strftime.c revision 1.21
1 /* $NetBSD: strftime.c,v 1.21 2010/12/16 18:38:07 christos Exp $ */ 2 3 #include <sys/cdefs.h> 4 #if defined(LIBC_SCCS) && !defined(lint) 5 #if 0 6 static char elsieid[] = "@(#)strftime.c 7.64"; 7 static char elsieid[] = "@(#)strftime.c 8.3"; 8 #else 9 __RCSID("$NetBSD: strftime.c,v 1.21 2010/12/16 18:38:07 christos Exp $"); 10 #endif 11 #endif /* LIBC_SCCS and not lint */ 12 13 #include "namespace.h" 14 15 /* 16 ** Based on the UCB version with the ID appearing below. 17 ** This is ANSIish only when "multibyte character == plain character". 18 */ 19 20 #include "private.h" 21 22 /* 23 ** We don't use these extensions in strftime operation even when 24 ** supported by the local tzcode configuration. A strictly 25 ** conforming C application may leave them in undefined state. 26 */ 27 28 #ifdef _LIBC 29 #undef TM_ZONE 30 #undef TM_GMTOFF 31 #endif 32 33 /* 34 ** Copyright (c) 1989, 1993 35 ** The Regents of the University of California. All rights reserved. 36 ** 37 ** Redistribution and use in source and binary forms, with or without 38 ** modification, are permitted provided that the following conditions 39 ** are met: 40 ** 1. Redistributions of source code must retain the above copyright 41 ** notice, this list of conditions and the following disclaimer. 42 ** 2. Redistributions in binary form must reproduce the above copyright 43 ** notice, this list of conditions and the following disclaimer in the 44 ** documentation and/or other materials provided with the distribution. 45 ** 3. All advertising materials mentioning features or use of this software 46 ** must display the following acknowledgement: 47 ** This product includes software developed by the University of 48 ** California, Berkeley and its contributors. 49 ** 4. Neither the name of the University nor the names of its contributors 50 ** may be used to endorse or promote products derived from this software 51 ** without specific prior written permission. 52 ** 53 ** THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 54 ** ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 55 ** IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 56 ** ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 57 ** FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 58 ** DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 59 ** OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 60 ** HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 61 ** LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 62 ** OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 63 ** SUCH DAMAGE. 64 */ 65 66 #ifndef LIBC_SCCS 67 #ifndef lint 68 static const char sccsid[] = "@(#)strftime.c 5.4 (Berkeley) 3/14/89"; 69 #endif /* !defined lint */ 70 #endif /* !defined LIBC_SCCS */ 71 72 #include "tzfile.h" 73 #include "fcntl.h" 74 #include "locale.h" 75 76 #ifdef __weak_alias 77 __weak_alias(strftime_z, _strftime_z) 78 #endif 79 80 #include "sys/localedef.h" 81 #define Locale _CurrentTimeLocale 82 #define c_fmt d_t_fmt 83 84 static char * _add(const char *, char *, const char *); 85 static char * _conv(int, const char *, char *, const char *); 86 static char * _fmt(const timezone_t, const char *, const struct tm *, char *, 87 const char *, int *); 88 static char * _yconv(int, int, int, int, char *, const char *); 89 90 extern char * tzname[]; 91 92 #ifndef YEAR_2000_NAME 93 #define YEAR_2000_NAME "CHECK_STRFTIME_FORMATS_FOR_TWO_DIGIT_YEARS" 94 #endif /* !defined YEAR_2000_NAME */ 95 96 #define IN_NONE 0 97 #define IN_SOME 1 98 #define IN_THIS 2 99 #define IN_ALL 3 100 101 size_t 102 strftime_z(const timezone_t sp, char * const s, const size_t maxsize, 103 const char * const format, const struct tm * const t) 104 { 105 char * p; 106 int warn; 107 108 warn = IN_NONE; 109 p = _fmt(sp, ((format == NULL) ? "%c" : format), t, s, s + maxsize, 110 &warn); 111 #ifndef NO_RUN_TIME_WARNINGS_ABOUT_YEAR_2000_PROBLEMS_THANK_YOU 112 if (warn != IN_NONE && getenv(YEAR_2000_NAME) != NULL) { 113 (void) fprintf(stderr, "\n"); 114 if (format == NULL) 115 (void) fprintf(stderr, "NULL strftime format "); 116 else (void) fprintf(stderr, "strftime format \"%s\" ", 117 format); 118 (void) fprintf(stderr, "yields only two digits of years in "); 119 if (warn == IN_SOME) 120 (void) fprintf(stderr, "some locales"); 121 else if (warn == IN_THIS) 122 (void) fprintf(stderr, "the current locale"); 123 else (void) fprintf(stderr, "all locales"); 124 (void) fprintf(stderr, "\n"); 125 } 126 #endif /* !defined NO_RUN_TIME_WARNINGS_ABOUT_YEAR_2000_PROBLEMS_THANK_YOU */ 127 if (p == s + maxsize) 128 return 0; 129 *p = '\0'; 130 return p - s; 131 } 132 133 static char * 134 _fmt(const timezone_t sp, const char *format, const struct tm * const t, 135 char *pt, const char *const ptlim, int *warnp) 136 { 137 for ( ; *format; ++format) { 138 if (*format == '%') { 139 label: 140 switch (*++format) { 141 case '\0': 142 --format; 143 break; 144 case 'A': 145 pt = _add((t->tm_wday < 0 || 146 t->tm_wday >= DAYSPERWEEK) ? 147 "?" : Locale->day[t->tm_wday], 148 pt, ptlim); 149 continue; 150 case 'a': 151 pt = _add((t->tm_wday < 0 || 152 t->tm_wday >= DAYSPERWEEK) ? 153 "?" : Locale->abday[t->tm_wday], 154 pt, ptlim); 155 continue; 156 case 'B': 157 pt = _add((t->tm_mon < 0 || 158 t->tm_mon >= MONSPERYEAR) ? 159 "?" : Locale->mon[t->tm_mon], 160 pt, ptlim); 161 continue; 162 case 'b': 163 case 'h': 164 pt = _add((t->tm_mon < 0 || 165 t->tm_mon >= MONSPERYEAR) ? 166 "?" : Locale->abmon[t->tm_mon], 167 pt, ptlim); 168 continue; 169 case 'C': 170 /* 171 ** %C used to do a... 172 ** _fmt("%a %b %e %X %Y", t); 173 ** ...whereas now POSIX 1003.2 calls for 174 ** something completely different. 175 ** (ado, 1993-05-24) 176 */ 177 pt = _yconv(t->tm_year, TM_YEAR_BASE, 1, 0, 178 pt, ptlim); 179 continue; 180 case 'c': 181 { 182 int warn2 = IN_SOME; 183 184 pt = _fmt(sp, Locale->c_fmt, t, pt, ptlim, &warn2); 185 if (warn2 == IN_ALL) 186 warn2 = IN_THIS; 187 if (warn2 > *warnp) 188 *warnp = warn2; 189 } 190 continue; 191 case 'D': 192 pt = _fmt(sp, "%m/%d/%y", t, pt, ptlim, warnp); 193 continue; 194 case 'd': 195 pt = _conv(t->tm_mday, "%02d", pt, ptlim); 196 continue; 197 case 'E': 198 case 'O': 199 /* 200 ** C99 locale modifiers. 201 ** The sequences 202 ** %Ec %EC %Ex %EX %Ey %EY 203 ** %Od %oe %OH %OI %Om %OM 204 ** %OS %Ou %OU %OV %Ow %OW %Oy 205 ** are supposed to provide alternate 206 ** representations. 207 */ 208 goto label; 209 case 'e': 210 pt = _conv(t->tm_mday, "%2d", pt, ptlim); 211 continue; 212 case 'F': 213 pt = _fmt(sp, "%Y-%m-%d", t, pt, ptlim, warnp); 214 continue; 215 case 'H': 216 pt = _conv(t->tm_hour, "%02d", pt, ptlim); 217 continue; 218 case 'I': 219 pt = _conv((t->tm_hour % 12) ? 220 (t->tm_hour % 12) : 12, 221 "%02d", pt, ptlim); 222 continue; 223 case 'j': 224 pt = _conv(t->tm_yday + 1, "%03d", pt, ptlim); 225 continue; 226 case 'k': 227 /* 228 ** This used to be... 229 ** _conv(t->tm_hour % 12 ? 230 ** t->tm_hour % 12 : 12, 2, ' '); 231 ** ...and has been changed to the below to 232 ** match SunOS 4.1.1 and Arnold Robbins' 233 ** strftime version 3.0. That is, "%k" and 234 ** "%l" have been swapped. 235 ** (ado, 1993-05-24) 236 */ 237 pt = _conv(t->tm_hour, "%2d", pt, ptlim); 238 continue; 239 #ifdef KITCHEN_SINK 240 case 'K': 241 /* 242 ** After all this time, still unclaimed! 243 */ 244 pt = _add("kitchen sink", pt, ptlim); 245 continue; 246 #endif /* defined KITCHEN_SINK */ 247 case 'l': 248 /* 249 ** This used to be... 250 ** _conv(t->tm_hour, 2, ' '); 251 ** ...and has been changed to the below to 252 ** match SunOS 4.1.1 and Arnold Robbin's 253 ** strftime version 3.0. That is, "%k" and 254 ** "%l" have been swapped. 255 ** (ado, 1993-05-24) 256 */ 257 pt = _conv((t->tm_hour % 12) ? 258 (t->tm_hour % 12) : 12, 259 "%2d", pt, ptlim); 260 continue; 261 case 'M': 262 pt = _conv(t->tm_min, "%02d", pt, ptlim); 263 continue; 264 case 'm': 265 pt = _conv(t->tm_mon + 1, "%02d", pt, ptlim); 266 continue; 267 case 'n': 268 pt = _add("\n", pt, ptlim); 269 continue; 270 case 'p': 271 pt = _add((t->tm_hour >= (HOURSPERDAY / 2)) ? 272 Locale->am_pm[1] : 273 Locale->am_pm[0], 274 pt, ptlim); 275 continue; 276 case 'R': 277 pt = _fmt(sp, "%H:%M", t, pt, ptlim, warnp); 278 continue; 279 case 'r': 280 pt = _fmt(sp, Locale->t_fmt_ampm, t, pt, ptlim, 281 warnp); 282 continue; 283 case 'S': 284 pt = _conv(t->tm_sec, "%02d", pt, ptlim); 285 continue; 286 case 's': 287 { 288 struct tm tm; 289 char buf[INT_STRLEN_MAXIMUM( 290 time_t) + 1]; 291 time_t mkt; 292 293 tm = *t; 294 mkt = mktime(&tm); 295 /* CONSTCOND */ 296 if (TYPE_SIGNED(time_t)) 297 (void) snprintf(buf, sizeof(buf), 298 "%lld", (long long) mkt); 299 else (void) snprintf(buf, sizeof(buf), 300 "%llu", (unsigned long long) 301 mkt); 302 pt = _add(buf, pt, ptlim); 303 } 304 continue; 305 case 'T': 306 pt = _fmt(sp, "%H:%M:%S", t, pt, ptlim, warnp); 307 continue; 308 case 't': 309 pt = _add("\t", pt, ptlim); 310 continue; 311 case 'U': 312 pt = _conv((t->tm_yday + DAYSPERWEEK - 313 t->tm_wday) / DAYSPERWEEK, 314 "%02d", pt, ptlim); 315 continue; 316 case 'u': 317 /* 318 ** From Arnold Robbins' strftime version 3.0: 319 ** "ISO 8601: Weekday as a decimal number 320 ** [1 (Monday) - 7]" 321 ** (ado, 1993-05-24) 322 */ 323 pt = _conv((t->tm_wday == 0) ? 324 DAYSPERWEEK : t->tm_wday, 325 "%d", pt, ptlim); 326 continue; 327 case 'V': /* ISO 8601 week number */ 328 case 'G': /* ISO 8601 year (four digits) */ 329 case 'g': /* ISO 8601 year (two digits) */ 330 /* 331 ** From Arnold Robbins' strftime version 3.0: "the week number of the 332 ** year (the first Monday as the first day of week 1) as a decimal number 333 ** (01-53)." 334 ** (ado, 1993-05-24) 335 ** 336 ** From "http://www.ft.uni-erlangen.de/~mskuhn/iso-time.html" by Markus Kuhn: 337 ** "Week 01 of a year is per definition the first week which has the 338 ** Thursday in this year, which is equivalent to the week which contains 339 ** the fourth day of January. In other words, the first week of a new year 340 ** is the week which has the majority of its days in the new year. Week 01 341 ** might also contain days from the previous year and the week before week 342 ** 01 of a year is the last week (52 or 53) of the previous year even if 343 ** it contains days from the new year. A week starts with Monday (day 1) 344 ** and ends with Sunday (day 7). For example, the first week of the year 345 ** 1997 lasts from 1996-12-30 to 1997-01-05..." 346 ** (ado, 1996-01-02) 347 */ 348 { 349 int year; 350 int base; 351 int yday; 352 int wday; 353 int w; 354 355 year = t->tm_year; 356 base = TM_YEAR_BASE; 357 yday = t->tm_yday; 358 wday = t->tm_wday; 359 for ( ; ; ) { 360 int len; 361 int bot; 362 int top; 363 364 len = isleap_sum(year, base) ? 365 DAYSPERLYEAR : 366 DAYSPERNYEAR; 367 /* 368 ** What yday (-3 ... 3) does 369 ** the ISO year begin on? 370 */ 371 bot = ((yday + 11 - wday) % 372 DAYSPERWEEK) - 3; 373 /* 374 ** What yday does the NEXT 375 ** ISO year begin on? 376 */ 377 top = bot - 378 (len % DAYSPERWEEK); 379 if (top < -3) 380 top += DAYSPERWEEK; 381 top += len; 382 if (yday >= top) { 383 ++base; 384 w = 1; 385 break; 386 } 387 if (yday >= bot) { 388 w = 1 + ((yday - bot) / 389 DAYSPERWEEK); 390 break; 391 } 392 --base; 393 yday += isleap_sum(year, base) ? 394 DAYSPERLYEAR : 395 DAYSPERNYEAR; 396 } 397 #ifdef XPG4_1994_04_09 398 if ((w == 52 && 399 t->tm_mon == TM_JANUARY) || 400 (w == 1 && 401 t->tm_mon == TM_DECEMBER)) 402 w = 53; 403 #endif /* defined XPG4_1994_04_09 */ 404 if (*format == 'V') 405 pt = _conv(w, "%02d", 406 pt, ptlim); 407 else if (*format == 'g') { 408 *warnp = IN_ALL; 409 pt = _yconv(year, base, 0, 1, 410 pt, ptlim); 411 } else pt = _yconv(year, base, 1, 1, 412 pt, ptlim); 413 } 414 continue; 415 case 'v': 416 /* 417 ** From Arnold Robbins' strftime version 3.0: 418 ** "date as dd-bbb-YYYY" 419 ** (ado, 1993-05-24) 420 */ 421 pt = _fmt(sp, "%e-%b-%Y", t, pt, ptlim, warnp); 422 continue; 423 case 'W': 424 pt = _conv((t->tm_yday + DAYSPERWEEK - 425 (t->tm_wday ? 426 (t->tm_wday - 1) : 427 (DAYSPERWEEK - 1))) / DAYSPERWEEK, 428 "%02d", pt, ptlim); 429 continue; 430 case 'w': 431 pt = _conv(t->tm_wday, "%d", pt, ptlim); 432 continue; 433 case 'X': 434 pt = _fmt(sp, Locale->t_fmt, t, pt, ptlim, warnp); 435 continue; 436 case 'x': 437 { 438 int warn2 = IN_SOME; 439 440 pt = _fmt(sp, Locale->d_fmt, t, pt, ptlim, &warn2); 441 if (warn2 == IN_ALL) 442 warn2 = IN_THIS; 443 if (warn2 > *warnp) 444 *warnp = warn2; 445 } 446 continue; 447 case 'y': 448 *warnp = IN_ALL; 449 pt = _yconv(t->tm_year, TM_YEAR_BASE, 0, 1, 450 pt, ptlim); 451 continue; 452 case 'Y': 453 pt = _yconv(t->tm_year, TM_YEAR_BASE, 1, 1, 454 pt, ptlim); 455 continue; 456 case 'Z': 457 #ifdef TM_ZONE 458 if (t->TM_ZONE != NULL) 459 pt = _add(t->TM_ZONE, pt, ptlim); 460 else 461 #endif /* defined TM_ZONE */ 462 if (t->tm_isdst >= 0) 463 pt = _add((sp ? 464 tzgetname(sp, t->tm_isdst) : 465 tzname[t->tm_isdst != 0]), 466 pt, ptlim); 467 /* 468 ** C99 says that %Z must be replaced by the 469 ** empty string if the time zone is not 470 ** determinable. 471 */ 472 continue; 473 case 'z': 474 { 475 int diff; 476 char const * sign; 477 478 if (t->tm_isdst < 0) 479 continue; 480 #ifdef TM_GMTOFF 481 diff = (int)t->TM_GMTOFF; 482 #else /* !defined TM_GMTOFF */ 483 /* 484 ** C99 says that the UTC offset must 485 ** be computed by looking only at 486 ** tm_isdst. This requirement is 487 ** incorrect, since it means the code 488 ** must rely on magic (in this case 489 ** altzone and timezone), and the 490 ** magic might not have the correct 491 ** offset. Doing things correctly is 492 ** tricky and requires disobeying C99; 493 ** see GNU C strftime for details. 494 ** For now, punt and conform to the 495 ** standard, even though it's incorrect. 496 ** 497 ** C99 says that %z must be replaced by the 498 ** empty string if the time zone is not 499 ** determinable, so output nothing if the 500 ** appropriate variables are not available. 501 */ 502 #ifndef STD_INSPIRED 503 if (t->tm_isdst == 0) 504 #ifdef USG_COMPAT 505 diff = -timezone; 506 #else /* !defined USG_COMPAT */ 507 continue; 508 #endif /* !defined USG_COMPAT */ 509 else 510 #ifdef ALTZONE 511 diff = -altzone; 512 #else /* !defined ALTZONE */ 513 continue; 514 #endif /* !defined ALTZONE */ 515 #else /* defined STD_INSPIRED */ 516 { 517 struct tm tmp; 518 time_t lct, gct; 519 520 /* 521 ** Get calendar time from t 522 ** being treated as local. 523 */ 524 tmp = *t; /* mktime discards const */ 525 lct = mktime(&tmp); 526 527 if (lct == (time_t)-1) 528 continue; 529 530 /* 531 ** Get calendar time from t 532 ** being treated as GMT. 533 **/ 534 tmp = *t; /* mktime discards const */ 535 gct = timegm(&tmp); 536 537 if (gct == (time_t)-1) 538 continue; 539 540 /* LINTED difference will fit int */ 541 diff = (intmax_t)gct - (intmax_t)lct; 542 } 543 #endif /* defined STD_INSPIRED */ 544 #endif /* !defined TM_GMTOFF */ 545 if (diff < 0) { 546 sign = "-"; 547 diff = -diff; 548 } else sign = "+"; 549 pt = _add(sign, pt, ptlim); 550 diff /= SECSPERMIN; 551 diff = (diff / MINSPERHOUR) * 100 + 552 (diff % MINSPERHOUR); 553 pt = _conv(diff, "%04d", pt, ptlim); 554 } 555 continue; 556 #if 0 557 case '+': 558 pt = _fmt(sp, Locale->date_fmt, t, pt, ptlim, 559 warnp); 560 continue; 561 #endif 562 case '%': 563 /* 564 ** X311J/88-090 (4.12.3.5): if conversion char is 565 ** undefined, behavior is undefined. Print out the 566 ** character itself as printf(3) also does. 567 */ 568 default: 569 break; 570 } 571 } 572 if (pt == ptlim) 573 break; 574 *pt++ = *format; 575 } 576 return pt; 577 } 578 579 size_t 580 strftime(char * const s, const size_t maxsize, 581 const char * const format, const struct tm * const t) 582 { 583 tzset(); 584 return strftime_z(NULL, s, maxsize, format, t); 585 } 586 587 static char * 588 _conv(n, format, pt, ptlim) 589 const int n; 590 const char * const format; 591 char * const pt; 592 const char * const ptlim; 593 { 594 char buf[INT_STRLEN_MAXIMUM(int) + 1]; 595 596 (void) snprintf(buf, sizeof(buf), format, n); 597 return _add(buf, pt, ptlim); 598 } 599 600 static char * 601 _add(str, pt, ptlim) 602 const char * str; 603 char * pt; 604 const char * const ptlim; 605 { 606 while (pt < ptlim && (*pt = *str++) != '\0') 607 ++pt; 608 return pt; 609 } 610 611 /* 612 ** POSIX and the C Standard are unclear or inconsistent about 613 ** what %C and %y do if the year is negative or exceeds 9999. 614 ** Use the convention that %C concatenated with %y yields the 615 ** same output as %Y, and that %Y contains at least 4 bytes, 616 ** with more only if necessary. 617 */ 618 619 static char * 620 _yconv(a, b, convert_top, convert_yy, pt, ptlim) 621 const int a; 622 const int b; 623 const int convert_top; 624 const int convert_yy; 625 char * pt; 626 const char * const ptlim; 627 { 628 register int lead; 629 register int trail; 630 631 #define DIVISOR 100 632 trail = a % DIVISOR + b % DIVISOR; 633 lead = a / DIVISOR + b / DIVISOR + trail / DIVISOR; 634 trail %= DIVISOR; 635 if (trail < 0 && lead > 0) { 636 trail += DIVISOR; 637 --lead; 638 } else if (lead < 0 && trail > 0) { 639 trail -= DIVISOR; 640 ++lead; 641 } 642 if (convert_top) { 643 if (lead == 0 && trail < 0) 644 pt = _add("-0", pt, ptlim); 645 else pt = _conv(lead, "%02d", pt, ptlim); 646 } 647 if (convert_yy) 648 pt = _conv(((trail < 0) ? -trail : trail), "%02d", pt, ptlim); 649 return pt; 650 } 651 652 #ifdef LOCALE_HOME 653 static struct lc_time_T * 654 _loc(void) 655 { 656 static const char locale_home[] = LOCALE_HOME; 657 static const char lc_time[] = "LC_TIME"; 658 static char * locale_buf; 659 660 int fd; 661 int oldsun; /* "...ain't got nothin' to do..." */ 662 char * lbuf; 663 char * name; 664 char * p; 665 const char ** ap; 666 const char * plim; 667 char filename[FILENAME_MAX]; 668 struct stat st; 669 size_t namesize; 670 size_t bufsize; 671 672 /* 673 ** Use localebuf.mon[0] to signal whether locale is already set up. 674 */ 675 if (localebuf.mon[0]) 676 return &localebuf; 677 name = setlocale(LC_TIME, (char *) NULL); 678 if (name == NULL || *name == '\0') 679 goto no_locale; 680 /* 681 ** If the locale name is the same as our cache, use the cache. 682 */ 683 lbuf = locale_buf; 684 if (lbuf != NULL && strcmp(name, lbuf) == 0) { 685 p = lbuf; 686 for (ap = (const char **) &localebuf; 687 ap < (const char **) (&localebuf + 1); 688 ++ap) 689 *ap = p += strlen(p) + 1; 690 return &localebuf; 691 } 692 /* 693 ** Slurp the locale file into the cache. 694 */ 695 namesize = strlen(name) + 1; 696 if (sizeof filename < 697 ((sizeof locale_home) + namesize + (sizeof lc_time))) 698 goto no_locale; 699 oldsun = 0; 700 (void) sprintf(filename, "%s/%s/%s", locale_home, name, lc_time); 701 fd = open(filename, O_RDONLY); 702 if (fd < 0) { 703 /* 704 ** Old Sun systems have a different naming and data convention. 705 */ 706 oldsun = 1; 707 (void) sprintf(filename, "%s/%s/%s", locale_home, 708 lc_time, name); 709 fd = open(filename, O_RDONLY); 710 if (fd < 0) 711 goto no_locale; 712 } 713 if (fstat(fd, &st) != 0) 714 goto bad_locale; 715 if (st.st_size <= 0) 716 goto bad_locale; 717 bufsize = namesize + st.st_size; 718 locale_buf = NULL; 719 lbuf = (lbuf == NULL) ? malloc(bufsize) : realloc(lbuf, bufsize); 720 if (lbuf == NULL) 721 goto bad_locale; 722 (void) strcpy(lbuf, name); 723 p = lbuf + namesize; 724 plim = p + st.st_size; 725 if (read(fd, p, (size_t) st.st_size) != st.st_size) 726 goto bad_lbuf; 727 if (close(fd) != 0) 728 goto bad_lbuf; 729 /* 730 ** Parse the locale file into localebuf. 731 */ 732 if (plim[-1] != '\n') 733 goto bad_lbuf; 734 for (ap = (const char **) &localebuf; 735 ap < (const char **) (&localebuf + 1); 736 ++ap) { 737 if (p == plim) 738 goto bad_lbuf; 739 *ap = p; 740 while (*p != '\n') 741 ++p; 742 *p++ = '\0'; 743 } 744 if (oldsun) { 745 /* 746 ** SunOS 4 used an obsolescent format; see localdtconv(3). 747 ** c_fmt had the ``short format for dates and times together'' 748 ** (SunOS 4 date, "%a %b %e %T %Z %Y" in the C locale); 749 ** date_fmt had the ``long format for dates'' 750 ** (SunOS 4 strftime %C, "%A, %B %e, %Y" in the C locale). 751 ** Discard the latter in favor of the former. 752 */ 753 localebuf.date_fmt = localebuf.c_fmt; 754 } 755 /* 756 ** Record the successful parse in the cache. 757 */ 758 locale_buf = lbuf; 759 760 return &localebuf; 761 762 bad_lbuf: 763 free(lbuf); 764 bad_locale: 765 (void) close(fd); 766 no_locale: 767 localebuf = C_time_locale; 768 locale_buf = NULL; 769 return &localebuf; 770 } 771 #endif /* defined LOCALE_HOME */ 772
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