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[glibc/history.git] / timezone / zic.c
blob2397a7841ede15cac644d1e41d22e68c6ba5502b
1 #ifndef lint
2 #ifndef NOID
3 static char elsieid[] = "@(#)zic.c 7.94";
4 #endif /* !defined NOID */
5 #endif /* !defined lint */
6
7 #include "private.h"
8 #include "locale.h"
9 #include "tzfile.h"
10 #ifdef unix
11 #include "sys/stat.h" /* for umask manifest constants */
12 #endif /* defined unix */
13
14 /*
15 ** On some ancient hosts, predicates like `isspace(C)' are defined
16 ** only if isascii(C) || C == EOF. Modern hosts obey the C Standard,
17 ** which says they are defined only if C == ((unsigned char) C) || C == EOF.
18 ** Neither the C Standard nor Posix require that `isascii' exist.
19 ** For portability, we check both ancient and modern requirements.
20 ** If isascii is not defined, the isascii check succeeds trivially.
21 */
22 #include "ctype.h"
23 #ifndef isascii
24 #define isascii(x) 1
25 #endif
26
27 struct rule {
28 const char * r_filename;
29 int r_linenum;
30 const char * r_name;
31
32 int r_loyear; /* for example, 1986 */
33 int r_hiyear; /* for example, 1986 */
34 const char * r_yrtype;
35
36 int r_month; /* 0..11 */
37
38 int r_dycode; /* see below */
39 int r_dayofmonth;
40 int r_wday;
41
42 long r_tod; /* time from midnight */
43 int r_todisstd; /* above is standard time if TRUE */
44 /* or wall clock time if FALSE */
45 int r_todisgmt; /* above is GMT if TRUE */
46 /* or local time if FALSE */
47 long r_stdoff; /* offset from standard time */
48 const char * r_abbrvar; /* variable part of abbreviation */
49
50 int r_todo; /* a rule to do (used in outzone) */
51 time_t r_temp; /* used in outzone */
52 };
53
54 /*
55 ** r_dycode r_dayofmonth r_wday
56 */
57
58 #define DC_DOM 0 /* 1..31 */ /* unused */
59 #define DC_DOWGEQ 1 /* 1..31 */ /* 0..6 (Sun..Sat) */
60 #define DC_DOWLEQ 2 /* 1..31 */ /* 0..6 (Sun..Sat) */
61
62 struct zone {
63 const char * z_filename;
64 int z_linenum;
65
66 const char * z_name;
67 long z_gmtoff;
68 const char * z_rule;
69 const char * z_format;
70
71 long z_stdoff;
72
73 struct rule * z_rules;
74 int z_nrules;
75
76 struct rule z_untilrule;
77 time_t z_untiltime;
78 };
79
80 extern int getopt P((int argc, char * const argv[],
81 const char * options));
82 extern int link P((const char * fromname, const char * toname));
83 extern char * optarg;
84 extern int optind;
85
86 static void addtt P((time_t starttime, int type));
87 static int addtype P((long gmtoff, const char * abbr, int isdst,
88 int ttisstd, int ttisgmt));
89 static void leapadd P((time_t t, int positive, int rolling, int count));
90 static void adjleap P((void));
91 static void associate P((void));
92 static int ciequal P((const char * ap, const char * bp));
93 static void convert P((long val, char * buf));
94 static void dolink P((const char * fromfile, const char * tofile));
95 static void doabbr P((char * abbr, const char * format,
96 const char * letters, int isdst));
97 static void eat P((const char * name, int num));
98 static void eats P((const char * name, int num,
99 const char * rname, int rnum));
100 static long eitol P((int i));
101 static void error P((const char * message));
102 static char ** getfields P((char * buf));
103 static long gethms P((const char * string, const char * errstrng,
104 int signable));
105 static void infile P((const char * filename));
106 static void inleap P((char ** fields, int nfields));
107 static void inlink P((char ** fields, int nfields));
108 static void inrule P((char ** fields, int nfields));
109 static int inzcont P((char ** fields, int nfields));
110 static int inzone P((char ** fields, int nfields));
111 static int inzsub P((char ** fields, int nfields, int iscont));
112 static int itsabbr P((const char * abbr, const char * word));
113 static int itsdir P((const char * name));
114 static int lowerit P((int c));
115 static char * memcheck P((char * tocheck));
116 static int mkdirs P((char * filename));
117 static void newabbr P((const char * abbr));
118 static long oadd P((long t1, long t2));
119 static void outzone P((const struct zone * zp, int ntzones));
120 static void puttzcode P((long code, FILE * fp));
121 static int rcomp P((const void * leftp, const void * rightp));
122 static time_t rpytime P((const struct rule * rp, int wantedy));
123 static void rulesub P((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 P((void));
128 static time_t tadd P((time_t t1, long t2));
129 static void usage P((void));
130 static void writezone P((const char * name));
131 static int yearistype P((int year, const char * type));
132
133 #if !(HAVE_STRERROR - 0)
134 static char * strerror P((int));
135 #endif /* !(HAVE_STRERROR - 0) */
136
137 static int charcnt;
138 static int errors;
139 static const char * filename;
140 static int leapcnt;
141 static int linenum;
142 static time_t max_time;
143 static int max_year;
144 static int max_year_representable;
145 static time_t min_time;
146 static int min_year;
147 static int min_year_representable;
148 static int noise;
149 static const char * rfilename;
150 static int rlinenum;
151 static const char * progname;
152 static int timecnt;
153 static int typecnt;
154
155 /*
156 ** Line codes.
157 */
158
159 #define LC_RULE 0
160 #define LC_ZONE 1
161 #define LC_LINK 2
162 #define LC_LEAP 3
163
164 /*
165 ** Which fields are which on a Zone line.
166 */
167
168 #define ZF_NAME 1
169 #define ZF_GMTOFF 2
170 #define ZF_RULE 3
171 #define ZF_FORMAT 4
172 #define ZF_TILYEAR 5
173 #define ZF_TILMONTH 6
174 #define ZF_TILDAY 7
175 #define ZF_TILTIME 8
176 #define ZONE_MINFIELDS 5
177 #define ZONE_MAXFIELDS 9
178
179 /*
180 ** Which fields are which on a Zone continuation line.
181 */
182
183 #define ZFC_GMTOFF 0
184 #define ZFC_RULE 1
185 #define ZFC_FORMAT 2
186 #define ZFC_TILYEAR 3
187 #define ZFC_TILMONTH 4
188 #define ZFC_TILDAY 5
189 #define ZFC_TILTIME 6
190 #define ZONEC_MINFIELDS 3
191 #define ZONEC_MAXFIELDS 7
192
193 /*
194 ** Which files are which on a Rule line.
195 */
196
197 #define RF_NAME 1
198 #define RF_LOYEAR 2
199 #define RF_HIYEAR 3
200 #define RF_COMMAND 4
201 #define RF_MONTH 5
202 #define RF_DAY 6
203 #define RF_TOD 7
204 #define RF_STDOFF 8
205 #define RF_ABBRVAR 9
206 #define RULE_FIELDS 10
207
208 /*
209 ** Which fields are which on a Link line.
210 */
211
212 #define LF_FROM 1
213 #define LF_TO 2
214 #define LINK_FIELDS 3
215
216 /*
217 ** Which fields are which on a Leap line.
218 */
219
220 #define LP_YEAR 1
221 #define LP_MONTH 2
222 #define LP_DAY 3
223 #define LP_TIME 4
224 #define LP_CORR 5
225 #define LP_ROLL 6
226 #define LEAP_FIELDS 7
227
228 /*
229 ** Year synonyms.
230 */
231
232 #define YR_MINIMUM 0
233 #define YR_MAXIMUM 1
234 #define YR_ONLY 2
235
236 static struct rule * rules;
237 static int nrules; /* number of rules */
238
239 static struct zone * zones;
240 static int nzones; /* number of zones */
241
242 struct link {
243 const char * l_filename;
244 int l_linenum;
245 const char * l_from;
246 const char * l_to;
247 };
248
249 static struct link * links;
250 static int nlinks;
251
252 struct lookup {
253 const char * l_word;
254 const int l_value;
255 };
256
257 static struct lookup const * byword P((const char * string,
258 const struct lookup * lp));
259
260 static struct lookup const line_codes[] = {
261 { "Rule", LC_RULE },
262 { "Zone", LC_ZONE },
263 { "Link", LC_LINK },
264 { "Leap", LC_LEAP },
265 { NULL, 0}
266 };
267
268 static struct lookup const mon_names[] = {
269 { "January", TM_JANUARY },
270 { "February", TM_FEBRUARY },
271 { "March", TM_MARCH },
272 { "April", TM_APRIL },
273 { "May", TM_MAY },
274 { "June", TM_JUNE },
275 { "July", TM_JULY },
276 { "August", TM_AUGUST },
277 { "September", TM_SEPTEMBER },
278 { "October", TM_OCTOBER },
279 { "November", TM_NOVEMBER },
280 { "December", TM_DECEMBER },
281 { NULL, 0 }
282 };
283
284 static struct lookup const wday_names[] = {
285 { "Sunday", TM_SUNDAY },
286 { "Monday", TM_MONDAY },
287 { "Tuesday", TM_TUESDAY },
288 { "Wednesday", TM_WEDNESDAY },
289 { "Thursday", TM_THURSDAY },
290 { "Friday", TM_FRIDAY },
291 { "Saturday", TM_SATURDAY },
292 { NULL, 0 }
293 };
294
295 static struct lookup const lasts[] = {
296 { "last-Sunday", TM_SUNDAY },
297 { "last-Monday", TM_MONDAY },
298 { "last-Tuesday", TM_TUESDAY },
299 { "last-Wednesday", TM_WEDNESDAY },
300 { "last-Thursday", TM_THURSDAY },
301 { "last-Friday", TM_FRIDAY },
302 { "last-Saturday", TM_SATURDAY },
303 { NULL, 0 }
304 };
305
306 static struct lookup const begin_years[] = {
307 { "minimum", YR_MINIMUM },
308 { "maximum", YR_MAXIMUM },
309 { NULL, 0 }
310 };
311
312 static struct lookup const end_years[] = {
313 { "minimum", YR_MINIMUM },
314 { "maximum", YR_MAXIMUM },
315 { "only", YR_ONLY },
316 { NULL, 0 }
317 };
318
319 static struct lookup const leap_types[] = {
320 { "Rolling", TRUE },
321 { "Stationary", FALSE },
322 { NULL, 0 }
323 };
324
325 static const int len_months[2][MONSPERYEAR] = {
326 { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 },
327 { 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }
328 };
329
330 static const int len_years[2] = {
331 DAYSPERNYEAR, DAYSPERLYEAR
332 };
333
334 static struct attype {
335 time_t at;
336 unsigned char type;
337 } attypes[TZ_MAX_TIMES];
338 static long gmtoffs[TZ_MAX_TYPES];
339 static char isdsts[TZ_MAX_TYPES];
340 static unsigned char abbrinds[TZ_MAX_TYPES];
341 static char ttisstds[TZ_MAX_TYPES];
342 static char ttisgmts[TZ_MAX_TYPES];
343 static char chars[TZ_MAX_CHARS];
344 static time_t trans[TZ_MAX_LEAPS];
345 static long corr[TZ_MAX_LEAPS];
346 static char roll[TZ_MAX_LEAPS];
347
348 /*
349 ** Memory allocation.
350 */
351
352 static char *
353 memcheck(ptr)
354 char * const ptr;
355 {
356 if (ptr == NULL) {
357 const char *e = strerror(errno);
358
359 (void) fprintf(stderr, _("%s: Memory exhausted: %s\n"),
360 progname, e);
361 (void) exit(EXIT_FAILURE);
362 }
363 return ptr;
364 }
365
366 #define emalloc(size) memcheck(imalloc(size))
367 #define erealloc(ptr, size) memcheck(irealloc((ptr), (size)))
368 #define ecpyalloc(ptr) memcheck(icpyalloc(ptr))
369 #define ecatalloc(oldp, newp) memcheck(icatalloc((oldp), (newp)))
370
371 /*
372 ** Error handling.
373 */
374
375 #if !(HAVE_STRERROR - 0)
376 static char *
377 strerror(errnum)
378 int errnum;
379 {
380 extern char * sys_errlist[];
381 extern int sys_nerr;
382
383 return (errnum > 0 && errnum <= sys_nerr) ?
384 sys_errlist[errnum] : "Unknown system error";
385 }
386 #endif /* !(HAVE_STRERROR - 0) */
387
388 static void
389 eats(name, num, rname, rnum)
390 const char * const name;
391 const int num;
392 const char * const rname;
393 const int rnum;
394 {
395 filename = name;
396 linenum = num;
397 rfilename = rname;
398 rlinenum = rnum;
399 }
400
401 static void
402 eat(name, num)
403 const char * const name;
404 const int num;
405 {
406 eats(name, num, (char *) NULL, -1);
407 }
408
409 static void
410 error(string)
411 const char * const string;
412 {
413 /*
414 ** Match the format of "cc" to allow sh users to
415 ** zic ... 2>&1 | error -t "*" -v
416 ** on BSD systems.
417 */
418 (void) fprintf(stderr, _("\"%s\", line %d: %s"),
419 filename, linenum, string);
420 if (rfilename != NULL)
421 (void) fprintf(stderr, _(" (rule from \"%s\", line %d)"),
422 rfilename, rlinenum);
423 (void) fprintf(stderr, "\n");
424 ++errors;
425 }
426
427 static void
428 warning(string)
429 const char * const string;
430 {
431 char * cp;
432
433 cp = ecpyalloc("warning: ");
434 cp = ecatalloc(cp, string);
435 error(cp);
436 ifree(cp);
437 --errors;
438 }
439
440 static void
441 usage P((void))
442 {
443 (void) fprintf(stderr, _("%s: usage is %s [ -s ] [ -v ] [ -l localtime ] [ -p posixrules ] [ -d directory ]\n\t[ -L leapseconds ] [ -y yearistype ] [ filename ... ]\n"),
444 progname, progname);
445 (void) exit(EXIT_FAILURE);
446 }
447
448 static const char * psxrules;
449 static const char * lcltime;
450 static const char * directory;
451 static const char * leapsec;
452 static const char * yitcommand;
453 static int sflag = FALSE;
454
455 int
456 main(argc, argv)
457 int argc;
458 char * argv[];
459 {
460 register int i;
461 register int j;
462 register int c;
463
464 #ifdef unix
465 (void) umask(umask(S_IWGRP | S_IWOTH) | (S_IWGRP | S_IWOTH));
466 #endif /* defined unix */
467 #if HAVE_GETTEXT - 0
468 (void) setlocale(LC_MESSAGES, "");
469 #ifdef TZ_DOMAINDIR
470 (void) bindtextdomain(TZ_DOMAIN, TZ_DOMAINDIR);
471 #endif /* defined TEXTDOMAINDIR */
472 (void) textdomain(TZ_DOMAIN);
473 #endif /* HAVE_GETTEXT - 0 */
474 progname = argv[0];
475 while ((c = getopt(argc, argv, "d:l:p:L:vsy:")) != EOF && c != -1)
476 switch (c) {
477 default:
478 usage();
479 case 'd':
480 if (directory == NULL)
481 directory = optarg;
482 else {
483 (void) fprintf(stderr,
484 _("%s: More than one -d option specified\n"),
485 progname);
486 (void) exit(EXIT_FAILURE);
487 }
488 break;
489 case 'l':
490 if (lcltime == NULL)
491 lcltime = optarg;
492 else {
493 (void) fprintf(stderr,
494 _("%s: More than one -l option specified\n"),
495 progname);
496 (void) exit(EXIT_FAILURE);
497 }
498 break;
499 case 'p':
500 if (psxrules == NULL)
501 psxrules = optarg;
502 else {
503 (void) fprintf(stderr,
504 _("%s: More than one -p option specified\n"),
505 progname);
506 (void) exit(EXIT_FAILURE);
507 }
508 break;
509 case 'y':
510 if (yitcommand == NULL)
511 yitcommand = optarg;
512 else {
513 (void) fprintf(stderr,
514 _("%s: More than one -y option specified\n"),
515 progname);
516 (void) exit(EXIT_FAILURE);
517 }
518 break;
519 case 'L':
520 if (leapsec == NULL)
521 leapsec = optarg;
522 else {
523 (void) fprintf(stderr,
524 _("%s: More than one -L option specified\n"),
525 progname);
526 (void) exit(EXIT_FAILURE);
527 }
528 break;
529 case 'v':
530 noise = TRUE;
531 break;
532 case 's':
533 sflag = TRUE;
534 break;
535 }
536 if (optind == argc - 1 && strcmp(argv[optind], "=") == 0)
537 usage(); /* usage message by request */
538 if (directory == NULL)
539 directory = TZDIR;
540 if (yitcommand == NULL)
541 yitcommand = "yearistype";
542
543 setboundaries();
544
545 if (optind < argc && leapsec != NULL) {
546 infile(leapsec);
547 adjleap();
548 }
549
550 for (i = optind; i < argc; ++i)
551 infile(argv[i]);
552 if (errors)
553 (void) exit(EXIT_FAILURE);
554 associate();
555 for (i = 0; i < nzones; i = j) {
556 /*
557 ** Find the next non-continuation zone entry.
558 */
559 for (j = i + 1; j < nzones && zones[j].z_name == NULL; ++j)
560 continue;
561 outzone(&zones[i], j - i);
562 }
563 /*
564 ** Make links.
565 */
566 for (i = 0; i < nlinks; ++i)
567 dolink(links[i].l_from, links[i].l_to);
568 if (lcltime != NULL)
569 dolink(lcltime, TZDEFAULT);
570 if (psxrules != NULL)
571 dolink(psxrules, TZDEFRULES);
572 return (errors == 0) ? EXIT_SUCCESS : EXIT_FAILURE;
573 }
574
575 static void
576 dolink(fromfile, tofile)
577 const char * const fromfile;
578 const char * const tofile;
579 {
580 register char * fromname;
581 register char * toname;
582
583 if (fromfile[0] == '/')
584 fromname = ecpyalloc(fromfile);
585 else {
586 fromname = ecpyalloc(directory);
587 fromname = ecatalloc(fromname, "/");
588 fromname = ecatalloc(fromname, fromfile);
589 }
590 if (tofile[0] == '/')
591 toname = ecpyalloc(tofile);
592 else {
593 toname = ecpyalloc(directory);
594 toname = ecatalloc(toname, "/");
595 toname = ecatalloc(toname, tofile);
596 }
597 /*
598 ** We get to be careful here since
599 ** there's a fair chance of root running us.
600 */
601 if (!itsdir(toname))
602 (void) remove(toname);
603 if (link(fromname, toname) != 0) {
604 int result;
605
606 if (mkdirs(toname) != 0)
607 (void) exit(EXIT_FAILURE);
608 result = link(fromname, toname);
609 #if (HAVE_SYMLINK - 0)
610 if (result != 0) {
611 result = symlink(fromname, toname);
612 if (result == 0)
613 warning(_("hard link failed, symbolic link used"));
614 }
615 #endif
616 if (result != 0) {
617 const char *e = strerror(errno);
618
619 (void) fprintf(stderr,
620 _("%s: Can't link from %s to %s: %s\n"),
621 progname, fromname, toname, e);
622 (void) exit(EXIT_FAILURE);
623 }
624 }
625 ifree(fromname);
626 ifree(toname);
627 }
628
629 #ifndef INT_MAX
630 #define INT_MAX ((int) (((unsigned)~0)>>1))
631 #endif /* !defined INT_MAX */
632
633 #ifndef INT_MIN
634 #define INT_MIN ((int) ~(((unsigned)~0)>>1))
635 #endif /* !defined INT_MIN */
636
637 /*
638 ** The tz file format currently allows at most 32-bit quantities.
639 ** This restriction should be removed before signed 32-bit values
640 ** wrap around in 2038, but unfortunately this will require a
641 ** change to the tz file format.
642 */
643
644 #define MAX_BITS_IN_FILE 32
645 #define TIME_T_BITS_IN_FILE ((TYPE_BIT(time_t) < MAX_BITS_IN_FILE) ? TYPE_BIT(time_t) : MAX_BITS_IN_FILE)
646
647 static void
648 setboundaries P((void))
649 {
650 if (TYPE_SIGNED(time_t)) {
651 min_time = ~ (time_t) 0;
652 min_time <<= TIME_T_BITS_IN_FILE - 1;
653 max_time = ~ (time_t) 0 - min_time;
654 if (sflag)
655 min_time = 0;
656 } else {
657 min_time = 0;
658 max_time = 2 - sflag;
659 max_time <<= TIME_T_BITS_IN_FILE - 1;
660 --max_time;
661 }
662 min_year = TM_YEAR_BASE + gmtime(&min_time)->tm_year;
663 max_year = TM_YEAR_BASE + gmtime(&max_time)->tm_year;
664 min_year_representable = min_year;
665 max_year_representable = max_year;
666 }
667
668 static int
669 itsdir(name)
670 const char * const name;
671 {
672 register char * myname;
673 register int accres;
674
675 myname = ecpyalloc(name);
676 myname = ecatalloc(myname, "/.");
677 accres = access(myname, F_OK);
678 ifree(myname);
679 return accres == 0;
680 }
681
682 /*
683 ** Associate sets of rules with zones.
684 */
685
686 /*
687 ** Sort by rule name.
688 */
689
690 static int
691 rcomp(cp1, cp2)
692 const void * cp1;
693 const void * cp2;
694 {
695 return strcmp(((const struct rule *) cp1)->r_name,
696 ((const struct rule *) cp2)->r_name);
697 }
698
699 static void
700 associate P((void))
701 {
702 register struct zone * zp;
703 register struct rule * rp;
704 register int base, out;
705 register int i, j;
706
707 if (nrules != 0) {
708 (void) qsort((void *) rules, (size_t) nrules,
709 (size_t) sizeof *rules, rcomp);
710 for (i = 0; i < nrules - 1; ++i) {
711 if (strcmp(rules[i].r_name,
712 rules[i + 1].r_name) != 0)
713 continue;
714 if (strcmp(rules[i].r_filename,
715 rules[i + 1].r_filename) == 0)
716 continue;
717 eat(rules[i].r_filename, rules[i].r_linenum);
718 warning(_("same rule name in multiple files"));
719 eat(rules[i + 1].r_filename, rules[i + 1].r_linenum);
720 warning(_("same rule name in multiple files"));
721 for (j = i + 2; j < nrules; ++j) {
722 if (strcmp(rules[i].r_name,
723 rules[j].r_name) != 0)
724 break;
725 if (strcmp(rules[i].r_filename,
726 rules[j].r_filename) == 0)
727 continue;
728 if (strcmp(rules[i + 1].r_filename,
729 rules[j].r_filename) == 0)
730 continue;
731 break;
732 }
733 i = j - 1;
734 }
735 }
736 for (i = 0; i < nzones; ++i) {
737 zp = &zones[i];
738 zp->z_rules = NULL;
739 zp->z_nrules = 0;
740 }
741 for (base = 0; base < nrules; base = out) {
742 rp = &rules[base];
743 for (out = base + 1; out < nrules; ++out)
744 if (strcmp(rp->r_name, rules[out].r_name) != 0)
745 break;
746 for (i = 0; i < nzones; ++i) {
747 zp = &zones[i];
748 if (strcmp(zp->z_rule, rp->r_name) != 0)
749 continue;
750 zp->z_rules = rp;
751 zp->z_nrules = out - base;
752 }
753 }
754 for (i = 0; i < nzones; ++i) {
755 zp = &zones[i];
756 if (zp->z_nrules == 0) {
757 /*
758 ** Maybe we have a local standard time offset.
759 */
760 eat(zp->z_filename, zp->z_linenum);
761 zp->z_stdoff = gethms(zp->z_rule, _("unruly zone"),
762 TRUE);
763 /*
764 ** Note, though, that if there's no rule,
765 ** a '%s' in the format is a bad thing.
766 */
767 if (strchr(zp->z_format, '%') != 0)
768 error(_("%s in ruleless zone"));
769 }
770 }
771 if (errors)
772 (void) exit(EXIT_FAILURE);
773 }
774
775 static void
776 infile(name)
777 const char * name;
778 {
779 register FILE * fp;
780 register char ** fields;
781 register char * cp;
782 register const struct lookup * lp;
783 register int nfields;
784 register int wantcont;
785 register int num;
786 char buf[BUFSIZ];
787
788 if (strcmp(name, "-") == 0) {
789 name = _("standard input");
790 fp = stdin;
791 } else if ((fp = fopen(name, "r")) == NULL) {
792 const char *e = strerror(errno);
793
794 (void) fprintf(stderr, _("%s: Can't open %s: %s\n"),
795 progname, name, e);
796 (void) exit(EXIT_FAILURE);
797 }
798 wantcont = FALSE;
799 for (num = 1; ; ++num) {
800 eat(name, num);
801 if (fgets(buf, (int) sizeof buf, fp) != buf)
802 break;
803 cp = strchr(buf, '\n');
804 if (cp == NULL) {
805 error(_("line too long"));
806 (void) exit(EXIT_FAILURE);
807 }
808 *cp = '\0';
809 fields = getfields(buf);
810 nfields = 0;
811 while (fields[nfields] != NULL) {
812 static char nada;
813
814 if (strcmp(fields[nfields], "-") == 0)
815 fields[nfields] = &nada;
816 ++nfields;
817 }
818 if (nfields == 0) {
819 /* nothing to do */
820 } else if (wantcont) {
821 wantcont = inzcont(fields, nfields);
822 } else {
823 lp = byword(fields[0], line_codes);
824 if (lp == NULL)
825 error(_("input line of unknown type"));
826 else switch ((int) (lp->l_value)) {
827 case LC_RULE:
828 inrule(fields, nfields);
829 wantcont = FALSE;
830 break;
831 case LC_ZONE:
832 wantcont = inzone(fields, nfields);
833 break;
834 case LC_LINK:
835 inlink(fields, nfields);
836 wantcont = FALSE;
837 break;
838 case LC_LEAP:
839 if (name != leapsec)
840 (void) fprintf(stderr,
841 _("%s: Leap line in non leap seconds file %s\n"),
842 progname, name);
843 else inleap(fields, nfields);
844 wantcont = FALSE;
845 break;
846 default: /* "cannot happen" */
847 (void) fprintf(stderr,
848 _("%s: panic: Invalid l_value %d\n"),
849 progname, lp->l_value);
850 (void) exit(EXIT_FAILURE);
851 }
852 }
853 ifree((char *) fields);
854 }
855 if (ferror(fp)) {
856 (void) fprintf(stderr, _("%s: Error reading %s\n"),
857 progname, filename);
858 (void) exit(EXIT_FAILURE);
859 }
860 if (fp != stdin && fclose(fp)) {
861 const char *e = strerror(errno);
862
863 (void) fprintf(stderr, _("%s: Error closing %s: %s\n"),
864 progname, filename, e);
865 (void) exit(EXIT_FAILURE);
866 }
867 if (wantcont)
868 error(_("expected continuation line not found"));
869 }
870
871 /*
872 ** Convert a string of one of the forms
873 ** h -h hh:mm -hh:mm hh:mm:ss -hh:mm:ss
874 ** into a number of seconds.
875 ** A null string maps to zero.
876 ** Call error with errstring and return zero on errors.
877 */
878
879 static long
880 gethms(string, errstring, signable)
881 const char * string;
882 const char * const errstring;
883 const int signable;
884 {
885 int hh, mm, ss, sign;
886
887 if (string == NULL || *string == '\0')
888 return 0;
889 if (!signable)
890 sign = 1;
891 else if (*string == '-') {
892 sign = -1;
893 ++string;
894 } else sign = 1;
895 if (sscanf(string, scheck(string, "%d"), &hh) == 1)
896 mm = ss = 0;
897 else if (sscanf(string, scheck(string, "%d:%d"), &hh, &mm) == 2)
898 ss = 0;
899 else if (sscanf(string, scheck(string, "%d:%d:%d"),
900 &hh, &mm, &ss) != 3) {
901 error(errstring);
902 return 0;
903 }
904 if (hh < 0 || hh >= HOURSPERDAY ||
905 mm < 0 || mm >= MINSPERHOUR ||
906 ss < 0 || ss > SECSPERMIN) {
907 error(errstring);
908 return 0;
909 }
910 return eitol(sign) *
911 (eitol(hh * MINSPERHOUR + mm) *
912 eitol(SECSPERMIN) + eitol(ss));
913 }
914
915 static void
916 inrule(fields, nfields)
917 register char ** const fields;
918 const int nfields;
919 {
920 static struct rule r;
921
922 if (nfields != RULE_FIELDS) {
923 error(_("wrong number of fields on Rule line"));
924 return;
925 }
926 if (*fields[RF_NAME] == '\0') {
927 error(_("nameless rule"));
928 return;
929 }
930 r.r_filename = filename;
931 r.r_linenum = linenum;
932 r.r_stdoff = gethms(fields[RF_STDOFF], _("invalid saved time"), TRUE);
933 rulesub(&r, fields[RF_LOYEAR], fields[RF_HIYEAR], fields[RF_COMMAND],
934 fields[RF_MONTH], fields[RF_DAY], fields[RF_TOD]);
935 r.r_name = ecpyalloc(fields[RF_NAME]);
936 r.r_abbrvar = ecpyalloc(fields[RF_ABBRVAR]);
937 rules = (struct rule *) (void *) erealloc((char *) rules,
938 (int) ((nrules + 1) * sizeof *rules));
939 rules[nrules++] = r;
940 }
941
942 static int
943 inzone(fields, nfields)
944 register char ** const fields;
945 const int nfields;
946 {
947 register int i;
948 static char * buf;
949
950 if (nfields < ZONE_MINFIELDS || nfields > ZONE_MAXFIELDS) {
951 error(_("wrong number of fields on Zone line"));
952 return FALSE;
953 }
954 if (strcmp(fields[ZF_NAME], TZDEFAULT) == 0 && lcltime != NULL) {
955 buf = erealloc(buf, (int) (132 + strlen(TZDEFAULT)));
956 (void) sprintf(buf,
957 _("\"Zone %s\" line and -l option are mutually exclusive"),
958 TZDEFAULT);
959 error(buf);
960 return FALSE;
961 }
962 if (strcmp(fields[ZF_NAME], TZDEFRULES) == 0 && psxrules != NULL) {
963 buf = erealloc(buf, (int) (132 + strlen(TZDEFRULES)));
964 (void) sprintf(buf,
965 _("\"Zone %s\" line and -p option are mutually exclusive"),
966 TZDEFRULES);
967 error(buf);
968 return FALSE;
969 }
970 for (i = 0; i < nzones; ++i)
971 if (zones[i].z_name != NULL &&
972 strcmp(zones[i].z_name, fields[ZF_NAME]) == 0) {
973 buf = erealloc(buf, (int) (132 +
974 strlen(fields[ZF_NAME]) +
975 strlen(zones[i].z_filename)));
976 (void) sprintf(buf,
977 _("duplicate zone name %s (file \"%s\", line %d)"),
978 fields[ZF_NAME],
979 zones[i].z_filename,
980 zones[i].z_linenum);
981 error(buf);
982 return FALSE;
983 }
984 return inzsub(fields, nfields, FALSE);
985 }
986
987 static int
988 inzcont(fields, nfields)
989 register char ** const fields;
990 const int nfields;
991 {
992 if (nfields < ZONEC_MINFIELDS || nfields > ZONEC_MAXFIELDS) {
993 error(_("wrong number of fields on Zone continuation line"));
994 return FALSE;
995 }
996 return inzsub(fields, nfields, TRUE);
997 }
998
999 static int
1000 inzsub(fields, nfields, iscont)
1001 register char ** const fields;
1002 const int nfields;
1003 const int iscont;
1004 {
1005 register char * cp;
1006 static struct zone z;
1007 register int i_gmtoff, i_rule, i_format;
1008 register int i_untilyear, i_untilmonth;
1009 register int i_untilday, i_untiltime;
1010 register int hasuntil;
1011
1012 if (iscont) {
1013 i_gmtoff = ZFC_GMTOFF;
1014 i_rule = ZFC_RULE;
1015 i_format = ZFC_FORMAT;
1016 i_untilyear = ZFC_TILYEAR;
1017 i_untilmonth = ZFC_TILMONTH;
1018 i_untilday = ZFC_TILDAY;
1019 i_untiltime = ZFC_TILTIME;
1020 z.z_name = NULL;
1021 } else {
1022 i_gmtoff = ZF_GMTOFF;
1023 i_rule = ZF_RULE;
1024 i_format = ZF_FORMAT;
1025 i_untilyear = ZF_TILYEAR;
1026 i_untilmonth = ZF_TILMONTH;
1027 i_untilday = ZF_TILDAY;
1028 i_untiltime = ZF_TILTIME;
1029 z.z_name = ecpyalloc(fields[ZF_NAME]);
1030 }
1031 z.z_filename = filename;
1032 z.z_linenum = linenum;
1033 z.z_gmtoff = gethms(fields[i_gmtoff], _("invalid UTC offset"), TRUE);
1034 if ((cp = strchr(fields[i_format], '%')) != 0) {
1035 if (*++cp != 's' || strchr(cp, '%') != 0) {
1036 error(_("invalid abbreviation format"));
1037 return FALSE;
1038 }
1039 }
1040 z.z_rule = ecpyalloc(fields[i_rule]);
1041 z.z_format = ecpyalloc(fields[i_format]);
1042 hasuntil = nfields > i_untilyear;
1043 if (hasuntil) {
1044 z.z_untilrule.r_filename = filename;
1045 z.z_untilrule.r_linenum = linenum;
1046 rulesub(&z.z_untilrule,
1047 fields[i_untilyear],
1048 "only",
1049 "",
1050 (nfields > i_untilmonth) ?
1051 fields[i_untilmonth] : "Jan",
1052 (nfields > i_untilday) ? fields[i_untilday] : "1",
1053 (nfields > i_untiltime) ? fields[i_untiltime] : "0");
1054 z.z_untiltime = rpytime(&z.z_untilrule,
1055 z.z_untilrule.r_loyear);
1056 if (iscont && nzones > 0 &&
1057 z.z_untiltime > min_time &&
1058 z.z_untiltime < max_time &&
1059 zones[nzones - 1].z_untiltime > min_time &&
1060 zones[nzones - 1].z_untiltime < max_time &&
1061 zones[nzones - 1].z_untiltime >= z.z_untiltime) {
1062 error(_("Zone continuation line end time is not after end time of previous line"));
1063 return FALSE;
1064 }
1065 }
1066 zones = (struct zone *) (void *) erealloc((char *) zones,
1067 (int) ((nzones + 1) * sizeof *zones));
1068 zones[nzones++] = z;
1069 /*
1070 ** If there was an UNTIL field on this line,
1071 ** there's more information about the zone on the next line.
1072 */
1073 return hasuntil;
1074 }
1075
1076 static void
1077 inleap(fields, nfields)
1078 register char ** const fields;
1079 const int nfields;
1080 {
1081 register const char * cp;
1082 register const struct lookup * lp;
1083 register int i, j;
1084 int year, month, day;
1085 long dayoff, tod;
1086 time_t t;
1087
1088 if (nfields != LEAP_FIELDS) {
1089 error(_("wrong number of fields on Leap line"));
1090 return;
1091 }
1092 dayoff = 0;
1093 cp = fields[LP_YEAR];
1094 if (sscanf(cp, scheck(cp, "%d"), &year) != 1) {
1095 /*
1096 * Leapin' Lizards!
1097 */
1098 error(_("invalid leaping year"));
1099 return;
1100 }
1101 j = EPOCH_YEAR;
1102 while (j != year) {
1103 if (year > j) {
1104 i = len_years[isleap(j)];
1105 ++j;
1106 } else {
1107 --j;
1108 i = -len_years[isleap(j)];
1109 }
1110 dayoff = oadd(dayoff, eitol(i));
1111 }
1112 if ((lp = byword(fields[LP_MONTH], mon_names)) == NULL) {
1113 error(_("invalid month name"));
1114 return;
1115 }
1116 month = lp->l_value;
1117 j = TM_JANUARY;
1118 while (j != month) {
1119 i = len_months[isleap(year)][j];
1120 dayoff = oadd(dayoff, eitol(i));
1121 ++j;
1122 }
1123 cp = fields[LP_DAY];
1124 if (sscanf(cp, scheck(cp, "%d"), &day) != 1 ||
1125 day <= 0 || day > len_months[isleap(year)][month]) {
1126 error(_("invalid day of month"));
1127 return;
1128 }
1129 dayoff = oadd(dayoff, eitol(day - 1));
1130 if (dayoff < 0 && !TYPE_SIGNED(time_t)) {
1131 error(_("time before zero"));
1132 return;
1133 }
1134 t = (time_t) dayoff * SECSPERDAY;
1135 /*
1136 ** Cheap overflow check.
1137 */
1138 if (t / SECSPERDAY != dayoff) {
1139 error(_("time overflow"));
1140 return;
1141 }
1142 tod = gethms(fields[LP_TIME], _("invalid time of day"), FALSE);
1143 cp = fields[LP_CORR];
1144 {
1145 register int positive;
1146 int count;
1147
1148 if (strcmp(cp, "") == 0) { /* infile() turns "-" into "" */
1149 positive = FALSE;
1150 count = 1;
1151 } else if (strcmp(cp, "--") == 0) {
1152 positive = FALSE;
1153 count = 2;
1154 } else if (strcmp(cp, "+") == 0) {
1155 positive = TRUE;
1156 count = 1;
1157 } else if (strcmp(cp, "++") == 0) {
1158 positive = TRUE;
1159 count = 2;
1160 } else {
1161 error(_("illegal CORRECTION field on Leap line"));
1162 return;
1163 }
1164 if ((lp = byword(fields[LP_ROLL], leap_types)) == NULL) {
1165 error(_("illegal Rolling/Stationary field on Leap line"));
1166 return;
1167 }
1168 leapadd(tadd(t, tod), positive, lp->l_value, count);
1169 }
1170 }
1171
1172 static void
1173 inlink(fields, nfields)
1174 register char ** const fields;
1175 const int nfields;
1176 {
1177 struct link l;
1178
1179 if (nfields != LINK_FIELDS) {
1180 error(_("wrong number of fields on Link line"));
1181 return;
1182 }
1183 if (*fields[LF_FROM] == '\0') {
1184 error(_("blank FROM field on Link line"));
1185 return;
1186 }
1187 if (*fields[LF_TO] == '\0') {
1188 error(_("blank TO field on Link line"));
1189 return;
1190 }
1191 l.l_filename = filename;
1192 l.l_linenum = linenum;
1193 l.l_from = ecpyalloc(fields[LF_FROM]);
1194 l.l_to = ecpyalloc(fields[LF_TO]);
1195 links = (struct link *) (void *) erealloc((char *) links,
1196 (int) ((nlinks + 1) * sizeof *links));
1197 links[nlinks++] = l;
1198 }
1199
1200 static void
1201 rulesub(rp, loyearp, hiyearp, typep, monthp, dayp, timep)
1202 register struct rule * const rp;
1203 const char * const loyearp;
1204 const char * const hiyearp;
1205 const char * const typep;
1206 const char * const monthp;
1207 const char * const dayp;
1208 const char * const timep;
1209 {
1210 register const struct lookup * lp;
1211 register const char * cp;
1212 register char * dp;
1213 register char * ep;
1214
1215 if ((lp = byword(monthp, mon_names)) == NULL) {
1216 error(_("invalid month name"));
1217 return;
1218 }
1219 rp->r_month = lp->l_value;
1220 rp->r_todisstd = FALSE;
1221 rp->r_todisgmt = FALSE;
1222 dp = ecpyalloc(timep);
1223 if (*dp != '\0') {
1224 ep = dp + strlen(dp) - 1;
1225 switch (lowerit(*ep)) {
1226 case 's': /* Standard */
1227 rp->r_todisstd = TRUE;
1228 rp->r_todisgmt = FALSE;
1229 *ep = '\0';
1230 break;
1231 case 'w': /* Wall */
1232 rp->r_todisstd = FALSE;
1233 rp->r_todisgmt = FALSE;
1234 *ep = '\0';
1235 break;
1236 case 'g': /* Greenwich */
1237 case 'u': /* Universal */
1238 case 'z': /* Zulu */
1239 rp->r_todisstd = TRUE;
1240 rp->r_todisgmt = TRUE;
1241 *ep = '\0';
1242 break;
1243 }
1244 }
1245 rp->r_tod = gethms(dp, _("invalid time of day"), FALSE);
1246 ifree(dp);
1247 /*
1248 ** Year work.
1249 */
1250 cp = loyearp;
1251 lp = byword(cp, begin_years);
1252 if (lp != NULL) switch ((int) lp->l_value) {
1253 case YR_MINIMUM:
1254 rp->r_loyear = INT_MIN;
1255 break;
1256 case YR_MAXIMUM:
1257 rp->r_loyear = INT_MAX;
1258 break;
1259 default: /* "cannot happen" */
1260 (void) fprintf(stderr,
1261 _("%s: panic: Invalid l_value %d\n"),
1262 progname, lp->l_value);
1263 (void) exit(EXIT_FAILURE);
1264 } else if (sscanf(cp, scheck(cp, "%d"), &rp->r_loyear) != 1) {
1265 error(_("invalid starting year"));
1266 return;
1267 } else if (noise) {
1268 if (rp->r_loyear < min_year_representable)
1269 warning(_("starting year too low to be represented"));
1270 else if (rp->r_loyear > max_year_representable)
1271 warning(_("starting year too high to be represented"));
1272 }
1273 cp = hiyearp;
1274 if ((lp = byword(cp, end_years)) != NULL) switch ((int) lp->l_value) {
1275 case YR_MINIMUM:
1276 rp->r_hiyear = INT_MIN;
1277 break;
1278 case YR_MAXIMUM:
1279 rp->r_hiyear = INT_MAX;
1280 break;
1281 case YR_ONLY:
1282 rp->r_hiyear = rp->r_loyear;
1283 break;
1284 default: /* "cannot happen" */
1285 (void) fprintf(stderr,
1286 _("%s: panic: Invalid l_value %d\n"),
1287 progname, lp->l_value);
1288 (void) exit(EXIT_FAILURE);
1289 } else if (sscanf(cp, scheck(cp, "%d"), &rp->r_hiyear) != 1) {
1290 error(_("invalid ending year"));
1291 return;
1292 } else if (noise) {
1293 if (rp->r_loyear < min_year_representable)
1294 warning(_("starting year too low to be represented"));
1295 else if (rp->r_loyear > max_year_representable)
1296 warning(_("starting year too high to be represented"));
1297 }
1298 if (rp->r_loyear > rp->r_hiyear) {
1299 error(_("starting year greater than ending year"));
1300 return;
1301 }
1302 if (*typep == '\0')
1303 rp->r_yrtype = NULL;
1304 else {
1305 if (rp->r_loyear == rp->r_hiyear) {
1306 error(_("typed single year"));
1307 return;
1308 }
1309 rp->r_yrtype = ecpyalloc(typep);
1310 }
1311 if (rp->r_loyear < min_year && rp->r_loyear > 0)
1312 min_year = rp->r_loyear;
1313 /*
1314 ** Day work.
1315 ** Accept things such as:
1316 ** 1
1317 ** last-Sunday
1318 ** Sun<=20
1319 ** Sun>=7
1320 */
1321 dp = ecpyalloc(dayp);
1322 if ((lp = byword(dp, lasts)) != NULL) {
1323 rp->r_dycode = DC_DOWLEQ;
1324 rp->r_wday = lp->l_value;
1325 rp->r_dayofmonth = len_months[1][rp->r_month];
1326 } else {
1327 if ((ep = strchr(dp, '<')) != 0)
1328 rp->r_dycode = DC_DOWLEQ;
1329 else if ((ep = strchr(dp, '>')) != 0)
1330 rp->r_dycode = DC_DOWGEQ;
1331 else {
1332 ep = dp;
1333 rp->r_dycode = DC_DOM;
1334 }
1335 if (rp->r_dycode != DC_DOM) {
1336 *ep++ = 0;
1337 if (*ep++ != '=') {
1338 error(_("invalid day of month"));
1339 ifree(dp);
1340 return;
1341 }
1342 if ((lp = byword(dp, wday_names)) == NULL) {
1343 error(_("invalid weekday name"));
1344 ifree(dp);
1345 return;
1346 }
1347 rp->r_wday = lp->l_value;
1348 }
1349 if (sscanf(ep, scheck(ep, "%d"), &rp->r_dayofmonth) != 1 ||
1350 rp->r_dayofmonth <= 0 ||
1351 (rp->r_dayofmonth > len_months[1][rp->r_month])) {
1352 error(_("invalid day of month"));
1353 ifree(dp);
1354 return;
1355 }
1356 }
1357 ifree(dp);
1358 }
1359
1360 static void
1361 convert(val, buf)
1362 const long val;
1363 char * const buf;
1364 {
1365 register int i;
1366 register long shift;
1367
1368 for (i = 0, shift = 24; i < 4; ++i, shift -= 8)
1369 buf[i] = val >> shift;
1370 }
1371
1372 static void
1373 puttzcode(val, fp)
1374 const long val;
1375 FILE * const fp;
1376 {
1377 char buf[4];
1378
1379 convert(val, buf);
1380 (void) fwrite((void *) buf, (size_t) sizeof buf, (size_t) 1, fp);
1381 }
1382
1383 static int
1384 atcomp(avp, bvp)
1385 void * avp;
1386 void * bvp;
1387 {
1388 if (((struct attype *) avp)->at < ((struct attype *) bvp)->at)
1389 return -1;
1390 else if (((struct attype *) avp)->at > ((struct attype *) bvp)->at)
1391 return 1;
1392 else return 0;
1393 }
1394
1395 static void
1396 writezone(name)
1397 const char * const name;
1398 {
1399 register FILE * fp;
1400 register int i, j;
1401 static char * fullname;
1402 static struct tzhead tzh;
1403 time_t ats[TZ_MAX_TIMES];
1404 unsigned char types[TZ_MAX_TIMES];
1405
1406 /*
1407 ** Sort.
1408 */
1409 if (timecnt > 1)
1410 (void) qsort((void *) attypes, (size_t) timecnt,
1411 (size_t) sizeof *attypes, atcomp);
1412 /*
1413 ** Optimize.
1414 */
1415 {
1416 int fromi;
1417 int toi;
1418
1419 toi = 0;
1420 fromi = 0;
1421 while (fromi < timecnt && attypes[fromi].at < min_time)
1422 ++fromi;
1423 if (isdsts[0] == 0)
1424 while (fromi < timecnt && attypes[fromi].type == 0)
1425 ++fromi; /* handled by default rule */
1426 for ( ; fromi < timecnt; ++fromi) {
1427 if (toi != 0
1428 && ((attypes[fromi].at
1429 + gmtoffs[attypes[toi - 1].type])
1430 <= (attypes[toi - 1].at
1431 + gmtoffs[toi == 1 ? 0
1432 : attypes[toi - 2].type]))) {
1433 attypes[toi - 1].type = attypes[fromi].type;
1434 continue;
1435 }
1436 if (toi == 0 ||
1437 attypes[toi - 1].type != attypes[fromi].type)
1438 attypes[toi++] = attypes[fromi];
1439 }
1440 timecnt = toi;
1441 }
1442 /*
1443 ** Transfer.
1444 */
1445 for (i = 0; i < timecnt; ++i) {
1446 ats[i] = attypes[i].at;
1447 types[i] = attypes[i].type;
1448 }
1449 fullname = erealloc(fullname,
1450 (int) (strlen(directory) + 1 + strlen(name) + 1));
1451 (void) sprintf(fullname, "%s/%s", directory, name);
1452 /*
1453 ** Remove old file, if any, to snap links.
1454 */
1455 if (!itsdir(fullname) && remove(fullname) != 0 && errno != ENOENT) {
1456 const char *e = strerror(errno);
1457
1458 (void) fprintf(stderr, _("%s: Can't remove %s: %s\n"),
1459 progname, fullname, e);
1460 (void) exit(EXIT_FAILURE);
1461 }
1462 if ((fp = fopen(fullname, "wb")) == NULL) {
1463 if (mkdirs(fullname) != 0)
1464 (void) exit(EXIT_FAILURE);
1465 if ((fp = fopen(fullname, "wb")) == NULL) {
1466 const char *e = strerror(errno);
1467
1468 (void) fprintf(stderr, _("%s: Can't create %s: %s\n"),
1469 progname, fullname, e);
1470 (void) exit(EXIT_FAILURE);
1471 }
1472 }
1473 convert(eitol(typecnt), tzh.tzh_ttisgmtcnt);
1474 convert(eitol(typecnt), tzh.tzh_ttisstdcnt);
1475 convert(eitol(leapcnt), tzh.tzh_leapcnt);
1476 convert(eitol(timecnt), tzh.tzh_timecnt);
1477 convert(eitol(typecnt), tzh.tzh_typecnt);
1478 convert(eitol(charcnt), tzh.tzh_charcnt);
1479 (void) strncpy(tzh.tzh_magic, TZ_MAGIC, sizeof tzh.tzh_magic);
1480 #define DO(field) (void) fwrite((void *) tzh.field, (size_t) sizeof tzh.field, (size_t) 1, fp)
1481 DO(tzh_magic);
1482 DO(tzh_reserved);
1483 DO(tzh_ttisgmtcnt);
1484 DO(tzh_ttisstdcnt);
1485 DO(tzh_leapcnt);
1486 DO(tzh_timecnt);
1487 DO(tzh_typecnt);
1488 DO(tzh_charcnt);
1489 #undef DO
1490 for (i = 0; i < timecnt; ++i) {
1491 j = leapcnt;
1492 while (--j >= 0)
1493 if (ats[i] >= trans[j]) {
1494 ats[i] = tadd(ats[i], corr[j]);
1495 break;
1496 }
1497 puttzcode((long) ats[i], fp);
1498 }
1499 if (timecnt > 0)
1500 (void) fwrite((void *) types, (size_t) sizeof types[0],
1501 (size_t) timecnt, fp);
1502 for (i = 0; i < typecnt; ++i) {
1503 puttzcode((long) gmtoffs[i], fp);
1504 (void) putc(isdsts[i], fp);
1505 (void) putc(abbrinds[i], fp);
1506 }
1507 if (charcnt != 0)
1508 (void) fwrite((void *) chars, (size_t) sizeof chars[0],
1509 (size_t) charcnt, fp);
1510 for (i = 0; i < leapcnt; ++i) {
1511 if (roll[i]) {
1512 if (timecnt == 0 || trans[i] < ats[0]) {
1513 j = 0;
1514 while (isdsts[j])
1515 if (++j >= typecnt) {
1516 j = 0;
1517 break;
1518 }
1519 } else {
1520 j = 1;
1521 while (j < timecnt && trans[i] >= ats[j])
1522 ++j;
1523 j = types[j - 1];
1524 }
1525 puttzcode((long) tadd(trans[i], -gmtoffs[j]), fp);
1526 } else puttzcode((long) trans[i], fp);
1527 puttzcode((long) corr[i], fp);
1528 }
1529 for (i = 0; i < typecnt; ++i)
1530 (void) putc(ttisstds[i], fp);
1531 for (i = 0; i < typecnt; ++i)
1532 (void) putc(ttisgmts[i], fp);
1533 if (ferror(fp) || fclose(fp)) {
1534 (void) fprintf(stderr, _("%s: Error writing %s\n"),
1535 progname, fullname);
1536 (void) exit(EXIT_FAILURE);
1537 }
1538 }
1539
1540 static void
1541 doabbr(abbr, format, letters, isdst)
1542 char * const abbr;
1543 const char * const format;
1544 const char * const letters;
1545 const int isdst;
1546 {
1547 if (strchr(format, '/') == NULL) {
1548 if (letters == NULL)
1549 (void) strcpy(abbr, format);
1550 else (void) sprintf(abbr, format, letters);
1551 } else if (isdst)
1552 (void) strcpy(abbr, strchr(format, '/') + 1);
1553 else {
1554 (void) strcpy(abbr, format);
1555 *strchr(abbr, '/') = '\0';
1556 }
1557 }
1558
1559 static void
1560 outzone(zpfirst, zonecount)
1561 const struct zone * const zpfirst;
1562 const int zonecount;
1563 {
1564 register const struct zone * zp;
1565 register struct rule * rp;
1566 register int i, j;
1567 register int usestart, useuntil;
1568 register time_t starttime, untiltime;
1569 register long gmtoff;
1570 register long stdoff;
1571 register int year;
1572 register long startoff;
1573 register int startttisstd;
1574 register int startttisgmt;
1575 register int type;
1576 char startbuf[BUFSIZ];
1577
1578 INITIALIZE(untiltime);
1579 INITIALIZE(starttime);
1580 /*
1581 ** Now. . .finally. . .generate some useful data!
1582 */
1583 timecnt = 0;
1584 typecnt = 0;
1585 charcnt = 0;
1586 /*
1587 ** A guess that may well be corrected later.
1588 */
1589 stdoff = 0;
1590 /*
1591 ** Thanks to Earl Chew (earl@dnd.icp.nec.com.au)
1592 ** for noting the need to unconditionally initialize startttisstd.
1593 */
1594 startttisstd = FALSE;
1595 startttisgmt = FALSE;
1596 for (i = 0; i < zonecount; ++i) {
1597 zp = &zpfirst[i];
1598 usestart = i > 0 && (zp - 1)->z_untiltime > min_time;
1599 useuntil = i < (zonecount - 1);
1600 if (useuntil && zp->z_untiltime <= min_time)
1601 continue;
1602 gmtoff = zp->z_gmtoff;
1603 eat(zp->z_filename, zp->z_linenum);
1604 *startbuf = '\0';
1605 startoff = zp->z_gmtoff;
1606 if (zp->z_nrules == 0) {
1607 stdoff = zp->z_stdoff;
1608 doabbr(startbuf, zp->z_format,
1609 (char *) NULL, stdoff != 0);
1610 type = addtype(oadd(zp->z_gmtoff, stdoff),
1611 startbuf, stdoff != 0, startttisstd,
1612 startttisgmt);
1613 if (usestart) {
1614 addtt(starttime, type);
1615 usestart = FALSE;
1616 }
1617 else if (stdoff != 0)
1618 addtt(min_time, type);
1619 } else for (year = min_year; year <= max_year; ++year) {
1620 if (useuntil && year > zp->z_untilrule.r_hiyear)
1621 break;
1622 /*
1623 ** Mark which rules to do in the current year.
1624 ** For those to do, calculate rpytime(rp, year);
1625 */
1626 for (j = 0; j < zp->z_nrules; ++j) {
1627 rp = &zp->z_rules[j];
1628 eats(zp->z_filename, zp->z_linenum,
1629 rp->r_filename, rp->r_linenum);
1630 rp->r_todo = year >= rp->r_loyear &&
1631 year <= rp->r_hiyear &&
1632 yearistype(year, rp->r_yrtype);
1633 if (rp->r_todo)
1634 rp->r_temp = rpytime(rp, year);
1635 }
1636 for ( ; ; ) {
1637 register int k;
1638 register time_t jtime, ktime;
1639 register long offset;
1640 char buf[BUFSIZ];
1641
1642 INITIALIZE(ktime);
1643 if (useuntil) {
1644 /*
1645 ** Turn untiltime into UTC
1646 ** assuming the current gmtoff and
1647 ** stdoff values.
1648 */
1649 untiltime = zp->z_untiltime;
1650 if (!zp->z_untilrule.r_todisgmt)
1651 untiltime = tadd(untiltime,
1652 -gmtoff);
1653 if (!zp->z_untilrule.r_todisstd)
1654 untiltime = tadd(untiltime,
1655 -stdoff);
1656 }
1657 /*
1658 ** Find the rule (of those to do, if any)
1659 ** that takes effect earliest in the year.
1660 */
1661 k = -1;
1662 for (j = 0; j < zp->z_nrules; ++j) {
1663 rp = &zp->z_rules[j];
1664 if (!rp->r_todo)
1665 continue;
1666 eats(zp->z_filename, zp->z_linenum,
1667 rp->r_filename, rp->r_linenum);
1668 offset = rp->r_todisgmt ? 0 : gmtoff;
1669 if (!rp->r_todisstd)
1670 offset = oadd(offset, stdoff);
1671 jtime = rp->r_temp;
1672 if (jtime == min_time ||
1673 jtime == max_time)
1674 continue;
1675 jtime = tadd(jtime, -offset);
1676 if (k < 0 || jtime < ktime) {
1677 k = j;
1678 ktime = jtime;
1679 }
1680 }
1681 if (k < 0)
1682 break; /* go on to next year */
1683 rp = &zp->z_rules[k];
1684 rp->r_todo = FALSE;
1685 if (useuntil && ktime >= untiltime)
1686 break;
1687 stdoff = rp->r_stdoff;
1688 if (usestart && ktime == starttime)
1689 usestart = FALSE;
1690 if (usestart) {
1691 if (ktime < starttime) {
1692 startoff = oadd(zp->z_gmtoff,
1693 stdoff);
1694 doabbr(startbuf, zp->z_format,
1695 rp->r_abbrvar,
1696 rp->r_stdoff != 0);
1697 continue;
1698 }
1699 if (*startbuf == '\0' &&
1700 startoff == oadd(zp->z_gmtoff,
1701 stdoff)) {
1702 doabbr(startbuf, zp->z_format,
1703 rp->r_abbrvar,
1704 rp->r_stdoff != 0);
1705 }
1706 }
1707 eats(zp->z_filename, zp->z_linenum,
1708 rp->r_filename, rp->r_linenum);
1709 doabbr(buf, zp->z_format, rp->r_abbrvar,
1710 rp->r_stdoff != 0);
1711 offset = oadd(zp->z_gmtoff, rp->r_stdoff);
1712 type = addtype(offset, buf, rp->r_stdoff != 0,
1713 rp->r_todisstd, rp->r_todisgmt);
1714 addtt(ktime, type);
1715 }
1716 }
1717 if (usestart) {
1718 if (*startbuf == '\0' &&
1719 zp->z_format != NULL &&
1720 strchr(zp->z_format, '%') == NULL &&
1721 strchr(zp->z_format, '/') == NULL)
1722 (void) strcpy(startbuf, zp->z_format);
1723 eat(zp->z_filename, zp->z_linenum);
1724 if (*startbuf == '\0')
1725 error(_("can't determine time zone abbreviation to use just after until time"));
1726 else addtt(starttime,
1727 addtype(startoff, startbuf,
1728 startoff != zp->z_gmtoff,
1729 startttisstd,
1730 startttisgmt));
1731 }
1732 /*
1733 ** Now we may get to set starttime for the next zone line.
1734 */
1735 if (useuntil) {
1736 startttisstd = zp->z_untilrule.r_todisstd;
1737 startttisgmt = zp->z_untilrule.r_todisgmt;
1738 starttime = zp->z_untiltime;
1739 if (!startttisstd)
1740 starttime = tadd(starttime, -stdoff);
1741 if (!startttisgmt)
1742 starttime = tadd(starttime, -gmtoff);
1743 }
1744 }
1745 writezone(zpfirst->z_name);
1746 }
1747
1748 static void
1749 addtt(starttime, type)
1750 const time_t starttime;
1751 int type;
1752 {
1753 if (starttime <= min_time ||
1754 (timecnt == 1 && attypes[0].at < min_time)) {
1755 gmtoffs[0] = gmtoffs[type];
1756 isdsts[0] = isdsts[type];
1757 ttisstds[0] = ttisstds[type];
1758 ttisgmts[0] = ttisgmts[type];
1759 if (abbrinds[type] != 0)
1760 (void) strcpy(chars, &chars[abbrinds[type]]);
1761 abbrinds[0] = 0;
1762 charcnt = strlen(chars) + 1;
1763 typecnt = 1;
1764 timecnt = 0;
1765 type = 0;
1766 }
1767 if (timecnt >= TZ_MAX_TIMES) {
1768 error(_("too many transitions?!"));
1769 (void) exit(EXIT_FAILURE);
1770 }
1771 attypes[timecnt].at = starttime;
1772 attypes[timecnt].type = type;
1773 ++timecnt;
1774 }
1775
1776 static int
1777 addtype(gmtoff, abbr, isdst, ttisstd, ttisgmt)
1778 const long gmtoff;
1779 const char * const abbr;
1780 const int isdst;
1781 const int ttisstd;
1782 const int ttisgmt;
1783 {
1784 register int i, j;
1785
1786 if (isdst != TRUE && isdst != FALSE) {
1787 error(_("internal error - addtype called with bad isdst"));
1788 (void) exit(EXIT_FAILURE);
1789 }
1790 if (ttisstd != TRUE && ttisstd != FALSE) {
1791 error(_("internal error - addtype called with bad ttisstd"));
1792 (void) exit(EXIT_FAILURE);
1793 }
1794 if (ttisgmt != TRUE && ttisgmt != FALSE) {
1795 error(_("internal error - addtype called with bad ttisgmt"));
1796 (void) exit(EXIT_FAILURE);
1797 }
1798 /*
1799 ** See if there's already an entry for this zone type.
1800 ** If so, just return its index.
1801 */
1802 for (i = 0; i < typecnt; ++i) {
1803 if (gmtoff == gmtoffs[i] && isdst == isdsts[i] &&
1804 strcmp(abbr, &chars[abbrinds[i]]) == 0 &&
1805 ttisstd == ttisstds[i] &&
1806 ttisgmt == ttisgmts[i])
1807 return i;
1808 }
1809 /*
1810 ** There isn't one; add a new one, unless there are already too
1811 ** many.
1812 */
1813 if (typecnt >= TZ_MAX_TYPES) {
1814 error(_("too many local time types"));
1815 (void) exit(EXIT_FAILURE);
1816 }
1817 gmtoffs[i] = gmtoff;
1818 isdsts[i] = isdst;
1819 ttisstds[i] = ttisstd;
1820 ttisgmts[i] = ttisgmt;
1821
1822 for (j = 0; j < charcnt; ++j)
1823 if (strcmp(&chars[j], abbr) == 0)
1824 break;
1825 if (j == charcnt)
1826 newabbr(abbr);
1827 abbrinds[i] = j;
1828 ++typecnt;
1829 return i;
1830 }
1831
1832 static void
1833 leapadd(t, positive, rolling, count)
1834 const time_t t;
1835 const int positive;
1836 const int rolling;
1837 int count;
1838 {
1839 register int i, j;
1840
1841 if (leapcnt + (positive ? count : 1) > TZ_MAX_LEAPS) {
1842 error(_("too many leap seconds"));
1843 (void) exit(EXIT_FAILURE);
1844 }
1845 for (i = 0; i < leapcnt; ++i)
1846 if (t <= trans[i]) {
1847 if (t == trans[i]) {
1848 error(_("repeated leap second moment"));
1849 (void) exit(EXIT_FAILURE);
1850 }
1851 break;
1852 }
1853 do {
1854 for (j = leapcnt; j > i; --j) {
1855 trans[j] = trans[j - 1];
1856 corr[j] = corr[j - 1];
1857 roll[j] = roll[j - 1];
1858 }
1859 trans[i] = t;
1860 corr[i] = positive ? 1L : eitol(-count);
1861 roll[i] = rolling;
1862 ++leapcnt;
1863 } while (positive && --count != 0);
1864 }
1865
1866 static void
1867 adjleap P((void))
1868 {
1869 register int i;
1870 register long last = 0;
1871
1872 /*
1873 ** propagate leap seconds forward
1874 */
1875 for (i = 0; i < leapcnt; ++i) {
1876 trans[i] = tadd(trans[i], last);
1877 last = corr[i] += last;
1878 }
1879 }
1880
1881 static int
1882 yearistype(year, type)
1883 const int year;
1884 const char * const type;
1885 {
1886 static char * buf;
1887 int result;
1888
1889 if (type == NULL || *type == '\0')
1890 return TRUE;
1891 buf = erealloc(buf, (int) (132 + strlen(yitcommand) + strlen(type)));
1892 (void) sprintf(buf, "%s %d %s", yitcommand, year, type);
1893 result = system(buf);
1894 if (result == 0)
1895 return TRUE;
1896 if (result == (1 << 8))
1897 return FALSE;
1898 error(_("Wild result from command execution"));
1899 (void) fprintf(stderr, _("%s: command was '%s', result was %d\n"),
1900 progname, buf, result);
1901 for ( ; ; )
1902 (void) exit(EXIT_FAILURE);
1903 }
1904
1905 static int
1906 lowerit(a)
1907 int a;
1908 {
1909 a = (unsigned char) a;
1910 return (isascii(a) && isupper(a)) ? tolower(a) : a;
1911 }
1912
1913 static int
1914 ciequal(ap, bp) /* case-insensitive equality */
1915 register const char * ap;
1916 register const char * bp;
1917 {
1918 while (lowerit(*ap) == lowerit(*bp++))
1919 if (*ap++ == '\0')
1920 return TRUE;
1921 return FALSE;
1922 }
1923
1924 static int
1925 itsabbr(abbr, word)
1926 register const char * abbr;
1927 register const char * word;
1928 {
1929 if (lowerit(*abbr) != lowerit(*word))
1930 return FALSE;
1931 ++word;
1932 while (*++abbr != '\0')
1933 do {
1934 if (*word == '\0')
1935 return FALSE;
1936 } while (lowerit(*word++) != lowerit(*abbr));
1937 return TRUE;
1938 }
1939
1940 static const struct lookup *
1941 byword(word, table)
1942 register const char * const word;
1943 register const struct lookup * const table;
1944 {
1945 register const struct lookup * foundlp;
1946 register const struct lookup * lp;
1947
1948 if (word == NULL || table == NULL)
1949 return NULL;
1950 /*
1951 ** Look for exact match.
1952 */
1953 for (lp = table; lp->l_word != NULL; ++lp)
1954 if (ciequal(word, lp->l_word))
1955 return lp;
1956 /*
1957 ** Look for inexact match.
1958 */
1959 foundlp = NULL;
1960 for (lp = table; lp->l_word != NULL; ++lp)
1961 if (itsabbr(word, lp->l_word)) {
1962 if (foundlp == NULL)
1963 foundlp = lp;
1964 else return NULL; /* multiple inexact matches */
1965 }
1966 return foundlp;
1967 }
1968
1969 static char **
1970 getfields(cp)
1971 register char * cp;
1972 {
1973 register char * dp;
1974 register char ** array;
1975 register int nsubs;
1976
1977 if (cp == NULL)
1978 return NULL;
1979 array = (char **) (void *)
1980 emalloc((int) ((strlen(cp) + 1) * sizeof *array));
1981 nsubs = 0;
1982 for ( ; ; ) {
1983 while (isascii(*cp) && isspace((unsigned char) *cp))
1984 ++cp;
1985 if (*cp == '\0' || *cp == '#')
1986 break;
1987 array[nsubs++] = dp = cp;
1988 do {
1989 if ((*dp = *cp++) != '"')
1990 ++dp;
1991 else while ((*dp = *cp++) != '"')
1992 if (*dp != '\0')
1993 ++dp;
1994 else error(_("Odd number of quotation marks"));
1995 } while (*cp != '\0' && *cp != '#' &&
1996 (!isascii(*cp) || !isspace((unsigned char) *cp)));
1997 if (isascii(*cp) && isspace((unsigned char) *cp))
1998 ++cp;
1999 *dp = '\0';
2000 }
2001 array[nsubs] = NULL;
2002 return array;
2003 }
2004
2005 static long
2006 oadd(t1, t2)
2007 const long t1;
2008 const long t2;
2009 {
2010 register long t;
2011
2012 t = t1 + t2;
2013 if ((t2 > 0 && t <= t1) || (t2 < 0 && t >= t1)) {
2014 error(_("time overflow"));
2015 (void) exit(EXIT_FAILURE);
2016 }
2017 return t;
2018 }
2019
2020 static time_t
2021 tadd(t1, t2)
2022 const time_t t1;
2023 const long t2;
2024 {
2025 register time_t t;
2026
2027 if (t1 == max_time && t2 > 0)
2028 return max_time;
2029 if (t1 == min_time && t2 < 0)
2030 return min_time;
2031 t = t1 + t2;
2032 if ((t2 > 0 && t <= t1) || (t2 < 0 && t >= t1)) {
2033 error(_("time overflow"));
2034 (void) exit(EXIT_FAILURE);
2035 }
2036 return t;
2037 }
2038
2039 /*
2040 ** Given a rule, and a year, compute the date - in seconds since January 1,
2041 ** 1970, 00:00 LOCAL time - in that year that the rule refers to.
2042 */
2043
2044 static time_t
2045 rpytime(rp, wantedy)
2046 register const struct rule * const rp;
2047 register const int wantedy;
2048 {
2049 register int y, m, i;
2050 register long dayoff; /* with a nod to Margaret O. */
2051 register time_t t;
2052
2053 if (wantedy == INT_MIN)
2054 return min_time;
2055 if (wantedy == INT_MAX)
2056 return max_time;
2057 dayoff = 0;
2058 m = TM_JANUARY;
2059 y = EPOCH_YEAR;
2060 while (wantedy != y) {
2061 if (wantedy > y) {
2062 i = len_years[isleap(y)];
2063 ++y;
2064 } else {
2065 --y;
2066 i = -len_years[isleap(y)];
2067 }
2068 dayoff = oadd(dayoff, eitol(i));
2069 }
2070 while (m != rp->r_month) {
2071 i = len_months[isleap(y)][m];
2072 dayoff = oadd(dayoff, eitol(i));
2073 ++m;
2074 }
2075 i = rp->r_dayofmonth;
2076 if (m == TM_FEBRUARY && i == 29 && !isleap(y)) {
2077 if (rp->r_dycode == DC_DOWLEQ)
2078 --i;
2079 else {
2080 error(_("use of 2/29 in non leap-year"));
2081 (void) exit(EXIT_FAILURE);
2082 }
2083 }
2084 --i;
2085 dayoff = oadd(dayoff, eitol(i));
2086 if (rp->r_dycode == DC_DOWGEQ || rp->r_dycode == DC_DOWLEQ) {
2087 register long wday;
2088
2089 #define LDAYSPERWEEK ((long) DAYSPERWEEK)
2090 wday = eitol(EPOCH_WDAY);
2091 /*
2092 ** Don't trust mod of negative numbers.
2093 */
2094 if (dayoff >= 0)
2095 wday = (wday + dayoff) % LDAYSPERWEEK;
2096 else {
2097 wday -= ((-dayoff) % LDAYSPERWEEK);
2098 if (wday < 0)
2099 wday += LDAYSPERWEEK;
2100 }
2101 while (wday != eitol(rp->r_wday))
2102 if (rp->r_dycode == DC_DOWGEQ) {
2103 dayoff = oadd(dayoff, (long) 1);
2104 if (++wday >= LDAYSPERWEEK)
2105 wday = 0;
2106 ++i;
2107 } else {
2108 dayoff = oadd(dayoff, (long) -1);
2109 if (--wday < 0)
2110 wday = LDAYSPERWEEK - 1;
2111 --i;
2112 }
2113 if (i < 0 || i >= len_months[isleap(y)][m]) {
2114 error(_("no day in month matches rule"));
2115 (void) exit(EXIT_FAILURE);
2116 }
2117 }
2118 if (dayoff < 0 && !TYPE_SIGNED(time_t))
2119 return min_time;
2120 t = (time_t) dayoff * SECSPERDAY;
2121 /*
2122 ** Cheap overflow check.
2123 */
2124 if (t / SECSPERDAY != dayoff)
2125 return (dayoff > 0) ? max_time : min_time;
2126 return tadd(t, rp->r_tod);
2127 }
2128
2129 static void
2130 newabbr(string)
2131 const char * const string;
2132 {
2133 register int i;
2134
2135 i = strlen(string) + 1;
2136 if (charcnt + i > TZ_MAX_CHARS) {
2137 error(_("too many, or too long, time zone abbreviations"));
2138 (void) exit(EXIT_FAILURE);
2139 }
2140 (void) strcpy(&chars[charcnt], string);
2141 charcnt += eitol(i);
2142 }
2143
2144 static int
2145 mkdirs(argname)
2146 char * const argname;
2147 {
2148 register char * name;
2149 register char * cp;
2150
2151 if (argname == NULL || *argname == '\0')
2152 return 0;
2153 cp = name = ecpyalloc(argname);
2154 while ((cp = strchr(cp + 1, '/')) != 0) {
2155 *cp = '\0';
2156 #ifndef unix
2157 /*
2158 ** DOS drive specifier?
2159 */
2160 if (isalpha((unsigned char) name[0]) &&
2161 name[1] == ':' && name[2] == '\0') {
2162 *cp = '/';
2163 continue;
2164 }
2165 #endif /* !defined unix */
2166 if (!itsdir(name)) {
2167 /*
2168 ** It doesn't seem to exist, so we try to create it.
2169 ** Creation may fail because of the directory being
2170 ** created by some other multiprocessor, so we get
2171 ** to do extra checking.
2172 */
2173 if (mkdir(name, S_IRUSR|S_IWUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH) != 0) {
2174 const char *e = strerror(errno);
2175
2176 if (errno != EEXIST || !itsdir(name)) {
2177 (void) fprintf(stderr,
2178 _("%s: Can't create directory %s: %s\n"),
2179 progname, name, e);
2180 ifree(name);
2181 return -1;
2182 }
2183 }
2184 }
2185 *cp = '/';
2186 }
2187 ifree(name);
2188 return 0;
2189 }
2190
2191 static long
2192 eitol(i)
2193 const int i;
2194 {
2195 long l;
2196
2197 l = i;
2198 if ((i < 0 && l >= 0) || (i == 0 && l != 0) || (i > 0 && l <= 0)) {
2199 (void) fprintf(stderr,
2200 _("%s: %d did not sign extend correctly\n"),
2201 progname, i);
2202 (void) exit(EXIT_FAILURE);
2203 }
2204 return l;
2205 }
2206
2207 /*
2208 ** UNIX was a registered trademark of UNIX System Laboratories in 1993.
2209 */
Unaltered CVS history