1 /* $NetBSD: strftime.c,v 1.24 2013/03/02 21:24:28 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 1.24 2013/03/02 21:24:28 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 copyright notice and sccsid 17 ** appearing below. 18 ** 19 ** This is ANSIish only when "multibyte character == plain character". 20 */ 21 22 #include "private.h" 23 24 /* 25 ** We don't use these extensions in strftime operation even when 26 ** supported by the local tzcode configuration. A strictly 27 ** conforming C application may leave them in undefined state. 28 */ 29 30 #ifdef _LIBC 31 #undef TM_ZONE 32 #undef TM_GMTOFF 33 #endif 34 35 /* 36 ** Copyright (c) 1989, 1993 37 ** The Regents of the University of California. All rights reserved. 38 ** 39 ** Redistribution and use in source and binary forms, with or without 40 ** modification, are permitted provided that the following conditions 41 ** are met: 42 ** 1. Redistributions of source code must retain the above copyright 43 ** notice, this list of conditions and the following disclaimer. 44 ** 2. Redistributions in binary form must reproduce the above copyright 45 ** notice, this list of conditions and the following disclaimer in the 46 ** documentation and/or other materials provided with the distribution. 47 ** 3. All advertising materials mentioning features or use of this software 48 ** must display the following acknowledgement: 49 ** This product includes software developed by the University of 50 ** California, Berkeley and its contributors. 51 ** 4. Neither the name of the University nor the names of its contributors 52 ** may be used to endorse or promote products derived from this software 53 ** without specific prior written permission. 54 ** 55 ** THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 56 ** ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 57 ** IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 58 ** ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 59 ** FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 60 ** DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 61 ** OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 62 ** HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 63 ** LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 64 ** OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 65 ** SUCH DAMAGE. 66 */ 67 68 #ifndef LIBC_SCCS 69 #ifndef lint 70 static const char sccsid[] = "@(#)strftime.c 5.4 (Berkeley) 3/14/89"; 71 #endif /* !defined lint */ 72 #endif /* !defined LIBC_SCCS */ 73 74 #include "tzfile.h" 75 #include "fcntl.h" 76 #include "locale.h" 77 78 #ifdef __weak_alias 79 __weak_alias(strftime_z, _strftime_z) 80 #endif 81 82 #include "sys/localedef.h" 83 #define Locale _CurrentTimeLocale 84 #define c_fmt d_t_fmt 85 86 static char * _add(const char *, char *, const char *); 87 static char * _conv(int, const char *, char *, const char *); 88 static char * _fmt(const timezone_t, const char *, const struct tm *, char *, 89 const char *, int *); 90 static char * _yconv(int, int, int, int, char *, const char *); 91 92 extern char * tzname[]; 93 94 #ifndef YEAR_2000_NAME 95 #define YEAR_2000_NAME "CHECK_STRFTIME_FORMATS_FOR_TWO_DIGIT_YEARS" 96 #endif /* !defined YEAR_2000_NAME */ 97 98 #define IN_NONE 0 99 #define IN_SOME 1 100 #define IN_THIS 2 101 #define IN_ALL 3 102 103 size_t 104 strftime_z(const timezone_t sp, char *const s, const size_t maxsize, 105 const char *const format, const struct tm *const t) 106 { 107 char * p; 108 int warn; 109 110 warn = IN_NONE; 111 p = _fmt(sp, ((format == NULL) ? "%c" : format), t, s, s + maxsize, 112 &warn); 113 #ifndef NO_RUN_TIME_WARNINGS_ABOUT_YEAR_2000_PROBLEMS_THANK_YOU 114 if (warn != IN_NONE && getenv(YEAR_2000_NAME) != NULL) { 115 (void) fprintf(stderr, "\n"); 116 if (format == NULL) 117 (void) fprintf(stderr, "NULL strftime format "); 118 else (void) fprintf(stderr, "strftime format \"%s\" ", 119 format); 120 (void) fprintf(stderr, "yields only two digits of years in "); 121 if (warn == IN_SOME) 122 (void) fprintf(stderr, "some locales"); 123 else if (warn == IN_THIS) 124 (void) fprintf(stderr, "the current locale"); 125 else (void) fprintf(stderr, "all locales"); 126 (void) fprintf(stderr, "\n"); 127 } 128 #endif /* !defined NO_RUN_TIME_WARNINGS_ABOUT_YEAR_2000_PROBLEMS_THANK_YOU */ 129 if (p == s + maxsize) 130 return 0; 131 *p = '\0'; 132 return p - s; 133 } 134 135 static char * 136 _fmt(const timezone_t sp, const char *format, const struct tm *const t, 137 char *pt, const char *const ptlim, int *warnp) 138 { 139 for ( ; *format; ++format) { 140 if (*format == '%') { 141 label: 142 switch (*++format) { 143 case '\0': 144 --format; 145 break; 146 case 'A': 147 pt = _add((t->tm_wday < 0 || 148 t->tm_wday >= DAYSPERWEEK) ? 149 "?" : Locale->day[t->tm_wday], 150 pt, ptlim); 151 continue; 152 case 'a': 153 pt = _add((t->tm_wday < 0 || 154 t->tm_wday >= DAYSPERWEEK) ? 155 "?" : Locale->abday[t->tm_wday], 156 pt, ptlim); 157 continue; 158 case 'B': 159 pt = _add((t->tm_mon < 0 || 160 t->tm_mon >= MONSPERYEAR) ? 161 "?" : Locale->mon[t->tm_mon], 162 pt, ptlim); 163 continue; 164 case 'b': 165 case 'h': 166 pt = _add((t->tm_mon < 0 || 167 t->tm_mon >= MONSPERYEAR) ? 168 "?" : Locale->abmon[t->tm_mon], 169 pt, ptlim); 170 continue; 171 case 'C': 172 /* 173 ** %C used to do a... 174 ** _fmt("%a %b %e %X %Y", t); 175 ** ...whereas now POSIX 1003.2 calls for 176 ** something completely different. 177 ** (ado, 1993-05-24) 178 */ 179 pt = _yconv(t->tm_year, TM_YEAR_BASE, 1, 0, 180 pt, ptlim); 181 continue; 182 case 'c': 183 { 184 int warn2 = IN_SOME; 185 186 pt = _fmt(sp, Locale->c_fmt, t, pt, ptlim, &warn2); 187 if (warn2 == IN_ALL) 188 warn2 = IN_THIS; 189 if (warn2 > *warnp) 190 *warnp = warn2; 191 } 192 continue; 193 case 'D': 194 pt = _fmt(sp, "%m/%d/%y", t, pt, ptlim, warnp); 195 continue; 196 case 'd': 197 pt = _conv(t->tm_mday, "%02d", pt, ptlim); 198 continue; 199 case 'E': 200 case 'O': 201 /* 202 ** C99 locale modifiers. 203 ** The sequences 204 ** %Ec %EC %Ex %EX %Ey %EY 205 ** %Od %oe %OH %OI %Om %OM 206 ** %OS %Ou %OU %OV %Ow %OW %Oy 207 ** are supposed to provide alternate 208 ** representations. 209 */ 210 goto label; 211 case 'e': 212 pt = _conv(t->tm_mday, "%2d", pt, ptlim); 213 continue; 214 case 'F': 215 pt = _fmt(sp, "%Y-%m-%d", t, pt, ptlim, warnp); 216 continue; 217 case 'H': 218 pt = _conv(t->tm_hour, "%02d", pt, ptlim); 219 continue; 220 case 'I': 221 pt = _conv((t->tm_hour % 12) ? 222 (t->tm_hour % 12) : 12, 223 "%02d", pt, ptlim); 224 continue; 225 case 'j': 226 pt = _conv(t->tm_yday + 1, "%03d", pt, ptlim); 227 continue; 228 case 'k': 229 /* 230 ** This used to be... 231 ** _conv(t->tm_hour % 12 ? 232 ** t->tm_hour % 12 : 12, 2, ' '); 233 ** ...and has been changed to the below to 234 ** match SunOS 4.1.1 and Arnold Robbins' 235 ** strftime version 3.0. That is, "%k" and 236 ** "%l" have been swapped. 237 ** (ado, 1993-05-24) 238 */ 239 pt = _conv(t->tm_hour, "%2d", pt, ptlim); 240 continue; 241 #ifdef KITCHEN_SINK 242 case 'K': 243 /* 244 ** After all this time, still unclaimed! 245 */ 246 pt = _add("kitchen sink", pt, ptlim); 247 continue; 248 #endif /* defined KITCHEN_SINK */ 249 case 'l': 250 /* 251 ** This used to be... 252 ** _conv(t->tm_hour, 2, ' '); 253 ** ...and has been changed to the below to 254 ** match SunOS 4.1.1 and Arnold Robbin's 255 ** strftime version 3.0. That is, "%k" and 256 ** "%l" have been swapped. 257 ** (ado, 1993-05-24) 258 */ 259 pt = _conv((t->tm_hour % 12) ? 260 (t->tm_hour % 12) : 12, 261 "%2d", pt, ptlim); 262 continue; 263 case 'M': 264 pt = _conv(t->tm_min, "%02d", pt, ptlim); 265 continue; 266 case 'm': 267 pt = _conv(t->tm_mon + 1, "%02d", pt, ptlim); 268 continue; 269 case 'n': 270 pt = _add("\n", pt, ptlim); 271 continue; 272 case 'p': 273 pt = _add((t->tm_hour >= (HOURSPERDAY / 2)) ? 274 Locale->am_pm[1] : 275 Locale->am_pm[0], 276 pt, ptlim); 277 continue; 278 case 'R': 279 pt = _fmt(sp, "%H:%M", t, pt, ptlim, warnp); 280 continue; 281 case 'r': 282 pt = _fmt(sp, Locale->t_fmt_ampm, t, pt, ptlim, 283 warnp); 284 continue; 285 case 'S': 286 pt = _conv(t->tm_sec, "%02d", pt, ptlim); 287 continue; 288 case 's': 289 { 290 struct tm tm; 291 char buf[INT_STRLEN_MAXIMUM( 292 time_t) + 1]; 293 time_t mkt; 294 295 tm = *t; 296 mkt = mktime(&tm); 297 /* CONSTCOND */ 298 if (TYPE_SIGNED(time_t)) 299 (void) snprintf(buf, sizeof(buf), 300 "%lld", (long long) mkt); 301 else (void) snprintf(buf, sizeof(buf), 302 "%llu", (unsigned long long) 303 mkt); 304 pt = _add(buf, pt, ptlim); 305 } 306 continue; 307 case 'T': 308 pt = _fmt(sp, "%H:%M:%S", t, pt, ptlim, warnp); 309 continue; 310 case 't': 311 pt = _add("\t", pt, ptlim); 312 continue; 313 case 'U': 314 pt = _conv((t->tm_yday + DAYSPERWEEK - 315 t->tm_wday) / DAYSPERWEEK, 316 "%02d", pt, ptlim); 317 continue; 318 case 'u': 319 /* 320 ** From Arnold Robbins' strftime version 3.0: 321 ** "ISO 8601: Weekday as a decimal number 322 ** [1 (Monday) - 7]" 323 ** (ado, 1993-05-24) 324 */ 325 pt = _conv((t->tm_wday == 0) ? 326 DAYSPERWEEK : t->tm_wday, 327 "%d", pt, ptlim); 328 continue; 329 case 'V': /* ISO 8601 week number */ 330 case 'G': /* ISO 8601 year (four digits) */ 331 case 'g': /* ISO 8601 year (two digits) */ 332 /* 333 ** From Arnold Robbins' strftime version 3.0: "the week number of the 334 ** year (the first Monday as the first day of week 1) as a decimal number 335 ** (01-53)." 336 ** (ado, 1993-05-24) 337 ** 338 ** From "http://www.ft.uni-erlangen.de/~mskuhn/iso-time.html" by Markus Kuhn: 339 ** "Week 01 of a year is per definition the first week which has the 340 ** Thursday in this year, which is equivalent to the week which contains 341 ** the fourth day of January. In other words, the first week of a new year 342 ** is the week which has the majority of its days in the new year. Week 01 343 ** might also contain days from the previous year and the week before week 344 ** 01 of a year is the last week (52 or 53) of the previous year even if 345 ** it contains days from the new year. A week starts with Monday (day 1) 346 ** and ends with Sunday (day 7). For example, the first week of the year 347 ** 1997 lasts from 1996-12-30 to 1997-01-05..." 348 ** (ado, 1996-01-02) 349 */ 350 { 351 int year; 352 int base; 353 int yday; 354 int wday; 355 int w; 356 357 year = t->tm_year; 358 base = TM_YEAR_BASE; 359 yday = t->tm_yday; 360 wday = t->tm_wday; 361 for ( ; ; ) { 362 int len; 363 int bot; 364 int top; 365 366 len = isleap_sum(year, base) ? 367 DAYSPERLYEAR : 368 DAYSPERNYEAR; 369 /* 370 ** What yday (-3 ... 3) does 371 ** the ISO year begin on? 372 */ 373 bot = ((yday + 11 - wday) % 374 DAYSPERWEEK) - 3; 375 /* 376 ** What yday does the NEXT 377 ** ISO year begin on? 378 */ 379 top = bot - 380 (len % DAYSPERWEEK); 381 if (top < -3) 382 top += DAYSPERWEEK; 383 top += len; 384 if (yday >= top) { 385 ++base; 386 w = 1; 387 break; 388 } 389 if (yday >= bot) { 390 w = 1 + ((yday - bot) / 391 DAYSPERWEEK); 392 break; 393 } 394 --base; 395 yday += isleap_sum(year, base) ? 396 DAYSPERLYEAR : 397 DAYSPERNYEAR; 398 } 399 #ifdef XPG4_1994_04_09 400 if ((w == 52 && 401 t->tm_mon == TM_JANUARY) || 402 (w == 1 && 403 t->tm_mon == TM_DECEMBER)) 404 w = 53; 405 #endif /* defined XPG4_1994_04_09 */ 406 if (*format == 'V') 407 pt = _conv(w, "%02d", 408 pt, ptlim); 409 else if (*format == 'g') { 410 *warnp = IN_ALL; 411 pt = _yconv(year, base, 0, 1, 412 pt, ptlim); 413 } else pt = _yconv(year, base, 1, 1, 414 pt, ptlim); 415 } 416 continue; 417 case 'v': 418 /* 419 ** From Arnold Robbins' strftime version 3.0: 420 ** "date as dd-bbb-YYYY" 421 ** (ado, 1993-05-24) 422 */ 423 pt = _fmt(sp, "%e-%b-%Y", t, pt, ptlim, warnp); 424 continue; 425 case 'W': 426 pt = _conv((t->tm_yday + DAYSPERWEEK - 427 (t->tm_wday ? 428 (t->tm_wday - 1) : 429 (DAYSPERWEEK - 1))) / DAYSPERWEEK, 430 "%02d", pt, ptlim); 431 continue; 432 case 'w': 433 pt = _conv(t->tm_wday, "%d", pt, ptlim); 434 continue; 435 case 'X': 436 pt = _fmt(sp, Locale->t_fmt, t, pt, ptlim, warnp); 437 continue; 438 case 'x': 439 { 440 int warn2 = IN_SOME; 441 442 pt = _fmt(sp, Locale->d_fmt, t, pt, ptlim, &warn2); 443 if (warn2 == IN_ALL) 444 warn2 = IN_THIS; 445 if (warn2 > *warnp) 446 *warnp = warn2; 447 } 448 continue; 449 case 'y': 450 *warnp = IN_ALL; 451 pt = _yconv(t->tm_year, TM_YEAR_BASE, 0, 1, 452 pt, ptlim); 453 continue; 454 case 'Y': 455 pt = _yconv(t->tm_year, TM_YEAR_BASE, 1, 1, 456 pt, ptlim); 457 continue; 458 case 'Z': 459 #ifdef TM_ZONE 460 if (t->TM_ZONE != NULL) 461 pt = _add(t->TM_ZONE, pt, ptlim); 462 else 463 #endif /* defined TM_ZONE */ 464 if (t->tm_isdst >= 0) 465 pt = _add((sp ? 466 tzgetname(sp, t->tm_isdst) : 467 tzname[t->tm_isdst != 0]), 468 pt, ptlim); 469 /* 470 ** C99 says that %Z must be replaced by the 471 ** empty string if the time zone is not 472 ** determinable. 473 */ 474 continue; 475 case 'z': 476 { 477 int diff; 478 char const * sign; 479 480 if (t->tm_isdst < 0) 481 continue; 482 #ifdef TM_GMTOFF 483 diff = (int)t->TM_GMTOFF; 484 #else /* !defined TM_GMTOFF */ 485 /* 486 ** C99 says that the UTC offset must 487 ** be computed by looking only at 488 ** tm_isdst. This requirement is 489 ** incorrect, since it means the code 490 ** must rely on magic (in this case 491 ** altzone and timezone), and the 492 ** magic might not have the correct 493 ** offset. Doing things correctly is 494 ** tricky and requires disobeying C99; 495 ** see GNU C strftime for details. 496 ** For now, punt and conform to the 497 ** standard, even though it's incorrect. 498 ** 499 ** C99 says that %z must be replaced by the 500 ** empty string if the time zone is not 501 ** determinable, so output nothing if the 502 ** appropriate variables are not available. 503 */ 504 #ifndef STD_INSPIRED 505 if (t->tm_isdst == 0) 506 #ifdef USG_COMPAT 507 diff = -timezone; 508 #else /* !defined USG_COMPAT */ 509 continue; 510 #endif /* !defined USG_COMPAT */ 511 else 512 #ifdef ALTZONE 513 diff = -altzone; 514 #else /* !defined ALTZONE */ 515 continue; 516 #endif /* !defined ALTZONE */ 517 #else /* defined STD_INSPIRED */ 518 { 519 struct tm tmp; 520 time_t lct, gct; 521 522 /* 523 ** Get calendar time from t 524 ** being treated as local. 525 */ 526 tmp = *t; /* mktime discards const */ 527 lct = mktime(&tmp); 528 529 if (lct == (time_t)-1) 530 continue; 531 532 /* 533 ** Get calendar time from t 534 ** being treated as GMT. 535 **/ 536 tmp = *t; /* mktime discards const */ 537 gct = timegm(&tmp); 538 539 if (gct == (time_t)-1) 540 continue; 541 542 /* LINTED difference will fit int */ 543 diff = (intmax_t)gct - (intmax_t)lct; 544 } 545 #endif /* defined STD_INSPIRED */ 546 #endif /* !defined TM_GMTOFF */ 547 if (diff < 0) { 548 sign = "-"; 549 diff = -diff; 550 } else sign = "+"; 551 pt = _add(sign, pt, ptlim); 552 diff /= SECSPERMIN; 553 diff = (diff / MINSPERHOUR) * 100 + 554 (diff % MINSPERHOUR); 555 pt = _conv(diff, "%04d", pt, ptlim); 556 } 557 continue; 558 #if 0 559 case '+': 560 pt = _fmt(sp, Locale->date_fmt, t, pt, ptlim, 561 warnp); 562 continue; 563 #endif 564 case '%': 565 /* 566 ** X311J/88-090 (4.12.3.5): if conversion char is 567 ** undefined, behavior is undefined. Print out the 568 ** character itself as printf(3) also does. 569 */ 570 default: 571 break; 572 } 573 } 574 if (pt == ptlim) 575 break; 576 *pt++ = *format; 577 } 578 return pt; 579 } 580 581 size_t 582 strftime(char * const s, const size_t maxsize, 583 const char * const format, const struct tm * const t) 584 { 585 tzset(); 586 return strftime_z(NULL, s, maxsize, format, t); 587 } 588 589 static char * 590 _conv(const int n, const char *const format, char *const pt, 591 const char *const ptlim) 592 { 593 char buf[INT_STRLEN_MAXIMUM(int) + 1]; 594 595 (void) snprintf(buf, sizeof(buf), format, n); 596 return _add(buf, pt, ptlim); 597 } 598 599 static char * 600 _add(const char *str, char *pt, const char *const ptlim) 601 { 602 while (pt < ptlim && (*pt = *str++) != '\0') 603 ++pt; 604 return pt; 605 } 606 607 /* 608 ** POSIX and the C Standard are unclear or inconsistent about 609 ** what %C and %y do if the year is negative or exceeds 9999. 610 ** Use the convention that %C concatenated with %y yields the 611 ** same output as %Y, and that %Y contains at least 4 bytes, 612 ** with more only if necessary. 613 */ 614 615 static char * 616 _yconv(const int a, const int b, const int convert_top, const int convert_yy, 617 char *pt, const char *const ptlim) 618 { 619 register int lead; 620 register int trail; 621 622 #define DIVISOR 100 623 trail = a % DIVISOR + b % DIVISOR; 624 lead = a / DIVISOR + b / DIVISOR + trail / DIVISOR; 625 trail %= DIVISOR; 626 if (trail < 0 && lead > 0) { 627 trail += DIVISOR; 628 --lead; 629 } else if (lead < 0 && trail > 0) { 630 trail -= DIVISOR; 631 ++lead; 632 } 633 if (convert_top) { 634 if (lead == 0 && trail < 0) 635 pt = _add("-0", pt, ptlim); 636 else pt = _conv(lead, "%02d", pt, ptlim); 637 } 638 if (convert_yy) 639 pt = _conv(((trail < 0) ? -trail : trail), "%02d", pt, ptlim); 640 return pt; 641 } 642 643 #ifdef LOCALE_HOME 644 static struct lc_time_T * 645 _loc(void) 646 { 647 static const char locale_home[] = LOCALE_HOME; 648 static const char lc_time[] = "LC_TIME"; 649 static char * locale_buf; 650 651 int fd; 652 int oldsun; /* "...ain't got nothin' to do..." */ 653 char * lbuf; 654 char * name; 655 char * p; 656 const char ** ap; 657 const char * plim; 658 char filename[FILENAME_MAX]; 659 struct stat st; 660 size_t namesize; 661 size_t bufsize; 662 663 /* 664 ** Use localebuf.mon[0] to signal whether locale is already set up. 665 */ 666 if (localebuf.mon[0]) 667 return &localebuf; 668 name = setlocale(LC_TIME, NULL); 669 if (name == NULL || *name == '\0') 670 goto no_locale; 671 /* 672 ** If the locale name is the same as our cache, use the cache. 673 */ 674 lbuf = locale_buf; 675 if (lbuf != NULL && strcmp(name, lbuf) == 0) { 676 p = lbuf; 677 for (ap = (const char **) &localebuf; 678 ap < (const char **) (&localebuf + 1); 679 ++ap) 680 *ap = p += strlen(p) + 1; 681 return &localebuf; 682 } 683 /* 684 ** Slurp the locale file into the cache. 685 */ 686 namesize = strlen(name) + 1; 687 if (sizeof filename < 688 ((sizeof locale_home) + namesize + (sizeof lc_time))) 689 goto no_locale; 690 oldsun = 0; 691 (void) sprintf(filename, "%s/%s/%s", locale_home, name, lc_time); 692 fd = open(filename, O_RDONLY); 693 if (fd < 0) { 694 /* 695 ** Old Sun systems have a different naming and data convention. 696 */ 697 oldsun = 1; 698 (void) sprintf(filename, "%s/%s/%s", locale_home, 699 lc_time, name); 700 fd = open(filename, O_RDONLY); 701 if (fd < 0) 702 goto no_locale; 703 } 704 if (fstat(fd, &st) != 0) 705 goto bad_locale; 706 if (st.st_size <= 0) 707 goto bad_locale; 708 bufsize = namesize + st.st_size; 709 locale_buf = NULL; 710 lbuf = (lbuf == NULL) ? malloc(bufsize) : realloc(lbuf, bufsize); 711 if (lbuf == NULL) 712 goto bad_locale; 713 (void) strcpy(lbuf, name); 714 p = lbuf + namesize; 715 plim = p + st.st_size; 716 if (read(fd, p, (size_t) st.st_size) != st.st_size) 717 goto bad_lbuf; 718 if (close(fd) != 0) 719 goto bad_lbuf; 720 /* 721 ** Parse the locale file into localebuf. 722 */ 723 if (plim[-1] != '\n') 724 goto bad_lbuf; 725 for (ap = (const char **) &localebuf; 726 ap < (const char **) (&localebuf + 1); 727 ++ap) { 728 if (p == plim) 729 goto bad_lbuf; 730 *ap = p; 731 while (*p != '\n') 732 ++p; 733 *p++ = '\0'; 734 } 735 if (oldsun) { 736 /* 737 ** SunOS 4 used an obsolescent format; see localdtconv(3). 738 ** c_fmt had the ``short format for dates and times together'' 739 ** (SunOS 4 date, "%a %b %e %T %Z %Y" in the C locale); 740 ** date_fmt had the ``long format for dates'' 741 ** (SunOS 4 strftime %C, "%A, %B %e, %Y" in the C locale). 742 ** Discard the latter in favor of the former. 743 */ 744 localebuf.date_fmt = localebuf.c_fmt; 745 } 746 /* 747 ** Record the successful parse in the cache. 748 */ 749 locale_buf = lbuf; 750 751 return &localebuf; 752 753 bad_lbuf: 754 free(lbuf); 755 bad_locale: 756 (void) close(fd); 757 no_locale: 758 localebuf = C_time_locale; 759 locale_buf = NULL; 760 return &localebuf; 761 } 762 #endif /* defined LOCALE_HOME */ 763