Problem with serial port program

[alegomaster]

Hi, right now I am new to Ubuntu so I can't solve this issue by myself.

I wrote a program in C that would communicate data between two computers, and have an issue with the program. Whenever I sent text from one computer to the other, the recieving computer would send it back to the transmitting computer even though I didn't specify it. Here's the code that is involved with receiving.

//First part
file=fopen("/dev/ttyS0","r");
// Some Error checking code

while (1==1)
	{
		while(fgets(test, sizeof(test), file)!=NULL);
		{
		fputs(test, stdout);
		}
        }

[johnl]

You probably need to:

1. retrieve the current tty settings with tcgetattr
2. mask out the appropriate ECHO flags
3. update the tty settings with tcsetattr

check the man pages (man tcsetattr) to get started.

Hope this helps.

[alegomaster]

You probably need to:

1. retrieve the current tty settings with tcgetattr
2. mask out the appropriate ECHO flags
3. update the tty settings with tcsetattr

check the man pages (man tcsetattr) to get started.

Hope this helps.

Right now I have issues with figuring out which flag does the ECHO. Can anybody help.