On Wed, 7 Mar 2012, Michael Friedrich wrote: > Tomas Macek wrote: >> I know, that I can use "illegal_object_name_chars" option in icinga.cfg >> and I have there: "`~!$%^&*|'"<>?,()=". It's the default value. >> But the question for me is why shouldn't I just to leave this option >> blank? Why should I restrict the short name of the host name or service >> name? > > imagine what such characters could cause in an interpreter / a shell > being called by the given macros you are using in your commands. > > http://docs.icinga.org/latest/en/configmain.html#configmain-illegal_object_name_chars > > the illegal macro chars only affect the macros which are dynamically > generated by external input (such as a check or a comment (author)) and > not being read from the configs. > > >> The documentation says "When used properly, the $HOSTNAME$ macro will >> contain this short name.". What means the "properly"? > > given the examples above, you will learn that removing the ' from the > illegal object name chars will let define the following. > > define host { > name foo'bar > ... > check_command check_foo > } > > define command { > name check_foo > command_line /bin/echo '$HOSTNAME$' > } > > will result in the command - see raw command line > https://wiki.icinga.org/display/testing/Icinga+Plugin+Testing > > $ /bin/echo 'foo'bar' > > run that and see yourself. > > so given the example, you will most likely understand that such basic > object attributes being reused as macros on commands (checks, > notifications, eventhandlers) can cause *dangerous* things and it is NOT > advised to blank this option. > > kind regards, > michael >
Thank you for explanation! It seems now like a stupid question... :-/ Regards, Tomas ------------------------------------------------------------------------------ Virtualization & Cloud Management Using Capacity Planning Cloud computing makes use of virtualization - but cloud computing also focuses on allowing computing to be delivered as a service. http://www.accelacomm.com/jaw/sfnl/114/51521223/ _______________________________________________ icinga-users mailing list icinga-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/icinga-users
