Function cmd_clear

util/cbfstool/elogtool.c:228–251

* Clears the elog events from the given buffer, which is a valid RW_ELOG region. * A LOG_CLEAR event is appended. */

 * A LOG_CLEAR event is appended.
 */
static int cmd_clear(const struct buffer *buf,
		     enum elogtool_flag flags __maybe_unused)
{
	uint32_t used_data_size;
	struct buffer copy;

	/* Clone the buffer to avoid changing the offset of the original buffer */
	buffer_clone(&copy, buf);
	buffer_seek(&copy, sizeof(struct elog_header));

	/*
	 * Calculate the size of the "used" buffer, needed for ELOG_TYPE_LOG_CLEAR.
	 * Then overwrite the entire buffer with ELOG_TYPE_EOL.
	 * Finally insert a LOG_CLEAR event into the buffer.
	 */
	used_data_size = next_available_event_offset(&copy);
	memset(buffer_get(&copy), ELOG_TYPE_EOL, buffer_size(&copy));

	if (!eventlog_init_event(&copy, ELOG_TYPE_LOG_CLEAR,
				 &used_data_size, sizeof(used_data_size)))
		return ELOGTOOL_EXIT_NOT_ENOUGH_BUFFER_SPACE;

	return ELOGTOOL_EXIT_SUCCESS;
}

static void cmd_add_usage(void)
{