Command to show processes started by the service.

[nssm.git] / service.cpp

diff --git a/service.cpp b/service.cpp
index f18626c..849f790 100644 (file)
--- a/service.cpp
+++ b/service.cpp
@@ -2267,3 +2267,77 @@ int list_nssm_services() {
   HeapFree(GetProcessHeap(), 0, status);\r
   return 0;\r
 }\r
+\r
+int service_process_tree(int argc, TCHAR **argv) {\r
+  int errors = 0;\r
+  if (argc < 1) return usage(1);\r
+\r
+  SC_HANDLE services = open_service_manager(SC_MANAGER_CONNECT);\r
+  if (! services) {\r
+    print_message(stderr, NSSM_MESSAGE_OPEN_SERVICE_MANAGER_FAILED);\r
+    return 1;\r
+  }\r
+\r
+  /*\r
+    We need SeDebugPrivilege to read the process tree.\r
+    We ignore failure here so that an error will be printed later when we\r
+    try to open a process handle.\r
+  */\r
+  HANDLE token = get_debug_token();\r
+\r
+  TCHAR canonical_name[SERVICE_NAME_LENGTH];\r
+  SERVICE_STATUS_PROCESS service_status;\r
+  nssm_service_t *service;\r
+  kill_t k;\r
+\r
+  int i;\r
+  for (i = 0; i < argc; i++) {\r
+    TCHAR *service_name = argv[i];\r
+    SC_HANDLE service_handle = open_service(services, service_name, SERVICE_QUERY_STATUS, canonical_name, _countof(canonical_name));\r
+    if (! service_handle) {\r
+      errors++;\r
+      continue;\r
+    }\r
+\r
+    unsigned long size;\r
+    int ret = QueryServiceStatusEx(service_handle, SC_STATUS_PROCESS_INFO, (LPBYTE) &service_status, sizeof(service_status), &size);\r
+    long error = GetLastError();\r
+    CloseServiceHandle(service_handle);\r
+    if (! ret) {\r
+      _ftprintf(stderr, _T("%s: %s\n"), canonical_name, error_string(error));\r
+      errors++;\r
+      continue;\r
+    }\r
+\r
+    ZeroMemory(&k, sizeof(k));\r
+    k.pid = service_status.dwProcessId;\r
+    if (! k.pid) continue;\r
+\r
+    k.process_handle = OpenProcess(PROCESS_QUERY_INFORMATION | PROCESS_VM_READ, false, k.pid);\r
+    if (! k.process_handle) {\r
+      _ftprintf(stderr, _T("%s: %lu: %s\n"), canonical_name, k.pid, error_string(GetLastError()));\r
+      continue;\r
+    }\r
+\r
+    if (get_process_creation_time(k.process_handle, &k.creation_time)) continue;\r
+    /* Dummy exit time so we can check processes' parents. */\r
+    GetSystemTimeAsFileTime(&k.exit_time);\r
+\r
+    service = alloc_nssm_service();\r
+    if (! service) {\r
+      errors++;\r
+      continue;\r
+    }\r
+\r
+    _sntprintf_s(service->name, _countof(service->name), _TRUNCATE, _T("%s"), canonical_name);\r
+    k.name = service->name;\r
+    walk_process_tree(service, print_process, &k, k.pid);\r
+\r
+    cleanup_nssm_service(service);\r
+  }\r
+\r
+  CloseServiceHandle(services);\r
+  if (token != INVALID_HANDLE_VALUE) CloseHandle(token);\r
+\r
+  return errors;\r
+}\r