConsole()) {
+ log_event(EVENTLOG_WARNING_TYPE, NSSM_EVENT_FREECONSOLE_FAILED, service_name, error_string(GetLastError()), 0);
+ }
+
+ /* Wait for process to exit. */
+ if (! WaitForSingleObject(process_handle, NSSM_KILL_CONSOLE_GRACE_PERIOD)) return 6;
+
+ return ret;
+}
+
+void kill_process_tree(char *service_name, unsigned long pid, unsigned long exitcode, unsigned long ppid, FILETIME *parent_creation_time, FILETIME *parent_exit_time) {
/* Shouldn't happen unless the service failed to start. */
if (! pid) return;
if (! Process32First(snapshot, &pe)) {
log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_PROCESS_ENUMERATE_FAILED, service_name, error_string(GetLastError()), 0);
+ CloseHandle(snapshot);
return;
}
/* This is a child of the doomed process so kill it. */
- if (pe.th32ParentProcessID == pid) kill_process_tree(service_name, pe.th32ProcessID, exitcode, ppid);
+ if (! check_parent(service_name, &pe, pid, parent_creation_time, parent_exit_time)) kill_process_tree(service_name, pe.th32ProcessID, exitcode, ppid, parent_creation_time, parent_exit_time);
while (true) {
/* Try to get the next process. */
unsigned long ret = GetLastError();
if (ret == ERROR_NO_MORE_FILES) break;
log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_PROCESS_ENUMERATE_FAILED, service_name, error_string(GetLastError()), 0);
+ CloseHandle(snapshot);
return;
}
- if (pe.th32ParentProcessID == pid) kill_process_tree(service_name, pe.th32ProcessID, exitcode, ppid);
+ if (! check_parent(service_name, &pe, pid, parent_creation_time, parent_exit_time)) kill_process_tree(service_name, pe.th32ProcessID, exitcode, ppid, parent_creation_time, parent_exit_time);
}
+ CloseHandle(snapshot);
+
/* We will need a process handle in order to call TerminateProcess() later. */
HANDLE process_handle = OpenProcess(SYNCHRONIZE | PROCESS_QUERY_INFORMATION | PROCESS_VM_READ | PROCESS_TERMINATE, false, pid);
if (! process_handle) {
_snprintf(ppid_string, sizeof(ppid_string), "%d", ppid);
log_event(EVENTLOG_INFORMATION_TYPE, NSSM_EVENT_KILL_PROCESS_TREE, pid_string, ppid_string, service_name, 0);
if (! kill_process(service_name, process_handle, pid, exitcode)) {
- log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_TERMINATEPROCESS_FAILED, pid_string, service_name, error_string(GetLastError()), 0);
- return;
+ /* Maybe it already died. */
+ unsigned long ret;
+ if (! GetExitCodeProcess(process_handle, &ret) || ret == STILL_ACTIVE) log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_TERMINATEPROCESS_FAILED, pid_string, service_name, error_string(GetLastError()), 0);
}
+
+ CloseHandle(process_handle);
}
git://git.iain.cx/iain / nssm.git / blobdiff