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nssm/io.cpp
DumplingMiku be6ec06872 "first commit"
2025-10-20 22:00:00 +08:00

738 lines
28 KiB
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#include "nssm.h"
#define COMPLAINED_READ (1 << 0)
#define COMPLAINED_WRITE (1 << 1)
#define COMPLAINED_ROTATE (1 << 2)
#define TIMESTAMP_FORMAT "%04u-%02u-%02u %02u:%02u:%02u.%03u: "
#define TIMESTAMP_LEN 25
static int dup_handle(HANDLE source_handle, HANDLE *dest_handle_ptr, TCHAR *source_description, TCHAR *dest_description, unsigned long flags) {
if (! dest_handle_ptr) return 1;
if (! DuplicateHandle(GetCurrentProcess(), source_handle, GetCurrentProcess(), dest_handle_ptr, 0, true, flags)) {
log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_DUPLICATEHANDLE_FAILED, source_description, dest_description, error_string(GetLastError()), 0);
return 2;
}
return 0;
}
static int dup_handle(HANDLE source_handle, HANDLE *dest_handle_ptr, TCHAR *source_description, TCHAR *dest_description) {
return dup_handle(source_handle, dest_handle_ptr, source_description, dest_description, DUPLICATE_SAME_ACCESS);
}
/*
read_handle: read from application
pipe_handle: stdout of application
write_handle: to file
*/
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 timestamp_log, bool copy_and_truncate) {
*tid_ptr = 0;
/* Pipe between application's stdout/stderr and our logging handle. */
if (read_handle_ptr && ! *read_handle_ptr) {
if (pipe_handle_ptr && ! *pipe_handle_ptr) {
if (CreatePipe(read_handle_ptr, pipe_handle_ptr, 0, 0)) {
SetHandleInformation(*pipe_handle_ptr, HANDLE_FLAG_INHERIT, HANDLE_FLAG_INHERIT);
}
else {
log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_CREATEPIPE_FAILED, service_name, path, error_string(GetLastError()));
return (HANDLE) 0;
}
}
}
logger_t *logger = (logger_t *) HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(logger_t));
if (! logger) {
log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_OUT_OF_MEMORY, _T("logger"), _T("create_logging_thread()"), 0);
return (HANDLE) 0;
}
ULARGE_INTEGER size;
size.LowPart = rotate_bytes_low;
size.HighPart = rotate_bytes_high;
logger->service_name = service_name;
logger->path = path;
logger->sharing = sharing;
logger->disposition = disposition;
logger->flags = flags;
logger->read_handle = *read_handle_ptr;
logger->write_handle = *write_handle_ptr;
logger->size = (__int64) size.QuadPart;
logger->tid_ptr = tid_ptr;
logger->timestamp_log = timestamp_log;
logger->line_length = 0;
logger->rotate_online = rotate_online;
logger->rotate_delay = rotate_delay;
logger->copy_and_truncate = copy_and_truncate;
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);
HeapFree(GetProcessHeap(), 0, logger);
}
return thread_handle;
}
static inline unsigned long guess_charsize(void *address, unsigned long bufsize) {
if (IsTextUnicode(address, bufsize, 0)) return (unsigned long) sizeof(wchar_t);
else return (unsigned long) sizeof(char);
}
static inline void write_bom(logger_t *logger, unsigned long *out) {
wchar_t bom = L'\ufeff';
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);
}
}
void close_handle(HANDLE *handle, HANDLE *remember) {
if (remember) *remember = INVALID_HANDLE_VALUE;
if (! handle) return;
if (! *handle) return;
CloseHandle(*handle);
if (remember) *remember = *handle;
*handle = 0;
}
void close_handle(HANDLE *handle) {
close_handle(handle, NULL);
}
/* 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, bool *copy_and_truncate) {
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, PATH_LENGTH, 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; /* 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; /* 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; /* Error. */
}
/* Rotate with CopyFile() and SetEndOfFile(). */
if (copy_and_truncate) {
unsigned long data;
if (_sntprintf_s(value, _countof(value), _TRUNCATE, _T("%s%s"), prefix, NSSM_REG_STDIO_COPY_AND_TRUNCATE) < 0) {
log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_OUT_OF_MEMORY, NSSM_REG_STDIO_COPY_AND_TRUNCATE, _T("get_createfile_parameters()"), 0);
return 9;
}
switch (get_number(key, value, &data, false)) {
case 0: *copy_and_truncate = false; break; /* Missing. */
case 1: /* Found. */
if (data) *copy_and_truncate = true;
else *copy_and_truncate = false;
break;
case -2: return 9; /* 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 write_to_file(TCHAR *path, unsigned long sharing, SECURITY_ATTRIBUTES *attributes, unsigned long disposition, unsigned long flags) {
static LARGE_INTEGER offset = { 0 };
HANDLE ret = CreateFile(path, FILE_WRITE_DATA, sharing, attributes, disposition, flags, 0);
if (ret != INVALID_HANDLE_VALUE) {
if (SetFilePointerEx(ret, offset, 0, FILE_END)) SetEndOfFile(ret);
return ret;
}
log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_CREATEFILE_FAILED, path, error_string(GetLastError()), 0);
return ret;
}
static void rotated_filename(TCHAR *path, TCHAR *rotated, unsigned long rotated_len, SYSTEMTIME *st) {
if (! st) {
SYSTEMTIME now;
st = &now;
GetSystemTime(st);
}
TCHAR buffer[PATH_LENGTH];
memmove(buffer, path, sizeof(buffer));
TCHAR *ext = PathFindExtension(buffer);
TCHAR extension[PATH_LENGTH];
_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 delay, unsigned long low, unsigned long high, bool copy_and_truncate) {
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 != INVALID_HANDLE_VALUE) {
/* 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[PATH_LENGTH];
rotated_filename(path, rotated, _countof(rotated), &st);
/* Rotate. */
bool ok = true;
TCHAR *function;
if (copy_and_truncate) {
function = _T("CopyFile()");
if (CopyFile(path, rotated, TRUE)) {
file = write_to_file(path, NSSM_STDOUT_SHARING, 0, NSSM_STDOUT_DISPOSITION, NSSM_STDOUT_FLAGS);
Sleep(delay);
SetFilePointer(file, 0, 0, FILE_BEGIN);
SetEndOfFile(file);
CloseHandle(file);
}
else ok = false;
}
else {
function = _T("MoveFile()");
if (! MoveFile(path, rotated)) ok = false;
}
if (ok) {
log_event(EVENTLOG_INFORMATION_TYPE, NSSM_EVENT_ROTATED, service_name, path, rotated, 0);
return;
}
error = GetLastError();
if (error == ERROR_FILE_NOT_FOUND) return;
log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_ROTATE_FILE_FAILED, service_name, path, function, rotated, error_string(error), 0);
return;
}
int get_output_handles(nssm_service_t *service, STARTUPINFO *si) {
if (! si) return 1;
bool inherit_handles = false;
/* Allocate a new console so we get a fresh stdin, stdout and stderr. */
alloc_console(service);
/* stdin */
if (service->stdin_path[0]) {
si->hStdInput = CreateFile(service->stdin_path, FILE_READ_DATA, service->stdin_sharing, 0, service->stdin_disposition, service->stdin_flags, 0);
if (si->hStdInput == INVALID_HANDLE_VALUE) {
log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_CREATEFILE_FAILED, service->stdin_path, error_string(GetLastError()), 0);
return 2;
}
inherit_handles = true;
}
/* stdout */
if (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, service->rotate_delay, service->stdout_copy_and_truncate);
HANDLE stdout_handle = write_to_file(service->stdout_path, service->stdout_sharing, 0, service->stdout_disposition, service->stdout_flags);
if (stdout_handle == INVALID_HANDLE_VALUE) return 4;
service->stdout_si = 0;
if (service->use_stdout_pipe) {
service->stdout_pipe = si->hStdOutput = 0;
service->stdout_thread = create_logging_thread(service->name, service->stdout_path, service->stdout_sharing, service->stdout_disposition, service->stdout_flags, &service->stdout_pipe, &service->stdout_si, &stdout_handle, service->rotate_bytes_low, service->rotate_bytes_high, service->rotate_delay, &service->stdout_tid, &service->rotate_stdout_online, service->timestamp_log, service->stdout_copy_and_truncate);
if (! service->stdout_thread) {
CloseHandle(service->stdout_pipe);
CloseHandle(service->stdout_si);
}
}
else service->stdout_thread = 0;
if (! service->stdout_thread) {
if (dup_handle(stdout_handle, &service->stdout_si, NSSM_REG_STDOUT, _T("stdout"), DUPLICATE_CLOSE_SOURCE | DUPLICATE_SAME_ACCESS)) return 4;
service->rotate_stdout_online = NSSM_ROTATE_OFFLINE;
}
if (dup_handle(service->stdout_si, &si->hStdOutput, _T("stdout_si"), _T("stdout"))) close_handle(&service->stdout_thread);
inherit_handles = true;
}
/* stderr */
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 = NSSM_ROTATE_OFFLINE;
/* Two handles to the same file will create a race. */
/* XXX: Here we assume that either both or neither handle must be a pipe. */
if (dup_handle(service->stdout_si, &service->stderr_si, _T("stdout"), _T("stderr"))) return 6;
}
else {
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);
HANDLE stderr_handle = write_to_file(service->stderr_path, service->stderr_sharing, 0, service->stderr_disposition, service->stderr_flags);
if (stderr_handle == INVALID_HANDLE_VALUE) return 7;
service->stderr_si = 0;
if (service->use_stderr_pipe) {
service->stderr_pipe = si->hStdError = 0;
service->stderr_thread = create_logging_thread(service->name, service->stderr_path, service->stderr_sharing, service->stderr_disposition, service->stderr_flags, &service->stderr_pipe, &service->stderr_si, &stderr_handle, service->rotate_bytes_low, service->rotate_bytes_high, service->rotate_delay, &service->stderr_tid, &service->rotate_stderr_online, service->timestamp_log, service->stderr_copy_and_truncate);
if (! service->stderr_thread) {
CloseHandle(service->stderr_pipe);
CloseHandle(service->stderr_si);
}
}
else service->stderr_thread = 0;
if (! service->stderr_thread) {
if (dup_handle(stderr_handle, &service->stderr_si, NSSM_REG_STDERR, _T("stderr"), DUPLICATE_CLOSE_SOURCE | DUPLICATE_SAME_ACCESS)) return 7;
service->rotate_stderr_online = NSSM_ROTATE_OFFLINE;
}
}
if (dup_handle(service->stderr_si, &si->hStdError, _T("stderr_si"), _T("stderr"))) close_handle(&service->stderr_thread);
inherit_handles = true;
}
/*
We need to set the startup_info flags to make the new handles
inheritable by the new process.
*/
if (inherit_handles) si->dwFlags |= STARTF_USESTDHANDLES;
return 0;
}
/* Reuse output handles for a hook. */
int use_output_handles(nssm_service_t *service, STARTUPINFO *si) {
si->dwFlags &= ~STARTF_USESTDHANDLES;
if (service->stdout_si) {
if (dup_handle(service->stdout_si, &si->hStdOutput, _T("stdout_pipe"), _T("hStdOutput"))) return 1;
si->dwFlags |= STARTF_USESTDHANDLES;
}
if (service->stderr_si) {
if (dup_handle(service->stderr_si, &si->hStdError, _T("stderr_pipe"), _T("hStdError"))) {
if (si->hStdOutput) {
si->dwFlags &= ~STARTF_USESTDHANDLES;
CloseHandle(si->hStdOutput);
}
return 2;
}
si->dwFlags |= STARTF_USESTDHANDLES;
}
return 0;
}
void close_output_handles(STARTUPINFO *si) {
if (si->hStdInput) CloseHandle(si->hStdInput);
if (si->hStdOutput) CloseHandle(si->hStdOutput);
if (si->hStdError) CloseHandle(si->hStdError);
}
void cleanup_loggers(nssm_service_t *service) {
unsigned long interval = NSSM_CLEANUP_LOGGERS_DEADLINE;
HANDLE thread_handle = INVALID_HANDLE_VALUE;
close_handle(&service->stdout_thread, &thread_handle);
/* Close write end of the data pipe so logging thread can finalise read. */
close_handle(&service->stdout_si);
/* Await logging thread then close read end. */
if (thread_handle != INVALID_HANDLE_VALUE) WaitForSingleObject(thread_handle, interval);
close_handle(&service->stdout_pipe);
thread_handle = INVALID_HANDLE_VALUE;
close_handle(&service->stderr_thread, &thread_handle);
close_handle(&service->stderr_si);
if (thread_handle != INVALID_HANDLE_VALUE) WaitForSingleObject(thread_handle, interval);
close_handle(&service->stderr_pipe);
}
/*
Try multiple times to read from a file.
Returns: 0 on success.
1 on non-fatal error.
-1 on fatal error.
*/
static int try_read(logger_t *logger, void *address, unsigned long bufsize, unsigned long *in, int *complained) {
int ret = 1;
unsigned long error;
for (int tries = 0; tries < 5; tries++) {
if (ReadFile(logger->read_handle, address, bufsize, in, 0)) return 0;
error = GetLastError();
switch (error) {
/* Other end closed the pipe. */
case ERROR_BROKEN_PIPE:
ret = -1;
goto complain_read;
/* Couldn't lock the buffer. */
case ERROR_NOT_ENOUGH_QUOTA:
Sleep(2000 + tries * 3000);
ret = 1;
continue;
/* Write was cancelled by the other end. */
case ERROR_OPERATION_ABORTED:
ret = 1;
goto complain_read;
default:
ret = -1;
}
}
complain_read:
/* Ignore the error if we've been requested to exit anyway. */
if (*logger->rotate_online != NSSM_ROTATE_ONLINE) return ret;
if (! (*complained & COMPLAINED_READ)) log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_READFILE_FAILED, logger->service_name, logger->path, error_string(error), 0);
*complained |= COMPLAINED_READ;
return ret;
}
/*
Try multiple times to write to a file.
Returns: 0 on success.
1 on non-fatal error.
-1 on fatal error.
*/
static int try_write(logger_t *logger, void *address, unsigned long bufsize, unsigned long *out, int *complained) {
int ret = 1;
unsigned long error;
for (int tries = 0; tries < 5; tries++) {
if (WriteFile(logger->write_handle, address, bufsize, out, 0)) return 0;
error = GetLastError();
if (error == ERROR_IO_PENDING) {
/* Operation was successful pending flush to disk. */
return 0;
}
switch (error) {
/* Other end closed the pipe. */
case ERROR_BROKEN_PIPE:
ret = -1;
goto complain_write;
/* Couldn't lock the buffer. */
case ERROR_NOT_ENOUGH_QUOTA:
/* Out of disk space. */
case ERROR_DISK_FULL:
Sleep(2000 + tries * 3000);
ret = 1;
continue;
default:
/* We'll lose this line but try to read and write subsequent ones. */
ret = 1;
}
}
complain_write:
if (! (*complained & COMPLAINED_WRITE)) log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_WRITEFILE_FAILED, logger->service_name, logger->path, error_string(error), 0);
*complained |= COMPLAINED_WRITE;
return ret;
}
/* Note that the timestamp is created in UTF-8. */
static inline int write_timestamp(logger_t *logger, unsigned long charsize, unsigned long *out, int *complained) {
char timestamp[TIMESTAMP_LEN + 1];
SYSTEMTIME now;
GetSystemTime(&now);
_snprintf_s(timestamp, _countof(timestamp), _TRUNCATE, TIMESTAMP_FORMAT, now.wYear, now.wMonth, now.wDay, now.wHour, now.wMinute, now.wSecond, now.wMilliseconds);
if (charsize == sizeof(char)) return try_write(logger, (void *) timestamp, TIMESTAMP_LEN, out, complained);
wchar_t *utf16;
unsigned long utf16len;
if (to_utf16(timestamp, &utf16, &utf16len)) return -1;
int ret = try_write(logger, (void *) *utf16, utf16len * sizeof(wchar_t), out, complained);
HeapFree(GetProcessHeap(), 0, utf16);
return ret;
}
static int write_with_timestamp(logger_t *logger, void *address, unsigned long bufsize, unsigned long *out, int *complained, unsigned long charsize) {
if (logger->timestamp_log) {
unsigned long log_out;
int log_complained;
unsigned long timestamp_out = 0;
int timestamp_complained;
if (! logger->line_length) {
write_timestamp(logger, charsize, &timestamp_out, &timestamp_complained);
logger->line_length += (__int64) timestamp_out;
*out += timestamp_out;
*complained |= timestamp_complained;
}
unsigned long i;
void *line = address;
unsigned long offset = 0;
int ret;
for (i = 0; i < bufsize; i++) {
if (((char *) address)[i] == '\n') {
ret = try_write(logger, line, i - offset + 1, &log_out, &log_complained);
line = (void *) ((char *) line + i - offset + 1);
logger->line_length = 0LL;
*out += log_out;
*complained |= log_complained;
offset = i + 1;
if (offset < bufsize) {
write_timestamp(logger, charsize, &timestamp_out, &timestamp_complained);
logger->line_length += (__int64) timestamp_out;
*out += timestamp_out;
*complained |= timestamp_complained;
}
}
}
if (offset < bufsize) {
ret = try_write(logger, line, bufsize - offset, &log_out, &log_complained);
*out += log_out;
*complained |= log_complained;
}
return ret;
}
else return try_write(logger, address, bufsize, out, complained);
}
/* 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[1024];
void *address;
unsigned long in, out;
unsigned long charsize = 0;
unsigned long error;
int ret;
int complained = 0;
while (true) {
/* Read data from the pipe. */
address = &buffer;
ret = try_read(logger, address, sizeof(buffer), &in, &complained);
if (ret < 0) {
close_handle(&logger->read_handle);
close_handle(&logger->write_handle);
HeapFree(GetProcessHeap(), 0, logger);
return 2;
}
else if (ret) continue;
if (*logger->rotate_online == NSSM_ROTATE_ONLINE_ASAP || (logger->size && size + (__int64) in >= logger->size)) {
/* Look for newline. */
unsigned long i;
for (i = 0; i < in; i++) {
if (buffer[i] == '\n') {
if (! charsize) charsize = guess_charsize(address, in);
i += charsize;
/* Write up to the newline. */
ret = try_write(logger, address, i, &out, &complained);
if (ret < 0) {
close_handle(&logger->read_handle);
close_handle(&logger->write_handle);
HeapFree(GetProcessHeap(), 0, logger);
return 3;
}
size += (__int64) out;
/* Rotate. */
*logger->rotate_online = NSSM_ROTATE_ONLINE;
TCHAR rotated[PATH_LENGTH];
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.
*/
if (logger->copy_and_truncate) FlushFileBuffers(logger->write_handle);
close_handle(&logger->write_handle);
bool ok = true;
TCHAR *function;
if (logger->copy_and_truncate) {
function = _T("CopyFile()");
if (CopyFile(logger->path, rotated, TRUE)) {
HANDLE file = write_to_file(logger->path, NSSM_STDOUT_SHARING, 0, NSSM_STDOUT_DISPOSITION, NSSM_STDOUT_FLAGS);
Sleep(logger->rotate_delay);
SetFilePointer(file, 0, 0, FILE_BEGIN);
SetEndOfFile(file);
CloseHandle(file);
}
else ok = false;
}
else {
function = _T("MoveFile()");
if (! MoveFile(logger->path, rotated)) ok = false;
}
if (ok) {
log_event(EVENTLOG_INFORMATION_TYPE, NSSM_EVENT_ROTATED, logger->service_name, logger->path, rotated, 0);
size = 0LL;
}
else {
error = GetLastError();
if (error != ERROR_FILE_NOT_FOUND) {
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);
complained |= COMPLAINED_ROTATE;
/* We can at least try to re-open the existing file. */
logger->disposition = OPEN_ALWAYS;
}
}
/* Reopen. */
logger->write_handle = write_to_file(logger->path, logger->sharing, 0, logger->disposition, logger->flags);
if (logger->write_handle == INVALID_HANDLE_VALUE) {
error = GetLastError();
log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_CREATEFILE_FAILED, logger->path, error_string(error), 0);
/* Oh dear. Now we can't log anything further. */
close_handle(&logger->read_handle);
close_handle(&logger->write_handle);
HeapFree(GetProcessHeap(), 0, logger);
return 4;
}
/* Resume writing after the newline. */
address = (void *) ((char *) address + i);
in -= i;
}
}
}
if (! size || logger->timestamp_log) if (! charsize) charsize = guess_charsize(address, in);
if (! size) {
/* Write a BOM to the new file. */
if (charsize == sizeof(wchar_t)) write_bom(logger, &out);
size += (__int64) out;
}
/* Write the data, if any. */
if (! in) continue;
ret = write_with_timestamp(logger, address, in, &out, &complained, charsize);
size += (__int64) out;
if (ret < 0) {
close_handle(&logger->read_handle);
close_handle(&logger->write_handle);
HeapFree(GetProcessHeap(), 0, logger);
return 3;
}
}
close_handle(&logger->read_handle);
close_handle(&logger->write_handle);
HeapFree(GetProcessHeap(), 0, logger);
return 0;
}
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