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Update for 960809.
[glibc.git] / time / zic.c
blob0cec89369c3cf79a66785f33e11815f49413dd87
1 #ifndef lint
2 #ifndef NOID
3 static char elsieid[] = "@(#)zic.c 7.77";
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 char * icatalloc P((char * old, const char * new));
83 extern char * icpyalloc P((const char * string));
84 extern void ifree P((char * p));
85 extern char * imalloc P((int n));
86 extern void * irealloc P((void * old, int n));
87 extern int link P((const char * fromname, const char * toname));
88 extern char * optarg;
89 extern int optind;
90 extern char * scheck P((const char * string, const char * format));
91
92 static void addtt P((time_t starttime, int type));
93 static int addtype P((long gmtoff, const char * abbr, int isdst,
94 int ttisstd, int ttisgmt));
95 static void leapadd P((time_t t, int positive, int rolling, int count));
96 static void adjleap P((void));
97 static void associate P((void));
98 static int ciequal P((const char * ap, const char * bp));
99 static void convert P((long val, char * buf));
100 static void dolink P((const char * fromfile, const char * tofile));
101 static void doabbr P((char * abbr, const char * format,
102 const char * letters, int isdst));
103 static void eat P((const char * name, int num));
104 static void eats P((const char * name, int num,
105 const char * rname, int rnum));
106 static long eitol P((int i));
107 static void error P((const char * message));
108 static char ** getfields P((char * buf));
109 static long gethms P((const char * string, const char * errstrng,
110 int signable));
111 static void infile P((const char * filename));
112 static void inleap P((char ** fields, int nfields));
113 static void inlink P((char ** fields, int nfields));
114 static void inrule P((char ** fields, int nfields));
115 static int inzcont P((char ** fields, int nfields));
116 static int inzone P((char ** fields, int nfields));
117 static int inzsub P((char ** fields, int nfields, int iscont));
118 static int itsabbr P((const char * abbr, const char * word));
119 static int itsdir P((const char * name));
120 static int lowerit P((int c));
121 static char * memcheck P((char * tocheck));
122 static int mkdirs P((char * filename));
123 static void newabbr P((const char * abbr));
124 static long oadd P((long t1, long t2));
125 static void outzone P((const struct zone * zp, int ntzones));
126 static void puttzcode P((long code, FILE * fp));
127 static int rcomp P((const void * leftp, const void * rightp));
128 static time_t rpytime P((const struct rule * rp, int wantedy));
129 static void rulesub P((struct rule * rp,
130 const char * loyearp, const char * hiyearp,
131 const char * typep, const char * monthp,
132 const char * dayp, const char * timep));
133 static void setboundaries P((void));
134 static time_t tadd P((time_t t1, long t2));
135 static void usage P((void));
136 static void writezone P((const char * name));
137 static int yearistype P((int year, const char * type));
138
139 #if !HAVE_STRERROR
140 static char * strerror P((int));
141 #endif /* !HAVE_STRERROR */
142
143 static int charcnt;
144 static int errors;
145 static const char * filename;
146 static int leapcnt;
147 static int linenum;
148 static time_t max_time;
149 static int max_year;
150 static time_t min_time;
151 static int min_year;
152 static int noise;
153 static const char * rfilename;
154 static int rlinenum;
155 static const char * progname;
156 static int timecnt;
157 static int typecnt;
158
159 /*
160 ** Line codes.
161 */
162
163 #define LC_RULE 0
164 #define LC_ZONE 1
165 #define LC_LINK 2
166 #define LC_LEAP 3
167
168 /*
169 ** Which fields are which on a Zone line.
170 */
171
172 #define ZF_NAME 1
173 #define ZF_GMTOFF 2
174 #define ZF_RULE 3
175 #define ZF_FORMAT 4
176 #define ZF_TILYEAR 5
177 #define ZF_TILMONTH 6
178 #define ZF_TILDAY 7
179 #define ZF_TILTIME 8
180 #define ZONE_MINFIELDS 5
181 #define ZONE_MAXFIELDS 9
182
183 /*
184 ** Which fields are which on a Zone continuation line.
185 */
186
187 #define ZFC_GMTOFF 0
188 #define ZFC_RULE 1
189 #define ZFC_FORMAT 2
190 #define ZFC_TILYEAR 3
191 #define ZFC_TILMONTH 4
192 #define ZFC_TILDAY 5
193 #define ZFC_TILTIME 6
194 #define ZONEC_MINFIELDS 3
195 #define ZONEC_MAXFIELDS 7
196
197 /*
198 ** Which files are which on a Rule line.
199 */
200
201 #define RF_NAME 1
202 #define RF_LOYEAR 2
203 #define RF_HIYEAR 3
204 #define RF_COMMAND 4
205 #define RF_MONTH 5
206 #define RF_DAY 6
207 #define RF_TOD 7
208 #define RF_STDOFF 8
209 #define RF_ABBRVAR 9
210 #define RULE_FIELDS 10
211
212 /*
213 ** Which fields are which on a Link line.
214 */
215
216 #define LF_FROM 1
217 #define LF_TO 2
218 #define LINK_FIELDS 3
219
220 /*
221 ** Which fields are which on a Leap line.
222 */
223
224 #define LP_YEAR 1
225 #define LP_MONTH 2
226 #define LP_DAY 3
227 #define LP_TIME 4
228 #define LP_CORR 5
229 #define LP_ROLL 6
230 #define LEAP_FIELDS 7
231
232 /*
233 ** Year synonyms.
234 */
235
236 #define YR_MINIMUM 0
237 #define YR_MAXIMUM 1
238 #define YR_ONLY 2
239
240 static struct rule * rules;
241 static int nrules; /* number of rules */
242
243 static struct zone * zones;
244 static int nzones; /* number of zones */
245
246 struct link {
247 const char * l_filename;
248 int l_linenum;
249 const char * l_from;
250 const char * l_to;
251 };
252
253 static struct link * links;
254 static int nlinks;
255
256 struct lookup {
257 const char * l_word;
258 const int l_value;
259 };
260
261 static struct lookup const * byword P((const char * string,
262 const struct lookup * lp));
263
264 static struct lookup const line_codes[] = {
265 { "Rule", LC_RULE },
266 { "Zone", LC_ZONE },
267 { "Link", LC_LINK },
268 { "Leap", LC_LEAP },
269 { NULL, 0}
270 };
271
272 static struct lookup const mon_names[] = {
273 { "January", TM_JANUARY },
274 { "February", TM_FEBRUARY },
275 { "March", TM_MARCH },
276 { "April", TM_APRIL },
277 { "May", TM_MAY },
278 { "June", TM_JUNE },
279 { "July", TM_JULY },
280 { "August", TM_AUGUST },
281 { "September", TM_SEPTEMBER },
282 { "October", TM_OCTOBER },
283 { "November", TM_NOVEMBER },
284 { "December", TM_DECEMBER },
285 { NULL, 0 }
286 };
287
288 static struct lookup const wday_names[] = {
289 { "Sunday", TM_SUNDAY },
290 { "Monday", TM_MONDAY },
291 { "Tuesday", TM_TUESDAY },
292 { "Wednesday", TM_WEDNESDAY },
293 { "Thursday", TM_THURSDAY },
294 { "Friday", TM_FRIDAY },
295 { "Saturday", TM_SATURDAY },
296 { NULL, 0 }
297 };
298
299 static struct lookup const lasts[] = {
300 { "last-Sunday", TM_SUNDAY },
301 { "last-Monday", TM_MONDAY },
302 { "last-Tuesday", TM_TUESDAY },
303 { "last-Wednesday", TM_WEDNESDAY },
304 { "last-Thursday", TM_THURSDAY },
305 { "last-Friday", TM_FRIDAY },
306 { "last-Saturday", TM_SATURDAY },
307 { NULL, 0 }
308 };
309
310 static struct lookup const begin_years[] = {
311 { "minimum", YR_MINIMUM },
312 { "maximum", YR_MAXIMUM },
313 { NULL, 0 }
314 };
315
316 static struct lookup const end_years[] = {
317 { "minimum", YR_MINIMUM },
318 { "maximum", YR_MAXIMUM },
319 { "only", YR_ONLY },
320 { NULL, 0 }
321 };
322
323 static struct lookup const leap_types[] = {
324 { "Rolling", TRUE },
325 { "Stationary", FALSE },
326 { NULL, 0 }
327 };
328
329 static const int len_months[2][MONSPERYEAR] = {
330 { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 },
331 { 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }
332 };
333
334 static const int len_years[2] = {
335 DAYSPERNYEAR, DAYSPERLYEAR
336 };
337
338 static struct attype {
339 time_t at;
340 unsigned char type;
341 } attypes[TZ_MAX_TIMES];
342 static long gmtoffs[TZ_MAX_TYPES];
343 static char isdsts[TZ_MAX_TYPES];
344 static unsigned char abbrinds[TZ_MAX_TYPES];
345 static char ttisstds[TZ_MAX_TYPES];
346 static char ttisgmts[TZ_MAX_TYPES];
347 static char chars[TZ_MAX_CHARS];
348 static time_t trans[TZ_MAX_LEAPS];
349 static long corr[TZ_MAX_LEAPS];
350 static char roll[TZ_MAX_LEAPS];
351
352 /*
353 ** Memory allocation.
354 */
355
356 static char *
357 memcheck(ptr)
358 char * const ptr;
359 {
360 if (ptr == NULL) {
361 const char *e = strerror(errno);
362 (void) fprintf(stderr, _("%s: Memory exhausted: %s\n"),
363 progname, e);
364 (void) exit(EXIT_FAILURE);
365 }
366 return ptr;
367 }
368
369 #define emalloc(size) memcheck(imalloc(size))
370 #define erealloc(ptr, size) memcheck(irealloc((ptr), (size)))
371 #define ecpyalloc(ptr) memcheck(icpyalloc(ptr))
372 #define ecatalloc(oldp, newp) memcheck(icatalloc((oldp), (newp)))
373
374 /*
375 ** Error handling.
376 */
377
378 #if ! HAVE_STRERROR
379 static char *
380 strerror(errnum)
381 int errnum;
382 {
383 extern char *sys_errlist[];
384 extern int sys_nerr;
385
386 if (errnum > 0 && errnum <= sys_nerr)
387 return sys_errlist[errnum];
388 return "Unknown system error";
389 }
390 #endif /* ! HAVE_STRERROR */
391
392 static void
393 eats(name, num, rname, rnum)
394 const char * const name;
395 const int num;
396 const char * const rname;
397 const int rnum;
398 {
399 filename = name;
400 linenum = num;
401 rfilename = rname;
402 rlinenum = rnum;
403 }
404
405 static void
406 eat(name, num)
407 const char * const name;
408 const int num;
409 {
410 eats(name, num, (char *) NULL, -1);
411 }
412
413 static void
414 error(string)
415 const char * const string;
416 {
417 /*
418 ** Match the format of "cc" to allow sh users to
419 ** zic ... 2>&1 | error -t "*" -v
420 ** on BSD systems.
421 */
422 (void) fprintf(stderr, _("\"%s\", line %d: %s"),
423 filename, linenum, string);
424 if (rfilename != NULL)
425 (void) fprintf(stderr, _(" (rule from \"%s\", line %d)"),
426 rfilename, rlinenum);
427 (void) fprintf(stderr, "\n");
428 ++errors;
429 }
430
431 static void
432 warning(string)
433 const char * const string;
434 {
435 char * cp;
436
437 cp = ecpyalloc("warning: ");
438 cp = ecatalloc(cp, string);
439 error(string);
440 ifree(cp);
441 --errors;
442 }
443
444 static void
445 usage P((void))
446 {
447 (void) fprintf(stderr, _("%s: usage is %s [ -s ] [ -v ] [ -l localtime ] [ -p posixrules ] [ -d directory ]\n\t[ -L leapseconds ] [ -y yearistype ] [ filename ... ]\n"),
448 progname, progname);
449 (void) exit(EXIT_FAILURE);
450 }
451
452 static const char * psxrules;
453 static const char * lcltime;
454 static const char * directory;
455 static const char * leapsec;
456 static const char * yitcommand;
457 static int sflag = FALSE;
458
459 int
460 main(argc, argv)
461 int argc;
462 char * argv[];
463 {
464 register int i;
465 register int j;
466 register int c;
467
468 #ifdef unix
469 (void) umask(umask(S_IWGRP | S_IWOTH) | (S_IWGRP | S_IWOTH));
470 #endif /* defined unix */
471 #if HAVE_GETTEXT - 0
472 (void) setlocale(LC_MESSAGES, "");
473 #ifdef TZ_DOMAINDIR
474 (void) bindtextdomain(TZ_DOMAIN, TZ_DOMAINDIR);
475 #endif /* defined TEXTDOMAINDIR */
476 (void) textdomain(TZ_DOMAIN);
477 #endif /* HAVE_GETTEXT - 0 */
478 progname = argv[0];
479 while ((c = getopt(argc, argv, "d:l:p:L:vsy:")) != EOF)
480 switch (c) {
481 default:
482 usage();
483 case 'd':
484 if (directory == NULL)
485 directory = optarg;
486 else {
487 (void) fprintf(stderr,
488 _("%s: More than one -d option specified\n"),
489 progname);
490 (void) exit(EXIT_FAILURE);
491 }
492 break;
493 case 'l':
494 if (lcltime == NULL)
495 lcltime = optarg;
496 else {
497 (void) fprintf(stderr,
498 _("%s: More than one -l option specified\n"),
499 progname);
500 (void) exit(EXIT_FAILURE);
501 }
502 break;
503 case 'p':
504 if (psxrules == NULL)
505 psxrules = optarg;
506 else {
507 (void) fprintf(stderr,
508 _("%s: More than one -p option specified\n"),
509 progname);
510 (void) exit(EXIT_FAILURE);
511 }
512 break;
513 case 'y':
514 if (yitcommand == NULL)
515 yitcommand = optarg;
516 else {
517 (void) fprintf(stderr,
518 _("%s: More than one -y option specified\n"),
519 progname);
520 (void) exit(EXIT_FAILURE);
521 }
522 break;
523 case 'L':
524 if (leapsec == NULL)
525 leapsec = optarg;
526 else {
527 (void) fprintf(stderr,
528 _("%s: More than one -L option specified\n"),
529 progname);
530 (void) exit(EXIT_FAILURE);
531 }
532 break;
533 case 'v':
534 noise = TRUE;
535 break;
536 case 's':
537 sflag = TRUE;
538 break;
539 }
540 if (optind == argc - 1 && strcmp(argv[optind], "=") == 0)
541 usage(); /* usage message by request */
542 if (directory == NULL)
543 directory = TZDIR;
544 if (yitcommand == NULL)
545 yitcommand = "yearistype";
546
547 setboundaries();
548
549 if (optind < argc && leapsec != NULL) {
550 infile(leapsec);
551 adjleap();
552 }
553
554 for (i = optind; i < argc; ++i)
555 infile(argv[i]);
556 if (errors)
557 (void) exit(EXIT_FAILURE);
558 associate();
559 for (i = 0; i < nzones; i = j) {
560 /*
561 ** Find the next non-continuation zone entry.
562 */
563 for (j = i + 1; j < nzones && zones[j].z_name == NULL; ++j)
564 continue;
565 outzone(&zones[i], j - i);
566 }
567 /*
568 ** Make links.
569 */
570 for (i = 0; i < nlinks; ++i)
571 dolink(links[i].l_from, links[i].l_to);
572 if (lcltime != NULL)
573 dolink(lcltime, TZDEFAULT);
574 if (psxrules != NULL)
575 dolink(psxrules, TZDEFRULES);
576 return (errors == 0) ? EXIT_SUCCESS : EXIT_FAILURE;
577 }
578
579 static void
580 dolink(fromfile, tofile)
581 const char * const fromfile;
582 const char * const tofile;
583 {
584 register char * fromname;
585 register char * toname;
586
587 if (fromfile[0] == '/')
588 fromname = ecpyalloc(fromfile);
589 else {
590 fromname = ecpyalloc(directory);
591 fromname = ecatalloc(fromname, "/");
592 fromname = ecatalloc(fromname, fromfile);
593 }
594 if (tofile[0] == '/')
595 toname = ecpyalloc(tofile);
596 else {
597 toname = ecpyalloc(directory);
598 toname = ecatalloc(toname, "/");
599 toname = ecatalloc(toname, tofile);
600 }
601 /*
602 ** We get to be careful here since
603 ** there's a fair chance of root running us.
604 */
605 if (!itsdir(toname))
606 (void) remove(toname);
607 if (link(fromname, toname) != 0) {
608 if (mkdirs(toname) != 0)
609 (void) exit(EXIT_FAILURE);
610 if (link(fromname, toname) != 0) {
611 const char *e = strerror(errno);
612 (void) fprintf(stderr,
613 _("%s: Can't link from %s to %s: %s\n"),
614 progname, fromname, toname, e);
615 (void) exit(EXIT_FAILURE);
616 }
617 }
618 ifree(fromname);
619 ifree(toname);
620 }
621
622 #ifndef INT_MAX
623 #define INT_MAX ((int) (((unsigned)~0)>>1))
624 #endif /* !defined INT_MAX */
625
626 #ifndef INT_MIN
627 #define INT_MIN ((int) ~(((unsigned)~0)>>1))
628 #endif /* !defined INT_MIN */
629
630 /*
631 ** The tz file format currently allows at most 32-bit quantities.
632 ** This restriction should be removed before signed 32-bit values
633 ** wrap around in 2038, but unfortunately this will require a
634 ** change to the tz file format.
635 */
636
637 #define MAX_BITS_IN_FILE 32
638 #define TIME_T_BITS_IN_FILE ((TYPE_BIT(time_t) < MAX_BITS_IN_FILE) ? TYPE_BIT(time_t) : MAX_BITS_IN_FILE)
639
640 static void
641 setboundaries P((void))
642 {
643 if (TYPE_SIGNED(time_t)) {
644 min_time = ~ (time_t) 0;
645 min_time <<= TIME_T_BITS_IN_FILE - 1;
646 max_time = ~ (time_t) 0 - min_time;
647 if (sflag)
648 min_time = 0;
649 } else {
650 min_time = 0;
651 max_time = 2 - sflag;
652 max_time <<= TIME_T_BITS_IN_FILE - 1;
653 --max_time;
654 }
655 min_year = TM_YEAR_BASE + gmtime(&min_time)->tm_year;
656 max_year = TM_YEAR_BASE + gmtime(&max_time)->tm_year;
657 }
658
659 static int
660 itsdir(name)
661 const char * const name;
662 {
663 register char * myname;
664 register int accres;
665
666 myname = ecpyalloc(name);
667 myname = ecatalloc(myname, "/.");
668 accres = access(myname, F_OK);
669 ifree(myname);
670 return accres == 0;
671 }
672
673 /*
674 ** Associate sets of rules with zones.
675 */
676
677 /*
678 ** Sort by rule name.
679 */
680
681 static int
682 rcomp(cp1, cp2)
683 const void * cp1;
684 const void * cp2;
685 {
686 return strcmp(((const struct rule *) cp1)->r_name,
687 ((const struct rule *) cp2)->r_name);
688 }
689
690 static void
691 associate P((void))
692 {
693 register struct zone * zp;
694 register struct rule * rp;
695 register int base, out;
696 register int i, j;
697
698 if (nrules != 0) {
699 (void) qsort((void *) rules, (size_t) nrules,
700 (size_t) sizeof *rules, rcomp);
701 for (i = 0; i < nrules - 1; ++i) {
702 if (strcmp(rules[i].r_name,
703 rules[i + 1].r_name) != 0)
704 continue;
705 if (strcmp(rules[i].r_filename,
706 rules[i + 1].r_filename) == 0)
707 continue;
708 eat(rules[i].r_filename, rules[i].r_linenum);
709 warning(_("same rule name in multiple files"));
710 eat(rules[i + 1].r_filename, rules[i + 1].r_linenum);
711 warning(_("same rule name in multiple files"));
712 for (j = i + 2; j < nrules; ++j) {
713 if (strcmp(rules[i].r_name,
714 rules[j].r_name) != 0)
715 break;
716 if (strcmp(rules[i].r_filename,
717 rules[j].r_filename) == 0)
718 continue;
719 if (strcmp(rules[i + 1].r_filename,
720 rules[j].r_filename) == 0)
721 continue;
722 break;
723 }
724 i = j - 1;
725 }
726 }
727 for (i = 0; i < nzones; ++i) {
728 zp = &zones[i];
729 zp->z_rules = NULL;
730 zp->z_nrules = 0;
731 }
732 for (base = 0; base < nrules; base = out) {
733 rp = &rules[base];
734 for (out = base + 1; out < nrules; ++out)
735 if (strcmp(rp->r_name, rules[out].r_name) != 0)
736 break;
737 for (i = 0; i < nzones; ++i) {
738 zp = &zones[i];
739 if (strcmp(zp->z_rule, rp->r_name) != 0)
740 continue;
741 zp->z_rules = rp;
742 zp->z_nrules = out - base;
743 }
744 }
745 for (i = 0; i < nzones; ++i) {
746 zp = &zones[i];
747 if (zp->z_nrules == 0) {
748 /*
749 ** Maybe we have a local standard time offset.
750 */
751 eat(zp->z_filename, zp->z_linenum);
752 zp->z_stdoff = gethms(zp->z_rule, _("unruly zone"),
753 TRUE);
754 /*
755 ** Note, though, that if there's no rule,
756 ** a '%s' in the format is a bad thing.
757 */
758 if (strchr(zp->z_format, '%') != 0)
759 error(_("%s in ruleless zone"));
760 }
761 }
762 if (errors)
763 (void) exit(EXIT_FAILURE);
764 }
765
766 static void
767 infile(name)
768 const char * name;
769 {
770 register FILE * fp;
771 register char ** fields;
772 register char * cp;
773 register const struct lookup * lp;
774 register int nfields;
775 register int wantcont;
776 register int num;
777 char buf[BUFSIZ];
778
779 if (strcmp(name, "-") == 0) {
780 name = _("standard input");
781 fp = stdin;
782 } else if ((fp = fopen(name, "r")) == NULL) {
783 const char *e = strerror(errno);
784 (void) fprintf(stderr, _("%s: Can't open %s: %s\n"),
785 progname, name, e);
786 (void) exit(EXIT_FAILURE);
787 }
788 wantcont = FALSE;
789 for (num = 1; ; ++num) {
790 eat(name, num);
791 if (fgets(buf, (int) sizeof buf, fp) != buf)
792 break;
793 cp = strchr(buf, '\n');
794 if (cp == NULL) {
795 error(_("line too long"));
796 (void) exit(EXIT_FAILURE);
797 }
798 *cp = '\0';
799 fields = getfields(buf);
800 nfields = 0;
801 while (fields[nfields] != NULL) {
802 static char nada;
803
804 if (strcmp(fields[nfields], "-") == 0)
805 fields[nfields] = &nada;
806 ++nfields;
807 }
808 if (nfields == 0) {
809 /* nothing to do */
810 } else if (wantcont) {
811 wantcont = inzcont(fields, nfields);
812 } else {
813 lp = byword(fields[0], line_codes);
814 if (lp == NULL)
815 error(_("input line of unknown type"));
816 else switch ((int) (lp->l_value)) {
817 case LC_RULE:
818 inrule(fields, nfields);
819 wantcont = FALSE;
820 break;
821 case LC_ZONE:
822 wantcont = inzone(fields, nfields);
823 break;
824 case LC_LINK:
825 inlink(fields, nfields);
826 wantcont = FALSE;
827 break;
828 case LC_LEAP:
829 if (name != leapsec)
830 (void) fprintf(stderr,
831 _("%s: Leap line in non leap seconds file %s\n"),
832 progname, name);
833 else inleap(fields, nfields);
834 wantcont = FALSE;
835 break;
836 default: /* "cannot happen" */
837 (void) fprintf(stderr,
838 _("%s: panic: Invalid l_value %d\n"),
839 progname, lp->l_value);
840 (void) exit(EXIT_FAILURE);
841 }
842 }
843 ifree((char *) fields);
844 }
845 if (ferror(fp)) {
846 (void) fprintf(stderr, _("%s: Error reading %s\n"),
847 progname, filename);
848 (void) exit(EXIT_FAILURE);
849 }
850 if (fp != stdin && fclose(fp)) {
851 const char *e = strerror(errno);
852 (void) fprintf(stderr, _("%s: Error closing %s: %s\n"),
853 progname, filename, e);
854 (void) exit(EXIT_FAILURE);
855 }
856 if (wantcont)
857 error(_("expected continuation line not found"));
858 }
859
860 /*
861 ** Convert a string of one of the forms
862 ** h -h hh:mm -hh:mm hh:mm:ss -hh:mm:ss
863 ** into a number of seconds.
864 ** A null string maps to zero.
865 ** Call error with errstring and return zero on errors.
866 */
867
868 static long
869 gethms(string, errstring, signable)
870 const char * string;
871 const char * const errstring;
872 const int signable;
873 {
874 int hh, mm, ss, sign;
875
876 if (string == NULL || *string == '\0')
877 return 0;
878 if (!signable)
879 sign = 1;
880 else if (*string == '-') {
881 sign = -1;
882 ++string;
883 } else sign = 1;
884 if (sscanf(string, scheck(string, "%d"), &hh) == 1)
885 mm = ss = 0;
886 else if (sscanf(string, scheck(string, "%d:%d"), &hh, &mm) == 2)
887 ss = 0;
888 else if (sscanf(string, scheck(string, "%d:%d:%d"),
889 &hh, &mm, &ss) != 3) {
890 error(errstring);
891 return 0;
892 }
893 if (hh < 0 || hh >= HOURSPERDAY ||
894 mm < 0 || mm >= MINSPERHOUR ||
895 ss < 0 || ss > SECSPERMIN) {
896 error(errstring);
897 return 0;
898 }
899 return eitol(sign) *
900 (eitol(hh * MINSPERHOUR + mm) *
901 eitol(SECSPERMIN) + eitol(ss));
902 }
903
904 static void
905 inrule(fields, nfields)
906 register char ** const fields;
907 const int nfields;
908 {
909 static struct rule r;
910
911 if (nfields != RULE_FIELDS) {
912 error(_("wrong number of fields on Rule line"));
913 return;
914 }
915 if (*fields[RF_NAME] == '\0') {
916 error(_("nameless rule"));
917 return;
918 }
919 r.r_filename = filename;
920 r.r_linenum = linenum;
921 r.r_stdoff = gethms(fields[RF_STDOFF], _("invalid saved time"), TRUE);
922 rulesub(&r, fields[RF_LOYEAR], fields[RF_HIYEAR], fields[RF_COMMAND],
923 fields[RF_MONTH], fields[RF_DAY], fields[RF_TOD]);
924 r.r_name = ecpyalloc(fields[RF_NAME]);
925 r.r_abbrvar = ecpyalloc(fields[RF_ABBRVAR]);
926 rules = (struct rule *) (void *) erealloc((char *) rules,
927 (int) ((nrules + 1) * sizeof *rules));
928 rules[nrules++] = r;
929 }
930
931 static int
932 inzone(fields, nfields)
933 register char ** const fields;
934 const int nfields;
935 {
936 register int i;
937 static char * buf;
938
939 if (nfields < ZONE_MINFIELDS || nfields > ZONE_MAXFIELDS) {
940 error(_("wrong number of fields on Zone line"));
941 return FALSE;
942 }
943 if (strcmp(fields[ZF_NAME], TZDEFAULT) == 0 && lcltime != NULL) {
944 buf = erealloc(buf, (int) (132 + strlen(TZDEFAULT)));
945 (void) sprintf(buf,
946 _("\"Zone %s\" line and -l option are mutually exclusive"),
947 TZDEFAULT);
948 error(buf);
949 return FALSE;
950 }
951 if (strcmp(fields[ZF_NAME], TZDEFRULES) == 0 && psxrules != NULL) {
952 buf = erealloc(buf, (int) (132 + strlen(TZDEFRULES)));
953 (void) sprintf(buf,
954 _("\"Zone %s\" line and -p option are mutually exclusive"),
955 TZDEFRULES);
956 error(buf);
957 return FALSE;
958 }
959 for (i = 0; i < nzones; ++i)
960 if (zones[i].z_name != NULL &&
961 strcmp(zones[i].z_name, fields[ZF_NAME]) == 0) {
962 buf = erealloc(buf, (int) (132 +
963 strlen(fields[ZF_NAME]) +
964 strlen(zones[i].z_filename)));
965 (void) sprintf(buf,
966 _("duplicate zone name %s (file \"%s\", line %d)"),
967 fields[ZF_NAME],
968 zones[i].z_filename,
969 zones[i].z_linenum);
970 error(buf);
971 return FALSE;
972 }
973 return inzsub(fields, nfields, FALSE);
974 }
975
976 static int
977 inzcont(fields, nfields)
978 register char ** const fields;
979 const int nfields;
980 {
981 if (nfields < ZONEC_MINFIELDS || nfields > ZONEC_MAXFIELDS) {
982 error(_("wrong number of fields on Zone continuation line"));
983 return FALSE;
984 }
985 return inzsub(fields, nfields, TRUE);
986 }
987
988 static int
989 inzsub(fields, nfields, iscont)
990 register char ** const fields;
991 const int nfields;
992 const int iscont;
993 {
994 register char * cp;
995 static struct zone z;
996 register int i_gmtoff, i_rule, i_format;
997 register int i_untilyear, i_untilmonth;
998 register int i_untilday, i_untiltime;
999 register int hasuntil;
1000
1001 if (iscont) {
1002 i_gmtoff = ZFC_GMTOFF;
1003 i_rule = ZFC_RULE;
1004 i_format = ZFC_FORMAT;
1005 i_untilyear = ZFC_TILYEAR;
1006 i_untilmonth = ZFC_TILMONTH;
1007 i_untilday = ZFC_TILDAY;
1008 i_untiltime = ZFC_TILTIME;
1009 z.z_name = NULL;
1010 } else {
1011 i_gmtoff = ZF_GMTOFF;
1012 i_rule = ZF_RULE;
1013 i_format = ZF_FORMAT;
1014 i_untilyear = ZF_TILYEAR;
1015 i_untilmonth = ZF_TILMONTH;
1016 i_untilday = ZF_TILDAY;
1017 i_untiltime = ZF_TILTIME;
1018 z.z_name = ecpyalloc(fields[ZF_NAME]);
1019 }
1020 z.z_filename = filename;
1021 z.z_linenum = linenum;
1022 z.z_gmtoff = gethms(fields[i_gmtoff], _("invalid GMT offset"), TRUE);
1023 if ((cp = strchr(fields[i_format], '%')) != 0) {
1024 if (*++cp != 's' || strchr(cp, '%') != 0) {
1025 error(_("invalid abbreviation format"));
1026 return FALSE;
1027 }
1028 }
1029 z.z_rule = ecpyalloc(fields[i_rule]);
1030 z.z_format = ecpyalloc(fields[i_format]);
1031 hasuntil = nfields > i_untilyear;
1032 if (hasuntil) {
1033 z.z_untilrule.r_filename = filename;
1034 z.z_untilrule.r_linenum = linenum;
1035 rulesub(&z.z_untilrule,
1036 fields[i_untilyear],
1037 "only",
1038 "",
1039 (nfields > i_untilmonth) ?
1040 fields[i_untilmonth] : "Jan",
1041 (nfields > i_untilday) ? fields[i_untilday] : "1",
1042 (nfields > i_untiltime) ? fields[i_untiltime] : "0");
1043 z.z_untiltime = rpytime(&z.z_untilrule,
1044 z.z_untilrule.r_loyear);
1045 if (iscont && nzones > 0 &&
1046 z.z_untiltime > min_time &&
1047 z.z_untiltime < max_time &&
1048 zones[nzones - 1].z_untiltime > min_time &&
1049 zones[nzones - 1].z_untiltime < max_time &&
1050 zones[nzones - 1].z_untiltime >= z.z_untiltime) {
1051 error(_("Zone continuation line end time is not after end time of previous line"));
1052 return FALSE;
1053 }
1054 }
1055 zones = (struct zone *) (void *) erealloc((char *) zones,
1056 (int) ((nzones + 1) * sizeof *zones));
1057 zones[nzones++] = z;
1058 /*
1059 ** If there was an UNTIL field on this line,
1060 ** there's more information about the zone on the next line.
1061 */
1062 return hasuntil;
1063 }
1064
1065 static void
1066 inleap(fields, nfields)
1067 register char ** const fields;
1068 const int nfields;
1069 {
1070 register const char * cp;
1071 register const struct lookup * lp;
1072 register int i, j;
1073 int year, month, day;
1074 long dayoff, tod;
1075 time_t t;
1076
1077 if (nfields != LEAP_FIELDS) {
1078 error(_("wrong number of fields on Leap line"));
1079 return;
1080 }
1081 dayoff = 0;
1082 cp = fields[LP_YEAR];
1083 if (sscanf(cp, scheck(cp, "%d"), &year) != 1) {
1084 /*
1085 * Leapin' Lizards!
1086 */
1087 error(_("invalid leaping year"));
1088 return;
1089 }
1090 j = EPOCH_YEAR;
1091 while (j != year) {
1092 if (year > j) {
1093 i = len_years[isleap(j)];
1094 ++j;
1095 } else {
1096 --j;
1097 i = -len_years[isleap(j)];
1098 }
1099 dayoff = oadd(dayoff, eitol(i));
1100 }
1101 if ((lp = byword(fields[LP_MONTH], mon_names)) == NULL) {
1102 error(_("invalid month name"));
1103 return;
1104 }
1105 month = lp->l_value;
1106 j = TM_JANUARY;
1107 while (j != month) {
1108 i = len_months[isleap(year)][j];
1109 dayoff = oadd(dayoff, eitol(i));
1110 ++j;
1111 }
1112 cp = fields[LP_DAY];
1113 if (sscanf(cp, scheck(cp, "%d"), &day) != 1 ||
1114 day <= 0 || day > len_months[isleap(year)][month]) {
1115 error(_("invalid day of month"));
1116 return;
1117 }
1118 dayoff = oadd(dayoff, eitol(day - 1));
1119 if (dayoff < 0 && !TYPE_SIGNED(time_t)) {
1120 error(_("time before zero"));
1121 return;
1122 }
1123 t = (time_t) dayoff * SECSPERDAY;
1124 /*
1125 ** Cheap overflow check.
1126 */
1127 if (t / SECSPERDAY != dayoff) {
1128 error(_("time overflow"));
1129 return;
1130 }
1131 tod = gethms(fields[LP_TIME], _("invalid time of day"), FALSE);
1132 cp = fields[LP_CORR];
1133 {
1134 register int positive;
1135 int count;
1136
1137 if (strcmp(cp, "") == 0) { /* infile() turns "-" into "" */
1138 positive = FALSE;
1139 count = 1;
1140 } else if (strcmp(cp, "--") == 0) {
1141 positive = FALSE;
1142 count = 2;
1143 } else if (strcmp(cp, "+") == 0) {
1144 positive = TRUE;
1145 count = 1;
1146 } else if (strcmp(cp, "++") == 0) {
1147 positive = TRUE;
1148 count = 2;
1149 } else {
1150 error(_("illegal CORRECTION field on Leap line"));
1151 return;
1152 }
1153 if ((lp = byword(fields[LP_ROLL], leap_types)) == NULL) {
1154 error(_("illegal Rolling/Stationary field on Leap line"));
1155 return;
1156 }
1157 leapadd(tadd(t, tod), positive, lp->l_value, count);
1158 }
1159 }
1160
1161 static void
1162 inlink(fields, nfields)
1163 register char ** const fields;
1164 const int nfields;
1165 {
1166 struct link l;
1167
1168 if (nfields != LINK_FIELDS) {
1169 error(_("wrong number of fields on Link line"));
1170 return;
1171 }
1172 if (*fields[LF_FROM] == '\0') {
1173 error(_("blank FROM field on Link line"));
1174 return;
1175 }
1176 if (*fields[LF_TO] == '\0') {
1177 error(_("blank TO field on Link line"));
1178 return;
1179 }
1180 l.l_filename = filename;
1181 l.l_linenum = linenum;
1182 l.l_from = ecpyalloc(fields[LF_FROM]);
1183 l.l_to = ecpyalloc(fields[LF_TO]);
1184 links = (struct link *) (void *) erealloc((char *) links,
1185 (int) ((nlinks + 1) * sizeof *links));
1186 links[nlinks++] = l;
1187 }
1188
1189 static void
1190 rulesub(rp, loyearp, hiyearp, typep, monthp, dayp, timep)
1191 register struct rule * const rp;
1192 const char * const loyearp;
1193 const char * const hiyearp;
1194 const char * const typep;
1195 const char * const monthp;
1196 const char * const dayp;
1197 const char * const timep;
1198 {
1199 register const struct lookup * lp;
1200 register const char * cp;
1201 register char * dp;
1202 register char * ep;
1203
1204 if ((lp = byword(monthp, mon_names)) == NULL) {
1205 error(_("invalid month name"));
1206 return;
1207 }
1208 rp->r_month = lp->l_value;
1209 rp->r_todisstd = FALSE;
1210 rp->r_todisgmt = FALSE;
1211 dp = ecpyalloc(timep);
1212 if (*dp != '\0') {
1213 ep = dp + strlen(dp) - 1;
1214 switch (lowerit(*ep)) {
1215 case 's': /* Standard */
1216 rp->r_todisstd = TRUE;
1217 rp->r_todisgmt = FALSE;
1218 *ep = '\0';
1219 break;
1220 case 'w': /* Wall */
1221 rp->r_todisstd = FALSE;
1222 rp->r_todisgmt = FALSE;
1223 *ep = '\0';
1224 case 'g': /* Greenwich */
1225 case 'u': /* Universal */
1226 case 'z': /* Zulu */
1227 rp->r_todisstd = TRUE;
1228 rp->r_todisgmt = TRUE;
1229 *ep = '\0';
1230 break;
1231 }
1232 }
1233 rp->r_tod = gethms(dp, _("invalid time of day"), FALSE);
1234 ifree(dp);
1235 /*
1236 ** Year work.
1237 */
1238 cp = loyearp;
1239 lp = byword(cp, begin_years);
1240 if (lp != NULL) switch ((int) lp->l_value) {
1241 case YR_MINIMUM:
1242 rp->r_loyear = INT_MIN;
1243 break;
1244 case YR_MAXIMUM:
1245 rp->r_loyear = INT_MAX;
1246 break;
1247 default: /* "cannot happen" */
1248 (void) fprintf(stderr,
1249 _("%s: panic: Invalid l_value %d\n"),
1250 progname, lp->l_value);
1251 (void) exit(EXIT_FAILURE);
1252 } else if (sscanf(cp, scheck(cp, "%d"), &rp->r_loyear) != 1) {
1253 error(_("invalid starting year"));
1254 return;
1255 }
1256 cp = hiyearp;
1257 if ((lp = byword(cp, end_years)) != NULL) switch ((int) lp->l_value) {
1258 case YR_MINIMUM:
1259 rp->r_hiyear = INT_MIN;
1260 break;
1261 case YR_MAXIMUM:
1262 rp->r_hiyear = INT_MAX;
1263 break;
1264 case YR_ONLY:
1265 rp->r_hiyear = rp->r_loyear;
1266 break;
1267 default: /* "cannot happen" */
1268 (void) fprintf(stderr,
1269 _("%s: panic: Invalid l_value %d\n"),
1270 progname, lp->l_value);
1271 (void) exit(EXIT_FAILURE);
1272 } else if (sscanf(cp, scheck(cp, "%d"), &rp->r_hiyear) != 1) {
1273 error(_("invalid ending year"));
1274 return;
1275 }
1276 if (rp->r_loyear > rp->r_hiyear) {
1277 error(_("starting year greater than ending year"));
1278 return;
1279 }
1280 if (*typep == '\0')
1281 rp->r_yrtype = NULL;
1282 else {
1283 if (rp->r_loyear == rp->r_hiyear) {
1284 error(_("typed single year"));
1285 return;
1286 }
1287 rp->r_yrtype = ecpyalloc(typep);
1288 }
1289 /*
1290 ** Day work.
1291 ** Accept things such as:
1292 ** 1
1293 ** last-Sunday
1294 ** Sun<=20
1295 ** Sun>=7
1296 */
1297 dp = ecpyalloc(dayp);
1298 if ((lp = byword(dp, lasts)) != NULL) {
1299 rp->r_dycode = DC_DOWLEQ;
1300 rp->r_wday = lp->l_value;
1301 rp->r_dayofmonth = len_months[1][rp->r_month];
1302 } else {
1303 if ((ep = strchr(dp, '<')) != 0)
1304 rp->r_dycode = DC_DOWLEQ;
1305 else if ((ep = strchr(dp, '>')) != 0)
1306 rp->r_dycode = DC_DOWGEQ;
1307 else {
1308 ep = dp;
1309 rp->r_dycode = DC_DOM;
1310 }
1311 if (rp->r_dycode != DC_DOM) {
1312 *ep++ = 0;
1313 if (*ep++ != '=') {
1314 error(_("invalid day of month"));
1315 ifree(dp);
1316 return;
1317 }
1318 if ((lp = byword(dp, wday_names)) == NULL) {
1319 error(_("invalid weekday name"));
1320 ifree(dp);
1321 return;
1322 }
1323 rp->r_wday = lp->l_value;
1324 }
1325 if (sscanf(ep, scheck(ep, "%d"), &rp->r_dayofmonth) != 1 ||
1326 rp->r_dayofmonth <= 0 ||
1327 (rp->r_dayofmonth > len_months[1][rp->r_month])) {
1328 error(_("invalid day of month"));
1329 ifree(dp);
1330 return;
1331 }
1332 }
1333 ifree(dp);
1334 }
1335
1336 static void
1337 convert(val, buf)
1338 const long val;
1339 char * const buf;
1340 {
1341 register int i;
1342 register long shift;
1343
1344 for (i = 0, shift = 24; i < 4; ++i, shift -= 8)
1345 buf[i] = val >> shift;
1346 }
1347
1348 static void
1349 puttzcode(val, fp)
1350 const long val;
1351 FILE * const fp;
1352 {
1353 char buf[4];
1354
1355 convert(val, buf);
1356 (void) fwrite((void *) buf, (size_t) sizeof buf, (size_t) 1, fp);
1357 }
1358
1359 static int
1360 atcomp(avp, bvp)
1361 void * avp;
1362 void * bvp;
1363 {
1364 if (((struct attype *) avp)->at < ((struct attype *) bvp)->at)
1365 return -1;
1366 else if (((struct attype *) avp)->at > ((struct attype *) bvp)->at)
1367 return 1;
1368 else return 0;
1369 }
1370
1371 static void
1372 writezone(name)
1373 const char * const name;
1374 {
1375 register FILE * fp;
1376 register int i, j;
1377 static char * fullname;
1378 static struct tzhead tzh;
1379 time_t ats[TZ_MAX_TIMES];
1380 unsigned char types[TZ_MAX_TIMES];
1381
1382 /*
1383 ** Sort.
1384 */
1385 if (timecnt > 1)
1386 (void) qsort((void *) attypes, (size_t) timecnt,
1387 (size_t) sizeof *attypes, atcomp);
1388 /*
1389 ** Optimize.
1390 */
1391 {
1392 int fromi;
1393 int toi;
1394
1395 toi = 0;
1396 fromi = 0;
1397 if (isdsts[0] == 0)
1398 while (attypes[fromi].type == 0)
1399 ++fromi; /* handled by default rule */
1400 for ( ; fromi < timecnt; ++fromi) {
1401 if (toi != 0
1402 && ((attypes[fromi].at
1403 + gmtoffs[attypes[toi - 1].type])
1404 <= (attypes[toi - 1].at
1405 + gmtoffs[toi == 1 ? 0
1406 : attypes[toi - 2].type]))) {
1407 attypes[toi - 1].type = attypes[fromi].type;
1408 continue;
1409 }
1410 if (toi == 0 ||
1411 attypes[toi - 1].type != attypes[fromi].type)
1412 attypes[toi++] = attypes[fromi];
1413 }
1414 timecnt = toi;
1415 }
1416 /*
1417 ** Transfer.
1418 */
1419 for (i = 0; i < timecnt; ++i) {
1420 ats[i] = attypes[i].at;
1421 types[i] = attypes[i].type;
1422 }
1423 fullname = erealloc(fullname,
1424 (int) (strlen(directory) + 1 + strlen(name) + 1));
1425 (void) sprintf(fullname, "%s/%s", directory, name);
1426 if ((fp = fopen(fullname, "wb")) == NULL) {
1427 if (mkdirs(fullname) != 0)
1428 (void) exit(EXIT_FAILURE);
1429 if ((fp = fopen(fullname, "wb")) == NULL) {
1430 const char *e = strerror(errno);
1431 (void) fprintf(stderr, _("%s: Can't create %s: %s\n"),
1432 progname, fullname, e);
1433 (void) exit(EXIT_FAILURE);
1434 }
1435 }
1436 convert(eitol(typecnt), tzh.tzh_ttisgmtcnt);
1437 convert(eitol(typecnt), tzh.tzh_ttisstdcnt);
1438 convert(eitol(leapcnt), tzh.tzh_leapcnt);
1439 convert(eitol(timecnt), tzh.tzh_timecnt);
1440 convert(eitol(typecnt), tzh.tzh_typecnt);
1441 convert(eitol(charcnt), tzh.tzh_charcnt);
1442 #define DO(field) (void) fwrite((void *) tzh.field, (size_t) sizeof tzh.field, (size_t) 1, fp)
1443 DO(tzh_reserved);
1444 DO(tzh_ttisgmtcnt);
1445 DO(tzh_ttisstdcnt);
1446 DO(tzh_leapcnt);
1447 DO(tzh_timecnt);
1448 DO(tzh_typecnt);
1449 DO(tzh_charcnt);
1450 #undef DO
1451 for (i = 0; i < timecnt; ++i) {
1452 j = leapcnt;
1453 while (--j >= 0)
1454 if (ats[i] >= trans[j]) {
1455 ats[i] = tadd(ats[i], corr[j]);
1456 break;
1457 }
1458 puttzcode((long) ats[i], fp);
1459 }
1460 if (timecnt > 0)
1461 (void) fwrite((void *) types, (size_t) sizeof types[0],
1462 (size_t) timecnt, fp);
1463 for (i = 0; i < typecnt; ++i) {
1464 puttzcode((long) gmtoffs[i], fp);
1465 (void) putc(isdsts[i], fp);
1466 (void) putc(abbrinds[i], fp);
1467 }
1468 if (charcnt != 0)
1469 (void) fwrite((void *) chars, (size_t) sizeof chars[0],
1470 (size_t) charcnt, fp);
1471 for (i = 0; i < leapcnt; ++i) {
1472 if (roll[i]) {
1473 if (timecnt == 0 || trans[i] < ats[0]) {
1474 j = 0;
1475 while (isdsts[j])
1476 if (++j >= typecnt) {
1477 j = 0;
1478 break;
1479 }
1480 } else {
1481 j = 1;
1482 while (j < timecnt && trans[i] >= ats[j])
1483 ++j;
1484 j = types[j - 1];
1485 }
1486 puttzcode((long) tadd(trans[i], -gmtoffs[j]), fp);
1487 } else puttzcode((long) trans[i], fp);
1488 puttzcode((long) corr[i], fp);
1489 }
1490 for (i = 0; i < typecnt; ++i)
1491 (void) putc(ttisstds[i], fp);
1492 for (i = 0; i < typecnt; ++i)
1493 (void) putc(ttisgmts[i], fp);
1494 if (ferror(fp) || fclose(fp)) {
1495 (void) fprintf(stderr, _("%s: Error writing %s\n"),
1496 progname, fullname);
1497 (void) exit(EXIT_FAILURE);
1498 }
1499 }
1500
1501 static void
1502 doabbr(abbr, format, letters, isdst)
1503 char * const abbr;
1504 const char * const format;
1505 const char * const letters;
1506 const int isdst;
1507 {
1508 if (strchr(format, '/') == NULL) {
1509 if (letters == NULL)
1510 (void) strcpy(abbr, format);
1511 else (void) sprintf(abbr, format, letters);
1512 } else if (isdst)
1513 (void) strcpy(abbr, strchr(format, '/') + 1);
1514 else {
1515 (void) strcpy(abbr, format);
1516 *strchr(abbr, '/') = '\0';
1517 }
1518 }
1519
1520 static void
1521 outzone(zpfirst, zonecount)
1522 const struct zone * const zpfirst;
1523 const int zonecount;
1524 {
1525 register const struct zone * zp;
1526 register struct rule * rp;
1527 register int i, j;
1528 register int usestart, useuntil;
1529 register time_t starttime, untiltime;
1530 register long gmtoff;
1531 register long stdoff;
1532 register int year;
1533 register long startoff;
1534 register int startttisstd;
1535 register int startttisgmt;
1536 register int type;
1537 char startbuf[BUFSIZ];
1538
1539 INITIALIZE(untiltime);
1540 INITIALIZE(starttime);
1541 /*
1542 ** Now. . .finally. . .generate some useful data!
1543 */
1544 timecnt = 0;
1545 typecnt = 0;
1546 charcnt = 0;
1547 /*
1548 ** A guess that may well be corrected later.
1549 */
1550 stdoff = 0;
1551 /*
1552 ** Thanks to Earl Chew (earl@dnd.icp.nec.com.au)
1553 ** for noting the need to unconditionally initialize startttisstd.
1554 */
1555 startttisstd = FALSE;
1556 startttisgmt = FALSE;
1557 for (i = 0; i < zonecount; ++i) {
1558 zp = &zpfirst[i];
1559 usestart = i > 0 && (zp - 1)->z_untiltime > min_time;
1560 useuntil = i < (zonecount - 1);
1561 if (useuntil && zp->z_untiltime <= min_time)
1562 continue;
1563 gmtoff = zp->z_gmtoff;
1564 eat(zp->z_filename, zp->z_linenum);
1565 *startbuf = '\0';
1566 startoff = zp->z_gmtoff;
1567 if (zp->z_nrules == 0) {
1568 stdoff = zp->z_stdoff;
1569 doabbr(startbuf, zp->z_format,
1570 (char *) NULL, stdoff != 0);
1571 type = addtype(oadd(zp->z_gmtoff, stdoff),
1572 startbuf, stdoff != 0, startttisstd,
1573 startttisgmt);
1574 if (usestart) {
1575 addtt(starttime, type);
1576 usestart = FALSE;
1577 }
1578 else if (stdoff != 0)
1579 addtt(min_time, type);
1580 } else for (year = min_year; year <= max_year; ++year) {
1581 if (useuntil && year > zp->z_untilrule.r_hiyear)
1582 break;
1583 /*
1584 ** Mark which rules to do in the current year.
1585 ** For those to do, calculate rpytime(rp, year);
1586 */
1587 for (j = 0; j < zp->z_nrules; ++j) {
1588 rp = &zp->z_rules[j];
1589 eats(zp->z_filename, zp->z_linenum,
1590 rp->r_filename, rp->r_linenum);
1591 rp->r_todo = year >= rp->r_loyear &&
1592 year <= rp->r_hiyear &&
1593 yearistype(year, rp->r_yrtype);
1594 if (rp->r_todo)
1595 rp->r_temp = rpytime(rp, year);
1596 }
1597 for ( ; ; ) {
1598 register int k;
1599 register time_t jtime, ktime;
1600 register long offset;
1601 char buf[BUFSIZ];
1602
1603 INITIALIZE(ktime);
1604 if (useuntil) {
1605 /*
1606 ** Turn untiltime into GMT
1607 ** assuming the current gmtoff and
1608 ** stdoff values.
1609 */
1610 untiltime = zp->z_untiltime;
1611 if (!zp->z_untilrule.r_todisgmt)
1612 untiltime = tadd(untiltime,
1613 -gmtoff);
1614 if (!zp->z_untilrule.r_todisstd)
1615 untiltime = tadd(untiltime,
1616 -stdoff);
1617 }
1618 /*
1619 ** Find the rule (of those to do, if any)
1620 ** that takes effect earliest in the year.
1621 */
1622 k = -1;
1623 for (j = 0; j < zp->z_nrules; ++j) {
1624 rp = &zp->z_rules[j];
1625 if (!rp->r_todo)
1626 continue;
1627 eats(zp->z_filename, zp->z_linenum,
1628 rp->r_filename, rp->r_linenum);
1629 offset = rp->r_todisgmt ? 0 : gmtoff;
1630 if (!rp->r_todisstd)
1631 offset = oadd(offset, stdoff);
1632 jtime = rp->r_temp;
1633 if (jtime == min_time ||
1634 jtime == max_time)
1635 continue;
1636 jtime = tadd(jtime, -offset);
1637 if (k < 0 || jtime < ktime) {
1638 k = j;
1639 ktime = jtime;
1640 }
1641 }
1642 if (k < 0)
1643 break; /* go on to next year */
1644 rp = &zp->z_rules[k];
1645 rp->r_todo = FALSE;
1646 if (useuntil && ktime >= untiltime)
1647 break;
1648 stdoff = rp->r_stdoff;
1649 if (usestart && ktime == starttime)
1650 usestart = FALSE;
1651 if (usestart) {
1652 if (ktime < starttime) {
1653 startoff = oadd(zp->z_gmtoff,
1654 stdoff);
1655 doabbr(startbuf, zp->z_format,
1656 rp->r_abbrvar,
1657 rp->r_stdoff != 0);
1658 continue;
1659 }
1660 if (*startbuf == '\0' &&
1661 startoff == oadd(zp->z_gmtoff,
1662 stdoff)) {
1663 doabbr(startbuf, zp->z_format,
1664 rp->r_abbrvar,
1665 rp->r_stdoff != 0);
1666 }
1667 }
1668 eats(zp->z_filename, zp->z_linenum,
1669 rp->r_filename, rp->r_linenum);
1670 doabbr(buf, zp->z_format, rp->r_abbrvar,
1671 rp->r_stdoff != 0);
1672 offset = oadd(zp->z_gmtoff, rp->r_stdoff);
1673 type = addtype(offset, buf, rp->r_stdoff != 0,
1674 rp->r_todisstd, rp->r_todisgmt);
1675 addtt(ktime, type);
1676 }
1677 }
1678 if (usestart) {
1679 if (*startbuf == '\0' &&
1680 zp->z_format != NULL &&
1681 strchr(zp->z_format, '%') == NULL &&
1682 strchr(zp->z_format, '/') == NULL)
1683 (void) strcpy(startbuf, zp->z_format);
1684 eat(zp->z_filename, zp->z_linenum);
1685 if (*startbuf == '\0')
1686 error(_("can't determine time zone abbrevation to use just after until time"));
1687 else addtt(starttime,
1688 addtype(startoff, startbuf,
1689 startoff != zp->z_gmtoff,
1690 startttisstd,
1691 startttisgmt));
1692 }
1693 /*
1694 ** Now we may get to set starttime for the next zone line.
1695 */
1696 if (useuntil) {
1697 startttisstd = zp->z_untilrule.r_todisstd;
1698 startttisgmt = zp->z_untilrule.r_todisgmt;
1699 starttime = zp->z_untiltime;
1700 if (!startttisstd)
1701 starttime = tadd(starttime, -stdoff);
1702 if (!startttisgmt)
1703 starttime = tadd(starttime, -gmtoff);
1704 }
1705 }
1706 writezone(zpfirst->z_name);
1707 }
1708
1709 static void
1710 addtt(starttime, type)
1711 const time_t starttime;
1712 const int type;
1713 {
1714 if (timecnt >= TZ_MAX_TIMES) {
1715 error(_("too many transitions?!"));
1716 (void) exit(EXIT_FAILURE);
1717 }
1718 attypes[timecnt].at = starttime;
1719 attypes[timecnt].type = type;
1720 ++timecnt;
1721 }
1722
1723 static int
1724 addtype(gmtoff, abbr, isdst, ttisstd, ttisgmt)
1725 const long gmtoff;
1726 const char * const abbr;
1727 const int isdst;
1728 const int ttisstd;
1729 const int ttisgmt;
1730 {
1731 register int i, j;
1732
1733 if (isdst != TRUE && isdst != FALSE) {
1734 error(_("internal error - addtype called with bad isdst"));
1735 (void) exit(EXIT_FAILURE);
1736 }
1737 if (ttisstd != TRUE && ttisstd != FALSE) {
1738 error(_("internal error - addtype called with bad ttisstd"));
1739 (void) exit(EXIT_FAILURE);
1740 }
1741 if (ttisgmt != TRUE && ttisgmt != FALSE) {
1742 error(_("internal error - addtype called with bad ttisgmt"));
1743 (void) exit(EXIT_FAILURE);
1744 }
1745 /*
1746 ** See if there's already an entry for this zone type.
1747 ** If so, just return its index.
1748 */
1749 for (i = 0; i < typecnt; ++i) {
1750 if (gmtoff == gmtoffs[i] && isdst == isdsts[i] &&
1751 strcmp(abbr, &chars[abbrinds[i]]) == 0 &&
1752 ttisstd == ttisstds[i] &&
1753 ttisgmt == ttisgmts[i])
1754 return i;
1755 }
1756 /*
1757 ** There isn't one; add a new one, unless there are already too
1758 ** many.
1759 */
1760 if (typecnt >= TZ_MAX_TYPES) {
1761 error(_("too many local time types"));
1762 (void) exit(EXIT_FAILURE);
1763 }
1764 gmtoffs[i] = gmtoff;
1765 isdsts[i] = isdst;
1766 ttisstds[i] = ttisstd;
1767 ttisgmts[i] = ttisgmt;
1768
1769 for (j = 0; j < charcnt; ++j)
1770 if (strcmp(&chars[j], abbr) == 0)
1771 break;
1772 if (j == charcnt)
1773 newabbr(abbr);
1774 abbrinds[i] = j;
1775 ++typecnt;
1776 return i;
1777 }
1778
1779 static void
1780 leapadd(t, positive, rolling, count)
1781 const time_t t;
1782 const int positive;
1783 const int rolling;
1784 int count;
1785 {
1786 register int i, j;
1787
1788 if (leapcnt + (positive ? count : 1) > TZ_MAX_LEAPS) {
1789 error(_("too many leap seconds"));
1790 (void) exit(EXIT_FAILURE);
1791 }
1792 for (i = 0; i < leapcnt; ++i)
1793 if (t <= trans[i]) {
1794 if (t == trans[i]) {
1795 error(_("repeated leap second moment"));
1796 (void) exit(EXIT_FAILURE);
1797 }
1798 break;
1799 }
1800 do {
1801 for (j = leapcnt; j > i; --j) {
1802 trans[j] = trans[j - 1];
1803 corr[j] = corr[j - 1];
1804 roll[j] = roll[j - 1];
1805 }
1806 trans[i] = t;
1807 corr[i] = positive ? 1L : eitol(-count);
1808 roll[i] = rolling;
1809 ++leapcnt;
1810 } while (positive && --count != 0);
1811 }
1812
1813 static void
1814 adjleap P((void))
1815 {
1816 register int i;
1817 register long last = 0;
1818
1819 /*
1820 ** propagate leap seconds forward
1821 */
1822 for (i = 0; i < leapcnt; ++i) {
1823 trans[i] = tadd(trans[i], last);
1824 last = corr[i] += last;
1825 }
1826 }
1827
1828 static int
1829 yearistype(year, type)
1830 const int year;
1831 const char * const type;
1832 {
1833 static char * buf;
1834 int result;
1835
1836 if (type == NULL || *type == '\0')
1837 return TRUE;
1838 buf = erealloc(buf, (int) (132 + strlen(yitcommand) + strlen(type)));
1839 (void) sprintf(buf, "%s %d %s", yitcommand, year, type);
1840 result = system(buf);
1841 if (result == 0)
1842 return TRUE;
1843 if (result == (1 << 8))
1844 return FALSE;
1845 error(_("Wild result from command execution"));
1846 (void) fprintf(stderr, _("%s: command was '%s', result was %d\n"),
1847 progname, buf, result);
1848 for ( ; ; )
1849 (void) exit(EXIT_FAILURE);
1850 }
1851
1852 static int
1853 lowerit(a)
1854 int a;
1855 {
1856 a = (unsigned char) a;
1857 return (isascii(a) && isupper(a)) ? tolower(a) : a;
1858 }
1859
1860 static int
1861 ciequal(ap, bp) /* case-insensitive equality */
1862 register const char * ap;
1863 register const char * bp;
1864 {
1865 while (lowerit(*ap) == lowerit(*bp++))
1866 if (*ap++ == '\0')
1867 return TRUE;
1868 return FALSE;
1869 }
1870
1871 static int
1872 itsabbr(abbr, word)
1873 register const char * abbr;
1874 register const char * word;
1875 {
1876 if (lowerit(*abbr) != lowerit(*word))
1877 return FALSE;
1878 ++word;
1879 while (*++abbr != '\0')
1880 do {
1881 if (*word == '\0')
1882 return FALSE;
1883 } while (lowerit(*word++) != lowerit(*abbr));
1884 return TRUE;
1885 }
1886
1887 static const struct lookup *
1888 byword(word, table)
1889 register const char * const word;
1890 register const struct lookup * const table;
1891 {
1892 register const struct lookup * foundlp;
1893 register const struct lookup * lp;
1894
1895 if (word == NULL || table == NULL)
1896 return NULL;
1897 /*
1898 ** Look for exact match.
1899 */
1900 for (lp = table; lp->l_word != NULL; ++lp)
1901 if (ciequal(word, lp->l_word))
1902 return lp;
1903 /*
1904 ** Look for inexact match.
1905 */
1906 foundlp = NULL;
1907 for (lp = table; lp->l_word != NULL; ++lp)
1908 if (itsabbr(word, lp->l_word))
1909 if (foundlp == NULL)
1910 foundlp = lp;
1911 else return NULL; /* multiple inexact matches */
1912 return foundlp;
1913 }
1914
1915 static char **
1916 getfields(cp)
1917 register char * cp;
1918 {
1919 register char * dp;
1920 register char ** array;
1921 register int nsubs;
1922
1923 if (cp == NULL)
1924 return NULL;
1925 array = (char **) (void *)
1926 emalloc((int) ((strlen(cp) + 1) * sizeof *array));
1927 nsubs = 0;
1928 for ( ; ; ) {
1929 while (isascii(*cp) && isspace((unsigned char) *cp))
1930 ++cp;
1931 if (*cp == '\0' || *cp == '#')
1932 break;
1933 array[nsubs++] = dp = cp;
1934 do {
1935 if ((*dp = *cp++) != '"')
1936 ++dp;
1937 else while ((*dp = *cp++) != '"')
1938 if (*dp != '\0')
1939 ++dp;
1940 else error(_("Odd number of quotation marks"));
1941 } while (*cp != '\0' && *cp != '#' &&
1942 (!isascii(*cp) || !isspace((unsigned char) *cp)));
1943 if (isascii(*cp) && isspace((unsigned char) *cp))
1944 ++cp;
1945 *dp = '\0';
1946 }
1947 array[nsubs] = NULL;
1948 return array;
1949 }
1950
1951 static long
1952 oadd(t1, t2)
1953 const long t1;
1954 const long t2;
1955 {
1956 register long t;
1957
1958 t = t1 + t2;
1959 if ((t2 > 0 && t <= t1) || (t2 < 0 && t >= t1)) {
1960 error(_("time overflow"));
1961 (void) exit(EXIT_FAILURE);
1962 }
1963 return t;
1964 }
1965
1966 static time_t
1967 tadd(t1, t2)
1968 const time_t t1;
1969 const long t2;
1970 {
1971 register time_t t;
1972
1973 if (t1 == max_time && t2 > 0)
1974 return max_time;
1975 if (t1 == min_time && t2 < 0)
1976 return min_time;
1977 t = t1 + t2;
1978 if ((t2 > 0 && t <= t1) || (t2 < 0 && t >= t1)) {
1979 error(_("time overflow"));
1980 (void) exit(EXIT_FAILURE);
1981 }
1982 return t;
1983 }
1984
1985 /*
1986 ** Given a rule, and a year, compute the date - in seconds since January 1,
1987 ** 1970, 00:00 LOCAL time - in that year that the rule refers to.
1988 */
1989
1990 static time_t
1991 rpytime(rp, wantedy)
1992 register const struct rule * const rp;
1993 register const int wantedy;
1994 {
1995 register int y, m, i;
1996 register long dayoff; /* with a nod to Margaret O. */
1997 register time_t t;
1998
1999 if (wantedy == INT_MIN)
2000 return min_time;
2001 if (wantedy == INT_MAX)
2002 return max_time;
2003 dayoff = 0;
2004 m = TM_JANUARY;
2005 y = EPOCH_YEAR;
2006 while (wantedy != y) {
2007 if (wantedy > y) {
2008 i = len_years[isleap(y)];
2009 ++y;
2010 } else {
2011 --y;
2012 i = -len_years[isleap(y)];
2013 }
2014 dayoff = oadd(dayoff, eitol(i));
2015 }
2016 while (m != rp->r_month) {
2017 i = len_months[isleap(y)][m];
2018 dayoff = oadd(dayoff, eitol(i));
2019 ++m;
2020 }
2021 i = rp->r_dayofmonth;
2022 if (m == TM_FEBRUARY && i == 29 && !isleap(y)) {
2023 if (rp->r_dycode == DC_DOWLEQ)
2024 --i;
2025 else {
2026 error(_("use of 2/29 in non leap-year"));
2027 (void) exit(EXIT_FAILURE);
2028 }
2029 }
2030 --i;
2031 dayoff = oadd(dayoff, eitol(i));
2032 if (rp->r_dycode == DC_DOWGEQ || rp->r_dycode == DC_DOWLEQ) {
2033 register long wday;
2034
2035 #define LDAYSPERWEEK ((long) DAYSPERWEEK)
2036 wday = eitol(EPOCH_WDAY);
2037 /*
2038 ** Don't trust mod of negative numbers.
2039 */
2040 if (dayoff >= 0)
2041 wday = (wday + dayoff) % LDAYSPERWEEK;
2042 else {
2043 wday -= ((-dayoff) % LDAYSPERWEEK);
2044 if (wday < 0)
2045 wday += LDAYSPERWEEK;
2046 }
2047 while (wday != eitol(rp->r_wday))
2048 if (rp->r_dycode == DC_DOWGEQ) {
2049 dayoff = oadd(dayoff, (long) 1);
2050 if (++wday >= LDAYSPERWEEK)
2051 wday = 0;
2052 ++i;
2053 } else {
2054 dayoff = oadd(dayoff, (long) -1);
2055 if (--wday < 0)
2056 wday = LDAYSPERWEEK - 1;
2057 --i;
2058 }
2059 if (i < 0 || i >= len_months[isleap(y)][m]) {
2060 error(_("no day in month matches rule"));
2061 (void) exit(EXIT_FAILURE);
2062 }
2063 }
2064 if (dayoff < 0 && !TYPE_SIGNED(time_t))
2065 return min_time;
2066 t = (time_t) dayoff * SECSPERDAY;
2067 /*
2068 ** Cheap overflow check.
2069 */
2070 if (t / SECSPERDAY != dayoff)
2071 return (dayoff > 0) ? max_time : min_time;
2072 return tadd(t, rp->r_tod);
2073 }
2074
2075 static void
2076 newabbr(string)
2077 const char * const string;
2078 {
2079 register int i;
2080
2081 i = strlen(string) + 1;
2082 if (charcnt + i > TZ_MAX_CHARS) {
2083 error(_("too many, or too long, time zone abbreviations"));
2084 (void) exit(EXIT_FAILURE);
2085 }
2086 (void) strcpy(&chars[charcnt], string);
2087 charcnt += eitol(i);
2088 }
2089
2090 static int
2091 mkdirs(argname)
2092 char * const argname;
2093 {
2094 register char * name;
2095 register char * cp;
2096
2097 if (argname == NULL || *argname == '\0')
2098 return 0;
2099 cp = name = ecpyalloc(argname);
2100 while ((cp = strchr(cp + 1, '/')) != 0) {
2101 *cp = '\0';
2102 #ifndef unix
2103 /*
2104 ** DOS drive specifier?
2105 */
2106 if (isalpha((unsigned char) name[0]) &&
2107 name[1] == ':' && name[2] == '\0') {
2108 *cp = '/';
2109 continue;
2110 }
2111 #endif /* !defined unix */
2112 if (!itsdir(name)) {
2113 /*
2114 ** It doesn't seem to exist, so we try to create it.
2115 */
2116 if (mkdir(name, 0755) != 0) {
2117 const char *e = strerror(errno);
2118 (void) fprintf(stderr,
2119 _("%s: Can't create directory %s: %s\n"),
2120 progname, name, e);
2121 ifree(name);
2122 return -1;
2123 }
2124 }
2125 *cp = '/';
2126 }
2127 ifree(name);
2128 return 0;
2129 }
2130
2131 static long
2132 eitol(i)
2133 const int i;
2134 {
2135 long l;
2136
2137 l = i;
2138 if ((i < 0 && l >= 0) || (i == 0 && l != 0) || (i > 0 && l <= 0)) {
2139 (void) fprintf(stderr,
2140 _("%s: %d did not sign extend correctly\n"),
2141 progname, i);
2142 (void) exit(EXIT_FAILURE);
2143 }
2144 return l;
2145 }
2146
2147 /*
2148 ** UNIX was a registered trademark of UNIX System Laboratories in 1993.
2149 */
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