nsparser.y revision 1.4 
1%{
2/*	$NetBSD: nsparser.y,v 1.4 1999/07/02 15:27:09 kleink 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#include <sys/cdefs.h>
41#if defined(LIBC_SCCS) && !defined(lint)
42__RCSID("$NetBSD: nsparser.y,v 1.4 1999/07/02 15:27:09 kleink Exp $");
43#endif /* LIBC_SCCS and not lint */
44
45#include "namespace.h"
46#include <err.h>
47#define _NS_PRIVATE
48#include <nsswitch.h>
49#include <stdio.h>
50#include <string.h>
51
52
53static	void	_nsaddsrctomap __P((const char *));
54
55static	ns_dbt		curdbt;
56static	ns_src		cursrc;
57%}
58
59%union {
60	char *str;
61	int   mapval;
62}
63
64%token	NL
65%token	SUCCESS UNAVAIL NOTFOUND TRYAGAIN
66%token	RETURN CONTINUE
67%token	<str> STRING
68
69%type	<mapval> Status Action
70
71%%
72
73File
74	:	/* empty */
75	| Lines
76	;
77
78Lines
79	: Entry
80	| Lines Entry
81	;
82
83Entry
84	: NL
85	| Database ':' NL
86	| Database ':' Srclist NL
87		{
88			_nsdbtput(&curdbt);
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_SUCCESS;
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	{ $$ = 1L; }
142	| CONTINUE	{ $$ = 0L; }
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_COMPAT) == 0)) {
159				/* XXX: syslog the following */
160			warnx("%s line %d: 'compat' used with other sources",
161			    _PATH_NS_CONF, lineno);
162			return;
163		}
164	}
165	for (i = 0; i < curdbt.srclistsize; i++) {
166		if (strcasecmp(curdbt.srclist[i].name, elem) == 0) {
167				/* XXX: syslog the following */
168			warnx("%s line %d: duplicate source '%s'",
169			    _PATH_NS_CONF, lineno, elem);
170			return;
171		}
172	}
173	cursrc.name = elem;
174	_nsdbtaddsrc(&curdbt, &cursrc);
175}
176