+int expand_parameter(HKEY key, char *value, char *data, unsigned long datalen) {\r
+ unsigned char *buffer = (unsigned char *) HeapAlloc(GetProcessHeap(), 0, datalen);\r
+ if (! buffer) {\r
+ log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_OUT_OF_MEMORY, value, "expand_parameter()", 0);\r
+ return 1;\r
+ }\r
+\r
+ unsigned long type = REG_EXPAND_SZ;\r
+ unsigned long buflen = datalen;\r
+\r
+ if (RegQueryValueEx(key, value, 0, &type, buffer, &buflen) != ERROR_SUCCESS) {\r
+ log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_QUERYVALUE_FAILED, value, GetLastError(), 0);\r
+ HeapFree(GetProcessHeap(), 0, buffer);\r
+ return 2;\r
+ }\r
+\r
+ ZeroMemory(data, datalen);\r
+\r
+ /* Technically we shouldn't expand environment strings from REG_SZ values */\r
+ if (type != REG_EXPAND_SZ) {\r
+ memmove(data, buffer, buflen);\r
+ return 0;\r
+ }\r
+\r
+ unsigned long ret = ExpandEnvironmentStrings((char *) buffer, data, datalen);\r
+ if (! ret || ret > datalen) {\r
+ log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_EXPANDENVIRONMENTSTRINGS_FAILED, value, buffer, GetLastError(), 0);\r
+ HeapFree(GetProcessHeap(), 0, buffer);\r
+ return 3;\r
+ }\r
+ log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_EXPANDENVIRONMENTSTRINGS_FAILED, buffer, data, GetLastError(), 0);\r
+\r
+ HeapFree(GetProcessHeap(), 0, buffer);\r
+ return 0;\r
+}\r
+\r