1 /* 2 ** This file is in the public domain, so clarified as of 3 ** 2006-07-17 by Arthur David Olson. 4 ** 5 ** $FreeBSD: src/usr.sbin/zic/zic.c,v 1.11 1999/08/28 01:21:20 peter Exp $ 6 */ 7 8 #include <err.h> 9 #include <locale.h> 10 #include <sys/stat.h> /* for umask manifest constants */ 11 #include <sys/types.h> 12 #include <unistd.h> 13 #include "private.h" 14 #include "tzfile.h" 15 16 #include <stdarg.h> 17 18 #define ZIC_VERSION_PRE_2013 '2' 19 #define ZIC_VERSION '3' 20 21 typedef int_fast64_t zic_t; 22 #define ZIC_MIN INT_FAST64_MIN 23 #define ZIC_MAX INT_FAST64_MAX 24 #define SCNdZIC SCNdFAST64 25 26 #ifndef ZIC_MAX_ABBR_LEN_WO_WARN 27 #define ZIC_MAX_ABBR_LEN_WO_WARN 6 28 #endif /* !defined ZIC_MAX_ABBR_LEN_WO_WARN */ 29 30 #define MKDIR_UMASK (S_IRUSR|S_IWUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH) 31 32 /* 33 ** On some ancient hosts, predicates like `isspace(C)' are defined 34 ** only if isascii(C) || C == EOF. Modern hosts obey the C Standard, 35 ** which says they are defined only if C == ((unsigned char) C) || C == EOF. 36 ** Neither the C Standard nor Posix require that `isascii' exist. 37 ** For portability, we check both ancient and modern requirements. 38 ** If isascii is not defined, the isascii check succeeds trivially. 39 */ 40 #include "ctype.h" 41 #ifndef isascii 42 #define isascii(x) 1 43 #endif 44 45 #define end(cp) (strchr((cp), '\0')) 46 47 struct rule { 48 const char * r_filename; 49 int r_linenum; 50 const char * r_name; 51 52 zic_t r_loyear; /* for example, 1986 */ 53 zic_t r_hiyear; /* for example, 1986 */ 54 const char * r_yrtype; 55 int r_lowasnum; 56 int r_hiwasnum; 57 58 int r_month; /* 0..11 */ 59 60 int r_dycode; /* see below */ 61 int r_dayofmonth; 62 int r_wday; 63 64 zic_t r_tod; /* time from midnight */ 65 int r_todisstd; /* above is standard time if TRUE */ 66 /* or wall clock time if FALSE */ 67 int r_todisgmt; /* above is GMT if TRUE */ 68 /* or local time if FALSE */ 69 zic_t r_stdoff; /* offset from standard time */ 70 const char * r_abbrvar; /* variable part of abbreviation */ 71 72 int r_todo; /* a rule to do (used in outzone) */ 73 zic_t r_temp; /* used in outzone */ 74 }; 75 76 /* 77 ** r_dycode r_dayofmonth r_wday 78 */ 79 80 #define DC_DOM 0 /* 1..31 */ /* unused */ 81 #define DC_DOWGEQ 1 /* 1..31 */ /* 0..6 (Sun..Sat) */ 82 #define DC_DOWLEQ 2 /* 1..31 */ /* 0..6 (Sun..Sat) */ 83 84 struct zone { 85 const char * z_filename; 86 int z_linenum; 87 88 const char * z_name; 89 zic_t z_gmtoff; 90 const char * z_rule; 91 const char * z_format; 92 93 zic_t z_stdoff; 94 95 struct rule * z_rules; 96 int z_nrules; 97 98 struct rule z_untilrule; 99 zic_t z_untiltime; 100 }; 101 102 static void addtt(zic_t starttime, int type); 103 static int addtype(zic_t gmtoff, const char *abbr, int isdst, 104 int ttisstd, int ttisgmt); 105 static void leapadd(zic_t t, int positive, int rolling, int count); 106 static void adjleap(void); 107 static void associate(void); 108 static void dolink(const char *fromfield, const char *tofield); 109 static char ** getfields(char *buf); 110 static zic_t gethms(const char *string, const char *errstrng, 111 int signable); 112 static void infile(const char *filename); 113 static void inleap(char **fields, int nfields); 114 static void inlink(char **fields, int nfields); 115 static void inrule(char **fields, int nfields); 116 static int inzcont(char **fields, int nfields); 117 static int inzone(char **fields, int nfields); 118 static int inzsub(char **fields, int nfields, int iscont); 119 static int itsdir(const char *name); 120 static int lowerit(int c); 121 static int mkdirs(char *filename); 122 static void newabbr(const char *abbr); 123 static zic_t oadd(zic_t t1, zic_t t2); 124 static void outzone(const struct zone *zp, int ntzones); 125 static zic_t rpytime(const struct rule *rp, zic_t wantedy); 126 static void rulesub(struct rule *rp, 127 const char *loyearp, const char *hiyearp, 128 const char *typep, const char *monthp, 129 const char *dayp, const char *timep); 130 static void setgroup(gid_t *flag, const char *name); 131 static void setuser(uid_t *flag, const char *name); 132 static zic_t tadd(const zic_t t1, const zic_t t2); 133 static int yearistype(int year, const char *type); 134 135 static int charcnt; 136 static int errors; 137 static const char * filename; 138 static int leapcnt; 139 static int leapseen; 140 static zic_t leapminyear; 141 static zic_t leapmaxyear; 142 static int linenum; 143 static int max_abbrvar_len; 144 static int max_format_len; 145 static zic_t max_year; 146 static zic_t min_year; 147 static int noise; 148 static const char * rfilename; 149 static int rlinenum; 150 static int timecnt; 151 static int typecnt; 152 153 /* 154 ** Line codes. 155 */ 156 157 #define LC_RULE 0 158 #define LC_ZONE 1 159 #define LC_LINK 2 160 #define LC_LEAP 3 161 162 /* 163 ** Which fields are which on a Zone line. 164 */ 165 166 #define ZF_NAME 1 167 #define ZF_GMTOFF 2 168 #define ZF_RULE 3 169 #define ZF_FORMAT 4 170 #define ZF_TILYEAR 5 171 #define ZF_TILMONTH 6 172 #define ZF_TILDAY 7 173 #define ZF_TILTIME 8 174 #define ZONE_MINFIELDS 5 175 #define ZONE_MAXFIELDS 9 176 177 /* 178 ** Which fields are which on a Zone continuation line. 179 */ 180 181 #define ZFC_GMTOFF 0 182 #define ZFC_RULE 1 183 #define ZFC_FORMAT 2 184 #define ZFC_TILYEAR 3 185 #define ZFC_TILMONTH 4 186 #define ZFC_TILDAY 5 187 #define ZFC_TILTIME 6 188 #define ZONEC_MINFIELDS 3 189 #define ZONEC_MAXFIELDS 7 190 191 /* 192 ** Which files are which on a Rule line. 193 */ 194 195 #define RF_NAME 1 196 #define RF_LOYEAR 2 197 #define RF_HIYEAR 3 198 #define RF_COMMAND 4 199 #define RF_MONTH 5 200 #define RF_DAY 6 201 #define RF_TOD 7 202 #define RF_STDOFF 8 203 #define RF_ABBRVAR 9 204 #define RULE_FIELDS 10 205 206 /* 207 ** Which fields are which on a Link line. 208 */ 209 210 #define LF_FROM 1 211 #define LF_TO 2 212 #define LINK_FIELDS 3 213 214 /* 215 ** Which fields are which on a Leap line. 216 */ 217 218 #define LP_YEAR 1 219 #define LP_MONTH 2 220 #define LP_DAY 3 221 #define LP_TIME 4 222 #define LP_CORR 5 223 #define LP_ROLL 6 224 #define LEAP_FIELDS 7 225 226 /* 227 ** Year synonyms. 228 */ 229 230 #define YR_MINIMUM 0 231 #define YR_MAXIMUM 1 232 #define YR_ONLY 2 233 234 static struct rule * rules; 235 static int nrules; /* number of rules */ 236 237 static struct zone * zones; 238 static int nzones; /* number of zones */ 239 240 struct link { 241 const char * l_filename; 242 int l_linenum; 243 const char * l_from; 244 const char * l_to; 245 }; 246 247 static struct link * links; 248 static int nlinks; 249 250 struct lookup { 251 const char * l_word; 252 const int l_value; 253 }; 254 255 static struct lookup const *byword(const char *string, 256 const struct lookup *lp); 257 258 static struct lookup const line_codes[] = { 259 { "Rule", LC_RULE }, 260 { "Zone", LC_ZONE }, 261 { "Link", LC_LINK }, 262 { "Leap", LC_LEAP }, 263 { NULL, 0} 264 }; 265 266 static struct lookup const mon_names[] = { 267 { "January", TM_JANUARY }, 268 { "February", TM_FEBRUARY }, 269 { "March", TM_MARCH }, 270 { "April", TM_APRIL }, 271 { "May", TM_MAY }, 272 { "June", TM_JUNE }, 273 { "July", TM_JULY }, 274 { "August", TM_AUGUST }, 275 { "September", TM_SEPTEMBER }, 276 { "October", TM_OCTOBER }, 277 { "November", TM_NOVEMBER }, 278 { "December", TM_DECEMBER }, 279 { NULL, 0 } 280 }; 281 282 static struct lookup const wday_names[] = { 283 { "Sunday", TM_SUNDAY }, 284 { "Monday", TM_MONDAY }, 285 { "Tuesday", TM_TUESDAY }, 286 { "Wednesday", TM_WEDNESDAY }, 287 { "Thursday", TM_THURSDAY }, 288 { "Friday", TM_FRIDAY }, 289 { "Saturday", TM_SATURDAY }, 290 { NULL, 0 } 291 }; 292 293 static struct lookup const lasts[] = { 294 { "last-Sunday", TM_SUNDAY }, 295 { "last-Monday", TM_MONDAY }, 296 { "last-Tuesday", TM_TUESDAY }, 297 { "last-Wednesday", TM_WEDNESDAY }, 298 { "last-Thursday", TM_THURSDAY }, 299 { "last-Friday", TM_FRIDAY }, 300 { "last-Saturday", TM_SATURDAY }, 301 { NULL, 0 } 302 }; 303 304 static struct lookup const begin_years[] = { 305 { "minimum", YR_MINIMUM }, 306 { "maximum", YR_MAXIMUM }, 307 { NULL, 0 } 308 }; 309 310 static struct lookup const end_years[] = { 311 { "minimum", YR_MINIMUM }, 312 { "maximum", YR_MAXIMUM }, 313 { "only", YR_ONLY }, 314 { NULL, 0 } 315 }; 316 317 static struct lookup const leap_types[] = { 318 { "Rolling", TRUE }, 319 { "Stationary", FALSE }, 320 { NULL, 0 } 321 }; 322 323 static const int len_months[2][MONSPERYEAR] = { 324 { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }, 325 { 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 } 326 }; 327 328 static const int len_years[2] = { 329 DAYSPERNYEAR, DAYSPERLYEAR 330 }; 331 332 static struct attype { 333 zic_t at; 334 unsigned char type; 335 } attypes[TZ_MAX_TIMES]; 336 static zic_t gmtoffs[TZ_MAX_TYPES]; 337 static char isdsts[TZ_MAX_TYPES]; 338 static unsigned char abbrinds[TZ_MAX_TYPES]; 339 static char ttisstds[TZ_MAX_TYPES]; 340 static char ttisgmts[TZ_MAX_TYPES]; 341 static char chars[TZ_MAX_CHARS]; 342 static zic_t trans[TZ_MAX_LEAPS]; 343 static zic_t corr[TZ_MAX_LEAPS]; 344 static char roll[TZ_MAX_LEAPS]; 345 346 /* 347 ** Memory allocation. 348 */ 349 350 static __pure void * 351 memcheck(void* const ptr) 352 { 353 if (ptr == NULL) 354 errx(EXIT_FAILURE, _("memory exhausted")); 355 return ptr; 356 } 357 358 #define emalloc(size) memcheck(malloc(size)) 359 #define erealloc(ptr, size) memcheck(realloc(ptr, size)) 360 #define ecpyalloc(ptr) memcheck(icpyalloc(ptr)) 361 #define ecatalloc(oldp, newp) memcheck(icatalloc((oldp), (newp))) 362 363 /* 364 ** Error handling. 365 */ 366 367 static void 368 eats(const char * const name, const int num, 369 const char * const rname, const int rnum) 370 { 371 filename = name; 372 linenum = num; 373 rfilename = rname; 374 rlinenum = rnum; 375 } 376 377 static void 378 eat(const char * const name, const int num) 379 { 380 eats(name, num, NULL, -1); 381 } 382 383 static void __printflike(1, 0) 384 verror(const char * const string, va_list args) 385 { 386 /* 387 ** Match the format of "cc" to allow sh users to 388 ** zic ... 2>&1 | error -t "*" -v 389 ** on BSD systems. 390 */ 391 fprintf(stderr, _("\"%s\", line %d: "), filename, linenum); 392 vfprintf(stderr, string, args); 393 if (rfilename != NULL) 394 fprintf(stderr, _(" (rule from \"%s\", line %d)"), 395 rfilename, rlinenum); 396 fprintf(stderr, "\n"); 397 ++errors; 398 } 399 400 static void __printflike(1, 2) 401 error(const char * const string, ...) 402 { 403 va_list args; 404 va_start(args, string); 405 verror(string, args); 406 va_end(args); 407 } 408 409 static void __printflike(1, 2) 410 warning(const char * const string, ...) 411 { 412 va_list args; 413 fprintf(stderr, _("warning: ")); 414 va_start(args, string); 415 verror(string, args); 416 va_end(args); 417 --errors; 418 } 419 420 static _Noreturn void 421 usage(void) 422 { 423 fprintf(stderr, "%s\n%s\n", 424 _("usage: zic [-v] [-l localtime] [-p posixrules] [-d directory]"), 425 _(" [-L leapseconds] [-y yearistype] [filename ...]")); 426 exit(EXIT_FAILURE); 427 } 428 429 static const char * psxrules; 430 static const char * lcltime; 431 static const char * directory; 432 static const char * leapsec; 433 static const char * yitcommand; 434 static int Dflag; 435 static uid_t uflag = (uid_t)-1; 436 static gid_t gflag = (gid_t)-1; 437 static mode_t mflag = (S_IRUSR | S_IRGRP | S_IROTH 438 | S_IWUSR); 439 440 int 441 main(int argc, char *argv[]) 442 { 443 int i; 444 int j; 445 int c; 446 447 umask(umask(S_IWGRP | S_IWOTH) | (S_IWGRP | S_IWOTH)); 448 while ((c = getopt(argc, argv, "Dd:g:l:m:p:L:u:vsy:")) != -1) 449 switch (c) { 450 default: 451 usage(); 452 case 'D': 453 Dflag = 1; 454 break; 455 case 'd': 456 if (directory == NULL) 457 directory = optarg; 458 else 459 errx(EXIT_FAILURE, 460 _("more than one -d option specified")); 461 break; 462 case 'g': 463 setgroup(&gflag, optarg); 464 break; 465 case 'l': 466 if (lcltime == NULL) 467 lcltime = optarg; 468 else 469 errx(EXIT_FAILURE, 470 _("more than one -l option specified")); 471 break; 472 case 'm': 473 { 474 void *set = setmode(optarg); 475 getmode(set, mflag); 476 break; 477 } 478 case 'p': 479 if (psxrules == NULL) 480 psxrules = optarg; 481 else 482 errx(EXIT_FAILURE, 483 _("more than one -p option specified")); 484 break; 485 case 'u': 486 setuser(&uflag, optarg); 487 break; 488 case 'y': 489 if (yitcommand == NULL) 490 yitcommand = optarg; 491 else 492 errx(EXIT_FAILURE, 493 _("more than one -y option specified")); 494 break; 495 case 'L': 496 if (leapsec == NULL) 497 leapsec = optarg; 498 else 499 errx(EXIT_FAILURE, 500 _("more than one -L option specified")); 501 break; 502 case 'v': 503 noise = TRUE; 504 break; 505 case 's': 506 warnx(_("-s ignored\n")); 507 break; 508 } 509 if (optind == argc - 1 && strcmp(argv[optind], "=") == 0) 510 usage(); /* usage message by request */ 511 if (directory == NULL) 512 directory = TZDIR; 513 if (yitcommand == NULL) 514 yitcommand = "yearistype"; 515 516 if (optind < argc && leapsec != NULL) { 517 infile(leapsec); 518 adjleap(); 519 } 520 521 for (i = optind; i < argc; ++i) 522 infile(argv[i]); 523 if (errors) 524 exit(EXIT_FAILURE); 525 associate(); 526 for (i = 0; i < nzones; i = j) { 527 /* 528 ** Find the next non-continuation zone entry. 529 */ 530 for (j = i + 1; j < nzones && zones[j].z_name == NULL; ++j) 531 continue; 532 outzone(&zones[i], j - i); 533 } 534 /* 535 ** Make links. 536 */ 537 for (i = 0; i < nlinks; ++i) { 538 eat(links[i].l_filename, links[i].l_linenum); 539 dolink(links[i].l_from, links[i].l_to); 540 if (noise) 541 for (j = 0; j < nlinks; ++j) 542 if (strcmp(links[i].l_to, 543 links[j].l_from) == 0) 544 warning(_("link to link")); 545 } 546 if (lcltime != NULL) { 547 eat("command line", 1); 548 dolink(lcltime, TZDEFAULT); 549 } 550 if (psxrules != NULL) { 551 eat("command line", 1); 552 dolink(psxrules, TZDEFRULES); 553 } 554 return (errors == 0) ? EXIT_SUCCESS : EXIT_FAILURE; 555 } 556 557 static void 558 dolink(const char * const fromfield, const char * const tofield) 559 { 560 char *fromname; 561 char *toname; 562 563 if (fromfield[0] == '/') 564 fromname = ecpyalloc(fromfield); 565 else { 566 fromname = ecpyalloc(directory); 567 fromname = ecatalloc(fromname, "/"); 568 fromname = ecatalloc(fromname, fromfield); 569 } 570 if (tofield[0] == '/') 571 toname = ecpyalloc(tofield); 572 else { 573 toname = ecpyalloc(directory); 574 toname = ecatalloc(toname, "/"); 575 toname = ecatalloc(toname, tofield); 576 } 577 /* 578 ** We get to be careful here since 579 ** there's a fair chance of root running us. 580 */ 581 if (!itsdir(toname)) 582 remove(toname); 583 if (link(fromname, toname) != 0 584 && access(fromname, F_OK) == 0 && !itsdir(fromname)) { 585 int result; 586 587 if (mkdirs(toname) != 0) 588 exit(EXIT_FAILURE); 589 590 result = link(fromname, toname); 591 if (result != 0) { 592 const char *s = fromfield; 593 const char *t; 594 char * symlinkcontents = NULL; 595 596 do 597 t = s; 598 while ((s = strchr(s, '/')) 599 && ! strncmp (fromfield, tofield, 600 ++s - fromfield)); 601 602 for (s = tofield + (t - fromfield); 603 (s = strchr(s, '/')); 604 s++) 605 symlinkcontents = 606 ecatalloc(symlinkcontents, 607 "../"); 608 symlinkcontents = ecatalloc(symlinkcontents, t); 609 result = symlink(symlinkcontents, toname); 610 if (result == 0) 611 warning(_("hard link failed, symbolic link used")); 612 free(symlinkcontents); 613 } 614 if (result != 0) { 615 FILE *fp, *tp; 616 int c; 617 fp = fopen(fromname, "rb"); 618 if (!fp) 619 err(EXIT_FAILURE, _("Can't read %s"), fromname); 620 tp = fopen(toname, "wb"); 621 if (!tp) 622 err(EXIT_FAILURE, _("Can't create %s"), toname); 623 while ((c = getc(fp)) != EOF) 624 putc(c, tp); 625 if (ferror(fp) || fclose(fp)) 626 err(EXIT_FAILURE, _("Error reading %s"), 627 fromname); 628 if (ferror(tp) || fclose(tp)) 629 err(EXIT_FAILURE, _("Error writing %s"), 630 toname); 631 warning(_("link failed, copy used")); 632 } 633 } 634 free(fromname); 635 free(toname); 636 } 637 638 #define TIME_T_BITS_IN_FILE 64 639 640 static const zic_t min_time = (zic_t) -1 << (TIME_T_BITS_IN_FILE - 1); 641 static const zic_t max_time = -1 - ((zic_t) -1 << (TIME_T_BITS_IN_FILE - 1)); 642 643 static int 644 itsdir(const char * const name) 645 { 646 char * myname; 647 int accres; 648 649 myname = ecpyalloc(name); 650 myname = ecatalloc(myname, "/."); 651 accres = access(myname, F_OK); 652 free(myname); 653 return accres == 0; 654 } 655 656 /* 657 ** Associate sets of rules with zones. 658 */ 659 660 /* 661 ** Sort by rule name. 662 */ 663 664 static int 665 rcomp(const void *cp1, const void *cp2) 666 { 667 return strcmp(((const struct rule *) cp1)->r_name, 668 ((const struct rule *) cp2)->r_name); 669 } 670 671 static void 672 associate(void) 673 { 674 struct zone *zp; 675 struct rule *rp; 676 int base, out; 677 int i, j; 678 679 if (nrules != 0) { 680 qsort(rules, nrules,sizeof *rules, rcomp); 681 for (i = 0; i < nrules - 1; ++i) { 682 if (strcmp(rules[i].r_name, 683 rules[i + 1].r_name) != 0) 684 continue; 685 if (strcmp(rules[i].r_filename, 686 rules[i + 1].r_filename) == 0) 687 continue; 688 eat(rules[i].r_filename, rules[i].r_linenum); 689 warning(_("same rule name in multiple files")); 690 eat(rules[i + 1].r_filename, rules[i + 1].r_linenum); 691 warning(_("same rule name in multiple files")); 692 for (j = i + 2; j < nrules; ++j) { 693 if (strcmp(rules[i].r_name, 694 rules[j].r_name) != 0) 695 break; 696 if (strcmp(rules[i].r_filename, 697 rules[j].r_filename) == 0) 698 continue; 699 if (strcmp(rules[i + 1].r_filename, 700 rules[j].r_filename) == 0) 701 continue; 702 break; 703 } 704 i = j - 1; 705 } 706 } 707 for (i = 0; i < nzones; ++i) { 708 zp = &zones[i]; 709 zp->z_rules = NULL; 710 zp->z_nrules = 0; 711 } 712 for (base = 0; base < nrules; base = out) { 713 rp = &rules[base]; 714 for (out = base + 1; out < nrules; ++out) 715 if (strcmp(rp->r_name, rules[out].r_name) != 0) 716 break; 717 for (i = 0; i < nzones; ++i) { 718 zp = &zones[i]; 719 if (strcmp(zp->z_rule, rp->r_name) != 0) 720 continue; 721 zp->z_rules = rp; 722 zp->z_nrules = out - base; 723 } 724 } 725 for (i = 0; i < nzones; ++i) { 726 zp = &zones[i]; 727 if (zp->z_nrules == 0) { 728 /* 729 ** Maybe we have a local standard time offset. 730 */ 731 eat(zp->z_filename, zp->z_linenum); 732 zp->z_stdoff = gethms(zp->z_rule, _("unruly zone"), 733 TRUE); 734 /* 735 ** Note, though, that if there's no rule, 736 ** a '%s' in the format is a bad thing. 737 */ 738 if (strchr(zp->z_format, '%') != 0) 739 error("%s", _("%s in ruleless zone")); 740 } 741 } 742 if (errors) 743 exit(EXIT_FAILURE); 744 } 745 746 static void 747 infile(const char *name) 748 { 749 FILE *fp; 750 char **fields; 751 char *cp; 752 const struct lookup *lp; 753 int nfields; 754 int wantcont; 755 int num; 756 char buf[BUFSIZ]; 757 758 if (strcmp(name, "-") == 0) { 759 name = _("standard input"); 760 fp = stdin; 761 } else if ((fp = fopen(name, "r")) == NULL) 762 err(EXIT_FAILURE, _("can't open %s"), name); 763 wantcont = FALSE; 764 for (num = 1; ; ++num) { 765 eat(name, num); 766 if (fgets(buf, sizeof buf, fp) != buf) 767 break; 768 cp = strchr(buf, '\n'); 769 if (cp == NULL) { 770 error(_("line too long")); 771 exit(EXIT_FAILURE); 772 } 773 *cp = '\0'; 774 fields = getfields(buf); 775 nfields = 0; 776 while (fields[nfields] != NULL) { 777 static char nada; 778 779 if (strcmp(fields[nfields], "-") == 0) 780 fields[nfields] = &nada; 781 ++nfields; 782 } 783 if (nfields == 0) { 784 /* nothing to do */ 785 } else if (wantcont) { 786 wantcont = inzcont(fields, nfields); 787 } else { 788 lp = byword(fields[0], line_codes); 789 if (lp == NULL) 790 error(_("input line of unknown type")); 791 else switch ((int) (lp->l_value)) { 792 case LC_RULE: 793 inrule(fields, nfields); 794 wantcont = FALSE; 795 break; 796 case LC_ZONE: 797 wantcont = inzone(fields, nfields); 798 break; 799 case LC_LINK: 800 inlink(fields, nfields); 801 wantcont = FALSE; 802 break; 803 case LC_LEAP: 804 if (name != leapsec) 805 warnx( 806 _("leap line in non leap seconds file %s"), name); 807 else inleap(fields, nfields); 808 wantcont = FALSE; 809 break; 810 default: /* "cannot happen" */ 811 errx(EXIT_FAILURE, 812 _("panic: invalid l_value %d"), lp->l_value); 813 } 814 } 815 free(fields); 816 } 817 if (ferror(fp)) 818 errx(EXIT_FAILURE, _("error reading %s"), filename); 819 if (fp != stdin && fclose(fp)) 820 err(EXIT_FAILURE, _("error closing %s"), filename); 821 if (wantcont) 822 error(_("expected continuation line not found")); 823 } 824 825 /* 826 ** Convert a string of one of the forms 827 ** h -h hh:mm -hh:mm hh:mm:ss -hh:mm:ss 828 ** into a number of seconds. 829 ** A null string maps to zero. 830 ** Call error with errstring and return zero on errors. 831 */ 832 833 static zic_t 834 gethms(const char *string, const char * const errstring, const int signable) 835 { 836 zic_t hh; 837 int mm, ss, sign; 838 839 if (string == NULL || *string == '\0') 840 return 0; 841 if (!signable) 842 sign = 1; 843 else if (*string == '-') { 844 sign = -1; 845 ++string; 846 } else sign = 1; 847 if (sscanf(string, scheck(string, "%"SCNdZIC), &hh) == 1) 848 mm = ss = 0; 849 else if (sscanf(string, scheck(string, "%"SCNdZIC":%d"), &hh, &mm) == 2) 850 ss = 0; 851 else if (sscanf(string, scheck(string, "%"SCNdZIC":%d:%d"), 852 &hh, &mm, &ss) != 3) { 853 error("%s", errstring); 854 return 0; 855 } 856 if (hh < 0 || 857 mm < 0 || mm >= MINSPERHOUR || 858 ss < 0 || ss > SECSPERMIN) { 859 error("%s", errstring); 860 return 0; 861 } 862 if (ZIC_MAX / SECSPERHOUR < hh) { 863 error(_("time overflow")); 864 return 0; 865 } 866 if (noise && hh == HOURSPERDAY && mm == 0 && ss == 0) 867 warning(_("24:00 not handled by pre-1998 versions of zic")); 868 if (noise && (hh > HOURSPERDAY || 869 (hh == HOURSPERDAY && (mm != 0 || ss != 0)))) 870 warning(_("values over 24 hours not handled by pre-2007 versions of zic")); 871 return oadd(sign * hh * SECSPERHOUR, 872 sign * (mm * SECSPERMIN + ss)); 873 } 874 875 static void 876 inrule(char ** const fields, const int nfields) 877 { 878 static struct rule r; 879 880 if (nfields != RULE_FIELDS) { 881 error(_("wrong number of fields on Rule line")); 882 return; 883 } 884 if (*fields[RF_NAME] == '\0') { 885 error(_("nameless rule")); 886 return; 887 } 888 r.r_filename = filename; 889 r.r_linenum = linenum; 890 r.r_stdoff = gethms(fields[RF_STDOFF], _("invalid saved time"), TRUE); 891 rulesub(&r, fields[RF_LOYEAR], fields[RF_HIYEAR], fields[RF_COMMAND], 892 fields[RF_MONTH], fields[RF_DAY], fields[RF_TOD]); 893 r.r_name = ecpyalloc(fields[RF_NAME]); 894 r.r_abbrvar = ecpyalloc(fields[RF_ABBRVAR]); 895 if (max_abbrvar_len < strlen(r.r_abbrvar)) 896 max_abbrvar_len = strlen(r.r_abbrvar); 897 rules = erealloc(rules, (nrules + 1) * sizeof *rules); 898 rules[nrules++] = r; 899 } 900 901 static int 902 inzone(char ** const fields, const int nfields) 903 { 904 int i; 905 906 if (nfields < ZONE_MINFIELDS || nfields > ZONE_MAXFIELDS) { 907 error(_("wrong number of fields on Zone line")); 908 return FALSE; 909 } 910 if (strcmp(fields[ZF_NAME], TZDEFAULT) == 0 && lcltime != NULL) { 911 error( 912 _("\"Zone %s\" line and -l option are mutually exclusive"), 913 TZDEFAULT); 914 return FALSE; 915 } 916 if (strcmp(fields[ZF_NAME], TZDEFRULES) == 0 && psxrules != NULL) { 917 error( 918 _("\"Zone %s\" line and -p option are mutually exclusive"), 919 TZDEFRULES); 920 return FALSE; 921 } 922 for (i = 0; i < nzones; ++i) 923 if (zones[i].z_name != NULL && 924 strcmp(zones[i].z_name, fields[ZF_NAME]) == 0) { 925 error( 926 _("duplicate zone name %s (file \"%s\", line %d)"), 927 fields[ZF_NAME], 928 zones[i].z_filename, 929 zones[i].z_linenum); 930 return FALSE; 931 } 932 return inzsub(fields, nfields, FALSE); 933 } 934 935 static int 936 inzcont(char ** const fields, const int nfields) 937 { 938 if (nfields < ZONEC_MINFIELDS || nfields > ZONEC_MAXFIELDS) { 939 error(_("wrong number of fields on Zone continuation line")); 940 return FALSE; 941 } 942 return inzsub(fields, nfields, TRUE); 943 } 944 945 static int 946 inzsub(char ** const fields, const int nfields, const int iscont) 947 { 948 char *cp; 949 static struct zone z; 950 int i_gmtoff, i_rule, i_format; 951 int i_untilyear, i_untilmonth; 952 int i_untilday, i_untiltime; 953 int hasuntil; 954 955 if (iscont) { 956 i_gmtoff = ZFC_GMTOFF; 957 i_rule = ZFC_RULE; 958 i_format = ZFC_FORMAT; 959 i_untilyear = ZFC_TILYEAR; 960 i_untilmonth = ZFC_TILMONTH; 961 i_untilday = ZFC_TILDAY; 962 i_untiltime = ZFC_TILTIME; 963 z.z_name = NULL; 964 } else { 965 i_gmtoff = ZF_GMTOFF; 966 i_rule = ZF_RULE; 967 i_format = ZF_FORMAT; 968 i_untilyear = ZF_TILYEAR; 969 i_untilmonth = ZF_TILMONTH; 970 i_untilday = ZF_TILDAY; 971 i_untiltime = ZF_TILTIME; 972 z.z_name = ecpyalloc(fields[ZF_NAME]); 973 } 974 z.z_filename = filename; 975 z.z_linenum = linenum; 976 z.z_gmtoff = gethms(fields[i_gmtoff], _("invalid UT offset"), TRUE); 977 if ((cp = strchr(fields[i_format], '%')) != NULL) { 978 if (*++cp != 's' || strchr(cp, '%') != 0) { 979 error(_("invalid abbreviation format")); 980 return FALSE; 981 } 982 } 983 z.z_rule = ecpyalloc(fields[i_rule]); 984 z.z_format = ecpyalloc(fields[i_format]); 985 if (max_format_len < strlen(z.z_format)) 986 max_format_len = strlen(z.z_format); 987 hasuntil = nfields > i_untilyear; 988 if (hasuntil) { 989 z.z_untilrule.r_filename = filename; 990 z.z_untilrule.r_linenum = linenum; 991 rulesub(&z.z_untilrule, 992 fields[i_untilyear], 993 "only", 994 "", 995 (nfields > i_untilmonth) ? 996 fields[i_untilmonth] : "Jan", 997 (nfields > i_untilday) ? fields[i_untilday] : "1", 998 (nfields > i_untiltime) ? fields[i_untiltime] : "0"); 999 z.z_untiltime = rpytime(&z.z_untilrule, 1000 z.z_untilrule.r_loyear); 1001 if (iscont && nzones > 0 && 1002 z.z_untiltime > min_time && 1003 z.z_untiltime < max_time && 1004 zones[nzones - 1].z_untiltime > min_time && 1005 zones[nzones - 1].z_untiltime < max_time && 1006 zones[nzones - 1].z_untiltime >= z.z_untiltime) { 1007 error(_( 1008 "Zone continuation line end time is not after end time of previous line" 1009 )); 1010 return FALSE; 1011 } 1012 } 1013 zones = erealloc(zones, (nzones + 1) * sizeof *zones); 1014 zones[nzones++] = z; 1015 /* 1016 ** If there was an UNTIL field on this line, 1017 ** there's more information about the zone on the next line. 1018 */ 1019 return hasuntil; 1020 } 1021 1022 static void 1023 inleap(char ** const fields, const int nfields) 1024 { 1025 const char *cp; 1026 const struct lookup *lp; 1027 int i, j; 1028 zic_t year; 1029 int month, day; 1030 zic_t dayoff, tod; 1031 zic_t t; 1032 1033 if (nfields != LEAP_FIELDS) { 1034 error(_("wrong number of fields on Leap line")); 1035 return; 1036 } 1037 dayoff = 0; 1038 cp = fields[LP_YEAR]; 1039 if (sscanf(cp, scheck(cp, "%"SCNdZIC), &year) != 1) { 1040 /* 1041 ** Leapin' Lizards! 1042 */ 1043 error(_("invalid leaping year")); 1044 return; 1045 } 1046 if (!leapseen || leapmaxyear < year) 1047 leapmaxyear = year; 1048 if (!leapseen || leapminyear > year) 1049 leapminyear = year; 1050 leapseen = TRUE; 1051 j = EPOCH_YEAR; 1052 while (j != year) { 1053 if (year > j) { 1054 i = len_years[isleap(j)]; 1055 ++j; 1056 } else { 1057 --j; 1058 i = -len_years[isleap(j)]; 1059 } 1060 dayoff = oadd(dayoff, i); 1061 } 1062 if ((lp = byword(fields[LP_MONTH], mon_names)) == NULL) { 1063 error(_("invalid month name")); 1064 return; 1065 } 1066 month = lp->l_value; 1067 j = TM_JANUARY; 1068 while (j != month) { 1069 i = len_months[isleap(year)][j]; 1070 dayoff = oadd(dayoff, i); 1071 ++j; 1072 } 1073 cp = fields[LP_DAY]; 1074 if (sscanf(cp, scheck(cp, "%d"), &day) != 1 || 1075 day <= 0 || day > len_months[isleap(year)][month]) { 1076 error(_("invalid day of month")); 1077 return; 1078 } 1079 dayoff = oadd(dayoff, day - 1); 1080 if (dayoff < 0 && !TYPE_SIGNED(zic_t)) { 1081 error(_("time before zero")); 1082 return; 1083 } 1084 if (dayoff < min_time / SECSPERDAY) { 1085 error(_("time too small")); 1086 return; 1087 } 1088 if (dayoff > max_time / SECSPERDAY) { 1089 error(_("time too large")); 1090 return; 1091 } 1092 t = (zic_t) dayoff * SECSPERDAY; 1093 tod = gethms(fields[LP_TIME], _("invalid time of day"), FALSE); 1094 cp = fields[LP_CORR]; 1095 { 1096 int positive; 1097 int count; 1098 1099 if (strcmp(cp, "") == 0) { /* infile() turns "-" into "" */ 1100 positive = FALSE; 1101 count = 1; 1102 } else if (strcmp(cp, "--") == 0) { 1103 positive = FALSE; 1104 count = 2; 1105 } else if (strcmp(cp, "+") == 0) { 1106 positive = TRUE; 1107 count = 1; 1108 } else if (strcmp(cp, "++") == 0) { 1109 positive = TRUE; 1110 count = 2; 1111 } else { 1112 error(_("illegal CORRECTION field on Leap line")); 1113 return; 1114 } 1115 if ((lp = byword(fields[LP_ROLL], leap_types)) == NULL) { 1116 error(_( 1117 "illegal Rolling/Stationary field on Leap line" 1118 )); 1119 return; 1120 } 1121 leapadd(tadd(t, tod), positive, lp->l_value, count); 1122 } 1123 } 1124 1125 static void 1126 inlink(char ** const fields, const int nfields) 1127 { 1128 struct link l; 1129 1130 if (nfields != LINK_FIELDS) { 1131 error(_("wrong number of fields on Link line")); 1132 return; 1133 } 1134 if (*fields[LF_FROM] == '\0') { 1135 error(_("blank FROM field on Link line")); 1136 return; 1137 } 1138 if (*fields[LF_TO] == '\0') { 1139 error(_("blank TO field on Link line")); 1140 return; 1141 } 1142 l.l_filename = filename; 1143 l.l_linenum = linenum; 1144 l.l_from = ecpyalloc(fields[LF_FROM]); 1145 l.l_to = ecpyalloc(fields[LF_TO]); 1146 links = erealloc(links, (nlinks + 1) * sizeof *links); 1147 links[nlinks++] = l; 1148 } 1149 1150 static void 1151 rulesub(struct rule * const rp, 1152 const char * const loyearp, 1153 const char * const hiyearp, 1154 const char * const typep, 1155 const char * const monthp, 1156 const char * const dayp, 1157 const char * const timep) 1158 { 1159 const struct lookup *lp; 1160 const char *cp; 1161 char *dp; 1162 char *ep; 1163 1164 if ((lp = byword(monthp, mon_names)) == NULL) { 1165 error(_("invalid month name")); 1166 return; 1167 } 1168 rp->r_month = lp->l_value; 1169 rp->r_todisstd = FALSE; 1170 rp->r_todisgmt = FALSE; 1171 dp = ecpyalloc(timep); 1172 if (*dp != '\0') { 1173 ep = dp + strlen(dp) - 1; 1174 switch (lowerit(*ep)) { 1175 case 's': /* Standard */ 1176 rp->r_todisstd = TRUE; 1177 rp->r_todisgmt = FALSE; 1178 *ep = '\0'; 1179 break; 1180 case 'w': /* Wall */ 1181 rp->r_todisstd = FALSE; 1182 rp->r_todisgmt = FALSE; 1183 *ep = '\0'; 1184 break; 1185 case 'g': /* Greenwich */ 1186 case 'u': /* Universal */ 1187 case 'z': /* Zulu */ 1188 rp->r_todisstd = TRUE; 1189 rp->r_todisgmt = TRUE; 1190 *ep = '\0'; 1191 break; 1192 } 1193 } 1194 rp->r_tod = gethms(dp, _("invalid time of day"), FALSE); 1195 free(dp); 1196 /* 1197 ** Year work. 1198 */ 1199 cp = loyearp; 1200 lp = byword(cp, begin_years); 1201 rp->r_lowasnum = lp == NULL; 1202 if (!rp->r_lowasnum) switch ((int) lp->l_value) { 1203 case YR_MINIMUM: 1204 rp->r_loyear = ZIC_MIN; 1205 break; 1206 case YR_MAXIMUM: 1207 rp->r_loyear = ZIC_MAX; 1208 break; 1209 default: /* "cannot happen" */ 1210 errx(EXIT_FAILURE, 1211 _("panic: invalid l_value %d"), lp->l_value); 1212 } else if (sscanf(cp, scheck(cp, "%"SCNdZIC), &rp->r_loyear) != 1) { 1213 error(_("invalid starting year")); 1214 return; 1215 } 1216 cp = hiyearp; 1217 lp = byword(cp, end_years); 1218 rp->r_hiwasnum = lp == NULL; 1219 if (!rp->r_hiwasnum) switch ((int) lp->l_value) { 1220 case YR_MINIMUM: 1221 rp->r_hiyear = ZIC_MIN; 1222 break; 1223 case YR_MAXIMUM: 1224 rp->r_hiyear = ZIC_MAX; 1225 break; 1226 case YR_ONLY: 1227 rp->r_hiyear = rp->r_loyear; 1228 break; 1229 default: /* "cannot happen" */ 1230 errx(EXIT_FAILURE, 1231 _("panic: invalid l_value %d"), lp->l_value); 1232 } else if (sscanf(cp, scheck(cp, "%"SCNdZIC), &rp->r_hiyear) != 1) { 1233 error(_("invalid ending year")); 1234 return; 1235 } 1236 if (rp->r_loyear > rp->r_hiyear) { 1237 error(_("starting year greater than ending year")); 1238 return; 1239 } 1240 if (*typep == '\0') 1241 rp->r_yrtype = NULL; 1242 else { 1243 if (rp->r_loyear == rp->r_hiyear) { 1244 error(_("typed single year")); 1245 return; 1246 } 1247 rp->r_yrtype = ecpyalloc(typep); 1248 } 1249 /* 1250 ** Day work. 1251 ** Accept things such as: 1252 ** 1 1253 ** last-Sunday 1254 ** Sun<=20 1255 ** Sun>=7 1256 */ 1257 dp = ecpyalloc(dayp); 1258 if ((lp = byword(dp, lasts)) != NULL) { 1259 rp->r_dycode = DC_DOWLEQ; 1260 rp->r_wday = lp->l_value; 1261 rp->r_dayofmonth = len_months[1][rp->r_month]; 1262 } else { 1263 if ((ep = strchr(dp, '<')) != NULL) 1264 rp->r_dycode = DC_DOWLEQ; 1265 else if ((ep = strchr(dp, '>')) != NULL) 1266 rp->r_dycode = DC_DOWGEQ; 1267 else { 1268 ep = dp; 1269 rp->r_dycode = DC_DOM; 1270 } 1271 if (rp->r_dycode != DC_DOM) { 1272 *ep++ = 0; 1273 if (*ep++ != '=') { 1274 error(_("invalid day of month")); 1275 free(dp); 1276 return; 1277 } 1278 if ((lp = byword(dp, wday_names)) == NULL) { 1279 error(_("invalid weekday name")); 1280 free(dp); 1281 return; 1282 } 1283 rp->r_wday = lp->l_value; 1284 } 1285 if (sscanf(ep, scheck(ep, "%d"), &rp->r_dayofmonth) != 1 || 1286 rp->r_dayofmonth <= 0 || 1287 (rp->r_dayofmonth > len_months[1][rp->r_month])) { 1288 error(_("invalid day of month")); 1289 free(dp); 1290 return; 1291 } 1292 } 1293 free(dp); 1294 } 1295 1296 static void 1297 convert(const int_fast32_t val, char *const buf) 1298 { 1299 int i; 1300 int shift; 1301 unsigned char * const b = (unsigned char *) buf; 1302 1303 for (i = 0, shift = 24; i < 4; ++i, shift -= 8) 1304 b[i] = val >> shift; 1305 } 1306 1307 static void 1308 convert64(const zic_t val, char * const buf) 1309 { 1310 int i; 1311 int shift; 1312 unsigned char *const b = (unsigned char *) buf; 1313 1314 for (i = 0, shift = 56; i < 8; ++i, shift -= 8) 1315 b[i] = val >> shift; 1316 } 1317 1318 static void 1319 puttzcode(const int_fast32_t val, FILE *const fp) 1320 { 1321 char buf[4]; 1322 1323 convert(val, buf); 1324 fwrite(buf, sizeof buf, 1, fp); 1325 } 1326 1327 static void 1328 puttzcode64(const zic_t val, FILE * const fp) 1329 { 1330 char buf[8]; 1331 1332 convert64(val, buf); 1333 fwrite(buf, sizeof buf, 1, fp); 1334 } 1335 1336 static int 1337 atcomp(const void * avp, const void * bvp) 1338 { 1339 const zic_t a = ((const struct attype *) avp)->at; 1340 const zic_t b = ((const struct attype *) bvp)->at; 1341 1342 return (a < b) ? -1 : (a > b); 1343 } 1344 1345 static int 1346 is32(const zic_t x) 1347 { 1348 return INT32_MIN <= x && x <= INT32_MAX; 1349 } 1350 1351 static void 1352 writezone(const char * const name, const char * const string, char version) 1353 { 1354 FILE * fp; 1355 int i, j; 1356 int leapcnt32, leapi32; 1357 int timecnt32, timei32; 1358 int pass; 1359 static char * fullname; 1360 static const struct tzhead tzh0; 1361 static struct tzhead tzh; 1362 zic_t ats[TZ_MAX_TIMES]; 1363 unsigned char types[TZ_MAX_TIMES]; 1364 1365 /* 1366 ** Sort. 1367 */ 1368 if (timecnt > 1) 1369 qsort(attypes, timecnt, sizeof *attypes, atcomp); 1370 /* 1371 ** Optimize. 1372 */ 1373 { 1374 int fromi; 1375 int toi; 1376 1377 toi = 0; 1378 fromi = 0; 1379 while (fromi < timecnt && attypes[fromi].at < min_time) 1380 ++fromi; 1381 /* 1382 ** Remember that type 0 is reserved. 1383 */ 1384 if (isdsts[1] == 0) 1385 while (fromi < timecnt && attypes[fromi].type == 1) 1386 ++fromi; /* handled by default rule */ 1387 for ( ; fromi < timecnt; ++fromi) { 1388 if (toi != 0 && ((attypes[fromi].at + 1389 gmtoffs[attypes[toi - 1].type]) <= 1390 (attypes[toi - 1].at + gmtoffs[toi == 1 ? 0 1391 : attypes[toi - 2].type]))) { 1392 attypes[toi - 1].type = 1393 attypes[fromi].type; 1394 continue; 1395 } 1396 if (toi == 0 || 1397 attypes[toi - 1].type != attypes[fromi].type) 1398 attypes[toi++] = attypes[fromi]; 1399 } 1400 timecnt = toi; 1401 } 1402 /* 1403 ** Transfer. 1404 */ 1405 for (i = 0; i < timecnt; ++i) { 1406 ats[i] = attypes[i].at; 1407 types[i] = attypes[i].type; 1408 } 1409 /* 1410 ** Correct for leap seconds. 1411 */ 1412 for (i = 0; i < timecnt; ++i) { 1413 j = leapcnt; 1414 while (--j >= 0) 1415 if (ats[i] > trans[j] - corr[j]) { 1416 ats[i] = tadd(ats[i], corr[j]); 1417 break; 1418 } 1419 } 1420 /* 1421 ** Figure out 32-bit-limited starts and counts. 1422 */ 1423 timecnt32 = timecnt; 1424 timei32 = 0; 1425 leapcnt32 = leapcnt; 1426 leapi32 = 0; 1427 while (timecnt32 > 0 && !is32(ats[timecnt32 - 1])) 1428 --timecnt32; 1429 while (timecnt32 > 0 && !is32(ats[timei32])) { 1430 --timecnt32; 1431 ++timei32; 1432 } 1433 while (leapcnt32 > 0 && !is32(trans[leapcnt32 - 1])) 1434 --leapcnt32; 1435 while (leapcnt32 > 0 && !is32(trans[leapi32])) { 1436 --leapcnt32; 1437 ++leapi32; 1438 } 1439 fullname = erealloc(fullname, 1440 strlen(directory) + 1 + strlen(name) + 1); 1441 sprintf(fullname, "%s/%s", directory, name); 1442 /* 1443 ** Remove old file, if any, to snap links. 1444 */ 1445 if (!itsdir(fullname) && remove(fullname) != 0 && errno != ENOENT) 1446 err(EXIT_FAILURE, _("can't remove %s"), fullname); 1447 if ((fp = fopen(fullname, "wb")) == NULL) { 1448 if (mkdirs(fullname) != 0) 1449 exit(EXIT_FAILURE); 1450 if ((fp = fopen(fullname, "wb")) == NULL) 1451 err(EXIT_FAILURE, _("can't create %s"), fullname); 1452 } 1453 for (pass = 1; pass <= 2; ++pass) { 1454 int thistimei, thistimecnt; 1455 int thisleapi, thisleapcnt; 1456 int thistimelim, thisleaplim; 1457 int writetype[TZ_MAX_TIMES]; 1458 int typemap[TZ_MAX_TYPES]; 1459 int thistypecnt; 1460 char thischars[TZ_MAX_CHARS]; 1461 char thischarcnt; 1462 int indmap[TZ_MAX_CHARS]; 1463 1464 if (pass == 1) { 1465 thistimei = timei32; 1466 thistimecnt = timecnt32; 1467 thisleapi = leapi32; 1468 thisleapcnt = leapcnt32; 1469 } else { 1470 thistimei = 0; 1471 thistimecnt = timecnt; 1472 thisleapi = 0; 1473 thisleapcnt = leapcnt; 1474 } 1475 thistimelim = thistimei + thistimecnt; 1476 thisleaplim = thisleapi + thisleapcnt; 1477 /* 1478 ** Remember that type 0 is reserved. 1479 */ 1480 writetype[0] = FALSE; 1481 for (i = 1; i < typecnt; ++i) 1482 writetype[i] = thistimecnt == timecnt; 1483 if (thistimecnt == 0) { 1484 /* 1485 ** No transition times fall in the current 1486 ** (32- or 64-bit) window. 1487 */ 1488 if (typecnt != 0) 1489 writetype[typecnt - 1] = TRUE; 1490 } else { 1491 for (i = thistimei - 1; i < thistimelim; ++i) 1492 if (i >= 0) 1493 writetype[types[i]] = TRUE; 1494 /* 1495 ** For America/Godthab and Antarctica/Palmer 1496 */ 1497 /* 1498 ** Remember that type 0 is reserved. 1499 */ 1500 if (thistimei == 0) 1501 writetype[1] = TRUE; 1502 } 1503 /* 1504 ** For some pre-2011 systems: if the last-to-be-written 1505 ** standard (or daylight) type has an offset different from the 1506 ** most recently used offset, 1507 ** append an (unused) copy of the most recently used type 1508 ** (to help get global "altzone" and "timezone" variables 1509 ** set correctly). 1510 */ 1511 { 1512 int mrudst, mrustd, hidst, histd, type; 1513 1514 hidst = histd = mrudst = mrustd = -1; 1515 for (i = thistimei; i < thistimelim; ++i) 1516 if (isdsts[types[i]]) 1517 mrudst = types[i]; 1518 else mrustd = types[i]; 1519 for (i = 0; i < typecnt; ++i) 1520 if (writetype[i]) { 1521 if (isdsts[i]) 1522 hidst = i; 1523 else histd = i; 1524 } 1525 if (hidst >= 0 && mrudst >= 0 && hidst != mrudst && 1526 gmtoffs[hidst] != gmtoffs[mrudst]) { 1527 isdsts[mrudst] = -1; 1528 type = addtype(gmtoffs[mrudst], 1529 &chars[abbrinds[mrudst]], 1530 TRUE, 1531 ttisstds[mrudst], 1532 ttisgmts[mrudst]); 1533 isdsts[mrudst] = TRUE; 1534 writetype[type] = TRUE; 1535 } 1536 if (histd >= 0 && mrustd >= 0 && histd != mrustd && 1537 gmtoffs[histd] != gmtoffs[mrustd]) { 1538 isdsts[mrustd] = -1; 1539 type = addtype(gmtoffs[mrustd], 1540 &chars[abbrinds[mrustd]], 1541 FALSE, 1542 ttisstds[mrustd], 1543 ttisgmts[mrustd]); 1544 isdsts[mrustd] = FALSE; 1545 writetype[type] = TRUE; 1546 } 1547 } 1548 thistypecnt = 0; 1549 /* 1550 ** Potentially, set type 0 to that of lowest-valued time. 1551 */ 1552 if (thistimei > 0) { 1553 for (i = 1; i < typecnt; ++i) 1554 if (writetype[i] && !isdsts[i]) 1555 break; 1556 if (i != types[thistimei - 1]) { 1557 i = types[thistimei - 1]; 1558 gmtoffs[0] = gmtoffs[i]; 1559 isdsts[0] = isdsts[i]; 1560 ttisstds[0] = ttisstds[i]; 1561 ttisgmts[0] = ttisgmts[i]; 1562 abbrinds[0] = abbrinds[i]; 1563 writetype[0] = TRUE; 1564 writetype[i] = FALSE; 1565 } 1566 } 1567 for (i = 0; i < typecnt; ++i) 1568 typemap[i] = writetype[i] ? thistypecnt++ : 0; 1569 for (i = 0; i < sizeof indmap / sizeof indmap[0]; ++i) 1570 indmap[i] = -1; 1571 thischarcnt = 0; 1572 for (i = 0; i < typecnt; ++i) { 1573 char * thisabbr; 1574 1575 if (!writetype[i]) 1576 continue; 1577 if (indmap[abbrinds[i]] >= 0) 1578 continue; 1579 thisabbr = &chars[abbrinds[i]]; 1580 for (j = 0; j < thischarcnt; ++j) 1581 if (strcmp(&thischars[j], thisabbr) == 0) 1582 break; 1583 if (j == thischarcnt) { 1584 strcpy(&thischars[(int) thischarcnt], 1585 thisabbr); 1586 thischarcnt += strlen(thisabbr) + 1; 1587 } 1588 indmap[abbrinds[i]] = j; 1589 } 1590 #define DO(field) fwrite(tzh.field, sizeof tzh.field, 1, fp) 1591 tzh = tzh0; 1592 strncpy(tzh.tzh_magic, TZ_MAGIC, sizeof tzh.tzh_magic); 1593 tzh.tzh_version[0] = version; 1594 convert(thistypecnt, tzh.tzh_ttisgmtcnt); 1595 convert(thistypecnt, tzh.tzh_ttisstdcnt); 1596 convert(thisleapcnt, tzh.tzh_leapcnt); 1597 convert(thistimecnt, tzh.tzh_timecnt); 1598 convert(thistypecnt, tzh.tzh_typecnt); 1599 convert(thischarcnt, tzh.tzh_charcnt); 1600 DO(tzh_magic); 1601 DO(tzh_version); 1602 DO(tzh_reserved); 1603 DO(tzh_ttisgmtcnt); 1604 DO(tzh_ttisstdcnt); 1605 DO(tzh_leapcnt); 1606 DO(tzh_timecnt); 1607 DO(tzh_typecnt); 1608 DO(tzh_charcnt); 1609 #undef DO 1610 for (i = thistimei; i < thistimelim; ++i) 1611 if (pass == 1) 1612 puttzcode(ats[i], fp); 1613 else puttzcode64(ats[i], fp); 1614 for (i = thistimei; i < thistimelim; ++i) { 1615 unsigned char uc; 1616 1617 uc = typemap[types[i]]; 1618 fwrite(&uc, sizeof uc, 1, fp); 1619 } 1620 for (i = 0; i < typecnt; ++i) 1621 if (writetype[i]) { 1622 puttzcode(gmtoffs[i], fp); 1623 putc(isdsts[i], fp); 1624 putc((unsigned char) indmap[abbrinds[i]], fp); 1625 } 1626 if (thischarcnt != 0) 1627 fwrite(thischars, sizeof thischars[0], 1628 thischarcnt, fp); 1629 for (i = thisleapi; i < thisleaplim; ++i) { 1630 zic_t todo; 1631 1632 if (roll[i]) { 1633 if (timecnt == 0 || trans[i] < ats[0]) { 1634 j = 0; 1635 while (isdsts[j]) 1636 if (++j >= typecnt) { 1637 j = 0; 1638 break; 1639 } 1640 } else { 1641 j = 1; 1642 while (j < timecnt && 1643 trans[i] >= ats[j]) 1644 ++j; 1645 j = types[j - 1]; 1646 } 1647 todo = tadd(trans[i], -gmtoffs[j]); 1648 } else todo = trans[i]; 1649 if (pass == 1) 1650 puttzcode(todo, fp); 1651 else puttzcode64(todo, fp); 1652 puttzcode(corr[i], fp); 1653 } 1654 for (i = 0; i < typecnt; ++i) 1655 if (writetype[i]) 1656 putc(ttisstds[i], fp); 1657 for (i = 0; i < typecnt; ++i) 1658 if (writetype[i]) 1659 putc(ttisgmts[i], fp); 1660 } 1661 fprintf(fp, "\n%s\n", string); 1662 if (ferror(fp) || fclose(fp)) 1663 errx(EXIT_FAILURE, _("error writing %s"), fullname); 1664 if (chmod(fullname, mflag) < 0) 1665 err(EXIT_FAILURE, _("cannot change mode of %s to %03o"), 1666 fullname, (unsigned)mflag); 1667 if ((uflag != (uid_t)-1 || gflag != (gid_t)-1) 1668 && chown(fullname, uflag, gflag) < 0) 1669 err(EXIT_FAILURE, _("cannot change ownership of %s"), 1670 fullname); 1671 } 1672 1673 static void 1674 doabbr(char * const abbr, const char * const format, 1675 const char * const letters, const int isdst, const int doquotes) 1676 { 1677 char * cp; 1678 char * slashp; 1679 int len; 1680 1681 slashp = strchr(format, '/'); 1682 if (slashp == NULL) { 1683 if (letters == NULL) 1684 strcpy(abbr, format); 1685 else sprintf(abbr, format, letters); 1686 } else if (isdst) { 1687 strcpy(abbr, slashp + 1); 1688 } else { 1689 if (slashp > format) 1690 strncpy(abbr, format, slashp - format); 1691 abbr[slashp - format] = '\0'; 1692 } 1693 if (!doquotes) 1694 return; 1695 for (cp = abbr; *cp != '\0'; ++cp) 1696 if (strchr("ABCDEFGHIJKLMNOPQRSTUVWXYZ", *cp) == NULL && 1697 strchr("abcdefghijklmnopqrstuvwxyz", *cp) == NULL) 1698 break; 1699 len = strlen(abbr); 1700 if (len > 0 && *cp == '\0') 1701 return; 1702 abbr[len + 2] = '\0'; 1703 abbr[len + 1] = '>'; 1704 for ( ; len > 0; --len) 1705 abbr[len] = abbr[len - 1]; 1706 abbr[0] = '<'; 1707 } 1708 1709 static void 1710 updateminmax(const zic_t x) 1711 { 1712 if (min_year > x) 1713 min_year = x; 1714 if (max_year < x) 1715 max_year = x; 1716 } 1717 1718 static int 1719 stringoffset(char *result, zic_t offset) 1720 { 1721 int hours; 1722 int minutes; 1723 int seconds; 1724 1725 result[0] = '\0'; 1726 if (offset < 0) { 1727 strcpy(result, "-"); 1728 offset = -offset; 1729 } 1730 seconds = offset % SECSPERMIN; 1731 offset /= SECSPERMIN; 1732 minutes = offset % MINSPERHOUR; 1733 offset /= MINSPERHOUR; 1734 hours = offset; 1735 if (hours >= HOURSPERDAY * DAYSPERWEEK) { 1736 result[0] = '\0'; 1737 return -1; 1738 } 1739 sprintf(end(result), "%d", hours); 1740 if (minutes != 0 || seconds != 0) { 1741 sprintf(end(result), ":%02d", minutes); 1742 if (seconds != 0) 1743 sprintf(end(result), ":%02d", seconds); 1744 } 1745 return 0; 1746 } 1747 1748 static int 1749 stringrule(char *result, const struct rule * const rp, const zic_t dstoff, 1750 const zic_t gmtoff) 1751 { 1752 zic_t tod = rp->r_tod; 1753 int compat = 0; 1754 1755 result = end(result); 1756 if (rp->r_dycode == DC_DOM) { 1757 int month, total; 1758 1759 if (rp->r_dayofmonth == 29 && rp->r_month == TM_FEBRUARY) 1760 return -1; 1761 total = 0; 1762 for (month = 0; month < rp->r_month; ++month) 1763 total += len_months[0][month]; 1764 /* Omit the "J" in Jan and Feb, as that's shorter. */ 1765 if (rp->r_month <= 1) 1766 sprintf(result, "%d", total + rp->r_dayofmonth - 1); 1767 else 1768 sprintf(result, "J%d", total + rp->r_dayofmonth); 1769 } else { 1770 int week; 1771 int wday = rp->r_wday; 1772 int wdayoff; 1773 1774 if (rp->r_dycode == DC_DOWGEQ) { 1775 wdayoff = (rp->r_dayofmonth - 1) % DAYSPERWEEK; 1776 if (wdayoff) 1777 compat = 2013; 1778 wday -= wdayoff; 1779 tod += wdayoff * SECSPERDAY; 1780 week = 1 + (rp->r_dayofmonth - 1) / DAYSPERWEEK; 1781 } else if (rp->r_dycode == DC_DOWLEQ) { 1782 if (rp->r_dayofmonth == len_months[1][rp->r_month]) 1783 week = 5; 1784 else { 1785 wdayoff = rp->r_dayofmonth % DAYSPERWEEK; 1786 if (wdayoff) 1787 compat = 2013; 1788 wday -= wdayoff; 1789 tod += wdayoff * SECSPERDAY; 1790 week = rp->r_dayofmonth / DAYSPERWEEK; 1791 } 1792 } else return -1; /* "cannot happen" */ 1793 if (wday < 0) 1794 wday += DAYSPERWEEK; 1795 sprintf(result, "M%d.%d.%d", 1796 rp->r_month + 1, week, wday); 1797 } 1798 if (rp->r_todisgmt) 1799 tod += gmtoff; 1800 if (rp->r_todisstd && rp->r_stdoff == 0) 1801 tod += dstoff; 1802 if (tod != 2 * SECSPERMIN * MINSPERHOUR) { 1803 strcat(result, "/"); 1804 if (stringoffset(end(result), tod) != 0) 1805 return -1; 1806 if (tod < 0) { 1807 if (compat < 2013) 1808 compat = 2013; 1809 } else if (SECSPERDAY <= tod) { 1810 if (compat < 1994) 1811 compat = 1994; 1812 } 1813 } 1814 return compat; 1815 } 1816 1817 static int 1818 rule_cmp(struct rule const *a, struct rule const *b) 1819 { 1820 if (!a) 1821 return -!!b; 1822 if (!b) 1823 return 1; 1824 if (a->r_hiyear != b->r_hiyear) 1825 return a->r_hiyear < b->r_hiyear ? -1 : 1; 1826 if (a->r_month - b->r_month != 0) 1827 return a->r_month - b->r_month; 1828 return a->r_dayofmonth - b->r_dayofmonth; 1829 } 1830 1831 enum { YEAR_BY_YEAR_ZONE = 1 }; 1832 1833 static int 1834 stringzone(char *result, const struct zone * const zpfirst, 1835 const int zonecount) 1836 { 1837 const struct zone * zp; 1838 struct rule * rp; 1839 struct rule * stdrp; 1840 struct rule * dstrp; 1841 int i; 1842 const char * abbrvar; 1843 int compat = 0; 1844 int c; 1845 struct rule stdr, dstr; 1846 1847 result[0] = '\0'; 1848 zp = zpfirst + zonecount - 1; 1849 stdrp = dstrp = NULL; 1850 for (i = 0; i < zp->z_nrules; ++i) { 1851 rp = &zp->z_rules[i]; 1852 if (rp->r_hiwasnum || rp->r_hiyear != ZIC_MAX) 1853 continue; 1854 if (rp->r_yrtype != NULL) 1855 continue; 1856 if (rp->r_stdoff == 0) { 1857 if (stdrp == NULL) 1858 stdrp = rp; 1859 else return -1; 1860 } else { 1861 if (dstrp == NULL) 1862 dstrp = rp; 1863 else return -1; 1864 } 1865 } 1866 if (stdrp == NULL && dstrp == NULL) { 1867 /* 1868 ** There are no rules running through "max". 1869 ** Find the latest std rule in stdabbrrp 1870 ** and latest rule of any type in stdrp. 1871 */ 1872 struct rule *stdabbrrp = NULL; 1873 for (i = 0; i < zp->z_nrules; ++i) { 1874 rp = &zp->z_rules[i]; 1875 if (rp->r_stdoff == 0 && rule_cmp(stdabbrrp, rp) < 0) 1876 stdabbrrp = rp; 1877 if (rule_cmp(stdrp, rp) < 0) 1878 stdrp = rp; 1879 } 1880 /* 1881 ** Horrid special case: if year is 2037, 1882 ** presume this is a zone handled on a year-by-year basis; 1883 ** do not try to apply a rule to the zone. 1884 */ 1885 if (stdrp != NULL && stdrp->r_hiyear == 2037) 1886 return YEAR_BY_YEAR_ZONE; 1887 1888 if (stdrp != NULL && stdrp->r_stdoff != 0) { 1889 /* Perpetual DST. */ 1890 dstr.r_month = TM_JANUARY; 1891 dstr.r_dycode = DC_DOM; 1892 dstr.r_dayofmonth = 1; 1893 dstr.r_tod = 0; 1894 dstr.r_todisstd = dstr.r_todisgmt = FALSE; 1895 dstr.r_stdoff = stdrp->r_stdoff; 1896 dstr.r_abbrvar = stdrp->r_abbrvar; 1897 stdr.r_month = TM_DECEMBER; 1898 stdr.r_dycode = DC_DOM; 1899 stdr.r_dayofmonth = 31; 1900 stdr.r_tod = SECSPERDAY + stdrp->r_stdoff; 1901 stdr.r_todisstd = stdr.r_todisgmt = FALSE; 1902 stdr.r_stdoff = 0; 1903 stdr.r_abbrvar 1904 = (stdabbrrp ? stdabbrrp->r_abbrvar : ""); 1905 dstrp = &dstr; 1906 stdrp = &stdr; 1907 } 1908 } 1909 if (stdrp == NULL && (zp->z_nrules != 0 || zp->z_stdoff != 0)) 1910 return -1; 1911 abbrvar = (stdrp == NULL) ? "" : stdrp->r_abbrvar; 1912 doabbr(result, zp->z_format, abbrvar, FALSE, TRUE); 1913 if (stringoffset(end(result), -zp->z_gmtoff) != 0) { 1914 result[0] = '\0'; 1915 return -1; 1916 } 1917 if (dstrp == NULL) 1918 return compat; 1919 doabbr(end(result), zp->z_format, dstrp->r_abbrvar, TRUE, TRUE); 1920 if (dstrp->r_stdoff != SECSPERMIN * MINSPERHOUR) 1921 if (stringoffset(end(result), 1922 -(zp->z_gmtoff + dstrp->r_stdoff)) != 0) { 1923 result[0] = '\0'; 1924 return -1; 1925 } 1926 strcat(result, ","); 1927 c = stringrule(result, dstrp, dstrp->r_stdoff, zp->z_gmtoff); 1928 if (c < 0) { 1929 result[0] = '\0'; 1930 return -1; 1931 } 1932 if (compat < c) 1933 compat = c; 1934 strcat(result, ","); 1935 c = stringrule(result, stdrp, dstrp->r_stdoff, zp->z_gmtoff); 1936 if (c < 0) { 1937 result[0] = '\0'; 1938 return -1; 1939 } 1940 if (compat < c) 1941 compat = c; 1942 return compat; 1943 } 1944 1945 static void 1946 outzone(const struct zone * const zpfirst, const int zonecount) 1947 { 1948 const struct zone *zp; 1949 struct rule *rp; 1950 int i, j; 1951 int usestart, useuntil; 1952 zic_t starttime, untiltime; 1953 zic_t gmtoff; 1954 zic_t stdoff; 1955 zic_t year; 1956 zic_t startoff; 1957 int startttisstd; 1958 int startttisgmt; 1959 int type; 1960 char *startbuf; 1961 char *ab; 1962 char *envvar; 1963 int max_abbr_len; 1964 int max_envvar_len; 1965 int prodstic; /* all rules are min to max */ 1966 int compat; 1967 int do_extend; 1968 char version; 1969 1970 max_abbr_len = 2 + max_format_len + max_abbrvar_len; 1971 max_envvar_len = 2 * max_abbr_len + 5 * 9; 1972 startbuf = emalloc(max_abbr_len + 1); 1973 ab = emalloc(max_abbr_len + 1); 1974 envvar = emalloc(max_envvar_len + 1); 1975 INITIALIZE(untiltime); 1976 INITIALIZE(starttime); 1977 /* 1978 ** Now. . .finally. . .generate some useful data! 1979 */ 1980 timecnt = 0; 1981 typecnt = 0; 1982 charcnt = 0; 1983 prodstic = zonecount == 1; 1984 /* 1985 ** Thanks to Earl Chew 1986 ** for noting the need to unconditionally initialize startttisstd. 1987 */ 1988 startttisstd = FALSE; 1989 startttisgmt = FALSE; 1990 min_year = max_year = EPOCH_YEAR; 1991 if (leapseen) { 1992 updateminmax(leapminyear); 1993 updateminmax(leapmaxyear + (leapmaxyear < ZIC_MAX)); 1994 } 1995 /* 1996 ** Reserve type 0. 1997 */ 1998 gmtoffs[0] = isdsts[0] = ttisstds[0] = ttisgmts[0] = abbrinds[0] = -1; 1999 typecnt = 1; 2000 for (i = 0; i < zonecount; ++i) { 2001 zp = &zpfirst[i]; 2002 if (i < zonecount - 1) 2003 updateminmax(zp->z_untilrule.r_loyear); 2004 for (j = 0; j < zp->z_nrules; ++j) { 2005 rp = &zp->z_rules[j]; 2006 if (rp->r_lowasnum) 2007 updateminmax(rp->r_loyear); 2008 if (rp->r_hiwasnum) 2009 updateminmax(rp->r_hiyear); 2010 if (rp->r_lowasnum || rp->r_hiwasnum) 2011 prodstic = FALSE; 2012 } 2013 } 2014 /* 2015 ** Generate lots of data if a rule can't cover all future times. 2016 */ 2017 compat = stringzone(envvar, zpfirst, zonecount); 2018 version = compat < 2013 ? ZIC_VERSION_PRE_2013 : ZIC_VERSION; 2019 do_extend = compat < 0 || compat == YEAR_BY_YEAR_ZONE; 2020 if (noise) { 2021 if (!*envvar) 2022 warning("%s %s", 2023 _("no POSIX environment variable for zone"), 2024 zpfirst->z_name); 2025 else if (compat != 0 && compat != YEAR_BY_YEAR_ZONE) { 2026 /* Circa-COMPAT clients, and earlier clients, might 2027 not work for this zone when given dates before 2028 1970 or after 2038. */ 2029 warning(_("%s: pre-%d clients may mishandle" 2030 " distant timestamps"), 2031 zpfirst->z_name, compat); 2032 } 2033 } 2034 if (do_extend) { 2035 /* 2036 ** Search through a couple of extra years past the obvious 2037 ** 400, to avoid edge cases. For example, suppose a non-POSIX 2038 ** rule applies from 2012 onwards and has transitions in March 2039 ** and September, plus some one-off transitions in November 2040 ** 2013. If zic looked only at the last 400 years, it would 2041 ** set max_year=2413, with the intent that the 400 years 2014 2042 ** through 2413 will be repeated. The last transition listed 2043 ** in the tzfile would be in 2413-09, less than 400 years 2044 ** after the last one-off transition in 2013-11. Two years 2045 ** might be overkill, but with the kind of edge cases 2046 ** available we're not sure that one year would suffice. 2047 */ 2048 enum { years_of_observations = YEARSPERREPEAT + 2 }; 2049 2050 if (min_year >= ZIC_MIN + years_of_observations) 2051 min_year -= years_of_observations; 2052 else min_year = ZIC_MIN; 2053 if (max_year <= ZIC_MAX - years_of_observations) 2054 max_year += years_of_observations; 2055 else max_year = ZIC_MAX; 2056 /* 2057 ** Regardless of any of the above, 2058 ** for a "proDSTic" zone which specifies that its rules 2059 ** always have and always will be in effect, 2060 ** we only need one cycle to define the zone. 2061 */ 2062 if (prodstic) { 2063 min_year = 1900; 2064 max_year = min_year + years_of_observations; 2065 } 2066 } 2067 /* 2068 ** For the benefit of older systems, 2069 ** generate data from 1900 through 2037. 2070 */ 2071 if (min_year > 1900) 2072 min_year = 1900; 2073 if (max_year < 2037) 2074 max_year = 2037; 2075 for (i = 0; i < zonecount; ++i) { 2076 /* 2077 ** A guess that may well be corrected later. 2078 */ 2079 stdoff = 0; 2080 zp = &zpfirst[i]; 2081 usestart = i > 0 && (zp - 1)->z_untiltime > min_time; 2082 useuntil = i < (zonecount - 1); 2083 if (useuntil && zp->z_untiltime <= min_time) 2084 continue; 2085 gmtoff = zp->z_gmtoff; 2086 eat(zp->z_filename, zp->z_linenum); 2087 *startbuf = '\0'; 2088 startoff = zp->z_gmtoff; 2089 if (zp->z_nrules == 0) { 2090 stdoff = zp->z_stdoff; 2091 doabbr(startbuf, zp->z_format, 2092 NULL, stdoff != 0, FALSE); 2093 type = addtype(oadd(zp->z_gmtoff, stdoff), 2094 startbuf, stdoff != 0, startttisstd, 2095 startttisgmt); 2096 if (usestart) { 2097 addtt(starttime, type); 2098 usestart = FALSE; 2099 } else if (stdoff != 0) 2100 addtt(min_time, type); 2101 } else for (year = min_year; year <= max_year; ++year) { 2102 if (useuntil && year > zp->z_untilrule.r_hiyear) 2103 break; 2104 /* 2105 ** Mark which rules to do in the current year. 2106 ** For those to do, calculate rpytime(rp, year); 2107 */ 2108 for (j = 0; j < zp->z_nrules; ++j) { 2109 rp = &zp->z_rules[j]; 2110 eats(zp->z_filename, zp->z_linenum, 2111 rp->r_filename, rp->r_linenum); 2112 rp->r_todo = year >= rp->r_loyear && 2113 year <= rp->r_hiyear && 2114 yearistype(year, rp->r_yrtype); 2115 if (rp->r_todo) 2116 rp->r_temp = rpytime(rp, year); 2117 } 2118 for ( ; ; ) { 2119 int k; 2120 zic_t jtime, ktime; 2121 zic_t offset; 2122 2123 INITIALIZE(ktime); 2124 if (useuntil) { 2125 /* 2126 ** Turn untiltime into UT 2127 ** assuming the current gmtoff and 2128 ** stdoff values. 2129 */ 2130 untiltime = zp->z_untiltime; 2131 if (!zp->z_untilrule.r_todisgmt) 2132 untiltime = tadd(untiltime, 2133 -gmtoff); 2134 if (!zp->z_untilrule.r_todisstd) 2135 untiltime = tadd(untiltime, 2136 -stdoff); 2137 } 2138 /* 2139 ** Find the rule (of those to do, if any) 2140 ** that takes effect earliest in the year. 2141 */ 2142 k = -1; 2143 for (j = 0; j < zp->z_nrules; ++j) { 2144 rp = &zp->z_rules[j]; 2145 if (!rp->r_todo) 2146 continue; 2147 eats(zp->z_filename, zp->z_linenum, 2148 rp->r_filename, rp->r_linenum); 2149 offset = rp->r_todisgmt ? 0 : gmtoff; 2150 if (!rp->r_todisstd) 2151 offset = oadd(offset, stdoff); 2152 jtime = rp->r_temp; 2153 if (jtime == min_time || 2154 jtime == max_time) 2155 continue; 2156 jtime = tadd(jtime, -offset); 2157 if (k < 0 || jtime < ktime) { 2158 k = j; 2159 ktime = jtime; 2160 } 2161 } 2162 if (k < 0) 2163 break; /* go on to next year */ 2164 rp = &zp->z_rules[k]; 2165 rp->r_todo = FALSE; 2166 if (useuntil && ktime >= untiltime) 2167 break; 2168 stdoff = rp->r_stdoff; 2169 if (usestart && ktime == starttime) 2170 usestart = FALSE; 2171 if (usestart) { 2172 if (ktime < starttime) { 2173 startoff = oadd(zp->z_gmtoff, 2174 stdoff); 2175 doabbr(startbuf, zp->z_format, 2176 rp->r_abbrvar, 2177 rp->r_stdoff != 0, 2178 FALSE); 2179 continue; 2180 } 2181 if (*startbuf == '\0' && 2182 startoff == oadd(zp->z_gmtoff, 2183 stdoff)) { 2184 doabbr(startbuf, 2185 zp->z_format, 2186 rp->r_abbrvar, 2187 rp->r_stdoff != 2188 0, 2189 FALSE); 2190 } 2191 } 2192 eats(zp->z_filename, zp->z_linenum, 2193 rp->r_filename, rp->r_linenum); 2194 doabbr(ab, zp->z_format, rp->r_abbrvar, 2195 rp->r_stdoff != 0, FALSE); 2196 offset = oadd(zp->z_gmtoff, rp->r_stdoff); 2197 type = addtype(offset, ab, rp->r_stdoff != 0, 2198 rp->r_todisstd, rp->r_todisgmt); 2199 addtt(ktime, type); 2200 } 2201 } 2202 if (usestart) { 2203 if (*startbuf == '\0' && 2204 zp->z_format != NULL && 2205 strchr(zp->z_format, '%') == NULL && 2206 strchr(zp->z_format, '/') == NULL) 2207 strcpy(startbuf, zp->z_format); 2208 eat(zp->z_filename, zp->z_linenum); 2209 if (*startbuf == '\0') 2210 error(_("can't determine time zone abbreviation to use just after until time")); 2211 else addtt(starttime, 2212 addtype(startoff, startbuf, 2213 startoff != zp->z_gmtoff, 2214 startttisstd, 2215 startttisgmt)); 2216 } 2217 /* 2218 ** Now we may get to set starttime for the next zone line. 2219 */ 2220 if (useuntil) { 2221 startttisstd = zp->z_untilrule.r_todisstd; 2222 startttisgmt = zp->z_untilrule.r_todisgmt; 2223 starttime = zp->z_untiltime; 2224 if (!startttisstd) 2225 starttime = tadd(starttime, -stdoff); 2226 if (!startttisgmt) 2227 starttime = tadd(starttime, -gmtoff); 2228 } 2229 } 2230 if (do_extend) { 2231 /* 2232 ** If we're extending the explicitly listed observations 2233 ** for 400 years because we can't fill the POSIX-TZ field, 2234 ** check whether we actually ended up explicitly listing 2235 ** observations through that period. If there aren't any 2236 ** near the end of the 400-year period, add a redundant 2237 ** one at the end of the final year, to make it clear 2238 ** that we are claiming to have definite knowledge of 2239 ** the lack of transitions up to that point. 2240 */ 2241 struct rule xr; 2242 struct attype *lastat; 2243 xr.r_month = TM_JANUARY; 2244 xr.r_dycode = DC_DOM; 2245 xr.r_dayofmonth = 1; 2246 xr.r_tod = 0; 2247 for (lastat = &attypes[0], i = 1; i < timecnt; i++) 2248 if (attypes[i].at > lastat->at) 2249 lastat = &attypes[i]; 2250 if (lastat->at < rpytime(&xr, max_year - 1)) { 2251 /* 2252 ** Create new type code for the redundant entry, 2253 ** to prevent it being optimised away. 2254 */ 2255 if (typecnt >= TZ_MAX_TYPES) { 2256 error(_("too many local time types")); 2257 exit(EXIT_FAILURE); 2258 } 2259 gmtoffs[typecnt] = gmtoffs[lastat->type]; 2260 isdsts[typecnt] = isdsts[lastat->type]; 2261 ttisstds[typecnt] = ttisstds[lastat->type]; 2262 ttisgmts[typecnt] = ttisgmts[lastat->type]; 2263 abbrinds[typecnt] = abbrinds[lastat->type]; 2264 ++typecnt; 2265 addtt(rpytime(&xr, max_year + 1), typecnt-1); 2266 } 2267 } 2268 writezone(zpfirst->z_name, envvar, version); 2269 free(startbuf); 2270 free(ab); 2271 free(envvar); 2272 } 2273 2274 static void 2275 addtt(const zic_t starttime, int type) 2276 { 2277 if (starttime <= min_time || 2278 (timecnt == 1 && attypes[0].at < min_time)) { 2279 gmtoffs[0] = gmtoffs[type]; 2280 isdsts[0] = isdsts[type]; 2281 ttisstds[0] = ttisstds[type]; 2282 ttisgmts[0] = ttisgmts[type]; 2283 if (abbrinds[type] != 0) 2284 strcpy(chars, &chars[abbrinds[type]]); 2285 abbrinds[0] = 0; 2286 charcnt = strlen(chars) + 1; 2287 typecnt = 1; 2288 timecnt = 0; 2289 type = 0; 2290 } 2291 if (timecnt >= TZ_MAX_TIMES) { 2292 error(_("too many transitions?!")); 2293 exit(EXIT_FAILURE); 2294 } 2295 attypes[timecnt].at = starttime; 2296 attypes[timecnt].type = type; 2297 ++timecnt; 2298 } 2299 2300 static int 2301 addtype(const zic_t gmtoff, const char * const abbr, const int isdst, 2302 const int ttisstd, const int ttisgmt) 2303 { 2304 int i, j; 2305 2306 if (isdst != TRUE && isdst != FALSE) { 2307 error(_("internal error - addtype called with bad isdst")); 2308 exit(EXIT_FAILURE); 2309 } 2310 if (ttisstd != TRUE && ttisstd != FALSE) { 2311 error(_("internal error - addtype called with bad ttisstd")); 2312 exit(EXIT_FAILURE); 2313 } 2314 if (ttisgmt != TRUE && ttisgmt != FALSE) { 2315 error(_("internal error - addtype called with bad ttisgmt")); 2316 exit(EXIT_FAILURE); 2317 } 2318 /* 2319 ** See if there's already an entry for this zone type. 2320 ** If so, just return its index. 2321 */ 2322 for (i = 0; i < typecnt; ++i) { 2323 if (gmtoff == gmtoffs[i] && isdst == isdsts[i] && 2324 strcmp(abbr, &chars[abbrinds[i]]) == 0 && 2325 ttisstd == ttisstds[i] && 2326 ttisgmt == ttisgmts[i]) 2327 return i; 2328 } 2329 /* 2330 ** There isn't one; add a new one, unless there are already too 2331 ** many. 2332 */ 2333 if (typecnt >= TZ_MAX_TYPES) { 2334 error(_("too many local time types")); 2335 exit(EXIT_FAILURE); 2336 } 2337 if (! (-1L - 2147483647L <= gmtoff && gmtoff <= 2147483647L)) { 2338 error(_("UT offset out of range")); 2339 exit(EXIT_FAILURE); 2340 } 2341 gmtoffs[i] = gmtoff; 2342 isdsts[i] = isdst; 2343 ttisstds[i] = ttisstd; 2344 ttisgmts[i] = ttisgmt; 2345 2346 for (j = 0; j < charcnt; ++j) 2347 if (strcmp(&chars[j], abbr) == 0) 2348 break; 2349 if (j == charcnt) 2350 newabbr(abbr); 2351 abbrinds[i] = j; 2352 ++typecnt; 2353 return i; 2354 } 2355 2356 static void 2357 leapadd(const zic_t t, const int positive, const int rolling, int count) 2358 { 2359 int i, j; 2360 2361 if (leapcnt + (positive ? count : 1) > TZ_MAX_LEAPS) { 2362 error(_("too many leap seconds")); 2363 exit(EXIT_FAILURE); 2364 } 2365 for (i = 0; i < leapcnt; ++i) 2366 if (t <= trans[i]) { 2367 if (t == trans[i]) { 2368 error(_("repeated leap second moment")); 2369 exit(EXIT_FAILURE); 2370 } 2371 break; 2372 } 2373 do { 2374 for (j = leapcnt; j > i; --j) { 2375 trans[j] = trans[j - 1]; 2376 corr[j] = corr[j - 1]; 2377 roll[j] = roll[j - 1]; 2378 } 2379 trans[i] = t; 2380 corr[i] = positive ? 1 : -count; 2381 roll[i] = rolling; 2382 ++leapcnt; 2383 } while (positive && --count != 0); 2384 } 2385 2386 static void 2387 adjleap(void) 2388 { 2389 int i; 2390 zic_t last = 0; 2391 2392 /* 2393 ** propagate leap seconds forward 2394 */ 2395 for (i = 0; i < leapcnt; ++i) { 2396 trans[i] = tadd(trans[i], last); 2397 last = corr[i] += last; 2398 } 2399 } 2400 2401 static int 2402 yearistype(const int year, const char * const type) 2403 { 2404 static char * buf; 2405 int result; 2406 2407 if (type == NULL || *type == '\0') 2408 return TRUE; 2409 buf = erealloc(buf, (int) (132 + strlen(yitcommand) + strlen(type))); 2410 sprintf(buf, "%s %d %s", yitcommand, year, type); 2411 result = system(buf); 2412 if (WIFEXITED(result)) switch (WEXITSTATUS(result)) { 2413 case 0: 2414 return TRUE; 2415 case 1: 2416 return FALSE; 2417 } 2418 error(_("Wild result from command execution")); 2419 warnx(_("command was '%s', result was %d"), buf, result); 2420 for ( ; ; ) 2421 exit(EXIT_FAILURE); 2422 } 2423 2424 static int 2425 lowerit(int a) 2426 { 2427 a = (unsigned char) a; 2428 return (isascii(a) && isupper(a)) ? tolower(a) : a; 2429 } 2430 2431 static __pure int 2432 ciequal(const char *ap, const char *bp) /* case-insensitive equality */ 2433 { 2434 while (lowerit(*ap) == lowerit(*bp++)) 2435 if (*ap++ == '\0') 2436 return TRUE; 2437 return FALSE; 2438 } 2439 2440 static __pure int 2441 itsabbr(const char *abbr, const char *word) 2442 { 2443 if (lowerit(*abbr) != lowerit(*word)) 2444 return FALSE; 2445 ++word; 2446 while (*++abbr != '\0') 2447 do { 2448 if (*word == '\0') 2449 return FALSE; 2450 } while (lowerit(*word++) != lowerit(*abbr)); 2451 return TRUE; 2452 } 2453 2454 static __pure const struct lookup * 2455 byword(const char * const word, const struct lookup * const table) 2456 { 2457 const struct lookup *foundlp; 2458 const struct lookup *lp; 2459 2460 if (word == NULL || table == NULL) 2461 return NULL; 2462 /* 2463 ** Look for exact match. 2464 */ 2465 for (lp = table; lp->l_word != NULL; ++lp) 2466 if (ciequal(word, lp->l_word)) 2467 return lp; 2468 /* 2469 ** Look for inexact match. 2470 */ 2471 foundlp = NULL; 2472 for (lp = table; lp->l_word != NULL; ++lp) 2473 if (itsabbr(word, lp->l_word)) { 2474 if (foundlp == NULL) 2475 foundlp = lp; 2476 else return NULL; /* multiple inexact matches */ 2477 } 2478 return foundlp; 2479 } 2480 2481 static char ** 2482 getfields(char *cp) 2483 { 2484 char *dp; 2485 char **array; 2486 int nsubs; 2487 2488 if (cp == NULL) 2489 return NULL; 2490 array = emalloc((strlen(cp) + 1) * sizeof *array); 2491 nsubs = 0; 2492 for ( ; ; ) { 2493 while (isascii((unsigned char) *cp) && 2494 isspace((unsigned char) *cp)) 2495 ++cp; 2496 if (*cp == '\0' || *cp == '#') 2497 break; 2498 array[nsubs++] = dp = cp; 2499 do { 2500 if ((*dp = *cp++) != '"') 2501 ++dp; 2502 else while ((*dp = *cp++) != '"') 2503 if (*dp != '\0') 2504 ++dp; 2505 else { 2506 error(_( 2507 "Odd number of quotation marks" 2508 )); 2509 exit(1); 2510 } 2511 } while (*cp != '\0' && *cp != '#' && 2512 (!isascii(*cp) || !isspace((unsigned char) *cp))); 2513 if (isascii(*cp) && isspace((unsigned char) *cp)) 2514 ++cp; 2515 *dp = '\0'; 2516 } 2517 array[nsubs] = NULL; 2518 return array; 2519 } 2520 2521 static __pure zic_t 2522 oadd(const zic_t t1, const zic_t t2) 2523 { 2524 if (t1 < 0 ? t2 < ZIC_MIN - t1 : ZIC_MAX - t1 < t2) { 2525 error(_("time overflow")); 2526 exit(EXIT_FAILURE); 2527 } 2528 return t1 + t2; 2529 } 2530 2531 static __pure zic_t 2532 tadd(const zic_t t1, const zic_t t2) 2533 { 2534 if (t1 == max_time && t2 > 0) 2535 return max_time; 2536 if (t1 == min_time && t2 < 0) 2537 return min_time; 2538 if (t1 < 0 ? t2 < min_time - t1 : max_time - t1 < t2) { 2539 error(_("time overflow")); 2540 exit(EXIT_FAILURE); 2541 } 2542 return t1 + t2; 2543 } 2544 2545 /* 2546 ** Given a rule, and a year, compute the date - in seconds since January 1, 2547 ** 1970, 00:00 LOCAL time - in that year that the rule refers to. 2548 */ 2549 2550 static zic_t 2551 rpytime(const struct rule * const rp, const zic_t wantedy) 2552 { 2553 int m, i; 2554 zic_t dayoff; /* with a nod to Margaret O. */ 2555 zic_t t, y; 2556 2557 if (wantedy == ZIC_MIN) 2558 return min_time; 2559 if (wantedy == ZIC_MAX) 2560 return max_time; 2561 dayoff = 0; 2562 m = TM_JANUARY; 2563 y = EPOCH_YEAR; 2564 while (wantedy != y) { 2565 if (wantedy > y) { 2566 i = len_years[isleap(y)]; 2567 ++y; 2568 } else { 2569 --y; 2570 i = -len_years[isleap(y)]; 2571 } 2572 dayoff = oadd(dayoff, i); 2573 } 2574 while (m != rp->r_month) { 2575 i = len_months[isleap(y)][m]; 2576 dayoff = oadd(dayoff, i); 2577 ++m; 2578 } 2579 i = rp->r_dayofmonth; 2580 if (m == TM_FEBRUARY && i == 29 && !isleap(y)) { 2581 if (rp->r_dycode == DC_DOWLEQ) 2582 --i; 2583 else { 2584 error(_("use of 2/29 in non leap-year")); 2585 exit(EXIT_FAILURE); 2586 } 2587 } 2588 --i; 2589 dayoff = oadd(dayoff, i); 2590 if (rp->r_dycode == DC_DOWGEQ || rp->r_dycode == DC_DOWLEQ) { 2591 zic_t wday; 2592 2593 #define LDAYSPERWEEK ((zic_t) DAYSPERWEEK) 2594 wday = EPOCH_WDAY; 2595 /* 2596 ** Don't trust mod of negative numbers. 2597 */ 2598 if (dayoff >= 0) 2599 wday = (wday + dayoff) % LDAYSPERWEEK; 2600 else { 2601 wday -= ((-dayoff) % LDAYSPERWEEK); 2602 if (wday < 0) 2603 wday += LDAYSPERWEEK; 2604 } 2605 while (wday != rp->r_wday) 2606 if (rp->r_dycode == DC_DOWGEQ) { 2607 dayoff = oadd(dayoff, 1); 2608 if (++wday >= LDAYSPERWEEK) 2609 wday = 0; 2610 ++i; 2611 } else { 2612 dayoff = oadd(dayoff, -1); 2613 if (--wday < 0) 2614 wday = LDAYSPERWEEK - 1; 2615 --i; 2616 } 2617 if (i < 0 || i >= len_months[isleap(y)][m]) { 2618 if (noise) 2619 warning(_("rule goes past start/end of month--\ 2620 will not work with pre-2004 versions of zic")); 2621 } 2622 } 2623 if (dayoff < min_time / SECSPERDAY) 2624 return min_time; 2625 if (dayoff > max_time / SECSPERDAY) 2626 return max_time; 2627 t = (zic_t) dayoff * SECSPERDAY; 2628 return tadd(t, rp->r_tod); 2629 } 2630 2631 static void 2632 newabbr(const char * const string) 2633 { 2634 int i; 2635 2636 if (strcmp(string, GRANDPARENTED) != 0) { 2637 const char * cp; 2638 const char * mp; 2639 2640 /* 2641 ** Want one to ZIC_MAX_ABBR_LEN_WO_WARN alphabetics 2642 ** optionally followed by a + or - and a number from 1 to 14. 2643 */ 2644 cp = string; 2645 mp = NULL; 2646 while (isascii((unsigned char) *cp) && 2647 isalpha((unsigned char) *cp)) 2648 ++cp; 2649 if (cp - string == 0) 2650 mp = _("time zone abbreviation lacks alphabetic at start"); 2651 if (noise && cp - string < 3) 2652 mp = _("time zone abbreviation has fewer than 3 alphabetics"); 2653 if (cp - string > ZIC_MAX_ABBR_LEN_WO_WARN) 2654 mp = _("time zone abbreviation has too many alphabetics"); 2655 if (mp == NULL && (*cp == '+' || *cp == '-')) { 2656 ++cp; 2657 if (isascii((unsigned char) *cp) && 2658 isdigit((unsigned char) *cp)) 2659 if (*cp++ == '1' && 2660 *cp >= '0' && *cp <= '4') 2661 ++cp; 2662 } 2663 if (*cp != '\0') 2664 mp = _("time zone abbreviation differs from POSIX standard"); 2665 if (mp != NULL) 2666 warning("%s (%s)", mp, string); 2667 } 2668 i = strlen(string) + 1; 2669 if (charcnt + i > TZ_MAX_CHARS) { 2670 error(_("too many, or too long, time zone abbreviations")); 2671 exit(EXIT_FAILURE); 2672 } 2673 strcpy(&chars[charcnt], string); 2674 charcnt += i; 2675 } 2676 2677 static int 2678 mkdirs(char *argname) 2679 { 2680 char *name; 2681 char *cp; 2682 2683 if (argname == NULL || *argname == '\0' || Dflag) 2684 return 0; 2685 cp = name = ecpyalloc(argname); 2686 while ((cp = strchr(cp + 1, '/')) != NULL) { 2687 *cp = '\0'; 2688 #ifdef HAVE_DOS_FILE_NAMES 2689 /* 2690 ** DOS drive specifier? 2691 */ 2692 if (isalpha((unsigned char) name[0]) && 2693 name[1] == ':' && name[2] == '\0') { 2694 *cp = '/'; 2695 continue; 2696 } 2697 #endif 2698 if (!itsdir(name)) { 2699 /* 2700 ** It doesn't seem to exist, so we try to create it. 2701 ** Creation may fail because of the directory being 2702 ** created by some other multiprocessor, so we get 2703 ** to do extra checking. 2704 */ 2705 if ((mkdir(name, MKDIR_UMASK) != 0) && 2706 (errno != EEXIST || !itsdir(name))) { 2707 warn(_("can't create directory %s"), name); 2708 free(name); 2709 return -1; 2710 } 2711 } 2712 *cp = '/'; 2713 } 2714 free(name); 2715 return 0; 2716 } 2717 2718 #include <grp.h> 2719 #include <pwd.h> 2720 2721 static void 2722 setgroup(gid_t *flag, const char *name) 2723 { 2724 struct group *gr; 2725 2726 if (*flag != (gid_t)-1) 2727 errx(EXIT_FAILURE, _("multiple -g flags specified")); 2728 2729 gr = getgrnam(name); 2730 if (gr == NULL) { 2731 char *ep; 2732 unsigned long ul; 2733 2734 ul = strtoul(name, &ep, 10); 2735 if (ul == (unsigned long)(gid_t)ul && *ep == '\0') { 2736 *flag = ul; 2737 return; 2738 } 2739 errx(EXIT_FAILURE, _("group `%s' not found"), name); 2740 } 2741 *flag = gr->gr_gid; 2742 } 2743 2744 static void 2745 setuser(uid_t *flag, const char *name) 2746 { 2747 struct passwd *pw; 2748 2749 if (*flag != (gid_t)-1) 2750 errx(EXIT_FAILURE, _("multiple -u flags specified")); 2751 2752 pw = getpwnam(name); 2753 if (pw == NULL) { 2754 char *ep; 2755 unsigned long ul; 2756 2757 ul = strtoul(name, &ep, 10); 2758 if (ul == (unsigned long)(gid_t)ul && *ep == '\0') { 2759 *flag = ul; 2760 return; 2761 } 2762 errx(EXIT_FAILURE, _("user `%s' not found"), name); 2763 } 2764 *flag = pw->pw_uid; 2765 } 2766 2767 /* 2768 ** UNIX was a registered trademark of The Open Group in 2003. 2769 */ 2770