Re: [PATCHv7 0/3] syscalls,x86: Add execveat() system call

David Drysdale
2014-11-13T14:42:58Z

On Wed, Nov 12, 2014 at 9:50 PM, Andrew Morton
<akpm@linux-foundation.org> wrote:
> On Fri, 7 Nov 2014 17:01:01 +0000 David Drysdale <drysdale@google.com> wrote:
>
>> This patch set adds execveat(2) for x86, and is derived from Meredydd
>> Luff's patch from Sept 2012 (https://lkml.org/lkml/2012/9/11/528).
>>
>> The primary aim of adding an execveat syscall is to allow an
>> implementation of fexecve(3) that does not rely on the /proc
>> filesystem, at least for executables (rather than scripts). The
>> current glibc version of fexecve(3) is implemented via /proc, which
>> causes problems in sandboxed or otherwise restricted environments.
>
> Have the relevant glibc people seen/reviewed/liked this?

I think it's been mentioned in passing but not explicitly discussed over there
(https://sourceware.org/ml/libc-alpha/2014-10/msg00497.html,
https://sourceware.org/ml/libc-alpha/2014-10/msg00509.html)
and a couple of the participants in that thread (Christoph Hellwig, Rich Felker)
were also cc:ed here.

It sounded like execveat might be useful for another feature (O_EXEC) but
I'm not sure whether that amounts to the relevant glibc folk liking this...