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/* omdiscard.c
* This is the implementation of the built-in discard output module.
*
* File begun on 2007-07-24 by RGerhards
*
* Copyright 2007 Rainer Gerhards and Adiscon GmbH.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* A copy of the GPL can be found in the file "COPYING" in this distribution.
*/
#include "config.h"
#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include "rsyslog.h"
#include "syslogd.h"
#include "syslogd-types.h"
#include "omdiscard.h"
/* query feature compatibility
*/
static rsRetVal isCompatibleWithFeature(syslogFeature __attribute__((unused)) eFeat)
{
/* this module is incompatible with all currently-known optional
* syslog features. Turn them on if that changes over time.
*/
return RS_RET_INCOMPATIBLE;
}
/* call the shell action
*/
static rsRetVal doAction(__attribute__((unused)) selector_t *f)
{
dprintf("Discarding message based on selector config\n");
return RS_RET_DISCARDMSG;
}
/* free an instance
*/
static rsRetVal freeInstance(selector_t *f)
{
assert(f != NULL);
return RS_RET_OK;
}
/* try to process a selector action line. Checks if the action
* applies to this module and, if so, processed it. If not, it
* is left untouched. The driver will then call another module
*/
static rsRetVal parseSelectorAct(uchar **pp, selector_t *f)
{
uchar *p;
rsRetVal iRet = RS_RET_CONFLINE_PROCESSED;
assert(pp != NULL);
assert(f != NULL);
p = *pp;
if(*p == '~') {
/* TODO: check the rest of the selector line - error reporting */
dprintf("discard\n");
f->f_type = F_DISCARD;
} else {
iRet = RS_RET_CONFLINE_UNPROCESSED;
}
if(iRet == RS_RET_CONFLINE_PROCESSED)
*pp = p;
return iRet;
}
/* query an entry point
*/
static rsRetVal queryEtryPt(uchar *name, rsRetVal (**pEtryPoint)())
{
if((name == NULL) || (pEtryPoint == NULL))
return RS_RET_PARAM_ERROR;
*pEtryPoint = NULL;
if(!strcmp((char*) name, "doAction")) {
*pEtryPoint = doAction;
} else if(!strcmp((char*) name, "parseSelectorAct")) {
*pEtryPoint = parseSelectorAct;
} else if(!strcmp((char*) name, "isCompatibleWithFeature")) {
*pEtryPoint = isCompatibleWithFeature;
} else if(!strcmp((char*) name, "freeInstance")) {
*pEtryPoint = freeInstance;
}
return(*pEtryPoint == NULL) ? RS_RET_NOT_FOUND : RS_RET_OK;
}
/* initialize the module
*
* Later, much more must be done. So far, we only return a pointer
* to the queryEtryPt() function
* TODO: do interface version checking & handshaking
* iIfVersRequeted is the version of the interface specification that the
* caller would like to see being used. ipIFVersProvided is what we
* decide to provide.
*/
rsRetVal modInitDiscard(int iIFVersRequested __attribute__((unused)), int *ipIFVersProvided, rsRetVal (**pQueryEtryPt)())
{
if((pQueryEtryPt == NULL) || (ipIFVersProvided == NULL))
return RS_RET_PARAM_ERROR;
*ipIFVersProvided = 1; /* so far, we only support the initial definition */
*pQueryEtryPt = queryEtryPt;
return RS_RET_OK;
}
/*
* vi:set ai:
*/
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