1 #ifndef lint 2 #ifndef NOID 3 static char elsieid[] = "@(#)zic.c 7.96"; 4 #endif /* !defined NOID */ 5 #endif /* !defined lint */ 6 7 /* 8 * @(#)zic.c 7.96 9 * $FreeBSD: src/usr.sbin/zic/zic.c,v 1.11 1999/08/28 01:21:20 peter Exp $ 10 * $DragonFly: src/usr.sbin/zic/zic.c,v 1.6 2004/12/18 22:48:15 swildner Exp $ 11 */ 12 #include "private.h" 13 #include "tzfile.h" 14 #include <err.h> 15 #include <locale.h> 16 #include <sys/stat.h> /* for umask manifest constants */ 17 #include <sys/types.h> 18 #include <unistd.h> 19 20 /* 21 ** On some ancient hosts, predicates like `isspace(C)' are defined 22 ** only if isascii(C) || C == EOF. Modern hosts obey the C Standard, 23 ** which says they are defined only if C == ((unsigned char) C) || C == EOF. 24 ** Neither the C Standard nor Posix require that `isascii' exist. 25 ** For portability, we check both ancient and modern requirements. 26 ** If isascii is not defined, the isascii check succeeds trivially. 27 */ 28 #include "ctype.h" 29 #ifndef isascii 30 #define isascii(x) 1 31 #endif 32 33 struct rule { 34 const char * r_filename; 35 int r_linenum; 36 const char * r_name; 37 38 int r_loyear; /* for example, 1986 */ 39 int r_hiyear; /* for example, 1986 */ 40 const char * r_yrtype; 41 42 int r_month; /* 0..11 */ 43 44 int r_dycode; /* see below */ 45 int r_dayofmonth; 46 int r_wday; 47 48 long r_tod; /* time from midnight */ 49 int r_todisstd; /* above is standard time if TRUE */ 50 /* or wall clock time if FALSE */ 51 int r_todisgmt; /* above is GMT if TRUE */ 52 /* or local time if FALSE */ 53 long r_stdoff; /* offset from standard time */ 54 const char * r_abbrvar; /* variable part of abbreviation */ 55 56 int r_todo; /* a rule to do (used in outzone) */ 57 time_t r_temp; /* used in outzone */ 58 }; 59 60 /* 61 ** r_dycode r_dayofmonth r_wday 62 */ 63 64 #define DC_DOM 0 /* 1..31 */ /* unused */ 65 #define DC_DOWGEQ 1 /* 1..31 */ /* 0..6 (Sun..Sat) */ 66 #define DC_DOWLEQ 2 /* 1..31 */ /* 0..6 (Sun..Sat) */ 67 68 struct zone { 69 const char * z_filename; 70 int z_linenum; 71 72 const char * z_name; 73 long z_gmtoff; 74 const char * z_rule; 75 const char * z_format; 76 77 long z_stdoff; 78 79 struct rule * z_rules; 80 int z_nrules; 81 82 struct rule z_untilrule; 83 time_t z_untiltime; 84 }; 85 86 static void addtt(time_t starttime, int type); 87 static int addtype(long gmtoff, const char *abbr, int isdst, 88 int ttisstd, int ttisgmt); 89 static void leapadd(time_t t, int positive, int rolling, int count); 90 static void adjleap(void); 91 static void associate(void); 92 static int ciequal(const char *ap, const char *bp); 93 static void convert(long val, char *buf); 94 static void dolink(const char *fromfile, const char *tofile); 95 static void doabbr(char *abbr, const char *format, 96 const char *letters, int isdst); 97 static void eat(const char *name, int num); 98 static void eats(const char *name, int num, 99 const char *rname, int rnum); 100 static long eitol(int i); 101 static void error(const char *message); 102 static char ** getfields(char *buf); 103 static long gethms(const char *string, const char *errstrng, 104 int signable); 105 static void infile(const char *filename); 106 static void inleap(char **fields, int nfields); 107 static void inlink(char **fields, int nfields); 108 static void inrule(char **fields, int nfields); 109 static int inzcont(char **fields, int nfields); 110 static int inzone(char **fields, int nfields); 111 static int inzsub(char **fields, int nfields, int iscont); 112 static int itsabbr(const char *abbr, const char *word); 113 static int itsdir(const char *name); 114 static int lowerit(int c); 115 static char * memcheck(char *tocheck); 116 static int mkdirs(char *filename); 117 static void newabbr(const char *abbr); 118 static long oadd(long t1, long t2); 119 static void outzone(const struct zone *zp, int ntzones); 120 static void puttzcode(long code, FILE *fp); 121 static int rcomp(const void *leftp, const void *rightp); 122 static time_t rpytime(const struct rule *rp, int wantedy); 123 static void rulesub(struct rule *rp, 124 const char *loyearp, const char *hiyearp, 125 const char *typep, const char *monthp, 126 const char *dayp, const char *timep); 127 static void setboundaries(void); 128 static void setgroup(gid_t *flag, const char *name); 129 static void setuser(uid_t *flag, const char *name); 130 static time_t tadd(time_t t1, long t2); 131 static void usage(void); 132 static void writezone(const char *name); 133 static int yearistype(int year, const char *type); 134 135 #if !(HAVE_STRERROR - 0) 136 static char * strerror(int); 137 #endif /* !(HAVE_STRERROR - 0) */ 138 139 static int charcnt; 140 static int errors; 141 static const char * filename; 142 static int leapcnt; 143 static int linenum; 144 static time_t max_time; 145 static int max_year; 146 static int max_year_representable; 147 static time_t min_time; 148 static int min_year; 149 static int min_year_representable; 150 static int noise; 151 static const char * rfilename; 152 static int rlinenum; 153 static int timecnt; 154 static int typecnt; 155 156 /* 157 ** Line codes. 158 */ 159 160 #define LC_RULE 0 161 #define LC_ZONE 1 162 #define LC_LINK 2 163 #define LC_LEAP 3 164 165 /* 166 ** Which fields are which on a Zone line. 167 */ 168 169 #define ZF_NAME 1 170 #define ZF_GMTOFF 2 171 #define ZF_RULE 3 172 #define ZF_FORMAT 4 173 #define ZF_TILYEAR 5 174 #define ZF_TILMONTH 6 175 #define ZF_TILDAY 7 176 #define ZF_TILTIME 8 177 #define ZONE_MINFIELDS 5 178 #define ZONE_MAXFIELDS 9 179 180 /* 181 ** Which fields are which on a Zone continuation line. 182 */ 183 184 #define ZFC_GMTOFF 0 185 #define ZFC_RULE 1 186 #define ZFC_FORMAT 2 187 #define ZFC_TILYEAR 3 188 #define ZFC_TILMONTH 4 189 #define ZFC_TILDAY 5 190 #define ZFC_TILTIME 6 191 #define ZONEC_MINFIELDS 3 192 #define ZONEC_MAXFIELDS 7 193 194 /* 195 ** Which files are which on a Rule line. 196 */ 197 198 #define RF_NAME 1 199 #define RF_LOYEAR 2 200 #define RF_HIYEAR 3 201 #define RF_COMMAND 4 202 #define RF_MONTH 5 203 #define RF_DAY 6 204 #define RF_TOD 7 205 #define RF_STDOFF 8 206 #define RF_ABBRVAR 9 207 #define RULE_FIELDS 10 208 209 /* 210 ** Which fields are which on a Link line. 211 */ 212 213 #define LF_FROM 1 214 #define LF_TO 2 215 #define LINK_FIELDS 3 216 217 /* 218 ** Which fields are which on a Leap line. 219 */ 220 221 #define LP_YEAR 1 222 #define LP_MONTH 2 223 #define LP_DAY 3 224 #define LP_TIME 4 225 #define LP_CORR 5 226 #define LP_ROLL 6 227 #define LEAP_FIELDS 7 228 229 /* 230 ** Year synonyms. 231 */ 232 233 #define YR_MINIMUM 0 234 #define YR_MAXIMUM 1 235 #define YR_ONLY 2 236 237 static struct rule * rules; 238 static int nrules; /* number of rules */ 239 240 static struct zone * zones; 241 static int nzones; /* number of zones */ 242 243 struct link { 244 const char * l_filename; 245 int l_linenum; 246 const char * l_from; 247 const char * l_to; 248 }; 249 250 static struct link * links; 251 static int nlinks; 252 253 struct lookup { 254 const char * l_word; 255 const int l_value; 256 }; 257 258 static struct lookup const *byword(const char *string, 259 const struct lookup *lp); 260 261 static struct lookup const line_codes[] = { 262 { "Rule", LC_RULE }, 263 { "Zone", LC_ZONE }, 264 { "Link", LC_LINK }, 265 { "Leap", LC_LEAP }, 266 { NULL, 0} 267 }; 268 269 static struct lookup const mon_names[] = { 270 { "January", TM_JANUARY }, 271 { "February", TM_FEBRUARY }, 272 { "March", TM_MARCH }, 273 { "April", TM_APRIL }, 274 { "May", TM_MAY }, 275 { "June", TM_JUNE }, 276 { "July", TM_JULY }, 277 { "August", TM_AUGUST }, 278 { "September", TM_SEPTEMBER }, 279 { "October", TM_OCTOBER }, 280 { "November", TM_NOVEMBER }, 281 { "December", TM_DECEMBER }, 282 { NULL, 0 } 283 }; 284 285 static struct lookup const wday_names[] = { 286 { "Sunday", TM_SUNDAY }, 287 { "Monday", TM_MONDAY }, 288 { "Tuesday", TM_TUESDAY }, 289 { "Wednesday", TM_WEDNESDAY }, 290 { "Thursday", TM_THURSDAY }, 291 { "Friday", TM_FRIDAY }, 292 { "Saturday", TM_SATURDAY }, 293 { NULL, 0 } 294 }; 295 296 static struct lookup const lasts[] = { 297 { "last-Sunday", TM_SUNDAY }, 298 { "last-Monday", TM_MONDAY }, 299 { "last-Tuesday", TM_TUESDAY }, 300 { "last-Wednesday", TM_WEDNESDAY }, 301 { "last-Thursday", TM_THURSDAY }, 302 { "last-Friday", TM_FRIDAY }, 303 { "last-Saturday", TM_SATURDAY }, 304 { NULL, 0 } 305 }; 306 307 static struct lookup const begin_years[] = { 308 { "minimum", YR_MINIMUM }, 309 { "maximum", YR_MAXIMUM }, 310 { NULL, 0 } 311 }; 312 313 static struct lookup const end_years[] = { 314 { "minimum", YR_MINIMUM }, 315 { "maximum", YR_MAXIMUM }, 316 { "only", YR_ONLY }, 317 { NULL, 0 } 318 }; 319 320 static struct lookup const leap_types[] = { 321 { "Rolling", TRUE }, 322 { "Stationary", FALSE }, 323 { NULL, 0 } 324 }; 325 326 static const int len_months[2][MONSPERYEAR] = { 327 { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }, 328 { 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 } 329 }; 330 331 static const int len_years[2] = { 332 DAYSPERNYEAR, DAYSPERLYEAR 333 }; 334 335 static struct attype { 336 time_t at; 337 unsigned char type; 338 } attypes[TZ_MAX_TIMES]; 339 static long gmtoffs[TZ_MAX_TYPES]; 340 static char isdsts[TZ_MAX_TYPES]; 341 static unsigned char abbrinds[TZ_MAX_TYPES]; 342 static char ttisstds[TZ_MAX_TYPES]; 343 static char ttisgmts[TZ_MAX_TYPES]; 344 static char chars[TZ_MAX_CHARS]; 345 static time_t trans[TZ_MAX_LEAPS]; 346 static long corr[TZ_MAX_LEAPS]; 347 static char roll[TZ_MAX_LEAPS]; 348 349 /* 350 ** Memory allocation. 351 */ 352 353 static char * 354 memcheck(char * const ptr) 355 { 356 if (ptr == NULL) 357 errx(EXIT_FAILURE, _("memory exhausted")); 358 return ptr; 359 } 360 361 #define emalloc(size) memcheck(imalloc(size)) 362 #define erealloc(ptr, size) memcheck(irealloc((ptr), (size))) 363 #define ecpyalloc(ptr) memcheck(icpyalloc(ptr)) 364 #define ecatalloc(oldp, newp) memcheck(icatalloc((oldp), (newp))) 365 366 /* 367 ** Error handling. 368 */ 369 370 #if !(HAVE_STRERROR - 0) 371 static char * 372 strerror(int errnum) 373 { 374 extern char * sys_errlist[]; 375 extern int sys_nerr; 376 377 return (errnum > 0 && errnum <= sys_nerr) ? 378 sys_errlist[errnum] : _("Unknown system error"); 379 } 380 #endif /* !(HAVE_STRERROR - 0) */ 381 382 static void 383 eats(const char * const name, const int num, 384 const char * const rname, const int rnum) 385 { 386 filename = name; 387 linenum = num; 388 rfilename = rname; 389 rlinenum = rnum; 390 } 391 392 static void 393 eat(const char * const name, const int num) 394 { 395 eats(name, num, (char *) NULL, -1); 396 } 397 398 static void 399 error(const char * const string) 400 { 401 /* 402 ** Match the format of "cc" to allow sh users to 403 ** zic ... 2>&1 | error -t "*" -v 404 ** on BSD systems. 405 */ 406 fprintf(stderr, _("\"%s\", line %d: %s"), 407 filename, linenum, string); 408 if (rfilename != NULL) 409 fprintf(stderr, _(" (rule from \"%s\", line %d)"), 410 rfilename, rlinenum); 411 fprintf(stderr, "\n"); 412 ++errors; 413 } 414 415 static void 416 warning(const char * const string) 417 { 418 char * cp; 419 420 cp = ecpyalloc(_("warning: ")); 421 cp = ecatalloc(cp, string); 422 error(cp); 423 ifree(cp); 424 --errors; 425 } 426 427 static void 428 usage(void) 429 { 430 fprintf(stderr, "%s\n%s\n", 431 _("usage: zic [-s] [-v] [-l localtime] [-p posixrules] [-d directory]"), 432 _(" [-L leapseconds] [-y yearistype] [filename ... ]")); 433 exit(EXIT_FAILURE); 434 } 435 436 static const char * psxrules; 437 static const char * lcltime; 438 static const char * directory; 439 static const char * leapsec; 440 static const char * yitcommand; 441 static int sflag = FALSE; 442 static int Dflag; 443 static uid_t uflag = (uid_t)-1; 444 static gid_t gflag = (gid_t)-1; 445 static mode_t mflag = (S_IRUSR | S_IRGRP | S_IROTH 446 | S_IWUSR); 447 448 int 449 main(int argc, char *argv[]) 450 { 451 int i; 452 int j; 453 int c; 454 455 #ifdef unix 456 umask(umask(S_IWGRP | S_IWOTH) | (S_IWGRP | S_IWOTH)); 457 #endif /* defined unix */ 458 #if HAVE_GETTEXT - 0 459 setlocale(LC_MESSAGES, ""); 460 #ifdef TZ_DOMAINDIR 461 bindtextdomain(TZ_DOMAIN, TZ_DOMAINDIR); 462 #endif /* defined TEXTDOMAINDIR */ 463 textdomain(TZ_DOMAIN); 464 #endif /* HAVE_GETTEXT - 0 */ 465 while ((c = getopt(argc, argv, "Dd:g:l:m:p:L:u:vsy:")) != -1) 466 switch (c) { 467 default: 468 usage(); 469 case 'D': 470 Dflag = 1; 471 break; 472 case 'd': 473 if (directory == NULL) 474 directory = optarg; 475 else 476 errx(EXIT_FAILURE, 477 _("more than one -d option specified")); 478 break; 479 case 'g': 480 setgroup(&gflag, optarg); 481 break; 482 case 'l': 483 if (lcltime == NULL) 484 lcltime = optarg; 485 else 486 errx(EXIT_FAILURE, 487 _("more than one -l option specified")); 488 break; 489 case 'm': 490 { 491 void *set = setmode(optarg); 492 getmode(set, mflag); 493 break; 494 } 495 case 'p': 496 if (psxrules == NULL) 497 psxrules = optarg; 498 else 499 errx(EXIT_FAILURE, 500 _("more than one -p option specified")); 501 break; 502 case 'u': 503 setuser(&uflag, optarg); 504 break; 505 case 'y': 506 if (yitcommand == NULL) 507 yitcommand = optarg; 508 else 509 errx(EXIT_FAILURE, 510 _("more than one -y option specified")); 511 break; 512 case 'L': 513 if (leapsec == NULL) 514 leapsec = optarg; 515 else 516 errx(EXIT_FAILURE, 517 _("more than one -L option specified")); 518 break; 519 case 'v': 520 noise = TRUE; 521 break; 522 case 's': 523 sflag = TRUE; 524 break; 525 } 526 if (optind == argc - 1 && strcmp(argv[optind], "=") == 0) 527 usage(); /* usage message by request */ 528 if (directory == NULL) 529 directory = TZDIR; 530 if (yitcommand == NULL) 531 yitcommand = "yearistype"; 532 533 setboundaries(); 534 535 if (optind < argc && leapsec != NULL) { 536 infile(leapsec); 537 adjleap(); 538 } 539 540 for (i = optind; i < argc; ++i) 541 infile(argv[i]); 542 if (errors) 543 exit(EXIT_FAILURE); 544 associate(); 545 for (i = 0; i < nzones; i = j) { 546 /* 547 ** Find the next non-continuation zone entry. 548 */ 549 for (j = i + 1; j < nzones && zones[j].z_name == NULL; ++j) 550 continue; 551 outzone(&zones[i], j - i); 552 } 553 /* 554 ** Make links. 555 */ 556 for (i = 0; i < nlinks; ++i) 557 dolink(links[i].l_from, links[i].l_to); 558 if (lcltime != NULL) 559 dolink(lcltime, TZDEFAULT); 560 if (psxrules != NULL) 561 dolink(psxrules, TZDEFRULES); 562 return (errors == 0) ? EXIT_SUCCESS : EXIT_FAILURE; 563 } 564 565 static void 566 dolink(const char * const fromfile, const char * const tofile) 567 { 568 char *fromname; 569 char *toname; 570 571 if (fromfile[0] == '/') 572 fromname = ecpyalloc(fromfile); 573 else { 574 fromname = ecpyalloc(directory); 575 fromname = ecatalloc(fromname, "/"); 576 fromname = ecatalloc(fromname, fromfile); 577 } 578 if (tofile[0] == '/') 579 toname = ecpyalloc(tofile); 580 else { 581 toname = ecpyalloc(directory); 582 toname = ecatalloc(toname, "/"); 583 toname = ecatalloc(toname, tofile); 584 } 585 /* 586 ** We get to be careful here since 587 ** there's a fair chance of root running us. 588 */ 589 if (!itsdir(toname)) 590 remove(toname); 591 if (link(fromname, toname) != 0) { 592 int result; 593 594 if (mkdirs(toname) != 0) 595 exit(EXIT_FAILURE); 596 result = link(fromname, toname); 597 #if (HAVE_SYMLINK - 0) 598 if (result != 0) { 599 result = symlink(fromname, toname); 600 if (result == 0) 601 warning(_("hard link failed, symbolic link used")); 602 } 603 #endif 604 if (result != 0) { 605 err(EXIT_FAILURE, _("can't link from %s to %s"), 606 fromname, toname); 607 } 608 } 609 ifree(fromname); 610 ifree(toname); 611 } 612 613 #ifndef INT_MAX 614 #define INT_MAX ((int) (((unsigned)~0)>>1)) 615 #endif /* !defined INT_MAX */ 616 617 #ifndef INT_MIN 618 #define INT_MIN ((int) ~(((unsigned)~0)>>1)) 619 #endif /* !defined INT_MIN */ 620 621 /* 622 ** The tz file format currently allows at most 32-bit quantities. 623 ** This restriction should be removed before signed 32-bit values 624 ** wrap around in 2038, but unfortunately this will require a 625 ** change to the tz file format. 626 */ 627 628 #define MAX_BITS_IN_FILE 32 629 #define TIME_T_BITS_IN_FILE ((TYPE_BIT(time_t) < MAX_BITS_IN_FILE) ? TYPE_BIT(time_t) : MAX_BITS_IN_FILE) 630 631 static void 632 setboundaries(void) 633 { 634 if (TYPE_SIGNED(time_t)) { 635 min_time = ~ (time_t) 0; 636 min_time <<= TIME_T_BITS_IN_FILE - 1; 637 max_time = ~ (time_t) 0 - min_time; 638 if (sflag) 639 min_time = 0; 640 } else { 641 min_time = 0; 642 max_time = 2 - sflag; 643 max_time <<= TIME_T_BITS_IN_FILE - 1; 644 --max_time; 645 } 646 min_year = TM_YEAR_BASE + gmtime(&min_time)->tm_year; 647 max_year = TM_YEAR_BASE + gmtime(&max_time)->tm_year; 648 min_year_representable = min_year; 649 max_year_representable = max_year; 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 int hh, mm, ss, sign; 847 848 if (string == NULL || *string == '\0') 849 return 0; 850 if (!signable) 851 sign = 1; 852 else if (*string == '-') { 853 sign = -1; 854 ++string; 855 } else sign = 1; 856 if (sscanf(string, scheck(string, "%d"), &hh) == 1) 857 mm = ss = 0; 858 else if (sscanf(string, scheck(string, "%d:%d"), &hh, &mm) == 2) 859 ss = 0; 860 else if (sscanf(string, scheck(string, "%d:%d:%d"), 861 &hh, &mm, &ss) != 3) { 862 error(errstring); 863 return 0; 864 } 865 if ((hh < 0 || hh >= HOURSPERDAY || 866 mm < 0 || mm >= MINSPERHOUR || 867 ss < 0 || ss > SECSPERMIN) && 868 !(hh == HOURSPERDAY && mm == 0 && ss == 0)) { 869 error(errstring); 870 return 0; 871 } 872 return eitol(sign) * 873 (eitol(hh * MINSPERHOUR + mm) * 874 eitol(SECSPERMIN) + eitol(ss)); 875 } 876 877 static void 878 inrule(char ** const fields, const int nfields) 879 { 880 static struct rule r; 881 882 if (nfields != RULE_FIELDS) { 883 error(_("wrong number of fields on Rule line")); 884 return; 885 } 886 if (*fields[RF_NAME] == '\0') { 887 error(_("nameless rule")); 888 return; 889 } 890 r.r_filename = filename; 891 r.r_linenum = linenum; 892 r.r_stdoff = gethms(fields[RF_STDOFF], _("invalid saved time"), TRUE); 893 rulesub(&r, fields[RF_LOYEAR], fields[RF_HIYEAR], fields[RF_COMMAND], 894 fields[RF_MONTH], fields[RF_DAY], fields[RF_TOD]); 895 r.r_name = ecpyalloc(fields[RF_NAME]); 896 r.r_abbrvar = ecpyalloc(fields[RF_ABBRVAR]); 897 rules = (struct rule *) (void *) erealloc((char *) rules, 898 (int) ((nrules + 1) * sizeof *rules)); 899 rules[nrules++] = r; 900 } 901 902 static int 903 inzone(char ** const fields, const int nfields) 904 { 905 int i; 906 static char *buf; 907 908 if (nfields < ZONE_MINFIELDS || nfields > ZONE_MAXFIELDS) { 909 error(_("wrong number of fields on Zone line")); 910 return FALSE; 911 } 912 if (strcmp(fields[ZF_NAME], TZDEFAULT) == 0 && lcltime != NULL) { 913 buf = erealloc(buf, (int) (132 + strlen(TZDEFAULT))); 914 sprintf(buf, 915 _("\"Zone %s\" line and -l option are mutually exclusive"), 916 TZDEFAULT); 917 error(buf); 918 return FALSE; 919 } 920 if (strcmp(fields[ZF_NAME], TZDEFRULES) == 0 && psxrules != NULL) { 921 buf = erealloc(buf, (int) (132 + strlen(TZDEFRULES))); 922 sprintf(buf, 923 _("\"Zone %s\" line and -p option are mutually exclusive"), 924 TZDEFRULES); 925 error(buf); 926 return FALSE; 927 } 928 for (i = 0; i < nzones; ++i) 929 if (zones[i].z_name != NULL && 930 strcmp(zones[i].z_name, fields[ZF_NAME]) == 0) { 931 buf = erealloc(buf, (int) (132 + 932 strlen(fields[ZF_NAME]) + 933 strlen(zones[i].z_filename))); 934 sprintf(buf, 935 _("duplicate zone name %s (file \"%s\", line %d)"), 936 fields[ZF_NAME], 937 zones[i].z_filename, 938 zones[i].z_linenum); 939 error(buf); 940 return FALSE; 941 } 942 return inzsub(fields, nfields, FALSE); 943 } 944 945 static int 946 inzcont(char ** const fields, const int nfields) 947 { 948 if (nfields < ZONEC_MINFIELDS || nfields > ZONEC_MAXFIELDS) { 949 error(_("wrong number of fields on Zone continuation line")); 950 return FALSE; 951 } 952 return inzsub(fields, nfields, TRUE); 953 } 954 955 static int 956 inzsub(char ** const fields, const int nfields, const int iscont) 957 { 958 char *cp; 959 static struct zone z; 960 int i_gmtoff, i_rule, i_format; 961 int i_untilyear, i_untilmonth; 962 int i_untilday, i_untiltime; 963 int hasuntil; 964 965 if (iscont) { 966 i_gmtoff = ZFC_GMTOFF; 967 i_rule = ZFC_RULE; 968 i_format = ZFC_FORMAT; 969 i_untilyear = ZFC_TILYEAR; 970 i_untilmonth = ZFC_TILMONTH; 971 i_untilday = ZFC_TILDAY; 972 i_untiltime = ZFC_TILTIME; 973 z.z_name = NULL; 974 } else { 975 i_gmtoff = ZF_GMTOFF; 976 i_rule = ZF_RULE; 977 i_format = ZF_FORMAT; 978 i_untilyear = ZF_TILYEAR; 979 i_untilmonth = ZF_TILMONTH; 980 i_untilday = ZF_TILDAY; 981 i_untiltime = ZF_TILTIME; 982 z.z_name = ecpyalloc(fields[ZF_NAME]); 983 } 984 z.z_filename = filename; 985 z.z_linenum = linenum; 986 z.z_gmtoff = gethms(fields[i_gmtoff], _("invalid UTC offset"), TRUE); 987 if ((cp = strchr(fields[i_format], '%')) != 0) { 988 if (*++cp != 's' || strchr(cp, '%') != 0) { 989 error(_("invalid abbreviation format")); 990 return FALSE; 991 } 992 } 993 z.z_rule = ecpyalloc(fields[i_rule]); 994 z.z_format = ecpyalloc(fields[i_format]); 995 hasuntil = nfields > i_untilyear; 996 if (hasuntil) { 997 z.z_untilrule.r_filename = filename; 998 z.z_untilrule.r_linenum = linenum; 999 rulesub(&z.z_untilrule, 1000 fields[i_untilyear], 1001 "only", 1002 "", 1003 (nfields > i_untilmonth) ? 1004 fields[i_untilmonth] : "Jan", 1005 (nfields > i_untilday) ? fields[i_untilday] : "1", 1006 (nfields > i_untiltime) ? fields[i_untiltime] : "0"); 1007 z.z_untiltime = rpytime(&z.z_untilrule, 1008 z.z_untilrule.r_loyear); 1009 if (iscont && nzones > 0 && 1010 z.z_untiltime > min_time && 1011 z.z_untiltime < max_time && 1012 zones[nzones - 1].z_untiltime > min_time && 1013 zones[nzones - 1].z_untiltime < max_time && 1014 zones[nzones - 1].z_untiltime >= z.z_untiltime) { 1015 error(_("Zone continuation line end time is not after end time of previous line")); 1016 return FALSE; 1017 } 1018 } 1019 zones = (struct zone *) (void *) erealloc((char *) zones, 1020 (int) ((nzones + 1) * sizeof *zones)); 1021 zones[nzones++] = z; 1022 /* 1023 ** If there was an UNTIL field on this line, 1024 ** there's more information about the zone on the next line. 1025 */ 1026 return hasuntil; 1027 } 1028 1029 static void 1030 inleap(char ** const fields, const int nfields) 1031 { 1032 const char *cp; 1033 const struct lookup *lp; 1034 int i, j; 1035 int year, month, day; 1036 long dayoff, tod; 1037 time_t t; 1038 1039 if (nfields != LEAP_FIELDS) { 1040 error(_("wrong number of fields on Leap line")); 1041 return; 1042 } 1043 dayoff = 0; 1044 cp = fields[LP_YEAR]; 1045 if (sscanf(cp, scheck(cp, "%d"), &year) != 1) { 1046 /* 1047 * Leapin' Lizards! 1048 */ 1049 error(_("invalid leaping year")); 1050 return; 1051 } 1052 j = EPOCH_YEAR; 1053 while (j != year) { 1054 if (year > j) { 1055 i = len_years[isleap(j)]; 1056 ++j; 1057 } else { 1058 --j; 1059 i = -len_years[isleap(j)]; 1060 } 1061 dayoff = oadd(dayoff, eitol(i)); 1062 } 1063 if ((lp = byword(fields[LP_MONTH], mon_names)) == NULL) { 1064 error(_("invalid month name")); 1065 return; 1066 } 1067 month = lp->l_value; 1068 j = TM_JANUARY; 1069 while (j != month) { 1070 i = len_months[isleap(year)][j]; 1071 dayoff = oadd(dayoff, eitol(i)); 1072 ++j; 1073 } 1074 cp = fields[LP_DAY]; 1075 if (sscanf(cp, scheck(cp, "%d"), &day) != 1 || 1076 day <= 0 || day > len_months[isleap(year)][month]) { 1077 error(_("invalid day of month")); 1078 return; 1079 } 1080 dayoff = oadd(dayoff, eitol(day - 1)); 1081 if (dayoff < 0 && !TYPE_SIGNED(time_t)) { 1082 error(_("time before zero")); 1083 return; 1084 } 1085 t = (time_t) dayoff * SECSPERDAY; 1086 /* 1087 ** Cheap overflow check. 1088 */ 1089 if (t / SECSPERDAY != dayoff) { 1090 error(_("time overflow")); 1091 return; 1092 } 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(_("illegal Rolling/Stationary field on Leap line")); 1117 return; 1118 } 1119 leapadd(tadd(t, tod), positive, lp->l_value, count); 1120 } 1121 } 1122 1123 static void 1124 inlink(char ** const fields, const int nfields) 1125 { 1126 struct link l; 1127 1128 if (nfields != LINK_FIELDS) { 1129 error(_("wrong number of fields on Link line")); 1130 return; 1131 } 1132 if (*fields[LF_FROM] == '\0') { 1133 error(_("blank FROM field on Link line")); 1134 return; 1135 } 1136 if (*fields[LF_TO] == '\0') { 1137 error(_("blank TO field on Link line")); 1138 return; 1139 } 1140 l.l_filename = filename; 1141 l.l_linenum = linenum; 1142 l.l_from = ecpyalloc(fields[LF_FROM]); 1143 l.l_to = ecpyalloc(fields[LF_TO]); 1144 links = (struct link *) (void *) erealloc((char *) links, 1145 (int) ((nlinks + 1) * sizeof *links)); 1146 links[nlinks++] = l; 1147 } 1148 1149 static void 1150 rulesub(struct rule * const rp, 1151 const char * const loyearp, 1152 const char * const hiyearp, 1153 const char * const typep, 1154 const char * const monthp, 1155 const char * const dayp, 1156 const char * const timep) 1157 { 1158 const struct lookup *lp; 1159 const char *cp; 1160 char *dp; 1161 char *ep; 1162 1163 if ((lp = byword(monthp, mon_names)) == NULL) { 1164 error(_("invalid month name")); 1165 return; 1166 } 1167 rp->r_month = lp->l_value; 1168 rp->r_todisstd = FALSE; 1169 rp->r_todisgmt = FALSE; 1170 dp = ecpyalloc(timep); 1171 if (*dp != '\0') { 1172 ep = dp + strlen(dp) - 1; 1173 switch (lowerit(*ep)) { 1174 case 's': /* Standard */ 1175 rp->r_todisstd = TRUE; 1176 rp->r_todisgmt = FALSE; 1177 *ep = '\0'; 1178 break; 1179 case 'w': /* Wall */ 1180 rp->r_todisstd = FALSE; 1181 rp->r_todisgmt = FALSE; 1182 *ep = '\0'; 1183 break; 1184 case 'g': /* Greenwich */ 1185 case 'u': /* Universal */ 1186 case 'z': /* Zulu */ 1187 rp->r_todisstd = TRUE; 1188 rp->r_todisgmt = TRUE; 1189 *ep = '\0'; 1190 break; 1191 } 1192 } 1193 rp->r_tod = gethms(dp, _("invalid time of day"), FALSE); 1194 ifree(dp); 1195 /* 1196 ** Year work. 1197 */ 1198 cp = loyearp; 1199 lp = byword(cp, begin_years); 1200 if (lp != NULL) switch ((int) lp->l_value) { 1201 case YR_MINIMUM: 1202 rp->r_loyear = INT_MIN; 1203 break; 1204 case YR_MAXIMUM: 1205 rp->r_loyear = INT_MAX; 1206 break; 1207 default: /* "cannot happen" */ 1208 errx(EXIT_FAILURE, 1209 _("panic: invalid l_value %d"), lp->l_value); 1210 } else if (sscanf(cp, scheck(cp, "%d"), &rp->r_loyear) != 1) { 1211 error(_("invalid starting year")); 1212 return; 1213 } else if (noise) { 1214 if (rp->r_loyear < min_year_representable) 1215 warning(_("starting year too low to be represented")); 1216 else if (rp->r_loyear > max_year_representable) 1217 warning(_("starting year too high to be represented")); 1218 } 1219 cp = hiyearp; 1220 if ((lp = byword(cp, end_years)) != NULL) switch ((int) lp->l_value) { 1221 case YR_MINIMUM: 1222 rp->r_hiyear = INT_MIN; 1223 break; 1224 case YR_MAXIMUM: 1225 rp->r_hiyear = INT_MAX; 1226 break; 1227 case YR_ONLY: 1228 rp->r_hiyear = rp->r_loyear; 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_hiyear) != 1) { 1234 error(_("invalid ending year")); 1235 return; 1236 } else if (noise) { 1237 if (rp->r_loyear < min_year_representable) 1238 warning(_("starting year too low to be represented")); 1239 else if (rp->r_loyear > max_year_representable) 1240 warning(_("starting year too high to be represented")); 1241 } 1242 if (rp->r_loyear > rp->r_hiyear) { 1243 error(_("starting year greater than ending year")); 1244 return; 1245 } 1246 if (*typep == '\0') 1247 rp->r_yrtype = NULL; 1248 else { 1249 if (rp->r_loyear == rp->r_hiyear) { 1250 error(_("typed single year")); 1251 return; 1252 } 1253 rp->r_yrtype = ecpyalloc(typep); 1254 } 1255 if (rp->r_loyear < min_year && rp->r_loyear > 0) 1256 min_year = rp->r_loyear; 1257 /* 1258 ** Day work. 1259 ** Accept things such as: 1260 ** 1 1261 ** last-Sunday 1262 ** Sun<=20 1263 ** Sun>=7 1264 */ 1265 dp = ecpyalloc(dayp); 1266 if ((lp = byword(dp, lasts)) != NULL) { 1267 rp->r_dycode = DC_DOWLEQ; 1268 rp->r_wday = lp->l_value; 1269 rp->r_dayofmonth = len_months[1][rp->r_month]; 1270 } else { 1271 if ((ep = strchr(dp, '<')) != 0) 1272 rp->r_dycode = DC_DOWLEQ; 1273 else if ((ep = strchr(dp, '>')) != 0) 1274 rp->r_dycode = DC_DOWGEQ; 1275 else { 1276 ep = dp; 1277 rp->r_dycode = DC_DOM; 1278 } 1279 if (rp->r_dycode != DC_DOM) { 1280 *ep++ = 0; 1281 if (*ep++ != '=') { 1282 error(_("invalid day of month")); 1283 ifree(dp); 1284 return; 1285 } 1286 if ((lp = byword(dp, wday_names)) == NULL) { 1287 error(_("invalid weekday name")); 1288 ifree(dp); 1289 return; 1290 } 1291 rp->r_wday = lp->l_value; 1292 } 1293 if (sscanf(ep, scheck(ep, "%d"), &rp->r_dayofmonth) != 1 || 1294 rp->r_dayofmonth <= 0 || 1295 (rp->r_dayofmonth > len_months[1][rp->r_month])) { 1296 error(_("invalid day of month")); 1297 ifree(dp); 1298 return; 1299 } 1300 } 1301 ifree(dp); 1302 } 1303 1304 static void 1305 convert(const long val, char * const buf) 1306 { 1307 int i; 1308 long shift; 1309 1310 for (i = 0, shift = 24; i < 4; ++i, shift -= 8) 1311 buf[i] = val >> shift; 1312 } 1313 1314 static void 1315 puttzcode(const long val, FILE * const fp) 1316 { 1317 char buf[4]; 1318 1319 convert(val, buf); 1320 fwrite((void *) buf, (size_t) sizeof buf, (size_t) 1, fp); 1321 } 1322 1323 static int 1324 atcomp(const void *avp, const void *bvp) 1325 { 1326 const struct attype *ap = avp; 1327 const struct attype *bp = bvp; 1328 1329 if (ap->at < bp->at) 1330 return -1; 1331 else if (ap->at > bp->at) 1332 return 1; 1333 else return 0; 1334 } 1335 1336 static void 1337 writezone(const char * const name) 1338 { 1339 FILE * fp; 1340 int i, j; 1341 static char *fullname; 1342 static struct tzhead tzh; 1343 time_t ats[TZ_MAX_TIMES]; 1344 unsigned char types[TZ_MAX_TIMES]; 1345 1346 /* 1347 ** Sort. 1348 */ 1349 if (timecnt > 1) 1350 qsort((void *) attypes, (size_t) timecnt, 1351 (size_t) sizeof *attypes, atcomp); 1352 /* 1353 ** Optimize. 1354 */ 1355 { 1356 int fromi; 1357 int toi; 1358 1359 toi = 0; 1360 fromi = 0; 1361 while (fromi < timecnt && attypes[fromi].at < min_time) 1362 ++fromi; 1363 if (isdsts[0] == 0) 1364 while (fromi < timecnt && attypes[fromi].type == 0) 1365 ++fromi; /* handled by default rule */ 1366 for ( ; fromi < timecnt; ++fromi) { 1367 if (toi != 0 1368 && ((attypes[fromi].at 1369 + gmtoffs[attypes[toi - 1].type]) 1370 <= (attypes[toi - 1].at 1371 + gmtoffs[toi == 1 ? 0 1372 : attypes[toi - 2].type]))) { 1373 attypes[toi - 1].type = attypes[fromi].type; 1374 continue; 1375 } 1376 if (toi == 0 || 1377 attypes[toi - 1].type != attypes[fromi].type) 1378 attypes[toi++] = attypes[fromi]; 1379 } 1380 timecnt = toi; 1381 } 1382 /* 1383 ** Transfer. 1384 */ 1385 for (i = 0; i < timecnt; ++i) { 1386 ats[i] = attypes[i].at; 1387 types[i] = attypes[i].type; 1388 } 1389 fullname = erealloc(fullname, 1390 (int) (strlen(directory) + 1 + strlen(name) + 1)); 1391 sprintf(fullname, "%s/%s", directory, name); 1392 1393 /* 1394 * Remove old file, if any, to snap links. 1395 */ 1396 if (!itsdir(fullname) && remove(fullname) != 0 && errno != ENOENT) 1397 err(EXIT_FAILURE, _("can't remove %s"), fullname); 1398 1399 if ((fp = fopen(fullname, "wb")) == NULL) { 1400 if (mkdirs(fullname) != 0) 1401 exit(EXIT_FAILURE); 1402 if ((fp = fopen(fullname, "wb")) == NULL) 1403 err(EXIT_FAILURE, _("can't create %s"), fullname); 1404 } 1405 convert(eitol(typecnt), tzh.tzh_ttisgmtcnt); 1406 convert(eitol(typecnt), tzh.tzh_ttisstdcnt); 1407 convert(eitol(leapcnt), tzh.tzh_leapcnt); 1408 convert(eitol(timecnt), tzh.tzh_timecnt); 1409 convert(eitol(typecnt), tzh.tzh_typecnt); 1410 convert(eitol(charcnt), tzh.tzh_charcnt); 1411 strncpy(tzh.tzh_magic, TZ_MAGIC, sizeof tzh.tzh_magic); 1412 #define DO(field) fwrite((void *) tzh.field, (size_t) sizeof tzh.field, (size_t) 1, fp) 1413 DO(tzh_magic); 1414 DO(tzh_reserved); 1415 DO(tzh_ttisgmtcnt); 1416 DO(tzh_ttisstdcnt); 1417 DO(tzh_leapcnt); 1418 DO(tzh_timecnt); 1419 DO(tzh_typecnt); 1420 DO(tzh_charcnt); 1421 #undef DO 1422 for (i = 0; i < timecnt; ++i) { 1423 j = leapcnt; 1424 while (--j >= 0) 1425 if (ats[i] >= trans[j]) { 1426 ats[i] = tadd(ats[i], corr[j]); 1427 break; 1428 } 1429 puttzcode((long) ats[i], fp); 1430 } 1431 if (timecnt > 0) 1432 fwrite((void *) types, (size_t) sizeof types[0], 1433 (size_t) timecnt, fp); 1434 for (i = 0; i < typecnt; ++i) { 1435 puttzcode((long) gmtoffs[i], fp); 1436 putc(isdsts[i], fp); 1437 putc(abbrinds[i], fp); 1438 } 1439 if (charcnt != 0) 1440 fwrite((void *) chars, (size_t) sizeof chars[0], 1441 (size_t) charcnt, fp); 1442 for (i = 0; i < leapcnt; ++i) { 1443 if (roll[i]) { 1444 if (timecnt == 0 || trans[i] < ats[0]) { 1445 j = 0; 1446 while (isdsts[j]) 1447 if (++j >= typecnt) { 1448 j = 0; 1449 break; 1450 } 1451 } else { 1452 j = 1; 1453 while (j < timecnt && trans[i] >= ats[j]) 1454 ++j; 1455 j = types[j - 1]; 1456 } 1457 puttzcode((long) tadd(trans[i], -gmtoffs[j]), fp); 1458 } else puttzcode((long) trans[i], fp); 1459 puttzcode((long) corr[i], fp); 1460 } 1461 for (i = 0; i < typecnt; ++i) 1462 putc(ttisstds[i], fp); 1463 for (i = 0; i < typecnt; ++i) 1464 putc(ttisgmts[i], fp); 1465 if (ferror(fp) || fclose(fp)) 1466 errx(EXIT_FAILURE, _("error writing %s"), fullname); 1467 if (chmod(fullname, mflag) < 0) 1468 err(EXIT_FAILURE, _("cannot change mode of %s to %03o"), 1469 fullname, (unsigned)mflag); 1470 if ((uflag != (uid_t)-1 || gflag != (gid_t)-1) 1471 && chown(fullname, uflag, gflag) < 0) 1472 err(EXIT_FAILURE, _("cannot change ownership of %s"), 1473 fullname); 1474 } 1475 1476 static void 1477 doabbr(char * const abbr, const char * const format, 1478 const char * const letters, const int isdst) 1479 { 1480 if (strchr(format, '/') == NULL) { 1481 if (letters == NULL) 1482 strcpy(abbr, format); 1483 else sprintf(abbr, format, letters); 1484 } else if (isdst) 1485 strcpy(abbr, strchr(format, '/') + 1); 1486 else { 1487 strcpy(abbr, format); 1488 *strchr(abbr, '/') = '\0'; 1489 } 1490 } 1491 1492 static void 1493 outzone(const struct zone * const zpfirst, const int zonecount) 1494 { 1495 const struct zone *zp; 1496 struct rule *rp; 1497 int i, j; 1498 int usestart, useuntil; 1499 time_t starttime, untiltime; 1500 long gmtoff; 1501 long stdoff; 1502 int year; 1503 long startoff; 1504 int startttisstd; 1505 int startttisgmt; 1506 int type; 1507 char startbuf[BUFSIZ]; 1508 1509 INITIALIZE(untiltime); 1510 INITIALIZE(starttime); 1511 /* 1512 ** Now. . .finally. . .generate some useful data! 1513 */ 1514 timecnt = 0; 1515 typecnt = 0; 1516 charcnt = 0; 1517 /* 1518 ** A guess that may well be corrected later. 1519 */ 1520 stdoff = 0; 1521 /* 1522 ** Thanks to Earl Chew (earl@dnd.icp.nec.com.au) 1523 ** for noting the need to unconditionally initialize startttisstd. 1524 */ 1525 startttisstd = FALSE; 1526 startttisgmt = FALSE; 1527 for (i = 0; i < zonecount; ++i) { 1528 zp = &zpfirst[i]; 1529 usestart = i > 0 && (zp - 1)->z_untiltime > min_time; 1530 useuntil = i < (zonecount - 1); 1531 if (useuntil && zp->z_untiltime <= min_time) 1532 continue; 1533 gmtoff = zp->z_gmtoff; 1534 eat(zp->z_filename, zp->z_linenum); 1535 *startbuf = '\0'; 1536 startoff = zp->z_gmtoff; 1537 if (zp->z_nrules == 0) { 1538 stdoff = zp->z_stdoff; 1539 doabbr(startbuf, zp->z_format, 1540 (char *) NULL, stdoff != 0); 1541 type = addtype(oadd(zp->z_gmtoff, stdoff), 1542 startbuf, stdoff != 0, startttisstd, 1543 startttisgmt); 1544 if (usestart) { 1545 addtt(starttime, type); 1546 usestart = FALSE; 1547 } 1548 else if (stdoff != 0) 1549 addtt(min_time, type); 1550 } else for (year = min_year; year <= max_year; ++year) { 1551 if (useuntil && year > zp->z_untilrule.r_hiyear) 1552 break; 1553 /* 1554 ** Mark which rules to do in the current year. 1555 ** For those to do, calculate rpytime(rp, year); 1556 */ 1557 for (j = 0; j < zp->z_nrules; ++j) { 1558 rp = &zp->z_rules[j]; 1559 eats(zp->z_filename, zp->z_linenum, 1560 rp->r_filename, rp->r_linenum); 1561 rp->r_todo = year >= rp->r_loyear && 1562 year <= rp->r_hiyear && 1563 yearistype(year, rp->r_yrtype); 1564 if (rp->r_todo) 1565 rp->r_temp = rpytime(rp, year); 1566 } 1567 for ( ; ; ) { 1568 int k; 1569 time_t jtime, ktime; 1570 long offset; 1571 char buf[BUFSIZ]; 1572 1573 INITIALIZE(ktime); 1574 if (useuntil) { 1575 /* 1576 ** Turn untiltime into UTC 1577 ** assuming the current gmtoff and 1578 ** stdoff values. 1579 */ 1580 untiltime = zp->z_untiltime; 1581 if (!zp->z_untilrule.r_todisgmt) 1582 untiltime = tadd(untiltime, 1583 -gmtoff); 1584 if (!zp->z_untilrule.r_todisstd) 1585 untiltime = tadd(untiltime, 1586 -stdoff); 1587 } 1588 /* 1589 ** Find the rule (of those to do, if any) 1590 ** that takes effect earliest in the year. 1591 */ 1592 k = -1; 1593 for (j = 0; j < zp->z_nrules; ++j) { 1594 rp = &zp->z_rules[j]; 1595 if (!rp->r_todo) 1596 continue; 1597 eats(zp->z_filename, zp->z_linenum, 1598 rp->r_filename, rp->r_linenum); 1599 offset = rp->r_todisgmt ? 0 : gmtoff; 1600 if (!rp->r_todisstd) 1601 offset = oadd(offset, stdoff); 1602 jtime = rp->r_temp; 1603 if (jtime == min_time || 1604 jtime == max_time) 1605 continue; 1606 jtime = tadd(jtime, -offset); 1607 if (k < 0 || jtime < ktime) { 1608 k = j; 1609 ktime = jtime; 1610 } 1611 } 1612 if (k < 0) 1613 break; /* go on to next year */ 1614 rp = &zp->z_rules[k]; 1615 rp->r_todo = FALSE; 1616 if (useuntil && ktime >= untiltime) 1617 break; 1618 stdoff = rp->r_stdoff; 1619 if (usestart && ktime == starttime) 1620 usestart = FALSE; 1621 if (usestart) { 1622 if (ktime < starttime) { 1623 startoff = oadd(zp->z_gmtoff, 1624 stdoff); 1625 doabbr(startbuf, zp->z_format, 1626 rp->r_abbrvar, 1627 rp->r_stdoff != 0); 1628 continue; 1629 } 1630 if (*startbuf == '\0' && 1631 startoff == oadd(zp->z_gmtoff, 1632 stdoff)) { 1633 doabbr(startbuf, zp->z_format, 1634 rp->r_abbrvar, 1635 rp->r_stdoff != 0); 1636 } 1637 } 1638 eats(zp->z_filename, zp->z_linenum, 1639 rp->r_filename, rp->r_linenum); 1640 doabbr(buf, zp->z_format, rp->r_abbrvar, 1641 rp->r_stdoff != 0); 1642 offset = oadd(zp->z_gmtoff, rp->r_stdoff); 1643 type = addtype(offset, buf, rp->r_stdoff != 0, 1644 rp->r_todisstd, rp->r_todisgmt); 1645 addtt(ktime, type); 1646 } 1647 } 1648 if (usestart) { 1649 if (*startbuf == '\0' && 1650 zp->z_format != NULL && 1651 strchr(zp->z_format, '%') == NULL && 1652 strchr(zp->z_format, '/') == NULL) 1653 strcpy(startbuf, zp->z_format); 1654 eat(zp->z_filename, zp->z_linenum); 1655 if (*startbuf == '\0') 1656 error(_("can't determine time zone abbreviation to use just after until time")); 1657 else addtt(starttime, 1658 addtype(startoff, startbuf, 1659 startoff != zp->z_gmtoff, 1660 startttisstd, 1661 startttisgmt)); 1662 } 1663 /* 1664 ** Now we may get to set starttime for the next zone line. 1665 */ 1666 if (useuntil) { 1667 startttisstd = zp->z_untilrule.r_todisstd; 1668 startttisgmt = zp->z_untilrule.r_todisgmt; 1669 starttime = zp->z_untiltime; 1670 if (!startttisstd) 1671 starttime = tadd(starttime, -stdoff); 1672 if (!startttisgmt) 1673 starttime = tadd(starttime, -gmtoff); 1674 } 1675 } 1676 writezone(zpfirst->z_name); 1677 } 1678 1679 static void 1680 addtt(const time_t starttime, int type) 1681 { 1682 if (starttime <= min_time || 1683 (timecnt == 1 && attypes[0].at < min_time)) { 1684 gmtoffs[0] = gmtoffs[type]; 1685 isdsts[0] = isdsts[type]; 1686 ttisstds[0] = ttisstds[type]; 1687 ttisgmts[0] = ttisgmts[type]; 1688 if (abbrinds[type] != 0) 1689 strcpy(chars, &chars[abbrinds[type]]); 1690 abbrinds[0] = 0; 1691 charcnt = strlen(chars) + 1; 1692 typecnt = 1; 1693 timecnt = 0; 1694 type = 0; 1695 } 1696 if (timecnt >= TZ_MAX_TIMES) { 1697 error(_("too many transitions?!")); 1698 exit(EXIT_FAILURE); 1699 } 1700 attypes[timecnt].at = starttime; 1701 attypes[timecnt].type = type; 1702 ++timecnt; 1703 } 1704 1705 static int 1706 addtype(const long gmtoff, const char * const abbr, const int isdst, 1707 const int ttisstd, const int ttisgmt) 1708 { 1709 int i, j; 1710 1711 if (isdst != TRUE && isdst != FALSE) { 1712 error(_("internal error - addtype called with bad isdst")); 1713 exit(EXIT_FAILURE); 1714 } 1715 if (ttisstd != TRUE && ttisstd != FALSE) { 1716 error(_("internal error - addtype called with bad ttisstd")); 1717 exit(EXIT_FAILURE); 1718 } 1719 if (ttisgmt != TRUE && ttisgmt != FALSE) { 1720 error(_("internal error - addtype called with bad ttisgmt")); 1721 exit(EXIT_FAILURE); 1722 } 1723 /* 1724 ** See if there's already an entry for this zone type. 1725 ** If so, just return its index. 1726 */ 1727 for (i = 0; i < typecnt; ++i) { 1728 if (gmtoff == gmtoffs[i] && isdst == isdsts[i] && 1729 strcmp(abbr, &chars[abbrinds[i]]) == 0 && 1730 ttisstd == ttisstds[i] && 1731 ttisgmt == ttisgmts[i]) 1732 return i; 1733 } 1734 /* 1735 ** There isn't one; add a new one, unless there are already too 1736 ** many. 1737 */ 1738 if (typecnt >= TZ_MAX_TYPES) { 1739 error(_("too many local time types")); 1740 exit(EXIT_FAILURE); 1741 } 1742 gmtoffs[i] = gmtoff; 1743 isdsts[i] = isdst; 1744 ttisstds[i] = ttisstd; 1745 ttisgmts[i] = ttisgmt; 1746 1747 for (j = 0; j < charcnt; ++j) 1748 if (strcmp(&chars[j], abbr) == 0) 1749 break; 1750 if (j == charcnt) 1751 newabbr(abbr); 1752 abbrinds[i] = j; 1753 ++typecnt; 1754 return i; 1755 } 1756 1757 static void 1758 leapadd(const time_t t, const int positive, const int rolling, int count) 1759 { 1760 int i, j; 1761 1762 if (leapcnt + (positive ? count : 1) > TZ_MAX_LEAPS) { 1763 error(_("too many leap seconds")); 1764 exit(EXIT_FAILURE); 1765 } 1766 for (i = 0; i < leapcnt; ++i) 1767 if (t <= trans[i]) { 1768 if (t == trans[i]) { 1769 error(_("repeated leap second moment")); 1770 exit(EXIT_FAILURE); 1771 } 1772 break; 1773 } 1774 do { 1775 for (j = leapcnt; j > i; --j) { 1776 trans[j] = trans[j - 1]; 1777 corr[j] = corr[j - 1]; 1778 roll[j] = roll[j - 1]; 1779 } 1780 trans[i] = t; 1781 corr[i] = positive ? 1L : eitol(-count); 1782 roll[i] = rolling; 1783 ++leapcnt; 1784 } while (positive && --count != 0); 1785 } 1786 1787 static void 1788 adjleap(void) 1789 { 1790 int i; 1791 long last = 0; 1792 1793 /* 1794 ** propagate leap seconds forward 1795 */ 1796 for (i = 0; i < leapcnt; ++i) { 1797 trans[i] = tadd(trans[i], last); 1798 last = corr[i] += last; 1799 } 1800 } 1801 1802 static int 1803 yearistype(const int year, const char * const type) 1804 { 1805 static char * buf; 1806 int result; 1807 1808 if (type == NULL || *type == '\0') 1809 return TRUE; 1810 buf = erealloc(buf, (int) (132 + strlen(yitcommand) + strlen(type))); 1811 sprintf(buf, "%s %d %s", yitcommand, year, type); 1812 result = system(buf); 1813 if (result == 0) 1814 return TRUE; 1815 if (result == (1 << 8)) 1816 return FALSE; 1817 error(_("wild result from command execution")); 1818 warnx(_("command was '%s', result was %d"), buf, result); 1819 for ( ; ; ) 1820 exit(EXIT_FAILURE); 1821 } 1822 1823 static int 1824 lowerit(int a) 1825 { 1826 a = (unsigned char) a; 1827 return (isascii(a) && isupper(a)) ? tolower(a) : a; 1828 } 1829 1830 static int 1831 ciequal(const char *ap, const char *bp) /* case-insensitive equality */ 1832 { 1833 while (lowerit(*ap) == lowerit(*bp++)) 1834 if (*ap++ == '\0') 1835 return TRUE; 1836 return FALSE; 1837 } 1838 1839 static int 1840 itsabbr(const char *abbr, const char *word) 1841 { 1842 if (lowerit(*abbr) != lowerit(*word)) 1843 return FALSE; 1844 ++word; 1845 while (*++abbr != '\0') 1846 do { 1847 if (*word == '\0') 1848 return FALSE; 1849 } while (lowerit(*word++) != lowerit(*abbr)); 1850 return TRUE; 1851 } 1852 1853 static const struct lookup * 1854 byword(const char * const word, const struct lookup * const table) 1855 { 1856 const struct lookup *foundlp; 1857 const struct lookup *lp; 1858 1859 if (word == NULL || table == NULL) 1860 return NULL; 1861 /* 1862 ** Look for exact match. 1863 */ 1864 for (lp = table; lp->l_word != NULL; ++lp) 1865 if (ciequal(word, lp->l_word)) 1866 return lp; 1867 /* 1868 ** Look for inexact match. 1869 */ 1870 foundlp = NULL; 1871 for (lp = table; lp->l_word != NULL; ++lp) 1872 if (itsabbr(word, lp->l_word)) { 1873 if (foundlp == NULL) 1874 foundlp = lp; 1875 else return NULL; /* multiple inexact matches */ 1876 } 1877 return foundlp; 1878 } 1879 1880 static char ** 1881 getfields(char *cp) 1882 { 1883 char *dp; 1884 char **array; 1885 int nsubs; 1886 1887 if (cp == NULL) 1888 return NULL; 1889 array = (char **) (void *) 1890 emalloc((int) ((strlen(cp) + 1) * sizeof *array)); 1891 nsubs = 0; 1892 for ( ; ; ) { 1893 while (isascii(*cp) && isspace((unsigned char) *cp)) 1894 ++cp; 1895 if (*cp == '\0' || *cp == '#') 1896 break; 1897 array[nsubs++] = dp = cp; 1898 do { 1899 if ((*dp = *cp++) != '"') 1900 ++dp; 1901 else while ((*dp = *cp++) != '"') 1902 if (*dp != '\0') 1903 ++dp; 1904 else error(_("odd number of quotation marks")); 1905 } while (*cp != '\0' && *cp != '#' && 1906 (!isascii(*cp) || !isspace((unsigned char) *cp))); 1907 if (isascii(*cp) && isspace((unsigned char) *cp)) 1908 ++cp; 1909 *dp = '\0'; 1910 } 1911 array[nsubs] = NULL; 1912 return array; 1913 } 1914 1915 static long 1916 oadd(const long t1, const long t2) 1917 { 1918 long t; 1919 1920 t = t1 + t2; 1921 if ((t2 > 0 && t <= t1) || (t2 < 0 && t >= t1)) { 1922 error(_("time overflow")); 1923 exit(EXIT_FAILURE); 1924 } 1925 return t; 1926 } 1927 1928 static time_t 1929 tadd(const time_t t1, const long t2) 1930 { 1931 time_t t; 1932 1933 if (t1 == max_time && t2 > 0) 1934 return max_time; 1935 if (t1 == min_time && t2 < 0) 1936 return min_time; 1937 t = t1 + t2; 1938 if ((t2 > 0 && t <= t1) || (t2 < 0 && t >= t1)) { 1939 error(_("time overflow")); 1940 exit(EXIT_FAILURE); 1941 } 1942 return t; 1943 } 1944 1945 /* 1946 ** Given a rule, and a year, compute the date - in seconds since January 1, 1947 ** 1970, 00:00 LOCAL time - in that year that the rule refers to. 1948 */ 1949 1950 static time_t 1951 rpytime(const struct rule * const rp, const int wantedy) 1952 { 1953 int y, m, i; 1954 long dayoff; /* with a nod to Margaret O. */ 1955 time_t t; 1956 1957 if (wantedy == INT_MIN) 1958 return min_time; 1959 if (wantedy == INT_MAX) 1960 return max_time; 1961 dayoff = 0; 1962 m = TM_JANUARY; 1963 y = EPOCH_YEAR; 1964 while (wantedy != y) { 1965 if (wantedy > y) { 1966 i = len_years[isleap(y)]; 1967 ++y; 1968 } else { 1969 --y; 1970 i = -len_years[isleap(y)]; 1971 } 1972 dayoff = oadd(dayoff, eitol(i)); 1973 } 1974 while (m != rp->r_month) { 1975 i = len_months[isleap(y)][m]; 1976 dayoff = oadd(dayoff, eitol(i)); 1977 ++m; 1978 } 1979 i = rp->r_dayofmonth; 1980 if (m == TM_FEBRUARY && i == 29 && !isleap(y)) { 1981 if (rp->r_dycode == DC_DOWLEQ) 1982 --i; 1983 else { 1984 error(_("use of 2/29 in non leap-year")); 1985 exit(EXIT_FAILURE); 1986 } 1987 } 1988 --i; 1989 dayoff = oadd(dayoff, eitol(i)); 1990 if (rp->r_dycode == DC_DOWGEQ || rp->r_dycode == DC_DOWLEQ) { 1991 long wday; 1992 1993 #define LDAYSPERWEEK ((long) DAYSPERWEEK) 1994 wday = eitol(EPOCH_WDAY); 1995 /* 1996 ** Don't trust mod of negative numbers. 1997 */ 1998 if (dayoff >= 0) 1999 wday = (wday + dayoff) % LDAYSPERWEEK; 2000 else { 2001 wday -= ((-dayoff) % LDAYSPERWEEK); 2002 if (wday < 0) 2003 wday += LDAYSPERWEEK; 2004 } 2005 while (wday != eitol(rp->r_wday)) 2006 if (rp->r_dycode == DC_DOWGEQ) { 2007 dayoff = oadd(dayoff, (long) 1); 2008 if (++wday >= LDAYSPERWEEK) 2009 wday = 0; 2010 ++i; 2011 } else { 2012 dayoff = oadd(dayoff, (long) -1); 2013 if (--wday < 0) 2014 wday = LDAYSPERWEEK - 1; 2015 --i; 2016 } 2017 if (i < 0 || i >= len_months[isleap(y)][m]) { 2018 error(_("no day in month matches rule")); 2019 exit(EXIT_FAILURE); 2020 } 2021 } 2022 if (dayoff < 0 && !TYPE_SIGNED(time_t)) 2023 return min_time; 2024 t = (time_t) dayoff * SECSPERDAY; 2025 /* 2026 ** Cheap overflow check. 2027 */ 2028 if (t / SECSPERDAY != dayoff) 2029 return (dayoff > 0) ? max_time : min_time; 2030 return tadd(t, rp->r_tod); 2031 } 2032 2033 static void 2034 newabbr(const char * const string) 2035 { 2036 int i; 2037 2038 i = strlen(string) + 1; 2039 if (charcnt + i > TZ_MAX_CHARS) { 2040 error(_("too many, or too long, time zone abbreviations")); 2041 exit(EXIT_FAILURE); 2042 } 2043 strcpy(&chars[charcnt], string); 2044 charcnt += eitol(i); 2045 } 2046 2047 static int 2048 mkdirs(char * const argname) 2049 { 2050 char *name; 2051 char *cp; 2052 2053 if (argname == NULL || *argname == '\0' || Dflag) 2054 return 0; 2055 cp = name = ecpyalloc(argname); 2056 while ((cp = strchr(cp + 1, '/')) != 0) { 2057 *cp = '\0'; 2058 #ifndef unix 2059 /* 2060 ** DOS drive specifier? 2061 */ 2062 if (isalpha((unsigned char) name[0]) && 2063 name[1] == ':' && name[2] == '\0') { 2064 *cp = '/'; 2065 continue; 2066 } 2067 #endif /* !defined unix */ 2068 if (!itsdir(name)) { 2069 /* 2070 ** It doesn't seem to exist, so we try to create it. 2071 ** Creation may fail because of the directory being 2072 ** created by some other multiprocessor, so we get 2073 ** to do extra checking. 2074 */ 2075 if (mkdir(name, (S_IRUSR | S_IWUSR | S_IXUSR 2076 | S_IRGRP | S_IXGRP | S_IROTH 2077 | S_IXOTH)) != 0 2078 && (errno != EEXIST || !itsdir(name))) { 2079 warn(_("can't create directory %s"), name); 2080 ifree(name); 2081 return -1; 2082 } 2083 } 2084 *cp = '/'; 2085 } 2086 ifree(name); 2087 return 0; 2088 } 2089 2090 static long 2091 eitol(const int i) 2092 { 2093 long l; 2094 2095 l = i; 2096 if ((i < 0 && l >= 0) || (i == 0 && l != 0) || (i > 0 && l <= 0)) 2097 errx(EXIT_FAILURE, _("%d did not sign extend correctly"), i); 2098 return l; 2099 } 2100 2101 #include <grp.h> 2102 #include <pwd.h> 2103 2104 static void 2105 setgroup(gid_t *flag, const char *name) 2106 { 2107 struct group *gr; 2108 2109 if (*flag != (gid_t)-1) 2110 errx(EXIT_FAILURE, _("multiple -g flags specified")); 2111 2112 gr = getgrnam(name); 2113 if (gr == 0) { 2114 char *ep; 2115 unsigned long ul; 2116 2117 ul = strtoul(name, &ep, 10); 2118 if (ul == (unsigned long)(gid_t)ul && *ep == '\0') { 2119 *flag = ul; 2120 return; 2121 } 2122 errx(EXIT_FAILURE, _("group `%s' not found"), name); 2123 } 2124 *flag = gr->gr_gid; 2125 } 2126 2127 static void 2128 setuser(uid_t *flag, const char *name) 2129 { 2130 struct passwd *pw; 2131 2132 if (*flag != (gid_t)-1) 2133 errx(EXIT_FAILURE, _("multiple -u flags specified")); 2134 2135 pw = getpwnam(name); 2136 if (pw == 0) { 2137 char *ep; 2138 unsigned long ul; 2139 2140 ul = strtoul(name, &ep, 10); 2141 if (ul == (unsigned long)(gid_t)ul && *ep == '\0') { 2142 *flag = ul; 2143 return; 2144 } 2145 errx(EXIT_FAILURE, _("user `%s' not found"), name); 2146 } 2147 *flag = pw->pw_uid; 2148 } 2149 2150 /* 2151 ** UNIX was a registered trademark of UNIX System Laboratories in 1993. 2152 */ 2153