1 %{ 2 /* $NetBSD: nsparser.y,v 1.11 2009/02/05 13:21:11 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 #if defined(LIBC_SCCS) && !defined(lint) 35 __RCSID("$NetBSD: nsparser.y,v 1.11 2009/02/05 13:21:11 lukem Exp $"); 36 #endif /* LIBC_SCCS and not lint */ 37 38 #include "namespace.h" 39 40 #include <assert.h> 41 #define _NS_PRIVATE 42 #include <nsswitch.h> 43 #include <stdio.h> 44 #include <string.h> 45 #include <syslog.h> 46 47 48 static void _nsaddsrctomap __P((const char *)); 49 50 static ns_dbt curdbt; 51 static ns_src cursrc; 52 53 extern char * _nsyytext; 54 extern int _nsyylineno; 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 <str> STRING 66 67 %type <mapval> Status Action 68 69 %% 70 71 File 72 : /* empty */ 73 | Lines 74 ; 75 76 Lines 77 : Entry 78 | Lines Entry 79 ; 80 81 Entry 82 : NL 83 | Database ':' NL 84 | Database ':' Srclist NL 85 { 86 int lineno; 87 88 lineno = _nsyylineno - (*_nsyytext == '\n' ? 1 : 0); 89 if (_nsdbtput(&curdbt) == -1) 90 syslog(LOG_WARNING, 91 "libc nsdispatch: %s line %d: %s", 92 _PATH_NS_CONF, lineno, 93 "error adding entry"); 94 } 95 | error NL 96 { 97 yyerrok; 98 } 99 ; 100 101 Database 102 : STRING 103 { 104 curdbt.name = yylval.str; 105 curdbt.srclist = NULL; 106 curdbt.srclistsize = 0; 107 } 108 ; 109 110 Srclist 111 : Item 112 | Srclist Item 113 ; 114 115 Item 116 : STRING 117 { 118 cursrc.flags = NS_SUCCESS; 119 _nsaddsrctomap($1); 120 } 121 | STRING '[' { cursrc.flags = NS_SUCCESS; } Criteria ']' 122 { 123 _nsaddsrctomap($1); 124 } 125 ; 126 127 Criteria 128 : Criterion 129 | Criteria Criterion 130 ; 131 132 Criterion 133 : Status '=' Action 134 { 135 if ($3) /* if action == RETURN set RETURN bit */ 136 cursrc.flags |= $1; 137 else /* else unset it */ 138 cursrc.flags &= ~$1; 139 } 140 ; 141 142 Status 143 : SUCCESS { $$ = NS_SUCCESS; } 144 | UNAVAIL { $$ = NS_UNAVAIL; } 145 | NOTFOUND { $$ = NS_NOTFOUND; } 146 | TRYAGAIN { $$ = NS_TRYAGAIN; } 147 ; 148 149 Action 150 : RETURN { $$ = 1L; } 151 | CONTINUE { $$ = 0L; } 152 ; 153 154 %% 155 156 static void 157 _nsaddsrctomap(elem) 158 const char *elem; 159 { 160 unsigned int i; 161 int lineno; 162 163 _DIAGASSERT(elem != NULL); 164 165 lineno = _nsyylineno - (*_nsyytext == '\n' ? 1 : 0); 166 if (curdbt.srclistsize > 0) { 167 if ((strcasecmp(elem, NSSRC_COMPAT) == 0) || 168 (strcasecmp(curdbt.srclist[0].name, NSSRC_COMPAT) == 0)) { 169 syslog(LOG_WARNING, 170 "libc nsdispatch: %s line %d: %s", 171 _PATH_NS_CONF, lineno, 172 "'compat' used with other sources"); 173 return; 174 } 175 } 176 for (i = 0; i < curdbt.srclistsize; i++) { 177 if (strcasecmp(curdbt.srclist[i].name, elem) == 0) { 178 syslog(LOG_WARNING, 179 "libc nsdispatch: %s line %d: %s '%s'", 180 _PATH_NS_CONF, lineno, 181 "duplicate source", elem); 182 return; 183 } 184 } 185 cursrc.name = elem; 186 if (_nsdbtaddsrc(&curdbt, &cursrc) == -1) { 187 syslog(LOG_WARNING, 188 "libc nsdispatch: %s line %d: %s '%s'", 189 _PATH_NS_CONF, lineno, 190 "error adding", elem); 191 } 192 } 193