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 * 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 * $FreeBSD: src/lib/libc/net/nsparser.y,v 1.6 2007/05/17 03:33:23 jon Exp $ 40 */ 41 42 #include "namespace.h" 43 #define _NS_PRIVATE 44 #include <nsswitch.h> 45 #include <stdio.h> 46 #include <stdlib.h> 47 #include <string.h> 48 #include <syslog.h> 49 #include "un-namespace.h" 50 51 static void _nsaddsrctomap(const char *); 52 53 static ns_dbt curdbt; 54 static ns_src cursrc; 55 %} 56 57 %union { 58 char *str; 59 int mapval; 60 } 61 62 %token NL 63 %token SUCCESS UNAVAIL NOTFOUND TRYAGAIN 64 %token RETURN CONTINUE 65 %token ERRORTOKEN 66 %token <str> STRING 67 68 %type <mapval> Status Action 69 70 %% 71 72 File 73 : /* empty */ 74 | Lines 75 ; 76 77 Lines 78 : Entry 79 | Lines Entry 80 ; 81 82 Entry 83 : NL 84 | Database ':' NL 85 { 86 free((char*)curdbt.name); 87 } 88 | Database ':' Srclist NL 89 { 90 _nsdbtput(&curdbt); 91 } 92 | error NL 93 { 94 yyerrok; 95 } 96 ; 97 98 Database 99 : STRING 100 { 101 curdbt.name = yylval.str; 102 curdbt.srclist = NULL; 103 curdbt.srclistsize = 0; 104 } 105 ; 106 107 Srclist 108 : Item 109 | Srclist Item 110 ; 111 112 Item 113 : STRING 114 { 115 cursrc.flags = NS_TERMINATE; 116 _nsaddsrctomap($1); 117 } 118 | STRING '[' { cursrc.flags = NS_SUCCESS; } Criteria ']' 119 { 120 _nsaddsrctomap($1); 121 } 122 ; 123 124 Criteria 125 : Criterion 126 | Criteria Criterion 127 ; 128 129 Criterion 130 : Status '=' Action 131 { 132 if ($3) /* if action == RETURN set RETURN bit */ 133 cursrc.flags |= $1; 134 else /* else unset it */ 135 cursrc.flags &= ~$1; 136 } 137 ; 138 139 Status 140 : SUCCESS { $$ = NS_SUCCESS; } 141 | UNAVAIL { $$ = NS_UNAVAIL; } 142 | NOTFOUND { $$ = NS_NOTFOUND; } 143 | TRYAGAIN { $$ = NS_TRYAGAIN; } 144 ; 145 146 Action 147 : RETURN { $$ = NS_ACTION_RETURN; } 148 | CONTINUE { $$ = NS_ACTION_CONTINUE; } 149 ; 150 151 %% 152 153 static void 154 _nsaddsrctomap(const char *elem) 155 { 156 int i, lineno; 157 extern int _nsyylineno; 158 extern char * _nsyytext; 159 160 lineno = _nsyylineno - (*_nsyytext == '\n' ? 1 : 0); 161 if (curdbt.srclistsize > 0) { 162 if (((strcasecmp(elem, NSSRC_COMPAT) == 0) && 163 (strcasecmp(curdbt.srclist[0].name, NSSRC_CACHE) != 0)) || 164 (strcasecmp(curdbt.srclist[0].name, NSSRC_COMPAT) == 0)) { 165 syslog(LOG_ERR, 166 "NSSWITCH(nsparser): %s line %d: 'compat' used with sources, other than 'cache'", 167 _PATH_NS_CONF, lineno); 168 free((void*)elem); 169 return; 170 } 171 } 172 for (i = 0; i < curdbt.srclistsize; i++) { 173 if (strcasecmp(curdbt.srclist[i].name, elem) == 0) { 174 syslog(LOG_ERR, 175 "NSSWITCH(nsparser): %s line %d: duplicate source '%s'", 176 _PATH_NS_CONF, lineno, elem); 177 free((void*)elem); 178 return; 179 } 180 } 181 cursrc.name = elem; 182 _nsdbtaddsrc(&curdbt, &cursrc); 183 } 184