Hi Akshay,
I'm sure careful study of the source code would reveal exactly the
circumstances when the program will exit with a non-zero return value.
Maybe one of the developers will chime in, if you're lucky, but
unfortunately I have no time for such study at present.
However, I know of at least one more circumstance where it returns 1. That
being if you give the program faulty command line arguments, whereupon it
will print a help text and exit with status 1.
If you'll permit me to guess, it seems reasonable that snmpget would also
return 1 in other failure modes. For example, if snmpget fails to execute
because the system has too many active processes and cannot allocate a new
PID, I'll bet it doesn't return 0. Likewise if the process receives a kill
signal before finishing. But again, this is just speculation.
BR,
Joel
On Fri, Mar 14, 2014 at 12:35 PM, Ballarpure, Akshay (EXT-Tata Consultancy
Ser - IN/Hyderabad) <akshay.ballarpure....@nsn.com> wrote:
> Thanks Joel for quick response.
>
>
>
> We can get snmp-get response = 1 only in case of timeout or there are any
> other scenarios where we can get it as "1" ?
>
>
>
> --
>
> With regards,
>
> Akshay
>
>
>
> *From:* ext Joel Hansell [mailto:joel.hans...@gmail.com]
> *Sent:* Thursday, March 13, 2014 3:48 PM
> *To:* Ballarpure, Akshay (EXT-Tata Consultancy Ser - IN/Hyderabad)
> *Cc:* net-snmp-users@lists.sourceforge.net
> *Subject:* Re: SNMP get response result
>
>
>
> Hi Akshay,
>
> I'm not part of the dev team, but I can give an educated guess as to why
> it behaves like that.
>
> As you know, the Unix convention for return status is that if the command
> exits normally, it should return 0. It should only return some other number
> if the command failed to execute as expected, and in other words the output
> will not be complete.
>
> In the case of the timeout, that's a failure to reach the Agent (for
> whatever reason), and thus the command is not delivering the requested data
> to the user. So it exits with status 1, to indicate that it failed to
> provide the requested information.
>
> The other failure you posted (No Such Object), however, is a different
> story. Here, there was a response from the Agent, where the Agent is saying
> that the requested OID is not available in its MIB view. The snmpget
> command prints the response and exits, which is considered normal operation.
>
> So, I think there is a certain logic to it. If there is a response, print
> the response and exit with status 0. If there is no response, for some
> reason, exit with error status. It doesn't consider what the content of the
> response is.
>
> If you need to find out if an error was returned from the Agent, then
> you'll have to parse the printed output.
>
>
>
> Best regards,
> Joel Hansell
>
>
>
> On Thu, Mar 13, 2014 at 7:04 AM, Ballarpure, Akshay (EXT-Tata Consultancy
> Ser - IN/Hyderabad) <akshay.ballarpure....@nsn.com> wrote:
>
> Hello,
>
> I would like to know the response of snmp get in case of failure. We are
> getting zero in most of the success cases.
>
> If we can get 1 in case of timeout, shall we use value of "$?" as snmp
> success and failure (0 and 1 respectively) on Solaris box ? please reply
> asap. Thanks
>
>
>
>
>
> TCSH02-fm-1# /opt/MOTcagt/bin/snmpget -v3 -u admin -a SHA -A
> 09618538758384384367 -x AES -X 86095694849620176636 -l authPriv
> 27.182.4.222 1.3.6.1.2.1.1.5.0
>
> SNMPv2-MIB::sysName.0 = STRING: NESIM-60001-ENodeB980
>
> TCSH02-fm-1# echo $?
>
> 0
>
> TCSH02-fm-1# /opt/MOTcagt/bin/snmpget -v3 -u admin -a SHA -A
> 09618538758384384367 -x AES -X 86095694849620176636 -l authPriv
> 27.182.4.222 1.3.6.1.2.1.1.5.01
>
> SNMPv2-MIB::sysName.1 = No Such Object available on this agent at this OID
>
> TCSH02-fm-1# echo $?
>
> 0
>
> TCSH02-fm-1# /opt/MOTcagt/bin/snmpget -v3 -u admin -a SHA -A
> 09618538758384384367 -x AES -X 86095694849620176636 -l authPriv
> 27.182.18.51 1.3.6.1.2.1.1.5.0
>
> SNMPv2-MIB::sysName.0 = STRING: TCSH02-fm-sb
>
> TCSH02-fm-1# /opt/MOTcagt/bin/snmpget -v3 -u admin -a SHA -A
> 09618538758384384367 -x AES -X 86095694849620176636 -l authPriv
> 27.182.18.51 1.3.6.1.2.1.1.5.0
>
> SNMPv2-MIB::sysName.0 = STRING: TCSH02-fm-sb
>
> TCSH02-fm-1# /opt/MOTcagt/bin/snmpget -v3 -u admin -a SHA -A
> 09618538758384384367 -x AES -X 86095694849620176636 -l authPriv
> 27.182.18.48 1.3.6.1.2.1.1.5.0
>
> snmpget: Timeout
>
> TCSH02-fm-1# echo $?
>
> 1
>
>
>
> --
>
> With regards,
>
> Akshay
>
>
>
>
>
>
>
>
>
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