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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.
*
* Copyright 2008 Rainer Gerhards and Adiscon GmbH.
*
* This file is part of the rsyslog runtime library.
*
* The rsyslog runtime library is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* The rsyslog runtime library 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with the rsyslog runtime library. If not, see <http://www.gnu.org/licenses/>.
*
* A copy of the GPL can be found in the file "COPYING" in this distribution.
* A copy of the LGPL can be found in the file "COPYING.LESSER" in this distribution.
*/
#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 "sysvar.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 __attribute__((format(printf, 3, 4)))
LogError(int iErrno, int iErrCode, char *fmt, ... )
{
va_list ap;
char buf[1024];
char msg[1024];
char errStr[1024];
size_t lenBuf;
BEGINfunc
assert(fmt != NULL);
/* Format parameters */
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);
/* Log the error now */
buf[sizeof(buf)/sizeof(char) - 1] = '\0'; /* just to be on the safe side... */
dbgprintf("Called LogError, msg: %s\n", buf);
if(iErrno != 0) {
rs_strerror_r(iErrno, errStr, sizeof(errStr));
if(iErrCode == NO_ERRCODE) {
snprintf(msg, sizeof(msg), "%s: %s", buf, errStr);
} else {
snprintf(msg, sizeof(msg), "%s: %s [try http://www.rsyslog.com/e/%d ]", buf, errStr, iErrCode * -1);
}
} else {
if(iErrCode == NO_ERRCODE) {
snprintf(msg, sizeof(msg), "%s", buf);
} else {
snprintf(msg, sizeof(msg), "%s [try http://www.rsyslog.com/e/%d ]", buf, iErrCode * -1);
}
}
msg[sizeof(msg)/sizeof(char) - 1] = '\0'; /* just to be on the safe side... */
errno = 0;
glblErrLogger(iErrCode, (uchar*)msg);
ENDfunc
}
/* 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;
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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