Linux에서 입력을 처리하는 방법: kbhit() 및 getch()의 대안?

<code class="c">#include <stdio.h>
#include <termios.h>

int kbhit() {
    struct termios oldt, newt;
    int ch;
    int oldf;

    tcgetattr(STDIN_FILENO, &oldt);
    newt = oldt;
    newt.c_lflag &= ~(ICANON | ECHO);
    tcsetattr(STDIN_FILENO, TCSANOW, &newt);
    oldf = fcntl(STDIN_FILENO, F_GETFL, 0);
    fcntl(STDIN_FILENO, F_SETFL, oldf | O_NONBLOCK);

    ch = getchar();

    tcsetattr(STDIN_FILENO, TCSANOW, &oldt);
    fcntl(STDIN_FILENO, F_SETFL, oldf);

    if (ch != EOF) {
        ungetc(ch, stdin);
        return 1;
    }

    return 0;
}

int main() {
    while (true) {
        if (kbhit()) {
            char c = getchar();
            if (c == 'g') {
                printf("You pressed G\n");
            }
        }
        printf("Running\n");
        sleep(1);
    }

    return 0;
}</code>