- static char message[65535];\r
- if (! FormatMessage(FORMAT_MESSAGE_FROM_HMODULE, 0, NSSM_MESSAGE_DEFAULT, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), message, sizeof(message), 0)) return 0;\r
- return message;\r
+ /* Thread-safe buffer */\r
+ char *error_message = (char *) TlsGetValue(tls_index);\r
+ if (! error_message) {\r
+ error_message = (char *) LocalAlloc(LPTR, NSSM_ERROR_BUFSIZE);\r
+ if (! error_message) return "<out of memory for error message>";\r
+ TlsSetValue(tls_index, (void *) error_message);\r
+ }\r
+\r
+ if (! FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, 0, error, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (char *) error_message, NSSM_ERROR_BUFSIZE, 0)) {\r
+ if (_snprintf(error_message, NSSM_ERROR_BUFSIZE, "system error %lu", error) < 0) return 0;\r
+ }\r
+ return error_message;\r