#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <termios.h>

int
main(void)
{
    struct termios term;

    if (tcgetattr(STDIN_FILENO, &term) < 0) {
        fprintf(stderr, "tcgetattr error");
        exit(EXIT_FAILURE);
    }

    switch (term.c_cflag & CSIZE) {
    case CS5:
        printf("5 bits/byte\n");
        break;
    case CS6:
        printf("6 bits/byte\n");
        break;
    case CS7:
        printf("7 bits/byte\n");
        break;
    case CS8:
        printf("8 bits/byte\n");
        break;
    default:
        printf("unknown bits/byte\n");
    }

    term.c_cflag &= ~CSIZE;     /* zero out the bits */
    term.c_cflag |= CS8;        /* set 8 bits/byte */

    if (tcsetattr(STDIN_FILENO, TCSANOW, &term) < 0) {
        fprintf(stderr, "tcsetattr error");
        exit(EXIT_FAILURE);
    }

    exit(0);
}