Re: working with tables...

--===============0706845911==
Content-Type: multipart/alternative;
boundary="----=_Part_16284_3167296.1208448006505"

------=_Part_16284_3167296.1208448006505
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit
Content-Disposition: inline

On Thu, Apr 17, 2008 at 3:47 AM, Dave Shield <D.T.Shield@liverpool.ac.uk>
wrote:

> On 17/04/2008, Alejandro Islas <alex.islas@gmail.com> wrote:
> > I tried to use mib2c.container.conf file but mib2c
> > wasn't able to found it
>
> Hmmm... what version of the toolkit are you using?
> mib2c.container.conf has been around since the 5.2 release
> (although the internals have changed significantly since then).
>
> I'm using NET-SNMP version: 5.2.1.2
>
>
> > 1)After using mib2c my .c file only contains create/remove entries
> > functions. As far as I understand, I need to implement a fetch entrie,
> to
> > avoid duplicate row entries..correct???
>
> Sorry - I don't understand what you're asking here.


After using mib2c to generate my code, I noticed that it created a
create_row_entry and a
remove_row_entry functions. I implemented a fetch_row_entry, so that my
code would be able to check
if it doesn't have a previously created entry for a particular index.

>
>
> > 2) Besides including data reading functions (i'm using text files),
>
> What do you mean by "data reading functions"?
> How are you storing the table contents within your module?


I read a text file created by another process. Each line of such text
file contains a row's info
of my table, so my process checks for such entry(using the index) in the
linked list and updated it or create a new entry
if its the first time I received inf of such row.

>
>
> > do I need to do anything else?? I did not do anything to the handler,
> > get_first_data_point and get_next_data_point functions, I left them as
> mib2
> > generated them.
>
> The get_{first,next}_data_point routines need to step through the
> rows of your table - in whatever way is appropriate for your module.
> The template code assumes that the table is held as a linked list
> of individual row entries - if this is how your data reading functions
> store the table, then you probably don't need to change this code
> much (if at all).
> If you are storing the table in a different manner (or pulling it from
> external sources), then you will need to amend these two routines
> to match.


Yes, I'm using the linked list of individual row entries created by
mib2c.

>
>
> > 3) Could you explain (or send me an info link) of how my table handler
> is
> > called by the system?? I don't see where my table list is called on it.
>
> When you register the table, the agent includes this information in
> a list of all the OIDs that it knows about. When it receives a request,
> it searches this list for the appropriate match(es), and calls the
> corresponding handlers.
>
>
> > 4) I used gdb...but didn't help me a lot, it only confirmed a
> segmentation
> > fault.
>
> But it should also indicate *where* this segmentation fault occurs.
> This would help track down what is causing it.


You're right, I think I need to play a little bit more with gbd

>
>
> > I'm not compiling the whole project, only adding my so files using
> > dlmod command. Can I still use dbg using this method or do I need to
> compile
> > the whole deamon including my handlers???
>
> Ummm... not sure.
> It would probably be sensible to start by working with a "traditional"
> approach,
> at least until you get the module working. The same module code can be
> embedded within the main agent, loaded dynamically, or used within a
> subagent - with no changes to the code.
>

I'll try this and let you know.

Alejandro

------=_Part_16284_3167296.1208448006505
Content-Type: text/html; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit
Content-Disposition: inline

<br><br><div class="gmail_quote">On Thu, Apr 17, 2008 at 3:47 AM, Dave Shield &lt;<a href="mailto:D.T.Shield@liverpool.ac.uk">D.T.Shiel d@liverpool.ac.uk</a>&gt; wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div class="Ih2E3d">On 17/04/2008, Alejandro Islas &lt;<a href="mailto:alex.islas@gmail.com">alex.islas@gmai l.com</a>&gt; wrote:<br>
&gt; I tried to use mib2c.container.conf file but mib2c<br>
&gt; wasn't able to found it<br>
<br>
</div>Hmmm... what version of the toolkit are you using?<br>
mib2c.container.conf has been around since the 5.2 release<br>
(although the internals have changed significantly since then).<br>
<div class="Ih2E3d"><br>
<font color="#cc33cc">I'm using NET-SNMP version:&nbsp; <a href="http://5.2.1.2">5.2.1.2</a><br></font><br>
<br>
&gt; &nbsp;1)After using mib2c my .c file only contains create/remove entries<br>
&gt; functions. As far as I understand, I need to implement a fetch entrie, to<br>
&gt; avoid duplicate row entries..correct???<br>
<br>
</div>Sorry - I don't understand what you're asking here.</blockquote><div><br>&nbsp;&nbsp;&nbsp; <font color="#cc33cc">After using mib2c to generate my code, I noticed that it created a create_row_entry and a <br>&nbsp;&nbsp;&nbsp; remove_row_entry functions. I implemented a fetch_row_entry, so that my code would be able to check<br>
&nbsp;&nbsp;&nbsp; if it doesn't have a previously created entry for a particular index.<br></font></div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<br>
<div class="Ih2E3d"><br>
&gt; 2) Besides including data reading functions (i'm using text files),<br>
<br>
</div>What do you mean by &quot;data reading functions&quot;?<br>
How are you storing the table contents within your module?</blockquote><div><br>&nbsp;&nbsp; <font color="#cc33cc">I read a text file created by another process. Each line of such text file contains a row's info<br>&nbsp;&nbsp; of my table, so my process checks for such entry(using the index) in the linked list and updated it or create a new entry<br>
&nbsp; if its the first time I received inf of such row.<br></font></div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><br>
<div class="Ih2E3d"><br>
&gt; do I need to do anything else?? I did not do anything to the handler,<br>
&gt; get_first_data_point and get_next_data_point functions, I left them as mib2<br>
&gt; generated them.<br>
<br>
</div>The get_{first,next}_data_point routines need to step through the<br>
rows of your table - in whatever way is appropriate for your module.<br>
The template code assumes that the table is held as a linked list<br>
of individual row entries - if this is how your data reading functions<br>
store the table, then you probably don't need to change this code<br>
much (if at all).<br>
&nbsp; If you are storing the table in a different manner (or pulling it from<br>
external sources), then you will need to amend these two routines<br>
to match.</blockquote><div><br>&nbsp;&nbsp; <font color="#cc33cc">Yes, I'm using the linked list of individual row entries created by mib2c.</font><br></div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<br>
<div class="Ih2E3d"><br>
&gt; &nbsp;3) Could you explain (or send me an info link) of how my table handler is<br>
&gt; called by the system?? I don't see where my table list is called on it.<br>
<br>
</div>When you register the table, the agent includes this information in<br>
a list of all the OIDs that it knows about. &nbsp; When it receives a request,<br>
it searches this list for the appropriate match(es), and calls the<br>
corresponding handlers.<br>
<div class="Ih2E3d"><br>
<br>
&gt; 4) I used gdb...but didn't help me a lot, it only confirmed a segmentation<br>
&gt; fault.<br>
<br>
</div>But it should also indicate *where* this segmentation fault occurs.<br>
This would help track down what is causing it.</blockquote><div><br>&nbsp; &nbsp; <font color="#cc33cc">You're right, I think I need to play a little bit more with gbd</font> <br></div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<br>
<div class="Ih2E3d"><br>
&gt; &nbsp;I'm not compiling the whole project, only adding my so files using<br>
&gt; dlmod command. Can I still use dbg using this method or do I need to compile<br>
&gt; the whole deamon including my handlers???<br>
<br>
</div>Ummm... not sure.<br>
It would probably be sensible to start by working with a &quot;traditional&quot; approach,<br>
at least until you get the module working. &nbsp; The same module code can be<br>
embedded within the main agent, loaded dynamically, or used within a<br>
subagent - with no changes to the code.<br>
<font color="#888888"></font></blockquote><div>&nbsp;<br>&nbsp;<font color="#cc33cc">I'll try this and let you know.</font> <br></div><div><br><font color="#cc33cc">Alejandro</font> <br></div></div><br>

------=_Part_16284_3167296.1208448006505--


--===============0706845911==
Content-Type: text/plain; charset="us-ascii"
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit
Content-Disposition: inline

-------------------------------------------------------------------------
This SF.net email is sponsored by the 2008 JavaOne(SM) Conference
Don't miss this year's exciting event. There's still time to save $100.
Use priority code J8TL2D2.
http://ad.doubleclick.net/clk;198757...un.com/javaone
--===============0706845911==
Content-Type: text/plain; charset="us-ascii"
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit
Content-Disposition: inline

_______________________________________________
Net-snmp-coders mailing list
Net-snmp-coders@lists.sourceforge.net
https://lists.sourceforge.net/lists/...et-snmp-coders

--===============0706845911==--