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 * 20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #include <sys/cdefs.h> 34 __FBSDID("$FreeBSD$"); 35 36 #include "namespace.h" 37 #define _NS_PRIVATE 38 #include <nsswitch.h> 39 #include <stdio.h> 40 #include <stdlib.h> 41 #include <string.h> 42 #include <syslog.h> 43 #include "un-namespace.h" 44 45 static void _nsaddsrctomap(const char *); 46 47 static ns_dbt curdbt; 48 static ns_src cursrc; 49 %} 50 51 %union { 52 char *str; 53 int mapval; 54 } 55 56 %token NL 57 %token SUCCESS UNAVAIL NOTFOUND TRYAGAIN 58 %token RETURN CONTINUE 59 %token ERRORTOKEN 60 %token <str> STRING 61 62 %type <mapval> Status Action 63 64 %% 65 66 File 67 : /* empty */ 68 | Lines 69 ; 70 71 Lines 72 : Entry 73 | Lines Entry 74 ; 75 76 Entry 77 : NL 78 | Database ':' NL 79 { 80 free((char*)curdbt.name); 81 } 82 | Database ':' Srclist NL 83 { 84 _nsdbtput(&curdbt); 85 } 86 | error NL 87 { 88 yyerrok; 89 } 90 ; 91 92 Database 93 : STRING 94 { 95 curdbt.name = yylval.str; 96 curdbt.srclist = NULL; 97 curdbt.srclistsize = 0; 98 } 99 ; 100 101 Srclist 102 : Item 103 | Srclist Item 104 ; 105 106 Item 107 : STRING 108 { 109 cursrc.flags = NS_TERMINATE; 110 _nsaddsrctomap($1); 111 } 112 | STRING '[' { cursrc.flags = NS_SUCCESS; } Criteria ']' 113 { 114 _nsaddsrctomap($1); 115 } 116 ; 117 118 Criteria 119 : Criterion 120 | Criteria Criterion 121 ; 122 123 Criterion 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 ; 132 133 Status 134 : SUCCESS { $$ = NS_SUCCESS; } 135 | UNAVAIL { $$ = NS_UNAVAIL; } 136 | NOTFOUND { $$ = NS_NOTFOUND; } 137 | TRYAGAIN { $$ = NS_TRYAGAIN; } 138 ; 139 140 Action 141 : RETURN { $$ = NS_ACTION_RETURN; } 142 | CONTINUE { $$ = NS_ACTION_CONTINUE; } 143 ; 144 145 %% 146 147 static 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_CACHE) != 0)) || 159 (strcasecmp(curdbt.srclist[0].name, NSSRC_COMPAT) == 0)) { 160 syslog(LOG_ERR, 161 "NSSWITCH(nsparser): %s line %d: 'compat' used with sources, other than 'cache'", 162 _PATH_NS_CONF, lineno); 163 free((void*)elem); 164 return; 165 } 166 } 167 for (i = 0; i < curdbt.srclistsize; i++) { 168 if (strcasecmp(curdbt.srclist[i].name, elem) == 0) { 169 syslog(LOG_ERR, 170 "NSSWITCH(nsparser): %s line %d: duplicate source '%s'", 171 _PATH_NS_CONF, lineno, elem); 172 free((void*)elem); 173 return; 174 } 175 } 176 cursrc.name = elem; 177 _nsdbtaddsrc(&curdbt, &cursrc); 178 } 179