4.第四次课\code\alarm.c ..........\....\fifo_read.c ..........\....\fifo_write.c ..........\....\kill.c ..........\....\msg.c ..........\....\mysignal.c ..........\....\pipe.c ..........\....\pipe_rw.c ..........\....\popen.c ..........\....\seri.c ..........\....\share_memory.c ..........\....\sigaction.c ..........\linux串口编程.ppt ..........\linux进程间通信.DOC ..........\linux进程间通信.ppt ..........\code 4.第四次课