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
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
|
/* Lex file for rsyslog config format v2 (RainerScript).
* Please note: this file introduces the new config format, but maintains
* backward compatibility. In order to do so, the grammar is not 100% clean,
* but IMHO still sufficiently easy both to understand for programmers
* maitaining the code as well as users writing the config file. Users are,
* of course, encouraged to use new constructs only. But it needs to be noted
* that some of the legacy constructs (specifically the in-front-of-action
* PRI filter) are very hard to beat in ease of use, at least for simpler
* cases. So while we hope that cfsysline support can be dropped some time in
* the future, we will probably keep these useful constructs.
*
* Copyright 2011-2014 Rainer Gerhards and 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.
*/
%top{
#ifndef __clang_analyzer__ /* this is not really our code */
#include "config.h"
}
%{
#include <libestr.h>
#include <ctype.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <fcntl.h>
#include "rsyslog.h"
#include "srUtils.h"
#include "parserif.h"
PRAGMA_IGNORE_Wsign_compare
PRAGMA_IGNORE_Wmissing_noreturn
FILE *fp_rs_full_conf_output = NULL;
/* TODO: move this to a better modules, refactor -- rgerhards, 2018-01-22 */
static char *
read_file(const char *const filename)
{
char *content = NULL;
int fd = -1;
struct stat sb;
ssize_t nread;
assert(filename != NULL);
if((fd = open((const char*) filename, O_RDONLY)) == -1) {
goto done;
}
if(fstat(fd, &sb) == -1) {
goto done;
}
content = malloc(sb.st_size+1);
if(content == NULL) {
goto done;
}
nread = read(fd, content, sb.st_size);
content[nread] = '\0';
if(nread != (ssize_t) sb.st_size) {
free(content);
content = NULL;
goto done;
}
done:
if(fd != -1) {
close(fd);
}
return content;
}
static es_str_t* ATTR_NONNULL(1)
expand_backticks_echo(const char *param)
{
assert(param != NULL);
assert(strncmp(param, "echo ", sizeof("echo ")-1) == 0);
char envvar[512];
int i_envvar = 0;
int in_env = 0;
es_str_t *estr;
param += sizeof("echo ")-1;
if((estr = es_newStr(strlen(param))) == NULL) {
goto done;
}
while(*param) {
if(in_env) {
if(isspace(*param) || *param == '/') {
envvar[i_envvar] = '\0';
const char *envval = getenv(envvar);
if(envval != NULL)
es_addBuf(&estr, envval, strlen(envval));
es_addChar(&estr, *param); /* curr char part of output! */
i_envvar = 0;
in_env = 0;
} else if(i_envvar > sizeof(envvar) - 1) {
parser_errmsg("environment variable too long, begins with %s", envvar);
goto done;
} else {
envvar[i_envvar++] = *param;
}
} else if (*param == '$') {
in_env = 1;
} else {
es_addChar(&estr, *param);
}
++param;
}
/* final check, we may be in env var name (very probable!) */
if(in_env) {
envvar[i_envvar] = '\0';
const char *envval = getenv(envvar);
if(envval != NULL)
es_addBuf(&estr, envval, strlen(envval));
}
done: return estr;
}
static es_str_t* ATTR_NONNULL(1)
expand_backticks(char *const param)
{
es_str_t *estr;
assert(param != NULL);
if(strncmp(param, "echo ", sizeof("echo ")-1) == 0) {
estr = expand_backticks_echo(param);
} else if(strncmp(param, "cat ", sizeof("cat ")-1) == 0) {
const char *val = read_file(param+4);
if(val == NULL) {
parser_errmsg("file could not be accessed for `%s`", param);
const char *errmsg = "/* file cound not be accessed - see"
"error messages */";
estr = es_newStrFromCStr(errmsg, strlen(errmsg));
} else {
estr = es_newStrFromCStr(val, strlen(val));
}
free((void*) val);
} else {
parser_errmsg("invalid backtick parameter `%s` - replaced by "
"empty string (\"\")", param);
estr = es_newStr(1);
}
return estr;
}
%}
%option noyywrap nodefault case-insensitive yylineno
/*%option noyywrap nodefault case-insensitive */
/* avoid compiler warning: `yyunput' defined but not used */
%option nounput noinput
%x INOBJ
/* INOBJ is selected if we are inside an object (name/value pairs!) */
%x COMMENT
/* COMMENT is "the usual trick" to handle C-style comments */
%x INCL
/* INCL is in $IncludeConfig processing (skip to include file) */
%x LINENO
/* LINENO: support for setting the linenumber */
%x INCALL
/* INCALL: support for the call statement */
%x IN_PROCEDURE_CALL
/* IN_PROCEDURE_CALL: support for the call statement */
%x EXPR
/* EXPR is a bit ugly, but we need it to support pre v6-syntax. The problem
* is that cfsysline statement start with $..., the same like variables in
* an expression. However, cfsysline statements can never appear inside an
* expression. So we create a specific expr mode, which is turned on after
* we lexed a keyword that needs to be followed by an expression (using
* knowledge from the upper layer...). In expr mode, we strictly do
* expression-based parsing. Expr mode is stopped when we reach a token
* that can not be part of an expression (currently only "then"). As I
* wrote this ugly, but the price needed to pay in order to remain
* compatible to the previous format.
*/
%{
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include <libestr.h>
#include "rainerscript.h"
#include "parserif.h"
#include "grammar.h"
static int preCommentState; /* save for lex state before a comment */
struct bufstack {
struct bufstack *prev;
YY_BUFFER_STATE bs;
int lineno;
char *fn;
es_str_t *estr;
} *currbs = NULL;
char *cnfcurrfn; /* name of currently processed file */
int popfile(void);
int cnfSetLexFile(const char *fname);
static void cnfPrintToken(const char *token);
extern int yydebug;
/* somehow, I need these prototype even though the headers are
* included. I guess that's some autotools magic I don't understand...
*/
#if !defined(__FreeBSD__) && !defined(__NetBSD__) && !defined(__OpenBSD__) \
&& !defined(__DragonflyBSD__) && !defined(_AIX)
int fileno(FILE *stream);
#endif
%}
%%
/* keywords */
"if" { cnfPrintToken(yytext); BEGIN EXPR; return IF; }
"foreach" { cnfPrintToken(yytext); BEGIN EXPR; return FOREACH; }
"reload_lookup_table" { cnfPrintToken(yytext); BEGIN IN_PROCEDURE_CALL; return RELOAD_LOOKUP_TABLE_PROCEDURE; }
<IN_PROCEDURE_CALL>"(" { cnfPrintToken(yytext); return yytext[0]; }
<IN_PROCEDURE_CALL>\'([^'\\]|\\['"\\$bntr]|\\x[0-9a-f][0-9a-f]|\\[0-7][0-7][0-7])*\' {
cnfPrintToken(yytext); yytext[yyleng-1] = '\0';
unescapeStr((uchar*)yytext+1, yyleng-2);
yylval.estr = es_newStrFromBuf(yytext+1, strlen(yytext)-1);
return STRING; }
<IN_PROCEDURE_CALL>\"([^"\\$]|\\["'\\$bntr]|\\x[0-9a-f][0-9a-f]|\\[0-7][0-7][0-7])*\" {
cnfPrintToken(yytext); yytext[yyleng-1] = '\0';
unescapeStr((uchar*)yytext+1, yyleng-2);
yylval.estr = es_newStrFromBuf(yytext+1, strlen(yytext)-1);
return STRING; }
<IN_PROCEDURE_CALL>"," { cnfPrintToken(yytext); return yytext[0]; }
<IN_PROCEDURE_CALL>")" { cnfPrintToken(yytext); BEGIN INITIAL; return yytext[0]; }
<IN_PROCEDURE_CALL>[ \t\n]* {cnfPrintToken(yytext); }
<IN_PROCEDURE_CALL>. { cnfPrintToken(yytext); parser_errmsg("invalid character '%s' in expression "
"- is there an invalid escape sequence somewhere?",
yytext); }
<EXPR>"(" { cnfPrintToken(yytext); BEGIN EXPR; return yytext[0]; }
<EXPR>"then" { cnfPrintToken(yytext); BEGIN INITIAL; return THEN; }
<EXPR>"do" { cnfPrintToken(yytext); BEGIN INITIAL; return DO; }
<EXPR>";" { cnfPrintToken(yytext); BEGIN INITIAL; return ';'; }
<EXPR>"or" { cnfPrintToken(yytext); return OR; }
<EXPR>"and" { cnfPrintToken(yytext); return AND; }
<EXPR>"not" { cnfPrintToken(yytext); return NOT; }
<EXPR>"=" |
<EXPR>"," |
<EXPR>"*" |
<EXPR>"/" |
<EXPR>"%" |
<EXPR>"+" |
<EXPR>"&" |
<EXPR>"-" |
<EXPR>"[" |
<EXPR>"]" |
<EXPR>")" { cnfPrintToken(yytext); return yytext[0]; }
<EXPR>"==" { cnfPrintToken(yytext); return CMP_EQ; }
<EXPR>"<=" { cnfPrintToken(yytext); return CMP_LE; }
<EXPR>">=" { cnfPrintToken(yytext); return CMP_GE; }
<EXPR>"!=" |
<EXPR>"<>" { cnfPrintToken(yytext); return CMP_NE; }
<EXPR>"<" { cnfPrintToken(yytext); return CMP_LT; }
<EXPR>">" { cnfPrintToken(yytext); return CMP_GT; }
<EXPR>"contains" { cnfPrintToken(yytext); return CMP_CONTAINS; }
<EXPR>"in" { cnfPrintToken(yytext); return ITERATOR_ASSIGNMENT; }
<EXPR>"contains_i" { cnfPrintToken(yytext); return CMP_CONTAINSI; }
<EXPR>"startswith" { cnfPrintToken(yytext); return CMP_STARTSWITH; }
<EXPR>"startswith_i" { cnfPrintToken(yytext); return CMP_STARTSWITHI; }
<EXPR>0[0-7]+ | /* octal number */
<EXPR>0x[0-9a-f]+ | /* hex number, following rule is dec; strtoll handles all! */
<EXPR>([1-9][0-9]*|0) { cnfPrintToken(yytext); yylval.n = strtoll(yytext, NULL, 0); return NUMBER; }
<EXPR>\$[$!./]{0,1}[@a-z_]*[!@a-z0-9\-_\.\[\]]* { cnfPrintToken(yytext); yylval.s = strdup(yytext+1); return VAR; }
<EXPR>\'([^'\\]|\\['"\\$bntr]|\\x[0-9a-f][0-9a-f]|\\[0-7][0-7][0-7])*\' {
cnfPrintToken(yytext); yytext[yyleng-1] = '\0';
unescapeStr((uchar*)yytext+1, yyleng-2);
yylval.estr = es_newStrFromBuf(yytext+1, strlen(yytext)-1);
return STRING; }
<EXPR>`([^`\\]|\\['`"\\bntr]|\\x[0-9a-f][0-9a-f]|\\[0-7][0-7][0-7])*` {
cnfPrintToken(yytext); yytext[yyleng-1] = '\0';
unescapeStr((uchar*)yytext+1, yyleng-2);
yylval.estr = expand_backticks(yytext+1);
return STRING; }
<EXPR>\"([^"\\$]|\\["'\\$bntr]|\\x[0-9a-f][0-9a-f]|\\[0-7][0-7][0-7])*\" {
cnfPrintToken(yytext); yytext[yyleng-1] = '\0';
unescapeStr((uchar*)yytext+1, yyleng-2);
yylval.estr = es_newStrFromBuf(yytext+1, strlen(yytext)-1);
return STRING; }
<EXPR>\"([^"\\]|\\["'\\$bntr]|\\x[0-9a-f][0-9a-f]|\\[0-7][0-7][0-7])*\" {
cnfPrintToken(yytext); parser_errmsg("$-sign in double quotes must be "
"escaped, problem string is: %s",
yytext); }
<EXPR>[ \t\n] { cnfPrintToken(yytext); }
<EXPR>"exists" { cnfPrintToken(yytext); return EXISTS; } /* special case function (see rainerscript.c) */
<EXPR>[a-z][a-z0-9_]* { cnfPrintToken(yytext); yylval.estr = es_newStrFromCStr(yytext, yyleng);
return FUNC; }
<EXPR>. { cnfPrintToken(yytext); parser_errmsg("invalid character '%s' in expression "
"- is there an invalid escape sequence somewhere?",
yytext); }
<INCALL>[ \t\n] { cnfPrintToken(yytext); }
<INCALL>. { cnfPrintToken(yytext); parser_errmsg("invalid character '%s' in 'call' statement"
"- is there an invalid escape sequence somewhere?",
yytext); }
<INCALL>[a-zA-Z][a-zA-Z0-9\-_\.]* { cnfPrintToken(yytext); yylval.estr = es_newStrFromCStr(yytext, yyleng);
BEGIN INITIAL;
return NAME; }
"&" { cnfPrintToken(yytext); return '&'; }
"{" { cnfPrintToken(yytext); return '{'; }
"}" { cnfPrintToken(yytext); return '}'; }
"stop" { cnfPrintToken(yytext); return STOP; }
"else" { cnfPrintToken(yytext); return ELSE; }
"call" { cnfPrintToken(yytext); BEGIN INCALL; return CALL; }
"call_indirect" { cnfPrintToken(yytext); BEGIN EXPR; return CALL_INDIRECT; }
"set" { cnfPrintToken(yytext); BEGIN EXPR; return SET; }
"reset" { cnfPrintToken(yytext); BEGIN EXPR; return RESET; }
"unset" { cnfPrintToken(yytext); BEGIN EXPR; return UNSET; }
"continue" { cnfPrintToken(yytext); return CONTINUE; }
/* line number support because the "preprocessor" combines lines and so needs
* to tell us the real source line.
*/
"preprocfilelinenumber(" { cnfPrintToken(yytext); BEGIN LINENO; }
<LINENO>[0-9]+ { cnfPrintToken(yytext); yylineno = atoi(yytext) - 1; }
<LINENO>")" { cnfPrintToken(yytext); BEGIN INITIAL; }
<LINENO>.|\n
/* $IncludeConfig must be detected as part of CFSYSLINE, because this is
* always the longest match :-(
*/
<INCL>.|\n
<INCL>[^ \t\n]+ { cnfPrintToken(yytext); if(cnfDoInclude(yytext, 0) != 0)
yyterminate();
BEGIN INITIAL; }
"main_queue"[ \n\t]*"(" { cnfPrintToken(yytext); yylval.objType = CNFOBJ_MAINQ;
BEGIN INOBJ; return BEGINOBJ; }
"timezone"[ \n\t]*"(" { cnfPrintToken(yytext); yylval.objType = CNFOBJ_TIMEZONE;
BEGIN INOBJ; return BEGINOBJ; }
"parser"[ \n\t]*"(" { cnfPrintToken(yytext); yylval.objType = CNFOBJ_PARSER;
BEGIN INOBJ; return BEGINOBJ; }
"global"[ \n\t]*"(" { cnfPrintToken(yytext); yylval.objType = CNFOBJ_GLOBAL;
BEGIN INOBJ; return BEGINOBJ; }
"template"[ \n\t]*"(" { cnfPrintToken(yytext); yylval.objType = CNFOBJ_TPL;
BEGIN INOBJ; return BEGIN_TPL; }
"ruleset"[ \n\t]*"(" { cnfPrintToken(yytext); yylval.objType = CNFOBJ_RULESET;
BEGIN INOBJ; return BEGIN_RULESET; }
"property"[ \n\t]*"(" { cnfPrintToken(yytext); yylval.objType = CNFOBJ_PROPERTY;
BEGIN INOBJ; return BEGIN_PROPERTY; }
"constant"[ \n\t]*"(" { cnfPrintToken(yytext); yylval.objType = CNFOBJ_CONSTANT;
BEGIN INOBJ; return BEGIN_CONSTANT; }
"input"[ \n\t]*"(" { cnfPrintToken(yytext); yylval.objType = CNFOBJ_INPUT;
BEGIN INOBJ; return BEGINOBJ; }
"module"[ \n\t]*"(" { cnfPrintToken(yytext); yylval.objType = CNFOBJ_MODULE;
BEGIN INOBJ; return BEGINOBJ; }
"lookup_table"[ \n\t]*"(" { cnfPrintToken(yytext); yylval.objType = CNFOBJ_LOOKUP_TABLE;
BEGIN INOBJ; return BEGINOBJ; }
"dyn_stats"[ \n\t]*"(" { cnfPrintToken(yytext); yylval.objType = CNFOBJ_DYN_STATS;
BEGIN INOBJ; return BEGINOBJ; }
"percentile_stats"[ \n\t]*"(" { cnfPrintToken(yytext); yylval.objType = CNFOBJ_PERCTILE_STATS;
BEGIN INOBJ; return BEGINOBJ; }
"include"[ \n\t]*"(" { cnfPrintToken(yytext); BEGIN INOBJ; return BEGIN_INCLUDE; }
"action"[ \n\t]*"(" { cnfPrintToken(yytext); BEGIN INOBJ; return BEGIN_ACTION; }
^[ \t]*:\$?[a-z\-]+[ ]*,[ ]*!?[a-z]+[ ]*,[ ]*\"(\\\"|[^\"])*\" {
cnfPrintToken(yytext); yylval.s = strdup(rmLeadingSpace(yytext));
dbgprintf("lexer: propfilt is '%s'\n", yylval.s);
return PROPFILT;
}
^[ \t]*[\*a-z][\*a-z]*[0-7]*[\.,][,!=;\.\*a-z0-7]+ { cnfPrintToken(yytext); yylval.s = strdup(rmLeadingSpace(yytext)); return PRIFILT; }
"~" |
"*" |
\-\/[^*][^\n]* |
\/[^*][^\n]* |
:[a-z0-9]+:[^\n]* |
[\|\.\-\@\^?~>][^\n]+ |
[a-z0-9_][a-z0-9_\-\+,;]* { cnfPrintToken(yytext); yylval.s = yytext; return LEGACY_ACTION; }
<INOBJ>")" { cnfPrintToken(yytext); BEGIN INITIAL; return ENDOBJ; }
<INOBJ>[a-z][a-z0-9_\.]* { cnfPrintToken(yytext); yylval.estr = es_newStrFromCStr(yytext, yyleng);
return NAME; }
<INOBJ>"," |
<INOBJ>"[" |
<INOBJ>"]" |
<INOBJ>"=" { cnfPrintToken(yytext); return(yytext[0]); }
<INOBJ>\"([^"\\]|\\['"?\\abfnrtv]|\\[0-7]{1,3})*\" {
cnfPrintToken(yytext); yytext[yyleng-1] = '\0';
unescapeStr((uchar*)yytext+1, yyleng-2);
yylval.estr = es_newStrFromBuf(yytext+1, strlen(yytext)-1);
return STRING; }
<INOBJ>`([^`\\]|\\['`?\\abfnrtv]|\\[0-7]{1,3})*` {
cnfPrintToken(yytext); yytext[yyleng-1] = '\0';
unescapeStr((uchar*)yytext+1, yyleng-2);
yylval.estr = expand_backticks(yytext+1);
return STRING; }
/*yylval.estr = es_newStrFromBuf(yytext+1, yyleng-2);
return VALUE; }*/
"/*" { cnfPrintToken(yytext); preCommentState = YY_START; BEGIN COMMENT; }
<INOBJ>"/*" { cnfPrintToken(yytext); preCommentState = YY_START; BEGIN COMMENT; }
<EXPR>"/*" { cnfPrintToken(yytext); preCommentState = YY_START; BEGIN COMMENT; }
<COMMENT>"*/" { cnfPrintToken(yytext); BEGIN preCommentState; }
<COMMENT>([^*]|\n)+|.
<INOBJ>#.*$ /* skip comments in input */
<INOBJ>[ \n\t] { cnfPrintToken(yytext); }
<INOBJ>. { cnfPrintToken(yytext); parser_errmsg("invalid character '%s' in object definition "
"- is there an invalid escape sequence somewhere?",
yytext); }
\$[a-z]+.*$ { cnfPrintToken(yytext); /* see comment on $IncludeConfig above */
if(!strncasecmp(yytext, "$includeconfig ", 14)) {
yyless((yy_size_t)14);
BEGIN INCL;
} else if(!strncasecmp(yytext, "$ruleset ", 9)) {
yylval.s = strdup(yytext);
return LEGACY_RULESET;
} else {
cnfDoCfsysline(strdup(yytext));
}
}
![^ \t\n]+[ \t]*$ { cnfPrintToken(yytext); yylval.s = strdup(yytext); return BSD_TAG_SELECTOR; }
[+-]\*[ \t\n]*#.*$ { cnfPrintToken(yytext); yylval.s = strdup(yytext); return BSD_HOST_SELECTOR; }
[+-]\*[ \t\n]*$ { cnfPrintToken(yytext); yylval.s = strdup(yytext); return BSD_HOST_SELECTOR; }
^[ \t]*[+-][a-z0-9.:-]+[ \t]*$ { cnfPrintToken(yytext); yylval.s = strdup(yytext); return BSD_HOST_SELECTOR; }
\#.*\n {cnfPrintToken(yytext); }/* skip comments in input */
[\n\t ] {cnfPrintToken(yytext); }/* drop whitespace */
. { cnfPrintToken(yytext); parser_errmsg("invalid character '%s' "
"- is there an invalid escape sequence somewhere?",
yytext); }
<<EOF>> { if(popfile() != 0) yyterminate(); }
%%
static void cnfPrintToken(const char *token)
{
if(fp_rs_full_conf_output != NULL) {
fprintf(fp_rs_full_conf_output, "%s", token);
}
}
/* add config file or text the the stack of config objects to be
* processed.
* cnfobjname is either the file name or "text" if generated from
* text ("text" can also be replaced by something more intelligent
* by the caller.
* The provided string is freed.
*/
int ATTR_NONNULL()
cnfAddConfigBuffer(es_str_t *const str, const char *const cnfobj_name)
{
struct bufstack *bs;
int r = 0;
assert(str != NULL);
assert(cnfobj_name != NULL);
if((bs = malloc(sizeof(struct bufstack))) == NULL) {
r = 1;
goto done;
}
if(currbs != NULL)
currbs->lineno = yylineno;
bs->prev = currbs;
bs->fn = strdup(cnfobj_name);
yy_size_t lll = es_strlen(str);
/* NOTE: yy_scan_buffer() does an automatic yy_switch_to_buffer to the new buffer */
bs->bs = yy_scan_buffer((char*)es_getBufAddr(str), lll);
bs->estr = str; /* needed so we can free it later */
currbs = bs;
cnfcurrfn = bs->fn;
yylineno = 1;
dbgprintf("config parser: pushed config fragment on top of stack: %s\n", cnfobj_name);
if(fp_rs_full_conf_output != NULL) {
fprintf(fp_rs_full_conf_output, "\n##### BEGIN CONFIG: %s (put on stack)\n", cnfcurrfn);
}
done:
if(r != 0) {
es_deleteStr(str);
}
return r;
}
/* set a new buffers. Returns 0 on success, 1 on error, 2 on file not exists.
* note: in case of error, errno must be kept valid!
*/
int
cnfSetLexFile(const char *const fname)
{
es_str_t *str = NULL;
struct bufstack *bs;
FILE *fp;
int r = 0;
/* check for invalid recursive include */
for(bs = currbs ; bs != NULL ; bs = bs->prev) {
if(!strcmp(fname, bs->fn)) {
parser_errmsg("trying to include file '%s', "
"which is already included - ignored", fname);
r = 1;
goto done;
}
}
if(fname == NULL) {
fp = stdin;
} else {
if((fp = fopen(fname, "r")) == NULL) {
r = 2;
goto done;
}
}
readConfFile(fp, &str);
if(fp != stdin)
fclose(fp);
r = cnfAddConfigBuffer(str, ((fname == NULL) ? "stdin" : fname));
done:
return r;
}
/* returns 0 on success, something else otherwise */
int
popfile(void)
{
struct bufstack *bs = currbs;
if(fp_rs_full_conf_output != NULL) {
fprintf(fp_rs_full_conf_output, "\n##### END CONFIG: %s\n", cnfcurrfn);
}
if(bs == NULL)
return 1;
/* delete current entry. But we must not free the file name if
* this is the top-level file, because then it may still be used
* in error messages for other processing steps.
* TODO: change this to another method which stores the file
* name inside the config objects. In the longer term, this is
* necessary, as otherwise we may provide wrong file name information
* at the end of include files as well. -- rgerhards, 2011-07-22
*/
dbgprintf("config parser: reached end of file %s\n", bs->fn);
yy_delete_buffer(bs->bs);
if(bs->prev != NULL)
free(bs->fn);
free(bs->estr);
/* switch back to previous */
currbs = bs->prev;
free(bs);
if(currbs == NULL) {
dbgprintf("config parser: parsing completed\n");
return 1; /* all processed */
}
yy_switch_to_buffer(currbs->bs);
yylineno = currbs->lineno;
cnfcurrfn = currbs->fn;
dbgprintf("config parser: resume parsing of file %s at line %d\n",
cnfcurrfn, yylineno);
return 0;
}
void
tellLexEndParsing(void)
{
free(cnfcurrfn);
cnfcurrfn= NULL;
}
#endif // #ifndef __clang_analyzer__
|