Re: [Nagios-devel] Non existent macros are not replaced

[Jochen B. <Jochen.Bern@LINworks.de>]

On 03/03/2011 05:54 PM, Andreas Ericsson wrote:
> I think that would be quite stupid, as it would prevent users from
> using shell variables in their commands, or multiple dollar-signs
> for that matter.

Not quite, the handling of escaped dollar signs ("$$") is in a separate
branch immediately preceding the "unknown macro name" branch. Hence, the
properly escaped notation ("$$FOO$$BAR" in Nagios, becomes "$FOO$BAR" on
shell level) would still be available.

(I admit I wasn't aware that it's the *shell* which reduces "$FOO$" to
"$", rather than Nagios.)

On one hand, trusting Nagios to leave "$FOO$" be (rather than properly
configuring "$$FOO$$") is not supported. On the other hand, that has
never been enforced, and enforcing it now promises to break lots of
real-world configurations. I'd say that if it *is* to be enforced, it
would need to be specifically caught and pointed out by the config
verification. And *that* is a can of worms, because nothing keeps you
from using a command in different contexts with different sets of macros
being available or not ...

Kind regards,
								J. Bern
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