Capture single key input and continue in C

getch.c

#include <stdio.h>
#include <string.h>
#include <sys/time.h>
#include <termios.h>
#include <stdlib.h>

static struct termios g_old_kbd_mode;

static int kbhit(void) {
        struct timeval timeout;
        fd_set read_handles;
        int status;

        FD_ZERO(&read_handles);
        FD_SET(0, &read_handles);
        timeout.tv_sec = timeout.tv_usec = 0;
        status = select(0 + 1, &read_handles, NULL, NULL, &timeout);
        return status;
}

static void old_attr(void) {
        tcsetattr(0, TCSANOW, &g_old_kbd_mode);
}


int getch( void ) {
        char ch;
        struct termios new_kbd_mode;

        tcgetattr(0, &g_old_kbd_mode);
        memcpy(&new_kbd_mode, &g_old_kbd_mode, sizeof(struct termios));

        new_kbd_mode.c_lflag &= ~(ICANON | ECHO);
        new_kbd_mode.c_cc[VTIME] = 0;
        new_kbd_mode.c_cc[VMIN]  = 1;

        tcsetattr(0, TCSANOW, &new_kbd_mode);
        atexit(old_attr);

        while (!kbhit())
        {
                ch = getchar();
                printf("[%c]", ch);

                if (ch == 'q')
                {
                        exit(1);
                }
        }

        return 0;
}