1 static char elsieid[] = "@(#)zdump.c 8.8"; 2 3 /* 4 ** This code has been made independent of the rest of the time 5 ** conversion package to increase confidence in the verification it provides. 6 ** You can use this code to help in verifying other implementations. 7 */ 8 9 /* 10 * ICU note: Mr. Arthur David Olson (olsona (at) dc37a.nci.nih.gov) stated that 11 * "zdump.c is indeed in the public domain" in e-mail on Feb 22, 2007. 12 * This version of zdump.c is modified by ICU team to change output format 13 * and some additional options. 14 */ 15 16 17 #include "stdio.h" /* for stdout, stderr, perror */ 18 #include "string.h" /* for strcpy */ 19 #include "sys/types.h" /* for time_t */ 20 #include "time.h" /* for struct tm */ 21 #include "stdlib.h" /* for exit, malloc, atoi */ 22 #include "float.h" /* for FLT_MAX and DBL_MAX */ 23 #include "ctype.h" /* for isalpha et al. */ 24 25 /* Enable extensions and modifications for ICU. */ 26 #define ICU 27 28 #ifdef ICU 29 #include "dirent.h" 30 #endif 31 32 #ifndef isascii 33 #define isascii(x) 1 34 #endif /* !defined isascii */ 35 36 #ifndef ZDUMP_LO_YEAR 37 #define ZDUMP_LO_YEAR (-500) 38 #endif /* !defined ZDUMP_LO_YEAR */ 39 40 #ifndef ZDUMP_HI_YEAR 41 #define ZDUMP_HI_YEAR 2500 42 #endif /* !defined ZDUMP_HI_YEAR */ 43 44 #ifndef MAX_STRING_LENGTH 45 #define MAX_STRING_LENGTH 1024 46 #endif /* !defined MAX_STRING_LENGTH */ 47 48 #ifndef TRUE 49 #define TRUE 1 50 #endif /* !defined TRUE */ 51 52 #ifndef FALSE 53 #define FALSE 0 54 #endif /* !defined FALSE */ 55 56 #ifndef EXIT_SUCCESS 57 #define EXIT_SUCCESS 0 58 #endif /* !defined EXIT_SUCCESS */ 59 60 #ifndef EXIT_FAILURE 61 #define EXIT_FAILURE 1 62 #endif /* !defined EXIT_FAILURE */ 63 64 #ifndef SECSPERMIN 65 #define SECSPERMIN 60 66 #endif /* !defined SECSPERMIN */ 67 68 #ifndef MINSPERHOUR 69 #define MINSPERHOUR 60 70 #endif /* !defined MINSPERHOUR */ 71 72 #ifndef SECSPERHOUR 73 #define SECSPERHOUR (SECSPERMIN * MINSPERHOUR) 74 #endif /* !defined SECSPERHOUR */ 75 76 #ifndef HOURSPERDAY 77 #define HOURSPERDAY 24 78 #endif /* !defined HOURSPERDAY */ 79 80 #ifndef EPOCH_YEAR 81 #define EPOCH_YEAR 1970 82 #endif /* !defined EPOCH_YEAR */ 83 84 #ifndef TM_YEAR_BASE 85 #define TM_YEAR_BASE 1900 86 #endif /* !defined TM_YEAR_BASE */ 87 88 #ifndef DAYSPERNYEAR 89 #define DAYSPERNYEAR 365 90 #endif /* !defined DAYSPERNYEAR */ 91 92 #ifndef isleap 93 #define isleap(y) (((y) % 4) == 0 && (((y) % 100) != 0 || ((y) % 400) == 0)) 94 #endif /* !defined isleap */ 95 96 #ifndef isleap_sum 97 /* 98 ** See tzfile.h for details on isleap_sum. 99 */ 100 #define isleap_sum(a, b) isleap((a) % 400 + (b) % 400) 101 #endif /* !defined isleap_sum */ 102 103 #define SECSPERDAY ((long) SECSPERHOUR * HOURSPERDAY) 104 #define SECSPERNYEAR (SECSPERDAY * DAYSPERNYEAR) 105 #define SECSPERLYEAR (SECSPERNYEAR + SECSPERDAY) 106 107 #ifndef HAVE_GETTEXT 108 #define HAVE_GETTEXT 0 109 #endif 110 #if HAVE_GETTEXT 111 #include "locale.h" /* for setlocale */ 112 #include "libintl.h" 113 #endif /* HAVE_GETTEXT */ 114 115 #ifndef GNUC_or_lint 116 #ifdef lint 117 #define GNUC_or_lint 118 #else /* !defined lint */ 119 #ifdef __GNUC__ 120 #define GNUC_or_lint 121 #endif /* defined __GNUC__ */ 122 #endif /* !defined lint */ 123 #endif /* !defined GNUC_or_lint */ 124 125 #ifndef INITIALIZE 126 #ifdef GNUC_or_lint 127 #define INITIALIZE(x) ((x) = 0) 128 #else /* !defined GNUC_or_lint */ 129 #define INITIALIZE(x) 130 #endif /* !defined GNUC_or_lint */ 131 #endif /* !defined INITIALIZE */ 132 133 /* 134 ** For the benefit of GNU folk... 135 ** `_(MSGID)' uses the current locale's message library string for MSGID. 136 ** The default is to use gettext if available, and use MSGID otherwise. 137 */ 138 139 #ifndef _ 140 #if HAVE_GETTEXT 141 #define _(msgid) gettext(msgid) 142 #else /* !HAVE_GETTEXT */ 143 #define _(msgid) msgid 144 #endif /* !HAVE_GETTEXT */ 145 #endif /* !defined _ */ 146 147 #ifndef TZ_DOMAIN 148 #define TZ_DOMAIN "tz" 149 #endif /* !defined TZ_DOMAIN */ 150 151 extern char ** environ; 152 extern int getopt(int argc, char * const argv[], 153 const char * options); 154 extern char * optarg; 155 extern int optind; 156 extern char * tzname[2]; 157 158 static time_t absolute_min_time; 159 static time_t absolute_max_time; 160 static size_t longest; 161 static char * progname; 162 static int warned; 163 164 static char * abbr(struct tm * tmp); 165 static void abbrok(const char * abbrp, const char * zone); 166 static long delta(struct tm * newp, struct tm * oldp); 167 static void dumptime(const struct tm * tmp); 168 static time_t hunt(char * name, time_t lot, time_t hit); 169 static void setabsolutes(void); 170 static void show(char * zone, time_t t, int v); 171 static const char * tformat(void); 172 static time_t yeartot(long y); 173 #ifdef ICU 174 typedef struct listentry { 175 char * name; 176 struct listentry * next; 177 } listentry; 178 179 static time_t huntICU(char * name, time_t lot, time_t hit, FILE *fp); 180 static void dumptimeICU(FILE * fp, time_t t); 181 static void showICU(FILE * fp, char * zone, time_t t1, time_t t2); 182 static int getall(struct listentry ** namelist); 183 static void getzones(char * basedir, char * subdir, struct listentry ** last, int * count); 184 #endif 185 186 #ifndef TYPECHECK 187 #define my_localtime localtime 188 #else /* !defined TYPECHECK */ 189 static struct tm * 190 my_localtime(tp) 191 time_t * tp; 192 { 193 register struct tm * tmp; 194 195 tmp = localtime(tp); 196 if (tp != NULL && tmp != NULL) { 197 struct tm tm; 198 register time_t t; 199 200 tm = *tmp; 201 t = mktime(&tm); 202 if (t - *tp >= 1 || *tp - t >= 1) { 203 (void) fflush(stdout); 204 (void) fprintf(stderr, "\n%s: ", progname); 205 (void) fprintf(stderr, tformat(), *tp); 206 (void) fprintf(stderr, " ->"); 207 (void) fprintf(stderr, " year=%d", tmp->tm_year); 208 (void) fprintf(stderr, " mon=%d", tmp->tm_mon); 209 (void) fprintf(stderr, " mday=%d", tmp->tm_mday); 210 (void) fprintf(stderr, " hour=%d", tmp->tm_hour); 211 (void) fprintf(stderr, " min=%d", tmp->tm_min); 212 (void) fprintf(stderr, " sec=%d", tmp->tm_sec); 213 (void) fprintf(stderr, " isdst=%d", tmp->tm_isdst); 214 (void) fprintf(stderr, " -> "); 215 (void) fprintf(stderr, tformat(), t); 216 (void) fprintf(stderr, "\n"); 217 } 218 } 219 return tmp; 220 } 221 #endif /* !defined TYPECHECK */ 222 223 static void 224 abbrok(abbrp, zone) 225 const char * const abbrp; 226 const char * const zone; 227 { 228 register const char * cp; 229 register char * wp; 230 231 if (warned) 232 return; 233 cp = abbrp; 234 wp = NULL; 235 while (isascii((unsigned char) *cp) && isalpha((unsigned char) *cp)) 236 ++cp; 237 if (cp - abbrp == 0) 238 wp = _("lacks alphabetic at start"); 239 else if (cp - abbrp < 3) 240 wp = _("has fewer than 3 alphabetics"); 241 else if (cp - abbrp > 6) 242 wp = _("has more than 6 alphabetics"); 243 if (wp == NULL && (*cp == '+' || *cp == '-')) { 244 ++cp; 245 if (isascii((unsigned char) *cp) && 246 isdigit((unsigned char) *cp)) 247 if (*cp++ == '1' && *cp >= '0' && *cp <= '4') 248 ++cp; 249 if (*cp != '\0') 250 wp = _("differs from POSIX standard"); 251 } 252 if (wp == NULL) 253 return; 254 (void) fflush(stdout); 255 (void) fprintf(stderr, 256 _("%s: warning: zone \"%s\" abbreviation \"%s\" %s\n"), 257 progname, zone, abbrp, wp); 258 warned = TRUE; 259 } 260 261 static void 262 usage(const char *progname, FILE *stream, int status) 263 { 264 (void) fprintf(stream, 265 _("%s: usage is %s [ --version ] [ --help ] [ -v ] [ -c [loyear,]hiyear ] zonename ...\n\ 266 \n\ 267 Report bugs to tz (at) elsie.nci.nih.gov.\n"), 268 progname, progname); 269 exit(status); 270 } 271 272 int 273 main(argc, argv) 274 int argc; 275 char * argv[]; 276 { 277 register int i; 278 register int c; 279 register int vflag; 280 register char * cutarg; 281 register long cutloyear = ZDUMP_LO_YEAR; 282 register long cuthiyear = ZDUMP_HI_YEAR; 283 register time_t cutlotime; 284 register time_t cuthitime; 285 register char ** fakeenv; 286 time_t now; 287 time_t t; 288 time_t newt; 289 struct tm tm; 290 struct tm newtm; 291 register struct tm * tmp; 292 register struct tm * newtmp; 293 #ifdef ICU 294 int nextopt; 295 char * dirarg; 296 int aflag; 297 int iflag; 298 listentry * namelist = NULL; 299 FILE * fp = stdout; 300 #endif 301 302 INITIALIZE(cutlotime); 303 INITIALIZE(cuthitime); 304 #if HAVE_GETTEXT 305 (void) setlocale(LC_ALL, ""); 306 #ifdef TZ_DOMAINDIR 307 (void) bindtextdomain(TZ_DOMAIN, TZ_DOMAINDIR); 308 #endif /* defined TEXTDOMAINDIR */ 309 (void) textdomain(TZ_DOMAIN); 310 #endif /* HAVE_GETTEXT */ 311 progname = argv[0]; 312 for (i = 1; i < argc; ++i) 313 if (strcmp(argv[i], "--version") == 0) { 314 (void) printf("%s\n", elsieid); 315 exit(EXIT_SUCCESS); 316 } else if (strcmp(argv[i], "--help") == 0) { 317 usage(progname, stdout, EXIT_SUCCESS); 318 } 319 vflag = 0; 320 cutarg = NULL; 321 #ifdef ICU 322 aflag = 0; 323 iflag = 0; 324 dirarg = NULL; 325 nextopt = 1; 326 while(nextopt) { 327 c = getopt(argc, argv, "ac:d:iv"); 328 switch(c) { 329 case 'a': 330 aflag = 1; 331 break; 332 case 'c': 333 cutarg = optarg; 334 break; 335 case 'd': 336 dirarg = optarg; 337 break; 338 case 'i': 339 iflag = 1; 340 break; 341 case 'v': 342 vflag = 1; 343 break; 344 default: 345 nextopt = 0; 346 break; 347 } 348 } 349 if ((c != EOF && c != -1) || 350 (optind == argc - 1 && strcmp(argv[optind], "=") == 0)) { 351 (void) fprintf(stderr, 352 _("%s: usage is %s [ --version ] [ -a ] [ -v ] [ -i ] [ -c [loyear,]hiyear ] [ -d dir ] [ zonename ... ]\n"), 353 progname, progname); 354 exit(EXIT_FAILURE); 355 } 356 357 if (dirarg != NULL) { 358 DIR * dp; 359 /* create the output directory */ 360 mkdir(dirarg, 0777); 361 if ((dp = opendir(dirarg)) == NULL) { 362 fprintf(stderr, "cannot create the target directory"); 363 exit(EXIT_FAILURE); 364 } 365 closedir(dp); 366 } 367 #else 368 while ((c = getopt(argc, argv, "c:v")) == 'c' || c == 'v') 369 if (c == 'v') 370 vflag = 1; 371 else cutarg = optarg; 372 if ((c != EOF && c != -1) || 373 (optind == argc - 1 && strcmp(argv[optind], "=") == 0)) { 374 usage(progname, stderr, EXIT_FAILURE); 375 } 376 #endif 377 if (vflag) { 378 if (cutarg != NULL) { 379 long lo; 380 long hi; 381 char dummy; 382 383 if (sscanf(cutarg, "%ld%c", &hi, &dummy) == 1) { 384 cuthiyear = hi; 385 } else if (sscanf(cutarg, "%ld,%ld%c", 386 &lo, &hi, &dummy) == 2) { 387 cutloyear = lo; 388 cuthiyear = hi; 389 } else { 390 (void) fprintf(stderr, _("%s: wild -c argument %s\n"), 391 progname, cutarg); 392 exit(EXIT_FAILURE); 393 } 394 } 395 setabsolutes(); 396 cutlotime = yeartot(cutloyear); 397 cuthitime = yeartot(cuthiyear); 398 } 399 400 #ifdef ICU 401 if (aflag) { 402 /* get all available zones */ 403 char ** fakeargv; 404 int i; 405 int count; 406 407 count = getall(&namelist); 408 409 fakeargv = (char **) malloc((size_t) (argc + count) * sizeof *argv); 410 /* 411 if ((fakeargv = (char **) malloc((size_t) (argc + count) * sizeof *argv)) == NULL) { 412 exit(EXIT_FAILURE); 413 } 414 */ 415 for (i = 0; i < argc; i++) { 416 fakeargv[i] = argv[i]; 417 } 418 for (i = 0; i < count; i++) { 419 fakeargv[i + argc] = namelist->name; 420 namelist = namelist->next; 421 } 422 argv = fakeargv; 423 argc += count; 424 } 425 #endif 426 (void) time(&now); 427 longest = 0; 428 for (i = optind; i < argc; ++i) 429 if (strlen(argv[i]) > longest) 430 longest = strlen(argv[i]); 431 { 432 register int from; 433 register int to; 434 435 for (i = 0; environ[i] != NULL; ++i) 436 continue; 437 fakeenv = (char **) malloc((size_t) ((i + 2) * 438 sizeof *fakeenv)); 439 if (fakeenv == NULL || 440 (fakeenv[0] = (char *) malloc(longest + 4)) == NULL) { 441 (void) perror(progname); 442 exit(EXIT_FAILURE); 443 } 444 to = 0; 445 (void) strcpy(fakeenv[to++], "TZ="); 446 for (from = 0; environ[from] != NULL; ++from) 447 if (strncmp(environ[from], "TZ=", 3) != 0) 448 fakeenv[to++] = environ[from]; 449 fakeenv[to] = NULL; 450 environ = fakeenv; 451 } 452 for (i = optind; i < argc; ++i) { 453 static char buf[MAX_STRING_LENGTH]; 454 455 (void) strcpy(&fakeenv[0][3], argv[i]); 456 if (!vflag) { 457 show(argv[i], now, FALSE); 458 continue; 459 } 460 #ifdef ICU 461 fp = NULL; 462 if (iflag) { 463 if (dirarg == NULL) { 464 /* we want to display a zone name here */ 465 if (i != optind) { 466 printf("\n"); 467 } 468 printf("ZONE: %s\n", argv[i]); 469 } else { 470 int zstart; 471 char path[FILENAME_MAX + 1]; 472 strcpy(path, dirarg); 473 strcat(path, "/"); 474 zstart = strlen(path); 475 strcat(path, argv[i]); 476 /* replace '/' with '-' */ 477 while(path[++zstart] != 0) { 478 if (path[zstart] == '/') { 479 path[zstart] = '-'; 480 } 481 } 482 if ((fp = fopen(path, "w")) == NULL) { 483 fprintf(stderr, "cannot create output file %s\n", path); 484 exit(EXIT_FAILURE); 485 } 486 } 487 } 488 #endif 489 warned = FALSE; 490 t = absolute_min_time; 491 #ifdef ICU 492 /* skip displaying info for the lowest time, which is actually not 493 * a transition when -i option is set */ 494 if (!iflag) { 495 #endif 496 show(argv[i], t, TRUE); 497 t += SECSPERHOUR * HOURSPERDAY; 498 show(argv[i], t, TRUE); 499 #ifdef ICU 500 } 501 #endif 502 if (t < cutlotime) 503 t = cutlotime; 504 tmp = my_localtime(&t); 505 if (tmp != NULL) { 506 tm = *tmp; 507 (void) strncpy(buf, abbr(&tm), (sizeof buf) - 1); 508 } 509 for ( ; ; ) { 510 if (t >= cuthitime || t >= cuthitime - SECSPERHOUR * 12) 511 break; 512 newt = t + SECSPERHOUR * 12; 513 newtmp = localtime(&newt); 514 if (newtmp != NULL) 515 newtm = *newtmp; 516 #ifdef ICU 517 if (iflag) { 518 /* We do not want to capture transitions just for 519 * abbreviated zone name changes */ 520 if ((tmp == NULL || newtmp == NULL) ? (tmp != newtmp) : 521 (delta(&newtm, &tm) != (newt - t) || 522 newtm.tm_isdst != tm.tm_isdst)) { 523 newt = huntICU(argv[i], t, newt, fp); 524 newtmp = localtime(&newt); 525 if (newtmp != NULL) { 526 newtm = *newtmp; 527 (void) strncpy(buf, 528 abbr(&newtm), 529 (sizeof buf) - 1); 530 } 531 } 532 } else { 533 #endif 534 if ((tmp == NULL || newtmp == NULL) ? (tmp != newtmp) : 535 (delta(&newtm, &tm) != (newt - t) || 536 newtm.tm_isdst != tm.tm_isdst || 537 strcmp(abbr(&newtm), buf) != 0)) { 538 newt = hunt(argv[i], t, newt); 539 newtmp = localtime(&newt); 540 if (newtmp != NULL) { 541 newtm = *newtmp; 542 (void) strncpy(buf, 543 abbr(&newtm), 544 (sizeof buf) - 1); 545 } 546 } 547 #ifdef ICU 548 } 549 #endif 550 t = newt; 551 tm = newtm; 552 tmp = newtmp; 553 } 554 #ifdef ICU 555 if (!iflag) { 556 /* skip displaying info for the highest time, which is actually not 557 * a transition when -i option is used*/ 558 #endif 559 t = absolute_max_time; 560 t -= SECSPERHOUR * HOURSPERDAY; 561 show(argv[i], t, TRUE); 562 t += SECSPERHOUR * HOURSPERDAY; 563 show(argv[i], t, TRUE); 564 565 #ifdef ICU 566 } 567 /* close file */ 568 if (fp != NULL) { 569 fclose(fp); 570 } 571 #endif 572 } 573 if (fflush(stdout) || ferror(stdout)) { 574 (void) fprintf(stderr, "%s: ", progname); 575 (void) perror(_("Error writing to standard output")); 576 exit(EXIT_FAILURE); 577 } 578 #ifdef ICU 579 if (aflag) { 580 struct listentry * entry = namelist; 581 struct listentry * next; 582 while (entry != NULL) { 583 free(entry->name); 584 next = entry->next; 585 free(entry); 586 entry = next; 587 } 588 } 589 #endif 590 exit(EXIT_SUCCESS); 591 /* If exit fails to exit... */ 592 return EXIT_FAILURE; 593 } 594 595 static void 596 setabsolutes(void) 597 { 598 if (0.5 == (time_t) 0.5) { 599 /* 600 ** time_t is floating. 601 */ 602 if (sizeof (time_t) == sizeof (float)) { 603 absolute_min_time = (time_t) -FLT_MAX; 604 absolute_max_time = (time_t) FLT_MAX; 605 } else if (sizeof (time_t) == sizeof (double)) { 606 absolute_min_time = (time_t) -DBL_MAX; 607 absolute_max_time = (time_t) DBL_MAX; 608 } else { 609 (void) fprintf(stderr, 610 _("%s: use of -v on system with floating time_t other than float or double\n"), 611 progname); 612 exit(EXIT_FAILURE); 613 } 614 } else if (0 > (time_t) -1) { 615 /* 616 ** time_t is signed. Assume overflow wraps around. 617 */ 618 time_t t = 0; 619 time_t t1 = 1; 620 621 while (t < t1) { 622 t = t1; 623 t1 = 2 * t1 + 1; 624 } 625 626 absolute_max_time = t; 627 t = -t; 628 absolute_min_time = t - 1; 629 if (t < absolute_min_time) 630 absolute_min_time = t; 631 } else { 632 /* 633 ** time_t is unsigned. 634 */ 635 absolute_min_time = 0; 636 absolute_max_time = absolute_min_time - 1; 637 } 638 } 639 640 static time_t 641 yeartot(y) 642 const long y; 643 { 644 register long myy; 645 register long seconds; 646 register time_t t; 647 648 myy = EPOCH_YEAR; 649 t = 0; 650 while (myy != y) { 651 if (myy < y) { 652 seconds = isleap(myy) ? SECSPERLYEAR : SECSPERNYEAR; 653 ++myy; 654 if (t > absolute_max_time - seconds) { 655 t = absolute_max_time; 656 break; 657 } 658 t += seconds; 659 } else { 660 --myy; 661 seconds = isleap(myy) ? SECSPERLYEAR : SECSPERNYEAR; 662 if (t < absolute_min_time + seconds) { 663 t = absolute_min_time; 664 break; 665 } 666 t -= seconds; 667 } 668 } 669 return t; 670 } 671 672 static time_t 673 hunt(char *name, time_t lot, time_t hit) 674 { 675 time_t t; 676 long diff; 677 struct tm lotm; 678 register struct tm * lotmp; 679 struct tm tm; 680 register struct tm * tmp; 681 char loab[MAX_STRING_LENGTH]; 682 683 lotmp = my_localtime(&lot); 684 if (lotmp != NULL) { 685 lotm = *lotmp; 686 (void) strncpy(loab, abbr(&lotm), (sizeof loab) - 1); 687 } 688 for ( ; ; ) { 689 diff = (long) (hit - lot); 690 if (diff < 2) 691 break; 692 t = lot; 693 t += diff / 2; 694 if (t <= lot) 695 ++t; 696 else if (t >= hit) 697 --t; 698 tmp = my_localtime(&t); 699 if (tmp != NULL) 700 tm = *tmp; 701 if ((lotmp == NULL || tmp == NULL) ? (lotmp == tmp) : 702 (delta(&tm, &lotm) == (t - lot) && 703 tm.tm_isdst == lotm.tm_isdst && 704 strcmp(abbr(&tm), loab) == 0)) { 705 lot = t; 706 lotm = tm; 707 lotmp = tmp; 708 } else hit = t; 709 } 710 show(name, lot, TRUE); 711 show(name, hit, TRUE); 712 return hit; 713 } 714 715 /* 716 ** Thanks to Paul Eggert for logic used in delta. 717 */ 718 719 static long 720 delta(newp, oldp) 721 struct tm * newp; 722 struct tm * oldp; 723 { 724 register long result; 725 register int tmy; 726 727 if (newp->tm_year < oldp->tm_year) 728 return -delta(oldp, newp); 729 result = 0; 730 for (tmy = oldp->tm_year; tmy < newp->tm_year; ++tmy) 731 result += DAYSPERNYEAR + isleap_sum(tmy, TM_YEAR_BASE); 732 result += newp->tm_yday - oldp->tm_yday; 733 result *= HOURSPERDAY; 734 result += newp->tm_hour - oldp->tm_hour; 735 result *= MINSPERHOUR; 736 result += newp->tm_min - oldp->tm_min; 737 result *= SECSPERMIN; 738 result += newp->tm_sec - oldp->tm_sec; 739 return result; 740 } 741 742 static void 743 show(char *zone, time_t t, int v) 744 { 745 register struct tm * tmp; 746 747 (void) printf("%-*s ", (int) longest, zone); 748 if (v) { 749 tmp = gmtime(&t); 750 if (tmp == NULL) { 751 (void) printf(tformat(), t); 752 } else { 753 dumptime(tmp); 754 (void) printf(" UTC"); 755 } 756 (void) printf(" = "); 757 } 758 tmp = my_localtime(&t); 759 dumptime(tmp); 760 if (tmp != NULL) { 761 if (*abbr(tmp) != '\0') 762 (void) printf(" %s", abbr(tmp)); 763 if (v) { 764 (void) printf(" isdst=%d", tmp->tm_isdst); 765 #ifdef TM_GMTOFF 766 (void) printf(" gmtoff=%ld", tmp->TM_GMTOFF); 767 #endif /* defined TM_GMTOFF */ 768 } 769 } 770 (void) printf("\n"); 771 if (tmp != NULL && *abbr(tmp) != '\0') 772 abbrok(abbr(tmp), zone); 773 } 774 775 static char * 776 abbr(tmp) 777 struct tm * tmp; 778 { 779 register char * result; 780 static char nada; 781 782 if (tmp->tm_isdst != 0 && tmp->tm_isdst != 1) 783 return &nada; 784 result = tzname[tmp->tm_isdst]; 785 return (result == NULL) ? &nada : result; 786 } 787 788 /* 789 ** The code below can fail on certain theoretical systems; 790 ** it works on all known real-world systems as of 2004-12-30. 791 */ 792 793 static const char * 794 tformat(void) 795 { 796 if (0.5 == (time_t) 0.5) { /* floating */ 797 if (sizeof (time_t) > sizeof (double)) 798 return "%Lg"; 799 return "%g"; 800 } 801 if (0 > (time_t) -1) { /* signed */ 802 if (sizeof (time_t) > sizeof (long)) 803 return "%lld"; 804 if (sizeof (time_t) > sizeof (int)) 805 return "%ld"; 806 return "%d"; 807 } 808 if (sizeof (time_t) > sizeof (unsigned long)) 809 return "%llu"; 810 if (sizeof (time_t) > sizeof (unsigned int)) 811 return "%lu"; 812 return "%u"; 813 } 814 815 static void 816 dumptime(timeptr) 817 register const struct tm * timeptr; 818 { 819 static const char wday_name[][3] = { 820 "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat" 821 }; 822 static const char mon_name[][3] = { 823 "Jan", "Feb", "Mar", "Apr", "May", "Jun", 824 "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" 825 }; 826 register const char * wn; 827 register const char * mn; 828 register int lead; 829 register int trail; 830 831 if (timeptr == NULL) { 832 (void) printf("NULL"); 833 return; 834 } 835 /* 836 ** The packaged versions of localtime and gmtime never put out-of-range 837 ** values in tm_wday or tm_mon, but since this code might be compiled 838 ** with other (perhaps experimental) versions, paranoia is in order. 839 */ 840 if (timeptr->tm_wday < 0 || timeptr->tm_wday >= 841 (int) (sizeof wday_name / sizeof wday_name[0])) 842 wn = "???"; 843 else wn = wday_name[timeptr->tm_wday]; 844 if (timeptr->tm_mon < 0 || timeptr->tm_mon >= 845 (int) (sizeof mon_name / sizeof mon_name[0])) 846 mn = "???"; 847 else mn = mon_name[timeptr->tm_mon]; 848 (void) printf("%.3s %.3s%3d %.2d:%.2d:%.2d ", 849 wn, mn, 850 timeptr->tm_mday, timeptr->tm_hour, 851 timeptr->tm_min, timeptr->tm_sec); 852 #define DIVISOR 10 853 trail = timeptr->tm_year % DIVISOR + TM_YEAR_BASE % DIVISOR; 854 lead = timeptr->tm_year / DIVISOR + TM_YEAR_BASE / DIVISOR + 855 trail / DIVISOR; 856 trail %= DIVISOR; 857 if (trail < 0 && lead > 0) { 858 trail += DIVISOR; 859 --lead; 860 } else if (lead < 0 && trail > 0) { 861 trail -= DIVISOR; 862 ++lead; 863 } 864 if (lead == 0) 865 (void) printf("%d", trail); 866 else (void) printf("%d%d", lead, ((trail < 0) ? -trail : trail)); 867 } 868 869 #ifdef ICU 870 static time_t 871 huntICU(char *name, time_t lot, time_t hit, FILE * fp) 872 { 873 time_t t; 874 long diff; 875 struct tm lotm; 876 register struct tm * lotmp; 877 struct tm tm; 878 register struct tm * tmp; 879 char loab[MAX_STRING_LENGTH]; 880 881 lotmp = my_localtime(&lot); 882 if (lotmp != NULL) { 883 lotm = *lotmp; 884 (void) strncpy(loab, abbr(&lotm), (sizeof loab) - 1); 885 } 886 for ( ; ; ) { 887 diff = (long) (hit - lot); 888 if (diff < 2) 889 break; 890 t = lot; 891 t += diff / 2; 892 if (t <= lot) 893 ++t; 894 else if (t >= hit) 895 --t; 896 tmp = my_localtime(&t); 897 if (tmp != NULL) 898 tm = *tmp; 899 /* We do not want to capture transitions just for 900 * abbreviated zone name changes */ 901 if ((lotmp == NULL || tmp == NULL) ? (lotmp == tmp) : 902 (delta(&tm, &lotm) == (t - lot) && 903 tm.tm_isdst == lotm.tm_isdst)) { 904 lot = t; 905 lotm = tm; 906 lotmp = tmp; 907 } else hit = t; 908 } 909 showICU(fp, name, lot, hit); 910 return hit; 911 } 912 913 static void showICU(FILE * fp, char *zone, time_t t1, time_t t2) 914 { 915 if (fp == NULL) { 916 fp = stdout; 917 } 918 dumptimeICU(fp, t1); 919 fprintf(fp, " > "); 920 dumptimeICU(fp, t2); 921 fprintf(fp, "\n"); 922 } 923 924 static void dumptimeICU(FILE * fp, time_t t) 925 { 926 static const char wday_name[][3] = { 927 "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat" 928 }; 929 struct tm gmt; 930 struct tm loc; 931 register int lead; 932 register int trail; 933 long offset; 934 long hour, min, sec; 935 936 loc = *my_localtime(&t); 937 938 trail = loc.tm_year % DIVISOR + TM_YEAR_BASE % DIVISOR; 939 lead = loc.tm_year / DIVISOR + TM_YEAR_BASE / DIVISOR + trail / DIVISOR; 940 trail %= DIVISOR; 941 if (trail < 0 && lead > 0) { 942 trail += DIVISOR; 943 --lead; 944 } else if (lead < 0 && trail > 0) { 945 trail -= DIVISOR; 946 ++lead; 947 } 948 949 fprintf(fp, "%04d-%02d-%02d", lead * DIVISOR + trail, loc.tm_mon + 1, loc.tm_mday); 950 fprintf(fp, " %.3s ", wday_name[loc.tm_wday]); 951 fprintf(fp, "%02d:%02d:%02d", loc.tm_hour, loc.tm_min, loc.tm_sec); 952 953 gmt = *gmtime(&t); 954 offset = delta(&loc, &gmt); 955 if (offset < 0) { 956 offset = -offset; 957 fprintf(fp, "-"); 958 } else { 959 fprintf(fp, "+"); 960 } 961 962 sec = offset % 60; 963 offset = (offset - sec) / 60; 964 min = offset % 60; 965 hour = offset / 60; 966 967 fprintf(fp, "%02d", hour); 968 fprintf(fp, "%02d", min); 969 fprintf(fp, "%02d", sec); 970 fprintf(fp, "[DST=%d]", loc.tm_isdst); 971 } 972 973 static int getall(struct listentry ** namelist) { 974 int count = 0; 975 struct listentry dummyentry; 976 struct listentry * last = &dummyentry; 977 978 getzones(TZDIR, NULL, &last, &count); 979 if (count > 0) { 980 *namelist = dummyentry.next; 981 } 982 983 return count; 984 } 985 986 static void getzones(char * basedir, char * relpath, struct listentry ** last, int * count) { 987 char path[FILENAME_MAX + 1]; 988 struct dirent * dir; 989 DIR * dp; 990 991 strcpy(path, basedir); 992 if (relpath != NULL) { 993 strcat(path, "/"); 994 strcat(path, relpath); 995 } 996 997 if ((dp = opendir(path)) == NULL) { 998 /* file */ 999 if (strstr(relpath, ".tab") == NULL) { 1000 char * pzonename; 1001 listentry * pentry; 1002 1003 if ((pzonename = malloc(strlen(relpath) + 1)) == NULL) { 1004 exit(EXIT_FAILURE); 1005 } 1006 strcpy(pzonename, relpath); 1007 1008 if ((pentry = malloc(sizeof(listentry))) == NULL) { 1009 exit(EXIT_FAILURE); 1010 } 1011 1012 pentry->name = pzonename; 1013 pentry->next = NULL; 1014 (*last)->next = pentry; 1015 *last = pentry; 1016 (*count)++; 1017 } 1018 } else { 1019 /* directory */ 1020 while ((dir = readdir(dp)) != NULL) { 1021 char subpath[FILENAME_MAX + 1]; 1022 1023 if (strcmp(dir->d_name, ".") == 0 1024 || strcmp(dir->d_name, "..") == 0) { 1025 continue; 1026 } 1027 if (relpath != NULL) { 1028 strcpy(subpath, relpath); 1029 strcat(subpath, "/"); 1030 strcat(subpath, dir->d_name); 1031 } else { 1032 strcpy(subpath, dir->d_name); 1033 } 1034 getzones(basedir, subpath, last, count); 1035 } 1036 closedir(dp); 1037 } 1038 } 1039 #endif 1040
