Block terminal input while running a terminal program

Question

When I press enter while my terminal program runs, a new line is added. How can I disable this? I don't want to use ncurses. I am on Ubuntu.

I think there's no way in standard c++. maybe you should use linux's API — ikh
– ikh, Commented Jan 20, 2014 at 9:13
@ikh: I use ANSI codes to move the cursor, so something like that is okay, too! — gartenriese
– gartenriese, Commented Jan 20, 2014 at 9:15
@n.m: Something like this: ttynew.c_lflag &= ~ECHO; ? Can you elaborate a bit what it exactly does? — gartenriese
– gartenriese, Commented Jan 20, 2014 at 9:18

Community · Accepted Answer · 2017-05-23 12:03:46Z

1

Following up n.m's hint, I found this and came up with this:

static struct termios t;
tcgetattr( STDIN_FILENO, &t);
t.c_lflag &= ~ECHO;
tcsetattr( STDIN_FILENO, TCSANOW, &t);

This seems to block all input to the terminal.

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answered Jan 20, 2014 at 9:53

gartenriese

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1 Comment

You probably also want to set either non-canonical mode, or "raw" mode, and echo all normal (non-control) characters yourself. See man termios.