1 /* $NetBSD: catopen.c,v 1.28 2009/03/10 13:15:40 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 #if defined(LIBC_SCCS) && !defined(lint) 34 __RCSID("$NetBSD: catopen.c,v 1.28 2009/03/10 13:15:40 joerg Exp $"); 35 #endif /* LIBC_SCCS and not lint */ 36 37 #define _NLS_PRIVATE 38 39 #include "namespace.h" 40 #include <sys/param.h> 41 #include <sys/stat.h> 42 #include <sys/mman.h> 43 44 #include <assert.h> 45 #include <fcntl.h> 46 #include <limits.h> 47 #include <locale.h> 48 #include <nl_types.h> 49 #include <stdlib.h> 50 #include <string.h> 51 #include <unistd.h> 52 53 #ifdef HAVE_CITRUS 54 #include "citrus_namespace.h" 55 #include "citrus_bcs.h" 56 #include "citrus_region.h" 57 #include "citrus_lookup.h" 58 #include "citrus_aliasname_local.h" 59 #else 60 #include "aliasname_local.h" 61 #endif 62 63 #define NLS_ALIAS_DB "/usr/share/nls/nls.alias" 64 65 #define NLS_DEFAULT_PATH "/usr/share/nls/%L/%N.cat:/usr/share/nls/%N/%L" 66 #define NLS_DEFAULT_LANG "C" 67 68 #ifdef __weak_alias 69 __weak_alias(catopen, _catopen) 70 #endif 71 72 static nl_catd load_msgcat __P((const char *)); 73 74 nl_catd 75 _catopen(name, oflag) 76 const char *name; 77 int oflag; 78 { 79 char tmppath[PATH_MAX+1]; 80 const char *nlspath; 81 const char *lang, *reallang; 82 char *t; 83 const char *s, *u; 84 nl_catd catd; 85 char langbuf[PATH_MAX]; 86 87 if (name == NULL || *name == '\0') 88 return (nl_catd)-1; 89 90 /* absolute or relative path? */ 91 if (strchr(name, '/')) 92 return load_msgcat(name); 93 94 if (issetugid() || (nlspath = getenv("NLSPATH")) == NULL) 95 nlspath = NLS_DEFAULT_PATH; 96 if (oflag == NL_CAT_LOCALE) { 97 lang = setlocale(LC_MESSAGES, NULL); 98 } 99 else { 100 lang = getenv("LANG"); 101 } 102 if (lang == NULL || strchr(lang, '/')) 103 lang = NLS_DEFAULT_LANG; 104 105 reallang = __unaliasname(NLS_ALIAS_DB, lang, langbuf, sizeof(langbuf)); 106 if (reallang == NULL) 107 reallang = lang; 108 109 s = nlspath; 110 t = tmppath; 111 do { 112 while (*s && *s != ':') { 113 if (*s == '%') { 114 switch (*(++s)) { 115 case 'L': /* locale */ 116 u = reallang; 117 while (*u && t < tmppath + PATH_MAX) 118 *t++ = *u++; 119 break; 120 case 'N': /* name */ 121 u = name; 122 while (*u && t < tmppath + PATH_MAX) 123 *t++ = *u++; 124 break; 125 case 'l': /* lang */ 126 case 't': /* territory */ 127 case 'c': /* codeset */ 128 break; 129 default: 130 if (t < tmppath + PATH_MAX) 131 *t++ = *s; 132 } 133 } else { 134 if (t < tmppath + PATH_MAX) 135 *t++ = *s; 136 } 137 s++; 138 } 139 140 *t = '\0'; 141 catd = load_msgcat(tmppath); 142 if (catd != (nl_catd)-1) 143 return catd; 144 145 if (*s) 146 s++; 147 t = tmppath; 148 } while (*s); 149 150 return (nl_catd)-1; 151 } 152 153 static nl_catd 154 load_msgcat(path) 155 const char *path; 156 { 157 struct stat st; 158 nl_catd catd; 159 void *data; 160 int fd; 161 162 _DIAGASSERT(path != NULL); 163 164 if ((fd = open(path, O_RDONLY)) == -1) 165 return (nl_catd)-1; 166 167 if (fstat(fd, &st) != 0) { 168 close (fd); 169 return (nl_catd)-1; 170 } 171 172 data = mmap(0, (size_t)st.st_size, PROT_READ, MAP_FILE|MAP_SHARED, fd, 173 (off_t)0); 174 close (fd); 175 176 if (data == MAP_FAILED) { 177 return (nl_catd)-1; 178 } 179 180 if (ntohl((u_int32_t)((struct _nls_cat_hdr *)data)->__magic) != 181 _NLS_MAGIC) { 182 munmap(data, (size_t)st.st_size); 183 return (nl_catd)-1; 184 } 185 186 if ((catd = malloc(sizeof (*catd))) == NULL) { 187 munmap(data, (size_t)st.st_size); 188 return (nl_catd)-1; 189 } 190 191 catd->__data = data; 192 catd->__size = (int)st.st_size; 193 return catd; 194 } 195