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-rw-r--r--tools/syslogd.c194
1 files changed, 189 insertions, 5 deletions
diff --git a/tools/syslogd.c b/tools/syslogd.c
index 8c86c12e..3a751a30 100644
--- a/tools/syslogd.c
+++ b/tools/syslogd.c
@@ -284,6 +284,7 @@ static int gidDropPriv = 0; /* group-id to which priveleges should be dropped to
extern int errno;
+static uchar *pszConfDAGFile = NULL; /* name of config DAG file, non-NULL means generate one */
/* main message queue and its configuration parameters */
static qqueue_t *pMsgQueue = NULL; /* the main message queue */
static int iMainMsgQueueSize = 10000; /* size of the main message queue above */
@@ -1939,10 +1940,9 @@ static void doDie(int sig)
static void
freeAllDynMemForTermination(void)
{
- if(pszMainMsgQFName != NULL)
- free(pszMainMsgQFName);
- if(pModDir != NULL)
- free(pModDir);
+ free(pszMainMsgQFName);
+ free(pModDir);
+ free(pszConfDAGFile);
}
@@ -2210,6 +2210,184 @@ static void freeSelectors(void)
}
+/* helper to generateConfigDAG, to print out all actions via
+ * the llExecFunc() facility.
+ * rgerhards, 2007-08-02
+ */
+struct dag_info {
+ FILE *fp; /* output file */
+ int iActUnit; /* current action unit number */
+ int iAct; /* current action in unit */
+ int bDiscarded; /* message discarded (config error) */
+ };
+DEFFUNC_llExecFunc(generateConfigDAGAction)
+{
+ action_t *pAction;
+ uchar *pszModName;
+ uchar *pszVertexName;
+ struct dag_info *pDagInfo;
+ DEFiRet;
+
+ pDagInfo = (struct dag_info*) pParam;
+ pAction = (action_t*) pData;
+
+ pszModName = module.GetStateName(pAction->pMod);
+
+ /* vertex */
+ if(pAction->pszName == NULL) {
+ if(!strcmp((char*)pszModName, "builtin-discard"))
+ pszVertexName = (uchar*)"discard";
+ else
+ pszVertexName = pszModName;
+ } else {
+ pszVertexName = pAction->pszName;
+ }
+
+ fprintf(pDagInfo->fp, "\tact%d_%d\t\t[label=\"%s\"%s%s]\n",
+ pDagInfo->iActUnit, pDagInfo->iAct, pszVertexName,
+ pDagInfo->bDiscarded ? " style=dotted color=red" : "",
+ (pAction->pQueue->qType == QUEUETYPE_DIRECT) ? "" : " shape=hexagon"
+ );
+
+ /* edge */
+ if(pDagInfo->iAct == 0) {
+ } else {
+ fprintf(pDagInfo->fp, "\tact%d_%d -> act%d_%d[%s%s]\n",
+ pDagInfo->iActUnit, pDagInfo->iAct - 1,
+ pDagInfo->iActUnit, pDagInfo->iAct,
+ pDagInfo->bDiscarded ? " style=dotted color=red" : "",
+ pAction->bExecWhenPrevSusp ? " label=\"only if\\nsuspended\"" : "" );
+ }
+
+ /* check for discard */
+ if(!strcmp((char*) pszModName, "builtin-discard")) {
+ fprintf(pDagInfo->fp, "\tact%d_%d\t\t[shape=box]\n",
+ pDagInfo->iActUnit, pDagInfo->iAct);
+ pDagInfo->bDiscarded = 1;
+ }
+
+
+ ++pDagInfo->iAct;
+
+ RETiRet;
+}
+
+
+/* create config DAG
+ * This functions takes a rsyslog config and produces a .dot file for use
+ * with graphviz (http://www.graphviz.org). This is done in an effort to
+ * document, and also potentially troubleshoot, configurations. Plus, I
+ * consider it a nice feature to explain some concepts. Note that the
+ * current version only produces a graph with relatively little information.
+ * This is a foundation that may be later expanded (if it turns out to be
+ * useful enough).
+ * rgerhards, 2009-05-11
+ */
+static rsRetVal
+generateConfigDAG(uchar *pszDAGFile)
+{
+ selector_t *f;
+ FILE *fp;
+ int iActUnit = 1;
+ int bHasFilter = 0; /* filter associated with this action unit? */
+ int bHadFilter;
+ int i;
+ struct dag_info dagInfo;
+ char *pszFilterName;
+ char szConnectingNode[64];
+ DEFiRet;
+
+ assert(pszDAGFile != NULL);
+
+ if((fp = fopen((char*) pszDAGFile, "w")) == NULL) {
+ logmsgInternal(NO_ERRCODE, LOG_SYSLOG|LOG_INFO, (uchar*)
+ "configuraton graph output file could not be opened, none generated", 0);
+ ABORT_FINALIZE(RS_RET_FILENAME_INVALID);
+ }
+
+ dagInfo.fp = fp;
+
+ /* from here on, we assume writes go well. This here is a really
+ * unimportant utility function and if something goes wrong, it has
+ * almost no effect. So let's not overdo this...
+ */
+ fprintf(fp, "# graph created by rsyslog " VERSION "\n\n"
+ "# use the dot tool from http://www.graphviz.org to visualize!\n"
+ "digraph rsyslogConfig {\n"
+ "\tinputs [shape=tripleoctagon]\n"
+ "\tinputs -> act0_0\n"
+ "\tact0_0 [label=\"main\\nqueue\" shape=hexagon]\n"
+ /*"\tmainq -> act1_0\n"*/
+ );
+ strcpy(szConnectingNode, "act0_0");
+ dagInfo.bDiscarded = 0;
+
+ for(f = Files; f != NULL ; f = f->f_next) {
+ /* BSD-Style filters are currently ignored */
+ bHadFilter = bHasFilter;
+ if(f->f_filter_type == FILTER_PRI) {
+ bHasFilter = 0;
+ for (i = 0; i <= LOG_NFACILITIES; i++)
+ if (f->f_filterData.f_pmask[i] != 0xff) {
+ bHasFilter = 1;
+ break;
+ }
+ } else {
+ bHasFilter = 1;
+ }
+
+ /* we know we have a filter, so it can be false */
+ switch(f->f_filter_type) {
+ case FILTER_PRI:
+ pszFilterName = "pri filter";
+ break;
+ case FILTER_PROP:
+ pszFilterName = "property filter";
+ break;
+ case FILTER_EXPR:
+ pszFilterName = "script filter";
+ break;
+ }
+
+ /* write action unit node */
+ if(bHasFilter) {
+ fprintf(fp, "\t%s -> act%d_end\t[label=\"%s:\\nfalse\"]\n",
+ szConnectingNode, iActUnit, pszFilterName);
+ fprintf(fp, "\t%s -> act%d_0\t[label=\"%s:\\ntrue\"]\n",
+ szConnectingNode, iActUnit, pszFilterName);
+ fprintf(fp, "\tact%d_end\t\t\t\t[shape=point]\n", iActUnit);
+ snprintf(szConnectingNode, sizeof(szConnectingNode), "act%d_end", iActUnit);
+ } else {
+ fprintf(fp, "\t%s -> act%d_0\t[label=\"no filter\"]\n",
+ szConnectingNode, iActUnit);
+ snprintf(szConnectingNode, sizeof(szConnectingNode), "act%d_0", iActUnit);
+ }
+
+ /* draw individual nodes */
+ dagInfo.iActUnit = iActUnit;
+ dagInfo.iAct = 0;
+ dagInfo.bDiscarded = 0;
+ llExecFunc(&f->llActList, generateConfigDAGAction, &dagInfo); /* actions */
+
+ /* finish up */
+ if(bHasFilter && !dagInfo.bDiscarded) {
+ fprintf(fp, "\tact%d_%d -> %s\n",
+ iActUnit, dagInfo.iAct - 1, szConnectingNode);
+ }
+
+ ++iActUnit;
+ }
+
+ fprintf(fp, "\t%s -> act%d_0\n", szConnectingNode, iActUnit);
+ fprintf(fp, "\tact%d_0\t\t[label=discard shape=box]\n"
+ "}\n", iActUnit);
+ fclose(fp);
+
+finalize_it:
+ RETiRet;
+}
+
+
/* helper to dbPrintInitInfo, to print out all actions via
* the llExecFunc() facility.
* rgerhards, 2007-08-02
@@ -2223,6 +2401,7 @@ DEFFUNC_llExecFunc(dbgPrintInitInfoAction)
RETiRet;
}
+
/* print debug information as part of init(). This pretty much
* outputs the whole config of rsyslogd. I've moved this code
* out of init() to clean it somewhat up.
@@ -2230,7 +2409,7 @@ DEFFUNC_llExecFunc(dbgPrintInitInfoAction)
*/
static void dbgPrintInitInfo(void)
{
- register selector_t *f;
+ selector_t *f;
int iSelNbr = 1;
int i;
@@ -2467,6 +2646,10 @@ init(void)
}
}
+ /* check if we need to generate a config DAG and, if so, do that */
+ if(pszConfDAGFile != NULL)
+ generateConfigDAG(pszConfDAGFile);
+
/* we are done checking the config - now validate if we should actually run or not.
* If not, terminate. -- rgerhards, 2008-07-25
*/
@@ -2903,6 +3086,7 @@ static rsRetVal loadBuildInModules(void)
CHKiRet(regCfSysLineHdlr((uchar *)"debugprintcfsyslinehandlerlist", 0, eCmdHdlrBinary,
NULL, &bDebugPrintCfSysLineHandlerList, NULL));
CHKiRet(regCfSysLineHdlr((uchar *)"moddir", 0, eCmdHdlrGetWord, NULL, &pModDir, NULL));
+ CHKiRet(regCfSysLineHdlr((uchar *)"generateconfiggraph", 0, eCmdHdlrGetWord, NULL, &pszConfDAGFile, NULL));
CHKiRet(regCfSysLineHdlr((uchar *)"resetconfigvariables", 1, eCmdHdlrCustomHandler, resetConfigVariables, NULL, NULL));
CHKiRet(regCfSysLineHdlr((uchar *)"errormessagestostderr", 0, eCmdHdlrBinary, NULL, &bErrMsgToStderr, NULL));
CHKiRet(regCfSysLineHdlr((uchar *)"maxmessagesize", 0, eCmdHdlrSize, setMaxMsgSize, NULL, NULL));
generated by cgit (git 2.34.1) at 2024-11-16 04:15:05 +0000