Re: canonicalize-lgpl: support paths of length > 2 GB

[Bruno Haible]

Hi Pádraig,

> There is a later cast to (long int) that would
> similarly truncate large values on LLP64 systems.
> How about something like this as well?
> 
> @@ -311,7 +312,7 @@ __realpath (const char *name, char *resolved)
>                  }
> 
>                len = strlen (end);
> -              if ((long int) (n + len) >= path_max)
> +              if (SIZE_MAX - len <= n || path_max <= n + len)
>                  {
>                    freea (buf);
>                    __set_errno (ENAMETOOLONG);

Thanks, also for the integer overflow check (useful also for the LP64
platforms). Here is the proposed revised patch.

Bruno

0001-canonicalize-lgpl-Support-the-case-path_max-INT_MAX.patch
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