Interrupting cin.getline() from another thread on Linux

Asked Mar 23 '14 at 19:27

Active Mar 23 '14 at 19:40

Viewed 275 times

I'm working on my radio transmitter and have just ported it to Linux. Here is the problem:

void input_thread()
{
    char buffer[128];
    cout << "Waiting for input\n";
    for (;;)
    {
        cout << "say> ";
        if (cin.getline(buffer, 127).fail())
            // Ctrl+C
            break;
        else if (strlen(buffer) == 0)
            continue;
        signal_source.feed(buffer);
    }
}

I use a std::thread and hope it break the loop when gets a Ctrl+C. This piece of code works well on Windows but not on Linux. I'm wondering if there is a way to safely break the loop so that I can join the thread without causing deadlock? Thanks.

edited Mar 23 '14 at 19:40

Mantosh Kumar

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asked Mar 23 '14 at 19:27

babel92

Did you try `Ctrl-D` instead? – Søren Debois Mar 23 '14 at 19:31
Hi. I add a check for eof and it works for Ctrl+D now! But I really want to handle Ctrl+C as well... – babel92 Mar 23 '14 at 19:43
So you need to install a SIGINT handler, yes? Take a look at [this question](http://stackoverflow.com/questions/1641182/how-can-i-catch-a-ctrl-c-event-c). – Søren Debois Mar 23 '14 at 19:55

Interrupting cin.getline() from another thread on Linux

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