Re: [Nagios-devel] Double escaping in $ARGx$

[Guest]

On 11 Aug 2009, at 10:40, Andreas Ericsson wrote:

> I mean that we can get rid of roughly 35-40% of the load from Nagios
> by
> avoiding the extra fork()+execve() the shell causes by simply parsing
> the command ourselves.

I see. perl does something like that. You call system() with a string
(like "/bin/echo here I am") and it works out if there are any shell
meta characters in there. If so, it invokes via the shell, otherwise
it splits it based on spaces and then calls execve().

So the usual definitions of "$USER1$/check_icmp -H hostname" will
speed up, but something like "$USER1$/check_http -H hostname -s
'string'" won't.

We could do something like that as well, though there's potential
breakage with existing configurations.

I've never dug into perl's C code - this would be a handy excuse!

Ton






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