returning an integer value for extend script?

Angelo Höngens

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Oct 9, 2010, 5:47:32 AM10/9/10

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Hey,

I use net-snmp extend scripts a lot in my organization to monitor all kinds of values on linux, freebsd and windows servers, and that's been working great with cacti so far. However, net-snmp seems to return only string datatypes instead of integers. It's not a problem for Cacti, since it automatically does string-to-integer conversion, but I'm starting out with nagios and other software, and it really has problems.

Example:

This extend line:
extend .1.3.6.1.4.1.2021.54.101.0 test "/bin/echo 123"

Gets me the following return value:
UCD-SNMP-MIB::ucdavis.54.101.0.4.1.2.4.116.101.115.116.1 = STRING: "123"

Is there a way I can force net-snmp to return an integer value?

--

With kind regards,

Angelo Höngens

Systems Administrator

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Dave Shield

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Oct 9, 2010, 6:22:55 AM10/9/10

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On 9 October 2010 10:47, Angelo Höngens <A.Ho...@netmatch.nl> wrote:
> Is there a way I can force net-snmp to return an integer value?

Use the return code of the script, rather than the output
See UCD-SNMP-MIB::extResult or NET-SNMP-MIB::nsExtendResult

Dave

Angelo Höngens

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Oct 9, 2010, 12:01:02 PM10/9/10

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On 9-10-2010 12:22, Dave Shield wrote:
> On 9 October 2010 10:47, Angelo Höngens <A.Ho...@netmatch.nl> wrote:
>> Is there a way I can force net-snmp to return an integer value?
>
> Use the return code of the script, rather than the output
> See UCD-SNMP-MIB::extResult or NET-SNMP-MIB::nsExtendResult
>
> Dave

I'm not quite sure what you mean. I only get string values back:

$ snmpwalk -v 1 -c public localhost 1.3.6.1.4.1.2021.54
UCD-SNMP-MIB::ucdavis.54.101.0.1.0 = INTEGER: 1
UCD-SNMP-MIB::ucdavis.54.101.0.2.1.2.4.116.101.115.116 = STRING:
"/bin/echo 123"
UCD-SNMP-MIB::ucdavis.54.101.0.2.1.3.4.116.101.115.116 = ""
UCD-SNMP-MIB::ucdavis.54.101.0.2.1.4.4.116.101.115.116 = ""
UCD-SNMP-MIB::ucdavis.54.101.0.2.1.5.4.116.101.115.116 = INTEGER: 5
UCD-SNMP-MIB::ucdavis.54.101.0.2.1.6.4.116.101.115.116 = INTEGER: 1
UCD-SNMP-MIB::ucdavis.54.101.0.2.1.7.4.116.101.115.116 = INTEGER: 1
UCD-SNMP-MIB::ucdavis.54.101.0.2.1.20.4.116.101.115.116 = INTEGER: 4
UCD-SNMP-MIB::ucdavis.54.101.0.2.1.21.4.116.101.115.116 = INTEGER: 1
UCD-SNMP-MIB::ucdavis.54.101.0.3.1.1.4.116.101.115.116 = STRING: "123"
UCD-SNMP-MIB::ucdavis.54.101.0.3.1.2.4.116.101.115.116 = STRING: "123"
UCD-SNMP-MIB::ucdavis.54.101.0.3.1.3.4.116.101.115.116 = INTEGER: 1
UCD-SNMP-MIB::ucdavis.54.101.0.3.1.4.4.116.101.115.116 = INTEGER: 0

UCD-SNMP-MIB::ucdavis.54.101.0.4.1.2.4.116.101.115.116.1 = STRING: "123"

--

With kind regards,

Angelo Höngens
systems administrator

MCSE on Windows 2003
MCSE on Windows 2000
MS Small Business Specialist

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NetMatch
tourism internet software solutions

Ringbaan Oost 2b
5013 CA Tilburg

+31 (0)13 5811088
+31 (0)13 5821239

A.Ho...@netmatch.nl
www.netmatch.nl
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harijs.k...@gmail.com

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Oct 11, 2017, 4:24:08 AM10/11/17

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By 'return code' he means exit code of a bash script.

#!/bin/sh
exit <your_value>

But the limitation is one Byte, meaning values from 0-255.