SIGHUP causes duplicate trigger name

[Loic D. <loi...@gm...>]

Hello Everybody,

I have noticed a small issue when SIGHUP is sent to the SNMP Agent version 5.3.1. If triggers are defined, it causes a 'duplicate trigger name' error. Using for instance the configuration file given after the signature, I got:  

NET-SNMP version 5.3.0.1 restarted
error on subcontainer '' insert (-1)
error on subcontainer '' insert (-1)
/etc/snmp/snmpd.conf: line 10: Error: duplicate trigger name
error on subcontainer '' insert (-1)
error on subcontainer '' insert (-1)
/etc/snmp/snmpd.conf: line 11: Error: duplicate trigger name
error on subcontainer '' insert (-1)
error on subcontainer '' insert (-1)
/etc/snmp/snmpd.conf: line 12: Error: duplicate trigger name
error on subcontainer '' insert (-1)
error on subcontainer '' insert (-1)
/etc/snmp/snmpd.conf: line 13: Error: duplicate trigger name
net-snmp: 4 error(s) in config file(s)
error on subcontainer '' insert (-1)
error on subcontainer '' insert (-1)
error on subcontainer '' insert (-1)
error on subcontainer '' insert (-1)
error on subcontainer '' insert (-1)
error on subcontainer '' insert (-1)
error on subcontainer '' insert (-1)
error on subcontainer '' insert (-1)
error on subcontainer '' insert (-1)
error on subcontainer '' insert (-1)
error on subcontainer '' insert (-1)
error on subcontainer '' insert (-1)
error on subcontainer '' insert (-1)


I think that the problem is due to the fact that the mteTriggerTable isn't deleted upon Agent's restart. Hence, this causes a 'duplicate trigger name' when the configuration file is re-read. 

Unfortunately, I am not familiar enough with the Net-SNMP code to be able to create the corresponding patch. If some of you could point me where to look to code that delete function, I could perhaps produce some code... 

I will fill a BUG report. 

Hope this helps,
Loic. 
--

# simple snmpd.conf to illustrate the problem
# 
# start the agent, and sent a SIGHUP. 
# 
rocommunity debugro
rwcommunity debugrw

trapsess -c debug -Ci -t 10 -r 18 -v 2c localhost:1162

rouser       internal 
agentSecName internal

# you may change to any partition of your convenience
# 
disk /boot 80%
monitor -i -r 10 -o dskPath.1 -o dskErrorMsg.1 "disk1WS" dskPercent.1 >= 20
monitor -i -r 10 -o dskPath.1 -o dskErrorMsg.1 "disk1AS" dskPercent.1 >= 25
monitor -i -r 10 -o dskPath.1 -o dskErrorMsg.1 "disk1AC" dskPercent.1 < 25 
monitor -i -r 10 -o dskPath.1 -o dskErrorMsg.1 "disk1WC" dskPercent.1 < 20

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