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- #include "nssm.h"
- static HANDLE create_logging_thread(logger_t *logger) {
- HANDLE thread_handle = CreateThread(NULL, 0, log_and_rotate, (void *) logger, 0, logger->tid_ptr);
- if (! thread_handle) log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_CREATETHREAD_FAILED, error_string(GetLastError()), 0);
- return thread_handle;
- }
- static inline void write_bom(logger_t *logger) {
- wchar_t bom = L'\ufeff';
- unsigned long out;
- if (! WriteFile(logger->write_handle, (void *) &bom, sizeof(bom), &out, 0)) {
- log_event(EVENTLOG_WARNING_TYPE, NSSM_EVENT_SOMEBODY_SET_UP_US_THE_BOM, logger->service_name, logger->path, error_string(GetLastError()), 0);
- }
- }
- /* Get path, share mode, creation disposition and flags for a stream. */
- 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) {
- TCHAR value[NSSM_STDIO_LENGTH];
- /* Path. */
- if (_sntprintf_s(value, _countof(value), _TRUNCATE, _T("%s"), prefix) < 0) {
- log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_OUT_OF_MEMORY, prefix, _T("get_createfile_parameters()"), 0);
- return 1;
- }
- switch (expand_parameter(key, value, path, MAX_PATH, true, false)) {
- case 0: if (! path[0]) return 0; break; /* OK. */
- default: return 2; /* Error. */
- }
- /* ShareMode. */
- if (_sntprintf_s(value, _countof(value), _TRUNCATE, _T("%s%s"), prefix, NSSM_REG_STDIO_SHARING) < 0) {
- log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_OUT_OF_MEMORY, NSSM_REG_STDIO_SHARING, _T("get_createfile_parameters()"), 0);
- return 3;
- }
- switch (get_number(key, value, sharing, false)) {
- case 0: *sharing = default_sharing; break; /* Missing. */
- case 1: break; /* Found. */
- case -2: return 4; break; /* Error. */
- }
- /* CreationDisposition. */
- if (_sntprintf_s(value, _countof(value), _TRUNCATE, _T("%s%s"), prefix, NSSM_REG_STDIO_DISPOSITION) < 0) {
- log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_OUT_OF_MEMORY, NSSM_REG_STDIO_DISPOSITION, _T("get_createfile_parameters()"), 0);
- return 5;
- }
- switch (get_number(key, value, disposition, false)) {
- case 0: *disposition = default_disposition; break; /* Missing. */
- case 1: break; /* Found. */
- case -2: return 6; break; /* Error. */
- }
- /* Flags. */
- if (_sntprintf_s(value, _countof(value), _TRUNCATE, _T("%s%s"), prefix, NSSM_REG_STDIO_FLAGS) < 0) {
- log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_OUT_OF_MEMORY, NSSM_REG_STDIO_FLAGS, _T("get_createfile_parameters()"), 0);
- return 7;
- }
- switch (get_number(key, value, flags, false)) {
- case 0: *flags = default_flags; break; /* Missing. */
- case 1: break; /* Found. */
- case -2: return 8; break; /* Error. */
- }
- return 0;
- }
- int set_createfile_parameter(HKEY key, TCHAR *prefix, TCHAR *suffix, unsigned long number) {
- TCHAR value[NSSM_STDIO_LENGTH];
- if (_sntprintf_s(value, _countof(value), _TRUNCATE, _T("%s%s"), prefix, suffix) < 0) {
- log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_OUT_OF_MEMORY, suffix, _T("set_createfile_parameter()"), 0);
- return 1;
- }
- return set_number(key, value, number);
- }
- int delete_createfile_parameter(HKEY key, TCHAR *prefix, TCHAR *suffix) {
- TCHAR value[NSSM_STDIO_LENGTH];
- if (_sntprintf_s(value, _countof(value), _TRUNCATE, _T("%s%s"), prefix, suffix) < 0) {
- log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_OUT_OF_MEMORY, suffix, _T("delete_createfile_parameter()"), 0);
- return 1;
- }
- if (RegDeleteValue(key, value)) return 0;
- return 1;
- }
- HANDLE append_to_file(TCHAR *path, unsigned long sharing, SECURITY_ATTRIBUTES *attributes, unsigned long disposition, unsigned long flags) {
- HANDLE ret;
- /* Try to append to the file first. */
- ret = CreateFile(path, FILE_APPEND_DATA, sharing, attributes, disposition, flags, 0);
- if (ret) {
- SetEndOfFile(ret);
- return ret;
- }
- unsigned long error = GetLastError();
- if (error != ERROR_FILE_NOT_FOUND) {
- log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_CREATEFILE_FAILED, path, error_string(error), 0);
- return (HANDLE) 0;
- }
- /* It didn't exist. Create it. */
- return CreateFile(path, FILE_WRITE_DATA, sharing, attributes, disposition, flags, 0);
- }
- static void rotated_filename(TCHAR *path, TCHAR *rotated, unsigned long rotated_len, SYSTEMTIME *st) {
- if (! st) {
- SYSTEMTIME now;
- st = &now;
- GetSystemTime(st);
- }
- TCHAR buffer[MAX_PATH];
- memmove(buffer, path, sizeof(buffer));
- TCHAR *ext = PathFindExtension(buffer);
- TCHAR extension[MAX_PATH];
- _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);
- *ext = _T('\0');
- _sntprintf_s(rotated, rotated_len, _TRUNCATE, _T("%s%s"), buffer, extension);
- }
- void rotate_file(TCHAR *service_name, TCHAR *path, unsigned long seconds, unsigned long low, unsigned long high) {
- unsigned long error;
- /* Now. */
- SYSTEMTIME st;
- GetSystemTime(&st);
- BY_HANDLE_FILE_INFORMATION info;
- /* Try to open the file to check if it exists and to get attributes. */
- HANDLE file = CreateFile(path, 0, FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0);
- if (file) {
- /* Get file attributes. */
- if (! GetFileInformationByHandle(file, &info)) {
- /* Reuse current time for rotation timestamp. */
- seconds = low = high = 0;
- SystemTimeToFileTime(&st, &info.ftLastWriteTime);
- }
- CloseHandle(file);
- }
- else {
- error = GetLastError();
- if (error == ERROR_FILE_NOT_FOUND) return;
- log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_ROTATE_FILE_FAILED, service_name, path, _T("CreateFile()"), path, error_string(error), 0);
- /* Reuse current time for rotation timestamp. */
- seconds = low = high = 0;
- SystemTimeToFileTime(&st, &info.ftLastWriteTime);
- }
- /* Check file age. */
- if (seconds) {
- FILETIME ft;
- SystemTimeToFileTime(&st, &ft);
- ULARGE_INTEGER s;
- s.LowPart = ft.dwLowDateTime;
- s.HighPart = ft.dwHighDateTime;
- s.QuadPart -= seconds * 10000000LL;
- ft.dwLowDateTime = s.LowPart;
- ft.dwHighDateTime = s.HighPart;
- if (CompareFileTime(&info.ftLastWriteTime, &ft) > 0) return;
- }
- /* Check file size. */
- if (low || high) {
- if (info.nFileSizeHigh < high) return;
- if (info.nFileSizeHigh == high && info.nFileSizeLow < low) return;
- }
- /* Get new filename. */
- FileTimeToSystemTime(&info.ftLastWriteTime, &st);
- TCHAR rotated[MAX_PATH];
- rotated_filename(path, rotated, _countof(rotated), &st);
- /* Rotate. */
- if (MoveFile(path, rotated)) return;
- error = GetLastError();
- log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_ROTATE_FILE_FAILED, service_name, path, _T("MoveFile()"), rotated, error_string(error), 0);
- return;
- }
- int get_output_handles(nssm_service_t *service, HKEY key, STARTUPINFO *si) {
- bool set_flags = false;
- /* Standard security attributes allowing inheritance. */
- SECURITY_ATTRIBUTES attributes;
- ZeroMemory(&attributes, sizeof(attributes));
- attributes.bInheritHandle = true;
- /* stdin */
- if (get_createfile_parameters(key, NSSM_REG_STDIN, service->stdin_path, &service->stdin_sharing, NSSM_STDIN_SHARING, &service->stdin_disposition, NSSM_STDIN_DISPOSITION, &service->stdin_flags, NSSM_STDIN_FLAGS)) {
- service->stdin_sharing = service->stdin_disposition = service->stdin_flags = 0;
- ZeroMemory(service->stdin_path, _countof(service->stdin_path) * sizeof(TCHAR));
- return 1;
- }
- if (si && service->stdin_path[0]) {
- si->hStdInput = CreateFile(service->stdin_path, FILE_READ_DATA, service->stdin_sharing, &attributes, service->stdin_disposition, service->stdin_flags, 0);
- if (! si->hStdInput) {
- log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_CREATEFILE_FAILED, service->stdin_path, error_string(GetLastError()), 0);
- return 2;
- }
- set_flags = true;
- }
- ULARGE_INTEGER size;
- size.LowPart = service->rotate_bytes_low;
- size.HighPart = service->rotate_bytes_high;
- /* stdout */
- if (get_createfile_parameters(key, NSSM_REG_STDOUT, service->stdout_path, &service->stdout_sharing, NSSM_STDOUT_SHARING, &service->stdout_disposition, NSSM_STDOUT_DISPOSITION, &service->stdout_flags, NSSM_STDOUT_FLAGS)) {
- service->stdout_sharing = service->stdout_disposition = service->stdout_flags = 0;
- ZeroMemory(service->stdout_path, _countof(service->stdout_path) * sizeof(TCHAR));
- return 3;
- }
- if (si && service->stdout_path[0]) {
- if (service->rotate_files) rotate_file(service->name, service->stdout_path, service->rotate_seconds, service->rotate_bytes_low, service->rotate_bytes_high);
- HANDLE stdout_handle = append_to_file(service->stdout_path, service->stdout_sharing, 0, service->stdout_disposition, service->stdout_flags);
- if (! stdout_handle) {
- log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_CREATEFILE_FAILED, service->stdout_path, error_string(GetLastError()), 0);
- return 4;
- }
- /* Try online rotation only if a size threshold is set. */
- logger_t *stdout_logger = 0;
- if (service->rotate_files && service->rotate_stdout_online && size.QuadPart) {
- stdout_logger = (logger_t *) HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(logger_t));
- if (stdout_logger) {
- /* Pipe between application's stdout and our logging handle. */
- if (CreatePipe(&service->stdout_pipe, &si->hStdOutput, &attributes, 0)) {
- stdout_logger->service_name = service->name;
- stdout_logger->path = service->stdout_path;
- stdout_logger->sharing = service->stdout_sharing;
- stdout_logger->disposition = service->stdout_disposition;
- stdout_logger->flags = service->stdout_flags;
- stdout_logger->read_handle = service->stdout_pipe;
- stdout_logger->write_handle = stdout_handle;
- stdout_logger->size = (__int64) size.QuadPart;
- stdout_logger->tid_ptr = &service->stdout_tid;
- /* Logging thread. */
- service->stdout_thread = create_logging_thread(stdout_logger);
- if (! service->stdout_thread) {
- log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_CREATEPIPE_FAILED, service->name, service->stdout_path, error_string(GetLastError()));
- CloseHandle(service->stdout_pipe);
- CloseHandle(si->hStdOutput);
- service->stdout_tid = 0;
- }
- }
- else service->stdout_tid = 0;
- }
- else {
- log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_OUT_OF_MEMORY, _T("stdout_logger"), _T("get_output_handles()"), 0);
- service->stdout_tid = 0;
- }
- /* Fall through to try direct I/O. */
- if (! service->stdout_tid) log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_CREATEPIPE_FAILED, service->name, service->stdout_path, error_string(GetLastError()));
- }
- if (! service->stdout_tid) {
- if (stdout_logger) HeapFree(GetProcessHeap(), 0, stdout_logger);
- if (! DuplicateHandle(GetCurrentProcess(), stdout_handle, GetCurrentProcess(), &si->hStdOutput, 0, true, DUPLICATE_CLOSE_SOURCE | DUPLICATE_SAME_ACCESS)) {
- log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_DUPLICATEHANDLE_FAILED, NSSM_REG_STDOUT, error_string(GetLastError()), 0);
- return 4;
- }
- service->rotate_stdout_online = false;
- }
- set_flags = true;
- }
- /* stderr */
- if (get_createfile_parameters(key, NSSM_REG_STDERR, service->stderr_path, &service->stdout_sharing, NSSM_STDERR_SHARING, &service->stdout_disposition, NSSM_STDERR_DISPOSITION, &service->stdout_flags, NSSM_STDERR_FLAGS)) {
- service->stderr_sharing = service->stderr_disposition = service->stderr_flags = 0;
- ZeroMemory(service->stderr_path, _countof(service->stderr_path) * sizeof(TCHAR));
- return 5;
- }
- if (service->stderr_path[0]) {
- /* Same as stdout? */
- if (str_equiv(service->stderr_path, service->stdout_path)) {
- service->stderr_sharing = service->stdout_sharing;
- service->stderr_disposition = service->stdout_disposition;
- service->stderr_flags = service->stdout_flags;
- service->rotate_stderr_online = false;
- if (si) {
- /* Two handles to the same file will create a race. */
- if (! DuplicateHandle(GetCurrentProcess(), si->hStdOutput, GetCurrentProcess(), &si->hStdError, 0, true, DUPLICATE_SAME_ACCESS)) {
- log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_DUPLICATEHANDLE_FAILED, NSSM_REG_STDOUT, error_string(GetLastError()), 0);
- return 6;
- }
- }
- }
- else if (si) {
- if (service->rotate_files) rotate_file(service->name, service->stderr_path, service->rotate_seconds, service->rotate_bytes_low, service->rotate_bytes_high);
- HANDLE stderr_handle = append_to_file(service->stderr_path, service->stdout_sharing, 0, service->stdout_disposition, service->stdout_flags);
- if (! stderr_handle) {
- log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_CREATEFILE_FAILED, service->stderr_path, error_string(GetLastError()), 0);
- return 7;
- }
- /* Try online rotation only if a size threshold is set. */
- logger_t *stderr_logger = 0;
- if (service->rotate_files && service->rotate_stderr_online && size.QuadPart) {
- stderr_logger = (logger_t *) HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(logger_t));
- if (stderr_logger) {
- /* Pipe between application's stderr and our logging handle. */
- if (CreatePipe(&service->stderr_pipe, &si->hStdError, &attributes, 0)) {
- stderr_logger->service_name = service->name;
- stderr_logger->path = service->stderr_path;
- stderr_logger->sharing = service->stderr_sharing;
- stderr_logger->disposition = service->stderr_disposition;
- stderr_logger->flags = service->stderr_flags;
- stderr_logger->read_handle = service->stderr_pipe;
- stderr_logger->write_handle = stderr_handle;
- stderr_logger->size = (__int64) size.QuadPart;
- stderr_logger->tid_ptr = &service->stderr_tid;
- /* Logging thread. */
- service->stderr_thread = create_logging_thread(stderr_logger);
- if (! service->stderr_thread) {
- log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_CREATEPIPE_FAILED, service->name, service->stderr_path, error_string(GetLastError()));
- CloseHandle(service->stderr_pipe);
- CloseHandle(si->hStdError);
- service->stderr_tid = 0;
- }
- }
- else service->stderr_tid = 0;
- }
- else {
- log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_OUT_OF_MEMORY, _T("stderr_logger"), _T("get_output_handles()"), 0);
- service->stderr_tid = 0;
- }
- /* Fall through to try direct I/O. */
- if (! service->stderr_tid) log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_CREATEPIPE_FAILED, service->name, service->stderr_path, error_string(GetLastError()));
- }
- if (! service->stderr_tid) {
- if (stderr_logger) HeapFree(GetProcessHeap(), 0, stderr_logger);
- if (! DuplicateHandle(GetCurrentProcess(), stderr_handle, GetCurrentProcess(), &si->hStdError, 0, true, DUPLICATE_CLOSE_SOURCE | DUPLICATE_SAME_ACCESS)) {
- log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_DUPLICATEHANDLE_FAILED, NSSM_REG_STDERR, error_string(GetLastError()), 0);
- return 7;
- }
- service->rotate_stderr_online = false;
- }
- }
- set_flags = true;
- }
- if (! set_flags) return 0;
- /*
- We need to set the startup_info flags to make the new handles
- inheritable by the new process.
- */
- if (si) si->dwFlags |= STARTF_USESTDHANDLES;
- return 0;
- }
- void close_output_handles(STARTUPINFO *si, bool close_stdout, bool close_stderr) {
- if (si->hStdInput) CloseHandle(si->hStdInput);
- if (si->hStdOutput && close_stdout) CloseHandle(si->hStdOutput);
- if (si->hStdError && close_stderr) CloseHandle(si->hStdError);
- }
- void close_output_handles(STARTUPINFO *si) {
- return close_output_handles(si, true, true);
- }
- /* Wrapper to be called in a new thread for logging. */
- unsigned long WINAPI log_and_rotate(void *arg) {
- logger_t *logger = (logger_t *) arg;
- if (! logger) return 1;
- __int64 size;
- BY_HANDLE_FILE_INFORMATION info;
- /* Find initial file size. */
- if (! GetFileInformationByHandle(logger->write_handle, &info)) logger->size = 0LL;
- else {
- ULARGE_INTEGER l;
- l.HighPart = info.nFileSizeHigh;
- l.LowPart = info.nFileSizeLow;
- size = l.QuadPart;
- }
- char buffer[80];
- void *address;
- unsigned long in, out;
- while (true) {
- /* Read data from the pipe. */
- address = &buffer;
- if (! ReadFile(logger->read_handle, address, sizeof(buffer), &in, 0)) {
- log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_READFILE_FAILED, logger->service_name, logger->path, error_string(GetLastError()), 0);
- return 2;
- }
- if (size + (__int64) in >= logger->size) {
- /* Look for newline. */
- unsigned long i;
- for (i = 0; i < in; i++) {
- if (buffer[i] == '\n') {
- unsigned char unicode = IsTextUnicode(address, sizeof(buffer), 0);
- if (unicode) i += sizeof(wchar_t);
- else i += sizeof(char);
- /* Write up to the newline. */
- if (! WriteFile(logger->write_handle, address, i, &out, 0)) {
- log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_WRITEFILE_FAILED, logger->service_name, logger->path, error_string(GetLastError()), 0);
- return 3;
- }
- /* Rotate. */
- TCHAR rotated[MAX_PATH];
- rotated_filename(logger->path, rotated, _countof(rotated), 0);
- /*
- Ideally we'd try the rename first then close the handle but
- MoveFile() will fail if the handle is still open so we must
- risk losing everything.
- */
- CloseHandle(logger->write_handle);
- if (! MoveFile(logger->path, rotated)) {
- unsigned long error = GetLastError();
- if (error != ERROR_FILE_NOT_FOUND) {
- log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_ROTATE_FILE_FAILED, logger->service_name, logger->path, _T("MoveFile()"), rotated, error_string(error), 0);
- /* We can at least try to re-open the existing file. */
- logger->disposition = OPEN_ALWAYS;
- }
- }
- /* Reopen. */
- logger->write_handle = append_to_file(logger->path, logger->sharing, 0, logger->disposition, logger->flags);
- if (! logger->write_handle) {
- log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_CREATEFILE_FAILED, logger->path, error_string(GetLastError()), 0);
- /* Oh dear. Now we can't log anything further. */
- return 4;
- }
- /* Unicode files need a new BOM. */
- if (unicode) write_bom(logger);
- /* Resume writing after the newline. */
- size = 0LL;
- address = (void *) ((char *) address + i);
- in -= i;
- break;
- }
- }
- }
- else if (! size) {
- /* Write a BOM to the new file. */
- if (IsTextUnicode(address, sizeof(buffer), 0)) write_bom(logger);
- }
- /* Write the data. */
- if (! WriteFile(logger->write_handle, address, in, &out, 0)) {
- log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_WRITEFILE_FAILED, logger->service_name, logger->path, error_string(GetLastError()), 0);
- return 3;
- }
- size += (__int64) out;
- }
- return 0;
- }
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