input stmt: add core engine plumbing

runtime/module-template.h

@@ -353,6 +353,24 @@ finalize_it:\
 }
 
 
+/* newInpInst()
+ * This is basically the equivalent to newActInst() for creating input
+ * module (listener) instances.
+ */
+#define BEGINnewInpInst \
+static rsRetVal newInpInst(struct nvlst *lst)\
+{\
+	DEFiRet;
+
+#define CODESTARTnewInpInst \
+
+#define CODE_STD_FINALIZERnewInpInst
+
+#define ENDnewInpInst \
+	RETiRet;\
+}
+
+
 /* tryResume()
  * This entry point is called to check if a module can resume operations. This
  * happens when a module requested that it be suspended. In suspended state,
@@ -521,6 +539,16 @@ static rsRetVal queryEtryPt(uchar *name, rsRetVal (**pEtryPoint)())\
 	CODEqueryEtryPt_STD_CONF2_CNFNAME_QUERIES 
 
 
+/* the following block is to be added for input modules that support the v2
+ * config system. The config name is also provided.
+ */
+#define CODEqueryEtryPt_STD_CONF2_IMOD_QUERIES \
+	  else if(!strcmp((char*) name, "newInpInst")) {\
+		*pEtryPoint = newInpInst;\
+	} \
+	CODEqueryEtryPt_STD_CONF2_CNFNAME_QUERIES 
+
+
 /* the following block is to be added for modules that require
  * pre priv drop activation support.
  */

runtime/modules.c

@@ -607,6 +607,12 @@ doModInit(rsRetVal (*modInit)(int, int*, rsRetVal(**)(), rsRetVal(*)(), modInfo_
 			CHKiRet((*pNew->modQueryEtryPt)((uchar*)"willRun", &pNew->mod.im.willRun));
 			CHKiRet((*pNew->modQueryEtryPt)((uchar*)"afterRun", &pNew->mod.im.afterRun));
 			pNew->mod.im.bCanRun = 0;
+			localRet = (*pNew->modQueryEtryPt)((uchar*)"newInpInst", &pNew->mod.im.newInpInst);
+			if(localRet == RS_RET_MODULE_ENTRY_POINT_NOT_FOUND) {
+				pNew->mod.om.newActInst = NULL;
+			} else if(localRet != RS_RET_OK) {
+				ABORT_FINALIZE(localRet);
+			}
 			break;
 		case eMOD_OUT:
 			CHKiRet((*pNew->modQueryEtryPt)((uchar*)"freeInstance", &pNew->freeInstance));
@@ -625,7 +631,8 @@ doModInit(rsRetVal (*modInit)(int, int*, rsRetVal(**)(), rsRetVal(*)(), modInfo_
 			else if(localRet != RS_RET_OK)
 				ABORT_FINALIZE(localRet);
 
-			localRet = (*pNew->modQueryEtryPt)((uchar*)"endTransaction", &pNew->mod.om.endTransaction);
+			localRet = (*pNew->modQueryEtryPt)((uchar*)"endTransaction",
+				   &pNew->mod.om.endTransaction);
 			if(localRet == RS_RET_MODULE_ENTRY_POINT_NOT_FOUND) {
 				pNew->mod.om.endTransaction = dummyEndTransaction;
 			} else if(localRet != RS_RET_OK) {

runtime/modules.h

@@ -131,6 +131,7 @@ struct modInfo_s {
 /* TODO: remove? */rsRetVal (*willRun)(void); 		/* check if the current config will be able to run*/
 			rsRetVal (*runInput)(thrdInfo_t*);	/* function to gather input and submit to queue */
 			rsRetVal (*afterRun)(thrdInfo_t*);	/* function to gather input and submit to queue */
+			rsRetVal (*newInpInst)(struct nvlst *lst);
 			int bCanRun;	/* cached value of whether willRun() succeeded */
 		} im;
 		struct {/* data for output modules */

runtime/rsconf.c

@@ -99,6 +99,18 @@ static uchar template_SysklogdFileFormat[] = "\"%TIMESTAMP% %HOSTNAME% %syslogta
 static uchar template_StdJSONFmt[] = "\"{\\\"message\\\":\\\"%msg:::json%\\\",\\\"fromhost\\\":\\\"%HOSTNAME:::json%\\\",\\\"facility\\\":\\\"%syslogfacility-text%\\\",\\\"priority\\\":\\\"%syslogpriority-text%\\\",\\\"timereported\\\":\\\"%timereported:::date-rfc3339%\\\",\\\"timegenerated\\\":\\\"%timegenerated:::date-rfc3339%\\\"}\"";
 /* end templates */
 
+/* tables for interfacing with the v6 config system (as far as we need to) */
+static struct cnfparamdescr inppdescr[] = {
+	{ "name", eCmdHdlrGetWord, 0 },
+	{ "type", eCmdHdlrString, CNFPARAM_REQUIRED }
+};
+static struct cnfparamblk inppblk =
+	{ CNFPARAMBLK_VERSION,
+	  sizeof(inppdescr)/sizeof(struct cnfparamdescr),
+	  inppdescr
+	};
+
+/* forward-definitions */
 void cnfDoCfsysline(char *ln);
 
 /* Standard-Constructor
@@ -373,6 +385,49 @@ finalize_it:
 	return estr;
 }
 
+
+/* Process input() objects */
+rsRetVal
+inputProcessCnf(struct cnfobj *o)
+{
+	struct cnfparamvals *pvals;
+	modInfo_t *pMod;
+	uchar *cnfModName = NULL;
+	void *pModData;
+	action_t *pAction;
+	int typeIdx;
+	DEFiRet;
+
+	pvals = nvlstGetParams(o->nvlst, &inppblk, NULL);
+	if(pvals == NULL) {
+		ABORT_FINALIZE(RS_RET_ERR);
+	}
+	DBGPRINTF("input param blk after inputProcessCnf:\n");
+	cnfparamsPrint(&inppblk, pvals);
+	typeIdx = cnfparamGetIdx(&inppblk, "type");
+	if(pvals[typeIdx].bUsed == 0) {
+		errmsg.LogError(0, RS_RET_CONF_RQRD_PARAM_MISSING, "input type missing");
+		ABORT_FINALIZE(RS_RET_CONF_RQRD_PARAM_MISSING); // TODO: move this into rainerscript handlers
+	}
+	cnfModName = (uchar*)es_str2cstr(pvals[typeIdx].val.d.estr, NULL);
+	if((pMod = module.FindWithCnfName(loadConf, cnfModName, eMOD_IN)) == NULL) {
+		errmsg.LogError(0, RS_RET_MOD_UNKNOWN, "input module name '%s' is unknown", cnfModName);
+		ABORT_FINALIZE(RS_RET_MOD_UNKNOWN);
+	}
+	if(pMod->mod.im.newInpInst == NULL) {
+		errmsg.LogError(0, RS_RET_MOD_NO_INPUT_STMT,
+				"input module '%s' does not support input() statement", cnfModName);
+		ABORT_FINALIZE(RS_RET_MOD_NO_INPUT_STMT);
+	}
+dbgprintf("DDDD: ready to roll...\n");
+	CHKiRet(pMod->mod.im.newInpInst(o->nvlst));
+dbgprintf("DDDD: done calling module entry point\n");
+finalize_it:
+	free(cnfModName);
+	cnfparamvalsDestruct(pvals, &inppblk);
+	RETiRet;
+}
+
 /*------------------------------ interface to flex/bison parser ------------------------------*/
 extern int yylineno;
 
@@ -416,6 +471,9 @@ void cnfDoObj(struct cnfobj *o)
 	case CNFOBJ_ACTION:
 		actionProcessCnf(o);
 		break;
+	case CNFOBJ_INPUT:
+		inputProcessCnf(o);
+		break;
 	case CNFOBJ_TPL:
 		tplProcessCnf(o);
 		break;

runtime/rsyslog.h

@@ -381,6 +381,7 @@ enum rsRetVal_				/** return value. All methods return this if not specified oth
 	RS_RET_MODULE_ALREADY_IN_CONF = -2221, /**< module already in current configuration */
 	RS_RET_PARAM_NOT_PERMITTED = -2222, /**< legacy parameter no longer permitted (usally already set by v2) */
 	RS_RET_NO_JSON_PASSING = -2223, /**< rsyslog core does not support JSON-passing plugin API */
+	RS_RET_MOD_NO_INPUT_STMT = -2224, /**< (input) module does not support input() statement */
 
 	/* RainerScript error messages (range 1000.. 1999) */
 	RS_RET_SYSVAR_NOT_FOUND = 1001, /**< system variable could not be found (maybe misspelled) */