/**
* @return 0 on success, 1 if all params have not yet been stored, -1 if device open failed, -2 if writing parameters failed
*/
int
param_load_default(void)
{
warnx("param_load_default\n");
int fd_load = PARAM_OPEN(param_get_default_file(), O_RDONLY);
if (fd_load < 0) {
/* no parameter file is OK, otherwise this is an error */
if (errno != ENOENT) {
warn("open '%s' for reading failed", param_get_default_file());
return -1;
}
return 1;
}
int result = param_load(fd_load);
PARAM_CLOSE(fd_load);
if (result != 0) {
warn("error reading parameters from '%s'", param_get_default_file());
return -2;
}
return 0;
}
int
param_save_default(void)
{
int res;
int fd;
const char *filename = param_get_default_file();
/* write parameters to temp file */
fd = PARAM_OPEN(filename, O_WRONLY | O_CREAT, PX4_O_MODE_666);
if (fd < 0) {
warn("failed to open param file: %s", filename);
return ERROR;
}
res = param_export(fd, false);
if (res != OK) {
warnx("failed to write parameters to file: %s", filename);
}
PARAM_CLOSE(fd);
return res;
}
/**
* @return 0 on success, 1 if all params have not yet been stored, -1 if device open failed, -2 if writing parameters failed
*/
int
param_load_default(void)
{
int res = 0;
#if !defined(FLASH_BASED_PARAMS)
int fd_load = PARAM_OPEN(param_get_default_file(), O_RDONLY);
if (fd_load < 0) {
/* no parameter file is OK, otherwise this is an error */
if (errno != ENOENT) {
warn("open '%s' for reading failed", param_get_default_file());
return -1;
}
return 1;
}
int result = param_load(fd_load);
PARAM_CLOSE(fd_load);
if (result != 0) {
warn("error reading parameters from '%s'", param_get_default_file());
return -2;
}
#else
// no need for locking
res = flash_param_load();
#endif
return res;
}
int
param_save_default(void)
{
int res = OK;
int fd = -1;
bool is_locked = false;
const char *filename = param_get_default_file();
if (get_shmem_lock(__FILE__, __LINE__) != 0) {
PX4_ERR("Could not get shmem lock\n");
res = ERROR;
goto exit;
}
is_locked = true;
fd = PARAM_OPEN(filename, O_WRONLY | O_CREAT, PX4_O_MODE_666);
if (fd < 0) {
PX4_ERR("failed to open param file: %s", filename);
goto exit;
}
res = param_export(fd, false);
if (res != OK) {
PX4_ERR("failed to write parameters to file: %s", filename);
goto exit;
}
PARAM_CLOSE(fd);
fd = -1;
exit:
if (is_locked) {
release_shmem_lock();
}
if (fd >= 0) {
close(fd);
}
if (res == OK) {
PX4_INFO("saving params completed successfully\n");
}
return res;
}
int
param_save_default(void)
{
int res = PX4_ERROR;
#if !defined(FLASH_BASED_PARAMS)
const char *filename = param_get_default_file();
/* write parameters to temp file */
int fd = PARAM_OPEN(filename, O_WRONLY | O_CREAT, PX4_O_MODE_666);
if (fd < 0) {
PX4_ERR("failed to open param file: %s", filename);
return ERROR;
}
int attempts = 5;
while (res != OK && attempts > 0) {
res = param_export(fd, false);
attempts--;
if (res != PX4_OK) {
PX4_ERR("param_export failed, retrying %d", attempts);
lseek(fd, 0, SEEK_SET); // jump back to the beginning of the file
}
}
if (res != OK) {
PX4_ERR("failed to write parameters to file: %s", filename);
}
PARAM_CLOSE(fd);
#else
param_lock_writer();
res = flash_param_save();
param_unlock_writer();
#endif
return res;
}
int
param_save_default(void)
{
int res;
#if !defined(FLASH_BASED_PARAMS)
int fd;
const char *filename = param_get_default_file();
/* write parameters to temp file */
fd = PARAM_OPEN(filename, O_WRONLY | O_CREAT, PX4_O_MODE_666);
if (fd < 0) {
warn("failed to open param file: %s", filename);
return ERROR;
}
res = 1;
int attempts = 5;
while (res != OK && attempts > 0) {
res = param_export(fd, false);
attempts--;
}
if (res != OK) {
warnx("failed to write parameters to file: %s", filename);
}
PARAM_CLOSE(fd);
#else
res = flash_param_save();
#endif
return res;
}