1 /*- 2 * Copyright (c) 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Paul Borman at Krystal Technologies. 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 University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 */ 36 37 #include <sys/cdefs.h> 38 __FBSDID("$FreeBSD$"); 39 40 #include <rune.h> 41 #include <errno.h> 42 #include <limits.h> 43 #include <string.h> 44 #include <stdio.h> 45 #include <stdlib.h> 46 #include <unistd.h> 47 #include "setlocale.h" 48 49 extern int _none_init(_RuneLocale *); 50 extern int _UTF2_init(_RuneLocale *); 51 extern int _EUC_init(_RuneLocale *); 52 extern int _BIG5_init(_RuneLocale *); 53 extern int _MSKanji_init(_RuneLocale *); 54 extern _RuneLocale *_Read_RuneMagi(FILE *); 55 56 int 57 setrunelocale(char *encoding) 58 { 59 FILE *fp; 60 char name[PATH_MAX]; 61 _RuneLocale *rl; 62 int saverr, ret; 63 static char ctype_encoding[ENCODING_LEN + 1]; 64 static _RuneLocale *CachedRuneLocale; 65 static int Cached__mb_cur_max; 66 67 if (!encoding || !*encoding || strlen(encoding) > ENCODING_LEN || 68 (encoding[0] == '.' && 69 (encoding[1] == '\0' || 70 (encoding[1] == '.' && encoding[2] == '\0'))) || 71 strchr(encoding, '/') != NULL) 72 return (EINVAL); 73 74 /* 75 * The "C" and "POSIX" locale are always here. 76 */ 77 if (strcmp(encoding, "C") == 0 || strcmp(encoding, "POSIX") == 0) { 78 _CurrentRuneLocale = &_DefaultRuneLocale; 79 __mb_cur_max = 1; 80 return (0); 81 } 82 83 /* 84 * If the locale name is the same as our cache, use the cache. 85 */ 86 if (CachedRuneLocale != NULL && 87 strcmp(encoding, ctype_encoding) == 0) { 88 _CurrentRuneLocale = CachedRuneLocale; 89 __mb_cur_max = Cached__mb_cur_max; 90 return (0); 91 } 92 93 /* 94 * Slurp the locale file into the cache. 95 */ 96 if (_PathLocale == NULL) { 97 char *p = getenv("PATH_LOCALE"); 98 99 if (p != NULL 100 #ifndef __NETBSD_SYSCALLS 101 && !issetugid() 102 #endif 103 ) { 104 if (strlen(p) + 1/*"/"*/ + ENCODING_LEN + 105 1/*"/"*/ + CATEGORY_LEN >= PATH_MAX) 106 return (ENAMETOOLONG); 107 _PathLocale = strdup(p); 108 if (_PathLocale == NULL) 109 return (errno == 0 ? ENOMEM : errno); 110 } else 111 _PathLocale = _PATH_LOCALE; 112 } 113 /* Range checking not needed, encoding length already checked above */ 114 (void) strcpy(name, _PathLocale); 115 (void) strcat(name, "/"); 116 (void) strcat(name, encoding); 117 (void) strcat(name, "/LC_CTYPE"); 118 119 if ((fp = fopen(name, "r")) == NULL) 120 return (errno == 0 ? ENOENT : errno); 121 122 if ((rl = _Read_RuneMagi(fp)) == NULL) { 123 saverr = (errno == 0 ? EFTYPE : errno); 124 (void)fclose(fp); 125 return (saverr); 126 } 127 (void)fclose(fp); 128 129 if (strcmp(rl->encoding, "NONE") == 0) 130 ret = _none_init(rl); 131 else if (strcmp(rl->encoding, "UTF2") == 0) 132 ret = _UTF2_init(rl); 133 else if (strcmp(rl->encoding, "EUC") == 0) 134 ret = _EUC_init(rl); 135 else if (strcmp(rl->encoding, "BIG5") == 0) 136 ret = _BIG5_init(rl); 137 else if (strcmp(rl->encoding, "MSKanji") == 0) 138 ret = _MSKanji_init(rl); 139 else 140 ret = EFTYPE; 141 if (ret == 0) { 142 if (CachedRuneLocale != NULL) { 143 /* See euc.c */ 144 if (strcmp(CachedRuneLocale->encoding, "EUC") == 0) 145 free(CachedRuneLocale->variable); 146 free(CachedRuneLocale); 147 } 148 CachedRuneLocale = _CurrentRuneLocale; 149 Cached__mb_cur_max = __mb_cur_max; 150 (void)strcpy(ctype_encoding, encoding); 151 } else 152 free(rl); 153 154 return (ret); 155 } 156 157