summaryrefslogtreecommitdiffstats
path: root/plugins/omstdout/omstdout.c
blob: f8564a01c4bdbe242ab926ebc0830fb81cfd7026 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
/* omstdout.c
 * send all output to stdout - this is primarily a test driver (but may
 * be used for weired use cases). Not tested for robustness!
 *
 * NOTE: read comments in module-template.h for more specifics!
 *
 * File begun on 2009-03-19 by RGerhards
 *
 * Copyright 2009-2012 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 <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include <signal.h>
#include <errno.h>
#include <unistd.h>
#include "conf.h"
#include "syslogd-types.h"
#include "srUtils.h"
#include "template.h"
#include "module-template.h"
#include "errmsg.h"
#include "cfsysline.h"

MODULE_TYPE_OUTPUT
MODULE_TYPE_NOKEEP
MODULE_CNFNAME("omstdout")

static rsRetVal resetConfigVariables(uchar __attribute__((unused)) *pp, void __attribute__((unused)) *pVal);

/* internal structures
 */
DEF_OMOD_STATIC_DATA

/* config variables */


typedef struct _instanceData {
	int bUseArrayInterface;		/* uses action use array instead of string template interface? */
	int bEnsureLFEnding;		/* ensure that a linefeed is written at the end of EACH record (test aid for nettester) */
} instanceData;

typedef struct configSettings_s {
	int bUseArrayInterface;		/* shall action use array instead of string template interface? */
	int bEnsureLFEnding;		/* shall action use array instead of string template interface? */
} configSettings_t;

SCOPING_SUPPORT; /* must be set AFTER configSettings_t is defined */

BEGINinitConfVars		/* (re)set config variables to default values */
CODESTARTinitConfVars 
	resetConfigVariables(NULL, NULL);
ENDinitConfVars

BEGINcreateInstance
CODESTARTcreateInstance
ENDcreateInstance


BEGINisCompatibleWithFeature
CODESTARTisCompatibleWithFeature
	if(eFeat == sFEATURERepeatedMsgReduction)
		iRet = RS_RET_OK;
ENDisCompatibleWithFeature


BEGINfreeInstance
CODESTARTfreeInstance
ENDfreeInstance


BEGINdbgPrintInstInfo
CODESTARTdbgPrintInstInfo
ENDdbgPrintInstInfo


BEGINtryResume
CODESTARTtryResume
ENDtryResume

BEGINdoAction
	char **szParams;
	char *toWrite;
	int iParamVal;
	int iParam;
	int iBuf;
	char szBuf[65564];
	size_t len;
CODESTARTdoAction
	if(pData->bUseArrayInterface) {
		/* if we use array passing, we need to put together a string
		 * ourselves. At this point, please keep in mind that omstdout is
		 * primarily a testing aid. Other modules may do different processing
		 * if they would like to support downlevel versions which do not support
		 * array-passing, but also use that interface on cores who do...
		 * So this code here is also more or less an example of how to do that.
		 * rgerhards, 2009-04-03
		 */
		szParams = (char**)(void*) (ppString[0]);
		/* In array-passing mode, ppString[] contains a NULL-terminated array
		 * of char *pointers.
		 */
		iParam = 0;
		iBuf = 0;
		while(szParams[iParam] != NULL) {
			if(iParam > 0)
				szBuf[iBuf++] = ','; /* all but first need a delimiter */
			iParamVal = 0;
			while(szParams[iParam][iParamVal] != '\0' && iBuf < (int) sizeof(szBuf)) {
				szBuf[iBuf++] = szParams[iParam][iParamVal++];
			}
			++iParam;
		}
		szBuf[iBuf] = '\0';
		toWrite = szBuf;
	} else {
		toWrite = (char*) ppString[0];
	}
	len = strlen(toWrite);
	write(1, toWrite, len); /* 1 is stdout! */
	if(pData->bEnsureLFEnding && toWrite[len-1] != '\n') {
		write(1, "\n", 1); /* write missing LF */
	}
ENDdoAction


BEGINparseSelectorAct
	int iTplOpts;
CODESTARTparseSelectorAct
CODE_STD_STRING_REQUESTparseSelectorAct(1)
	/* first check if this config line is actually for us */
	if(strncmp((char*) p, ":omstdout:", sizeof(":omstdout:") - 1)) {
		ABORT_FINALIZE(RS_RET_CONFLINE_UNPROCESSED);
	}

	/* ok, if we reach this point, we have something for us */
	p += sizeof(":omstdout:") - 1; /* eat indicator sequence  (-1 because of '\0'!) */
	CHKiRet(createInstance(&pData));

	/* check if a non-standard template is to be applied */
	if(*(p-1) == ';')
		--p;
	iTplOpts = (cs.bUseArrayInterface == 0) ? 0 : OMSR_TPL_AS_ARRAY;
	CHKiRet(cflineParseTemplateName(&p, *ppOMSR, 0, iTplOpts, (uchar*) "RSYSLOG_FileFormat"));
	pData->bUseArrayInterface = cs.bUseArrayInterface;
	pData->bEnsureLFEnding = cs.bEnsureLFEnding;
CODE_STD_FINALIZERparseSelectorAct
ENDparseSelectorAct


BEGINmodExit
CODESTARTmodExit
ENDmodExit


BEGINqueryEtryPt
CODESTARTqueryEtryPt
CODEqueryEtryPt_STD_OMOD_QUERIES
ENDqueryEtryPt



/* Reset config variables for this module to default values.
 */
static rsRetVal resetConfigVariables(uchar __attribute__((unused)) *pp, void __attribute__((unused)) *pVal)
{
	DEFiRet;
	cs.bUseArrayInterface = 0;
	cs.bEnsureLFEnding = 1;
	RETiRet;
}


BEGINmodInit()
	rsRetVal localRet;
	rsRetVal (*pomsrGetSupportedTplOpts)(unsigned long *pOpts);
	unsigned long opts;
	int bArrayPassingSupported;		/* does core support template passing as an array? */
CODESTARTmodInit
SCOPINGmodInit
	*ipIFVersProvided = CURR_MOD_IF_VERSION; /* we only support the current interface specification */
CODEmodInit_QueryRegCFSLineHdlr
	/* check if the rsyslog core supports parameter passing code */
	bArrayPassingSupported = 0;
	localRet = pHostQueryEtryPt((uchar*)"OMSRgetSupportedTplOpts", &pomsrGetSupportedTplOpts);
	if(localRet == RS_RET_OK) {
		/* found entry point, so let's see if core supports array passing */
		CHKiRet((*pomsrGetSupportedTplOpts)(&opts));
		if(opts & OMSR_TPL_AS_ARRAY)
			bArrayPassingSupported = 1;
	} else if(localRet != RS_RET_ENTRY_POINT_NOT_FOUND) {
		ABORT_FINALIZE(localRet); /* Something else went wrong, what is not acceptable */
	}
	DBGPRINTF("omstdout: array-passing is %ssupported by rsyslog core.\n", bArrayPassingSupported ? "" : "not ");

	if(bArrayPassingSupported) {
		/* enable config comand only if core supports it */
		CHKiRet(omsdRegCFSLineHdlr((uchar *)"actionomstdoutarrayinterface", 0, eCmdHdlrBinary, NULL,
			                   &cs.bUseArrayInterface, STD_LOADABLE_MODULE_ID));
	}
	CHKiRet(omsdRegCFSLineHdlr((uchar *)"actionomstdoutensurelfending", 0, eCmdHdlrBinary, NULL,
				   &cs.bEnsureLFEnding, STD_LOADABLE_MODULE_ID));
	CHKiRet(omsdRegCFSLineHdlr((uchar *)"resetconfigvariables", 1, eCmdHdlrCustomHandler,
				    resetConfigVariables, NULL, STD_LOADABLE_MODULE_ID));
ENDmodInit

/* vi:set ai:
 */