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 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 #include "namespace.h" 31 #include <sys/types.h> 32 #include <sys/stat.h> 33 #include <sys/syslimits.h> 34 #include <fcntl.h> 35 #include <stdlib.h> 36 #include <string.h> 37 #include <unistd.h> 38 #include "un-namespace.h" 39 40 #include "setlocale.h" 41 #include "ldpart.h" 42 43 static int split_lines(char *, const char *); 44 static void set_from_buf(const char *, int, const char **); 45 46 int 47 __part_load_locale(const char *name, 48 int *using_locale, 49 char *locale_buf, 50 const char *category_filename, 51 int locale_buf_size_max, 52 int locale_buf_size_min, 53 const char **dst_localebuf) { 54 55 static char locale_buf_C[] = "C"; 56 static int num_lines; 57 58 int fd; 59 char *lbuf; 60 char *p; 61 const char *plim; 62 char filename[PATH_MAX]; 63 struct stat st; 64 size_t namesize; 65 size_t bufsize; 66 int save_using_locale; 67 68 save_using_locale = *using_locale; 69 *using_locale = 0; 70 71 if (name == NULL) 72 goto no_locale; 73 74 if (!strcmp(name, "C") || !strcmp(name, "POSIX")) 75 return 0; 76 77 /* 78 * If the locale name is the same as our cache, use the cache. 79 */ 80 lbuf = locale_buf; 81 if (lbuf != NULL && strcmp(name, lbuf) == 0) { 82 set_from_buf(lbuf, num_lines, dst_localebuf); 83 *using_locale = 1; 84 return 0; 85 } 86 87 /* 88 * Slurp the locale file into the cache. 89 */ 90 namesize = strlen(name) + 1; 91 92 if (!_PathLocale) 93 goto no_locale; 94 /* Range checking not needed, 'name' size is limited */ 95 strcpy(filename, _PathLocale); 96 strcat(filename, "/"); 97 strcat(filename, name); 98 strcat(filename, "/"); 99 strcat(filename, category_filename); 100 fd = _open(filename, O_RDONLY); 101 if (fd < 0) 102 goto no_locale; 103 if (_fstat(fd, &st) != 0) 104 goto bad_locale; 105 if (st.st_size <= 0) 106 goto bad_locale; 107 bufsize = namesize + st.st_size; 108 locale_buf = NULL; 109 lbuf = (lbuf == NULL || lbuf == locale_buf_C) ? 110 malloc(bufsize) : reallocf(lbuf, bufsize); 111 if (lbuf == NULL) 112 goto bad_locale; 113 (void) strcpy(lbuf, name); 114 p = lbuf + namesize; 115 plim = p + st.st_size; 116 if (_read(fd, p, (size_t) st.st_size) != st.st_size) 117 goto bad_lbuf; 118 if (_close(fd) != 0) 119 goto bad_lbuf; 120 /* 121 * Parse the locale file into localebuf. 122 */ 123 if (plim[-1] != '\n') 124 goto bad_lbuf; 125 num_lines = split_lines(p, plim); 126 if (num_lines >= locale_buf_size_max) 127 num_lines = locale_buf_size_max; 128 else if (num_lines >= locale_buf_size_min) 129 num_lines = locale_buf_size_min; 130 else 131 goto reset_locale; 132 set_from_buf(lbuf, num_lines, dst_localebuf); 133 /* 134 * Record the successful parse in the cache. 135 */ 136 locale_buf = lbuf; 137 138 *using_locale = 1; 139 return 0; 140 141 reset_locale: 142 locale_buf = locale_buf_C; 143 save_using_locale = 0; 144 bad_lbuf: 145 free(lbuf); 146 bad_locale: 147 (void)_close(fd); 148 no_locale: 149 *using_locale = save_using_locale; 150 return -1; 151 } 152 153 static int 154 split_lines(char *p, const char *plim) { 155 156 int i; 157 158 for (i = 0; p < plim; i++) { 159 p = strchr(p, '\n'); 160 *p++ = '\0'; 161 } 162 return i; 163 } 164 165 static void 166 set_from_buf(const char *p, int num_lines, const char **dst_localebuf) { 167 168 const char **ap; 169 int i; 170 171 for (ap = dst_localebuf, i = 0; i < num_lines; ++ap, ++i) 172 *ap = p += strlen(p) + 1; 173 } 174 175