RFC: PATCH for Zabbix 1.1.5: Trigger using diff for TEXT item keys

[freejoe]

This patch has side-effects that I have not seen during my tests. It works only for text-base triggers. SO PLEASE DO NOT USE IT.

Sorry for that.

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Original post:

I created an item "Status of service ssh" with key "svc.status[ssh]" (agent-based,Solaris 10 SMF), which returns a string like "online" or "disabled". The corresponding trigger "Status of service ssh changed on server {HOSTNAME}" with expression "{Solaris_t:svc.status[ssh].diff(0)}>0" was always "UNKNOWN", because the item->lastvalue got never updated.

This tiny patch changes the update_item in src/zabbix_server/functions.c, so the item has a chance to get updated.

$ diff src/zabbix_server/functions.c.*
714c714
<               if ((value->type & AR_TEXT) && ((item->prevvalue_null == 1) || (item->lastvalue_null == 1) ||
---
>               if((value->type & AR_TEXT) == 0 && ((item->prevvalue_null == 1) || (item->lastvalue_null == 1) ||

I attach the patch file.

Kind regards,
Joerg