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Date: Mon, 6 May 2024 16:42:10 -0700
From: Tony Ambardar <tony.ambardar@...il.com>
To: Rich Felker <dalias@...c.org>
Cc: musl@...ts.openwall.com
Subject: Re: [PATCH v2] add renameat2 linux syscall wrapper
On Mon, May 06, 2024 at 10:50:57AM -0400, Rich Felker wrote:
> On Tue, Apr 23, 2024 at 04:43:55PM -0700, Tony Ambardar wrote:
> > This syscall is available since Linux 3.15 and also implemented in glibc
> > from version 2.28. It is commonly used in filesystem or security contexts.
> >
[SNIP]
>
> If flags is 0, the SYS_renameat syscall is semantically equivalent to
> the SYS_renameat2 one, so it would be better to just unconditionally
> do that first rather than failing and falling back.
>
Do you mean rearranging and dropping the ENOSYS conditional, e.g. something
like below?
> int r;
> #ifdef SYS_renameat
> if (!flags) r = __syscall(SYS_renameat, oldfd, old, newfd, new);
> else
> #endif
> r = __syscall(SYS_renameat2, oldfd, old, newfd, new, flags);
> return __syscall_ret(r);
Please clarify and I'll update.
Thanks,
Tony
> Rich
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