in reply to snmp-trap

If all you want are the oid(s), have you looked at snmptranslate from Net-SNMP?

snmptranslate -m <path to mib> -Tz > oid_list.txt

or

snmptranslate -M <path to directory containing mibs> -Tz > oid_list.txt

For example (to get the oids for Powernet UPSes):

snmptranslate -m ./powernet396.mib -Tz > powernet396.oid

On Redhat/CentOS it's part of net-snmp-utils.

--gsiems