1 /* 2 * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 3 * Use is subject to license terms. 4 */ 5 6 /* 7 * zdump 7.24 8 * Taken from elsie.nci.nih.gov to replace the existing Solaris zdump, 9 * which was based on an earlier version of the elsie code. 10 * 11 * For zdump 7.24, the following changes were made to the elsie code: 12 * locale/textdomain/messages to match existing Solaris style. 13 * Solaris verbose mode is documented to display the current time first. 14 * cstyle cleaned code. 15 * removed old locale/textdomain code. 16 */ 17 18 static char elsieid[] = "@(#)zdump.c 7.74"; 19 20 /* 21 * This code has been made independent of the rest of the time 22 * conversion package to increase confidence in the verification it provides. 23 * You can use this code to help in verifying other implementations. 24 */ 25 26 #include "stdio.h" /* for stdout, stderr, perror */ 27 #include "string.h" /* for strcpy */ 28 #include "sys/types.h" /* for time_t */ 29 #include "time.h" /* for struct tm */ 30 #include "stdlib.h" /* for exit, malloc, atoi */ 31 #include "locale.h" /* for setlocale, textdomain */ 32 #include "libintl.h" 33 #include <ctype.h> 34 #include "tzfile.h" /* for defines */ 35 #include <limits.h> 36 37 #ifndef ZDUMP_LO_YEAR 38 #define ZDUMP_LO_YEAR (-500) 39 #endif /* !defined ZDUMP_LO_YEAR */ 40 41 #ifndef ZDUMP_HI_YEAR 42 #define ZDUMP_HI_YEAR 2500 43 #endif /* !defined ZDUMP_HI_YEAR */ 44 45 #ifndef MAX_STRING_LENGTH 46 #define MAX_STRING_LENGTH 1024 47 #endif /* !defined MAX_STRING_LENGTH */ 48 49 #ifndef TRUE 50 #define TRUE 1 51 #endif /* !defined TRUE */ 52 53 #ifndef FALSE 54 #define FALSE 0 55 #endif /* !defined FALSE */ 56 57 #ifndef isleap_sum 58 /* 59 * See tzfile.h for details on isleap_sum. 60 */ 61 #define isleap_sum(a, b) isleap((a) % 400 + (b) % 400) 62 #endif /* !defined isleap_sum */ 63 64 #ifndef SECSPERDAY 65 #define SECSPERDAY ((long)SECSPERHOUR * HOURSPERDAY) 66 #endif 67 #define SECSPERNYEAR (SECSPERDAY * DAYSPERNYEAR) 68 #define SECSPERLYEAR (SECSPERNYEAR + SECSPERDAY) 69 70 #ifndef GNUC_or_lint 71 #ifdef lint 72 #define GNUC_or_lint 73 #else /* !defined lint */ 74 #ifdef __GNUC__ 75 #define GNUC_or_lint 76 #endif /* defined __GNUC__ */ 77 #endif /* !defined lint */ 78 #endif /* !defined GNUC_or_lint */ 79 80 #ifndef INITIALIZE 81 #ifdef GNUC_or_lint 82 #define INITIALIZE(x) ((x) = 0) 83 #else /* !defined GNUC_or_lint */ 84 #define INITIALIZE(x) 85 #endif /* !defined GNUC_or_lint */ 86 #endif /* !defined INITIALIZE */ 87 88 static time_t absolute_min_time; 89 static time_t absolute_max_time; 90 static size_t longest; 91 static char *progname; 92 static int warned; 93 94 static char *abbr(struct tm *); 95 static void abbrok(const char *, const char *); 96 static long delta(struct tm *, struct tm *); 97 static void dumptime(const struct tm *); 98 static time_t hunt(char *, time_t, time_t); 99 static void setabsolutes(void); 100 static void show(char *, time_t, int); 101 static void usage(void); 102 static const char *tformat(void); 103 static time_t yeartot(long y); 104 105 #ifndef TYPECHECK 106 #define my_localtime localtime 107 #else /* !defined TYPECHECK */ 108 static struct tm * 109 my_localtime(tp) 110 time_t *tp; 111 { 112 register struct tm *tmp; 113 114 tmp = localtime(tp); 115 if (tp != NULL && tmp != NULL) { 116 struct tm tm; 117 register time_t t; 118 119 tm = *tmp; 120 t = mktime(&tm); 121 if (t - *tp >= 1 || *tp - t >= 1) { 122 (void) fflush(stdout); 123 (void) fprintf(stderr, "\n%s: ", progname); 124 (void) fprintf(stderr, tformat(), *tp); 125 (void) fprintf(stderr, " ->"); 126 (void) fprintf(stderr, " year=%d", tmp->tm_year); 127 (void) fprintf(stderr, " mon=%d", tmp->tm_mon); 128 (void) fprintf(stderr, " mday=%d", tmp->tm_mday); 129 (void) fprintf(stderr, " hour=%d", tmp->tm_hour); 130 (void) fprintf(stderr, " min=%d", tmp->tm_min); 131 (void) fprintf(stderr, " sec=%d", tmp->tm_sec); 132 (void) fprintf(stderr, " isdst=%d", tmp->tm_isdst); 133 (void) fprintf(stderr, " -> "); 134 (void) fprintf(stderr, tformat(), t); 135 (void) fprintf(stderr, "\n"); 136 } 137 } 138 return (tmp); 139 } 140 #endif /* !defined TYPECHECK */ 141 142 static void 143 abbrok(const char * const abbrp, const char * const zone) 144 { 145 register const char *cp; 146 int error = 0; 147 148 if (warned) 149 return; 150 cp = abbrp; 151 while (isalpha(*cp) || isdigit(*cp) || *cp == '-' || *cp == '+') 152 ++cp; 153 (void) fflush(stdout); 154 if (cp - abbrp < 3) { 155 (void) fprintf(stderr, gettext("%s: warning: zone \"%s\" " 156 "abbreviation \"%s\" has fewer than 3 alphabetics\n"), 157 progname, zone, abbrp); 158 error = 1; 159 } else if (cp - abbrp > 6) { 160 (void) fprintf(stderr, gettext("%s: warning: zone \"%s\" " 161 "abbreviation \"%s\" has more than 6 characters\n"), 162 progname, zone, abbrp); 163 error = 1; 164 } else if (*cp != '\0') { 165 (void) fprintf(stderr, gettext("%s: warning: zone \"%s\" " 166 "abbreviation \"%s\" has characters other than " 167 "alphanumerics\n"), progname, zone, abbrp); 168 error = 1; 169 } 170 if (error) 171 warned = TRUE; 172 } 173 174 int 175 main(argc, argv) 176 int argc; 177 char *argv[]; 178 { 179 register int i; 180 register int c; 181 register int vflag; 182 register char *cutarg; 183 register long cutloyear = ZDUMP_LO_YEAR; 184 register long cuthiyear = ZDUMP_HI_YEAR; 185 register time_t cutlotime; 186 register time_t cuthitime; 187 time_t now; 188 time_t t; 189 time_t newt; 190 struct tm tm; 191 struct tm newtm; 192 register struct tm *tmp; 193 register struct tm *newtmp; 194 195 INITIALIZE(cutlotime); 196 INITIALIZE(cuthitime); 197 198 (void) setlocale(LC_ALL, ""); 199 #if !defined(TEXT_DOMAIN) /* Should be defined by cc -D */ 200 #define TEXT_DOMAIN "SYS_TEST" /* Use this only if it weren't */ 201 #endif 202 (void) textdomain(TEXT_DOMAIN); 203 204 progname = argv[0]; 205 for (i = 1; i < argc; ++i) 206 if (strcmp(argv[i], "--version") == 0) { 207 (void) printf("%s\n", elsieid); 208 exit(EXIT_SUCCESS); 209 } 210 vflag = 0; 211 cutarg = NULL; 212 while ((c = getopt(argc, argv, "c:v")) == 'c' || c == 'v') 213 if (c == 'v') 214 vflag = 1; 215 else cutarg = optarg; 216 if (c != EOF || 217 (optind == argc - 1 && strcmp(argv[optind], "=") == 0)) { 218 usage(); 219 /* NOTREACHED */ 220 } 221 if (vflag) { 222 if (cutarg != NULL) { 223 long lo; 224 long hi; 225 char dummy; 226 227 if (sscanf(cutarg, "%ld%c", &hi, &dummy) == 1) { 228 cuthiyear = hi; 229 } else if (sscanf(cutarg, "%ld,%ld%c", 230 &lo, &hi, &dummy) == 2) { 231 cutloyear = lo; 232 cuthiyear = hi; 233 } else { 234 (void) fprintf(stderr, gettext("%s: wild -c argument %s\n"), 235 progname, cutarg); 236 exit(EXIT_FAILURE); 237 } 238 } 239 setabsolutes(); 240 cutlotime = yeartot(cutloyear); 241 cuthitime = yeartot(cuthiyear); 242 } 243 (void) time(&now); 244 longest = 0; 245 for (i = optind; i < argc; ++i) 246 if (strlen(argv[i]) > longest) 247 longest = strlen(argv[i]); 248 249 for (i = optind; i < argc; ++i) { 250 static char buf[MAX_STRING_LENGTH]; 251 static char *tzp = NULL; 252 253 (void) unsetenv("TZ"); 254 if (tzp != NULL) 255 free(tzp); 256 if ((tzp = malloc(3 + strlen(argv[i]) + 1)) == NULL) { 257 perror(progname); 258 exit(EXIT_FAILURE); 259 } 260 (void) strcpy(tzp, "TZ="); 261 (void) strcat(tzp, argv[i]); 262 if (putenv(tzp) != 0) { 263 perror(progname); 264 exit(EXIT_FAILURE); 265 } 266 if (!vflag) { 267 show(argv[i], now, FALSE); 268 continue; 269 } 270 271 #if defined(sun) 272 /* 273 * We show the current time first, probably because we froze 274 * the behavior of zdump some time ago and then it got 275 * changed. 276 */ 277 show(argv[i], now, TRUE); 278 #endif 279 warned = FALSE; 280 t = absolute_min_time; 281 show(argv[i], t, TRUE); 282 t += SECSPERHOUR * HOURSPERDAY; 283 show(argv[i], t, TRUE); 284 if (t < cutlotime) 285 t = cutlotime; 286 tmp = my_localtime(&t); 287 if (tmp != NULL) { 288 tm = *tmp; 289 (void) strncpy(buf, abbr(&tm), sizeof (buf) - 1); 290 } 291 for (;;) { 292 if (t >= cuthitime) 293 break; 294 /* check if newt will overrun maximum time_t value */ 295 if (t > LONG_MAX - (SECSPERHOUR * 12)) 296 break; 297 newt = t + SECSPERHOUR * 12; 298 if (newt >= cuthitime) 299 break; 300 newtmp = localtime(&newt); 301 if (newtmp != NULL) 302 newtm = *newtmp; 303 if ((tmp == NULL || newtmp == NULL) ? (tmp != newtmp) : 304 (delta(&newtm, &tm) != (newt - t) || 305 newtm.tm_isdst != tm.tm_isdst || 306 strcmp(abbr(&newtm), buf) != 0)) { 307 newt = hunt(argv[i], t, newt); 308 newtmp = localtime(&newt); 309 if (newtmp != NULL) { 310 newtm = *newtmp; 311 (void) strncpy(buf, 312 abbr(&newtm), 313 sizeof (buf) - 1); 314 } 315 } 316 t = newt; 317 tm = newtm; 318 tmp = newtmp; 319 } 320 t = absolute_max_time; 321 #if defined(sun) 322 show(argv[i], t, TRUE); 323 t -= SECSPERHOUR * HOURSPERDAY; 324 show(argv[i], t, TRUE); 325 #else /* !defined(sun) */ 326 t -= SECSPERHOUR * HOURSPERDAY; 327 show(argv[i], t, TRUE); 328 t += SECSPERHOUR * HOURSPERDAY; 329 show(argv[i], t, TRUE); 330 #endif /* !defined(sun) */ 331 } 332 if (fflush(stdout) || ferror(stdout)) { 333 (void) fprintf(stderr, "%s: ", progname); 334 (void) perror(gettext("Error writing standard output")); 335 exit(EXIT_FAILURE); 336 } 337 return (EXIT_SUCCESS); 338 } 339 340 static void 341 setabsolutes() 342 { 343 #if defined(sun) 344 absolute_min_time = LONG_MIN; 345 absolute_max_time = LONG_MAX; 346 #else 347 if (0.5 == (time_t)0.5) { 348 /* 349 * time_t is floating. 350 */ 351 if (sizeof (time_t) == sizeof (float)) { 352 absolute_min_time = (time_t)-FLT_MAX; 353 absolute_max_time = (time_t)FLT_MAX; 354 } else if (sizeof (time_t) == sizeof (double)) { 355 absolute_min_time = (time_t)-DBL_MAX; 356 absolute_max_time = (time_t)DBL_MAX; 357 } else { 358 (void) fprintf(stderr, gettext("%s: use of -v on " 359 "system with floating time_t other than float " 360 "or double\n"), progname); 361 exit(EXIT_FAILURE); 362 } 363 } else 364 /*CONSTANTCONDITION*/ 365 if (0 > (time_t)-1) { 366 /* 367 * time_t is signed. 368 */ 369 register time_t hibit; 370 371 for (hibit = 1; (hibit * 2) != 0; hibit *= 2) 372 continue; 373 absolute_min_time = hibit; 374 absolute_max_time = -(hibit + 1); 375 } else { 376 /* 377 * time_t is unsigned. 378 */ 379 absolute_min_time = 0; 380 absolute_max_time = absolute_min_time - 1; 381 } 382 #endif 383 } 384 385 static time_t 386 yeartot(y) 387 const long y; 388 { 389 register long myy; 390 register long seconds; 391 register time_t t; 392 393 myy = EPOCH_YEAR; 394 t = 0; 395 while (myy != y) { 396 if (myy < y) { 397 seconds = isleap(myy) ? SECSPERLYEAR : SECSPERNYEAR; 398 ++myy; 399 if (t > absolute_max_time - seconds) { 400 t = absolute_max_time; 401 break; 402 } 403 t += seconds; 404 } else { 405 --myy; 406 seconds = isleap(myy) ? SECSPERLYEAR : SECSPERNYEAR; 407 if (t < absolute_min_time + seconds) { 408 t = absolute_min_time; 409 break; 410 } 411 t -= seconds; 412 } 413 } 414 return (t); 415 } 416 417 static time_t 418 hunt(name, lot, hit) 419 char *name; 420 time_t lot; 421 time_t hit; 422 { 423 time_t t; 424 long diff; 425 struct tm lotm; 426 register struct tm *lotmp; 427 struct tm tm; 428 register struct tm *tmp; 429 char loab[MAX_STRING_LENGTH]; 430 431 lotmp = my_localtime(&lot); 432 if (lotmp != NULL) { 433 lotm = *lotmp; 434 (void) strncpy(loab, abbr(&lotm), sizeof (loab) - 1); 435 } 436 for (;;) { 437 diff = (long)(hit - lot); 438 if (diff < 2) 439 break; 440 t = lot; 441 t += diff / 2; 442 if (t <= lot) 443 ++t; 444 else if (t >= hit) 445 --t; 446 tmp = my_localtime(&t); 447 if (tmp != NULL) 448 tm = *tmp; 449 if ((lotmp == NULL || tmp == NULL) ? (lotmp == tmp) : 450 (delta(&tm, &lotm) == (t - lot) && 451 tm.tm_isdst == lotm.tm_isdst && 452 strcmp(abbr(&tm), loab) == 0)) { 453 lot = t; 454 lotm = tm; 455 lotmp = tmp; 456 } else hit = t; 457 } 458 show(name, lot, TRUE); 459 show(name, hit, TRUE); 460 return (hit); 461 } 462 463 /* 464 * Thanks to Paul Eggert for logic used in delta. 465 */ 466 467 static long 468 delta(newp, oldp) 469 struct tm *newp; 470 struct tm *oldp; 471 { 472 register long result; 473 register int tmy; 474 475 if (newp->tm_year < oldp->tm_year) 476 return (-delta(oldp, newp)); 477 result = 0; 478 for (tmy = oldp->tm_year; tmy < newp->tm_year; ++tmy) 479 result += DAYSPERNYEAR + isleap_sum(tmy, TM_YEAR_BASE); 480 result += newp->tm_yday - oldp->tm_yday; 481 result *= HOURSPERDAY; 482 result += newp->tm_hour - oldp->tm_hour; 483 result *= MINSPERHOUR; 484 result += newp->tm_min - oldp->tm_min; 485 result *= SECSPERMIN; 486 result += newp->tm_sec - oldp->tm_sec; 487 return (result); 488 } 489 490 static void 491 show(zone, t, v) 492 char *zone; 493 time_t t; 494 int v; 495 { 496 register struct tm *tmp; 497 498 (void) printf("%-*s ", (int)longest, zone); 499 if (v) { 500 tmp = gmtime(&t); 501 if (tmp == NULL) { 502 (void) printf(tformat(), t); 503 } else { 504 dumptime(tmp); 505 (void) printf(" UTC"); 506 } 507 (void) printf(" = "); 508 } 509 tmp = my_localtime(&t); 510 dumptime(tmp); 511 if (tmp != NULL) { 512 if (*abbr(tmp) != '\0') 513 (void) printf(" %s", abbr(tmp)); 514 if (v) { 515 (void) printf(" isdst=%d", tmp->tm_isdst); 516 #ifdef TM_GMTOFF 517 (void) printf(" gmtoff=%ld", tmp->TM_GMTOFF); 518 #endif /* defined TM_GMTOFF */ 519 } 520 } 521 (void) printf("\n"); 522 if (tmp != NULL && *abbr(tmp) != '\0') 523 abbrok(abbr(tmp), zone); 524 } 525 526 static char * 527 abbr(tmp) 528 struct tm *tmp; 529 { 530 register char *result; 531 static char nada; 532 533 if (tmp->tm_isdst != 0 && tmp->tm_isdst != 1) 534 return (&nada); 535 result = tzname[tmp->tm_isdst]; 536 return ((result == NULL) ? &nada : result); 537 } 538 539 /* 540 * The code below can fail on certain theoretical systems; 541 * it works on all known real-world systems as of 2004-12-30. 542 */ 543 544 static const char * 545 tformat() 546 { 547 #if defined(sun) 548 /* time_t is signed long */ 549 return ("%ld"); 550 #else 551 /*CONSTANTCONDITION*/ 552 if (0.5 == (time_t)0.5) { /* floating */ 553 /*CONSTANTCONDITION*/ 554 if (sizeof (time_t) > sizeof (double)) 555 return ("%Lg"); 556 return ("%g"); 557 } 558 /*CONSTANTCONDITION*/ 559 if (0 > (time_t)-1) { /* signed */ 560 /*CONSTANTCONDITION*/ 561 if (sizeof (time_t) > sizeof (long)) 562 return ("%lld"); 563 /*CONSTANTCONDITION*/ 564 if (sizeof (time_t) > sizeof (int)) 565 return ("%ld"); 566 return ("%d"); 567 } 568 /*CONSTANTCONDITION*/ 569 if (sizeof (time_t) > sizeof (unsigned long)) 570 return ("%llu"); 571 /*CONSTANTCONDITION*/ 572 if (sizeof (time_t) > sizeof (unsigned int)) 573 return ("%lu"); 574 return ("%u"); 575 #endif 576 } 577 578 static void 579 dumptime(timeptr) 580 register const struct tm *timeptr; 581 { 582 static const char wday_name[][3] = { 583 "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat" 584 }; 585 static const char mon_name[][3] = { 586 "Jan", "Feb", "Mar", "Apr", "May", "Jun", 587 "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" 588 }; 589 register const char *wn; 590 register const char *mn; 591 register int lead; 592 register int trail; 593 594 if (timeptr == NULL) { 595 (void) printf("NULL"); 596 return; 597 } 598 /* 599 * The packaged versions of localtime and gmtime never put out-of-range 600 * values in tm_wday or tm_mon, but since this code might be compiled 601 * with other (perhaps experimental) versions, paranoia is in order. 602 */ 603 if (timeptr->tm_wday < 0 || timeptr->tm_wday >= 604 (int)(sizeof (wday_name) / sizeof (wday_name[0]))) 605 wn = "???"; 606 else wn = wday_name[timeptr->tm_wday]; 607 if (timeptr->tm_mon < 0 || timeptr->tm_mon >= 608 (int)(sizeof (mon_name) / sizeof (mon_name[0]))) 609 mn = "???"; 610 else mn = mon_name[timeptr->tm_mon]; 611 (void) printf("%.3s %.3s%3d %.2d:%.2d:%.2d ", 612 wn, mn, 613 timeptr->tm_mday, timeptr->tm_hour, 614 timeptr->tm_min, timeptr->tm_sec); 615 #define DIVISOR 10 616 trail = timeptr->tm_year % DIVISOR + TM_YEAR_BASE % DIVISOR; 617 lead = timeptr->tm_year / DIVISOR + TM_YEAR_BASE / DIVISOR + 618 trail / DIVISOR; 619 trail %= DIVISOR; 620 if (trail < 0 && lead > 0) { 621 trail += DIVISOR; 622 --lead; 623 } else if (lead < 0 && trail > 0) { 624 trail -= DIVISOR; 625 ++lead; 626 } 627 if (lead == 0) 628 (void) printf("%d", trail); 629 else 630 (void) printf("%d%d", lead, ((trail < 0) ? -trail : trail)); 631 } 632 633 static void 634 usage() 635 { 636 (void) fprintf(stderr, gettext( 637 "%s: [ --version ] [ -v ] [ -c [loyear,]hiyear ] zonename ...\n"), 638 progname); 639 exit(EXIT_FAILURE); 640 /* NOTREACHED */ 641 } 642