串口通信例程，内含串口类，一个老外写的，我修正了一个bug：在接收数据流未完成前退出程序会导致进程驻留在内存-Serial communication routines, containing serial port class, written by a foreigner, I fixed a bug: the receiving data stream does not quit the program before the completion of the process will l

在linux环境下C语言实现读取串口数据，多进程通信，-In the Linux environment C language to read the serial data, multi process communication,