1 /* $NetBSD: catopen.c,v 1.32 2013/08/19 08:03:34 joerg Exp $ */ 2 3 /*- 4 * Copyright (c) 1996 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by J.T. Conklin. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __RCSID("$NetBSD: catopen.c,v 1.32 2013/08/19 08:03:34 joerg Exp $"); 34 35 #define _NLS_PRIVATE 36 #define __SETLOCALE_SOURCE__ 37 38 #include "namespace.h" 39 #include <sys/param.h> 40 #include <sys/stat.h> 41 #include <sys/mman.h> 42 43 #include <assert.h> 44 #include <fcntl.h> 45 #include <limits.h> 46 #include <locale.h> 47 #include <nl_types.h> 48 #include <stdlib.h> 49 #include <string.h> 50 #include <unistd.h> 51 52 #include "citrus_namespace.h" 53 #include "citrus_bcs.h" 54 #include "citrus_region.h" 55 #include "citrus_lookup.h" 56 #include "citrus_aliasname_local.h" 57 #include "setlocale_local.h" 58 59 #define NLS_ALIAS_DB "/usr/share/nls/nls.alias" 60 61 #define NLS_DEFAULT_PATH "/usr/share/nls/%L/%N.cat:/usr/share/nls/%N/%L" 62 #define NLS_DEFAULT_LANG "C" 63 64 #if defined(__minix) && !defined(MAP_SHARED) 65 #define MAP_SHARED MAP_PRIVATE /* LSC: We lose some memory, but it's OK as this is RO. */ 66 #endif /* defined(__minix) && !defined(MAP_SHARED) */ 67 68 __weak_alias(catopen, _catopen) 69 __weak_alias(catopen_l, _catopen_l) 70 71 static nl_catd load_msgcat(const char *); 72 73 nl_catd 74 catopen(const char *name, int oflag) 75 { 76 77 return catopen_l(name, oflag, _current_locale()); 78 } 79 80 nl_catd 81 catopen_l(const char *name, int oflag, locale_t loc) 82 { 83 char tmppath[PATH_MAX+1]; 84 const char *nlspath; 85 const char *lang, *reallang; 86 char *t; 87 const char *s, *u; 88 nl_catd catd; 89 char langbuf[PATH_MAX]; 90 91 if (name == NULL || *name == '\0') 92 return (nl_catd)-1; 93 94 /* absolute or relative path? */ 95 if (strchr(name, '/')) 96 return load_msgcat(name); 97 98 if (issetugid() || (nlspath = getenv("NLSPATH")) == NULL) 99 nlspath = NLS_DEFAULT_PATH; 100 /* 101 * Historical note: 102 * http://www.hauN.org/ml/b-l-j/a/800/828.html (in japanese) 103 */ 104 if (oflag == NL_CAT_LOCALE) { 105 lang = loc->part_name[LC_MESSAGES]; 106 } else { 107 lang = getenv("LANG"); 108 } 109 if (lang == NULL || strchr(lang, '/')) 110 lang = NLS_DEFAULT_LANG; 111 112 reallang = __unaliasname(NLS_ALIAS_DB, lang, langbuf, sizeof(langbuf)); 113 if (reallang == NULL) 114 reallang = lang; 115 116 s = nlspath; 117 t = tmppath; 118 do { 119 while (*s && *s != ':') { 120 if (*s == '%') { 121 switch (*(++s)) { 122 case 'L': /* locale */ 123 u = reallang; 124 while (*u && t < tmppath + PATH_MAX) 125 *t++ = *u++; 126 break; 127 case 'N': /* name */ 128 u = name; 129 while (*u && t < tmppath + PATH_MAX) 130 *t++ = *u++; 131 break; 132 case 'l': /* lang */ 133 case 't': /* territory */ 134 case 'c': /* codeset */ 135 break; 136 default: 137 if (t < tmppath + PATH_MAX) 138 *t++ = *s; 139 } 140 } else { 141 if (t < tmppath + PATH_MAX) 142 *t++ = *s; 143 } 144 s++; 145 } 146 147 *t = '\0'; 148 catd = load_msgcat(tmppath); 149 if (catd != (nl_catd)-1) 150 return catd; 151 152 if (*s) 153 s++; 154 t = tmppath; 155 } while (*s); 156 157 return (nl_catd)-1; 158 } 159 160 static nl_catd 161 load_msgcat(const char *path) 162 { 163 struct stat st; 164 nl_catd catd; 165 void *data; 166 int fd; 167 168 _DIAGASSERT(path != NULL); 169 170 if ((fd = open(path, O_RDONLY)) == -1) 171 return (nl_catd)-1; 172 173 if (fstat(fd, &st) != 0) { 174 close (fd); 175 return (nl_catd)-1; 176 } 177 178 data = mmap(0, (size_t)st.st_size, PROT_READ, MAP_FILE|MAP_SHARED, fd, 179 (off_t)0); 180 close (fd); 181 182 if (data == MAP_FAILED) { 183 return (nl_catd)-1; 184 } 185 186 if (ntohl((u_int32_t)((struct _nls_cat_hdr *)data)->__magic) != 187 _NLS_MAGIC) { 188 munmap(data, (size_t)st.st_size); 189 return (nl_catd)-1; 190 } 191 192 if ((catd = malloc(sizeof (*catd))) == NULL) { 193 munmap(data, (size_t)st.st_size); 194 return (nl_catd)-1; 195 } 196 197 catd->__data = data; 198 catd->__size = (int)st.st_size; 199 return catd; 200 } 201