1 /* 2 * Copyright (c) 2000, 2001 Alexey Zelkin <phantom@FreeBSD.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD$ 27 */ 28 29 #include "namespace.h" 30 #include <sys/types.h> 31 #include <sys/stat.h> 32 #include <sys/syslimits.h> 33 #include <fcntl.h> 34 #include <stdlib.h> 35 #include <string.h> 36 #include <unistd.h> 37 #include "un-namespace.h" 38 39 #include "setlocale.h" 40 #include "ldpart.h" 41 42 static int split_lines(char *, const char *); 43 static void set_from_buf(const char *, int, const char **); 44 45 int 46 __part_load_locale(const char *name, 47 int* using_locale, 48 char *locale_buf, 49 const char *category_name, 50 int locale_buf_size_max, 51 int locale_buf_size_min, 52 const char **dst_localebuf) { 53 54 static char locale_buf_C[] = "C"; 55 static int num_lines; 56 57 int fd; 58 char * lbuf; 59 char * p; 60 const char * plim; 61 char filename[PATH_MAX]; 62 struct stat st; 63 size_t namesize; 64 size_t bufsize; 65 int save_using_locale; 66 67 save_using_locale = *using_locale; 68 *using_locale = 0; 69 70 if (name == NULL) 71 goto no_locale; 72 73 if (!strcmp(name, "C") || !strcmp(name, "POSIX")) 74 return 0; 75 76 /* 77 * If the locale name is the same as our cache, use the cache. 78 */ 79 lbuf = locale_buf; 80 if (lbuf != NULL && strcmp(name, lbuf) == 0) { 81 set_from_buf(lbuf, num_lines, dst_localebuf); 82 *using_locale = 1; 83 return 0; 84 } 85 /* 86 * Slurp the locale file into the cache. 87 */ 88 namesize = strlen(name) + 1; 89 90 if (!_PathLocale) 91 goto no_locale; 92 /* Range checking not needed, 'name' size is limited */ 93 strcpy(filename, _PathLocale); 94 strcat(filename, "/"); 95 strcat(filename, name); 96 strcat(filename, "/"); 97 strcat(filename, category_name); 98 fd = _open(filename, O_RDONLY); 99 if (fd < 0) 100 goto no_locale; 101 if (_fstat(fd, &st) != 0) 102 goto bad_locale; 103 if (st.st_size <= 0) 104 goto bad_locale; 105 bufsize = namesize + st.st_size; 106 locale_buf = NULL; 107 lbuf = (lbuf == NULL || lbuf == locale_buf_C) ? 108 malloc(bufsize) : reallocf(lbuf, bufsize); 109 if (lbuf == NULL) 110 goto bad_locale; 111 (void) strcpy(lbuf, name); 112 p = lbuf + namesize; 113 plim = p + st.st_size; 114 if (_read(fd, p, (size_t) st.st_size) != st.st_size) 115 goto bad_lbuf; 116 if (_close(fd) != 0) 117 goto bad_lbuf; 118 /* 119 * Parse the locale file into localebuf. 120 */ 121 if (plim[-1] != '\n') 122 goto bad_lbuf; 123 num_lines = split_lines(p, plim); 124 if (num_lines >= locale_buf_size_max) 125 num_lines = locale_buf_size_max; 126 else if (num_lines >= locale_buf_size_min) 127 num_lines = locale_buf_size_min; 128 else 129 goto reset_locale; 130 set_from_buf(lbuf, num_lines, dst_localebuf); 131 /* 132 ** Record the successful parse in the cache. 133 */ 134 locale_buf = lbuf; 135 136 *using_locale = 1; 137 return 0; 138 139 reset_locale: 140 locale_buf = locale_buf_C; 141 save_using_locale = 0; 142 bad_lbuf: 143 free(lbuf); 144 bad_locale: 145 (void)_close(fd); 146 no_locale: 147 *using_locale = save_using_locale; 148 return -1; 149 } 150 151 static int 152 split_lines(char *p, const char *plim) 153 { 154 int i; 155 156 for (i = 0; p < plim; i++) { 157 p = strchr(p, '\n'); 158 *p++ = '\0'; 159 } 160 return i; 161 } 162 163 static void 164 set_from_buf(const char *p, int num_lines, const char **dst_localebuf) 165 { 166 const char **ap; 167 int i; 168 169 for (ap = dst_localebuf, i = 0; i < num_lines; ++ap, ++i) 170 *ap = p += strlen(p) + 1; 171 } 172 173