Re: Help with exec and pass

On Wed, 2005-10-12 at 18:21 +0200, Santanu Misra wrote:

> This is my entry in snmpd.conf file;
> only using one of this at a given time.
> 
>  
> #pass .1.3.6.1.4.1.9999.1 /usr/bin/lmstat.pl
> exec  .1.3.6.1.4.1.9999.1 FLEXLM /usr/bin/lmstat.pl

Please note that "pass" and "exec" are *NOT* direct
equivalents. "exec" (and "sh") are used to report the
output of an arbitrary command - which will typically
know nothing about SNMP.

"pass" is used to implement SNMP-style behaviour
without needing to incorporate code into the agent
proper.   The pass-through script is expected to
follow a particular API, as described in snmpd.conf(5)
(see under "PASS-THROUGH CONTROL")

The agent does *NOT* simply report back the output of
a pass-through script "blind" - that's the role of the
"exec" and "sh" directives.

With "exec" and "sh", the agent moulds the MIB structure
to match the output of the command.  With "pass", the
script must mould its output to the needs of the agent.



Please note too that the

	exec OID ....

style is being deprecated, and will be phased out
at some time in the future.  If you're using 5.2 or
above, you may wish to investigate the replacement

	extend OID ....

directive, which works in a similar way, but provides
a much more flexible (and legal!) output format.

Dave
> 


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