1 /*- 2 * Copyright (c) 1997 FreeBSD Inc. 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 <sys/types.h> 30 #include <sys/stat.h> 31 #include <sys/syslimits.h> 32 #include <fcntl.h> 33 #include <locale.h> 34 #include <stddef.h> 35 #include <stdlib.h> 36 #include <string.h> 37 #include "setlocale.h" 38 #include "timelocal.h" 39 40 static int split_lines(char *, const char *); 41 static void set_from_buf(const char *, int); 42 43 struct lc_time_T _time_localebuf; 44 int _time_using_locale; 45 46 #define LCTIME_SIZE_FULL (sizeof(struct lc_time_T) / sizeof(char *)) 47 #define LCTIME_SIZE_1 \ 48 (offsetof(struct lc_time_T, alt_month[0]) / sizeof(char *)) 49 #define LCTIME_SIZE_2 \ 50 (offsetof(struct lc_time_T, Ef_fmt) / sizeof(char *)) 51 52 const struct lc_time_T _C_time_locale = { 53 { 54 "Jan", "Feb", "Mar", "Apr", "May", "Jun", 55 "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" 56 }, { 57 "January", "February", "March", "April", "May", "June", 58 "July", "August", "September", "October", "November", "December" 59 }, { 60 "Sun", "Mon", "Tue", "Wed", 61 "Thu", "Fri", "Sat" 62 }, { 63 "Sunday", "Monday", "Tuesday", "Wednesday", 64 "Thursday", "Friday", "Saturday" 65 }, 66 67 /* X_fmt */ 68 "%H:%M:%S", 69 70 /* 71 ** x_fmt 72 ** Since the C language standard calls for 73 ** "date, using locale's date format," anything goes. 74 ** Using just numbers (as here) makes Quakers happier; 75 ** it's also compatible with SVR4. 76 */ 77 "%m/%d/%y", 78 79 /* 80 ** c_fmt (ctime-compatible) 81 ** Not used, just compatibility placeholder. 82 */ 83 NULL, 84 85 /* am */ 86 "AM", 87 88 /* pm */ 89 "PM", 90 91 /* date_fmt */ 92 "%a %Ef %X %Z %Y", 93 94 { 95 "January", "February", "March", "April", "May", "June", 96 "July", "August", "September", "October", "November", "December" 97 }, 98 99 /* Ef_fmt 100 ** To determine short months / day order 101 */ 102 "%b %e", 103 104 /* EF_fmt 105 ** To determine long months / day order 106 */ 107 "%B %e" 108 }; 109 110 111 int 112 __time_load_locale(const char *name) 113 { 114 static char * locale_buf; 115 static char locale_buf_C[] = "C"; 116 static int num_lines; 117 118 int fd; 119 char * lbuf; 120 char * p; 121 const char * plim; 122 char filename[PATH_MAX]; 123 struct stat st; 124 size_t namesize; 125 size_t bufsize; 126 int save_using_locale; 127 128 save_using_locale = _time_using_locale; 129 _time_using_locale = 0; 130 131 if (name == NULL) 132 goto no_locale; 133 134 if (!strcmp(name, "C") || !strcmp(name, "POSIX")) 135 return 0; 136 137 /* 138 ** If the locale name is the same as our cache, use the cache. 139 */ 140 lbuf = locale_buf; 141 if (lbuf != NULL && strcmp(name, lbuf) == 0) { 142 set_from_buf(lbuf, num_lines); 143 _time_using_locale = 1; 144 return 0; 145 } 146 /* 147 ** Slurp the locale file into the cache. 148 */ 149 namesize = strlen(name) + 1; 150 151 if (!_PathLocale) 152 goto no_locale; 153 /* Range checking not needed, 'name' size is limited */ 154 strcpy(filename, _PathLocale); 155 strcat(filename, "/"); 156 strcat(filename, name); 157 strcat(filename, "/LC_TIME"); 158 fd = _open(filename, O_RDONLY); 159 if (fd < 0) 160 goto no_locale; 161 if (fstat(fd, &st) != 0) 162 goto bad_locale; 163 if (st.st_size <= 0) 164 goto bad_locale; 165 bufsize = namesize + st.st_size; 166 locale_buf = NULL; 167 lbuf = (lbuf == NULL || lbuf == locale_buf_C) ? 168 malloc(bufsize) : reallocf(lbuf, bufsize); 169 if (lbuf == NULL) 170 goto bad_locale; 171 (void) strcpy(lbuf, name); 172 p = lbuf + namesize; 173 plim = p + st.st_size; 174 if (_read(fd, p, (size_t) st.st_size) != st.st_size) 175 goto bad_lbuf; 176 if (_close(fd) != 0) 177 goto bad_lbuf; 178 /* 179 ** Parse the locale file into localebuf. 180 */ 181 if (plim[-1] != '\n') 182 goto bad_lbuf; 183 num_lines = split_lines(p, plim); 184 if (num_lines >= LCTIME_SIZE_FULL) 185 num_lines = LCTIME_SIZE_FULL; 186 else if (num_lines >= LCTIME_SIZE_2) 187 num_lines = LCTIME_SIZE_2; 188 else if (num_lines >= LCTIME_SIZE_1) 189 num_lines = LCTIME_SIZE_1; 190 else 191 goto reset_locale; 192 set_from_buf(lbuf, num_lines); 193 /* 194 ** Record the successful parse in the cache. 195 */ 196 locale_buf = lbuf; 197 198 _time_using_locale = 1; 199 return 0; 200 201 reset_locale: 202 /* 203 * XXX - This may not be the correct thing to do in this case. 204 * setlocale() assumes that we left the old locale alone. 205 */ 206 locale_buf = locale_buf_C; 207 _time_localebuf = _C_time_locale; 208 save_using_locale = 0; 209 bad_lbuf: 210 free(lbuf); 211 bad_locale: 212 (void)_close(fd); 213 no_locale: 214 _time_using_locale = save_using_locale; 215 return -1; 216 } 217 218 static int 219 split_lines(char *p, const char *plim) 220 { 221 int i; 222 223 for (i = 0; p < plim; i++) { 224 p = strchr(p, '\n'); 225 *p++ = '\0'; 226 } 227 return i; 228 } 229 230 static void 231 set_from_buf(const char *p, int num_lines) 232 { 233 const char **ap; 234 int i; 235 236 for (ap = (const char **) &_time_localebuf, i = 0; 237 i < num_lines; ++ap, ++i) 238 *ap = p += strlen(p) + 1; 239 if (num_lines >= LCTIME_SIZE_2) 240 return; 241 for (i = 0; i < 12; i++) 242 _time_localebuf.alt_month[i] = _time_localebuf.month[i]; 243 } 244