1 %{ 2 /* $NetBSD: nsparser.y,v 1.9 2004/01/25 16:38:15 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 #if defined(LIBC_SCCS) && !defined(lint) 42 __RCSID("$NetBSD: nsparser.y,v 1.9 2004/01/25 16:38:15 lukem Exp $"); 43 #endif /* LIBC_SCCS and not lint */ 44 45 #include "namespace.h" 46 47 #include <assert.h> 48 #define _NS_PRIVATE 49 #include <nsswitch.h> 50 #include <stdio.h> 51 #include <string.h> 52 #include <syslog.h> 53 54 55 static void _nsaddsrctomap __P((const char *)); 56 57 static ns_dbt curdbt; 58 static ns_src cursrc; 59 60 extern char * _nsyytext; 61 extern int _nsyylineno; 62 %} 63 64 %union { 65 char *str; 66 int mapval; 67 } 68 69 %token NL 70 %token SUCCESS UNAVAIL NOTFOUND TRYAGAIN 71 %token RETURN CONTINUE 72 %token <str> STRING 73 74 %type <mapval> Status Action 75 76 %% 77 78 File 79 : /* empty */ 80 | Lines 81 ; 82 83 Lines 84 : Entry 85 | Lines Entry 86 ; 87 88 Entry 89 : NL 90 | Database ':' NL 91 | Database ':' Srclist NL 92 { 93 int lineno; 94 95 lineno = _nsyylineno - (*_nsyytext == '\n' ? 1 : 0); 96 if (_nsdbtput(&curdbt) == -1) 97 syslog(LOG_WARNING, 98 "libc nsdispatch: %s line %d: %s", 99 _PATH_NS_CONF, lineno, 100 "error adding entry"); 101 } 102 | error NL 103 { 104 yyerrok; 105 } 106 ; 107 108 Database 109 : STRING 110 { 111 curdbt.name = yylval.str; 112 curdbt.srclist = NULL; 113 curdbt.srclistsize = 0; 114 } 115 ; 116 117 Srclist 118 : Item 119 | Srclist Item 120 ; 121 122 Item 123 : STRING 124 { 125 cursrc.flags = NS_SUCCESS; 126 _nsaddsrctomap($1); 127 } 128 | STRING '[' { cursrc.flags = NS_SUCCESS; } Criteria ']' 129 { 130 _nsaddsrctomap($1); 131 } 132 ; 133 134 Criteria 135 : Criterion 136 | Criteria Criterion 137 ; 138 139 Criterion 140 : Status '=' Action 141 { 142 if ($3) /* if action == RETURN set RETURN bit */ 143 cursrc.flags |= $1; 144 else /* else unset it */ 145 cursrc.flags &= ~$1; 146 } 147 ; 148 149 Status 150 : SUCCESS { $$ = NS_SUCCESS; } 151 | UNAVAIL { $$ = NS_UNAVAIL; } 152 | NOTFOUND { $$ = NS_NOTFOUND; } 153 | TRYAGAIN { $$ = NS_TRYAGAIN; } 154 ; 155 156 Action 157 : RETURN { $$ = 1L; } 158 | CONTINUE { $$ = 0L; } 159 ; 160 161 %% 162 163 static void 164 _nsaddsrctomap(elem) 165 const char *elem; 166 { 167 int i, lineno; 168 169 _DIAGASSERT(elem != NULL); 170 171 lineno = _nsyylineno - (*_nsyytext == '\n' ? 1 : 0); 172 if (curdbt.srclistsize > 0) { 173 if ((strcasecmp(elem, NSSRC_COMPAT) == 0) || 174 (strcasecmp(curdbt.srclist[0].name, NSSRC_COMPAT) == 0)) { 175 syslog(LOG_WARNING, 176 "libc nsdispatch: %s line %d: %s", 177 _PATH_NS_CONF, lineno, 178 "'compat' used with other sources"); 179 return; 180 } 181 } 182 for (i = 0; i < curdbt.srclistsize; i++) { 183 if (strcasecmp(curdbt.srclist[i].name, elem) == 0) { 184 syslog(LOG_WARNING, 185 "libc nsdispatch: %s line %d: %s '%s'", 186 _PATH_NS_CONF, lineno, 187 "duplicate source", elem); 188 return; 189 } 190 } 191 cursrc.name = elem; 192 if (_nsdbtaddsrc(&curdbt, &cursrc) == -1) { 193 syslog(LOG_WARNING, 194 "libc nsdispatch: %s line %d: %s '%s'", 195 _PATH_NS_CONF, lineno, 196 "error adding", elem); 197 } 198 } 199