C++ Plugins

[Michael Medin]

Hello,

All the "built in" plugins are avalible as source so it should be pretty 
simple to figure out.
The idea is anyways that you fill the buffer passed to the function from 
the "core".
(this will BTW change in the next major release)

Anyways...
If you are using the "glue" (around the C api) I have written have a 
look at for instance this:
http://nsclient.org/nscp/browser/branches/stable/modules/CheckExternalScripts/CheckExternalScripts.cpp

If not then have a look inside the "glue file":
http://nsclient.org/nscp/browser/branches/stable/include/NSCHelper.cpp

But essential if you are not using the glue:

NSCAPI::nagiosReturn wrapReturnString(char *buffer, unsigned int bufLen, 
std::wstring str, NSCAPI::nagiosReturn defaultReturnCode /* = 
NSCAPI::success */) {
    if (str.length() >= bufLen)
    return NSCAPI::returnInvalidBufferLen;
    strncpy(buffer, str.c_str(), bufLen);
    return defaultReturnCode;
}
extern NSCAPI::nagiosReturn NSHandleCommand(const TCHAR* IN_cmd, const 
unsigned int IN_argsLen, TCHAR **IN_args, TCHAR *OUT_retBufMessage, 
unsigned int IN_retBufMessageLen, TCHAR *OUT_retBufPerf, unsigned int 
IN_retBufPerfLen)
{
    try {
        std::wstring message = _T("my message");
        std::wstring perf = _T("my message");
        NSCAPI::nagiosReturn ret = NSCAPI::returnOK;
       
        // Wrap strings
        ret = wrapReturnString(OUT_retBufMessage, IN_retBufMessageLen, 
message, ret);
        if (ret == NSCAPI::returnInvalidBufferLen) {
            //NSC_LOG_CRITICAL(_T("error in: wrapHandleCommand(...)"));
            return NSCAPI::returnIgnored;
        }
        ret = wrapReturnString(OUT_retBufPerf, IN_retBufPerfLen, perf, ret);
        if (ret == NSCAPI::returnInvalidBufferLen) {
            //NSC_LOG_CRITICAL(_T("error in: wrapHandleCommand(...)"));
            return NSCAPI::returnIgnored;
        }
    } catch (...) {
        //NSC_LOG_CRITICAL(_T("Unknown exception in: 
wrapHandleCommand(...)"));
        return NSCAPI::returnIgnored;
    }
}

In general I would recommend using the glue as it will be simpler to 
upgrade then...

// Michael Medin


Christopher McAtackney skrev:
> Hi all,
>
> I'm trying to develop a plug-in for NSClient++ written in C++, but I'm
> unsure of how to return the status code and the check result string
> (e.g. 2 and "Service is Critical").
>
> Are there any examples of C++ plugins online anywhere that I can use
> as a template?
>
> Cheers,
> Chris
>
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------------------------------------------------------------------------------
Stay on top of everything new and different, both inside and 
around Java (TM) technology - register by April 22, and save
$200 on the JavaOne (SM) conference, June 2-5, 2009, San Francisco.
300 plus technical and hands-on sessions. Register today. 
Use priority code J9JMT32. http://p.sf.net/sfu/p
_______________________________________________
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Nagios-users at lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/nagios-users
::: Please include Nagios version, plugin version (-v) and OS when reporting any issue. 
::: Messages without supporting info will risk being sent to /dev/null