io.cpp 23 KB

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  1. #include "nssm.h"
  2. #define COMPLAINED_READ (1 << 0)
  3. #define COMPLAINED_WRITE (1 << 1)
  4. #define COMPLAINED_ROTATE (1 << 2)
  5. static HANDLE create_logging_thread(TCHAR *service_name, TCHAR *path, unsigned long sharing, unsigned long disposition, unsigned long flags, HANDLE *read_handle_ptr, HANDLE *pipe_handle_ptr, HANDLE *write_handle_ptr, unsigned long rotate_bytes_low, unsigned long rotate_bytes_high, unsigned long rotate_delay, unsigned long *tid_ptr, unsigned long *rotate_online, bool copy_and_truncate) {
  6. *tid_ptr = 0;
  7. /* Pipe between application's stdout/stderr and our logging handle. */
  8. if (read_handle_ptr && ! *read_handle_ptr) {
  9. if (pipe_handle_ptr && ! *pipe_handle_ptr) {
  10. if (CreatePipe(read_handle_ptr, pipe_handle_ptr, 0, 0)) {
  11. SetHandleInformation(*pipe_handle_ptr, HANDLE_FLAG_INHERIT, HANDLE_FLAG_INHERIT);
  12. }
  13. else {
  14. log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_CREATEPIPE_FAILED, service_name, path, error_string(GetLastError()));
  15. return (HANDLE) 0;
  16. }
  17. }
  18. }
  19. logger_t *logger = (logger_t *) HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(logger_t));
  20. if (! logger) {
  21. log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_OUT_OF_MEMORY, _T("logger"), _T("create_logging_thread()"), 0);
  22. return (HANDLE) 0;
  23. }
  24. ULARGE_INTEGER size;
  25. size.LowPart = rotate_bytes_low;
  26. size.HighPart = rotate_bytes_high;
  27. logger->service_name = service_name;
  28. logger->path = path;
  29. logger->sharing = sharing;
  30. logger->disposition = disposition;
  31. logger->flags = flags;
  32. logger->read_handle = *read_handle_ptr;
  33. logger->write_handle = *write_handle_ptr;
  34. logger->size = (__int64) size.QuadPart;
  35. logger->tid_ptr = tid_ptr;
  36. logger->rotate_online = rotate_online;
  37. logger->rotate_delay = rotate_delay;
  38. logger->copy_and_truncate = copy_and_truncate;
  39. HANDLE thread_handle = CreateThread(NULL, 0, log_and_rotate, (void *) logger, 0, logger->tid_ptr);
  40. if (! thread_handle) {
  41. log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_CREATETHREAD_FAILED, error_string(GetLastError()), 0);
  42. HeapFree(GetProcessHeap(), 0, logger);
  43. }
  44. return thread_handle;
  45. }
  46. static inline unsigned long guess_charsize(void *address, unsigned long bufsize) {
  47. if (IsTextUnicode(address, bufsize, 0)) return (unsigned long) sizeof(wchar_t);
  48. else return (unsigned long) sizeof(char);
  49. }
  50. static inline void write_bom(logger_t *logger, unsigned long *out) {
  51. wchar_t bom = L'\ufeff';
  52. if (! WriteFile(logger->write_handle, (void *) &bom, sizeof(bom), out, 0)) {
  53. log_event(EVENTLOG_WARNING_TYPE, NSSM_EVENT_SOMEBODY_SET_UP_US_THE_BOM, logger->service_name, logger->path, error_string(GetLastError()), 0);
  54. }
  55. }
  56. /* Get path, share mode, creation disposition and flags for a stream. */
  57. int get_createfile_parameters(HKEY key, TCHAR *prefix, TCHAR *path, unsigned long *sharing, unsigned long default_sharing, unsigned long *disposition, unsigned long default_disposition, unsigned long *flags, unsigned long default_flags, bool *copy_and_truncate) {
  58. TCHAR value[NSSM_STDIO_LENGTH];
  59. /* Path. */
  60. if (_sntprintf_s(value, _countof(value), _TRUNCATE, _T("%s"), prefix) < 0) {
  61. log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_OUT_OF_MEMORY, prefix, _T("get_createfile_parameters()"), 0);
  62. return 1;
  63. }
  64. switch (expand_parameter(key, value, path, PATH_LENGTH, true, false)) {
  65. case 0: if (! path[0]) return 0; break; /* OK. */
  66. default: return 2; /* Error. */
  67. }
  68. /* ShareMode. */
  69. if (_sntprintf_s(value, _countof(value), _TRUNCATE, _T("%s%s"), prefix, NSSM_REG_STDIO_SHARING) < 0) {
  70. log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_OUT_OF_MEMORY, NSSM_REG_STDIO_SHARING, _T("get_createfile_parameters()"), 0);
  71. return 3;
  72. }
  73. switch (get_number(key, value, sharing, false)) {
  74. case 0: *sharing = default_sharing; break; /* Missing. */
  75. case 1: break; /* Found. */
  76. case -2: return 4; break; /* Error. */
  77. }
  78. /* CreationDisposition. */
  79. if (_sntprintf_s(value, _countof(value), _TRUNCATE, _T("%s%s"), prefix, NSSM_REG_STDIO_DISPOSITION) < 0) {
  80. log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_OUT_OF_MEMORY, NSSM_REG_STDIO_DISPOSITION, _T("get_createfile_parameters()"), 0);
  81. return 5;
  82. }
  83. switch (get_number(key, value, disposition, false)) {
  84. case 0: *disposition = default_disposition; break; /* Missing. */
  85. case 1: break; /* Found. */
  86. case -2: return 6; break; /* Error. */
  87. }
  88. /* Flags. */
  89. if (_sntprintf_s(value, _countof(value), _TRUNCATE, _T("%s%s"), prefix, NSSM_REG_STDIO_FLAGS) < 0) {
  90. log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_OUT_OF_MEMORY, NSSM_REG_STDIO_FLAGS, _T("get_createfile_parameters()"), 0);
  91. return 7;
  92. }
  93. switch (get_number(key, value, flags, false)) {
  94. case 0: *flags = default_flags; break; /* Missing. */
  95. case 1: break; /* Found. */
  96. case -2: return 8; break; /* Error. */
  97. }
  98. /* Rotate with CopyFile() and SetEndOfFile(). */
  99. if (copy_and_truncate) {
  100. unsigned long data;
  101. if (_sntprintf_s(value, _countof(value), _TRUNCATE, _T("%s%s"), prefix, NSSM_REG_STDIO_COPY_AND_TRUNCATE) < 0) {
  102. log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_OUT_OF_MEMORY, NSSM_REG_STDIO_COPY_AND_TRUNCATE, _T("get_createfile_parameters()"), 0);
  103. return 9;
  104. }
  105. switch (get_number(key, value, &data, false)) {
  106. case 0: *copy_and_truncate = false; break; /* Missing. */
  107. case 1: /* Found. */
  108. if (data) *copy_and_truncate = true;
  109. else *copy_and_truncate = false;
  110. break;
  111. case -2: return 9; break; /* Error. */
  112. }
  113. }
  114. return 0;
  115. }
  116. int set_createfile_parameter(HKEY key, TCHAR *prefix, TCHAR *suffix, unsigned long number) {
  117. TCHAR value[NSSM_STDIO_LENGTH];
  118. if (_sntprintf_s(value, _countof(value), _TRUNCATE, _T("%s%s"), prefix, suffix) < 0) {
  119. log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_OUT_OF_MEMORY, suffix, _T("set_createfile_parameter()"), 0);
  120. return 1;
  121. }
  122. return set_number(key, value, number);
  123. }
  124. int delete_createfile_parameter(HKEY key, TCHAR *prefix, TCHAR *suffix) {
  125. TCHAR value[NSSM_STDIO_LENGTH];
  126. if (_sntprintf_s(value, _countof(value), _TRUNCATE, _T("%s%s"), prefix, suffix) < 0) {
  127. log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_OUT_OF_MEMORY, suffix, _T("delete_createfile_parameter()"), 0);
  128. return 1;
  129. }
  130. if (RegDeleteValue(key, value)) return 0;
  131. return 1;
  132. }
  133. HANDLE write_to_file(TCHAR *path, unsigned long sharing, SECURITY_ATTRIBUTES *attributes, unsigned long disposition, unsigned long flags) {
  134. HANDLE ret = CreateFile(path, FILE_WRITE_DATA, sharing, attributes, disposition, flags, 0);
  135. if (ret) {
  136. if (SetFilePointer(ret, 0, 0, FILE_END) != INVALID_SET_FILE_POINTER) SetEndOfFile(ret);
  137. return ret;
  138. }
  139. log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_CREATEFILE_FAILED, path, error_string(GetLastError()), 0);
  140. return ret;
  141. }
  142. static void rotated_filename(TCHAR *path, TCHAR *rotated, unsigned long rotated_len, SYSTEMTIME *st) {
  143. if (! st) {
  144. SYSTEMTIME now;
  145. st = &now;
  146. GetSystemTime(st);
  147. }
  148. TCHAR buffer[PATH_LENGTH];
  149. memmove(buffer, path, sizeof(buffer));
  150. TCHAR *ext = PathFindExtension(buffer);
  151. TCHAR extension[PATH_LENGTH];
  152. _sntprintf_s(extension, _countof(extension), _TRUNCATE, _T("-%04u%02u%02uT%02u%02u%02u.%03u%s"), st->wYear, st->wMonth, st->wDay, st->wHour, st->wMinute, st->wSecond, st->wMilliseconds, ext);
  153. *ext = _T('\0');
  154. _sntprintf_s(rotated, rotated_len, _TRUNCATE, _T("%s%s"), buffer, extension);
  155. }
  156. void rotate_file(TCHAR *service_name, TCHAR *path, unsigned long seconds, unsigned long delay, unsigned long low, unsigned long high, bool copy_and_truncate) {
  157. unsigned long error;
  158. /* Now. */
  159. SYSTEMTIME st;
  160. GetSystemTime(&st);
  161. BY_HANDLE_FILE_INFORMATION info;
  162. /* Try to open the file to check if it exists and to get attributes. */
  163. HANDLE file = CreateFile(path, 0, FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0);
  164. if (file) {
  165. /* Get file attributes. */
  166. if (! GetFileInformationByHandle(file, &info)) {
  167. /* Reuse current time for rotation timestamp. */
  168. seconds = low = high = 0;
  169. SystemTimeToFileTime(&st, &info.ftLastWriteTime);
  170. }
  171. CloseHandle(file);
  172. }
  173. else {
  174. error = GetLastError();
  175. if (error == ERROR_FILE_NOT_FOUND) return;
  176. log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_ROTATE_FILE_FAILED, service_name, path, _T("CreateFile()"), path, error_string(error), 0);
  177. /* Reuse current time for rotation timestamp. */
  178. seconds = low = high = 0;
  179. SystemTimeToFileTime(&st, &info.ftLastWriteTime);
  180. }
  181. /* Check file age. */
  182. if (seconds) {
  183. FILETIME ft;
  184. SystemTimeToFileTime(&st, &ft);
  185. ULARGE_INTEGER s;
  186. s.LowPart = ft.dwLowDateTime;
  187. s.HighPart = ft.dwHighDateTime;
  188. s.QuadPart -= seconds * 10000000LL;
  189. ft.dwLowDateTime = s.LowPart;
  190. ft.dwHighDateTime = s.HighPart;
  191. if (CompareFileTime(&info.ftLastWriteTime, &ft) > 0) return;
  192. }
  193. /* Check file size. */
  194. if (low || high) {
  195. if (info.nFileSizeHigh < high) return;
  196. if (info.nFileSizeHigh == high && info.nFileSizeLow < low) return;
  197. }
  198. /* Get new filename. */
  199. FileTimeToSystemTime(&info.ftLastWriteTime, &st);
  200. TCHAR rotated[PATH_LENGTH];
  201. rotated_filename(path, rotated, _countof(rotated), &st);
  202. /* Rotate. */
  203. bool ok = true;
  204. TCHAR *function;
  205. if (copy_and_truncate) {
  206. function = _T("CopyFile()");
  207. if (CopyFile(path, rotated, TRUE)) {
  208. file = write_to_file(path, NSSM_STDOUT_SHARING, 0, NSSM_STDOUT_DISPOSITION, NSSM_STDOUT_FLAGS);
  209. Sleep(delay);
  210. SetFilePointer(file, 0, 0, FILE_BEGIN);
  211. SetEndOfFile(file);
  212. CloseHandle(file);
  213. }
  214. else ok = false;
  215. }
  216. else {
  217. function = _T("MoveFile()");
  218. if (! MoveFile(path, rotated)) ok = false;
  219. }
  220. if (ok) {
  221. log_event(EVENTLOG_INFORMATION_TYPE, NSSM_EVENT_ROTATED, service_name, path, rotated, 0);
  222. return;
  223. }
  224. error = GetLastError();
  225. if (error == ERROR_FILE_NOT_FOUND) return;
  226. log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_ROTATE_FILE_FAILED, service_name, path, function, rotated, error_string(error), 0);
  227. return;
  228. }
  229. int get_output_handles(nssm_service_t *service, STARTUPINFO *si) {
  230. if (! si) return 1;
  231. /* Allocate a new console so we get a fresh stdin, stdout and stderr. */
  232. alloc_console(service);
  233. /* stdin */
  234. if (service->stdin_path[0]) {
  235. si->hStdInput = CreateFile(service->stdin_path, FILE_READ_DATA, service->stdin_sharing, 0, service->stdin_disposition, service->stdin_flags, 0);
  236. if (! si->hStdInput) {
  237. log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_CREATEFILE_FAILED, service->stdin_path, error_string(GetLastError()), 0);
  238. return 2;
  239. }
  240. }
  241. /* stdout */
  242. if (service->stdout_path[0]) {
  243. if (service->rotate_files) rotate_file(service->name, service->stdout_path, service->rotate_seconds, service->rotate_bytes_low, service->rotate_bytes_high, service->rotate_delay, service->stdout_copy_and_truncate);
  244. HANDLE stdout_handle = write_to_file(service->stdout_path, service->stdout_sharing, 0, service->stdout_disposition, service->stdout_flags);
  245. if (! stdout_handle) return 4;
  246. if (service->rotate_files && service->rotate_stdout_online) {
  247. service->stdout_pipe = si->hStdOutput = 0;
  248. service->stdout_thread = create_logging_thread(service->name, service->stdout_path, service->stdout_sharing, service->stdout_disposition, service->stdout_flags, &service->stdout_pipe, &si->hStdOutput, &stdout_handle, service->rotate_bytes_low, service->rotate_bytes_high, service->rotate_delay, &service->stdout_tid, &service->rotate_stdout_online, service->stdout_copy_and_truncate);
  249. if (! service->stdout_thread) {
  250. CloseHandle(service->stdout_pipe);
  251. CloseHandle(si->hStdOutput);
  252. }
  253. }
  254. else service->stdout_thread = 0;
  255. if (! service->stdout_thread) {
  256. if (! DuplicateHandle(GetCurrentProcess(), stdout_handle, GetCurrentProcess(), &si->hStdOutput, 0, true, DUPLICATE_CLOSE_SOURCE | DUPLICATE_SAME_ACCESS)) {
  257. log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_DUPLICATEHANDLE_FAILED, NSSM_REG_STDOUT, _T("stdout"), error_string(GetLastError()), 0);
  258. return 4;
  259. }
  260. service->rotate_stdout_online = NSSM_ROTATE_OFFLINE;
  261. }
  262. }
  263. /* stderr */
  264. if (service->stderr_path[0]) {
  265. /* Same as stdout? */
  266. if (str_equiv(service->stderr_path, service->stdout_path)) {
  267. service->stderr_sharing = service->stdout_sharing;
  268. service->stderr_disposition = service->stdout_disposition;
  269. service->stderr_flags = service->stdout_flags;
  270. service->rotate_stderr_online = NSSM_ROTATE_OFFLINE;
  271. /* Two handles to the same file will create a race. */
  272. if (! DuplicateHandle(GetCurrentProcess(), si->hStdOutput, GetCurrentProcess(), &si->hStdError, 0, true, DUPLICATE_SAME_ACCESS)) {
  273. log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_DUPLICATEHANDLE_FAILED, NSSM_REG_STDOUT, _T("stderr"), error_string(GetLastError()), 0);
  274. return 6;
  275. }
  276. }
  277. else {
  278. if (service->rotate_files) rotate_file(service->name, service->stderr_path, service->rotate_seconds, service->rotate_bytes_low, service->rotate_bytes_high, service->rotate_delay, service->stderr_copy_and_truncate);
  279. HANDLE stderr_handle = write_to_file(service->stderr_path, service->stderr_sharing, 0, service->stderr_disposition, service->stderr_flags);
  280. if (! stderr_handle) return 7;
  281. if (service->rotate_files && service->rotate_stderr_online) {
  282. service->stderr_pipe = si->hStdError = 0;
  283. service->stderr_thread = create_logging_thread(service->name, service->stderr_path, service->stderr_sharing, service->stderr_disposition, service->stderr_flags, &service->stderr_pipe, &si->hStdError, &stderr_handle, service->rotate_bytes_low, service->rotate_bytes_high, service->rotate_delay, &service->stderr_tid, &service->rotate_stderr_online, service->stderr_copy_and_truncate);
  284. if (! service->stderr_thread) {
  285. CloseHandle(service->stderr_pipe);
  286. CloseHandle(si->hStdError);
  287. }
  288. }
  289. else service->stderr_thread = 0;
  290. if (! service->stderr_thread) {
  291. if (! DuplicateHandle(GetCurrentProcess(), stderr_handle, GetCurrentProcess(), &si->hStdError, 0, true, DUPLICATE_CLOSE_SOURCE | DUPLICATE_SAME_ACCESS)) {
  292. log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_DUPLICATEHANDLE_FAILED, NSSM_REG_STDERR, _T("stderr"), error_string(GetLastError()), 0);
  293. return 7;
  294. }
  295. service->rotate_stderr_online = NSSM_ROTATE_OFFLINE;
  296. }
  297. }
  298. }
  299. /*
  300. We need to set the startup_info flags to make the new handles
  301. inheritable by the new process.
  302. */
  303. si->dwFlags |= STARTF_USESTDHANDLES;
  304. if (service->no_console) return 0;
  305. /* Redirect other handles. */
  306. if (! si->hStdInput) {
  307. if (! DuplicateHandle(GetCurrentProcess(), GetStdHandle(STD_INPUT_HANDLE), GetCurrentProcess(), &si->hStdInput, 0, true, DUPLICATE_SAME_ACCESS)) {
  308. log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_DUPLICATEHANDLE_FAILED, _T("STD_INPUT_HANDLE"), _T("stdin"), error_string(GetLastError()), 0);
  309. return 8;
  310. }
  311. }
  312. if (! si->hStdOutput) {
  313. if (! DuplicateHandle(GetCurrentProcess(), GetStdHandle(STD_OUTPUT_HANDLE), GetCurrentProcess(), &si->hStdOutput, 0, true, DUPLICATE_SAME_ACCESS)) {
  314. log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_DUPLICATEHANDLE_FAILED, _T("STD_OUTPUT_HANDLE"), _T("stdout"), error_string(GetLastError()), 0);
  315. return 9;
  316. }
  317. }
  318. if (! si->hStdError) {
  319. if (! DuplicateHandle(GetCurrentProcess(), GetStdHandle(STD_ERROR_HANDLE), GetCurrentProcess(), &si->hStdError, 0, true, DUPLICATE_SAME_ACCESS)) {
  320. log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_DUPLICATEHANDLE_FAILED, _T("STD_ERROR_HANDLE"), _T("stderr"), error_string(GetLastError()), 0);
  321. return 10;
  322. }
  323. }
  324. return 0;
  325. }
  326. void close_output_handles(STARTUPINFO *si) {
  327. if (si->hStdInput) CloseHandle(si->hStdInput);
  328. if (si->hStdOutput) CloseHandle(si->hStdOutput);
  329. if (si->hStdError) CloseHandle(si->hStdError);
  330. }
  331. /*
  332. Try multiple times to read from a file.
  333. Returns: 0 on success.
  334. 1 on non-fatal error.
  335. -1 on fatal error.
  336. */
  337. static int try_read(logger_t *logger, void *address, unsigned long bufsize, unsigned long *in, int *complained) {
  338. int ret = 1;
  339. unsigned long error;
  340. for (int tries = 0; tries < 5; tries++) {
  341. if (ReadFile(logger->read_handle, address, bufsize, in, 0)) return 0;
  342. error = GetLastError();
  343. switch (error) {
  344. /* Other end closed the pipe. */
  345. case ERROR_BROKEN_PIPE:
  346. ret = -1;
  347. goto complain_read;
  348. /* Couldn't lock the buffer. */
  349. case ERROR_NOT_ENOUGH_QUOTA:
  350. Sleep(2000 + tries * 3000);
  351. ret = 1;
  352. continue;
  353. /* Write was cancelled by the other end. */
  354. case ERROR_OPERATION_ABORTED:
  355. ret = 1;
  356. goto complain_read;
  357. default:
  358. ret = -1;
  359. }
  360. }
  361. complain_read:
  362. /* Ignore the error if we've been requested to exit anyway. */
  363. if (*logger->rotate_online != NSSM_ROTATE_ONLINE) return ret;
  364. if (! (*complained & COMPLAINED_READ)) log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_READFILE_FAILED, logger->service_name, logger->path, error_string(error), 0);
  365. *complained |= COMPLAINED_READ;
  366. return ret;
  367. }
  368. /*
  369. Try multiple times to write to a file.
  370. Returns: 0 on success.
  371. 1 on non-fatal error.
  372. -1 on fatal error.
  373. */
  374. static int try_write(logger_t *logger, void *address, unsigned long bufsize, unsigned long *out, int *complained) {
  375. int ret = 1;
  376. unsigned long error;
  377. for (int tries = 0; tries < 5; tries++) {
  378. if (WriteFile(logger->write_handle, address, bufsize, out, 0)) return 0;
  379. error = GetLastError();
  380. if (error == ERROR_IO_PENDING) {
  381. /* Operation was successful pending flush to disk. */
  382. return 0;
  383. }
  384. switch (error) {
  385. /* Other end closed the pipe. */
  386. case ERROR_BROKEN_PIPE:
  387. ret = -1;
  388. goto complain_write;
  389. /* Couldn't lock the buffer. */
  390. case ERROR_NOT_ENOUGH_QUOTA:
  391. /* Out of disk space. */
  392. case ERROR_DISK_FULL:
  393. Sleep(2000 + tries * 3000);
  394. ret = 1;
  395. continue;
  396. default:
  397. /* We'll lose this line but try to read and write subsequent ones. */
  398. ret = 1;
  399. }
  400. }
  401. complain_write:
  402. if (! (*complained & COMPLAINED_WRITE)) log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_WRITEFILE_FAILED, logger->service_name, logger->path, error_string(error), 0);
  403. *complained |= COMPLAINED_WRITE;
  404. return ret;
  405. }
  406. /* Wrapper to be called in a new thread for logging. */
  407. unsigned long WINAPI log_and_rotate(void *arg) {
  408. logger_t *logger = (logger_t *) arg;
  409. if (! logger) return 1;
  410. __int64 size;
  411. BY_HANDLE_FILE_INFORMATION info;
  412. /* Find initial file size. */
  413. if (! GetFileInformationByHandle(logger->write_handle, &info)) logger->size = 0LL;
  414. else {
  415. ULARGE_INTEGER l;
  416. l.HighPart = info.nFileSizeHigh;
  417. l.LowPart = info.nFileSizeLow;
  418. size = l.QuadPart;
  419. }
  420. char buffer[1024];
  421. void *address;
  422. unsigned long in, out;
  423. unsigned long charsize = 0;
  424. unsigned long error;
  425. int ret;
  426. int complained = 0;
  427. while (true) {
  428. /* Read data from the pipe. */
  429. address = &buffer;
  430. ret = try_read(logger, address, sizeof(buffer), &in, &complained);
  431. if (ret < 0) {
  432. CloseHandle(logger->read_handle);
  433. CloseHandle(logger->write_handle);
  434. HeapFree(GetProcessHeap(), 0, logger);
  435. return 2;
  436. }
  437. else if (ret) continue;
  438. if (*logger->rotate_online == NSSM_ROTATE_ONLINE_ASAP || (logger->size && size + (__int64) in >= logger->size)) {
  439. /* Look for newline. */
  440. unsigned long i;
  441. for (i = 0; i < in; i++) {
  442. if (buffer[i] == '\n') {
  443. if (! charsize) charsize = guess_charsize(address, in);
  444. i += charsize;
  445. /* Write up to the newline. */
  446. ret = try_write(logger, address, i, &out, &complained);
  447. if (ret < 0) {
  448. CloseHandle(logger->read_handle);
  449. CloseHandle(logger->write_handle);
  450. HeapFree(GetProcessHeap(), 0, logger);
  451. return 3;
  452. }
  453. size += (__int64) out;
  454. /* Rotate. */
  455. *logger->rotate_online = NSSM_ROTATE_ONLINE;
  456. TCHAR rotated[PATH_LENGTH];
  457. rotated_filename(logger->path, rotated, _countof(rotated), 0);
  458. /*
  459. Ideally we'd try the rename first then close the handle but
  460. MoveFile() will fail if the handle is still open so we must
  461. risk losing everything.
  462. */
  463. if (logger->copy_and_truncate) FlushFileBuffers(logger->write_handle);
  464. CloseHandle(logger->write_handle);
  465. bool ok = true;
  466. TCHAR *function;
  467. if (logger->copy_and_truncate) {
  468. function = _T("CopyFile()");
  469. if (CopyFile(logger->path, rotated, TRUE)) {
  470. HANDLE file = write_to_file(logger->path, NSSM_STDOUT_SHARING, 0, NSSM_STDOUT_DISPOSITION, NSSM_STDOUT_FLAGS);
  471. Sleep(logger->rotate_delay);
  472. SetFilePointer(file, 0, 0, FILE_BEGIN);
  473. SetEndOfFile(file);
  474. CloseHandle(file);
  475. }
  476. else ok = false;
  477. }
  478. else {
  479. function = _T("MoveFile()");
  480. if (! MoveFile(logger->path, rotated)) ok = false;
  481. }
  482. if (ok) {
  483. log_event(EVENTLOG_INFORMATION_TYPE, NSSM_EVENT_ROTATED, logger->service_name, logger->path, rotated, 0);
  484. size = 0LL;
  485. }
  486. else {
  487. error = GetLastError();
  488. if (error != ERROR_FILE_NOT_FOUND) {
  489. if (! (complained & COMPLAINED_ROTATE)) log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_ROTATE_FILE_FAILED, logger->service_name, logger->path, function, rotated, error_string(error), 0);
  490. complained |= COMPLAINED_ROTATE;
  491. /* We can at least try to re-open the existing file. */
  492. logger->disposition = OPEN_ALWAYS;
  493. }
  494. }
  495. /* Reopen. */
  496. logger->write_handle = write_to_file(logger->path, logger->sharing, 0, logger->disposition, logger->flags);
  497. if (! logger->write_handle) {
  498. error = GetLastError();
  499. log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_CREATEFILE_FAILED, logger->path, error_string(error), 0);
  500. /* Oh dear. Now we can't log anything further. */
  501. CloseHandle(logger->read_handle);
  502. CloseHandle(logger->write_handle);
  503. HeapFree(GetProcessHeap(), 0, logger);
  504. return 4;
  505. }
  506. /* Resume writing after the newline. */
  507. address = (void *) ((char *) address + i);
  508. in -= i;
  509. }
  510. }
  511. }
  512. if (! size) {
  513. /* Write a BOM to the new file. */
  514. if (! charsize) charsize = guess_charsize(address, in);
  515. if (charsize == sizeof(wchar_t)) write_bom(logger, &out);
  516. size += (__int64) out;
  517. }
  518. /* Write the data, if any. */
  519. if (! in) continue;
  520. ret = try_write(logger, address, in, &out, &complained);
  521. size += (__int64) out;
  522. if (ret < 0) {
  523. CloseHandle(logger->read_handle);
  524. CloseHandle(logger->write_handle);
  525. HeapFree(GetProcessHeap(), 0, logger);
  526. return 3;
  527. }
  528. }
  529. CloseHandle(logger->read_handle);
  530. CloseHandle(logger->write_handle);
  531. HeapFree(GetProcessHeap(), 0, logger);
  532. return 0;
  533. }