Your write call is interrupted before your program accesses an invalid address and gets killed by the SIGBUS signal. 这样,在write调用访问非法内存地址、并被随后接收到的SIGBUS信号杀死之前,write系统调用就被RTSIGNALLEASE信号中断了。
In the call treatment program, the status step method resolves the problem of the multiplicity of call signal acquisition and processing, and the time dispatch technique solves the difficulty of real time processing for multi users. 呼叫处理程序使用状态迁移法解决呼叫信号采集、处理的多重性问题;使用时间调度技术解决多用户的实时处理问题;