tools/omdiscard.c - main - githubmirror/rsyslog

tools/omdiscard.c
158 строк4 KB
Rainer Gerhards
build: normalize object prototypes and remove decl noise
07 фев 2026, 13:32
07 фев 2026, 13:3263a233a
/* omdiscard.c
 * This is the implementation of the built-in discard output module.
 *
 * NOTE: read comments in module-template.h to understand how this file
 *       works!
 *
 * File begun on 2007-07-24 by RGerhards
 *
 * Copyright 2007-2026 Adiscon GmbH.
 *
 * This file is part of rsyslog.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *       -or-
 *       see COPYING.ASL20 in the source distribution
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
#include "config.h"
#include "rsyslog.h"
#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include "syslogd.h"
#include "syslogd-types.h"
#include "omdiscard.h"
#include "module-template.h"
#include "errmsg.h"

MODULE_TYPE_OUTPUT;
MODULE_TYPE_NOKEEP;

/* internal structures
 */
DEF_OMOD_STATIC_DATA;

typedef struct _instanceData {
    EMPTY_STRUCT
} instanceData;

typedef struct wrkrInstanceData {
    instanceData *pData;
} wrkrInstanceData_t;

/* we do not need a createInstance()!
BEGINcreateInstance
CODESTARTcreateInstance;
ENDcreateInstance
*/


BEGINcreateWrkrInstance
    CODESTARTcreateWrkrInstance;
ENDcreateWrkrInstance


BEGINdbgPrintInstInfo
    CODESTARTdbgPrintInstInfo;
    /* do nothing */
ENDdbgPrintInstInfo


BEGINisCompatibleWithFeature
    CODESTARTisCompatibleWithFeature;
    /* we are not compatible with repeated msg reduction feature, so do not allow it */
ENDisCompatibleWithFeature


BEGINtryResume
    CODESTARTtryResume;
ENDtryResume

BEGINdoAction_NoStrings
    CODESTARTdoAction;
    (void)pMsgData; /* Suppress compiler warning on unused var */
    dbgprintf("\n");
    iRet = RS_RET_DISCARDMSG;
ENDdoAction


BEGINfreeInstance
    CODESTARTfreeInstance;
    /* we do not have instance data, so we do not need to
     * do anything here. -- rgerhards, 2007-07-25
     */
ENDfreeInstance


BEGINfreeWrkrInstance
    CODESTARTfreeWrkrInstance;
ENDfreeWrkrInstance


BEGINparseSelectorAct
    CODESTARTparseSelectorAct;
    CODE_STD_STRING_REQUESTparseSelectorAct(0) pData = NULL; /* this action does not have any instance data */
    p = *pp;

    if (*p == '~') {
        dbgprintf("discard\n");
        LogMsg(0, RS_RET_DEPRECATED, LOG_WARNING,
               "warning: ~ action is deprecated, consider "
               "using the 'stop' statement instead");
    } else {
        iRet = RS_RET_CONFLINE_UNPROCESSED;
    }
/* we do not use the macro
 * CODE_STD_FINALIZERparseSelectorAct
 * here as this causes a Coverity ID "false positive" (CID 185431).
 * We don't see an issue with using the copy&pasted code as it is unlikly
 * to change for this (outdated) module.
 */
finalize_it:
    ATTR_UNUSED; /* semi-colon needed according to gcc doc! */
    if (iRet == RS_RET_OK || iRet == RS_RET_OK_WARN || iRet == RS_RET_SUSPENDED) {
        *ppModData = pData;
        *pp = p;
    } else {
        /* cleanup, we failed */
        if (*ppOMSR != NULL) {
            OMSRdestruct(*ppOMSR);
            *ppOMSR = NULL;
        }
    }
/* END modified macro text */
ENDparseSelectorAct


BEGINmodExit
    CODESTARTmodExit;
ENDmodExit


BEGINqueryEtryPt
    CODESTARTqueryEtryPt;
    CODEqueryEtryPt_STD_OMOD_QUERIES;
    CODEqueryEtryPt_STD_OMOD8_QUERIES;
ENDqueryEtryPt


BEGINmodInitNoPredecl(Discard)
    CODESTARTmodInit;
    *ipIFVersProvided = CURR_MOD_IF_VERSION; /* we only support the current interface specification */
    CODEmodInit_QueryRegCFSLineHdlr
ENDmodInit
/*
 * vi:set ai:
 */