Non existent macros are not replaced

[Jochen Bern]

On 03/03/2011 07:33 PM, Andreas Ericsson wrote:
> On 03/03/2011 06:37 PM, Jochen Bern wrote:
>> 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.
> 
> Yes, but how about a command_line such as this:
>        $USER1$/check_something '$pas$word'
> $pas$ is not a valid macro, so by the reasoning of the original poster
> we should remove it, but that would mean there can *never* be two
> dollar-signs that aren't part of macros inside anything where macros
> get interpreted

I'm not saying that you should follow his reasoning, but why you keep
ignoring the official escaping method?

"Also, if you want to pass a dollar sign ($) on the command line, you
have to escape it with another dollar sign."
-- http://nagios.sourceforge.net/docs/3_0/objectdefinitions.html#command

# grep -n 'pas.*word' ../var/objects.cache
612:    command_name    test_password
613:    command_line    /bin/echo '$$pas$$word'
35520:  check_command   test_password
# grep -n 'pas.*word' ../var/spool/status.dat
54898:  check_command=test_password
54924:  plugin_output=$pas$word

>> On one hand, trusting Nagios to leave "$FOO$" be (rather than properly
>> configuring "$$FOO$$") is not supported.
> 
> It is. If the dollar-signs are within single-quotes the shell won't even
> touch them and '$FOO$' gets passed verbatim to whatever command one's
> trying to run.

The above quote from the docs says it isn't ("you HAVE to"). But as I
said, *enforcing* that out of the blue sky is problematic, to say the least.

Kind regards,
								J. Bern
-- 
Jochen Bern, Systemingenieur --- LINworks GmbH <http://www.LINworks.de/>
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