1 %{ 2 /* $NetBSD: nsparser.y,v 1.3 1999/01/25 00:16:18 lukem Exp $ */ 3 4 /*- 5 * SPDX-License-Identifier: BSD-2-Clause-NetBSD 6 * 7 * Copyright (c) 1997, 1998, 1999 The NetBSD Foundation, Inc. 8 * All rights reserved. 9 * 10 * This code is derived from software contributed to The NetBSD Foundation 11 * by Luke Mewburn. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 23 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 24 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 25 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 26 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 32 * POSSIBILITY OF SUCH DAMAGE. 33 */ 34 35 #include <sys/cdefs.h> 36 __FBSDID("$FreeBSD$"); 37 38 #include "namespace.h" 39 #define _NS_PRIVATE 40 #include <nsswitch.h> 41 #include <stdio.h> 42 #include <stdlib.h> 43 #include <string.h> 44 #include <syslog.h> 45 #include "un-namespace.h" 46 47 static void _nsaddsrctomap(const char *); 48 49 static ns_dbt curdbt; 50 static 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 ERRORTOKEN 62 %token <str> STRING 63 64 %type <mapval> Status Action 65 66 %% 67 68 File 69 : /* empty */ 70 | Lines 71 ; 72 73 Lines 74 : Entry 75 | Lines Entry 76 ; 77 78 Entry 79 : NL 80 | Database ':' NL 81 { 82 free((char*)curdbt.name); 83 } 84 | Database ':' Srclist NL 85 { 86 _nsdbtput(&curdbt); 87 } 88 | error NL 89 { 90 yyerrok; 91 } 92 ; 93 94 Database 95 : STRING 96 { 97 curdbt.name = yylval.str; 98 curdbt.srclist = NULL; 99 curdbt.srclistsize = 0; 100 } 101 ; 102 103 Srclist 104 : Item 105 | Srclist Item 106 ; 107 108 Item 109 : STRING 110 { 111 cursrc.flags = NS_TERMINATE; 112 _nsaddsrctomap($1); 113 } 114 | STRING '[' { cursrc.flags = NS_SUCCESS; } Criteria ']' 115 { 116 _nsaddsrctomap($1); 117 } 118 ; 119 120 Criteria 121 : Criterion 122 | Criteria Criterion 123 ; 124 125 Criterion 126 : Status '=' Action 127 { 128 if ($3) /* if action == RETURN set RETURN bit */ 129 cursrc.flags |= $1; 130 else /* else unset it */ 131 cursrc.flags &= ~$1; 132 } 133 ; 134 135 Status 136 : SUCCESS { $$ = NS_SUCCESS; } 137 | UNAVAIL { $$ = NS_UNAVAIL; } 138 | NOTFOUND { $$ = NS_NOTFOUND; } 139 | TRYAGAIN { $$ = NS_TRYAGAIN; } 140 ; 141 142 Action 143 : RETURN { $$ = NS_ACTION_RETURN; } 144 | CONTINUE { $$ = NS_ACTION_CONTINUE; } 145 ; 146 147 %% 148 149 static void 150 _nsaddsrctomap(const char *elem) 151 { 152 int i, lineno; 153 extern int _nsyylineno; 154 extern char * _nsyytext; 155 156 lineno = _nsyylineno - (*_nsyytext == '\n' ? 1 : 0); 157 if (curdbt.srclistsize > 0) { 158 if (((strcasecmp(elem, NSSRC_COMPAT) == 0) && 159 (strcasecmp(curdbt.srclist[0].name, NSSRC_CACHE) != 0)) || 160 (strcasecmp(curdbt.srclist[0].name, NSSRC_COMPAT) == 0)) { 161 syslog(LOG_ERR, 162 "NSSWITCH(nsparser): %s line %d: 'compat' used with sources, other than 'cache'", 163 _PATH_NS_CONF, lineno); 164 free((void*)elem); 165 return; 166 } 167 } 168 for (i = 0; i < curdbt.srclistsize; i++) { 169 if (strcasecmp(curdbt.srclist[i].name, elem) == 0) { 170 syslog(LOG_ERR, 171 "NSSWITCH(nsparser): %s line %d: duplicate source '%s'", 172 _PATH_NS_CONF, lineno, elem); 173 free((void*)elem); 174 return; 175 } 176 } 177 cursrc.name = elem; 178 _nsdbtaddsrc(&curdbt, &cursrc); 179 } 180