[libvirt] [PATCH] command: avoid double close in virExecWithHook

[Eric Blake]

On 08/21/2012 10:28 AM, Daniel P. Berrange wrote:
> On Tue, Aug 21, 2012 at 11:01:44AM +0200, Ján Tomko wrote:
>> Fix possible double close in the child process after the fork in case
>> infd and outfd are equal, just like they are after being called from
>> virNetSocketNewConnectCommand.
>> ---
>>  src/util/command.c |   14 +++++---------
>>  1 files changed, 5 insertions(+), 9 deletions(-)
> 
> ACK.

Pushed.

> 
> I'm wondering if there's some way we can test this in tests/commandtest.c
> All I can think of is using a nasty LD_PRELOAD hack again to override
> dup/open/close/etc and look for a double-close. Perhaps just leave it up
> to valgrind

Well, we _do_ log double-close via VIR_FORCE_CLOSE; maybe it's
sufficient to set up a test case that opens a file for O_RDWR and passes
that fd for stdin and stdout, then tracking if our logging flags
anything?  But I have not yet tried doing that in the testsuite.

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

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