163 lines
4.2 KiB
Plaintext
163 lines
4.2 KiB
Plaintext
/* $NetBSD: lex.l,v 1.12 2003/11/18 05:28:05 provos Exp $ */
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/* $OpenBSD: lex.l,v 1.9 2002/08/04 04:15:50 provos Exp $ */
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/*
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* Copyright 2002 Niels Provos <provos@citi.umich.edu>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Niels Provos.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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%x quote
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%{
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#include <sys/cdefs.h>
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__RCSID("$NetBSD: lex.l,v 1.12 2003/11/18 05:28:05 provos Exp $");
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#include <sys/types.h>
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#include <sys/tree.h>
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#include <sys/time.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <err.h>
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#include <stdarg.h>
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#include <string.h>
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#include "intercept.h"
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#include "systrace.h"
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#ifdef __NetBSD__
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#include "parse.h"
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#else
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#include "y.tab.h"
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#endif
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extern int yyerror(const char *fmt, ...);
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int yylex(void);
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char *mystring;
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int myoff;
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char quotestr[8192];
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int quoteescape;
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#define YY_INPUT(buf,result,max_size) \
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{ \
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int len = strlen(mystring + myoff); \
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if (max_size < len) \
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len = max_size; \
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if (len == 0) \
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result = YY_NULL; \
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else { \
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memcpy(buf, mystring + myoff, len); \
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myoff += len; \
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result = len; \
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} \
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}
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%}
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%%
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ask { return ASK; }
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deny { return DENY; }
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permit { return PERMIT; }
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and { return AND; }
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or { return OR; }
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not { return NOT; }
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match { return MATCH; }
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then { return THEN; }
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eq { return EQ; }
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neq { return NEQ; }
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sub { return SUB; }
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nsub { return NSUB; }
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inpath { return INPATH; }
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re { return RE; }
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log { return LOG; }
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true { return TRUE; }
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"->" { return THEN; }
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\( { return LBRACE; }
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\) { return RBRACE; }
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if { return IF; }
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user { return USER; }
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group { return GROUP; }
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as { return AS; }
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":" { return COLON; }
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"," { return COMMA; }
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"=" { return EQUAL; }
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"!=" { return NEQUAL; }
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"<" { return LESSER; }
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">" { return GREATER; }
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[\_\$A-Za-z][\.\(\)\/A-Za-z_\-0-9]* { yylval.string = strdup(yytext); return STRING; }
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[0-9]+ { yylval.number = atoi(yytext); return NUMBER; }
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\" { BEGIN(quote);
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*quotestr = '\0';
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quoteescape = 0;
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}
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<quote>[^\\\"]+ {
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if (quoteescape) {
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switch (yytext[0]) {
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case 'n':
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yytext[0] = '\n';
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break;
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case 'r':
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yytext[0] = '\r';
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break;
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default:
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break;
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}
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}
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strlcat(quotestr, yytext, sizeof(quotestr));
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quoteescape = 0;
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}
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<quote>\\ {
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if (!quoteescape)
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quoteescape = 1;
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else {
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strlcat(quotestr, "\\", sizeof(quotestr));
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quoteescape = 0;
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}
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}
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<quote>\" {
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if (!quoteescape) {
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BEGIN(INITIAL);
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yylval.string = strdup(quotestr);
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return CMDSTRING;
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} else {
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strlcat(quotestr, "\"", sizeof(quotestr));
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quoteescape = 0;
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}
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}
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\[ { return LSQBRACE; }
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\] { return RSQBRACE; }
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\ { ; }
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\n { ; }
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\t { ; }
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"#".*\n { ; }
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. { yyerror("illegal token"); }
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%%
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#ifndef yywrap
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int yywrap() { return 1; }
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#endif
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