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 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 "namespace.h" 36 #define _NS_PRIVATE 37 #include <nsswitch.h> 38 #include <stdio.h> 39 #include <stdlib.h> 40 #include <string.h> 41 #include <syslog.h> 42 #include "un-namespace.h" 43 44 static void _nsaddsrctomap(const char *); 45 46 static ns_dbt curdbt; 47 static ns_src cursrc; 48 %} 49 50 %union { 51 char *str; 52 int mapval; 53 } 54 55 %token NL 56 %token SUCCESS UNAVAIL NOTFOUND TRYAGAIN 57 %token RETURN CONTINUE 58 %token ERRORTOKEN 59 %token <str> STRING 60 61 %type <mapval> Status Action 62 63 %% 64 65 File 66 : /* empty */ 67 | Lines 68 ; 69 70 Lines 71 : Entry 72 | Lines Entry 73 ; 74 75 Entry 76 : NL 77 | Database ':' NL 78 { 79 free((char*)curdbt.name); 80 } 81 | Database ':' Srclist NL 82 { 83 _nsdbtput(&curdbt); 84 } 85 | error NL 86 { 87 yyerrok; 88 } 89 ; 90 91 Database 92 : STRING 93 { 94 curdbt.name = yylval.str; 95 curdbt.srclist = NULL; 96 curdbt.srclistsize = 0; 97 } 98 ; 99 100 Srclist 101 : Item 102 | Srclist Item 103 ; 104 105 Item 106 : STRING 107 { 108 cursrc.flags = NS_TERMINATE; 109 _nsaddsrctomap($1); 110 } 111 | STRING '[' { cursrc.flags = NS_SUCCESS; } Criteria ']' 112 { 113 _nsaddsrctomap($1); 114 } 115 ; 116 117 Criteria 118 : Criterion 119 | Criteria Criterion 120 ; 121 122 Criterion 123 : Status '=' Action 124 { 125 if ($3) /* if action == RETURN set RETURN bit */ 126 cursrc.flags |= $1; 127 else /* else unset it */ 128 cursrc.flags &= ~$1; 129 } 130 ; 131 132 Status 133 : SUCCESS { $$ = NS_SUCCESS; } 134 | UNAVAIL { $$ = NS_UNAVAIL; } 135 | NOTFOUND { $$ = NS_NOTFOUND; } 136 | TRYAGAIN { $$ = NS_TRYAGAIN; } 137 ; 138 139 Action 140 : RETURN { $$ = NS_ACTION_RETURN; } 141 | CONTINUE { $$ = NS_ACTION_CONTINUE; } 142 ; 143 144 %% 145 146 static void 147 _nsaddsrctomap(const char *elem) 148 { 149 int i, lineno; 150 extern int _nsyylineno; 151 extern char * _nsyytext; 152 153 lineno = _nsyylineno - (*_nsyytext == '\n' ? 1 : 0); 154 if (curdbt.srclistsize > 0) { 155 if (((strcasecmp(elem, NSSRC_COMPAT) == 0) && 156 (strcasecmp(curdbt.srclist[0].name, NSSRC_CACHE) != 0)) || 157 (strcasecmp(curdbt.srclist[0].name, NSSRC_COMPAT) == 0)) { 158 syslog(LOG_ERR, 159 "NSSWITCH(nsparser): %s line %d: 'compat' used with sources, other than 'cache'", 160 _PATH_NS_CONF, lineno); 161 free((void*)elem); 162 return; 163 } 164 } 165 for (i = 0; i < curdbt.srclistsize; i++) { 166 if (strcasecmp(curdbt.srclist[i].name, elem) == 0) { 167 syslog(LOG_ERR, 168 "NSSWITCH(nsparser): %s line %d: duplicate source '%s'", 169 _PATH_NS_CONF, lineno, elem); 170 free((void*)elem); 171 return; 172 } 173 } 174 cursrc.name = elem; 175 _nsdbtaddsrc(&curdbt, &cursrc); 176 } 177