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 * $Id: timelocal.c,v 1.1 1997/08/09 15:43:57 joerg Exp $ 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 <stdlib.h> 35 #include <string.h> 36 #include "setlocale.h" 37 #include "timelocal.h" 38 39 struct lc_time_T _time_localebuf; 40 int _time_using_locale; 41 42 const struct lc_time_T _C_time_locale = { 43 { 44 "Jan", "Feb", "Mar", "Apr", "May", "Jun", 45 "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" 46 }, { 47 "January", "February", "March", "April", "May", "June", 48 "July", "August", "September", "October", "November", "December" 49 }, { 50 "Sun", "Mon", "Tue", "Wed", 51 "Thu", "Fri", "Sat" 52 }, { 53 "Sunday", "Monday", "Tuesday", "Wednesday", 54 "Thursday", "Friday", "Saturday" 55 }, 56 57 /* X_fmt */ 58 "%H:%M:%S", 59 60 /* 61 ** x_fmt 62 ** Since the C language standard calls for 63 ** "date, using locale's date format," anything goes. 64 ** Using just numbers (as here) makes Quakers happier; 65 ** it's also compatible with SVR4. 66 */ 67 "%m/%d/%y", 68 69 /* 70 ** c_fmt (ctime-compatible) 71 ** Note that 72 ** "%a %b %d %H:%M:%S %Y" 73 ** is used by Solaris 2.3. 74 */ 75 "%a %b %e %X %Y", 76 77 /* am */ 78 "AM", 79 80 /* pm */ 81 "PM", 82 83 /* date_fmt */ 84 "%a %b %e %X %Z %Y" 85 }; 86 87 88 int 89 __time_load_locale(const char *name) 90 { 91 static char * locale_buf; 92 static char locale_buf_C[] = "C"; 93 94 int fd; 95 char * lbuf; 96 char * p; 97 const char ** ap; 98 const char * plim; 99 char filename[PATH_MAX]; 100 struct stat st; 101 size_t namesize; 102 size_t bufsize; 103 int save_using_locale; 104 105 save_using_locale = _time_using_locale; 106 _time_using_locale = 0; 107 108 if (name == NULL) 109 goto no_locale; 110 111 if (!strcmp(name, "C") || !strcmp(name, "POSIX")) 112 return 0; 113 114 /* 115 ** If the locale name is the same as our cache, use the cache. 116 */ 117 lbuf = locale_buf; 118 if (lbuf != NULL && strcmp(name, lbuf) == 0) { 119 p = lbuf; 120 for (ap = (const char **) &_time_localebuf; 121 ap < (const char **) (&_time_localebuf + 1); 122 ++ap) 123 *ap = p += strlen(p) + 1; 124 _time_using_locale = 1; 125 return 0; 126 } 127 /* 128 ** Slurp the locale file into the cache. 129 */ 130 namesize = strlen(name) + 1; 131 132 if (!_PathLocale) 133 goto no_locale; 134 /* Range checking not needed, 'name' size is limited */ 135 strcpy(filename, _PathLocale); 136 strcat(filename, "/"); 137 strcat(filename, name); 138 strcat(filename, "/LC_TIME"); 139 fd = open(filename, O_RDONLY); 140 if (fd < 0) 141 goto no_locale; 142 if (fstat(fd, &st) != 0) 143 goto bad_locale; 144 if (st.st_size <= 0) 145 goto bad_locale; 146 bufsize = namesize + st.st_size; 147 locale_buf = NULL; 148 lbuf = (lbuf == NULL || lbuf == locale_buf_C) ? 149 malloc(bufsize) : reallocf(lbuf, bufsize); 150 if (lbuf == NULL) 151 goto bad_locale; 152 (void) strcpy(lbuf, name); 153 p = lbuf + namesize; 154 plim = p + st.st_size; 155 if (read(fd, p, (size_t) st.st_size) != st.st_size) 156 goto bad_lbuf; 157 if (close(fd) != 0) 158 goto bad_lbuf; 159 /* 160 ** Parse the locale file into localebuf. 161 */ 162 if (plim[-1] != '\n') 163 goto bad_lbuf; 164 for (ap = (const char **) &_time_localebuf; 165 ap < (const char **) (&_time_localebuf + 1); 166 ++ap) { 167 if (p == plim) 168 goto reset_locale; 169 *ap = p; 170 while (*p != '\n') 171 ++p; 172 *p++ = '\0'; 173 } 174 /* 175 ** Record the successful parse in the cache. 176 */ 177 locale_buf = lbuf; 178 179 _time_using_locale = 1; 180 return 0; 181 182 reset_locale: 183 /* 184 * XXX - This may not be the correct thing to do in this case. 185 * setlocale() assumes that we left the old locale alone. 186 */ 187 locale_buf = locale_buf_C; 188 _time_localebuf = _C_time_locale; 189 save_using_locale = 0; 190 bad_lbuf: 191 free(lbuf); 192 bad_locale: 193 (void) close(fd); 194 no_locale: 195 _time_using_locale = save_using_locale; 196 return -1; 197 } 198