Re: d_off field in struct dirent and 32-on-64 emulation

From: Adhemerval Zanella
Date: Fri Dec 28 2018 - 06:54:23 EST

On 27/12/2018 16:09, Florian Weimer wrote:
> * Adhemerval Zanella:
>> Also for glibc standpoint, although reverting it back to use getdents
>> syscall for non-LFS mode might fix this issue for architectures that
>> provides non-LFS getdents syscall it won't be a fix for architectures
>> that still provides off_t different than off64_t *and* only provides
>> getdents64 syscall.
>> Currently we only have nios2 and csky (unfortunately). But since generic
>> definition for off_t and off64_t still assumes non-LFS support, all new
>> 32-bits ports potentially might carry the issue.
> For csky, we could still change the type of the non-standard d_off
> field to long long int. This way, only telldir would have to fail
> when truncation is necessary, as mentioned below:

I think it makes no sense to continue making non-LFS as default for
newer 32 bits ports, the support will be emulated with LFS syscalls.