Function elog_read

util/cbfstool/elogtool.c:85–104

* If filename is empty, read RW_ELOG from flashrom. * Otherwise read the RW_ELOG from a file. * It fails if the ELOG header is invalid. * On success, buffer must be freed by caller. */

 * On success, buffer must be freed by caller.
 */
static int elog_read(struct buffer *buffer, const char *filename)
{
	if (filename == NULL) {
		if (flashrom_host_read(buffer, ELOG_RW_REGION_NAME) != 0) {
			fprintf(stderr, "Could not read RW_ELOG region using flashrom\n");
			return ELOGTOOL_EXIT_READ_ERROR;
		}
	} else if (buffer_from_file(buffer, filename) != 0) {
		fprintf(stderr, "Could not read input file: %s\n", filename);
		return ELOGTOOL_EXIT_READ_ERROR;
	}

	if (elog_verify_header(buffer_get(buffer)) != CB_SUCCESS) {
		fprintf(stderr, "FATAL: Invalid elog header\n");
		buffer_delete(buffer);
		return ELOGTOOL_EXIT_INVALID_ELOG_FORMAT;
	}

	return ELOGTOOL_EXIT_SUCCESS;
}

/*
 * If filename is NULL, it saves the buffer using flashrom.