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|
%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>
#ifdef HAVE_GLOB_H
#include <glob.h>
#endif
#include "parser.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();
}
/**
* parse the file located at filename
*/
int include_file(char *filename)
{
unsigned int p = __parser_y_private.stack_ptr + 1;
FILE *f;
if (p >= MAX_INCLUDE_DEPTH)
{
yyerror("max inclusion depth reached");
return 1;
}
f = fopen(filename, "r");
if (!f)
{
yyerror("can't open include filename");
return 0; /* ignore this error */
}
__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(filename);
yy_switch_to_buffer(yy_create_buffer(f, YY_BUF_SIZE));
return 0;
}
int _parser_y_include (const char *filename)
{
int ret = 0;
#ifdef HAVE_GLOB_H
{
glob_t files;
int i;
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";
}
globfree(&files);
yyerror(err);
return 1;
}
for (i = 0; i < files.gl_pathc; i++)
{
if ((ret = include_file(files.gl_pathv[i])))
{
break;
}
}
globfree(&files);
}
#else /* HAVE_GLOB_H */
/* if glob(3) is not available, try to load pattern directly */
ret = include_file(filename);
#endif /* HAVE_GLOB_H */
return ret;
}
%}
%%
<<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;
}
|
