1 /* $NetBSD: catopen.c,v 1.9 1996/06/21 06:21:04 jtc 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 REGENTS OR CONTRIBUTORS BE 30 * 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 <limits.h> 42 #include <stdlib.h> 43 #include <string.h> 44 #include <sys/types.h> 45 #include <sys/param.h> 46 #include <sys/stat.h> 47 #include <sys/mman.h> 48 #include <unistd.h> 49 #include <fcntl.h> 50 #include <nl_types.h> 51 52 #define NLS_DEFAULT_PATH "/usr/share/nls/%L/%N.cat:/usr/share/nls/%N/%L" 53 #define NLS_DEFAULT_LANG "C" 54 55 static nl_catd load_msgcat(); 56 57 nl_catd 58 _catopen(name, oflag) 59 const char *name; 60 int oflag; 61 { 62 char tmppath[PATH_MAX]; 63 char *nlspath; 64 char *lang; 65 char *s, *t; 66 const char *u; 67 nl_catd catd; 68 69 if (name == NULL || *name == '\0') 70 return (nl_catd) -1; 71 72 /* absolute or relative path? */ 73 if (strchr (name, '/')) 74 return load_msgcat(name); 75 76 if ((nlspath = getenv ("NLSPATH")) == NULL) { 77 nlspath = NLS_DEFAULT_PATH; 78 } 79 if ((lang = getenv ("LANG")) == NULL) { 80 lang = NLS_DEFAULT_LANG; 81 } 82 83 s = nlspath; 84 t = tmppath; 85 do { 86 while (*s && *s != ':') { 87 if (*s == '%') { 88 switch (*(++s)) { 89 case 'L': /* locale */ 90 u = lang; 91 while (*u && t < tmppath + PATH_MAX) 92 *t++ = *u++; 93 break; 94 case 'N': /* name */ 95 u = name; 96 while (*u && t < tmppath + PATH_MAX) 97 *t++ = *u++; 98 break; 99 case 'l': /* lang */ 100 case 't': /* territory */ 101 case 'c': /* codeset */ 102 break; 103 default: 104 if (t < tmppath + PATH_MAX) 105 *t++ = *s; 106 } 107 } else { 108 if (t < tmppath + PATH_MAX) 109 *t++ = *s; 110 } 111 s++; 112 } 113 114 *t = '\0'; 115 catd = load_msgcat(tmppath); 116 if (catd != (nl_catd) -1) 117 return catd; 118 119 if (*s) 120 s++; 121 t = tmppath; 122 } while (*s); 123 124 return (nl_catd) -1; 125 } 126 127 static nl_catd 128 load_msgcat(path) 129 const char *path; 130 { 131 struct stat st; 132 nl_catd catd; 133 void *data; 134 int fd; 135 136 if ((fd = open (path, O_RDONLY)) == -1) 137 return (nl_catd) -1; 138 139 if (fstat(fd, &st) != 0) { 140 close (fd); 141 return (nl_catd) -1; 142 } 143 144 data = mmap(0, (size_t) st.st_size, PROT_READ, MAP_SHARED, fd, 0); 145 close (fd); 146 147 if (data == (void *) -1) { 148 munmap(data, (size_t) st.st_size); 149 return (nl_catd) -1; 150 } 151 152 if (ntohl(((struct _nls_cat_hdr *) data)->__magic) != _NLS_MAGIC) { 153 munmap(data, (size_t) st.st_size); 154 return (nl_catd) -1; 155 } 156 157 if ((catd = malloc (sizeof (*catd))) == 0) { 158 munmap(data, (size_t) st.st_size); 159 return (nl_catd) -1; 160 } 161 162 catd->__data = data; 163 catd->__size = st.st_size; 164 return catd; 165 } 166