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/* omshell.c
* This is the implementation of the build-in shell output module.
*
* shell support was initially written by bkalkbrenner 2005-09-20
*
* File begun on 2007-07-20 by RGerhards (extracted from syslogd.c)
* This file is under development and has not yet arrived at being fully
* self-contained and a real object. So far, it is mostly an excerpt
* of the "old" message code without any modifications. However, it
* helps to have things at the right place one we go to the meat of it.
*
* 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 "srUtils.h"
#include "omshell.h"
/* query feature compatibility
*/
static rsRetVal isCompatibleWithFeature(syslogFeature eFeat)
{
if(eFeat == sFEATURERepeatedMsgReduction)
return RS_RET_OK;
return RS_RET_INCOMPATIBLE;
}
/* call the shell action
*/
static rsRetVal doActionShell(selector_t *f)
{
uchar *psz;
assert(f != NULL);
/* TODO: using f->f_un.f_file.f_name is not clean from the point of
* modularization. We'll change that as we go ahead with modularization.
* rgerhards, 2007-07-20
*/
dprintf("\n");
iovCreate(f);
psz = (uchar*) iovAsString(f);
if(execProg((uchar*) f->f_un.f_file.f_fname, 1, (uchar*) psz) == 0)
logerrorSz("Executing program '%s' failed", f->f_un.f_file.f_fname);
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;
switch (*p)
{
case '^': /* bkalkbrenner 2005-09-20: execute shell command */
dprintf("exec\n");
++p;
if((iRet = cflineParseFileName(f, p)) == RS_RET_OK)
if (f->f_type == F_FILE) {
f->f_type = F_SHELL;
}
break;
default:
iRet = RS_RET_CONFLINE_UNPROCESSED;
break;
}
if(iRet == RS_RET_OK)
iRet = RS_RET_CONFLINE_PROCESSED;
if(iRet == RS_RET_CONFLINE_PROCESSED)
*pp = p;
return iRet;
}
/* free an instance
*/
static rsRetVal freeInstance(selector_t *f)
{
assert(f != NULL);
return RS_RET_OK;
}
/* 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 = doActionShell;
} 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 modInitShell(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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