How to Emulate `kbhit()` and `getch()` Functionality on Linux?

Emulating kbhit() and getch() Functionality on Linux

The kbhit() and getch() functions are commonly used in Windows to check for input without interrupting the execution of a loop. However, these functions are not natively supported on Linux operating systems.

The kbhit() Equivalent

To achieve similar functionality on Linux, you can utilize Morgan Mattews's implementation of the kbhit() function. This implementation is compatible with POSIX-compliant systems and can be found here.

The getch() Equivalent

Since kbhit() deactivates buffering at the termios level, it also addresses the getchar() issue. You can use getchar() as-is without disabling buffering as in the provided Windows example.

Combining Both Functions

Once you have implemented the kbhit() functionality, you can adapt the Windows example to Linux as follows:

<code class="C++">#include <unistd.h>
#include <iostream>

int main()
{
    while (true)
    {
        if (kbhit())
        {
            int key = getch();
            if (key == 'g')
            {
                std::cout << "You pressed G" << std::endl;
            }
        }
        usleep(500000);
        std::cout << "Running" << std::endl;
    }
}</code>

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