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 40 #include <sys/cdefs.h> 41 __FBSDID("$FreeBSD$"); 42 43 #include "namespace.h" 44 #define _NS_PRIVATE 45 #include <nsswitch.h> 46 #include <stdio.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 | Database ':' Srclist NL 86 { 87 _nsdbtput(&curdbt); 88 } 89 | error NL 90 { 91 yyerrok; 92 } 93 ; 94 95 Database 96 : STRING 97 { 98 curdbt.name = yylval.str; 99 curdbt.srclist = NULL; 100 curdbt.srclistsize = 0; 101 } 102 ; 103 104 Srclist 105 : Item 106 | Srclist Item 107 ; 108 109 Item 110 : STRING 111 { 112 cursrc.flags = NS_TERMINATE; 113 _nsaddsrctomap($1); 114 } 115 | STRING '[' { cursrc.flags = NS_SUCCESS; } Criteria ']' 116 { 117 _nsaddsrctomap($1); 118 } 119 ; 120 121 Criteria 122 : Criterion 123 | Criteria Criterion 124 ; 125 126 Criterion 127 : Status '=' Action 128 { 129 if ($3) /* if action == RETURN set RETURN bit */ 130 cursrc.flags |= $1; 131 else /* else unset it */ 132 cursrc.flags &= ~$1; 133 } 134 ; 135 136 Status 137 : SUCCESS { $$ = NS_SUCCESS; } 138 | UNAVAIL { $$ = NS_UNAVAIL; } 139 | NOTFOUND { $$ = NS_NOTFOUND; } 140 | TRYAGAIN { $$ = NS_TRYAGAIN; } 141 ; 142 143 Action 144 : RETURN { $$ = NS_ACTION_RETURN; } 145 | CONTINUE { $$ = NS_ACTION_CONTINUE; } 146 ; 147 148 %% 149 150 static void 151 _nsaddsrctomap(elem) 152 const char *elem; 153 { 154 int i, lineno; 155 extern int _nsyylineno; 156 extern char * _nsyytext; 157 158 lineno = _nsyylineno - (*_nsyytext == '\n' ? 1 : 0); 159 if (curdbt.srclistsize > 0) { 160 if ((strcasecmp(elem, NSSRC_COMPAT) == 0) || 161 (strcasecmp(curdbt.srclist[0].name, NSSRC_COMPAT) == 0)) { 162 syslog(LOG_ERR, 163 "NSSWITCH(nsparser): %s line %d: 'compat' used with other sources", 164 _PATH_NS_CONF, lineno); 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 return; 174 } 175 } 176 cursrc.name = elem; 177 _nsdbtaddsrc(&curdbt, &cursrc); 178 } 179