1 /*- 2 * Copyright (c) 1996 The NetBSD Foundation, Inc. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to The NetBSD Foundation 6 * by J.T. Conklin. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the NetBSD 19 * Foundation, Inc. and its contributors. 20 * 4. Neither the name of The NetBSD Foundation nor the names of its 21 * contributors may be used to endorse or promote products derived 22 * from this software without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 25 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 26 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 27 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE 28 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 29 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 30 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 31 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 32 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 33 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 34 * POSSIBILITY OF SUCH DAMAGE. 35 */ 36 37 #if defined(LIBC_SCCS) && !defined(lint) 38 static char rcsid[] = "$OpenBSD: catopen.c,v 1.9 2001/05/11 15:30:14 art Exp $"; 39 #endif /* LIBC_SCCS and not lint */ 40 41 #define _NLS_PRIVATE 42 43 #include <limits.h> 44 #include <stdlib.h> 45 #include <string.h> 46 #include <sys/types.h> 47 #include <sys/param.h> 48 #include <sys/stat.h> 49 #include <sys/mman.h> 50 #include <unistd.h> 51 #include <fcntl.h> 52 #include <nl_types.h> 53 54 #define NLS_DEFAULT_PATH "/usr/share/nls/%L/%N.cat:/usr/share/nls/%N/%L" 55 #define NLS_DEFAULT_LANG "C" 56 57 static nl_catd load_msgcat __P((const char *)); 58 59 /* ARGSUSED */ 60 nl_catd 61 _catopen(name, oflag) 62 const char *name; 63 int oflag; 64 { 65 char tmppath[PATH_MAX]; 66 char *nlspath; 67 char *lang; 68 char *s, *t; 69 const char *u; 70 nl_catd catd; 71 72 if (name == NULL || *name == '\0') 73 return (nl_catd) -1; 74 75 /* absolute or relative path? */ 76 if (strchr(name, '/')) 77 return load_msgcat(name); 78 79 if (issetugid() != 0 || (nlspath = getenv("NLSPATH")) == NULL) 80 nlspath = NLS_DEFAULT_PATH; 81 if ((lang = getenv("LANG")) == NULL) 82 lang = NLS_DEFAULT_LANG; 83 84 s = nlspath; 85 t = tmppath; 86 do { 87 while (*s && *s != ':') { 88 if (*s == '%') { 89 switch (*(++s)) { 90 case 'L': /* locale */ 91 u = lang; 92 while (*u && t < tmppath + PATH_MAX-1) 93 *t++ = *u++; 94 break; 95 case 'N': /* name */ 96 u = name; 97 while (*u && t < tmppath + PATH_MAX-1) 98 *t++ = *u++; 99 break; 100 case 'l': /* lang */ 101 case 't': /* territory */ 102 case 'c': /* codeset */ 103 break; 104 default: 105 if (t < tmppath + PATH_MAX-1) 106 *t++ = *s; 107 } 108 } else { 109 if (t < tmppath + PATH_MAX-1) 110 *t++ = *s; 111 } 112 s++; 113 } 114 115 *t = '\0'; 116 catd = load_msgcat(tmppath); 117 if (catd != (nl_catd) -1) 118 return catd; 119 120 if (*s) 121 s++; 122 t = tmppath; 123 } while (*s); 124 125 return (nl_catd) -1; 126 } 127 128 static nl_catd 129 load_msgcat(path) 130 const char *path; 131 { 132 struct stat st; 133 nl_catd catd; 134 void *data; 135 int fd; 136 137 if ((fd = open(path, O_RDONLY)) == -1) 138 return (nl_catd) -1; 139 140 if (fstat(fd, &st) != 0) { 141 close (fd); 142 return (nl_catd) -1; 143 } 144 145 data = mmap(0, (size_t) st.st_size, PROT_READ, MAP_SHARED, fd, (off_t)0); 146 close (fd); 147 148 if (data == MAP_FAILED) { 149 munmap(data, (size_t) st.st_size); 150 return (nl_catd) -1; 151 } 152 153 if (ntohl(((struct _nls_cat_hdr *) data)->__magic) != _NLS_MAGIC) { 154 munmap(data, (size_t) st.st_size); 155 return (nl_catd) -1; 156 } 157 158 if ((catd = malloc(sizeof (*catd))) == 0) { 159 munmap(data, (size_t) st.st_size); 160 return (nl_catd) -1; 161 } 162 163 catd->__data = data; 164 catd->__size = st.st_size; 165 return catd; 166 } 167