1 %{ 2 /* $NetBSD: nsparser.y,v 1.12 2012/03/20 17:44:18 matt 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 1.12 2012/03/20 17:44:18 matt Exp $"); 36 #endif /* LIBC_SCCS and not lint */ 37 38 #include <assert.h> 39 #define _NS_PRIVATE 40 #include <nsswitch.h> 41 #include <stdio.h> 42 #include <string.h> 43 #include <syslog.h> 44 45 int yylex(); 46 void yyerror(const char *s); 47 48 static void _nsaddsrctomap(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 %name-prefix "_nsyy" 58 59 %union { 60 char *str; 61 int mapval; 62 } 63 64 %token NL 65 %token SUCCESS UNAVAIL NOTFOUND TRYAGAIN 66 %token RETURN CONTINUE 67 %token <str> STRING 68 69 %type <mapval> Status Action 70 71 %% 72 73 File 74 : /* empty */ 75 | Lines 76 ; 77 78 Lines 79 : Entry 80 | Lines Entry 81 ; 82 83 Entry 84 : NL 85 | Database ':' NL 86 | Database ':' Srclist NL 87 { 88 int lineno; 89 90 lineno = _nsyylineno - (*_nsyytext == '\n' ? 1 : 0); 91 if (_nsdbtput(&curdbt) == -1) 92 syslog(LOG_WARNING, 93 "libc nsdispatch: %s line %d: %s", 94 _PATH_NS_CONF, lineno, 95 "error adding entry"); 96 } 97 | error NL 98 { 99 yyerrok; 100 } 101 ; 102 103 Database 104 : STRING 105 { 106 curdbt.name = yylval.str; 107 curdbt.srclist = NULL; 108 curdbt.srclistsize = 0; 109 } 110 ; 111 112 Srclist 113 : Item 114 | Srclist Item 115 ; 116 117 Item 118 : STRING 119 { 120 cursrc.flags = NS_SUCCESS; 121 _nsaddsrctomap($1); 122 } 123 | STRING '[' { cursrc.flags = NS_SUCCESS; } Criteria ']' 124 { 125 _nsaddsrctomap($1); 126 } 127 ; 128 129 Criteria 130 : Criterion 131 | Criteria Criterion 132 ; 133 134 Criterion 135 : Status '=' Action 136 { 137 if ($3) /* if action == RETURN set RETURN bit */ 138 cursrc.flags |= $1; 139 else /* else unset it */ 140 cursrc.flags &= ~$1; 141 } 142 ; 143 144 Status 145 : SUCCESS { $$ = NS_SUCCESS; } 146 | UNAVAIL { $$ = NS_UNAVAIL; } 147 | NOTFOUND { $$ = NS_NOTFOUND; } 148 | TRYAGAIN { $$ = NS_TRYAGAIN; } 149 ; 150 151 Action 152 : RETURN { $$ = 1L; } 153 | CONTINUE { $$ = 0L; } 154 ; 155 156 %% 157 158 static void 159 _nsaddsrctomap(const char *elem) 160 { 161 unsigned int i; 162 int lineno; 163 164 assert(elem != NULL); 165 166 lineno = _nsyylineno - (*_nsyytext == '\n' ? 1 : 0); 167 if (curdbt.srclistsize > 0) { 168 if ((strcasecmp(elem, NSSRC_COMPAT) == 0) || 169 (strcasecmp(curdbt.srclist[0].name, NSSRC_COMPAT) == 0)) { 170 syslog(LOG_WARNING, 171 "libc nsdispatch: %s line %d: %s", 172 _PATH_NS_CONF, lineno, 173 "'compat' used with other sources"); 174 return; 175 } 176 } 177 for (i = 0; i < curdbt.srclistsize; i++) { 178 if (strcasecmp(curdbt.srclist[i].name, elem) == 0) { 179 syslog(LOG_WARNING, 180 "libc nsdispatch: %s line %d: %s '%s'", 181 _PATH_NS_CONF, lineno, 182 "duplicate source", elem); 183 return; 184 } 185 } 186 cursrc.name = elem; 187 if (_nsdbtaddsrc(&curdbt, &cursrc) == -1) { 188 syslog(LOG_WARNING, 189 "libc nsdispatch: %s line %d: %s '%s'", 190 _PATH_NS_CONF, lineno, 191 "error adding", elem); 192 } 193 } 194