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-rw-r--r--contrib/imkmsg/Makefile.am8
-rw-r--r--contrib/imkmsg/Makefile.in807
-rw-r--r--contrib/imkmsg/imkmsg.c372
-rw-r--r--contrib/imkmsg/imkmsg.h78
-rw-r--r--contrib/imkmsg/kmsg.c327
5 files changed, 1592 insertions, 0 deletions
diff --git a/contrib/imkmsg/Makefile.am b/contrib/imkmsg/Makefile.am
new file mode 100644
index 0000000..87c177d
--- /dev/null
+++ b/contrib/imkmsg/Makefile.am
@@ -0,0 +1,8 @@
+pkglib_LTLIBRARIES = imkmsg.la
+imkmsg_la_SOURCES = imkmsg.c imkmsg.h
+
+imkmsg_la_SOURCES += kmsg.c
+
+imkmsg_la_CPPFLAGS = -I$(top_srcdir) $(PTHREADS_CFLAGS) $(RSRT_CFLAGS)
+imkmsg_la_LDFLAGS = -module -avoid-version
+imkmsg_la_LIBADD =
diff --git a/contrib/imkmsg/Makefile.in b/contrib/imkmsg/Makefile.in
new file mode 100644
index 0000000..e58e4ff
--- /dev/null
+++ b/contrib/imkmsg/Makefile.in
@@ -0,0 +1,807 @@
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+# with or without modifications, as long as this notice is preserved.
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+@am__fastdepCC_TRUE@ $(LTCOMPILE) -MT $@ -MD -MP -MF $$depbase.Tpo -c -o $@ $< &&\
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+@am__fastdepCC_TRUE@ $(AM_V_CC)$(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(imkmsg_la_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -MT imkmsg_la-imkmsg.lo -MD -MP -MF $(DEPDIR)/imkmsg_la-imkmsg.Tpo -c -o imkmsg_la-imkmsg.lo `test -f 'imkmsg.c' || echo '$(srcdir)/'`imkmsg.c
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+
+imkmsg_la-kmsg.lo: kmsg.c
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+mostlyclean-libtool:
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+
+.PRECIOUS: Makefile
+
+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/contrib/imkmsg/imkmsg.c b/contrib/imkmsg/imkmsg.c
new file mode 100644
index 0000000..9018b0b
--- /dev/null
+++ b/contrib/imkmsg/imkmsg.c
@@ -0,0 +1,372 @@
+/* The kernel log module.
+ *
+ * This is rsyslog Linux only module for reading structured kernel logs.
+ * Module is based on imklog module so it retains its structure
+ * and other part is currently in kmsg.c file instead of this (imkmsg.c)
+ * For more information see that file.
+ *
+ * To test under Linux:
+ * echo test1 > /dev/kmsg
+ *
+ * Copyright (C) 2008-2023 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 <assert.h>
+#include <string.h>
+#include <stdarg.h>
+#include <ctype.h>
+#include <stdlib.h>
+#include <sys/socket.h>
+
+#include "dirty.h"
+#include "cfsysline.h"
+#include "obj.h"
+#include "msg.h"
+#include "module-template.h"
+#include "datetime.h"
+#include "imkmsg.h"
+#include "net.h"
+#include "glbl.h"
+#include "prop.h"
+#include "errmsg.h"
+#include "unicode-helper.h"
+
+MODULE_TYPE_INPUT
+MODULE_TYPE_NOKEEP
+MODULE_CNFNAME("imkmsg")
+
+/* Module static data */
+DEF_IMOD_STATIC_DATA
+DEFobjCurrIf(datetime)
+DEFobjCurrIf(glbl)
+DEFobjCurrIf(prop)
+DEFobjCurrIf(net)
+
+/* config settings */
+typedef struct configSettings_s {
+ int iFacilIntMsg; /* the facility to use for internal messages (set by driver) */
+} configSettings_t;
+static configSettings_t cs;
+
+static modConfData_t *loadModConf = NULL;/* modConf ptr to use for the current load process */
+static modConfData_t *runModConf = NULL;/* modConf ptr to use for the current load process */
+static int bLegacyCnfModGlobalsPermitted;/* are legacy module-global config parameters permitted? */
+
+/* module-global parameters */
+static struct cnfparamdescr modpdescr[] = {
+ { "parsekerneltimestamp", eCmdHdlrGetWord, 0 },
+ { "readmode", eCmdHdlrGetWord, 0 },
+ { "expectedbootcompleteseconds", eCmdHdlrPositiveInt, 0 }
+};
+static struct cnfparamblk modpblk =
+ { CNFPARAMBLK_VERSION,
+ sizeof(modpdescr)/sizeof(struct cnfparamdescr),
+ modpdescr
+ };
+
+static prop_t *pInputName = NULL;
+/* there is only one global inputName for all messages generated by this module */
+static prop_t *pLocalHostIP = NULL; /* a pseudo-constant propterty for 127.0.0.1 */
+
+static inline void
+initConfigSettings(void)
+{
+ cs.iFacilIntMsg = klogFacilIntMsg();
+}
+
+
+/* enqueue the the kernel message into the message queue.
+ * The provided msg string is not freed - thus must be done
+ * by the caller.
+ * rgerhards, 2008-04-12
+ */
+static rsRetVal
+enqMsg(uchar *msg, uchar* pszTag, syslog_pri_t pri, struct timeval *tp, struct json_object *json)
+{
+ struct syslogTime st;
+ smsg_t *pMsg;
+ DEFiRet;
+
+ assert(msg != NULL);
+ assert(pszTag != NULL);
+
+ if(tp == NULL) {
+ CHKiRet(msgConstruct(&pMsg));
+ } else {
+ datetime.timeval2syslogTime(tp, &st, TIME_IN_LOCALTIME);
+ CHKiRet(msgConstructWithTime(&pMsg, &st, tp->tv_sec));
+ }
+ MsgSetFlowControlType(pMsg, eFLOWCTL_LIGHT_DELAY);
+ MsgSetInputName(pMsg, pInputName);
+ MsgSetRawMsgWOSize(pMsg, (char*)msg);
+ MsgSetMSGoffs(pMsg, 0); /* we do not have a header... */
+ MsgSetRcvFrom(pMsg, glbl.GetLocalHostNameProp());
+ MsgSetRcvFromIP(pMsg, pLocalHostIP);
+ MsgSetHOSTNAME(pMsg, glbl.GetLocalHostName(), ustrlen(glbl.GetLocalHostName()));
+ MsgSetTAG(pMsg, pszTag, ustrlen(pszTag));
+ msgSetPRI(pMsg, pri);
+ pMsg->json = json;
+ CHKiRet(submitMsg2(pMsg));
+
+finalize_it:
+ RETiRet;
+}
+
+
+/* log an imkmsg-internal message
+ * rgerhards, 2008-04-14
+ */
+rsRetVal imkmsgLogIntMsg(syslog_pri_t priority, const char *fmt, ...)
+{
+ DEFiRet;
+ va_list ap;
+ uchar msgBuf[2048]; /* we use the same size as sysklogd to remain compatible */
+
+ va_start(ap, fmt);
+ vsnprintf((char*)msgBuf, sizeof(msgBuf), fmt, ap);
+ va_end(ap);
+
+ logmsgInternal(NO_ERRCODE, priority, msgBuf, 0);
+
+ RETiRet;
+}
+
+
+/* log a message from /dev/kmsg
+ */
+rsRetVal Syslog(syslog_pri_t priority, uchar *pMsg, struct timeval *tp, struct json_object *json)
+{
+ DEFiRet;
+ iRet = enqMsg((uchar*)pMsg, (uchar*) "kernel:", priority, tp, json);
+ RETiRet;
+}
+
+
+/* helper for some klog drivers which need to know the MaxLine global setting. They can
+ * not obtain it themselfs, because they are no modules and can not query the object hander.
+ * It would probably be a good idea to extend the interface to support it, but so far
+ * we create a (sufficiently valid) work-around. -- rgerhards, 2008-11-24
+ */
+int klog_getMaxLine(void)
+{
+ return glbl.GetMaxLine(runModConf->pConf);
+}
+
+
+BEGINrunInput
+CODESTARTrunInput
+ /* this is an endless loop - it is terminated when the thread is
+ * signalled to do so. This, however, is handled by the framework,
+ * right into the sleep below.
+ */
+ while(!pThrd->bShallStop) {
+ /* klogLogKMsg() waits for the next kernel message, obtains it
+ * and then submits it to the rsyslog main queue.
+ * rgerhards, 2008-04-09
+ */
+ CHKiRet(klogLogKMsg(runModConf));
+ }
+finalize_it:
+ENDrunInput
+
+
+BEGINbeginCnfLoad
+CODESTARTbeginCnfLoad
+ loadModConf = pModConf;
+ pModConf->pConf = pConf;
+ /* init our settings */
+ pModConf->iFacilIntMsg = klogFacilIntMsg();
+ pModConf->parseKernelStamp = KMSG_PARSE_TS_STARTUP_ONLY;
+ pModConf->readMode = KMSG_READMODE_FULL_BOOT;
+ pModConf->expected_boot_complete_secs = 90;
+ loadModConf->configSetViaV2Method = 0;
+ bLegacyCnfModGlobalsPermitted = 1;
+ /* init legacy config vars */
+ initConfigSettings();
+ENDbeginCnfLoad
+
+
+BEGINsetModCnf
+ struct cnfparamvals *pvals = NULL;
+ int i;
+CODESTARTsetModCnf
+ pvals = nvlstGetParams(lst, &modpblk, NULL);
+ if(pvals == NULL) {
+ LogError(0, RS_RET_MISSING_CNFPARAMS, "error processing module "
+ "config parameters [module(...)]");
+ ABORT_FINALIZE(RS_RET_MISSING_CNFPARAMS);
+ }
+
+ if(Debug) {
+ dbgprintf("module (global) param blk for imkmsg:\n");
+ cnfparamsPrint(&modpblk, pvals);
+ }
+
+ for(i = 0 ; i < modpblk.nParams ; ++i) {
+ if(!pvals[i].bUsed)
+ continue;
+ if(!strcmp(modpblk.descr[i].name, "parsekerneltimestamp")) {
+ if( !es_strconstcmp(pvals[i].val.d.estr, "on")
+ || !es_strconstcmp(pvals[i].val.d.estr, "always")) {
+ loadModConf->parseKernelStamp = KMSG_PARSE_TS_ALWAYS;
+ } else if(!es_strconstcmp(pvals[i].val.d.estr, "startup")) {
+ loadModConf->parseKernelStamp = KMSG_PARSE_TS_STARTUP_ONLY;
+ } else if(!es_strconstcmp(pvals[i].val.d.estr, "off")) {
+ loadModConf->parseKernelStamp = KMSG_PARSE_TS_OFF;
+ } else {
+ const char *const cstr = es_str2cstr(pvals[i].val.d.estr, NULL);
+ LogError(0, RS_RET_PARAM_ERROR, "imkmsg: unknown "
+ "parse mode '%s'", cstr);
+ free((void*)cstr);
+ }
+ } else if(!strcmp(modpblk.descr[i].name, "expectedbootcompleteseconds")) {
+ loadModConf->expected_boot_complete_secs = pvals[i].val.d.n;
+ } else if(!strcmp(modpblk.descr[i].name, "readmode")) {
+ if(!es_strconstcmp(pvals[i].val.d.estr, "full-boot")) {
+ loadModConf->readMode = KMSG_READMODE_FULL_BOOT;
+ } else if(!es_strconstcmp(pvals[i].val.d.estr, "full-always")) {
+ loadModConf->readMode = KMSG_READMODE_FULL_ALWAYS;
+ } else if(!es_strconstcmp(pvals[i].val.d.estr, "new-only")) {
+ loadModConf->readMode = KMSG_READMODE_NEW_ONLY;
+ } else {
+ const char *const cstr = es_str2cstr(pvals[i].val.d.estr, NULL);
+ LogError(0, RS_RET_PARAM_ERROR, "imkmsg: unknown "
+ "read mode '%s', keeping default setting", cstr);
+ free((void*)cstr);
+ }
+ } else {
+ LogMsg(0, RS_RET_INTERNAL_ERROR, LOG_WARNING,
+ "imkmsg: RSYSLOG BUG, non-handled param '%s' in "
+ "beginCnfLoad\n", modpblk.descr[i].name);
+ }
+ }
+
+ /* disable legacy module-global config directives */
+ bLegacyCnfModGlobalsPermitted = 0;
+ loadModConf->configSetViaV2Method = 1;
+
+finalize_it:
+ if(pvals != NULL)
+ cnfparamvalsDestruct(pvals, &modpblk);
+ENDsetModCnf
+
+
+BEGINendCnfLoad
+CODESTARTendCnfLoad
+ if(!loadModConf->configSetViaV2Method) {
+ /* persist module-specific settings from legacy config system */
+ loadModConf->iFacilIntMsg = cs.iFacilIntMsg;
+ }
+
+ loadModConf = NULL; /* done loading */
+ENDendCnfLoad
+
+
+BEGINcheckCnf
+CODESTARTcheckCnf
+ENDcheckCnf
+
+
+BEGINactivateCnfPrePrivDrop
+CODESTARTactivateCnfPrePrivDrop
+ runModConf = pModConf;
+ iRet = klogWillRunPrePrivDrop(runModConf);
+ENDactivateCnfPrePrivDrop
+
+
+BEGINactivateCnf
+CODESTARTactivateCnf
+ENDactivateCnf
+
+
+BEGINfreeCnf
+CODESTARTfreeCnf
+ENDfreeCnf
+
+
+BEGINwillRun
+CODESTARTwillRun
+ iRet = klogWillRunPostPrivDrop(runModConf);
+ENDwillRun
+
+
+BEGINafterRun
+CODESTARTafterRun
+ iRet = klogAfterRun(runModConf);
+ENDafterRun
+
+
+BEGINmodExit
+CODESTARTmodExit
+ if(pInputName != NULL)
+ prop.Destruct(&pInputName);
+ if(pLocalHostIP != NULL)
+ prop.Destruct(&pLocalHostIP);
+
+ /* release objects we used */
+ objRelease(glbl, CORE_COMPONENT);
+ objRelease(net, CORE_COMPONENT);
+ objRelease(datetime, CORE_COMPONENT);
+ objRelease(prop, CORE_COMPONENT);
+ENDmodExit
+
+
+BEGINqueryEtryPt
+CODESTARTqueryEtryPt
+CODEqueryEtryPt_STD_IMOD_QUERIES
+CODEqueryEtryPt_STD_CONF2_QUERIES
+CODEqueryEtryPt_STD_CONF2_PREPRIVDROP_QUERIES
+CODEqueryEtryPt_STD_CONF2_setModCnf_QUERIES
+ENDqueryEtryPt
+
+static rsRetVal resetConfigVariables(uchar __attribute__((unused)) *pp, void __attribute__((unused)) *pVal)
+{
+ cs.iFacilIntMsg = klogFacilIntMsg();
+ return RS_RET_OK;
+}
+
+BEGINmodInit()
+CODESTARTmodInit
+ *ipIFVersProvided = CURR_MOD_IF_VERSION; /* we only support the current interface specification */
+CODEmodInit_QueryRegCFSLineHdlr
+ CHKiRet(objUse(datetime, CORE_COMPONENT));
+ CHKiRet(objUse(glbl, CORE_COMPONENT));
+ CHKiRet(objUse(prop, CORE_COMPONENT));
+ CHKiRet(objUse(net, CORE_COMPONENT));
+
+ /* we need to create the inputName property (only once during our lifetime) */
+ CHKiRet(prop.CreateStringProp(&pInputName, UCHAR_CONSTANT("imkmsg"), sizeof("imkmsg") - 1));
+ CHKiRet(prop.CreateStringProp(&pLocalHostIP, UCHAR_CONSTANT("127.0.0.1"), sizeof("127.0.0.1") - 1));
+
+ /* init legacy config settings */
+ initConfigSettings();
+
+ CHKiRet(omsdRegCFSLineHdlr((uchar *)"debugprintkernelsymbols", 0, eCmdHdlrGoneAway,
+ NULL, NULL, STD_LOADABLE_MODULE_ID));
+ CHKiRet(omsdRegCFSLineHdlr((uchar *)"klogsymbollookup", 0, eCmdHdlrGoneAway,
+ NULL, NULL, STD_LOADABLE_MODULE_ID));
+ CHKiRet(omsdRegCFSLineHdlr((uchar *)"klogsymbolstwice", 0, eCmdHdlrGoneAway,
+ NULL, NULL, STD_LOADABLE_MODULE_ID));
+ CHKiRet(omsdRegCFSLineHdlr((uchar *)"klogusesyscallinterface", 0, eCmdHdlrGoneAway,
+ NULL, NULL, STD_LOADABLE_MODULE_ID));
+ CHKiRet(omsdRegCFSLineHdlr((uchar *)"resetconfigvariables", 1, eCmdHdlrCustomHandler,
+ resetConfigVariables, NULL, STD_LOADABLE_MODULE_ID));
+ENDmodInit
diff --git a/contrib/imkmsg/imkmsg.h b/contrib/imkmsg/imkmsg.h
new file mode 100644
index 0000000..0021f25
--- /dev/null
+++ b/contrib/imkmsg/imkmsg.h
@@ -0,0 +1,78 @@
+/* imkmsg.h
+ * These are the definitions for the kmsg message generation module.
+ *
+ * Copyright 2007-2023 Rainer Gerhards and 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.
+ */
+#ifndef IMKLOG_H_INCLUDED
+#define IMKLOG_H_INCLUDED 1
+
+#include "rsyslog.h"
+#include "dirty.h"
+
+typedef enum _kernel_ts_parse_mods {
+ KMSG_PARSE_TS_OFF = 0,
+ KMSG_PARSE_TS_ALWAYS = 1,
+ KMSG_PARSE_TS_STARTUP_ONLY = 2
+ } t_kernel_ts_parse_mode;
+
+typedef enum _kernel_readmode {
+ KMSG_READMODE_FULL_BOOT = 0,
+ KMSG_READMODE_FULL_ALWAYS = 1,
+ KMSG_READMODE_NEW_ONLY = 2
+ } t_kernel_readmode;
+
+/* we need to have the modConf type present in all submodules */
+struct modConfData_s {
+ rsconf_t *pConf;
+ int iFacilIntMsg;
+ uchar *pszPath;
+ int console_log_level;
+ int expected_boot_complete_secs;
+ t_kernel_ts_parse_mode parseKernelStamp;
+ t_kernel_readmode readMode;
+ sbool configSetViaV2Method;
+};
+
+/* interface to "drivers"
+ * the platform specific drivers must implement these entry points. Only one
+ * driver may be active at any given time, thus we simply rely on the linker
+ * to resolve the addresses.
+ * rgerhards, 2008-04-09
+ */
+rsRetVal klogLogKMsg(modConfData_t *pModConf);
+rsRetVal klogWillRunPrePrivDrop(modConfData_t *pModConf);
+rsRetVal klogWillRunPostPrivDrop(modConfData_t *pModConf);
+rsRetVal klogAfterRun(modConfData_t *pModConf);
+int klogFacilIntMsg();
+
+/* the functions below may be called by the drivers */
+rsRetVal imkmsgLogIntMsg(syslog_pri_t priority, const char *fmt, ...) __attribute__((format(printf,2, 3)));
+rsRetVal Syslog(syslog_pri_t priority, uchar *msg, struct timeval *tp, struct json_object *json);
+int klogFacilIntMsg(void);
+
+/* prototypes */
+extern int klog_getMaxLine(void); /* work-around for klog drivers to get configured max line size */
+extern int InitKsyms(modConfData_t*);
+extern void DeinitKsyms(void);
+extern int InitMsyms(void);
+extern void DeinitMsyms(void);
+extern char * ExpandKadds(char *, char *);
+extern void SetParanoiaLevel(int);
+
+#endif /* #ifndef IMKLOG_H_INCLUDED */
diff --git a/contrib/imkmsg/kmsg.c b/contrib/imkmsg/kmsg.c
new file mode 100644
index 0000000..2548634
--- /dev/null
+++ b/contrib/imkmsg/kmsg.c
@@ -0,0 +1,327 @@
+/* imkmsg driver for Linux /dev/kmsg structured logging
+ *
+ * This contains Linux-specific functionality to read /dev/kmsg
+ * For a general overview, see head comment in imkmsg.c.
+ * This is heavily based on imklog bsd.c file.
+ *
+ * Copyright 2008-2023 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.
+ */
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+#include <stdlib.h>
+#include <time.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <string.h>
+#include <ctype.h>
+#include <sys/klog.h>
+#include <sys/sysinfo.h>
+#include <sys/time.h>
+#include <json.h>
+
+#include "rsyslog.h"
+#include "srUtils.h"
+#include "debug.h"
+#include "imkmsg.h"
+
+/* globals */
+static int fklog = -1; /* kernel log fd */
+static int bInInitialReading = 1; /* are we in the intial kmsg reading phase? */
+/* Note: There is a problem with kernel log time.
+ * See https://github.com/troglobit/sysklogd/commit/9f6fbb3301e571d8af95f8d771469291384e9e95
+ * We use the same work-around if bFixKernelStamp is on, and use the kernel log time
+ * only for past records, which we assume to be from recent boot. Later on, we do not
+ * use them but system time.
+ * UNFORTUNATELY, with /dev/kmsg, we always get old messages on startup. That means we
+ * may also pull old messages. We do not address this right now, as for 10 years "old
+ * messages" was pretty acceptable. So we wait until someone complains. Hint: we could
+ * do a seek to the end of kmsg if desired to not pull old messages.
+ * 2023-10-31 rgerhards
+ */
+
+#ifndef _PATH_KLOG
+# define _PATH_KLOG "/dev/kmsg"
+#endif
+
+/* submit a message to imkmsg Syslog() API. In this function, we parse
+ * necessary information from kernel log line, and make json string
+ * from the rest.
+ */
+static void
+submitSyslog(modConfData_t *const pModConf, const uchar *buf)
+{
+ long offs = 0;
+ struct timeval tv;
+ struct timeval *tp = NULL;
+ struct sysinfo info;
+ unsigned long int timestamp = 0;
+ char name[1024];
+ char value[1024];
+ char msg[1024];
+ syslog_pri_t priority = 0;
+ long int sequnum = 0;
+ struct json_object *json = NULL, *jval;
+
+ /* create new json object */
+ json = json_object_new_object();
+
+ /* get priority */
+ for (; isdigit(*buf); buf++) {
+ priority = (priority * 10) + (*buf - '0');
+ }
+ buf++;
+
+ /* get messages sequence number and add it to json */
+ for (; isdigit(*buf); buf++) {
+ sequnum = (sequnum * 10) + (*buf - '0');
+ }
+ buf++; /* skip , */
+ jval = json_object_new_int(sequnum);
+ json_object_object_add(json, "sequnum", jval);
+
+ /* get timestamp */
+ for (; isdigit(*buf); buf++) {
+ timestamp = (timestamp * 10) + (*buf - '0');
+ }
+
+ while (*buf != ';') {
+ buf++; /* skip everything till the first ; */
+ }
+ buf++; /* skip ; */
+
+ /* get message */
+ offs = 0;
+ for (; *buf != '\n' && *buf != '\0'; buf++, offs++) {
+ msg[offs] = *buf;
+ }
+ msg[offs] = '\0';
+ jval = json_object_new_string((char*)msg);
+ json_object_object_add(json, "msg", jval);
+
+ if (*buf != '\0') /* message has appended properties, skip \n */
+ buf++;
+
+ while (*buf) {
+ /* get name of the property */
+ buf++; /* skip ' ' */
+ offs = 0;
+ for (; *buf != '=' && *buf != ' '; buf++, offs++) {
+ name[offs] = *buf;
+ }
+ name[offs] = '\0';
+ buf++; /* skip = or ' ' */;
+
+ offs = 0;
+ for (; *buf != '\n' && *buf != '\0'; buf++, offs++) {
+ value[offs] = *buf;
+ }
+ value[offs] = '\0';
+ if (*buf != '\0') {
+ buf++; /* another property, skip \n */
+ }
+
+ jval = json_object_new_string((char*)value);
+ json_object_object_add(json, name, jval);
+ }
+
+ if( (pModConf->parseKernelStamp == KMSG_PARSE_TS_ALWAYS)
+ || ((pModConf->parseKernelStamp == KMSG_PARSE_TS_STARTUP_ONLY) && bInInitialReading) ) {
+ /* calculate timestamp */
+ sysinfo(&info);
+ gettimeofday(&tv, NULL);
+
+ /* get boot time */
+ tv.tv_sec -= info.uptime;
+
+ tv.tv_sec += timestamp / 1000000;
+ tv.tv_usec += timestamp % 1000000;
+
+ while (tv.tv_usec < 0) {
+ tv.tv_sec--;
+ tv.tv_usec += 1000000;
+ }
+
+ while (tv.tv_usec >= 1000000) {
+ tv.tv_sec++;
+ tv.tv_usec -= 1000000;
+ }
+
+ tp = &tv;
+ }
+
+ Syslog(priority, (uchar *)msg, tp, json);
+}
+
+
+/* open the kernel log - will be called inside the willRun() imkmsg entry point
+ */
+rsRetVal
+klogWillRunPrePrivDrop(modConfData_t __attribute__((unused)) *pModConf)
+{
+ char errmsg[2048];
+ DEFiRet;
+
+ fklog = open(_PATH_KLOG, O_RDONLY | O_NONBLOCK, 0);
+ if (fklog < 0) {
+ imkmsgLogIntMsg(LOG_ERR, "imkmsg: cannot open kernel log (%s): %s.",
+ _PATH_KLOG, rs_strerror_r(errno, errmsg, sizeof(errmsg)));
+ ABORT_FINALIZE(RS_RET_ERR_OPEN_KLOG);
+ }
+
+finalize_it:
+ RETiRet;
+}
+
+/* make sure the kernel log is readable after dropping privileges
+ */
+rsRetVal
+klogWillRunPostPrivDrop(modConfData_t __attribute__((unused)) *pModConf)
+{
+ char errmsg[2048];
+ int r;
+ DEFiRet;
+
+ /* this normally returns EINVAL */
+ /* on an OpenVZ VM, we get EPERM */
+ r = read(fklog, NULL, 0);
+ if (r < 0 && errno != EINVAL && errno != EAGAIN && errno != EWOULDBLOCK) {
+ imkmsgLogIntMsg(LOG_ERR, "imkmsg: cannot open kernel log (%s): %s.",
+ _PATH_KLOG, rs_strerror_r(errno, errmsg, sizeof(errmsg)));
+ fklog = -1;
+ ABORT_FINALIZE(RS_RET_ERR_OPEN_KLOG);
+ }
+
+finalize_it:
+ RETiRet;
+}
+
+
+static void
+change_reads_to_blocking(const int fd)
+{
+ const int flags = fcntl(fd, F_GETFL, 0);
+ fcntl(fd, F_SETFL, flags & ~O_NONBLOCK);
+}
+
+/* Read kernel log while data are available, each read() reads one
+ * record of printk buffer.
+ */
+static void
+readkmsg(modConfData_t *const pModConf)
+{
+ int i;
+ uchar pRcv[16*1024+1];
+ char errmsg[2048];
+ off_t seek_result = 0;
+
+ if(pModConf->readMode == KMSG_READMODE_FULL_BOOT) {
+ struct sysinfo info;
+ sysinfo(&info);
+ DBGPRINTF("imkmsg: system uptime is %lld, expected %d\n",
+ (long long) info.uptime, pModConf->expected_boot_complete_secs);
+ if(info.uptime > pModConf->expected_boot_complete_secs) {
+ seek_result = lseek(fklog, 0, SEEK_END);
+ }
+ } else if(pModConf->readMode == KMSG_READMODE_NEW_ONLY) {
+ seek_result = lseek(fklog, 0, SEEK_END);
+ } else if(pModConf->readMode != KMSG_READMODE_FULL_ALWAYS) {
+ imkmsgLogIntMsg(LOG_ERR, "imkmsg: internal program error, "
+ "unknown read mode %d, assuming 'full-always'",
+ pModConf->readMode);
+ }
+
+ if(seek_result == (off_t) -1) {
+ imkmsgLogIntMsg(LOG_WARNING,
+ "imkmsg: could not seek to requested klog entries - will"
+ "now potentially output all messages");
+ }
+
+ for (;;) {
+ dbgprintf("imkmsg waiting for kernel log line\n");
+
+ /* every read() from the opened device node receives one record of the printk buffer */
+ i = read(fklog, pRcv, 8192);
+ if (i > 0) {
+ /* successful read of message of nonzero length */
+ pRcv[i] = '\0';
+ } else if (i < 0 && errno == EPIPE) {
+ imkmsgLogIntMsg(LOG_WARNING,
+ "imkmsg: some messages in circular buffer got overwritten");
+ continue;
+ } else {
+ /* something went wrong - error or zero length message */
+ if(i < 0 && (errno == EAGAIN || errno == EWOULDBLOCK)) {
+ DBGPRINTF("imkmsg: initial read done, changing to blocking mode\n");
+ change_reads_to_blocking(fklog);
+ bInInitialReading = 0;
+ continue;
+ }
+ if(i < 0 && errno != EINTR && errno != EAGAIN) {
+ /* error occurred */
+ imkmsgLogIntMsg(LOG_ERR,
+ "imkmsg: error reading kernel log - shutting down: %s",
+ rs_strerror_r(errno, errmsg, sizeof(errmsg)));
+ fklog = -1;
+ }
+ break;
+ }
+
+ submitSyslog(pModConf, pRcv);
+ }
+}
+
+
+/* to be called in the module's AfterRun entry point
+ * rgerhards, 2008-04-09
+ */
+rsRetVal klogAfterRun(modConfData_t *pModConf)
+{
+ DEFiRet;
+ if(fklog != -1)
+ close(fklog);
+ /* Turn on logging of messages to console, but only if a log level was speficied */
+ if(pModConf->console_log_level != -1)
+ klogctl(7, NULL, 0);
+ RETiRet;
+}
+
+
+/* to be called in the module's WillRun entry point, this is the main
+ * "message pull" mechanism.
+ * rgerhards, 2008-04-09
+ */
+rsRetVal klogLogKMsg(modConfData_t *const pModConf)
+{
+ DEFiRet;
+ readkmsg(pModConf);
+ RETiRet;
+}
+
+
+/* provide the (system-specific) default facility for internal messages
+ * rgerhards, 2008-04-14
+ */
+int
+klogFacilIntMsg(void)
+{
+ return LOG_SYSLOG;
+}
+