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
|
%option noinput
%option nounput
%{
/* FreeS/WAN config file parser (parser.l)
* Copyright (C) 2001 Mathieu Lafon - Arkoon Network Security
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* This program 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 General Public License
* for more details.
*/
#include <string.h>
#include <stdlib.h>
#include <glob.h>
#include "y.tab.h"
#define MAX_INCLUDE_DEPTH 20
extern void yyerror(const char *);
extern int yylex(void);
extern int yylex_destroy(void);
static struct {
int stack_ptr;
YY_BUFFER_STATE stack[MAX_INCLUDE_DEPTH];
FILE *file[MAX_INCLUDE_DEPTH];
unsigned int line[MAX_INCLUDE_DEPTH];
char *filename[MAX_INCLUDE_DEPTH];
} __parser_y_private;
void _parser_y_error(char *b, int size, const char *s);
void _parser_y_init (const char *f);
void _parser_y_fini (void);
int _parser_y_include (const char *filename);
void _parser_y_error(char *b, int size, const char *s)
{
extern char *yytext; // was: char yytext[];
snprintf(b, size, "%s:%d: %s [%s]",
__parser_y_private.filename[__parser_y_private.stack_ptr],
__parser_y_private.line[__parser_y_private.stack_ptr],
s, yytext);
}
void _parser_y_init (const char *f)
{
memset(&__parser_y_private, 0, sizeof(__parser_y_private));
__parser_y_private.line[0] = 1;
__parser_y_private.filename[0] = strdup(f);
}
void _parser_y_fini (void)
{
unsigned int i;
for (i = 0; i < MAX_INCLUDE_DEPTH; i++)
{
if (__parser_y_private.filename[i])
free(__parser_y_private.filename[i]);
if (__parser_y_private.file[i])
fclose(__parser_y_private.file[i]);
}
memset(&__parser_y_private, 0, sizeof(__parser_y_private));
yylex_destroy();
}
int _parser_y_include (const char *filename)
{
glob_t files;
int i, ret;
ret = glob(filename, GLOB_ERR, NULL, &files);
if (ret)
{
const char *err;
switch (ret)
{
case GLOB_NOSPACE:
err = "include files ran out of memory";
break;
case GLOB_ABORTED:
err = "include files aborted due to read error";
break;
case GLOB_NOMATCH:
err = "include files found no matches";
break;
default:
err = "unknown include files error";
}
yyerror(err);
return 1;
}
for (i = 0; i < files.gl_pathc; i++)
{
FILE *f;
unsigned int p = __parser_y_private.stack_ptr + 1;
if (p >= MAX_INCLUDE_DEPTH)
{
yyerror("max inclusion depth reached");
return 1;
}
f = fopen(files.gl_pathv[i], "r");
if (!f)
{
yyerror("can't open include filename");
continue;
}
__parser_y_private.stack_ptr++;
__parser_y_private.file[p] = f;
__parser_y_private.stack[p] = YY_CURRENT_BUFFER;
__parser_y_private.line[p] = 1;
__parser_y_private.filename[p] = strdup(files.gl_pathv[i]);
yy_switch_to_buffer(yy_create_buffer(f, YY_BUF_SIZE));
}
globfree(&files);
return 0;
}
%}
%%
<<EOF>> {
if (__parser_y_private.filename[__parser_y_private.stack_ptr]) {
free(__parser_y_private.filename[__parser_y_private.stack_ptr]);
__parser_y_private.filename[__parser_y_private.stack_ptr] = NULL;
}
if (__parser_y_private.file[__parser_y_private.stack_ptr]) {
fclose(__parser_y_private.file[__parser_y_private.stack_ptr]);
__parser_y_private.file[__parser_y_private.stack_ptr] = NULL;
yy_delete_buffer (YY_CURRENT_BUFFER);
yy_switch_to_buffer
(__parser_y_private.stack[__parser_y_private.stack_ptr]);
}
if (--__parser_y_private.stack_ptr < 0) {
yyterminate();
}
}
^[\t ]+ return FIRST_SPACES;
[\t ]+ /* ignore spaces in line */ ;
= return EQUAL;
\n|#.*\n {
__parser_y_private.line[__parser_y_private.stack_ptr]++;
return EOL;
}
config return CONFIG;
setup return SETUP;
conn return CONN;
ca return CA;
include return INCLUDE;
version return FILE_VERSION;
[^\"= \t\n]+ {
yylval.s = strdup(yytext);
return STRING;
}
\"[^\"\n]*\" {
yylval.s = strdup(yytext+1);
if (yylval.s) yylval.s[strlen(yylval.s)-1]='\0';
return STRING;
}
. yyerror(yytext);
%%
int yywrap(void)
{
return 1;
}
|
