Sleep for a specified number of milliseconds

msleep.c

int
msleep(int ms) {
        struct timespec req = {0}, rem;
        int r = ms / 1000;

        if(r >= 1) {
                req.tv_sec = r;
                ms -= r * 1000;
        }
        if(ms)
                req.tv_nsec = ms * 1000000;

        while((r = nanosleep(&req, &rem)) == -1 && errno == EINTR)
                req = rem;
        return r;
}