nsparser.y revision 1.2 
1%{
2/*	$NetBSD: nsparser.y,v 1.2 1999/01/15 12:53:25 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 * 3. All advertising materials mentioning features or use of this software
20 *    must display the following acknowledgement:
21 *        This product includes software developed by the NetBSD
22 *        Foundation, Inc. and its contributors.
23 * 4. Neither the name of The NetBSD Foundation nor the names of its
24 *    contributors may be used to endorse or promote products derived
25 *    from this software without specific prior written permission.
26 *
27 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
28 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
29 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
30 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
31 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
37 * POSSIBILITY OF SUCH DAMAGE.
38 */
39
40#define _NS_PRIVATE
41#include <err.h>
42#include <nsswitch.h>
43#include <stdio.h>
44#include <string.h>
45
46
47static	void	_nsaddsrctomap __P((const char *));
48
49static	ns_dbt		curdbt;
50static	ns_src		cursrc;
51%}
52
53%union {
54	char *str;
55	int   mapval;
56}
57
58%token	NL
59%token	SUCCESS UNAVAIL NOTFOUND TRYAGAIN
60%token	RETURN CONTINUE
61%token	<str> STRING
62
63%type	<mapval> Status Action
64
65%%
66
67File
68	:	/* empty */
69	| Lines
70	;
71
72Lines
73	: Entry
74	| Lines Entry
75	;
76
77Entry
78	: NL
79	| Database ':' NL
80	| Database ':' Srclist NL
81		{
82			_nsdbtput(&curdbt);
83		}
84	;
85
86Database
87	: STRING
88		{
89			curdbt.name = yylval.str;
90			curdbt.srclist = NULL;
91			curdbt.srclistsize = 0;
92		}
93	;
94
95Srclist
96	: Item
97	| Srclist Item
98	;
99
100Item
101	: STRING
102		{
103			cursrc.flags = NS_SUCCESS;
104			_nsaddsrctomap($1);
105		}
106	| STRING '[' { cursrc.flags = NS_SUCCESS; } Criteria ']'
107		{
108			_nsaddsrctomap($1);
109		}
110	;
111
112Criteria
113	: Criterion
114	| Criteria Criterion
115	;
116
117Criterion
118	: Status '=' Action
119		{
120			if ($3)		/* if action == RETURN set RETURN bit */
121				cursrc.flags |= $1;
122			else		/* else unset it */
123				cursrc.flags &= ~$1;
124		}
125	;
126
127Status
128	: SUCCESS	{ $$ = NS_SUCCESS; }
129	| UNAVAIL	{ $$ = NS_UNAVAIL; }
130	| NOTFOUND	{ $$ = NS_NOTFOUND; }
131	| TRYAGAIN	{ $$ = NS_TRYAGAIN; }
132	;
133
134Action
135	: RETURN	{ $$ = 1L; }
136	| CONTINUE	{ $$ = 0L; }
137	;
138
139%%
140
141static void
142_nsaddsrctomap(elem)
143	const char *elem;
144{
145	int		i, lineno;
146	extern int	_nsyylineno;
147	extern char *	_nsyytext;
148
149	lineno = _nsyylineno - (*_nsyytext == '\n' ? 1 : 0);
150	if (curdbt.srclistsize > 0) {
151		if ((strcasecmp(elem, NSSRC_COMPAT) == 0) ||
152		    (strcasecmp(curdbt.srclist[0].name, NSSRC_COMPAT) == 0)) {
153				/* XXX: syslog the following */
154			warnx("%s line %d: 'compat' used with other sources",
155			    _PATH_NS_CONF, lineno);
156			return;
157		}
158	}
159	for (i = 0; i < curdbt.srclistsize; i++) {
160		if (strcasecmp(curdbt.srclist[i].name, elem) == 0) {
161				/* XXX: syslog the following */
162			warnx("%s line %d: duplicate source '%s'",
163			    _PATH_NS_CONF, lineno, elem);
164			return;
165		}
166	}
167	cursrc.name = elem;
168	_nsdbtaddsrc(&curdbt, &cursrc);
169}
170