bug#8154: du: issue with `--files0-from=DIR'

[Paul Eggert]

On 03/02/2011 07:09 AM, Jim Meyering wrote:
> -  struct argv_iterator *ai = malloc (sizeof *ai);
> +  struct argv_iterator *ai;
> +  struct stat st;
> +
> +  if (fstat (fileno (fp),&st) == 0&&  S_ISDIR (st.st_mode))
> +    {
> +      errno = EISDIR;
> +      return NULL;
> +    }
> +
> +  ai = malloc (sizeof *ai);

My kneejerk reaction is that this part of the patch
should not be needed (though other fixes obviously are).
There are lots of reasons that the stream could fail:
why check for directories specially?  Just let the
stream fail in the way that it normally would; this
keeps the code smaller and simpler.  On an ancient
host where "cat dir/" works, "du --files0-from=dir/"
should not arbitrarily fail.