Flusher for myreverse testing

flusher.c

/***
 * Flusher by Kirill Elagin <[email protected]> [http://kirelagin.ru/]
 *
 * Use it this way:
 *  ./flusher < testfile | ./myreverse
 * Exclamation marks in input file will flush the buffer.
**/

#include <stdio.h>
#include <time.h>

int main(int argc, char **argv)
{
    int sleep_milisec = 100;
    if (argc > 1) {
        sleep_milisec = atoi(argv[1]);
    }

    struct timespec t1, t2;
    t1.tv_sec =  sleep_milisec / 1000;
    t1.tv_nsec = (sleep_milisec % 1000) * 1000000;

    int c;
    while (1) {
        c = getc(stdin);
        if (c == EOF) {
            break;
        }
        if (c == '!') {
            fflush(stdout);
            nanosleep(&t1, &t2);
        } else {
            putc(c, stdout);
        }
    }

    return 0;
}