1 /* $NetBSD: catopen.c,v 1.23 2005/11/29 03:12:00 christos 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 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #include <sys/cdefs.h> 40 #if defined(LIBC_SCCS) && !defined(lint) 41 __RCSID("$NetBSD: catopen.c,v 1.23 2005/11/29 03:12:00 christos Exp $"); 42 #endif /* LIBC_SCCS and not lint */ 43 44 #define _NLS_PRIVATE 45 46 #include "namespace.h" 47 #include <sys/param.h> 48 #include <sys/stat.h> 49 #include <sys/mman.h> 50 51 #include <assert.h> 52 #include <fcntl.h> 53 #include <limits.h> 54 #include <locale.h> 55 #include <nl_types.h> 56 #include <stdlib.h> 57 #include <string.h> 58 #include <unistd.h> 59 60 #ifdef CITRUS 61 #include <citrus/citrus_namespace.h> 62 #include <citrus/citrus_region.h> 63 #include <citrus/citrus_lookup.h> 64 #else 65 #include <locale/aliasname_local.h> 66 #define _lookup_alias(p, a, b, s, c) __unaliasname((p), (a), (b), (s)) 67 #endif 68 69 #define NLS_ALIAS_DB "/usr/share/nls/nls.alias" 70 71 #define NLS_DEFAULT_PATH "/usr/share/nls/%L/%N.cat:/usr/share/nls/%N/%L" 72 #define NLS_DEFAULT_LANG "C" 73 74 #ifdef __weak_alias 75 __weak_alias(catopen, _catopen) 76 #endif 77 78 static nl_catd load_msgcat __P((const char *)); 79 80 nl_catd 81 _catopen(name, oflag) 82 const char *name; 83 int oflag; 84 { 85 char tmppath[PATH_MAX+1]; 86 const char *nlspath; 87 const char *lang; 88 char *t; 89 const char *s, *u; 90 nl_catd catd; 91 char langbuf[PATH_MAX]; 92 93 if (name == NULL || *name == '\0') 94 return (nl_catd)-1; 95 96 /* absolute or relative path? */ 97 if (strchr(name, '/')) 98 return load_msgcat(name); 99 100 if (issetugid() || (nlspath = getenv("NLSPATH")) == NULL) 101 nlspath = NLS_DEFAULT_PATH; 102 if (oflag == NL_CAT_LOCALE) { 103 lang = setlocale(LC_MESSAGES, NULL); 104 } 105 else { 106 lang = getenv("LANG"); 107 } 108 if (lang == NULL || strchr(lang, '/')) 109 lang = NLS_DEFAULT_LANG; 110 111 lang = _lookup_alias(NLS_ALIAS_DB, lang, langbuf, sizeof(langbuf), 112 _LOOKUP_CASE_SENSITIVE); 113 114 s = nlspath; 115 t = tmppath; 116 do { 117 while (*s && *s != ':') { 118 if (*s == '%') { 119 switch (*(++s)) { 120 case 'L': /* locale */ 121 u = lang; 122 while (*u && t < tmppath + PATH_MAX) 123 *t++ = *u++; 124 break; 125 case 'N': /* name */ 126 u = name; 127 while (*u && t < tmppath + PATH_MAX) 128 *t++ = *u++; 129 break; 130 case 'l': /* lang */ 131 case 't': /* territory */ 132 case 'c': /* codeset */ 133 break; 134 default: 135 if (t < tmppath + PATH_MAX) 136 *t++ = *s; 137 } 138 } else { 139 if (t < tmppath + PATH_MAX) 140 *t++ = *s; 141 } 142 s++; 143 } 144 145 *t = '\0'; 146 catd = load_msgcat(tmppath); 147 if (catd != (nl_catd)-1) 148 return catd; 149 150 if (*s) 151 s++; 152 t = tmppath; 153 } while (*s); 154 155 return (nl_catd)-1; 156 } 157 158 static nl_catd 159 load_msgcat(path) 160 const char *path; 161 { 162 struct stat st; 163 nl_catd catd; 164 void *data; 165 int fd; 166 167 _DIAGASSERT(path != NULL); 168 169 if ((fd = open(path, O_RDONLY)) == -1) 170 return (nl_catd)-1; 171 172 if (fstat(fd, &st) != 0) { 173 close (fd); 174 return (nl_catd)-1; 175 } 176 177 data = mmap(0, (size_t)st.st_size, PROT_READ, MAP_FILE|MAP_SHARED, fd, 178 (off_t)0); 179 close (fd); 180 181 if (data == (void *)-1) { 182 munmap(data, (size_t)st.st_size); 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))) == 0) { 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