Linux串行端口使用termios.h配置阻止

I'm writing an embedded Linux application that (1) opens a serial connection to another device, (2) sends a known command, (3) checks port for incoming characters (response) until expected response phrase or character is detected, (4) repeats step 2 and 3 until a series of commands are sent and responses received, (5) then closes the port.I'm writing an embedded Linux application that