Re: [PATCH v4 2/5] fs: Add fchmodat2()

[Andreas Schwab]

On Jul 27 2023, David Laight wrote:

> From: Aleksa Sarai
>> Sent: 25 July 2023 17:36
> ...
>> We almost certainly want to support AT_EMPTY_PATH at the same time.
>> Otherwise userspace will still need to go through /proc when trying to
>> chmod a file handle they have.
>
> That can't be allowed.

IIUC, fchmodat2(fd, "", m, AT_EMPTY_PATH) is equivalent to fchmod(fd,
m).  With that, new architectures only need to implement the fchmodat2
syscall to cover all chmod variants.

-- 
Andreas Schwab, schwab@xxxxxxxxxxxxxx
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