char *str = NULL
    size_t len = 0;

    size_t n;
    char buf[SIZ];
    while ((n = fread(buf, 1, sizeof(buf), stdin)))
    {
        str = realloc(str, len + n + 1);   // Extend the buffer
        memcpy(str+len, buf, n);           // Append to the string
        len += n;
    }

    str[len] = 0;

    printf("ALLOC'D: %zu", len);