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

From: Florian Weimer
Date: Fri Dec 28 2018 - 06:56:40 EST

* Adhemerval Zanella:

> 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.

Sorry, I don't see how this matters. seekdir and telldir are NOT
affected by LFS.