From: Stefan Metzmacher <metze@samba.org>
To: Miklos Szeredi <mszeredi@redhat.com>, Al Viro <viro@ZenIV.linux.org.uk>
Cc: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org,
linux-api@vger.kernel.org, Eric Sandeen <sandeen@sandeen.net>
Subject: Re: [PATCH] vfs: add faccessat2 syscall
Date: Sat, 18 Apr 2020 20:36:10 +0200 [thread overview]
Message-ID: <c47459a5-3323-121e-ec66-4a8eb2a8afca@samba.org> (raw)
In-Reply-To: <20200416143532.11743-1-mszeredi@redhat.com>
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Hi Miklos,
> POSIX defines faccessat() as having a fourth "flags" argument, while the
> linux syscall doesn't have it. Glibc tries to emulate AT_EACCESS and
> AT_SYMLINK_NOFOLLOW, but AT_EACCESS emulation is broken.
>
> Add a new faccessat(2) syscall with the added flags argument and implement
> both flags.
>
> The value of AT_EACCESS is defined in glibc headers to be the same as
> AT_REMOVEDIR. Use this value for the kernel interface as well, together
> with the explanatory comment.
It would be nice if resolv_flags would also be passed in addition to the
at flags.
See:https://lore.kernel.org/linux-api/CAHk-=wiaL6zznNtCHKg6+MJuCqDxO=yVfms3qR9A0czjKuSSiA@mail.gmail.com/
We should avoid expecting yet another syscall in near future.
metze
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next prev parent reply other threads:[~2020-04-18 18:36 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-16 14:35 [PATCH] vfs: add faccessat2 syscall Miklos Szeredi
2020-04-16 14:43 ` Florian Weimer
2020-04-18 18:36 ` Stefan Metzmacher [this message]
2020-04-18 19:00 ` Miklos Szeredi
2020-04-18 20:22 ` Stefan Metzmacher
2020-04-20 8:58 ` Miklos Szeredi
2020-04-20 9:03 ` Stefan Metzmacher
2020-04-19 9:56 ` Aleksa Sarai
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