1 /* 2 ** This file is in the public domain, so clarified as of 3 ** 2006-07-17 by Arthur David Olson. 4 ** 5 ** @(#)zic.c 8.19 6 ** $FreeBSD: src/usr.sbin/zic/zic.c,v 1.11 1999/08/28 01:21:20 peter Exp $ 7 ** $DragonFly: src/usr.sbin/zic/zic.c,v 1.7 2008/10/19 20:15:58 swildner Exp $ 8 */ 9 10 #include <err.h> 11 #include <locale.h> 12 #include <sys/stat.h> /* for umask manifest constants */ 13 #include <sys/types.h> 14 #include <unistd.h> 15 #include "private.h" 16 #include "tzfile.h" 17 18 #define ZIC_VERSION '2' 19 20 typedef int_fast64_t zic_t; 21 22 #ifndef ZIC_MAX_ABBR_LEN_WO_WARN 23 #define ZIC_MAX_ABBR_LEN_WO_WARN 6 24 #endif /* !defined ZIC_MAX_ABBR_LEN_WO_WARN */ 25 26 #define MKDIR_UMASK (S_IRUSR|S_IWUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH) 27 28 /* 29 ** On some ancient hosts, predicates like `isspace(C)' are defined 30 ** only if isascii(C) || C == EOF. Modern hosts obey the C Standard, 31 ** which says they are defined only if C == ((unsigned char) C) || C == EOF. 32 ** Neither the C Standard nor Posix require that `isascii' exist. 33 ** For portability, we check both ancient and modern requirements. 34 ** If isascii is not defined, the isascii check succeeds trivially. 35 */ 36 #include "ctype.h" 37 #ifndef isascii 38 #define isascii(x) 1 39 #endif 40 41 #define OFFSET_STRLEN_MAXIMUM (7 + INT_STRLEN_MAXIMUM(long)) 42 #define RULE_STRLEN_MAXIMUM 8 /* "Mdd.dd.d" */ 43 44 #define end(cp) (strchr((cp), '\0')) 45 46 struct rule { 47 const char * r_filename; 48 int r_linenum; 49 const char * r_name; 50 51 int r_loyear; /* for example, 1986 */ 52 int r_hiyear; /* for example, 1986 */ 53 const char * r_yrtype; 54 int r_lowasnum; 55 int r_hiwasnum; 56 57 int r_month; /* 0..11 */ 58 59 int r_dycode; /* see below */ 60 int r_dayofmonth; 61 int r_wday; 62 63 long r_tod; /* time from midnight */ 64 int r_todisstd; /* above is standard time if TRUE */ 65 /* or wall clock time if FALSE */ 66 int r_todisgmt; /* above is GMT if TRUE */ 67 /* or local time if FALSE */ 68 long r_stdoff; /* offset from standard time */ 69 const char * r_abbrvar; /* variable part of abbreviation */ 70 71 int r_todo; /* a rule to do (used in outzone) */ 72 zic_t r_temp; /* used in outzone */ 73 }; 74 75 /* 76 ** r_dycode r_dayofmonth r_wday 77 */ 78 79 #define DC_DOM 0 /* 1..31 */ /* unused */ 80 #define DC_DOWGEQ 1 /* 1..31 */ /* 0..6 (Sun..Sat) */ 81 #define DC_DOWLEQ 2 /* 1..31 */ /* 0..6 (Sun..Sat) */ 82 83 struct zone { 84 const char * z_filename; 85 int z_linenum; 86 87 const char * z_name; 88 long z_gmtoff; 89 const char * z_rule; 90 const char * z_format; 91 92 long z_stdoff; 93 94 struct rule * z_rules; 95 int z_nrules; 96 97 struct rule z_untilrule; 98 zic_t z_untiltime; 99 }; 100 101 static void addtt(zic_t starttime, int type); 102 static int addtype(long gmtoff, const char *abbr, int isdst, 103 int ttisstd, int ttisgmt); 104 static void leapadd(zic_t t, int positive, int rolling, int count); 105 static void adjleap(void); 106 static void associate(void); 107 static int ciequal(const char *ap, const char *bp); 108 static void convert(long val, char *buf); 109 static void convert64(zic_t val, char *buf); 110 static void dolink(const char *fromfield, const char *tofield); 111 static void doabbr(char *abbr, const char *format, 112 const char *letters, int isdst, int doquotes); 113 static void eat(const char *name, int num); 114 static void eats(const char *name, int num, 115 const char *rname, int rnum); 116 static long eitol(int i); 117 static void error(const char *message); 118 static char ** getfields(char *buf); 119 static long gethms(const char *string, const char *errstrng, 120 int signable); 121 static void infile(const char *filename); 122 static void inleap(char **fields, int nfields); 123 static void inlink(char **fields, int nfields); 124 static void inrule(char **fields, int nfields); 125 static int inzcont(char **fields, int nfields); 126 static int inzone(char **fields, int nfields); 127 static int inzsub(char **fields, int nfields, int iscont); 128 static int is32(zic_t x); 129 static int itsabbr(const char *abbr, const char *word); 130 static int itsdir(const char *name); 131 static int lowerit(int c); 132 static char * memcheck(char *tocheck); 133 static int mkdirs(char *filename); 134 static void newabbr(const char *abbr); 135 static long oadd(long t1, long t2); 136 static void outzone(const struct zone *zp, int ntzones); 137 static void puttzcode(long code, FILE *fp); 138 static void puttzcode64(zic_t code, FILE *fp); 139 static int rcomp(const void *leftp, const void *rightp); 140 static zic_t rpytime(const struct rule *rp, int wantedy); 141 static void rulesub(struct rule *rp, 142 const char *loyearp, const char *hiyearp, 143 const char *typep, const char *monthp, 144 const char *dayp, const char *timep); 145 static int stringoffset(char *result, long offset); 146 static int stringrule(char *result, const struct rule *rp, 147 long dstoff, long gmtoff); 148 static void stringzone(char *result, 149 const struct zone *zp, int ntzones); 150 static void setboundaries(void); 151 static void setgroup(gid_t *flag, const char *name); 152 static void setuser(uid_t *flag, const char *name); 153 static zic_t tadd(const zic_t t1, const long t2); 154 static void usage(void); 155 static void writezone(const char *name, const char *string); 156 static int yearistype(int year, const char *type); 157 158 static int charcnt; 159 static int errors; 160 static const char * filename; 161 static int leapcnt; 162 static int leapseen; 163 static int leapminyear; 164 static int leapmaxyear; 165 static int linenum; 166 static int max_abbrvar_len; 167 static int max_format_len; 168 static zic_t max_time; 169 static int max_year; 170 static zic_t min_time; 171 static int min_year; 172 static int noise; 173 static const char * rfilename; 174 static int rlinenum; 175 static int timecnt; 176 static int typecnt; 177 178 /* 179 ** Line codes. 180 */ 181 182 #define LC_RULE 0 183 #define LC_ZONE 1 184 #define LC_LINK 2 185 #define LC_LEAP 3 186 187 /* 188 ** Which fields are which on a Zone line. 189 */ 190 191 #define ZF_NAME 1 192 #define ZF_GMTOFF 2 193 #define ZF_RULE 3 194 #define ZF_FORMAT 4 195 #define ZF_TILYEAR 5 196 #define ZF_TILMONTH 6 197 #define ZF_TILDAY 7 198 #define ZF_TILTIME 8 199 #define ZONE_MINFIELDS 5 200 #define ZONE_MAXFIELDS 9 201 202 /* 203 ** Which fields are which on a Zone continuation line. 204 */ 205 206 #define ZFC_GMTOFF 0 207 #define ZFC_RULE 1 208 #define ZFC_FORMAT 2 209 #define ZFC_TILYEAR 3 210 #define ZFC_TILMONTH 4 211 #define ZFC_TILDAY 5 212 #define ZFC_TILTIME 6 213 #define ZONEC_MINFIELDS 3 214 #define ZONEC_MAXFIELDS 7 215 216 /* 217 ** Which files are which on a Rule line. 218 */ 219 220 #define RF_NAME 1 221 #define RF_LOYEAR 2 222 #define RF_HIYEAR 3 223 #define RF_COMMAND 4 224 #define RF_MONTH 5 225 #define RF_DAY 6 226 #define RF_TOD 7 227 #define RF_STDOFF 8 228 #define RF_ABBRVAR 9 229 #define RULE_FIELDS 10 230 231 /* 232 ** Which fields are which on a Link line. 233 */ 234 235 #define LF_FROM 1 236 #define LF_TO 2 237 #define LINK_FIELDS 3 238 239 /* 240 ** Which fields are which on a Leap line. 241 */ 242 243 #define LP_YEAR 1 244 #define LP_MONTH 2 245 #define LP_DAY 3 246 #define LP_TIME 4 247 #define LP_CORR 5 248 #define LP_ROLL 6 249 #define LEAP_FIELDS 7 250 251 /* 252 ** Year synonyms. 253 */ 254 255 #define YR_MINIMUM 0 256 #define YR_MAXIMUM 1 257 #define YR_ONLY 2 258 259 static struct rule * rules; 260 static int nrules; /* number of rules */ 261 262 static struct zone * zones; 263 static int nzones; /* number of zones */ 264 265 struct link { 266 const char * l_filename; 267 int l_linenum; 268 const char * l_from; 269 const char * l_to; 270 }; 271 272 static struct link * links; 273 static int nlinks; 274 275 struct lookup { 276 const char * l_word; 277 const int l_value; 278 }; 279 280 static struct lookup const *byword(const char *string, 281 const struct lookup *lp); 282 283 static struct lookup const line_codes[] = { 284 { "Rule", LC_RULE }, 285 { "Zone", LC_ZONE }, 286 { "Link", LC_LINK }, 287 { "Leap", LC_LEAP }, 288 { NULL, 0} 289 }; 290 291 static struct lookup const mon_names[] = { 292 { "January", TM_JANUARY }, 293 { "February", TM_FEBRUARY }, 294 { "March", TM_MARCH }, 295 { "April", TM_APRIL }, 296 { "May", TM_MAY }, 297 { "June", TM_JUNE }, 298 { "July", TM_JULY }, 299 { "August", TM_AUGUST }, 300 { "September", TM_SEPTEMBER }, 301 { "October", TM_OCTOBER }, 302 { "November", TM_NOVEMBER }, 303 { "December", TM_DECEMBER }, 304 { NULL, 0 } 305 }; 306 307 static struct lookup const wday_names[] = { 308 { "Sunday", TM_SUNDAY }, 309 { "Monday", TM_MONDAY }, 310 { "Tuesday", TM_TUESDAY }, 311 { "Wednesday", TM_WEDNESDAY }, 312 { "Thursday", TM_THURSDAY }, 313 { "Friday", TM_FRIDAY }, 314 { "Saturday", TM_SATURDAY }, 315 { NULL, 0 } 316 }; 317 318 static struct lookup const lasts[] = { 319 { "last-Sunday", TM_SUNDAY }, 320 { "last-Monday", TM_MONDAY }, 321 { "last-Tuesday", TM_TUESDAY }, 322 { "last-Wednesday", TM_WEDNESDAY }, 323 { "last-Thursday", TM_THURSDAY }, 324 { "last-Friday", TM_FRIDAY }, 325 { "last-Saturday", TM_SATURDAY }, 326 { NULL, 0 } 327 }; 328 329 static struct lookup const begin_years[] = { 330 { "minimum", YR_MINIMUM }, 331 { "maximum", YR_MAXIMUM }, 332 { NULL, 0 } 333 }; 334 335 static struct lookup const end_years[] = { 336 { "minimum", YR_MINIMUM }, 337 { "maximum", YR_MAXIMUM }, 338 { "only", YR_ONLY }, 339 { NULL, 0 } 340 }; 341 342 static struct lookup const leap_types[] = { 343 { "Rolling", TRUE }, 344 { "Stationary", FALSE }, 345 { NULL, 0 } 346 }; 347 348 static const int len_months[2][MONSPERYEAR] = { 349 { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }, 350 { 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 } 351 }; 352 353 static const int len_years[2] = { 354 DAYSPERNYEAR, DAYSPERLYEAR 355 }; 356 357 static struct attype { 358 zic_t at; 359 unsigned char type; 360 } attypes[TZ_MAX_TIMES]; 361 static long gmtoffs[TZ_MAX_TYPES]; 362 static char isdsts[TZ_MAX_TYPES]; 363 static unsigned char abbrinds[TZ_MAX_TYPES]; 364 static char ttisstds[TZ_MAX_TYPES]; 365 static char ttisgmts[TZ_MAX_TYPES]; 366 static char chars[TZ_MAX_CHARS]; 367 static zic_t trans[TZ_MAX_LEAPS]; 368 static long corr[TZ_MAX_LEAPS]; 369 static char roll[TZ_MAX_LEAPS]; 370 371 /* 372 ** Memory allocation. 373 */ 374 375 static char * 376 memcheck(char * const ptr) 377 { 378 if (ptr == NULL) 379 errx(EXIT_FAILURE, _("memory exhausted")); 380 return ptr; 381 } 382 383 #define emalloc(size) memcheck(imalloc(size)) 384 #define erealloc(ptr, size) memcheck(irealloc((ptr), (size))) 385 #define ecpyalloc(ptr) memcheck(icpyalloc(ptr)) 386 #define ecatalloc(oldp, newp) memcheck(icatalloc((oldp), (newp))) 387 388 /* 389 ** Error handling. 390 */ 391 392 static void 393 eats(const char * const name, const int num, 394 const char * const rname, const int rnum) 395 { 396 filename = name; 397 linenum = num; 398 rfilename = rname; 399 rlinenum = rnum; 400 } 401 402 static void 403 eat(const char * const name, const int num) 404 { 405 eats(name, num, NULL, -1); 406 } 407 408 static void 409 error(const char * const string) 410 { 411 /* 412 ** Match the format of "cc" to allow sh users to 413 ** zic ... 2>&1 | error -t "*" -v 414 ** on BSD systems. 415 */ 416 fprintf(stderr, _("\"%s\", line %d: %s"), 417 filename, linenum, string); 418 if (rfilename != NULL) 419 fprintf(stderr, _(" (rule from \"%s\", line %d)"), 420 rfilename, rlinenum); 421 fprintf(stderr, "\n"); 422 ++errors; 423 } 424 425 static void 426 warning(const char * const string) 427 { 428 char * cp; 429 430 cp = ecpyalloc(_("warning: ")); 431 cp = ecatalloc(cp, string); 432 error(cp); 433 ifree(cp); 434 --errors; 435 } 436 437 static void 438 usage(void) 439 { 440 fprintf(stderr, "%s\n%s\n", 441 _("usage: zic [-v] [-l localtime] [-p posixrules] [-d directory]"), 442 _(" [-L leapseconds] [-y yearistype] [filename ...]")); 443 exit(EXIT_FAILURE); 444 } 445 446 static const char * psxrules; 447 static const char * lcltime; 448 static const char * directory; 449 static const char * leapsec; 450 static const char * yitcommand; 451 static int Dflag; 452 static uid_t uflag = (uid_t)-1; 453 static gid_t gflag = (gid_t)-1; 454 static mode_t mflag = (S_IRUSR | S_IRGRP | S_IROTH 455 | S_IWUSR); 456 457 int 458 main(int argc, char *argv[]) 459 { 460 int i; 461 int j; 462 int c; 463 464 #ifdef unix 465 umask(umask(S_IWGRP | S_IWOTH) | (S_IWGRP | S_IWOTH)); 466 #endif /* defined unix */ 467 while ((c = getopt(argc, argv, "Dd:g:l:m:p:L:u:vsy:")) != -1) 468 switch (c) { 469 default: 470 usage(); 471 case 'D': 472 Dflag = 1; 473 break; 474 case 'd': 475 if (directory == NULL) 476 directory = optarg; 477 else 478 errx(EXIT_FAILURE, 479 _("more than one -d option specified")); 480 break; 481 case 'g': 482 setgroup(&gflag, optarg); 483 break; 484 case 'l': 485 if (lcltime == NULL) 486 lcltime = optarg; 487 else 488 errx(EXIT_FAILURE, 489 _("more than one -l option specified")); 490 break; 491 case 'm': 492 { 493 void *set = setmode(optarg); 494 getmode(set, mflag); 495 break; 496 } 497 case 'p': 498 if (psxrules == NULL) 499 psxrules = optarg; 500 else 501 errx(EXIT_FAILURE, 502 _("more than one -p option specified")); 503 break; 504 case 'u': 505 setuser(&uflag, optarg); 506 break; 507 case 'y': 508 if (yitcommand == NULL) 509 yitcommand = optarg; 510 else 511 errx(EXIT_FAILURE, 512 _("more than one -y option specified")); 513 break; 514 case 'L': 515 if (leapsec == NULL) 516 leapsec = optarg; 517 else 518 errx(EXIT_FAILURE, 519 _("more than one -L option specified")); 520 break; 521 case 'v': 522 noise = TRUE; 523 break; 524 case 's': 525 warnx(_("-s ignored\n")); 526 break; 527 } 528 if (optind == argc - 1 && strcmp(argv[optind], "=") == 0) 529 usage(); /* usage message by request */ 530 if (directory == NULL) 531 directory = TZDIR; 532 if (yitcommand == NULL) 533 yitcommand = "yearistype"; 534 535 setboundaries(); 536 537 if (optind < argc && leapsec != NULL) { 538 infile(leapsec); 539 adjleap(); 540 } 541 542 for (i = optind; i < argc; ++i) 543 infile(argv[i]); 544 if (errors) 545 exit(EXIT_FAILURE); 546 associate(); 547 for (i = 0; i < nzones; i = j) { 548 /* 549 ** Find the next non-continuation zone entry. 550 */ 551 for (j = i + 1; j < nzones && zones[j].z_name == NULL; ++j) 552 continue; 553 outzone(&zones[i], j - i); 554 } 555 /* 556 ** Make links. 557 */ 558 for (i = 0; i < nlinks; ++i) { 559 eat(links[i].l_filename, links[i].l_linenum); 560 dolink(links[i].l_from, links[i].l_to); 561 if (noise) 562 for (j = 0; j < nlinks; ++j) 563 if (strcmp(links[i].l_to, 564 links[j].l_from) == 0) 565 warning(_("link to link")); 566 } 567 if (lcltime != NULL) { 568 eat("command line", 1); 569 dolink(lcltime, TZDEFAULT); 570 } 571 if (psxrules != NULL) { 572 eat("command line", 1); 573 dolink(psxrules, TZDEFRULES); 574 } 575 return (errors == 0) ? EXIT_SUCCESS : EXIT_FAILURE; 576 } 577 578 static void 579 dolink(const char * const fromfield, const char * const tofield) 580 { 581 char *fromname; 582 char *toname; 583 584 if (fromfield[0] == '/') 585 fromname = ecpyalloc(fromfield); 586 else { 587 fromname = ecpyalloc(directory); 588 fromname = ecatalloc(fromname, "/"); 589 fromname = ecatalloc(fromname, fromfield); 590 } 591 if (tofield[0] == '/') 592 toname = ecpyalloc(tofield); 593 else { 594 toname = ecpyalloc(directory); 595 toname = ecatalloc(toname, "/"); 596 toname = ecatalloc(toname, tofield); 597 } 598 /* 599 ** We get to be careful here since 600 ** there's a fair chance of root running us. 601 */ 602 if (!itsdir(toname)) 603 remove(toname); 604 if (link(fromname, toname) != 0) { 605 int result; 606 607 if (mkdirs(toname) != 0) 608 exit(EXIT_FAILURE); 609 610 result = link(fromname, toname); 611 if (result != 0 && 612 access(fromname, F_OK) == 0 && 613 !itsdir(fromname)) { 614 const char *s = tofield; 615 char * symlinkcontents = NULL; 616 617 while ((s = strchr(s+1, '/')) != NULL) 618 symlinkcontents = 619 ecatalloc(symlinkcontents, 620 "../"); 621 symlinkcontents = 622 ecatalloc(symlinkcontents, 623 fromname); 624 result = symlink(symlinkcontents, 625 toname); 626 if (result == 0) 627 warning(_("hard link failed, symbolic link used")); 628 ifree(symlinkcontents); 629 } 630 if (result != 0) { 631 err(EXIT_FAILURE, _("can't link from %s to %s"), 632 fromname, toname); 633 } 634 } 635 ifree(fromname); 636 ifree(toname); 637 } 638 639 #define TIME_T_BITS_IN_FILE 64 640 641 static void 642 setboundaries(void) 643 { 644 int i; 645 646 min_time = -1; 647 for (i = 0; i < TIME_T_BITS_IN_FILE - 1; ++i) 648 min_time *= 2; 649 max_time = -(min_time + 1); 650 } 651 652 static int 653 itsdir(const char * const name) 654 { 655 char * myname; 656 int accres; 657 658 myname = ecpyalloc(name); 659 myname = ecatalloc(myname, "/."); 660 accres = access(myname, F_OK); 661 ifree(myname); 662 return accres == 0; 663 } 664 665 /* 666 ** Associate sets of rules with zones. 667 */ 668 669 /* 670 ** Sort by rule name. 671 */ 672 673 static int 674 rcomp(const void *cp1, const void *cp2) 675 { 676 return strcmp(((const struct rule *) cp1)->r_name, 677 ((const struct rule *) cp2)->r_name); 678 } 679 680 static void 681 associate(void) 682 { 683 struct zone *zp; 684 struct rule *rp; 685 int base, out; 686 int i, j; 687 688 if (nrules != 0) { 689 qsort((void *) rules, (size_t) nrules, 690 (size_t) sizeof *rules, rcomp); 691 for (i = 0; i < nrules - 1; ++i) { 692 if (strcmp(rules[i].r_name, 693 rules[i + 1].r_name) != 0) 694 continue; 695 if (strcmp(rules[i].r_filename, 696 rules[i + 1].r_filename) == 0) 697 continue; 698 eat(rules[i].r_filename, rules[i].r_linenum); 699 warning(_("same rule name in multiple files")); 700 eat(rules[i + 1].r_filename, rules[i + 1].r_linenum); 701 warning(_("same rule name in multiple files")); 702 for (j = i + 2; j < nrules; ++j) { 703 if (strcmp(rules[i].r_name, 704 rules[j].r_name) != 0) 705 break; 706 if (strcmp(rules[i].r_filename, 707 rules[j].r_filename) == 0) 708 continue; 709 if (strcmp(rules[i + 1].r_filename, 710 rules[j].r_filename) == 0) 711 continue; 712 break; 713 } 714 i = j - 1; 715 } 716 } 717 for (i = 0; i < nzones; ++i) { 718 zp = &zones[i]; 719 zp->z_rules = NULL; 720 zp->z_nrules = 0; 721 } 722 for (base = 0; base < nrules; base = out) { 723 rp = &rules[base]; 724 for (out = base + 1; out < nrules; ++out) 725 if (strcmp(rp->r_name, rules[out].r_name) != 0) 726 break; 727 for (i = 0; i < nzones; ++i) { 728 zp = &zones[i]; 729 if (strcmp(zp->z_rule, rp->r_name) != 0) 730 continue; 731 zp->z_rules = rp; 732 zp->z_nrules = out - base; 733 } 734 } 735 for (i = 0; i < nzones; ++i) { 736 zp = &zones[i]; 737 if (zp->z_nrules == 0) { 738 /* 739 ** Maybe we have a local standard time offset. 740 */ 741 eat(zp->z_filename, zp->z_linenum); 742 zp->z_stdoff = gethms(zp->z_rule, _("unruly zone"), 743 TRUE); 744 /* 745 ** Note, though, that if there's no rule, 746 ** a '%s' in the format is a bad thing. 747 */ 748 if (strchr(zp->z_format, '%') != 0) 749 error(_("%s in ruleless zone")); 750 } 751 } 752 if (errors) 753 exit(EXIT_FAILURE); 754 } 755 756 static void 757 infile(const char *name) 758 { 759 FILE *fp; 760 char **fields; 761 char *cp; 762 const struct lookup *lp; 763 int nfields; 764 int wantcont; 765 int num; 766 char buf[BUFSIZ]; 767 768 if (strcmp(name, "-") == 0) { 769 name = _("standard input"); 770 fp = stdin; 771 } else if ((fp = fopen(name, "r")) == NULL) 772 err(EXIT_FAILURE, _("can't open %s"), name); 773 wantcont = FALSE; 774 for (num = 1; ; ++num) { 775 eat(name, num); 776 if (fgets(buf, (int) sizeof buf, fp) != buf) 777 break; 778 cp = strchr(buf, '\n'); 779 if (cp == NULL) { 780 error(_("line too long")); 781 exit(EXIT_FAILURE); 782 } 783 *cp = '\0'; 784 fields = getfields(buf); 785 nfields = 0; 786 while (fields[nfields] != NULL) { 787 static char nada; 788 789 if (strcmp(fields[nfields], "-") == 0) 790 fields[nfields] = &nada; 791 ++nfields; 792 } 793 if (nfields == 0) { 794 /* nothing to do */ 795 } else if (wantcont) { 796 wantcont = inzcont(fields, nfields); 797 } else { 798 lp = byword(fields[0], line_codes); 799 if (lp == NULL) 800 error(_("input line of unknown type")); 801 else switch ((int) (lp->l_value)) { 802 case LC_RULE: 803 inrule(fields, nfields); 804 wantcont = FALSE; 805 break; 806 case LC_ZONE: 807 wantcont = inzone(fields, nfields); 808 break; 809 case LC_LINK: 810 inlink(fields, nfields); 811 wantcont = FALSE; 812 break; 813 case LC_LEAP: 814 if (name != leapsec) 815 warnx( 816 _("leap line in non leap seconds file %s"), name); 817 else inleap(fields, nfields); 818 wantcont = FALSE; 819 break; 820 default: /* "cannot happen" */ 821 errx(EXIT_FAILURE, 822 _("panic: invalid l_value %d"), lp->l_value); 823 } 824 } 825 ifree((char *) fields); 826 } 827 if (ferror(fp)) 828 errx(EXIT_FAILURE, _("error reading %s"), filename); 829 if (fp != stdin && fclose(fp)) 830 err(EXIT_FAILURE, _("error closing %s"), filename); 831 if (wantcont) 832 error(_("expected continuation line not found")); 833 } 834 835 /* 836 ** Convert a string of one of the forms 837 ** h -h hh:mm -hh:mm hh:mm:ss -hh:mm:ss 838 ** into a number of seconds. 839 ** A null string maps to zero. 840 ** Call error with errstring and return zero on errors. 841 */ 842 843 static long 844 gethms(const char *string, const char * const errstring, const int signable) 845 { 846 long hh; 847 int mm, ss, sign; 848 849 if (string == NULL || *string == '\0') 850 return 0; 851 if (!signable) 852 sign = 1; 853 else if (*string == '-') { 854 sign = -1; 855 ++string; 856 } else sign = 1; 857 if (sscanf(string, scheck(string, "%ld"), &hh) == 1) 858 mm = ss = 0; 859 else if (sscanf(string, scheck(string, "%ld:%d"), &hh, &mm) == 2) 860 ss = 0; 861 else if (sscanf(string, scheck(string, "%ld:%d:%d"), 862 &hh, &mm, &ss) != 3) { 863 error(errstring); 864 return 0; 865 } 866 if (hh < 0 || 867 mm < 0 || mm >= MINSPERHOUR || 868 ss < 0 || ss > SECSPERMIN) { 869 error(errstring); 870 return 0; 871 } 872 if (LONG_MAX / SECSPERHOUR < hh) { 873 error(_("time overflow")); 874 return 0; 875 } 876 if (noise && hh == HOURSPERDAY && mm == 0 && ss == 0) 877 warning(_("24:00 not handled by pre-1998 versions of zic")); 878 if (noise && (hh > HOURSPERDAY || 879 (hh == HOURSPERDAY && (mm != 0 || ss != 0)))) 880 warning(_("values over 24 hours not handled by pre-2007 versions of zic")); 881 return oadd(eitol(sign) * hh * eitol(SECSPERHOUR), 882 eitol(sign) * (eitol(mm) * eitol(SECSPERMIN) + eitol(ss))); 883 } 884 885 static void 886 inrule(char ** const fields, const int nfields) 887 { 888 static struct rule r; 889 890 if (nfields != RULE_FIELDS) { 891 error(_("wrong number of fields on Rule line")); 892 return; 893 } 894 if (*fields[RF_NAME] == '\0') { 895 error(_("nameless rule")); 896 return; 897 } 898 r.r_filename = filename; 899 r.r_linenum = linenum; 900 r.r_stdoff = gethms(fields[RF_STDOFF], _("invalid saved time"), TRUE); 901 rulesub(&r, fields[RF_LOYEAR], fields[RF_HIYEAR], fields[RF_COMMAND], 902 fields[RF_MONTH], fields[RF_DAY], fields[RF_TOD]); 903 r.r_name = ecpyalloc(fields[RF_NAME]); 904 r.r_abbrvar = ecpyalloc(fields[RF_ABBRVAR]); 905 if (max_abbrvar_len < strlen(r.r_abbrvar)) 906 max_abbrvar_len = strlen(r.r_abbrvar); 907 rules = (struct rule *) (void *) erealloc((char *) rules, 908 (int) ((nrules + 1) * sizeof *rules)); 909 rules[nrules++] = r; 910 } 911 912 static int 913 inzone(char ** const fields, const int nfields) 914 { 915 int i; 916 static char *buf; 917 918 if (nfields < ZONE_MINFIELDS || nfields > ZONE_MAXFIELDS) { 919 error(_("wrong number of fields on Zone line")); 920 return FALSE; 921 } 922 if (strcmp(fields[ZF_NAME], TZDEFAULT) == 0 && lcltime != NULL) { 923 buf = erealloc(buf, (int) (132 + strlen(TZDEFAULT))); 924 sprintf(buf, 925 _("\"Zone %s\" line and -l option are mutually exclusive"), 926 TZDEFAULT); 927 error(buf); 928 return FALSE; 929 } 930 if (strcmp(fields[ZF_NAME], TZDEFRULES) == 0 && psxrules != NULL) { 931 buf = erealloc(buf, (int) (132 + strlen(TZDEFRULES))); 932 sprintf(buf, 933 _("\"Zone %s\" line and -p option are mutually exclusive"), 934 TZDEFRULES); 935 error(buf); 936 return FALSE; 937 } 938 for (i = 0; i < nzones; ++i) 939 if (zones[i].z_name != NULL && 940 strcmp(zones[i].z_name, fields[ZF_NAME]) == 0) { 941 buf = erealloc(buf, (int) (132 + 942 strlen(fields[ZF_NAME]) + 943 strlen(zones[i].z_filename))); 944 sprintf(buf, 945 _("duplicate zone name %s (file \"%s\", line %d)"), 946 fields[ZF_NAME], 947 zones[i].z_filename, 948 zones[i].z_linenum); 949 error(buf); 950 return FALSE; 951 } 952 return inzsub(fields, nfields, FALSE); 953 } 954 955 static int 956 inzcont(char ** const fields, const int nfields) 957 { 958 if (nfields < ZONEC_MINFIELDS || nfields > ZONEC_MAXFIELDS) { 959 error(_("wrong number of fields on Zone continuation line")); 960 return FALSE; 961 } 962 return inzsub(fields, nfields, TRUE); 963 } 964 965 static int 966 inzsub(char ** const fields, const int nfields, const int iscont) 967 { 968 char *cp; 969 static struct zone z; 970 int i_gmtoff, i_rule, i_format; 971 int i_untilyear, i_untilmonth; 972 int i_untilday, i_untiltime; 973 int hasuntil; 974 975 if (iscont) { 976 i_gmtoff = ZFC_GMTOFF; 977 i_rule = ZFC_RULE; 978 i_format = ZFC_FORMAT; 979 i_untilyear = ZFC_TILYEAR; 980 i_untilmonth = ZFC_TILMONTH; 981 i_untilday = ZFC_TILDAY; 982 i_untiltime = ZFC_TILTIME; 983 z.z_name = NULL; 984 } else { 985 i_gmtoff = ZF_GMTOFF; 986 i_rule = ZF_RULE; 987 i_format = ZF_FORMAT; 988 i_untilyear = ZF_TILYEAR; 989 i_untilmonth = ZF_TILMONTH; 990 i_untilday = ZF_TILDAY; 991 i_untiltime = ZF_TILTIME; 992 z.z_name = ecpyalloc(fields[ZF_NAME]); 993 } 994 z.z_filename = filename; 995 z.z_linenum = linenum; 996 z.z_gmtoff = gethms(fields[i_gmtoff], _("invalid UTC offset"), TRUE); 997 if ((cp = strchr(fields[i_format], '%')) != 0) { 998 if (*++cp != 's' || strchr(cp, '%') != 0) { 999 error(_("invalid abbreviation format")); 1000 return FALSE; 1001 } 1002 } 1003 z.z_rule = ecpyalloc(fields[i_rule]); 1004 z.z_format = ecpyalloc(fields[i_format]); 1005 if (max_format_len < strlen(z.z_format)) 1006 max_format_len = strlen(z.z_format); 1007 hasuntil = nfields > i_untilyear; 1008 if (hasuntil) { 1009 z.z_untilrule.r_filename = filename; 1010 z.z_untilrule.r_linenum = linenum; 1011 rulesub(&z.z_untilrule, 1012 fields[i_untilyear], 1013 "only", 1014 "", 1015 (nfields > i_untilmonth) ? 1016 fields[i_untilmonth] : "Jan", 1017 (nfields > i_untilday) ? fields[i_untilday] : "1", 1018 (nfields > i_untiltime) ? fields[i_untiltime] : "0"); 1019 z.z_untiltime = rpytime(&z.z_untilrule, 1020 z.z_untilrule.r_loyear); 1021 if (iscont && nzones > 0 && 1022 z.z_untiltime > min_time && 1023 z.z_untiltime < max_time && 1024 zones[nzones - 1].z_untiltime > min_time && 1025 zones[nzones - 1].z_untiltime < max_time && 1026 zones[nzones - 1].z_untiltime >= z.z_untiltime) { 1027 error(_( 1028 "Zone continuation line end time is not after end time of previous line" 1029 )); 1030 return FALSE; 1031 } 1032 } 1033 zones = (struct zone *) (void *) erealloc((char *) zones, 1034 (int) ((nzones + 1) * sizeof *zones)); 1035 zones[nzones++] = z; 1036 /* 1037 ** If there was an UNTIL field on this line, 1038 ** there's more information about the zone on the next line. 1039 */ 1040 return hasuntil; 1041 } 1042 1043 static void 1044 inleap(char ** const fields, const int nfields) 1045 { 1046 const char *cp; 1047 const struct lookup *lp; 1048 int i, j; 1049 int year, month, day; 1050 long dayoff, tod; 1051 zic_t t; 1052 1053 if (nfields != LEAP_FIELDS) { 1054 error(_("wrong number of fields on Leap line")); 1055 return; 1056 } 1057 dayoff = 0; 1058 cp = fields[LP_YEAR]; 1059 if (sscanf(cp, scheck(cp, "%d"), &year) != 1) { 1060 /* 1061 ** Leapin' Lizards! 1062 */ 1063 error(_("invalid leaping year")); 1064 return; 1065 } 1066 if (!leapseen || leapmaxyear < year) 1067 leapmaxyear = year; 1068 if (!leapseen || leapminyear > year) 1069 leapminyear = year; 1070 leapseen = TRUE; 1071 j = EPOCH_YEAR; 1072 while (j != year) { 1073 if (year > j) { 1074 i = len_years[isleap(j)]; 1075 ++j; 1076 } else { 1077 --j; 1078 i = -len_years[isleap(j)]; 1079 } 1080 dayoff = oadd(dayoff, eitol(i)); 1081 } 1082 if ((lp = byword(fields[LP_MONTH], mon_names)) == NULL) { 1083 error(_("invalid month name")); 1084 return; 1085 } 1086 month = lp->l_value; 1087 j = TM_JANUARY; 1088 while (j != month) { 1089 i = len_months[isleap(year)][j]; 1090 dayoff = oadd(dayoff, eitol(i)); 1091 ++j; 1092 } 1093 cp = fields[LP_DAY]; 1094 if (sscanf(cp, scheck(cp, "%d"), &day) != 1 || 1095 day <= 0 || day > len_months[isleap(year)][month]) { 1096 error(_("invalid day of month")); 1097 return; 1098 } 1099 dayoff = oadd(dayoff, eitol(day - 1)); 1100 if (dayoff < 0 && !TYPE_SIGNED(zic_t)) { 1101 error(_("time before zero")); 1102 return; 1103 } 1104 if (dayoff < min_time / SECSPERDAY) { 1105 error(_("time too small")); 1106 return; 1107 } 1108 if (dayoff > max_time / SECSPERDAY) { 1109 error(_("time too large")); 1110 return; 1111 } 1112 t = (zic_t) dayoff * SECSPERDAY; 1113 tod = gethms(fields[LP_TIME], _("invalid time of day"), FALSE); 1114 cp = fields[LP_CORR]; 1115 { 1116 int positive; 1117 int count; 1118 1119 if (strcmp(cp, "") == 0) { /* infile() turns "-" into "" */ 1120 positive = FALSE; 1121 count = 1; 1122 } else if (strcmp(cp, "--") == 0) { 1123 positive = FALSE; 1124 count = 2; 1125 } else if (strcmp(cp, "+") == 0) { 1126 positive = TRUE; 1127 count = 1; 1128 } else if (strcmp(cp, "++") == 0) { 1129 positive = TRUE; 1130 count = 2; 1131 } else { 1132 error(_("illegal CORRECTION field on Leap line")); 1133 return; 1134 } 1135 if ((lp = byword(fields[LP_ROLL], leap_types)) == NULL) { 1136 error(_( 1137 "illegal Rolling/Stationary field on Leap line" 1138 )); 1139 return; 1140 } 1141 leapadd(tadd(t, tod), positive, lp->l_value, count); 1142 } 1143 } 1144 1145 static void 1146 inlink(char ** const fields, const int nfields) 1147 { 1148 struct link l; 1149 1150 if (nfields != LINK_FIELDS) { 1151 error(_("wrong number of fields on Link line")); 1152 return; 1153 } 1154 if (*fields[LF_FROM] == '\0') { 1155 error(_("blank FROM field on Link line")); 1156 return; 1157 } 1158 if (*fields[LF_TO] == '\0') { 1159 error(_("blank TO field on Link line")); 1160 return; 1161 } 1162 l.l_filename = filename; 1163 l.l_linenum = linenum; 1164 l.l_from = ecpyalloc(fields[LF_FROM]); 1165 l.l_to = ecpyalloc(fields[LF_TO]); 1166 links = (struct link *) (void *) erealloc((char *) links, 1167 (int) ((nlinks + 1) * sizeof *links)); 1168 links[nlinks++] = l; 1169 } 1170 1171 static void 1172 rulesub(struct rule * const rp, 1173 const char * const loyearp, 1174 const char * const hiyearp, 1175 const char * const typep, 1176 const char * const monthp, 1177 const char * const dayp, 1178 const char * const timep) 1179 { 1180 const struct lookup *lp; 1181 const char *cp; 1182 char *dp; 1183 char *ep; 1184 1185 if ((lp = byword(monthp, mon_names)) == NULL) { 1186 error(_("invalid month name")); 1187 return; 1188 } 1189 rp->r_month = lp->l_value; 1190 rp->r_todisstd = FALSE; 1191 rp->r_todisgmt = FALSE; 1192 dp = ecpyalloc(timep); 1193 if (*dp != '\0') { 1194 ep = dp + strlen(dp) - 1; 1195 switch (lowerit(*ep)) { 1196 case 's': /* Standard */ 1197 rp->r_todisstd = TRUE; 1198 rp->r_todisgmt = FALSE; 1199 *ep = '\0'; 1200 break; 1201 case 'w': /* Wall */ 1202 rp->r_todisstd = FALSE; 1203 rp->r_todisgmt = FALSE; 1204 *ep = '\0'; 1205 break; 1206 case 'g': /* Greenwich */ 1207 case 'u': /* Universal */ 1208 case 'z': /* Zulu */ 1209 rp->r_todisstd = TRUE; 1210 rp->r_todisgmt = TRUE; 1211 *ep = '\0'; 1212 break; 1213 } 1214 } 1215 rp->r_tod = gethms(dp, _("invalid time of day"), FALSE); 1216 ifree(dp); 1217 /* 1218 ** Year work. 1219 */ 1220 cp = loyearp; 1221 lp = byword(cp, begin_years); 1222 rp->r_lowasnum = lp == NULL; 1223 if (!rp->r_lowasnum) switch ((int) lp->l_value) { 1224 case YR_MINIMUM: 1225 rp->r_loyear = INT_MIN; 1226 break; 1227 case YR_MAXIMUM: 1228 rp->r_loyear = INT_MAX; 1229 break; 1230 default: /* "cannot happen" */ 1231 errx(EXIT_FAILURE, 1232 _("panic: invalid l_value %d"), lp->l_value); 1233 } else if (sscanf(cp, scheck(cp, "%d"), &rp->r_loyear) != 1) { 1234 error(_("invalid starting year")); 1235 return; 1236 } 1237 cp = hiyearp; 1238 lp = byword(cp, end_years); 1239 rp->r_hiwasnum = lp == NULL; 1240 if (!rp->r_hiwasnum) switch ((int) lp->l_value) { 1241 case YR_MINIMUM: 1242 rp->r_hiyear = INT_MIN; 1243 break; 1244 case YR_MAXIMUM: 1245 rp->r_hiyear = INT_MAX; 1246 break; 1247 case YR_ONLY: 1248 rp->r_hiyear = rp->r_loyear; 1249 break; 1250 default: /* "cannot happen" */ 1251 errx(EXIT_FAILURE, 1252 _("panic: invalid l_value %d"), lp->l_value); 1253 } else if (sscanf(cp, scheck(cp, "%d"), &rp->r_hiyear) != 1) { 1254 error(_("invalid ending year")); 1255 return; 1256 } 1257 if (rp->r_loyear > rp->r_hiyear) { 1258 error(_("starting year greater than ending year")); 1259 return; 1260 } 1261 if (*typep == '\0') 1262 rp->r_yrtype = NULL; 1263 else { 1264 if (rp->r_loyear == rp->r_hiyear) { 1265 error(_("typed single year")); 1266 return; 1267 } 1268 rp->r_yrtype = ecpyalloc(typep); 1269 } 1270 /* 1271 ** Day work. 1272 ** Accept things such as: 1273 ** 1 1274 ** last-Sunday 1275 ** Sun<=20 1276 ** Sun>=7 1277 */ 1278 dp = ecpyalloc(dayp); 1279 if ((lp = byword(dp, lasts)) != NULL) { 1280 rp->r_dycode = DC_DOWLEQ; 1281 rp->r_wday = lp->l_value; 1282 rp->r_dayofmonth = len_months[1][rp->r_month]; 1283 } else { 1284 if ((ep = strchr(dp, '<')) != 0) 1285 rp->r_dycode = DC_DOWLEQ; 1286 else if ((ep = strchr(dp, '>')) != 0) 1287 rp->r_dycode = DC_DOWGEQ; 1288 else { 1289 ep = dp; 1290 rp->r_dycode = DC_DOM; 1291 } 1292 if (rp->r_dycode != DC_DOM) { 1293 *ep++ = 0; 1294 if (*ep++ != '=') { 1295 error(_("invalid day of month")); 1296 ifree(dp); 1297 return; 1298 } 1299 if ((lp = byword(dp, wday_names)) == NULL) { 1300 error(_("invalid weekday name")); 1301 ifree(dp); 1302 return; 1303 } 1304 rp->r_wday = lp->l_value; 1305 } 1306 if (sscanf(ep, scheck(ep, "%d"), &rp->r_dayofmonth) != 1 || 1307 rp->r_dayofmonth <= 0 || 1308 (rp->r_dayofmonth > len_months[1][rp->r_month])) { 1309 error(_("invalid day of month")); 1310 ifree(dp); 1311 return; 1312 } 1313 } 1314 ifree(dp); 1315 } 1316 1317 static void 1318 convert(const long val, char * const buf) 1319 { 1320 int i; 1321 int shift; 1322 1323 for (i = 0, shift = 24; i < 4; ++i, shift -= 8) 1324 buf[i] = val >> shift; 1325 } 1326 1327 static void 1328 convert64(const zic_t val, char * const buf) 1329 { 1330 int i; 1331 int shift; 1332 1333 for (i = 0, shift = 56; i < 8; ++i, shift -= 8) 1334 buf[i] = val >> shift; 1335 } 1336 1337 static void 1338 puttzcode(const long val, FILE * const fp) 1339 { 1340 char buf[4]; 1341 1342 convert(val, buf); 1343 fwrite((void *) buf, (size_t) sizeof buf, (size_t) 1, fp); 1344 } 1345 1346 static void 1347 puttzcode64(const zic_t val, FILE * const fp) 1348 { 1349 char buf[8]; 1350 1351 convert64(val, buf); 1352 fwrite((void *) buf, (size_t) sizeof buf, (size_t) 1, fp); 1353 } 1354 1355 static int 1356 atcomp(const void * avp, const void * bvp) 1357 { 1358 const zic_t a = ((const struct attype *) avp)->at; 1359 const zic_t b = ((const struct attype *) bvp)->at; 1360 1361 return (a < b) ? -1 : (a > b); 1362 } 1363 1364 static int 1365 is32(const zic_t x) 1366 { 1367 return INT32_MIN <= x && x <= INT32_MAX; 1368 } 1369 1370 static void 1371 writezone(const char * const name, const char * const string) 1372 { 1373 FILE * fp; 1374 int i, j; 1375 int leapcnt32, leapi32; 1376 int timecnt32, timei32; 1377 int pass; 1378 static char * fullname; 1379 static const struct tzhead tzh0; 1380 static struct tzhead tzh; 1381 zic_t ats[TZ_MAX_TIMES]; 1382 unsigned char types[TZ_MAX_TIMES]; 1383 1384 /* 1385 ** Sort. 1386 */ 1387 if (timecnt > 1) 1388 qsort((void *) attypes, (size_t) timecnt, 1389 (size_t) sizeof *attypes, atcomp); 1390 /* 1391 ** Optimize. 1392 */ 1393 { 1394 int fromi; 1395 int toi; 1396 1397 toi = 0; 1398 fromi = 0; 1399 while (fromi < timecnt && attypes[fromi].at < min_time) 1400 ++fromi; 1401 if (isdsts[0] == 0) 1402 while (fromi < timecnt && attypes[fromi].type == 0) 1403 ++fromi; /* handled by default rule */ 1404 for ( ; fromi < timecnt; ++fromi) { 1405 if (toi != 0 && ((attypes[fromi].at + 1406 gmtoffs[attypes[toi - 1].type]) <= 1407 (attypes[toi - 1].at + gmtoffs[toi == 1 ? 0 1408 : attypes[toi - 2].type]))) { 1409 attypes[toi - 1].type = 1410 attypes[fromi].type; 1411 continue; 1412 } 1413 if (toi == 0 || 1414 attypes[toi - 1].type != attypes[fromi].type) 1415 attypes[toi++] = attypes[fromi]; 1416 } 1417 timecnt = toi; 1418 } 1419 /* 1420 ** Transfer. 1421 */ 1422 for (i = 0; i < timecnt; ++i) { 1423 ats[i] = attypes[i].at; 1424 types[i] = attypes[i].type; 1425 } 1426 /* 1427 ** Correct for leap seconds. 1428 */ 1429 for (i = 0; i < timecnt; ++i) { 1430 j = leapcnt; 1431 while (--j >= 0) 1432 if (ats[i] > trans[j] - corr[j]) { 1433 ats[i] = tadd(ats[i], corr[j]); 1434 break; 1435 } 1436 } 1437 /* 1438 ** Figure out 32-bit-limited starts and counts. 1439 */ 1440 timecnt32 = timecnt; 1441 timei32 = 0; 1442 leapcnt32 = leapcnt; 1443 leapi32 = 0; 1444 while (timecnt32 > 0 && !is32(ats[timecnt32 - 1])) 1445 --timecnt32; 1446 while (timecnt32 > 0 && !is32(ats[timei32])) { 1447 --timecnt32; 1448 ++timei32; 1449 } 1450 while (leapcnt32 > 0 && !is32(trans[leapcnt32 - 1])) 1451 --leapcnt32; 1452 while (leapcnt32 > 0 && !is32(trans[leapi32])) { 1453 --leapcnt32; 1454 ++leapi32; 1455 } 1456 fullname = erealloc(fullname, 1457 (int) (strlen(directory) + 1 + strlen(name) + 1)); 1458 sprintf(fullname, "%s/%s", directory, name); 1459 /* 1460 ** Remove old file, if any, to snap links. 1461 */ 1462 if (!itsdir(fullname) && remove(fullname) != 0 && errno != ENOENT) 1463 err(EXIT_FAILURE, _("can't remove %s"), fullname); 1464 if ((fp = fopen(fullname, "wb")) == NULL) { 1465 if (mkdirs(fullname) != 0) 1466 exit(EXIT_FAILURE); 1467 if ((fp = fopen(fullname, "wb")) == NULL) 1468 err(EXIT_FAILURE, _("can't create %s"), fullname); 1469 } 1470 for (pass = 1; pass <= 2; ++pass) { 1471 int thistimei, thistimecnt; 1472 int thisleapi, thisleapcnt; 1473 int thistimelim, thisleaplim; 1474 int writetype[TZ_MAX_TIMES]; 1475 int typemap[TZ_MAX_TYPES]; 1476 int thistypecnt; 1477 char thischars[TZ_MAX_CHARS]; 1478 char thischarcnt; 1479 int indmap[TZ_MAX_CHARS]; 1480 1481 if (pass == 1) { 1482 thistimei = timei32; 1483 thistimecnt = timecnt32; 1484 thisleapi = leapi32; 1485 thisleapcnt = leapcnt32; 1486 } else { 1487 thistimei = 0; 1488 thistimecnt = timecnt; 1489 thisleapi = 0; 1490 thisleapcnt = leapcnt; 1491 } 1492 thistimelim = thistimei + thistimecnt; 1493 thisleaplim = thisleapi + thisleapcnt; 1494 for (i = 0; i < typecnt; ++i) 1495 writetype[i] = thistimecnt == timecnt; 1496 if (thistimecnt == 0) { 1497 /* 1498 ** No transition times fall in the current 1499 ** (32- or 64-bit) window. 1500 */ 1501 if (typecnt != 0) 1502 writetype[typecnt - 1] = TRUE; 1503 } else { 1504 for (i = thistimei - 1; i < thistimelim; ++i) 1505 if (i >= 0) 1506 writetype[types[i]] = TRUE; 1507 /* 1508 ** For America/Godthab and Antarctica/Palmer 1509 */ 1510 if (thistimei == 0) 1511 writetype[0] = TRUE; 1512 } 1513 thistypecnt = 0; 1514 for (i = 0; i < typecnt; ++i) 1515 typemap[i] = writetype[i] ? thistypecnt++ : -1; 1516 for (i = 0; i < sizeof indmap / sizeof indmap[0]; ++i) 1517 indmap[i] = -1; 1518 thischarcnt = 0; 1519 for (i = 0; i < typecnt; ++i) { 1520 char * thisabbr; 1521 1522 if (!writetype[i]) 1523 continue; 1524 if (indmap[abbrinds[i]] >= 0) 1525 continue; 1526 thisabbr = &chars[abbrinds[i]]; 1527 for (j = 0; j < thischarcnt; ++j) 1528 if (strcmp(&thischars[j], thisabbr) == 0) 1529 break; 1530 if (j == thischarcnt) { 1531 strcpy(&thischars[(int) thischarcnt], 1532 thisabbr); 1533 thischarcnt += strlen(thisabbr) + 1; 1534 } 1535 indmap[abbrinds[i]] = j; 1536 } 1537 #define DO(field) fwrite((void *) tzh.field, \ 1538 (size_t) sizeof tzh.field, (size_t) 1, fp) 1539 tzh = tzh0; 1540 strncpy(tzh.tzh_magic, TZ_MAGIC, sizeof tzh.tzh_magic); 1541 tzh.tzh_version[0] = ZIC_VERSION; 1542 convert(eitol(thistypecnt), tzh.tzh_ttisgmtcnt); 1543 convert(eitol(thistypecnt), tzh.tzh_ttisstdcnt); 1544 convert(eitol(thisleapcnt), tzh.tzh_leapcnt); 1545 convert(eitol(thistimecnt), tzh.tzh_timecnt); 1546 convert(eitol(thistypecnt), tzh.tzh_typecnt); 1547 convert(eitol(thischarcnt), tzh.tzh_charcnt); 1548 DO(tzh_magic); 1549 DO(tzh_version); 1550 DO(tzh_reserved); 1551 DO(tzh_ttisgmtcnt); 1552 DO(tzh_ttisstdcnt); 1553 DO(tzh_leapcnt); 1554 DO(tzh_timecnt); 1555 DO(tzh_typecnt); 1556 DO(tzh_charcnt); 1557 #undef DO 1558 for (i = thistimei; i < thistimelim; ++i) 1559 if (pass == 1) 1560 puttzcode((long) ats[i], fp); 1561 else puttzcode64(ats[i], fp); 1562 for (i = thistimei; i < thistimelim; ++i) { 1563 unsigned char uc; 1564 1565 uc = typemap[types[i]]; 1566 fwrite((void *) &uc, 1567 (size_t) sizeof uc, 1568 (size_t) 1, 1569 fp); 1570 } 1571 for (i = 0; i < typecnt; ++i) 1572 if (writetype[i]) { 1573 puttzcode(gmtoffs[i], fp); 1574 putc(isdsts[i], fp); 1575 putc((unsigned char) indmap[abbrinds[i]], fp); 1576 } 1577 if (thischarcnt != 0) 1578 fwrite((void *) thischars, 1579 (size_t) sizeof thischars[0], 1580 (size_t) thischarcnt, fp); 1581 for (i = thisleapi; i < thisleaplim; ++i) { 1582 register zic_t todo; 1583 1584 if (roll[i]) { 1585 if (timecnt == 0 || trans[i] < ats[0]) { 1586 j = 0; 1587 while (isdsts[j]) 1588 if (++j >= typecnt) { 1589 j = 0; 1590 break; 1591 } 1592 } else { 1593 j = 1; 1594 while (j < timecnt && 1595 trans[i] >= ats[j]) 1596 ++j; 1597 j = types[j - 1]; 1598 } 1599 todo = tadd(trans[i], -gmtoffs[j]); 1600 } else todo = trans[i]; 1601 if (pass == 1) 1602 puttzcode((long) todo, fp); 1603 else puttzcode64(todo, fp); 1604 puttzcode(corr[i], fp); 1605 } 1606 for (i = 0; i < typecnt; ++i) 1607 if (writetype[i]) 1608 putc(ttisstds[i], fp); 1609 for (i = 0; i < typecnt; ++i) 1610 if (writetype[i]) 1611 putc(ttisgmts[i], fp); 1612 } 1613 fprintf(fp, "\n%s\n", string); 1614 if (ferror(fp) || fclose(fp)) 1615 errx(EXIT_FAILURE, _("error writing %s"), fullname); 1616 if (chmod(fullname, mflag) < 0) 1617 err(EXIT_FAILURE, _("cannot change mode of %s to %03o"), 1618 fullname, (unsigned)mflag); 1619 if ((uflag != (uid_t)-1 || gflag != (gid_t)-1) 1620 && chown(fullname, uflag, gflag) < 0) 1621 err(EXIT_FAILURE, _("cannot change ownership of %s"), 1622 fullname); 1623 } 1624 1625 static void 1626 doabbr(char * const abbr, const char * const format, 1627 const char * const letters, const int isdst, const int doquotes) 1628 { 1629 char * cp; 1630 char * slashp; 1631 int len; 1632 1633 slashp = strchr(format, '/'); 1634 if (slashp == NULL) { 1635 if (letters == NULL) 1636 strcpy(abbr, format); 1637 else sprintf(abbr, format, letters); 1638 } else if (isdst) { 1639 strcpy(abbr, slashp + 1); 1640 } else { 1641 if (slashp > format) 1642 strncpy(abbr, format, 1643 (unsigned) (slashp - format)); 1644 abbr[slashp - format] = '\0'; 1645 } 1646 if (!doquotes) 1647 return; 1648 for (cp = abbr; *cp != '\0'; ++cp) 1649 if (strchr("ABCDEFGHIJKLMNOPQRSTUVWXYZ", *cp) == NULL && 1650 strchr("abcdefghijklmnopqrstuvwxyz", *cp) == NULL) 1651 break; 1652 len = strlen(abbr); 1653 if (len > 0 && *cp == '\0') 1654 return; 1655 abbr[len + 2] = '\0'; 1656 abbr[len + 1] = '>'; 1657 for ( ; len > 0; --len) 1658 abbr[len] = abbr[len - 1]; 1659 abbr[0] = '<'; 1660 } 1661 1662 static void 1663 updateminmax(const int x) 1664 { 1665 if (min_year > x) 1666 min_year = x; 1667 if (max_year < x) 1668 max_year = x; 1669 } 1670 1671 static int 1672 stringoffset(char *result, long offset) 1673 { 1674 int hours; 1675 int minutes; 1676 int seconds; 1677 1678 result[0] = '\0'; 1679 if (offset < 0) { 1680 strcpy(result, "-"); 1681 offset = -offset; 1682 } 1683 seconds = offset % SECSPERMIN; 1684 offset /= SECSPERMIN; 1685 minutes = offset % MINSPERHOUR; 1686 offset /= MINSPERHOUR; 1687 hours = offset; 1688 if (hours >= HOURSPERDAY) { 1689 result[0] = '\0'; 1690 return -1; 1691 } 1692 sprintf(end(result), "%d", hours); 1693 if (minutes != 0 || seconds != 0) { 1694 sprintf(end(result), ":%02d", minutes); 1695 if (seconds != 0) 1696 sprintf(end(result), ":%02d", seconds); 1697 } 1698 return 0; 1699 } 1700 1701 static int 1702 stringrule(char *result, const struct rule * const rp, const long dstoff, 1703 const long gmtoff) 1704 { 1705 long tod; 1706 1707 result = end(result); 1708 if (rp->r_dycode == DC_DOM) { 1709 int month, total; 1710 1711 if (rp->r_dayofmonth == 29 && rp->r_month == TM_FEBRUARY) 1712 return -1; 1713 total = 0; 1714 for (month = 0; month < rp->r_month; ++month) 1715 total += len_months[0][month]; 1716 sprintf(result, "J%d", total + rp->r_dayofmonth); 1717 } else { 1718 int week; 1719 1720 if (rp->r_dycode == DC_DOWGEQ) { 1721 week = 1 + rp->r_dayofmonth / DAYSPERWEEK; 1722 if ((week - 1) * DAYSPERWEEK + 1 != rp->r_dayofmonth) 1723 return -1; 1724 } else if (rp->r_dycode == DC_DOWLEQ) { 1725 if (rp->r_dayofmonth == len_months[1][rp->r_month]) 1726 week = 5; 1727 else { 1728 week = 1 + rp->r_dayofmonth / DAYSPERWEEK; 1729 if (week * DAYSPERWEEK - 1 != rp->r_dayofmonth) 1730 return -1; 1731 } 1732 } else return -1; /* "cannot happen" */ 1733 sprintf(result, "M%d.%d.%d", 1734 rp->r_month + 1, week, rp->r_wday); 1735 } 1736 tod = rp->r_tod; 1737 if (rp->r_todisgmt) 1738 tod += gmtoff; 1739 if (rp->r_todisstd && rp->r_stdoff == 0) 1740 tod += dstoff; 1741 if (tod < 0) { 1742 result[0] = '\0'; 1743 return -1; 1744 } 1745 if (tod != 2 * SECSPERMIN * MINSPERHOUR) { 1746 strcat(result, "/"); 1747 if (stringoffset(end(result), tod) != 0) 1748 return -1; 1749 } 1750 return 0; 1751 } 1752 1753 static void 1754 stringzone(char *result, const struct zone * const zpfirst, 1755 const int zonecount) 1756 { 1757 const struct zone * zp; 1758 struct rule * rp; 1759 struct rule * stdrp; 1760 struct rule * dstrp; 1761 int i; 1762 const char * abbrvar; 1763 1764 result[0] = '\0'; 1765 zp = zpfirst + zonecount - 1; 1766 stdrp = dstrp = NULL; 1767 for (i = 0; i < zp->z_nrules; ++i) { 1768 rp = &zp->z_rules[i]; 1769 if (rp->r_hiwasnum || rp->r_hiyear != INT_MAX) 1770 continue; 1771 if (rp->r_yrtype != NULL) 1772 continue; 1773 if (rp->r_stdoff == 0) { 1774 if (stdrp == NULL) 1775 stdrp = rp; 1776 else return; 1777 } else { 1778 if (dstrp == NULL) 1779 dstrp = rp; 1780 else return; 1781 } 1782 } 1783 if (stdrp == NULL && dstrp == NULL) { 1784 /* 1785 ** There are no rules running through "max". 1786 ** Let's find the latest rule. 1787 */ 1788 for (i = 0; i < zp->z_nrules; ++i) { 1789 rp = &zp->z_rules[i]; 1790 if (stdrp == NULL || rp->r_hiyear > stdrp->r_hiyear || 1791 (rp->r_hiyear == stdrp->r_hiyear && 1792 rp->r_month > stdrp->r_month)) 1793 stdrp = rp; 1794 } 1795 if (stdrp != NULL && stdrp->r_stdoff != 0) 1796 return; /* We end up in DST (a POSIX no-no). */ 1797 /* 1798 ** Horrid special case: if year is 2037, 1799 ** presume this is a zone handled on a year-by-year basis; 1800 ** do not try to apply a rule to the zone. 1801 */ 1802 if (stdrp != NULL && stdrp->r_hiyear == 2037) 1803 return; 1804 } 1805 if (stdrp == NULL && zp->z_nrules != 0) 1806 return; 1807 abbrvar = (stdrp == NULL) ? "" : stdrp->r_abbrvar; 1808 doabbr(result, zp->z_format, abbrvar, FALSE, TRUE); 1809 if (stringoffset(end(result), -zp->z_gmtoff) != 0) { 1810 result[0] = '\0'; 1811 return; 1812 } 1813 if (dstrp == NULL) 1814 return; 1815 doabbr(end(result), zp->z_format, dstrp->r_abbrvar, TRUE, TRUE); 1816 if (dstrp->r_stdoff != SECSPERMIN * MINSPERHOUR) 1817 if (stringoffset(end(result), 1818 -(zp->z_gmtoff + dstrp->r_stdoff)) != 0) { 1819 result[0] = '\0'; 1820 return; 1821 } 1822 strcat(result, ","); 1823 if (stringrule(result, dstrp, dstrp->r_stdoff, zp->z_gmtoff) != 0) { 1824 result[0] = '\0'; 1825 return; 1826 } 1827 strcat(result, ","); 1828 if (stringrule(result, stdrp, dstrp->r_stdoff, zp->z_gmtoff) != 0) { 1829 result[0] = '\0'; 1830 return; 1831 } 1832 } 1833 1834 static void 1835 outzone(const struct zone * const zpfirst, const int zonecount) 1836 { 1837 const struct zone *zp; 1838 struct rule *rp; 1839 int i, j; 1840 int usestart, useuntil; 1841 zic_t starttime, untiltime; 1842 long gmtoff; 1843 long stdoff; 1844 int year; 1845 long startoff; 1846 int startttisstd; 1847 int startttisgmt; 1848 int type; 1849 char *startbuf; 1850 char *ab; 1851 char *envvar; 1852 int max_abbr_len; 1853 int max_envvar_len; 1854 1855 max_abbr_len = 2 + max_format_len + max_abbrvar_len; 1856 max_envvar_len = 2 * max_abbr_len + 5 * 9; 1857 startbuf = emalloc(max_abbr_len + 1); 1858 ab = emalloc(max_abbr_len + 1); 1859 envvar = emalloc(max_envvar_len + 1); 1860 INITIALIZE(untiltime); 1861 INITIALIZE(starttime); 1862 /* 1863 ** Now. . .finally. . .generate some useful data! 1864 */ 1865 timecnt = 0; 1866 typecnt = 0; 1867 charcnt = 0; 1868 /* 1869 ** Thanks to Earl Chew 1870 ** for noting the need to unconditionally initialize startttisstd. 1871 */ 1872 startttisstd = FALSE; 1873 startttisgmt = FALSE; 1874 min_year = max_year = EPOCH_YEAR; 1875 if (leapseen) { 1876 updateminmax(leapminyear); 1877 updateminmax(leapmaxyear + (leapmaxyear < INT_MAX)); 1878 } 1879 for (i = 0; i < zonecount; ++i) { 1880 zp = &zpfirst[i]; 1881 if (i < zonecount - 1) 1882 updateminmax(zp->z_untilrule.r_loyear); 1883 for (j = 0; j < zp->z_nrules; ++j) { 1884 rp = &zp->z_rules[j]; 1885 if (rp->r_lowasnum) 1886 updateminmax(rp->r_loyear); 1887 if (rp->r_hiwasnum) 1888 updateminmax(rp->r_hiyear); 1889 } 1890 } 1891 /* 1892 ** Generate lots of data if a rule can't cover all future times. 1893 */ 1894 stringzone(envvar, zpfirst, zonecount); 1895 if (noise && envvar[0] == '\0') { 1896 char * wp; 1897 1898 wp = ecpyalloc(_("no POSIX environment variable for zone")); 1899 wp = ecatalloc(wp, " "); 1900 wp = ecatalloc(wp, zpfirst->z_name); 1901 warning(wp); 1902 ifree(wp); 1903 } 1904 if (envvar[0] == '\0') { 1905 if (min_year >= INT_MIN + YEARSPERREPEAT) 1906 min_year -= YEARSPERREPEAT; 1907 else min_year = INT_MIN; 1908 if (max_year <= INT_MAX - YEARSPERREPEAT) 1909 max_year += YEARSPERREPEAT; 1910 else max_year = INT_MAX; 1911 } 1912 /* 1913 ** For the benefit of older systems, 1914 ** generate data from 1900 through 2037. 1915 */ 1916 if (min_year > 1900) 1917 min_year = 1900; 1918 if (max_year < 2037) 1919 max_year = 2037; 1920 for (i = 0; i < zonecount; ++i) { 1921 /* 1922 ** A guess that may well be corrected later. 1923 */ 1924 stdoff = 0; 1925 zp = &zpfirst[i]; 1926 usestart = i > 0 && (zp - 1)->z_untiltime > min_time; 1927 useuntil = i < (zonecount - 1); 1928 if (useuntil && zp->z_untiltime <= min_time) 1929 continue; 1930 gmtoff = zp->z_gmtoff; 1931 eat(zp->z_filename, zp->z_linenum); 1932 *startbuf = '\0'; 1933 startoff = zp->z_gmtoff; 1934 if (zp->z_nrules == 0) { 1935 stdoff = zp->z_stdoff; 1936 doabbr(startbuf, zp->z_format, 1937 NULL, stdoff != 0, FALSE); 1938 type = addtype(oadd(zp->z_gmtoff, stdoff), 1939 startbuf, stdoff != 0, startttisstd, 1940 startttisgmt); 1941 if (usestart) { 1942 addtt(starttime, type); 1943 usestart = FALSE; 1944 } else if (stdoff != 0) 1945 addtt(min_time, type); 1946 } else for (year = min_year; year <= max_year; ++year) { 1947 if (useuntil && year > zp->z_untilrule.r_hiyear) 1948 break; 1949 /* 1950 ** Mark which rules to do in the current year. 1951 ** For those to do, calculate rpytime(rp, year); 1952 */ 1953 for (j = 0; j < zp->z_nrules; ++j) { 1954 rp = &zp->z_rules[j]; 1955 eats(zp->z_filename, zp->z_linenum, 1956 rp->r_filename, rp->r_linenum); 1957 rp->r_todo = year >= rp->r_loyear && 1958 year <= rp->r_hiyear && 1959 yearistype(year, rp->r_yrtype); 1960 if (rp->r_todo) 1961 rp->r_temp = rpytime(rp, year); 1962 } 1963 for ( ; ; ) { 1964 int k; 1965 zic_t jtime, ktime; 1966 long offset; 1967 1968 INITIALIZE(ktime); 1969 if (useuntil) { 1970 /* 1971 ** Turn untiltime into UTC 1972 ** assuming the current gmtoff and 1973 ** stdoff values. 1974 */ 1975 untiltime = zp->z_untiltime; 1976 if (!zp->z_untilrule.r_todisgmt) 1977 untiltime = tadd(untiltime, 1978 -gmtoff); 1979 if (!zp->z_untilrule.r_todisstd) 1980 untiltime = tadd(untiltime, 1981 -stdoff); 1982 } 1983 /* 1984 ** Find the rule (of those to do, if any) 1985 ** that takes effect earliest in the year. 1986 */ 1987 k = -1; 1988 for (j = 0; j < zp->z_nrules; ++j) { 1989 rp = &zp->z_rules[j]; 1990 if (!rp->r_todo) 1991 continue; 1992 eats(zp->z_filename, zp->z_linenum, 1993 rp->r_filename, rp->r_linenum); 1994 offset = rp->r_todisgmt ? 0 : gmtoff; 1995 if (!rp->r_todisstd) 1996 offset = oadd(offset, stdoff); 1997 jtime = rp->r_temp; 1998 if (jtime == min_time || 1999 jtime == max_time) 2000 continue; 2001 jtime = tadd(jtime, -offset); 2002 if (k < 0 || jtime < ktime) { 2003 k = j; 2004 ktime = jtime; 2005 } 2006 } 2007 if (k < 0) 2008 break; /* go on to next year */ 2009 rp = &zp->z_rules[k]; 2010 rp->r_todo = FALSE; 2011 if (useuntil && ktime >= untiltime) 2012 break; 2013 stdoff = rp->r_stdoff; 2014 if (usestart && ktime == starttime) 2015 usestart = FALSE; 2016 if (usestart) { 2017 if (ktime < starttime) { 2018 startoff = oadd(zp->z_gmtoff, 2019 stdoff); 2020 doabbr(startbuf, zp->z_format, 2021 rp->r_abbrvar, 2022 rp->r_stdoff != 0, 2023 FALSE); 2024 continue; 2025 } 2026 if (*startbuf == '\0' && 2027 startoff == oadd(zp->z_gmtoff, 2028 stdoff)) { 2029 doabbr(startbuf, 2030 zp->z_format, 2031 rp->r_abbrvar, 2032 rp->r_stdoff != 2033 0, 2034 FALSE); 2035 } 2036 } 2037 eats(zp->z_filename, zp->z_linenum, 2038 rp->r_filename, rp->r_linenum); 2039 doabbr(ab, zp->z_format, rp->r_abbrvar, 2040 rp->r_stdoff != 0, FALSE); 2041 offset = oadd(zp->z_gmtoff, rp->r_stdoff); 2042 type = addtype(offset, ab, rp->r_stdoff != 0, 2043 rp->r_todisstd, rp->r_todisgmt); 2044 addtt(ktime, type); 2045 } 2046 } 2047 if (usestart) { 2048 if (*startbuf == '\0' && 2049 zp->z_format != NULL && 2050 strchr(zp->z_format, '%') == NULL && 2051 strchr(zp->z_format, '/') == NULL) 2052 strcpy(startbuf, zp->z_format); 2053 eat(zp->z_filename, zp->z_linenum); 2054 if (*startbuf == '\0') 2055 error(_("can't determine time zone abbreviation to use just after until time")); 2056 else addtt(starttime, 2057 addtype(startoff, startbuf, 2058 startoff != zp->z_gmtoff, 2059 startttisstd, 2060 startttisgmt)); 2061 } 2062 /* 2063 ** Now we may get to set starttime for the next zone line. 2064 */ 2065 if (useuntil) { 2066 startttisstd = zp->z_untilrule.r_todisstd; 2067 startttisgmt = zp->z_untilrule.r_todisgmt; 2068 starttime = zp->z_untiltime; 2069 if (!startttisstd) 2070 starttime = tadd(starttime, -stdoff); 2071 if (!startttisgmt) 2072 starttime = tadd(starttime, -gmtoff); 2073 } 2074 } 2075 writezone(zpfirst->z_name, envvar); 2076 ifree(startbuf); 2077 ifree(ab); 2078 ifree(envvar); 2079 } 2080 2081 static void 2082 addtt(const zic_t starttime, int type) 2083 { 2084 if (starttime <= min_time || 2085 (timecnt == 1 && attypes[0].at < min_time)) { 2086 gmtoffs[0] = gmtoffs[type]; 2087 isdsts[0] = isdsts[type]; 2088 ttisstds[0] = ttisstds[type]; 2089 ttisgmts[0] = ttisgmts[type]; 2090 if (abbrinds[type] != 0) 2091 strcpy(chars, &chars[abbrinds[type]]); 2092 abbrinds[0] = 0; 2093 charcnt = strlen(chars) + 1; 2094 typecnt = 1; 2095 timecnt = 0; 2096 type = 0; 2097 } 2098 if (timecnt >= TZ_MAX_TIMES) { 2099 error(_("too many transitions?!")); 2100 exit(EXIT_FAILURE); 2101 } 2102 attypes[timecnt].at = starttime; 2103 attypes[timecnt].type = type; 2104 ++timecnt; 2105 } 2106 2107 static int 2108 addtype(const long gmtoff, const char * const abbr, const int isdst, 2109 const int ttisstd, const int ttisgmt) 2110 { 2111 int i, j; 2112 2113 if (isdst != TRUE && isdst != FALSE) { 2114 error(_("internal error - addtype called with bad isdst")); 2115 exit(EXIT_FAILURE); 2116 } 2117 if (ttisstd != TRUE && ttisstd != FALSE) { 2118 error(_("internal error - addtype called with bad ttisstd")); 2119 exit(EXIT_FAILURE); 2120 } 2121 if (ttisgmt != TRUE && ttisgmt != FALSE) { 2122 error(_("internal error - addtype called with bad ttisgmt")); 2123 exit(EXIT_FAILURE); 2124 } 2125 /* 2126 ** See if there's already an entry for this zone type. 2127 ** If so, just return its index. 2128 */ 2129 for (i = 0; i < typecnt; ++i) { 2130 if (gmtoff == gmtoffs[i] && isdst == isdsts[i] && 2131 strcmp(abbr, &chars[abbrinds[i]]) == 0 && 2132 ttisstd == ttisstds[i] && 2133 ttisgmt == ttisgmts[i]) 2134 return i; 2135 } 2136 /* 2137 ** There isn't one; add a new one, unless there are already too 2138 ** many. 2139 */ 2140 if (typecnt >= TZ_MAX_TYPES) { 2141 error(_("too many local time types")); 2142 exit(EXIT_FAILURE); 2143 } 2144 if (! (-1L - 2147483647L <= gmtoff && gmtoff <= 2147483647L)) { 2145 error(_("UTC offset out of range")); 2146 exit(EXIT_FAILURE); 2147 } 2148 gmtoffs[i] = gmtoff; 2149 isdsts[i] = isdst; 2150 ttisstds[i] = ttisstd; 2151 ttisgmts[i] = ttisgmt; 2152 2153 for (j = 0; j < charcnt; ++j) 2154 if (strcmp(&chars[j], abbr) == 0) 2155 break; 2156 if (j == charcnt) 2157 newabbr(abbr); 2158 abbrinds[i] = j; 2159 ++typecnt; 2160 return i; 2161 } 2162 2163 static void 2164 leapadd(const zic_t t, const int positive, const int rolling, int count) 2165 { 2166 int i, j; 2167 2168 if (leapcnt + (positive ? count : 1) > TZ_MAX_LEAPS) { 2169 error(_("too many leap seconds")); 2170 exit(EXIT_FAILURE); 2171 } 2172 for (i = 0; i < leapcnt; ++i) 2173 if (t <= trans[i]) { 2174 if (t == trans[i]) { 2175 error(_("repeated leap second moment")); 2176 exit(EXIT_FAILURE); 2177 } 2178 break; 2179 } 2180 do { 2181 for (j = leapcnt; j > i; --j) { 2182 trans[j] = trans[j - 1]; 2183 corr[j] = corr[j - 1]; 2184 roll[j] = roll[j - 1]; 2185 } 2186 trans[i] = t; 2187 corr[i] = positive ? 1L : eitol(-count); 2188 roll[i] = rolling; 2189 ++leapcnt; 2190 } while (positive && --count != 0); 2191 } 2192 2193 static void 2194 adjleap(void) 2195 { 2196 int i; 2197 long last = 0; 2198 2199 /* 2200 ** propagate leap seconds forward 2201 */ 2202 for (i = 0; i < leapcnt; ++i) { 2203 trans[i] = tadd(trans[i], last); 2204 last = corr[i] += last; 2205 } 2206 } 2207 2208 static int 2209 yearistype(const int year, const char * const type) 2210 { 2211 static char * buf; 2212 int result; 2213 2214 if (type == NULL || *type == '\0') 2215 return TRUE; 2216 buf = erealloc(buf, (int) (132 + strlen(yitcommand) + strlen(type))); 2217 sprintf(buf, "%s %d %s", yitcommand, year, type); 2218 result = system(buf); 2219 if (WIFEXITED(result)) switch (WEXITSTATUS(result)) { 2220 case 0: 2221 return TRUE; 2222 case 1: 2223 return FALSE; 2224 } 2225 error(_("Wild result from command execution")); 2226 warnx(_("command was '%s', result was %d"), buf, result); 2227 for ( ; ; ) 2228 exit(EXIT_FAILURE); 2229 } 2230 2231 static int 2232 lowerit(int a) 2233 { 2234 a = (unsigned char) a; 2235 return (isascii(a) && isupper(a)) ? tolower(a) : a; 2236 } 2237 2238 static int 2239 ciequal(const char *ap, const char *bp) /* case-insensitive equality */ 2240 { 2241 while (lowerit(*ap) == lowerit(*bp++)) 2242 if (*ap++ == '\0') 2243 return TRUE; 2244 return FALSE; 2245 } 2246 2247 static int 2248 itsabbr(const char *abbr, const char *word) 2249 { 2250 if (lowerit(*abbr) != lowerit(*word)) 2251 return FALSE; 2252 ++word; 2253 while (*++abbr != '\0') 2254 do { 2255 if (*word == '\0') 2256 return FALSE; 2257 } while (lowerit(*word++) != lowerit(*abbr)); 2258 return TRUE; 2259 } 2260 2261 static const struct lookup * 2262 byword(const char * const word, const struct lookup * const table) 2263 { 2264 const struct lookup *foundlp; 2265 const struct lookup *lp; 2266 2267 if (word == NULL || table == NULL) 2268 return NULL; 2269 /* 2270 ** Look for exact match. 2271 */ 2272 for (lp = table; lp->l_word != NULL; ++lp) 2273 if (ciequal(word, lp->l_word)) 2274 return lp; 2275 /* 2276 ** Look for inexact match. 2277 */ 2278 foundlp = NULL; 2279 for (lp = table; lp->l_word != NULL; ++lp) 2280 if (itsabbr(word, lp->l_word)) { 2281 if (foundlp == NULL) 2282 foundlp = lp; 2283 else return NULL; /* multiple inexact matches */ 2284 } 2285 return foundlp; 2286 } 2287 2288 static char ** 2289 getfields(char *cp) 2290 { 2291 char *dp; 2292 char **array; 2293 int nsubs; 2294 2295 if (cp == NULL) 2296 return NULL; 2297 array = (char **) (void *) 2298 emalloc((int) ((strlen(cp) + 1) * sizeof *array)); 2299 nsubs = 0; 2300 for ( ; ; ) { 2301 while (isascii((unsigned char) *cp) && 2302 isspace((unsigned char) *cp)) 2303 ++cp; 2304 if (*cp == '\0' || *cp == '#') 2305 break; 2306 array[nsubs++] = dp = cp; 2307 do { 2308 if ((*dp = *cp++) != '"') 2309 ++dp; 2310 else while ((*dp = *cp++) != '"') 2311 if (*dp != '\0') 2312 ++dp; 2313 else { 2314 error(_( 2315 "Odd number of quotation marks" 2316 )); 2317 exit(1); 2318 } 2319 } while (*cp != '\0' && *cp != '#' && 2320 (!isascii(*cp) || !isspace((unsigned char) *cp))); 2321 if (isascii(*cp) && isspace((unsigned char) *cp)) 2322 ++cp; 2323 *dp = '\0'; 2324 } 2325 array[nsubs] = NULL; 2326 return array; 2327 } 2328 2329 static long 2330 oadd(const long t1, const long t2) 2331 { 2332 long t; 2333 2334 t = t1 + t2; 2335 if ((t2 > 0 && t <= t1) || (t2 < 0 && t >= t1)) { 2336 error(_("time overflow")); 2337 exit(EXIT_FAILURE); 2338 } 2339 return t; 2340 } 2341 2342 static zic_t 2343 tadd(const zic_t t1, const long t2) 2344 { 2345 zic_t t; 2346 2347 if (t1 == max_time && t2 > 0) 2348 return max_time; 2349 if (t1 == min_time && t2 < 0) 2350 return min_time; 2351 t = t1 + t2; 2352 if ((t2 > 0 && t <= t1) || (t2 < 0 && t >= t1)) { 2353 error(_("time overflow")); 2354 exit(EXIT_FAILURE); 2355 } 2356 return t; 2357 } 2358 2359 /* 2360 ** Given a rule, and a year, compute the date - in seconds since January 1, 2361 ** 1970, 00:00 LOCAL time - in that year that the rule refers to. 2362 */ 2363 2364 static zic_t 2365 rpytime(const struct rule * const rp, const int wantedy) 2366 { 2367 int y, m, i; 2368 long dayoff; /* with a nod to Margaret O. */ 2369 zic_t t; 2370 2371 if (wantedy == INT_MIN) 2372 return min_time; 2373 if (wantedy == INT_MAX) 2374 return max_time; 2375 dayoff = 0; 2376 m = TM_JANUARY; 2377 y = EPOCH_YEAR; 2378 while (wantedy != y) { 2379 if (wantedy > y) { 2380 i = len_years[isleap(y)]; 2381 ++y; 2382 } else { 2383 --y; 2384 i = -len_years[isleap(y)]; 2385 } 2386 dayoff = oadd(dayoff, eitol(i)); 2387 } 2388 while (m != rp->r_month) { 2389 i = len_months[isleap(y)][m]; 2390 dayoff = oadd(dayoff, eitol(i)); 2391 ++m; 2392 } 2393 i = rp->r_dayofmonth; 2394 if (m == TM_FEBRUARY && i == 29 && !isleap(y)) { 2395 if (rp->r_dycode == DC_DOWLEQ) 2396 --i; 2397 else { 2398 error(_("use of 2/29 in non leap-year")); 2399 exit(EXIT_FAILURE); 2400 } 2401 } 2402 --i; 2403 dayoff = oadd(dayoff, eitol(i)); 2404 if (rp->r_dycode == DC_DOWGEQ || rp->r_dycode == DC_DOWLEQ) { 2405 long wday; 2406 2407 #define LDAYSPERWEEK ((long) DAYSPERWEEK) 2408 wday = eitol(EPOCH_WDAY); 2409 /* 2410 ** Don't trust mod of negative numbers. 2411 */ 2412 if (dayoff >= 0) 2413 wday = (wday + dayoff) % LDAYSPERWEEK; 2414 else { 2415 wday -= ((-dayoff) % LDAYSPERWEEK); 2416 if (wday < 0) 2417 wday += LDAYSPERWEEK; 2418 } 2419 while (wday != eitol(rp->r_wday)) 2420 if (rp->r_dycode == DC_DOWGEQ) { 2421 dayoff = oadd(dayoff, (long) 1); 2422 if (++wday >= LDAYSPERWEEK) 2423 wday = 0; 2424 ++i; 2425 } else { 2426 dayoff = oadd(dayoff, (long) -1); 2427 if (--wday < 0) 2428 wday = LDAYSPERWEEK - 1; 2429 --i; 2430 } 2431 if (i < 0 || i >= len_months[isleap(y)][m]) { 2432 if (noise) 2433 warning(_("rule goes past start/end of month--\ 2434 will not work with pre-2004 versions of zic")); 2435 } 2436 } 2437 if (dayoff < min_time / SECSPERDAY) 2438 return min_time; 2439 if (dayoff > max_time / SECSPERDAY) 2440 return max_time; 2441 t = (zic_t) dayoff * SECSPERDAY; 2442 return tadd(t, rp->r_tod); 2443 } 2444 2445 static void 2446 newabbr(const char * const string) 2447 { 2448 int i; 2449 2450 if (strcmp(string, GRANDPARENTED) != 0) { 2451 const char * cp; 2452 char * wp; 2453 2454 /* 2455 ** Want one to ZIC_MAX_ABBR_LEN_WO_WARN alphabetics 2456 ** optionally followed by a + or - and a number from 1 to 14. 2457 */ 2458 cp = string; 2459 wp = NULL; 2460 while (isascii((unsigned char) *cp) && 2461 isalpha((unsigned char) *cp)) 2462 ++cp; 2463 if (cp - string == 0) 2464 wp = _("time zone abbreviation lacks alphabetic at start"); 2465 if (noise && cp - string > 3) 2466 wp = _("time zone abbreviation has more than 3 alphabetics"); 2467 if (cp - string > ZIC_MAX_ABBR_LEN_WO_WARN) 2468 wp = _("time zone abbreviation has too many alphabetics"); 2469 if (wp == NULL && (*cp == '+' || *cp == '-')) { 2470 ++cp; 2471 if (isascii((unsigned char) *cp) && 2472 isdigit((unsigned char) *cp)) 2473 if (*cp++ == '1' && 2474 *cp >= '0' && *cp <= '4') 2475 ++cp; 2476 } 2477 if (*cp != '\0') 2478 wp = _("time zone abbreviation differs from POSIX standard"); 2479 if (wp != NULL) { 2480 wp = ecpyalloc(wp); 2481 wp = ecatalloc(wp, " ("); 2482 wp = ecatalloc(wp, string); 2483 wp = ecatalloc(wp, ")"); 2484 warning(wp); 2485 ifree(wp); 2486 } 2487 } 2488 i = strlen(string) + 1; 2489 if (charcnt + i > TZ_MAX_CHARS) { 2490 error(_("too many, or too long, time zone abbreviations")); 2491 exit(EXIT_FAILURE); 2492 } 2493 strcpy(&chars[charcnt], string); 2494 charcnt += eitol(i); 2495 } 2496 2497 static int 2498 mkdirs(char *argname) 2499 { 2500 char *name; 2501 char *cp; 2502 2503 if (argname == NULL || *argname == '\0' || Dflag) 2504 return 0; 2505 cp = name = ecpyalloc(argname); 2506 while ((cp = strchr(cp + 1, '/')) != 0) { 2507 *cp = '\0'; 2508 #ifndef unix 2509 /* 2510 ** DOS drive specifier? 2511 */ 2512 if (isalpha((unsigned char) name[0]) && 2513 name[1] == ':' && name[2] == '\0') { 2514 *cp = '/'; 2515 continue; 2516 } 2517 #endif /* !defined unix */ 2518 if (!itsdir(name)) { 2519 /* 2520 ** It doesn't seem to exist, so we try to create it. 2521 ** Creation may fail because of the directory being 2522 ** created by some other multiprocessor, so we get 2523 ** to do extra checking. 2524 */ 2525 if ((mkdir(name, MKDIR_UMASK) != 0) && 2526 (errno != EEXIST || !itsdir(name))) { 2527 warn(_("can't create directory %s"), name); 2528 ifree(name); 2529 return -1; 2530 } 2531 } 2532 *cp = '/'; 2533 } 2534 ifree(name); 2535 return 0; 2536 } 2537 2538 static long 2539 eitol(const int i) 2540 { 2541 long l; 2542 2543 l = i; 2544 if ((i < 0 && l >= 0) || (i == 0 && l != 0) || (i > 0 && l <= 0)) 2545 errx(EXIT_FAILURE, _("%d did not sign extend correctly"), i); 2546 return l; 2547 } 2548 2549 #include <grp.h> 2550 #include <pwd.h> 2551 2552 static void 2553 setgroup(gid_t *flag, const char *name) 2554 { 2555 struct group *gr; 2556 2557 if (*flag != (gid_t)-1) 2558 errx(EXIT_FAILURE, _("multiple -g flags specified")); 2559 2560 gr = getgrnam(name); 2561 if (gr == 0) { 2562 char *ep; 2563 unsigned long ul; 2564 2565 ul = strtoul(name, &ep, 10); 2566 if (ul == (unsigned long)(gid_t)ul && *ep == '\0') { 2567 *flag = ul; 2568 return; 2569 } 2570 errx(EXIT_FAILURE, _("group `%s' not found"), name); 2571 } 2572 *flag = gr->gr_gid; 2573 } 2574 2575 static void 2576 setuser(uid_t *flag, const char *name) 2577 { 2578 struct passwd *pw; 2579 2580 if (*flag != (gid_t)-1) 2581 errx(EXIT_FAILURE, _("multiple -u flags specified")); 2582 2583 pw = getpwnam(name); 2584 if (pw == 0) { 2585 char *ep; 2586 unsigned long ul; 2587 2588 ul = strtoul(name, &ep, 10); 2589 if (ul == (unsigned long)(gid_t)ul && *ep == '\0') { 2590 *flag = ul; 2591 return; 2592 } 2593 errx(EXIT_FAILURE, _("user `%s' not found"), name); 2594 } 2595 *flag = pw->pw_uid; 2596 } 2597 2598 /* 2599 ** UNIX was a registered trademark of The Open Group in 2003. 2600 */ 2601