AW: Processing all messages with NEB

[Mohr James]

Hi Andreas!

Thank you very much for your prompt and very useful response. There are
a few comments below:

<SNIP>
>> > 
>> > int helloworld_handle_status(int event_type, void *data){ char 
>> > temp_buffer[1024]; service * tmp_service; 
>> > nebstruct_service_status_data * service_status_data; if( 
>> > (service_status_data=(nebstruct_service_status_data *)data) ){ 
>> > tmp_service = (service *) service_status_data->object_ptr;
>> > snprintf(temp_buffer,sizeof(temp_buffer)-1,"EVENT: %d MESSAGE:
>> > %s",event_type,tmp_service->plugin_output); } 
>> > write_to_all_logs(temp_buffer,NSLOG_INFO_MESSAGE); /*
>> > write_to_all_logs("inside:
>> > helloworld_handle_status",NSLOG_INFO_MESSAGE); */ }
>> > 
>> > However, when use tmp_service->plugin_output, it says 
>> "structure has 
>> > no member named `plugin_output'". Inside of 
>> ../include/ojects.h, there 
>> > is the definition of the service_struct, which shows me
>> > 
>> > char    *plugin_output;
>> > 
>> > However, this is within an the block #ifdef NSCORE.
>> 
>> Which is correct. All NEB-modules must #define NSCORE, since 
>> that's where they'll be running. #ifndef NSCORE is for the cgi's.
>>
>> > Moving the line
>> > outside of the block, it will compile but when I send 
>> something to a 
>> > service with send_nsca  the value of plugin_output ends up 
>> being null. 
>> > So, I am at a loss how to get the text of the plugin_output.
>> > 
>> 
>> This is because you're fetching it from 
>> service_status_data->object_ptr->plugin_output which isn't 
>> filled in by the time you get the data.
>> 
>> You need to reference service_status_data->output instead.


After I sent the email, I moved the #define NSCORE to the very beginning
of the source file (before *all* of the includes. This seemed to catch
everything and there were no compile errors even after moving
tmp_service->plugin_output back to the right place in objects.h. I'll
try it with service_status_data->output and see how that works.

>> Please keep in mind that the neb-code is to be considered 
>> fairly volatile. It's possible (and quite likely) that some 
>> of the variables of the nebstruct_*_data structs will 
>> disappear in the next overhaul.

Thanks for the warning! ;-) Is there an announcement mailing list or
something?

>> > I have looked at th code for the mysql inserter module. 
>> However, I get 
>> > stuck here as well.One thing that is unclear is whether **all** 
>> > messages get sent through here or just the status changes. 
>> I need all 
>> > of the messages and not just the status changes.
>> > 
>> 
>> All results of all checks are passed through the modules. 
>> Once before the plugin is executed and once after.

I figured as much. I managed to change the message text (see below), but
it was getting changed twiced.

>> > An additional goal is to be able to process and change the 
>> messages 
>> > before being sent to the GUI. For example, the text 
>> contains a code 
>> > number which tells the system to change the text to a 
>> specific URL so 
>> > all you need to do is click on the message text to  get 
>> instructions 
>> > on what to do in a specific case. However, I have not yet 
>> figured out 
>> > how to change the message that appears in the GUI.
>> > 
>> 
>> You can rewrite it with a module. Make sure you take care 
>> not to leak any memory.

Thanks for the tip. The last time I did any C code at this level was 10
years ago so I can use all the help I can get.
 
>> You're on your own when it comes to writing new code. I'll 
>> gladly answer neb-module questions though, so it at least 
>> gets documented somewhere.

"In the next world, you're on your own."

Well then, you will probably be hearing a lot from me. ;-)

In addition to my "real" job I am a professional writer and I love to
write. What I can do it to take the material that is passed back and
forth in the mailing list and try to put it together in something
coherent. I have already started putting my notes together and will post
them  on my web site as I progress (I hope).

Regards,

Jim Mohr


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