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Date: Tue, 11 Jul 2006 17:28:08 -0700
From: "H. Peter Anvin" <hpa@zytor.com>
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To: Cedric Le Goater <clg@fr.ibm.com>
CC: Ulrich Drepper <drepper@gmail.com>, linux-kernel@vger.kernel.org,
       Andrew Morton <akpm@osdl.org>, Kirill Korotaev <dev@openvz.org>,
       Andrey Savochkin <saw@sw.ru>,
       "Eric W. Biederman" <ebiederm@xmission.com>,
       Herbert Poetzl <herbert@13thfloor.at>,
       Sam Vilain <sam.vilain@catalyst.net.nz>,
       "Serge E. Hallyn" <serue@us.ibm.com>, Dave Hansen <haveblue@us.ibm.com>
Subject: Re: [PATCH -mm 0/7] execns syscall and user namespace
References: <20060711075051.382004000@localhost.localdomain>	 <44B3EA16.1090208@zytor.com> <44B3ED3B.3010401@fr.ibm.com>	 <44B3EDBA.4090109@zytor.com> <a36005b50607111250k70598c31nbc9c0de661dba9e6@mail.gmail.com> <44B41D39.801@fr.ibm.com>
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Cedric Le Goater wrote:
> 
> How's that ?
> 
> int execvef(int flags, const char *filename, char *const argv [], char
> *const envp[]);
> 
> initially, flags would be :
> 
> #define EXECVEF_NEWNS	0x00000100
> #define EXECVEF_NEWIPC	0x00000200
> #define EXECVEF_NEWUTS	0x00000400
> #define EXECVEF_NEWUSER	0x00000800
> 
> execvef() would behave like execve() if flags == 0 and would return EINVAL
> if flags is invalid. unshare of a namespace can fail and usually returns
> ENOMEM.
> 

To be more specific, I guess, what I'm proposing is:

int execxveat(int flags, int dirfd, const char *filename,
	      char * const *argv, char * const *envp);

... with the -x- for the flags field; that can be dropped since it's 
already established that -at() variants can take additional flags.

	-hpa