Query_log_event qinfo(thd, buff);
qinfo.q_len =
my_sprintf(buff,
(buff,"SET PASSWORD FOR \"%-.120s\"@\"%-.120s\"=\"%-.120s\"",
acl_user->user,
acl_user->host.hostname ? acl_user->host.hostname : "",
new_password));
mysql_update_log.write(thd,buff,qinfo.q_len);
mysql_bin_log.write(&qinfo);
return 0;
那个“%-.120s”是什么意思啊