1 /* $NetBSD: catopen.c,v 1.19 2002/02/13 07:48:49 yamt 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 #define _NLS_PRIVATE 40 41 #include "namespace.h" 42 #include <sys/param.h> 43 #include <sys/stat.h> 44 #include <sys/mman.h> 45 46 #include <assert.h> 47 #include <fcntl.h> 48 #include <limits.h> 49 #include <locale.h> 50 #include <nl_types.h> 51 #include <stdlib.h> 52 #include <string.h> 53 #include <unistd.h> 54 55 #include "../locale/aliasname_local.h" 56 #define NLS_ALIAS_DB "/usr/share/nls/nls.alias" 57 58 #define NLS_DEFAULT_PATH "/usr/share/nls/%L/%N.cat:/usr/share/nls/%N/%L" 59 #define NLS_DEFAULT_LANG "C" 60 61 #ifdef __weak_alias 62 __weak_alias(catopen, _catopen) 63 #endif 64 65 static nl_catd load_msgcat __P((const char *)); 66 67 nl_catd 68 _catopen(name, oflag) 69 const char *name; 70 int oflag; 71 { 72 char tmppath[PATH_MAX+1]; 73 char *nlspath; 74 const char *lang; 75 char *s, *t; 76 const char *u; 77 nl_catd catd; 78 char langbuf[PATH_MAX]; 79 80 if (name == NULL || *name == '\0') 81 return (nl_catd)-1; 82 83 /* absolute or relative path? */ 84 if (strchr(name, '/')) 85 return load_msgcat(name); 86 87 if (issetugid() || (nlspath = getenv("NLSPATH")) == NULL) 88 nlspath = NLS_DEFAULT_PATH; 89 if (oflag == NL_CAT_LOCALE) { 90 lang = setlocale(LC_MESSAGES, NULL); 91 } 92 else { 93 lang = getenv("LANG"); 94 } 95 if (lang == NULL || strchr(lang, '/')) 96 lang = NLS_DEFAULT_LANG; 97 98 lang = __unaliasname(NLS_ALIAS_DB, lang, langbuf, sizeof(langbuf)); 99 100 s = nlspath; 101 t = tmppath; 102 do { 103 while (*s && *s != ':') { 104 if (*s == '%') { 105 switch (*(++s)) { 106 case 'L': /* locale */ 107 u = lang; 108 while (*u && t < tmppath + PATH_MAX) 109 *t++ = *u++; 110 break; 111 case 'N': /* name */ 112 u = name; 113 while (*u && t < tmppath + PATH_MAX) 114 *t++ = *u++; 115 break; 116 case 'l': /* lang */ 117 case 't': /* territory */ 118 case 'c': /* codeset */ 119 break; 120 default: 121 if (t < tmppath + PATH_MAX) 122 *t++ = *s; 123 } 124 } else { 125 if (t < tmppath + PATH_MAX) 126 *t++ = *s; 127 } 128 s++; 129 } 130 131 *t = '\0'; 132 catd = load_msgcat(tmppath); 133 if (catd != (nl_catd)-1) 134 return catd; 135 136 if (*s) 137 s++; 138 t = tmppath; 139 } while (*s); 140 141 return (nl_catd)-1; 142 } 143 144 static nl_catd 145 load_msgcat(path) 146 const char *path; 147 { 148 struct stat st; 149 nl_catd catd; 150 void *data; 151 int fd; 152 153 _DIAGASSERT(path != NULL); 154 155 if ((fd = open(path, O_RDONLY)) == -1) 156 return (nl_catd)-1; 157 158 if (fstat(fd, &st) != 0) { 159 close (fd); 160 return (nl_catd)-1; 161 } 162 163 data = mmap(0, (size_t)st.st_size, PROT_READ, MAP_FILE|MAP_SHARED, fd, 164 (off_t)0); 165 close (fd); 166 167 if (data == (void *)-1) { 168 munmap(data, (size_t)st.st_size); 169 return (nl_catd)-1; 170 } 171 172 if (ntohl((u_int32_t)((struct _nls_cat_hdr *)data)->__magic) != 173 _NLS_MAGIC) { 174 munmap(data, (size_t)st.st_size); 175 return (nl_catd)-1; 176 } 177 178 if ((catd = malloc(sizeof (*catd))) == 0) { 179 munmap(data, (size_t)st.st_size); 180 return (nl_catd)-1; 181 } 182 183 catd->__data = data; 184 catd->__size = (int)st.st_size; 185 return catd; 186 } 187