How to evaluate a single bit in a decimal integer?

[sovr]

Hi everybody,
I'm using Zabbix 1.8.13 and have an SMTP host which returns its status as an integer which is the decimal encoding of a status bit mask.

E.g.

1 = 0001 = memory fault
2 = 0010 = processor fault
4 = 0100 = disk fault
6 = 0110 = disk fault and processor fault
...
etc.
...
Since the host returns an integer (1 or 2 or 4 or 6 in example above) I don't know how to check whether the 2nd bit ('disk fault') is up and then trigger 'disk fault'.

If it would've returned a string of bit, I would've used a regexp as nilie suggested, but I have no idea how to do with an integer.

Any help greatly appreciated.
Thanks,
Sovr

[herta]

Zabbix doesn't have a bitmap item type, so assuming you cannot install a Zabbix agent on the SMTP server or get it to send values that can be handled more easily by the Zabbix server, the best I can think of is check for possible values.

In the example you gave, there are three things that can go wrong:
0001 = memory fault
0010 = processor fault
0100 = disk fault

So you could create three triggers. E.g.,
- "Memory fault" will fire when the item value is either 1, 3 or 5
- "Processor fault" will fire when the item value is either 2, 3 or 6
- "Disk fault" will fire when the item value is either 4, 5 or 6

Not elegant, I know, and you'll need to update all the triggers if a new fault code is added.

[sovr]

Thanks a lot for the suggestion.

Unfortunately the solution is not feasible, because I simplified but actual bit mask is 16 bits so there are simply too many combinations

Any other idea greatly appreciated

[herta]

Ouch. 16 bits would indeed make that impracticable.

Second idea, "slightly" more involved and not tested by me.

You could try creating a trigger to fire when the value of your item is not 0.

Then create an action (Cf. Configuration -> Actions) with Event source = Triggers. In the Operations tab, select Operation type "Remote command" and create a custom script to run on the zabbix server. Pass the item value to the script, parse it in the script and send the relevant values back to (16) zabbix items. Then trigger on those items.

Not sure whether that is more feasible. As I said, it's "slightly" more involved.

[sovr]

I solved using an external check.

Thanks a lot.

[herta]

Ah, much simpler.

Thanks for sharing your solution.