1%{
2/*	$NetBSD: nsparser.y,v 1.3 1999/01/25 00:16:18 lukem Exp $	*/
3
4/*-
5 * Copyright (c) 1997, 1998, 1999 The NetBSD Foundation, Inc.
6 * All rights reserved.
7 *
8 * This code is derived from software contributed to The NetBSD Foundation
9 * by Luke Mewburn.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 *    notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 *    notice, this list of conditions and the following disclaimer in the
18 *    documentation and/or other materials provided with the distribution.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
23 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30 * POSSIBILITY OF SUCH DAMAGE.
31 */
32
33#include <sys/cdefs.h>
34__FBSDID("$FreeBSD: releng/10.2/lib/libc/net/nsparser.y 251091 2013-05-29 01:54:10Z emaste $");
35
36#include "namespace.h"
37#define _NS_PRIVATE
38#include <nsswitch.h>
39#include <stdio.h>
40#include <stdlib.h>
41#include <string.h>
42#include <syslog.h>
43#include "un-namespace.h"
44
45static	void	_nsaddsrctomap(const char *);
46
47static	ns_dbt		curdbt;
48static	ns_src		cursrc;
49%}
50
51%union {
52	char *str;
53	int   mapval;
54}
55
56%token	NL
57%token	SUCCESS UNAVAIL NOTFOUND TRYAGAIN
58%token	RETURN CONTINUE
59%token  ERRORTOKEN
60%token	<str> STRING
61
62%type	<mapval> Status Action
63
64%%
65
66File
67	:	/* empty */
68	| Lines
69	;
70
71Lines
72	: Entry
73	| Lines Entry
74	;
75
76Entry
77	: NL
78	| Database ':' NL
79		{
80			free((char*)curdbt.name);
81		}
82	| Database ':' Srclist NL
83		{
84			_nsdbtput(&curdbt);
85		}
86	| error NL
87		{
88			yyerrok;
89		}
90	;
91
92Database
93	: STRING
94		{
95			curdbt.name = yylval.str;
96			curdbt.srclist = NULL;
97			curdbt.srclistsize = 0;
98		}
99	;
100
101Srclist
102	: Item
103	| Srclist Item
104	;
105
106Item
107	: STRING
108		{
109			cursrc.flags = NS_TERMINATE;
110			_nsaddsrctomap($1);
111		}
112	| STRING '[' { cursrc.flags = NS_SUCCESS; } Criteria ']'
113		{
114			_nsaddsrctomap($1);
115		}
116	;
117
118Criteria
119	: Criterion
120	| Criteria Criterion
121	;
122
123Criterion
124	: Status '=' Action
125		{
126			if ($3)	     /* if action == RETURN set RETURN bit */
127				cursrc.flags |= $1;
128			else	     /* else unset it */
129				cursrc.flags &= ~$1;
130		}
131	;
132
133Status
134	: SUCCESS	{ $$ = NS_SUCCESS; }
135	| UNAVAIL	{ $$ = NS_UNAVAIL; }
136	| NOTFOUND	{ $$ = NS_NOTFOUND; }
137	| TRYAGAIN	{ $$ = NS_TRYAGAIN; }
138	;
139
140Action
141	: RETURN	{ $$ = NS_ACTION_RETURN; }
142	| CONTINUE	{ $$ = NS_ACTION_CONTINUE; }
143	;
144
145%%
146
147static void
148_nsaddsrctomap(elem)
149	const char *elem;
150{
151	int		i, lineno;
152	extern int	_nsyylineno;
153	extern char *	_nsyytext;
154
155	lineno = _nsyylineno - (*_nsyytext == '\n' ? 1 : 0);
156	if (curdbt.srclistsize > 0) {
157		if (((strcasecmp(elem, NSSRC_COMPAT) == 0) &&
158		    (strcasecmp(curdbt.srclist[0].name, NSSRC_CACHE) != 0)) ||
159		    (strcasecmp(curdbt.srclist[0].name, NSSRC_COMPAT) == 0)) {
160			syslog(LOG_ERR,
161	    "NSSWITCH(nsparser): %s line %d: 'compat' used with sources, other than 'cache'",
162			    _PATH_NS_CONF, lineno);
163			free((void*)elem);
164			return;
165		}
166	}
167	for (i = 0; i < curdbt.srclistsize; i++) {
168		if (strcasecmp(curdbt.srclist[i].name, elem) == 0) {
169			syslog(LOG_ERR,
170		       "NSSWITCH(nsparser): %s line %d: duplicate source '%s'",
171			    _PATH_NS_CONF, lineno, elem);
172			free((void*)elem);
173			return;
174		}
175	}
176	cursrc.name = elem;
177	_nsdbtaddsrc(&curdbt, &cursrc);
178}
179