On Fri, 2005-12-02 at 15:47 -0800, manik chopra wrote:
> Following is a sample of my sub-agent stub file:
>
> unsigned char *var_fnc()
> {
> my_struct *p;
>
> header_simple_table(........)
> { }
I trust you're actually checking the return value of this
routine, to tell whether to continue processing or not?
> if ( fnc(p->value) < 0)
> { return NULL; }
How is 'p' being initialised?
I'd expect you to extract the index from the OID returned
by 'header_simple_table', and use this to select the
appropriate row of the table.
But you don't show any of this code.
> If "( fnc(p->value) < 0)" for 1st node, the function returns null
> and never checks 2nd and the 3rd node for "( fnc(p->value) < 0)".
See above.
How is 'p' set?
> In my case "( fnc(p->value)" will be "> 0" only at the 3rd node. but
> at present if "( fnc(p->value) < 0)" for 1st node, "*var_fnc()" is
> never called again.
Then I'm not quite sure why you are using this particular test?
The 'var_fnc' routine will be called *once* to process *one*
varbind. The utility routine 'header_simple_table' will validate
the request (and update the OID for a GETNEXT request).
Then it's up to you to locate the row that's being asked for,
and return the appropriate column value. If you're asked
for a value from the first row, that's what you should return.
If you're asked for a value from the third row, then that's
what you should return. If you're asked for a value from the
fourth row, then you should return NULL.
With the limited code that you've shown us, it's impossible to
provide any more detailed advice.
Dave
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