char *str = NULL;
    size_t len = 0;
    size_t allocd = 0;

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

    ++allocd;
    str = realloc(str, allocd);
    str[len] = 0;

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