/*
start writing to a new log file
*/
uint16_t DataFlash_File::start_new_log(void)
{
stop_logging();
if (_read_fd != -1) {
::close(_read_fd);
_read_fd = -1;
}
uint16_t log_num = find_last_log();
// re-use empty logs if possible
if (_get_log_size(log_num) > 0 || log_num == 0) {
log_num++;
}
if (log_num > MAX_LOG_FILES) {
log_num = 1;
}
char *fname = _log_file_name(log_num);
_write_fd = ::open(fname, O_WRONLY|O_CREAT|O_TRUNC, 0666);
free(fname);
if (_write_fd == -1) {
_initialised = false;
return 0xFFFF;
}
// now update lastlog.txt with the new log number
fname = _lastlog_file_name();
FILE *f = ::fopen(fname, "w");
fprintf(f, "%u\n", (unsigned)log_num);
fclose(f);
free(fname);
return log_num;
}
/*
list available log numbers
*/
void DataFlash_File::ListAvailableLogs(AP_HAL::BetterStream *port)
{
uint16_t num_logs = get_num_logs();
int16_t last_log_num = find_last_log();
if (num_logs == 0) {
port->printf_P(PSTR("\nNo logs\n\n"));
return;
}
port->printf_P(PSTR("\n%u logs\n"), (unsigned)num_logs);
for (uint16_t i=num_logs; i>=1; i--) {
uint16_t log_num = last_log_num - i + 1;
off_t size;
char *filename = _log_file_name(log_num);
if (filename != NULL) {
size = _get_log_size(log_num);
if (size != 0) {
port->printf_P(PSTR("Log %u in %s of size %u\n"),
(unsigned)log_num,
filename,
(unsigned)size);
}
free(filename);
}
}
port->println();
}
/*
get the number of logs - note that the log numbers must be consecutive
*/
uint16_t DataFlash_File::get_num_logs(void)
{
uint16_t ret;
uint16_t high = find_last_log();
for (ret=0; ret<high; ret++) {
if (_get_log_size(high - ret) <= 0) {
break;
}
}
return ret;
}
/*
start writing to a new log file
*/
uint16_t DataFlash_File::start_new_log(void)
{
stop_logging();
if (_open_error) {
// we have previously failed to open a file - don't try again
// to prevent us trying to open files while in flight
return 0xFFFF;
}
if (_read_fd != -1) {
::close(_read_fd);
_read_fd = -1;
}
uint16_t log_num = find_last_log();
// re-use empty logs if possible
if (_get_log_size(log_num) > 0 || log_num == 0) {
log_num++;
}
if (log_num > MAX_LOG_FILES) {
log_num = 1;
}
char *fname = _log_file_name(log_num);
_write_fd = ::open(fname, O_WRONLY|O_CREAT|O_TRUNC, 0666);
if (_write_fd == -1) {
_initialised = false;
_open_error = true;
int saved_errno = errno;
::printf("Log open fail for %s - %s\n",
fname, strerror(saved_errno));
hal.console->printf("Log open fail for %s - %s\n",
fname, strerror(saved_errno));
free(fname);
return 0xFFFF;
}
free(fname);
_write_offset = 0;
_writebuf_head = 0;
_writebuf_tail = 0;
log_write_started = true;
// now update lastlog.txt with the new log number
fname = _lastlog_file_name();
FILE *f = ::fopen(fname, "w");
fprintf(f, "%u\r\n", (unsigned)log_num);
fclose(f);
free(fname);
return log_num;
}
/*
list available log numbers
*/
void DataFlash_File::ListAvailableLogs(AP_HAL::BetterStream *port)
{
uint16_t num_logs = get_num_logs();
int16_t last_log_num = find_last_log();
if (num_logs == 0) {
port->printf_P(PSTR("\nNo logs\n\n"));
return;
}
port->printf_P(PSTR("\n%u logs\n"), (unsigned)num_logs);
for (uint16_t i=num_logs; i>=1; i--) {
uint16_t log_num = last_log_num - i + 1;
off_t size;
char *filename = _log_file_name(log_num);
if (filename != NULL) {
size = _get_log_size(log_num);
if (size != 0) {
struct stat st;
if (stat(filename, &st) == 0) {
struct tm *tm = gmtime(&st.st_mtime);
port->printf_P(PSTR("Log %u in %s of size %u %u/%u/%u %u:%u\n"),
(unsigned)log_num,
filename,
(unsigned)size,
(unsigned)tm->tm_year+1900,
(unsigned)tm->tm_mon+1,
(unsigned)tm->tm_mday,
(unsigned)tm->tm_hour,
(unsigned)tm->tm_min);
}
}
free(filename);
}
}
port->println();
}
/*
find size and date of a log
*/
void DataFlash_File::get_log_info(uint16_t log_num, uint32_t &size, uint32_t &time_utc)
{
size = _get_log_size(log_num);
time_utc = _get_log_time(log_num);
}
/*
find the number of pages in a log
*/
void DataFlash_File::get_log_boundaries(uint16_t log_num, uint16_t & start_page, uint16_t & end_page)
{
start_page = 0;
end_page = _get_log_size(log_num) / DATAFLASH_PAGE_SIZE;
}
