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Re: Add F_SEAL_FUTURE_WRITE from Linux 5.1 to bits/fcntl-linux.h
- From: Florian Weimer <fweimer at redhat dot com>
- To: Joseph Myers <joseph at codesourcery dot com>
- Cc: <libc-alpha at sourceware dot org>
- Date: Tue, 21 May 2019 08:04:52 +0200
- Subject: Re: Add F_SEAL_FUTURE_WRITE from Linux 5.1 to bits/fcntl-linux.h
- References: <alpine.DEB.2.21.1905202158180.19503@digraph.polyomino.org.uk>
* Joseph Myers:
> This patch adds the new F_SEAL_FUTURE_WRITE constant from Linux 5.1 to
> bits/fcntl-linux.h.
>
> Tested for x86_64.
>
> 2019-05-20 Joseph Myers <joseph@codesourcery.com>
>
> * sysdeps/unix/sysv/linux/bits/fcntl-linux.h [__USE_GNU]
> (F_SEAL_FUTURE_WRITE): New macro.
>
> diff --git a/sysdeps/unix/sysv/linux/bits/fcntl-linux.h b/sysdeps/unix/sysv/linux/bits/fcntl-linux.h
> index 4b4d6f7ae5..3f32eb328b 100644
> --- a/sysdeps/unix/sysv/linux/bits/fcntl-linux.h
> +++ b/sysdeps/unix/sysv/linux/bits/fcntl-linux.h
> @@ -284,6 +284,8 @@ struct f_owner_ex
> # define F_SEAL_SHRINK 0x0002 /* Prevent file from shrinking. */
> # define F_SEAL_GROW 0x0004 /* Prevent file from growing. */
> # define F_SEAL_WRITE 0x0008 /* Prevent writes. */
> +# define F_SEAL_FUTURE_WRITE 0x0010 /* Prevent future writes while
> + mapped. */
> #endif
>
> #ifdef __USE_GNU
I checked this against the Linux sources and the change looks good to
me.
Thanks,
Florian