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I’m developing an application that reads data from a serial port and sends it over a TCP connection, and vice versa. Unfortunately, while reading data from serial port, it never stops. It does not detect EOF mark, nor EOL or some other special character.
So, how could i detect an end of file (or “end of connection”) over serial port in C and Linux?
Depends on how much control you have over the protocol used for the serial link. Unless the files implicitly include some end-of-file marker (and as I’ve understood your post they don’t), you need to implement some kind of communication protocol in order to transfer files.
Some of the most simple procols used way back in the BBS days were XMODEM and it’s derivatives. They may be simple enough for you to use.
If you have a full-blown computer at the other end of the serial line, it would probably be far simpler just to set up an PPP link over the serial line and do the communication over TCP/IP.