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Re: [libvirt] [PATCH 03/11] Include process start time when doing polkit checks



On 05/02/2013 06:07 AM, Daniel P. Berrange wrote:
> On Thu, May 02, 2013 at 01:03:41PM +0100, Daniel P. Berrange wrote:
>> From: "Daniel P. Berrange" <berrange redhat com>
>>
>> Since PIDs can be reused, polkit prefers to be given
>> a (PID,start time) pair. If given a PID on its own,
>> it will attempt to lookup the start time in /proc/pid/stat,
>> though this is subject to races.
>>
>> It is safer if the client app resolves the PID start
>> time itself, because as long as the app has the client
>> socket open, the client PID won't be reused.
>>
>> Signed-off-by: Daniel P. Berrange <berrange redhat com>
> 
> 
>> +#elif defined(__FreeBSD__)
>> +int virProcessGetStartTime(pid_t pid,
>> +                           unsigned long long *timestamp)

> 
> Note this BSD specific code block has not even been compile tested.
> It is just copied from the polkit codebase with minimal conversion
> to libvirt standards.

I've compile-tested it on FreeBSD (well, I had to do some conflict
resolution in virstring to get this patch to apply, so I hope that when
you rebase, that you end up doing the same resolution - but the
conflicts didn't affect the BSD section of virprocess.c).  It didn't
quite work:

util/virprocess.c: In function 'virProcessGetStartTime':
util/virprocess.c:850: error: incompatible type for argument 3 of 'sysctl'

I think you want to pass &p, not p, as the third argument (at least,
doing that cleared up compilation for me, although I don't know how to
test that the compiled result actually worked).


-- 
Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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