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From: "Michael Kerrisk" <mtk-manpages@gmx.net>
To: ebiederm@xmission.com (Eric W. Biederman)
Cc: torvalds@osdl.org, linux-kernel@vger.kernel.org, akpm@osdl.org,
	janak@us.ibm.com, viro@ftp.linux.org.uk, hch@lst.de, ak@muc.de,
	paulus@samba.org, janak@us.ibm.com
Subject: Re: [PATCH] unshare: Cleanup up the sys_unshare interface before we are committed.
Date: Thu, 16 Mar 2006 20:40:55 +0100 (MET)	[thread overview]
Message-ID: <31641.1142538055@www064.gmx.net> (raw)
In-Reply-To: m1y7za9vy3.fsf@ebiederm.dsl.xmission.com

Eric,

> Since we have not crossed the magic 2.6.16 line can we please
> include this patch.  My apologies for catching this so late in the
> cycle.
> 
> - Error if we are passed any flags we don't expect.
> 
>   This preserves forward compatibility so programs that use new flags 
>   that
>   run on old kernels will fail instead of silently doing the wrong thing.
> 
> - Use separate defines from sys_clone.
> 
>   sys_unshare can't implement half of the clone flags under any
> circumstances
>   and those that it does implement have subtlely different semantics than
>   the clone flags.  Using a different set of flags sets the
>   expectation that things will be different.
> 
>   Binary compatibility with current users of the is still maintained
>   as the unshare flags and the clone flags have the same values.

Thanks for this.  I had begun to think I must simply be dense
for thinking there was a problem here...

I will update my draft manual page accordingly.

Cheers,

Michael

-- 
Michael Kerrisk
maintainer of Linux man pages Sections 2, 3, 4, 5, and 7 

Want to help with man page maintenance?  
Grab the latest tarball at
ftp://ftp.win.tue.nl/pub/linux-local/manpages/, 
read the HOWTOHELP file and grep the source 
files for 'FIXME'.

  parent reply	other threads:[~2006-03-16 19:40 UTC|newest]

Thread overview: 37+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2006-03-16 16:49 [PATCH] unshare: Cleanup up the sys_unshare interface before we are committed Eric W. Biederman
2006-03-16 17:31 ` [PATCH] unshare: Use rcu_assign_pointer when setting sighand Eric W. Biederman
2006-03-17  6:48   ` Paul E. McKenney
2006-03-17 17:44   ` Oleg Nesterov
2006-03-17 20:56     ` Andrew Morton
2006-03-18 13:12       ` Oleg Nesterov
2006-03-18 15:43         ` Janak Desai
2006-03-18 17:24           ` Oleg Nesterov
2006-03-18 17:41             ` [PATCH] for 2.6.16, disable unshare_vm() Oleg Nesterov
2006-03-18 18:10               ` Linus Torvalds
2006-03-18 18:29                 ` Ulrich Drepper
2006-03-18 18:48                 ` Janak Desai
2016-03-14 13:15             ` unshare(CLONE_VM) Re: [PATCH] unshare: Use rcu_assign_pointer when setting sighand Julian Smith
2016-03-14 18:35               ` Linus Torvalds
2006-03-18 13:13       ` [PATCH] implement unshare(CLONE_SIGHAND) for single-thread case Oleg Nesterov
2006-03-18 15:10       ` [PATCH] unshare: Error if passed unsupported flags Eric W. Biederman
2006-03-18 15:33         ` Janak Desai
2006-03-18 16:29       ` [PATCH] unshare: Use rcu_assign_pointer when setting sighand Janak Desai
2006-03-16 19:40 ` Michael Kerrisk [this message]
2006-03-16 20:33 ` [PATCH] unshare: Cleanup up the sys_unshare interface before we are committed Andrew Morton
2006-03-16 20:41   ` Linus Torvalds
2006-03-16 21:58     ` Eric W. Biederman
2006-03-16 22:19       ` Andrew Morton
2006-03-16 21:36   ` Janak Desai
     [not found] <1359.1142546753@www064.gmx.net>
2006-03-16 23:34 ` Michael Kerrisk
2006-03-16 23:57   ` Linus Torvalds
2006-03-17  1:11     ` Michael Kerrisk
2006-03-17  5:42       ` Linus Torvalds
2006-03-17 16:04         ` Eric W. Biederman
2006-03-17 16:49           ` Janak Desai
2006-03-17 20:27         ` Michael Kerrisk
2006-03-18 18:41         ` Eric W. Biederman
2006-03-18 19:54           ` Janak Desai
2006-03-19 13:58             ` Eric W. Biederman
2006-03-18 23:41           ` Paul Mackerras
2006-03-20  4:45 Albert Cahalan
2006-03-20 16:52 ` Eric W. Biederman

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