extern int _lseek(int file, int offset, int whence)
{
int position;
int result;
vm_fs_seek(file, offset, whence + 1);
result = vm_fs_get_position(file, &position);
LOG("_lseek(%d, %d, %d) - %d\n", file, offset, whence, position);
return position;
}
/* The callback to be invoked by the system engine. */
void handle_sysevt(VMINT message, VMINT param) {
switch (message) {
case VM_EVENT_CREATE:
break;
case VM_EVENT_PAINT: {
VMWCHAR path[100];
VMINT fs = 0;
VMCHAR flag = 0;
VMCHAR write = 'a';
VMINT write_size = 0;
VMINT ret = 0;
/* This file is a flag to not update the firmware after the firmware was updated and the board reboots.
It's to prevent calling the update API in an endless loop. */
vm_chset_ascii_to_ucs2(path, 100, "c:\\firmware.txt");
fs = vm_fs_open(path,VM_FS_MODE_READ,FALSE);
if(fs<0) {
fs = vm_fs_open(path,VM_FS_MODE_CREATE_ALWAYS_WRITE,FALSE);
}
if(fs>=0) {
vm_fs_read(fs,(void *)&flag,sizeof(VMCHAR),&write_size);
if(flag==0) {
vm_fs_seek(fs,0,VM_FS_BASE_BEGINNING);
vm_fs_write(fs,(void *)&write,sizeof(VMCHAR),&write_size);
}
vm_fs_close(fs);
if(flag=='a') {
vm_log_info("firmware:have firmware update");
ret = firmware_read_update_status();
vm_log_info("firmware:update result = %d ",ret);
vm_fs_delete(path);
}
if(flag==0) {
vm_log_info("firmware update begin");
vm_firmware_trigger_update();
vm_log_info("firmware update end");
vm_pwr_reboot();
}
}
}
break;
default:
break;
}
}
VMBOOL read_conf_string(VMSTR variable_name, VMSTR output_buffer, VMUINT output_buffer_size) {
VMINT res;
VMUINT conf_size;
VMUINT bytes_read;
VMSTR conf_data;
VMSTR key;
VMSTR value;
VMBOOL result_string_valid = FALSE;
if (conf_handle_valid)
{
res = vm_fs_get_size(conf_handle, &conf_size);
if (VM_IS_SUCCEEDED(res))
{
conf_data = vm_calloc(conf_size + strlen(conf_defaults) + 1);
if (conf_data != NULL)
{
vm_fs_seek(conf_handle, 0, VM_FS_BASE_BEGINNING);
res = vm_fs_read(conf_handle, conf_data, conf_size, &bytes_read);
if (VM_IS_SUCCEEDED(res))
{
strcat(conf_data, conf_defaults);
key = strtok(conf_data, "=");
while (key != NULL)
{
value = strtok(NULL, "\n");
if (value != NULL && strcmp(variable_name, key) == 0 && strlen(value) < output_buffer_size)
{
strcpy(output_buffer, value);
result_string_valid = TRUE;
break;
}
key = strtok(NULL, "=");
}
}
vm_free(conf_data);
}
}
}
return result_string_valid;
}