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/* The errmsg object.
*
* Module begun 2008-03-05 by Rainer Gerhards, based on some code
* from syslogd.c. I converted this module to lgpl and have checked that
* all contributors agreed to that step.
* Now moving to ASL 2.0, and contributor checks tell that there is no need
* to take further case, as the code now boils to be either my own or, a few lines,
* of the original BSD-licenses sysklogd code. rgerhards, 2012-01-16
*
* Copyright 2008-2013 Adiscon GmbH.
*
* This file is part of the rsyslog runtime library.
*
* 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 <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <errno.h>
#include <assert.h>
#include "rsyslog.h"
#include "obj.h"
#include "errmsg.h"
#include "srUtils.h"
#include "stringbuf.h"
/* static data */
DEFobjStaticHelpers
/* ------------------------------ methods ------------------------------ */
/* We now receive three parameters: one is the internal error code
* which will also become the error message number, the second is
* errno - if it is non-zero, the corresponding error message is included
* in the text and finally the message text itself. Note that it is not
* 100% clean to use the internal errcode, as it may be reached from
* multiple actual error causes. However, it is much better than having
* no error code at all (and in most cases, a single internal error code
* maps to a specific error event).
* rgerhards, 2008-06-27
*/
static void
doLogMsg(const int iErrno, const int iErrCode, const int severity, const char *msg)
{
char buf[2048];
char errStr[1024];
dbgprintf("Called LogMsg, msg: %s\n", msg);
if(iErrno != 0) {
rs_strerror_r(iErrno, errStr, sizeof(errStr));
if(iErrCode == NO_ERRCODE || iErrCode == RS_RET_ERR) {
snprintf(buf, sizeof(buf), "%s: %s", msg, errStr);
} else {
snprintf(buf, sizeof(buf), "%s: %s [try http://www.rsyslog.com/e/%d ]", msg, errStr, iErrCode * -1);
}
} else {
if(iErrCode == NO_ERRCODE || iErrCode == RS_RET_ERR) {
snprintf(buf, sizeof(buf), "%s", msg);
} else {
snprintf(buf, sizeof(buf), "%s [try http://www.rsyslog.com/e/%d ]", msg, iErrCode * -1);
}
}
buf[sizeof(buf)/sizeof(char) - 1] = '\0'; /* just to be on the safe side... */
errno = 0;
glblErrLogger(severity, iErrCode, (uchar*)buf);
}
/* We now receive three parameters: one is the internal error code
* which will also become the error message number, the second is
* errno - if it is non-zero, the corresponding error message is included
* in the text and finally the message text itself. Note that it is not
* 100% clean to use the internal errcode, as it may be reached from
* multiple actual error causes. However, it is much better than having
* no error code at all (and in most cases, a single internal error code
* maps to a specific error event).
* rgerhards, 2008-06-27
*/
static void __attribute__((format(printf, 3, 4)))
LogError(const int iErrno, const int iErrCode, const char *fmt, ... )
{
va_list ap;
char buf[2048];
size_t lenBuf;
va_start(ap, fmt);
lenBuf = vsnprintf(buf, sizeof(buf), fmt, ap);
if(lenBuf >= sizeof(buf)) {
/* if our buffer was too small, we simply truncate. */
lenBuf--;
}
va_end(ap);
buf[sizeof(buf)/sizeof(char) - 1] = '\0'; /* just to be on the safe side... */
doLogMsg(iErrno, iErrCode, LOG_ERR, buf);
}
/* We now receive three parameters: one is the internal error code
* which will also become the error message number, the second is
* errno - if it is non-zero, the corresponding error message is included
* in the text and finally the message text itself. Note that it is not
* 100% clean to use the internal errcode, as it may be reached from
* multiple actual error causes. However, it is much better than having
* no error code at all (and in most cases, a single internal error code
* maps to a specific error event).
* rgerhards, 2008-06-27
*/
static void __attribute__((format(printf, 4, 5)))
LogMsg(const int iErrno, const int iErrCode, const int severity, const char *fmt, ... )
{
va_list ap;
char buf[2048];
size_t lenBuf;
va_start(ap, fmt);
lenBuf = vsnprintf(buf, sizeof(buf), fmt, ap);
if(lenBuf >= sizeof(buf)) {
/* if our buffer was too small, we simply truncate. */
lenBuf--;
}
va_end(ap);
buf[sizeof(buf)/sizeof(char) - 1] = '\0'; /* just to be on the safe side... */
doLogMsg(iErrno, iErrCode, severity, buf);
}
/* queryInterface function
* rgerhards, 2008-03-05
*/
BEGINobjQueryInterface(errmsg)
CODESTARTobjQueryInterface(errmsg)
if(pIf->ifVersion != errmsgCURR_IF_VERSION) { /* check for current version, increment on each change */
ABORT_FINALIZE(RS_RET_INTERFACE_NOT_SUPPORTED);
}
/* ok, we have the right interface, so let's fill it
* Please note that we may also do some backwards-compatibility
* work here (if we can support an older interface version - that,
* of course, also affects the "if" above).
*/
pIf->LogError = LogError;
pIf->LogMsg = LogMsg;
finalize_it:
ENDobjQueryInterface(errmsg)
/* Initialize the errmsg class. Must be called as the very first method
* before anything else is called inside this class.
* rgerhards, 2008-02-19
*/
BEGINAbstractObjClassInit(errmsg, 1, OBJ_IS_CORE_MODULE) /* class, version */
/* request objects we use */
/* set our own handlers */
ENDObjClassInit(errmsg)
/* Exit the class.
* rgerhards, 2008-04-17
*/
BEGINObjClassExit(errmsg, OBJ_IS_CORE_MODULE) /* class, version */
/* release objects we no longer need */
ENDObjClassExit(errmsg)
/* vi:set ai:
*/
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