1 /* $NetBSD: catopen.c,v 1.25 2008/04/28 20:23:00 martin 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 1.25 2008/04/28 20:23:00 martin 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 CITRUS 54 #include <citrus/citrus_namespace.h> 55 #include <citrus/citrus_region.h> 56 #include <citrus/citrus_lookup.h> 57 #else 58 #include <locale/aliasname_local.h> 59 #define _lookup_alias(p, a, b, s, c) __unaliasname((p), (a), (b), (s)) 60 #endif 61 62 #define NLS_ALIAS_DB "/usr/share/nls/nls.alias" 63 64 #define NLS_DEFAULT_PATH "/usr/share/nls/%L/%N.cat:/usr/share/nls/%N/%L" 65 #define NLS_DEFAULT_LANG "C" 66 67 #ifdef __weak_alias 68 __weak_alias(catopen, _catopen) 69 #endif 70 71 static nl_catd load_msgcat __P((const char *)); 72 73 nl_catd 74 _catopen(name, oflag) 75 const char *name; 76 int oflag; 77 { 78 char tmppath[PATH_MAX+1]; 79 const char *nlspath; 80 const char *lang; 81 char *t; 82 const char *s, *u; 83 nl_catd catd; 84 char langbuf[PATH_MAX]; 85 86 if (name == NULL || *name == '\0') 87 return (nl_catd)-1; 88 89 /* absolute or relative path? */ 90 if (strchr(name, '/')) 91 return load_msgcat(name); 92 93 if (issetugid() || (nlspath = getenv("NLSPATH")) == NULL) 94 nlspath = NLS_DEFAULT_PATH; 95 if (oflag == NL_CAT_LOCALE) { 96 lang = setlocale(LC_MESSAGES, NULL); 97 } 98 else { 99 lang = getenv("LANG"); 100 } 101 if (lang == NULL || strchr(lang, '/')) 102 lang = NLS_DEFAULT_LANG; 103 104 lang = _lookup_alias(NLS_ALIAS_DB, lang, langbuf, sizeof(langbuf), 105 _LOOKUP_CASE_SENSITIVE); 106 107 s = nlspath; 108 t = tmppath; 109 do { 110 while (*s && *s != ':') { 111 if (*s == '%') { 112 switch (*(++s)) { 113 case 'L': /* locale */ 114 u = lang; 115 while (*u && t < tmppath + PATH_MAX) 116 *t++ = *u++; 117 break; 118 case 'N': /* name */ 119 u = name; 120 while (*u && t < tmppath + PATH_MAX) 121 *t++ = *u++; 122 break; 123 case 'l': /* lang */ 124 case 't': /* territory */ 125 case 'c': /* codeset */ 126 break; 127 default: 128 if (t < tmppath + PATH_MAX) 129 *t++ = *s; 130 } 131 } else { 132 if (t < tmppath + PATH_MAX) 133 *t++ = *s; 134 } 135 s++; 136 } 137 138 *t = '\0'; 139 catd = load_msgcat(tmppath); 140 if (catd != (nl_catd)-1) 141 return catd; 142 143 if (*s) 144 s++; 145 t = tmppath; 146 } while (*s); 147 148 return (nl_catd)-1; 149 } 150 151 static nl_catd 152 load_msgcat(path) 153 const char *path; 154 { 155 struct stat st; 156 nl_catd catd; 157 void *data; 158 int fd; 159 160 _DIAGASSERT(path != NULL); 161 162 if ((fd = open(path, O_RDONLY)) == -1) 163 return (nl_catd)-1; 164 165 if (fstat(fd, &st) != 0) { 166 close (fd); 167 return (nl_catd)-1; 168 } 169 170 data = mmap(0, (size_t)st.st_size, PROT_READ, MAP_FILE|MAP_SHARED, fd, 171 (off_t)0); 172 close (fd); 173 174 if (data == (void *)-1) { 175 return (nl_catd)-1; 176 } 177 178 if (ntohl((u_int32_t)((struct _nls_cat_hdr *)data)->__magic) != 179 _NLS_MAGIC) { 180 munmap(data, (size_t)st.st_size); 181 return (nl_catd)-1; 182 } 183 184 if ((catd = malloc(sizeof (*catd))) == 0) { 185 munmap(data, (size_t)st.st_size); 186 return (nl_catd)-1; 187 } 188 189 catd->__data = data; 190 catd->__size = (int)st.st_size; 191 return catd; 192 } 193