Re: Running snmp agent as a thread

On Fri, Aug 5, 2011 at 9:14 AM, jatinder goswami <[email protected]
> wrote:

> I have a requirement to run SNMP Agent as a thread in my application  (The
> application in running on Linux based embedded system).
>
> Following are the changes I have done for same:
> 1. Modified main() function in agent/snmpd.c to snmpd_main().
> 2. Compile snmpd.c as a shared library which is linked in my main
> application.
> 3. Start snmpd_main() function as a thread from my application. The
> argument passed are "-C --rwcommunity=test".
>
> As soon as I start my application, it works for some time, but becomes
> unusable after that(hangs). I see some code in snmpd.c which closes all file
> descriptors.
>
> =====
>  /*
>      * close all non-standard file descriptors we may have
>      * inherited from the shell.
>      */
>     for (i = getdtablesize() - 1; i > 2; --i) {
>         (void) close(i);
>     }
>
> =====
>
> I am not sure why this code is closing all the file descriptors. If this
> code is removed, my application gives page fault.
>
> Have anybody run snmp agent as a thread in Linux.
>

Please use the AgentX protocol instead of running the SNMP agent as a
thread. It will save you *a lot* of time and trouble. An example can be
found here:
http://www.net-snmp.org/tutorial/tutorial-5/toolkit/demon/index.html.

Bart.

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