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 ** Note that 82 ** "%a %b %d %H:%M:%S %Y" 83 ** is used by Solaris 2.3. 84 */ 85 "%a %Ef %X %Y", 86 87 /* am */ 88 "AM", 89 90 /* pm */ 91 "PM", 92 93 /* date_fmt */ 94 "%a %Ef %X %Z %Y", 95 96 { 97 "January", "February", "March", "April", "May", "June", 98 "July", "August", "September", "October", "November", "December" 99 }, 100 101 /* Ef_fmt 102 ** To determine short months / day order 103 */ 104 "%b %e", 105 106 /* EF_fmt 107 ** To determine long months / day order 108 */ 109 "%B %e" 110 }; 111 112 113 int 114 __time_load_locale(const char *name) 115 { 116 static char * locale_buf; 117 static char locale_buf_C[] = "C"; 118 static int num_lines; 119 120 int fd; 121 char * lbuf; 122 char * p; 123 const char * plim; 124 char filename[PATH_MAX]; 125 struct stat st; 126 size_t namesize; 127 size_t bufsize; 128 int save_using_locale; 129 130 save_using_locale = _time_using_locale; 131 _time_using_locale = 0; 132 133 if (name == NULL) 134 goto no_locale; 135 136 if (!strcmp(name, "C") || !strcmp(name, "POSIX")) 137 return 0; 138 139 /* 140 ** If the locale name is the same as our cache, use the cache. 141 */ 142 lbuf = locale_buf; 143 if (lbuf != NULL && strcmp(name, lbuf) == 0) { 144 set_from_buf(lbuf, num_lines); 145 _time_using_locale = 1; 146 return 0; 147 } 148 /* 149 ** Slurp the locale file into the cache. 150 */ 151 namesize = strlen(name) + 1; 152 153 if (!_PathLocale) 154 goto no_locale; 155 /* Range checking not needed, 'name' size is limited */ 156 strcpy(filename, _PathLocale); 157 strcat(filename, "/"); 158 strcat(filename, name); 159 strcat(filename, "/LC_TIME"); 160 fd = _open(filename, O_RDONLY); 161 if (fd < 0) 162 goto no_locale; 163 if (fstat(fd, &st) != 0) 164 goto bad_locale; 165 if (st.st_size <= 0) 166 goto bad_locale; 167 bufsize = namesize + st.st_size; 168 locale_buf = NULL; 169 lbuf = (lbuf == NULL || lbuf == locale_buf_C) ? 170 malloc(bufsize) : reallocf(lbuf, bufsize); 171 if (lbuf == NULL) 172 goto bad_locale; 173 (void) strcpy(lbuf, name); 174 p = lbuf + namesize; 175 plim = p + st.st_size; 176 if (_read(fd, p, (size_t) st.st_size) != st.st_size) 177 goto bad_lbuf; 178 if (_close(fd) != 0) 179 goto bad_lbuf; 180 /* 181 ** Parse the locale file into localebuf. 182 */ 183 if (plim[-1] != '\n') 184 goto bad_lbuf; 185 num_lines = split_lines(p, plim); 186 if (num_lines >= LCTIME_SIZE_FULL) 187 num_lines = LCTIME_SIZE_FULL; 188 else if (num_lines >= LCTIME_SIZE_2) 189 num_lines = LCTIME_SIZE_2; 190 else if (num_lines >= LCTIME_SIZE_1) 191 num_lines = LCTIME_SIZE_1; 192 else 193 goto reset_locale; 194 set_from_buf(lbuf, num_lines); 195 /* 196 ** Record the successful parse in the cache. 197 */ 198 locale_buf = lbuf; 199 200 _time_using_locale = 1; 201 return 0; 202 203 reset_locale: 204 /* 205 * XXX - This may not be the correct thing to do in this case. 206 * setlocale() assumes that we left the old locale alone. 207 */ 208 locale_buf = locale_buf_C; 209 _time_localebuf = _C_time_locale; 210 save_using_locale = 0; 211 bad_lbuf: 212 free(lbuf); 213 bad_locale: 214 (void)_close(fd); 215 no_locale: 216 _time_using_locale = save_using_locale; 217 return -1; 218 } 219 220 static int 221 split_lines(char *p, const char *plim) 222 { 223 int i; 224 225 for (i = 0; p < plim; i++) { 226 p = strchr(p, '\n'); 227 *p++ = '\0'; 228 } 229 return i; 230 } 231 232 static void 233 set_from_buf(const char *p, int num_lines) 234 { 235 const char **ap; 236 int i; 237 238 for (ap = (const char **) &_time_localebuf, i = 0; 239 i < num_lines; ++ap, ++i) 240 *ap = p += strlen(p) + 1; 241 if (num_lines == LCTIME_SIZE_FULL) 242 return; 243 for (i = 0; i < 12; i++) 244 _time_localebuf.alt_month[i] = _time_localebuf.month[i]; 245 } 246