SIGHUP/duplicate monitor instances

Hello folks,


In the current net-snmp version, there are no 'release' routines 
corresponding to parse_mteTriggerTable(), parse_simple_monitor() or 
parse_default_monitors().  This is causing the 'monitor' definitions not 
getting cleaned out on a SIGHUP.  In case of linkUpDownNotifications for 
instance, duplicate 'monitor's get added to the mteTriggerTable and 
multiple traps are seen for the same link up/down event.  The number of 
traps seen is equal to the number of SIGHUPs issued--which suggests that 
the old 'monitor' entries should have been removed before adding them 
again on reconfig.


My question is:  were the 'release' routines left out intentionally, say 
to avoid cleaning out someone else's (subagent, command line trap 
addition etc) monitor entries?   Or is there a safe way to clean the 
entries out?

Most of the 'monitor' entries seem to be created with owner 
'snmpd.conf.'  Is there any other way to distinguish the entries as 
being owned by the process that the SIGHUP is sent to?



Reference code:

--- agent/mibgroup/disman/mteTriggerTable.c ---

init_mteTriggerTable(void)
{
    ...

    /*
     * register our config handler(s) to deal with registrations
     */
    snmpd_register_config_handler("mteTriggerTable", parse_mteTriggerTable,
                                  NULL, NULL);

    snmpd_register_config_handler("monitor", parse_simple_monitor, NULL,
                                  "[options] monitor_expression [see 
\"man snmpd.conf\"]");
    snmpd_register_config_handler("defaultMonitors",
                                  parse_default_monitors, NULL, "yes|no");

    ...
}
-----------------------------------------------



Many thanks,

- Tushar

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