[Nagiosplug-devel] spopenenv (Was: no subject)

Andreas Ericsson ae at op5.se
Thu Oct 13 05:57:38 UTC 2005

John P. Rouillard wrote:
> In message <02F3F455-47E6-453A-A6F3-B9DABFE654B2 at mac.com>,
> Ton Voon writes:
>>On 12 Oct 2005, at 18:59, John P. Rouillard wrote:
>>>I have been trying to use check_by_ssh with an ssh-agent to allow
>>>encrypted keys to be kept on the system.
>>>While using spopen in the plugin is a great idea, it breaks using the
>>>ssh-agent to manage keys since the required environment variable:
>>>SSH_AUTH_SOCK isn't present in the child environment.
>>>I had patched this once (at another job, code unavailable) by
>>>duplicating spopen to spopenenv and adding a second argument that was
>>>a list of the environment strings (retrieved with getenv) that should
>>>be added to the child environment.
>>>So does adding support to check_by_ssh to use an ssh-agent sound
>>I think this sounds like a good idea.
>>Is it possible to have the 2nd argument to spopen be the optional  
>>array of variables? That way we're not trying to maintain a spopen  
>>and an spopenenv.
> You could use a varargs list I suppose.

varargs are obsoleted in favor of stdarg, which is ANSI X3.159-1989 
(C89) compliant.

> Another way to do it might be
> with a macro that maps:
>    spopen(a) -> spopenenv (a, NULL)

Good idea. ;)

> and then you just have spopenenv. But it's been a long time since I have
> done C programming (almost 20 years sigh).

27, if standards ratification dates are anything to go by. :)

Andreas Ericsson                   andreas.ericsson at op5.se
OP5 AB                             www.op5.se
Tel: +46 8-230225                  Fax: +46 8-230231

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