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(headers): Add netinet/inbits.h.
[glibc/history.git] / time / zic.c
blobc95887c9b4b945beee37829b929730b83e12aea0
1 #ifndef lint
2 #ifndef NOID
3 static char elsieid[] = "@(#)zic.c 7.87";
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 if (mkdirs(toname) != 0)
605 (void) exit(EXIT_FAILURE);
606 if (link(fromname, toname) != 0) {
607 const char *e = strerror(errno);
608
609 (void) fprintf(stderr,
610 _("%s: Can't link from %s to %s: %s\n"),
611 progname, fromname, toname, e);
612 (void) exit(EXIT_FAILURE);
613 }
614 }
615 ifree(fromname);
616 ifree(toname);
617 }
618
619 #ifndef INT_MAX
620 #define INT_MAX ((int) (((unsigned)~0)>>1))
621 #endif /* !defined INT_MAX */
622
623 #ifndef INT_MIN
624 #define INT_MIN ((int) ~(((unsigned)~0)>>1))
625 #endif /* !defined INT_MIN */
626
627 /*
628 ** The tz file format currently allows at most 32-bit quantities.
629 ** This restriction should be removed before signed 32-bit values
630 ** wrap around in 2038, but unfortunately this will require a
631 ** change to the tz file format.
632 */
633
634 #define MAX_BITS_IN_FILE 32
635 #define TIME_T_BITS_IN_FILE ((TYPE_BIT(time_t) < MAX_BITS_IN_FILE) ? TYPE_BIT(time_t) : MAX_BITS_IN_FILE)
636
637 static void
638 setboundaries P((void))
639 {
640 if (TYPE_SIGNED(time_t)) {
641 min_time = ~ (time_t) 0;
642 min_time <<= TIME_T_BITS_IN_FILE - 1;
643 max_time = ~ (time_t) 0 - min_time;
644 if (sflag)
645 min_time = 0;
646 } else {
647 min_time = 0;
648 max_time = 2 - sflag;
649 max_time <<= TIME_T_BITS_IN_FILE - 1;
650 --max_time;
651 }
652 min_year = TM_YEAR_BASE + gmtime(&min_time)->tm_year;
653 max_year = TM_YEAR_BASE + gmtime(&max_time)->tm_year;
654 min_year_representable = min_year;
655 max_year_representable = max_year;
656 }
657
658 static int
659 itsdir(name)
660 const char * const name;
661 {
662 register char * myname;
663 register int accres;
664
665 myname = ecpyalloc(name);
666 myname = ecatalloc(myname, "/.");
667 accres = access(myname, F_OK);
668 ifree(myname);
669 return accres == 0;
670 }
671
672 /*
673 ** Associate sets of rules with zones.
674 */
675
676 /*
677 ** Sort by rule name.
678 */
679
680 static int
681 rcomp(cp1, cp2)
682 const void * cp1;
683 const void * cp2;
684 {
685 return strcmp(((const struct rule *) cp1)->r_name,
686 ((const struct rule *) cp2)->r_name);
687 }
688
689 static void
690 associate P((void))
691 {
692 register struct zone * zp;
693 register struct rule * rp;
694 register int base, out;
695 register int i, j;
696
697 if (nrules != 0) {
698 (void) qsort((void *) rules, (size_t) nrules,
699 (size_t) sizeof *rules, rcomp);
700 for (i = 0; i < nrules - 1; ++i) {
701 if (strcmp(rules[i].r_name,
702 rules[i + 1].r_name) != 0)
703 continue;
704 if (strcmp(rules[i].r_filename,
705 rules[i + 1].r_filename) == 0)
706 continue;
707 eat(rules[i].r_filename, rules[i].r_linenum);
708 warning(_("same rule name in multiple files"));
709 eat(rules[i + 1].r_filename, rules[i + 1].r_linenum);
710 warning(_("same rule name in multiple files"));
711 for (j = i + 2; j < nrules; ++j) {
712 if (strcmp(rules[i].r_name,
713 rules[j].r_name) != 0)
714 break;
715 if (strcmp(rules[i].r_filename,
716 rules[j].r_filename) == 0)
717 continue;
718 if (strcmp(rules[i + 1].r_filename,
719 rules[j].r_filename) == 0)
720 continue;
721 break;
722 }
723 i = j - 1;
724 }
725 }
726 for (i = 0; i < nzones; ++i) {
727 zp = &zones[i];
728 zp->z_rules = NULL;
729 zp->z_nrules = 0;
730 }
731 for (base = 0; base < nrules; base = out) {
732 rp = &rules[base];
733 for (out = base + 1; out < nrules; ++out)
734 if (strcmp(rp->r_name, rules[out].r_name) != 0)
735 break;
736 for (i = 0; i < nzones; ++i) {
737 zp = &zones[i];
738 if (strcmp(zp->z_rule, rp->r_name) != 0)
739 continue;
740 zp->z_rules = rp;
741 zp->z_nrules = out - base;
742 }
743 }
744 for (i = 0; i < nzones; ++i) {
745 zp = &zones[i];
746 if (zp->z_nrules == 0) {
747 /*
748 ** Maybe we have a local standard time offset.
749 */
750 eat(zp->z_filename, zp->z_linenum);
751 zp->z_stdoff = gethms(zp->z_rule, _("unruly zone"),
752 TRUE);
753 /*
754 ** Note, though, that if there's no rule,
755 ** a '%s' in the format is a bad thing.
756 */
757 if (strchr(zp->z_format, '%') != 0)
758 error(_("%s in ruleless zone"));
759 }
760 }
761 if (errors)
762 (void) exit(EXIT_FAILURE);
763 }
764
765 static void
766 infile(name)
767 const char * name;
768 {
769 register FILE * fp;
770 register char ** fields;
771 register char * cp;
772 register const struct lookup * lp;
773 register int nfields;
774 register int wantcont;
775 register int num;
776 char buf[BUFSIZ];
777
778 if (strcmp(name, "-") == 0) {
779 name = _("standard input");
780 fp = stdin;
781 } else if ((fp = fopen(name, "r")) == NULL) {
782 const char *e = strerror(errno);
783
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
853 (void) fprintf(stderr, _("%s: Error closing %s: %s\n"),
854 progname, filename, e);
855 (void) exit(EXIT_FAILURE);
856 }
857 if (wantcont)
858 error(_("expected continuation line not found"));
859 }
860
861 /*
862 ** Convert a string of one of the forms
863 ** h -h hh:mm -hh:mm hh:mm:ss -hh:mm:ss
864 ** into a number of seconds.
865 ** A null string maps to zero.
866 ** Call error with errstring and return zero on errors.
867 */
868
869 static long
870 gethms(string, errstring, signable)
871 const char * string;
872 const char * const errstring;
873 const int signable;
874 {
875 int hh, mm, ss, sign;
876
877 if (string == NULL || *string == '\0')
878 return 0;
879 if (!signable)
880 sign = 1;
881 else if (*string == '-') {
882 sign = -1;
883 ++string;
884 } else sign = 1;
885 if (sscanf(string, scheck(string, "%d"), &hh) == 1)
886 mm = ss = 0;
887 else if (sscanf(string, scheck(string, "%d:%d"), &hh, &mm) == 2)
888 ss = 0;
889 else if (sscanf(string, scheck(string, "%d:%d:%d"),
890 &hh, &mm, &ss) != 3) {
891 error(errstring);
892 return 0;
893 }
894 if (hh < 0 || hh >= HOURSPERDAY ||
895 mm < 0 || mm >= MINSPERHOUR ||
896 ss < 0 || ss > SECSPERMIN) {
897 error(errstring);
898 return 0;
899 }
900 return eitol(sign) *
901 (eitol(hh * MINSPERHOUR + mm) *
902 eitol(SECSPERMIN) + eitol(ss));
903 }
904
905 static void
906 inrule(fields, nfields)
907 register char ** const fields;
908 const int nfields;
909 {
910 static struct rule r;
911
912 if (nfields != RULE_FIELDS) {
913 error(_("wrong number of fields on Rule line"));
914 return;
915 }
916 if (*fields[RF_NAME] == '\0') {
917 error(_("nameless rule"));
918 return;
919 }
920 r.r_filename = filename;
921 r.r_linenum = linenum;
922 r.r_stdoff = gethms(fields[RF_STDOFF], _("invalid saved time"), TRUE);
923 rulesub(&r, fields[RF_LOYEAR], fields[RF_HIYEAR], fields[RF_COMMAND],
924 fields[RF_MONTH], fields[RF_DAY], fields[RF_TOD]);
925 r.r_name = ecpyalloc(fields[RF_NAME]);
926 r.r_abbrvar = ecpyalloc(fields[RF_ABBRVAR]);
927 rules = (struct rule *) (void *) erealloc((char *) rules,
928 (int) ((nrules + 1) * sizeof *rules));
929 rules[nrules++] = r;
930 }
931
932 static int
933 inzone(fields, nfields)
934 register char ** const fields;
935 const int nfields;
936 {
937 register int i;
938 static char * buf;
939
940 if (nfields < ZONE_MINFIELDS || nfields > ZONE_MAXFIELDS) {
941 error(_("wrong number of fields on Zone line"));
942 return FALSE;
943 }
944 if (strcmp(fields[ZF_NAME], TZDEFAULT) == 0 && lcltime != NULL) {
945 buf = erealloc(buf, (int) (132 + strlen(TZDEFAULT)));
946 (void) sprintf(buf,
947 _("\"Zone %s\" line and -l option are mutually exclusive"),
948 TZDEFAULT);
949 error(buf);
950 return FALSE;
951 }
952 if (strcmp(fields[ZF_NAME], TZDEFRULES) == 0 && psxrules != NULL) {
953 buf = erealloc(buf, (int) (132 + strlen(TZDEFRULES)));
954 (void) sprintf(buf,
955 _("\"Zone %s\" line and -p option are mutually exclusive"),
956 TZDEFRULES);
957 error(buf);
958 return FALSE;
959 }
960 for (i = 0; i < nzones; ++i)
961 if (zones[i].z_name != NULL &&
962 strcmp(zones[i].z_name, fields[ZF_NAME]) == 0) {
963 buf = erealloc(buf, (int) (132 +
964 strlen(fields[ZF_NAME]) +
965 strlen(zones[i].z_filename)));
966 (void) sprintf(buf,
967 _("duplicate zone name %s (file \"%s\", line %d)"),
968 fields[ZF_NAME],
969 zones[i].z_filename,
970 zones[i].z_linenum);
971 error(buf);
972 return FALSE;
973 }
974 return inzsub(fields, nfields, FALSE);
975 }
976
977 static int
978 inzcont(fields, nfields)
979 register char ** const fields;
980 const int nfields;
981 {
982 if (nfields < ZONEC_MINFIELDS || nfields > ZONEC_MAXFIELDS) {
983 error(_("wrong number of fields on Zone continuation line"));
984 return FALSE;
985 }
986 return inzsub(fields, nfields, TRUE);
987 }
988
989 static int
990 inzsub(fields, nfields, iscont)
991 register char ** const fields;
992 const int nfields;
993 const int iscont;
994 {
995 register char * cp;
996 static struct zone z;
997 register int i_gmtoff, i_rule, i_format;
998 register int i_untilyear, i_untilmonth;
999 register int i_untilday, i_untiltime;
1000 register int hasuntil;
1001
1002 if (iscont) {
1003 i_gmtoff = ZFC_GMTOFF;
1004 i_rule = ZFC_RULE;
1005 i_format = ZFC_FORMAT;
1006 i_untilyear = ZFC_TILYEAR;
1007 i_untilmonth = ZFC_TILMONTH;
1008 i_untilday = ZFC_TILDAY;
1009 i_untiltime = ZFC_TILTIME;
1010 z.z_name = NULL;
1011 } else {
1012 i_gmtoff = ZF_GMTOFF;
1013 i_rule = ZF_RULE;
1014 i_format = ZF_FORMAT;
1015 i_untilyear = ZF_TILYEAR;
1016 i_untilmonth = ZF_TILMONTH;
1017 i_untilday = ZF_TILDAY;
1018 i_untiltime = ZF_TILTIME;
1019 z.z_name = ecpyalloc(fields[ZF_NAME]);
1020 }
1021 z.z_filename = filename;
1022 z.z_linenum = linenum;
1023 z.z_gmtoff = gethms(fields[i_gmtoff], _("invalid GMT offset"), TRUE);
1024 if ((cp = strchr(fields[i_format], '%')) != 0) {
1025 if (*++cp != 's' || strchr(cp, '%') != 0) {
1026 error(_("invalid abbreviation format"));
1027 return FALSE;
1028 }
1029 }
1030 z.z_rule = ecpyalloc(fields[i_rule]);
1031 z.z_format = ecpyalloc(fields[i_format]);
1032 hasuntil = nfields > i_untilyear;
1033 if (hasuntil) {
1034 z.z_untilrule.r_filename = filename;
1035 z.z_untilrule.r_linenum = linenum;
1036 rulesub(&z.z_untilrule,
1037 fields[i_untilyear],
1038 "only",
1039 "",
1040 (nfields > i_untilmonth) ?
1041 fields[i_untilmonth] : "Jan",
1042 (nfields > i_untilday) ? fields[i_untilday] : "1",
1043 (nfields > i_untiltime) ? fields[i_untiltime] : "0");
1044 z.z_untiltime = rpytime(&z.z_untilrule,
1045 z.z_untilrule.r_loyear);
1046 if (iscont && nzones > 0 &&
1047 z.z_untiltime > min_time &&
1048 z.z_untiltime < max_time &&
1049 zones[nzones - 1].z_untiltime > min_time &&
1050 zones[nzones - 1].z_untiltime < max_time &&
1051 zones[nzones - 1].z_untiltime >= z.z_untiltime) {
1052 error(_("Zone continuation line end time is not after end time of previous line"));
1053 return FALSE;
1054 }
1055 }
1056 zones = (struct zone *) (void *) erealloc((char *) zones,
1057 (int) ((nzones + 1) * sizeof *zones));
1058 zones[nzones++] = z;
1059 /*
1060 ** If there was an UNTIL field on this line,
1061 ** there's more information about the zone on the next line.
1062 */
1063 return hasuntil;
1064 }
1065
1066 static void
1067 inleap(fields, nfields)
1068 register char ** const fields;
1069 const int nfields;
1070 {
1071 register const char * cp;
1072 register const struct lookup * lp;
1073 register int i, j;
1074 int year, month, day;
1075 long dayoff, tod;
1076 time_t t;
1077
1078 if (nfields != LEAP_FIELDS) {
1079 error(_("wrong number of fields on Leap line"));
1080 return;
1081 }
1082 dayoff = 0;
1083 cp = fields[LP_YEAR];
1084 if (sscanf(cp, scheck(cp, "%d"), &year) != 1) {
1085 /*
1086 * Leapin' Lizards!
1087 */
1088 error(_("invalid leaping year"));
1089 return;
1090 }
1091 j = EPOCH_YEAR;
1092 while (j != year) {
1093 if (year > j) {
1094 i = len_years[isleap(j)];
1095 ++j;
1096 } else {
1097 --j;
1098 i = -len_years[isleap(j)];
1099 }
1100 dayoff = oadd(dayoff, eitol(i));
1101 }
1102 if ((lp = byword(fields[LP_MONTH], mon_names)) == NULL) {
1103 error(_("invalid month name"));
1104 return;
1105 }
1106 month = lp->l_value;
1107 j = TM_JANUARY;
1108 while (j != month) {
1109 i = len_months[isleap(year)][j];
1110 dayoff = oadd(dayoff, eitol(i));
1111 ++j;
1112 }
1113 cp = fields[LP_DAY];
1114 if (sscanf(cp, scheck(cp, "%d"), &day) != 1 ||
1115 day <= 0 || day > len_months[isleap(year)][month]) {
1116 error(_("invalid day of month"));
1117 return;
1118 }
1119 dayoff = oadd(dayoff, eitol(day - 1));
1120 if (dayoff < 0 && !TYPE_SIGNED(time_t)) {
1121 error(_("time before zero"));
1122 return;
1123 }
1124 t = (time_t) dayoff * SECSPERDAY;
1125 /*
1126 ** Cheap overflow check.
1127 */
1128 if (t / SECSPERDAY != dayoff) {
1129 error(_("time overflow"));
1130 return;
1131 }
1132 tod = gethms(fields[LP_TIME], _("invalid time of day"), FALSE);
1133 cp = fields[LP_CORR];
1134 {
1135 register int positive;
1136 int count;
1137
1138 if (strcmp(cp, "") == 0) { /* infile() turns "-" into "" */
1139 positive = FALSE;
1140 count = 1;
1141 } else if (strcmp(cp, "--") == 0) {
1142 positive = FALSE;
1143 count = 2;
1144 } else if (strcmp(cp, "+") == 0) {
1145 positive = TRUE;
1146 count = 1;
1147 } else if (strcmp(cp, "++") == 0) {
1148 positive = TRUE;
1149 count = 2;
1150 } else {
1151 error(_("illegal CORRECTION field on Leap line"));
1152 return;
1153 }
1154 if ((lp = byword(fields[LP_ROLL], leap_types)) == NULL) {
1155 error(_("illegal Rolling/Stationary field on Leap line"));
1156 return;
1157 }
1158 leapadd(tadd(t, tod), positive, lp->l_value, count);
1159 }
1160 }
1161
1162 static void
1163 inlink(fields, nfields)
1164 register char ** const fields;
1165 const int nfields;
1166 {
1167 struct link l;
1168
1169 if (nfields != LINK_FIELDS) {
1170 error(_("wrong number of fields on Link line"));
1171 return;
1172 }
1173 if (*fields[LF_FROM] == '\0') {
1174 error(_("blank FROM field on Link line"));
1175 return;
1176 }
1177 if (*fields[LF_TO] == '\0') {
1178 error(_("blank TO field on Link line"));
1179 return;
1180 }
1181 l.l_filename = filename;
1182 l.l_linenum = linenum;
1183 l.l_from = ecpyalloc(fields[LF_FROM]);
1184 l.l_to = ecpyalloc(fields[LF_TO]);
1185 links = (struct link *) (void *) erealloc((char *) links,
1186 (int) ((nlinks + 1) * sizeof *links));
1187 links[nlinks++] = l;
1188 }
1189
1190 static void
1191 rulesub(rp, loyearp, hiyearp, typep, monthp, dayp, timep)
1192 register struct rule * const rp;
1193 const char * const loyearp;
1194 const char * const hiyearp;
1195 const char * const typep;
1196 const char * const monthp;
1197 const char * const dayp;
1198 const char * const timep;
1199 {
1200 register const struct lookup * lp;
1201 register const char * cp;
1202 register char * dp;
1203 register char * ep;
1204
1205 if ((lp = byword(monthp, mon_names)) == NULL) {
1206 error(_("invalid month name"));
1207 return;
1208 }
1209 rp->r_month = lp->l_value;
1210 rp->r_todisstd = FALSE;
1211 rp->r_todisgmt = FALSE;
1212 dp = ecpyalloc(timep);
1213 if (*dp != '\0') {
1214 ep = dp + strlen(dp) - 1;
1215 switch (lowerit(*ep)) {
1216 case 's': /* Standard */
1217 rp->r_todisstd = TRUE;
1218 rp->r_todisgmt = FALSE;
1219 *ep = '\0';
1220 break;
1221 case 'w': /* Wall */
1222 rp->r_todisstd = FALSE;
1223 rp->r_todisgmt = FALSE;
1224 *ep = '\0';
1225 break;
1226 case 'g': /* Greenwich */
1227 case 'u': /* Universal */
1228 case 'z': /* Zulu */
1229 rp->r_todisstd = TRUE;
1230 rp->r_todisgmt = TRUE;
1231 *ep = '\0';
1232 break;
1233 }
1234 }
1235 rp->r_tod = gethms(dp, _("invalid time of day"), FALSE);
1236 ifree(dp);
1237 /*
1238 ** Year work.
1239 */
1240 cp = loyearp;
1241 lp = byword(cp, begin_years);
1242 if (lp != NULL) switch ((int) lp->l_value) {
1243 case YR_MINIMUM:
1244 rp->r_loyear = INT_MIN;
1245 break;
1246 case YR_MAXIMUM:
1247 rp->r_loyear = INT_MAX;
1248 break;
1249 default: /* "cannot happen" */
1250 (void) fprintf(stderr,
1251 _("%s: panic: Invalid l_value %d\n"),
1252 progname, lp->l_value);
1253 (void) exit(EXIT_FAILURE);
1254 } else if (sscanf(cp, scheck(cp, "%d"), &rp->r_loyear) != 1) {
1255 error(_("invalid starting year"));
1256 return;
1257 } else if (noise)
1258 if (rp->r_loyear < min_year_representable)
1259 warning(_("starting year too low to be represented"));
1260 else if (rp->r_loyear > max_year_representable)
1261 warning(_("starting year too high to be represented"));
1262 cp = hiyearp;
1263 if ((lp = byword(cp, end_years)) != NULL) switch ((int) lp->l_value) {
1264 case YR_MINIMUM:
1265 rp->r_hiyear = INT_MIN;
1266 break;
1267 case YR_MAXIMUM:
1268 rp->r_hiyear = INT_MAX;
1269 break;
1270 case YR_ONLY:
1271 rp->r_hiyear = rp->r_loyear;
1272 break;
1273 default: /* "cannot happen" */
1274 (void) fprintf(stderr,
1275 _("%s: panic: Invalid l_value %d\n"),
1276 progname, lp->l_value);
1277 (void) exit(EXIT_FAILURE);
1278 } else if (sscanf(cp, scheck(cp, "%d"), &rp->r_hiyear) != 1) {
1279 error(_("invalid ending year"));
1280 return;
1281 } else if (noise)
1282 if (rp->r_loyear < min_year_representable)
1283 warning(_("starting year too low to be represented"));
1284 else if (rp->r_loyear > max_year_representable)
1285 warning(_("starting year too high to be represented"));
1286 if (rp->r_loyear > rp->r_hiyear) {
1287 error(_("starting year greater than ending year"));
1288 return;
1289 }
1290 if (*typep == '\0')
1291 rp->r_yrtype = NULL;
1292 else {
1293 if (rp->r_loyear == rp->r_hiyear) {
1294 error(_("typed single year"));
1295 return;
1296 }
1297 rp->r_yrtype = ecpyalloc(typep);
1298 }
1299 if (rp->r_loyear < min_year && rp->r_loyear > 0)
1300 min_year = rp->r_loyear;
1301 /*
1302 ** Day work.
1303 ** Accept things such as:
1304 ** 1
1305 ** last-Sunday
1306 ** Sun<=20
1307 ** Sun>=7
1308 */
1309 dp = ecpyalloc(dayp);
1310 if ((lp = byword(dp, lasts)) != NULL) {
1311 rp->r_dycode = DC_DOWLEQ;
1312 rp->r_wday = lp->l_value;
1313 rp->r_dayofmonth = len_months[1][rp->r_month];
1314 } else {
1315 if ((ep = strchr(dp, '<')) != 0)
1316 rp->r_dycode = DC_DOWLEQ;
1317 else if ((ep = strchr(dp, '>')) != 0)
1318 rp->r_dycode = DC_DOWGEQ;
1319 else {
1320 ep = dp;
1321 rp->r_dycode = DC_DOM;
1322 }
1323 if (rp->r_dycode != DC_DOM) {
1324 *ep++ = 0;
1325 if (*ep++ != '=') {
1326 error(_("invalid day of month"));
1327 ifree(dp);
1328 return;
1329 }
1330 if ((lp = byword(dp, wday_names)) == NULL) {
1331 error(_("invalid weekday name"));
1332 ifree(dp);
1333 return;
1334 }
1335 rp->r_wday = lp->l_value;
1336 }
1337 if (sscanf(ep, scheck(ep, "%d"), &rp->r_dayofmonth) != 1 ||
1338 rp->r_dayofmonth <= 0 ||
1339 (rp->r_dayofmonth > len_months[1][rp->r_month])) {
1340 error(_("invalid day of month"));
1341 ifree(dp);
1342 return;
1343 }
1344 }
1345 ifree(dp);
1346 }
1347
1348 static void
1349 convert(val, buf)
1350 const long val;
1351 char * const buf;
1352 {
1353 register int i;
1354 register long shift;
1355
1356 for (i = 0, shift = 24; i < 4; ++i, shift -= 8)
1357 buf[i] = val >> shift;
1358 }
1359
1360 static void
1361 puttzcode(val, fp)
1362 const long val;
1363 FILE * const fp;
1364 {
1365 char buf[4];
1366
1367 convert(val, buf);
1368 (void) fwrite((void *) buf, (size_t) sizeof buf, (size_t) 1, fp);
1369 }
1370
1371 static int
1372 atcomp(avp, bvp)
1373 void * avp;
1374 void * bvp;
1375 {
1376 if (((struct attype *) avp)->at < ((struct attype *) bvp)->at)
1377 return -1;
1378 else if (((struct attype *) avp)->at > ((struct attype *) bvp)->at)
1379 return 1;
1380 else return 0;
1381 }
1382
1383 static void
1384 writezone(name)
1385 const char * const name;
1386 {
1387 register FILE * fp;
1388 register int i, j;
1389 static char * fullname;
1390 static struct tzhead tzh;
1391 time_t ats[TZ_MAX_TIMES];
1392 unsigned char types[TZ_MAX_TIMES];
1393
1394 /*
1395 ** Sort.
1396 */
1397 if (timecnt > 1)
1398 (void) qsort((void *) attypes, (size_t) timecnt,
1399 (size_t) sizeof *attypes, atcomp);
1400 /*
1401 ** Optimize.
1402 */
1403 {
1404 int fromi;
1405 int toi;
1406
1407 toi = 0;
1408 fromi = 0;
1409 while (fromi < timecnt && attypes[fromi].at < min_time)
1410 ++fromi;
1411 if (isdsts[0] == 0)
1412 while (fromi < timecnt && attypes[fromi].type == 0)
1413 ++fromi; /* handled by default rule */
1414 for ( ; fromi < timecnt; ++fromi) {
1415 if (toi != 0
1416 && ((attypes[fromi].at
1417 + gmtoffs[attypes[toi - 1].type])
1418 <= (attypes[toi - 1].at
1419 + gmtoffs[toi == 1 ? 0
1420 : attypes[toi - 2].type]))) {
1421 attypes[toi - 1].type = attypes[fromi].type;
1422 continue;
1423 }
1424 if (toi == 0 ||
1425 attypes[toi - 1].type != attypes[fromi].type)
1426 attypes[toi++] = attypes[fromi];
1427 }
1428 timecnt = toi;
1429 }
1430 /*
1431 ** Transfer.
1432 */
1433 for (i = 0; i < timecnt; ++i) {
1434 ats[i] = attypes[i].at;
1435 types[i] = attypes[i].type;
1436 }
1437 fullname = erealloc(fullname,
1438 (int) (strlen(directory) + 1 + strlen(name) + 1));
1439 (void) sprintf(fullname, "%s/%s", directory, name);
1440 /*
1441 ** Remove old file, if any, to snap links.
1442 */
1443 if (!itsdir(fullname) && remove(fullname) != 0 && errno != ENOENT) {
1444 const char *e = strerror(errno);
1445
1446 (void) fprintf(stderr, _("%s: Can't remove %s: %s\n"),
1447 progname, fullname, e);
1448 (void) exit(EXIT_FAILURE);
1449 }
1450 if ((fp = fopen(fullname, "wb")) == NULL) {
1451 if (mkdirs(fullname) != 0)
1452 (void) exit(EXIT_FAILURE);
1453 if ((fp = fopen(fullname, "wb")) == NULL) {
1454 const char *e = strerror(errno);
1455
1456 (void) fprintf(stderr, _("%s: Can't create %s: %s\n"),
1457 progname, fullname, e);
1458 (void) exit(EXIT_FAILURE);
1459 }
1460 }
1461 convert(eitol(typecnt), tzh.tzh_ttisgmtcnt);
1462 convert(eitol(typecnt), tzh.tzh_ttisstdcnt);
1463 convert(eitol(leapcnt), tzh.tzh_leapcnt);
1464 convert(eitol(timecnt), tzh.tzh_timecnt);
1465 convert(eitol(typecnt), tzh.tzh_typecnt);
1466 convert(eitol(charcnt), tzh.tzh_charcnt);
1467 #define DO(field) (void) fwrite((void *) tzh.field, (size_t) sizeof tzh.field, (size_t) 1, fp)
1468 DO(tzh_reserved);
1469 DO(tzh_ttisgmtcnt);
1470 DO(tzh_ttisstdcnt);
1471 DO(tzh_leapcnt);
1472 DO(tzh_timecnt);
1473 DO(tzh_typecnt);
1474 DO(tzh_charcnt);
1475 #undef DO
1476 for (i = 0; i < timecnt; ++i) {
1477 j = leapcnt;
1478 while (--j >= 0)
1479 if (ats[i] >= trans[j]) {
1480 ats[i] = tadd(ats[i], corr[j]);
1481 break;
1482 }
1483 puttzcode((long) ats[i], fp);
1484 }
1485 if (timecnt > 0)
1486 (void) fwrite((void *) types, (size_t) sizeof types[0],
1487 (size_t) timecnt, fp);
1488 for (i = 0; i < typecnt; ++i) {
1489 puttzcode((long) gmtoffs[i], fp);
1490 (void) putc(isdsts[i], fp);
1491 (void) putc(abbrinds[i], fp);
1492 }
1493 if (charcnt != 0)
1494 (void) fwrite((void *) chars, (size_t) sizeof chars[0],
1495 (size_t) charcnt, fp);
1496 for (i = 0; i < leapcnt; ++i) {
1497 if (roll[i]) {
1498 if (timecnt == 0 || trans[i] < ats[0]) {
1499 j = 0;
1500 while (isdsts[j])
1501 if (++j >= typecnt) {
1502 j = 0;
1503 break;
1504 }
1505 } else {
1506 j = 1;
1507 while (j < timecnt && trans[i] >= ats[j])
1508 ++j;
1509 j = types[j - 1];
1510 }
1511 puttzcode((long) tadd(trans[i], -gmtoffs[j]), fp);
1512 } else puttzcode((long) trans[i], fp);
1513 puttzcode((long) corr[i], fp);
1514 }
1515 for (i = 0; i < typecnt; ++i)
1516 (void) putc(ttisstds[i], fp);
1517 for (i = 0; i < typecnt; ++i)
1518 (void) putc(ttisgmts[i], fp);
1519 if (ferror(fp) || fclose(fp)) {
1520 (void) fprintf(stderr, _("%s: Error writing %s\n"),
1521 progname, fullname);
1522 (void) exit(EXIT_FAILURE);
1523 }
1524 }
1525
1526 static void
1527 doabbr(abbr, format, letters, isdst)
1528 char * const abbr;
1529 const char * const format;
1530 const char * const letters;
1531 const int isdst;
1532 {
1533 if (strchr(format, '/') == NULL) {
1534 if (letters == NULL)
1535 (void) strcpy(abbr, format);
1536 else (void) sprintf(abbr, format, letters);
1537 } else if (isdst)
1538 (void) strcpy(abbr, strchr(format, '/') + 1);
1539 else {
1540 (void) strcpy(abbr, format);
1541 *strchr(abbr, '/') = '\0';
1542 }
1543 }
1544
1545 static void
1546 outzone(zpfirst, zonecount)
1547 const struct zone * const zpfirst;
1548 const int zonecount;
1549 {
1550 register const struct zone * zp;
1551 register struct rule * rp;
1552 register int i, j;
1553 register int usestart, useuntil;
1554 register time_t starttime, untiltime;
1555 register long gmtoff;
1556 register long stdoff;
1557 register int year;
1558 register long startoff;
1559 register int startttisstd;
1560 register int startttisgmt;
1561 register int type;
1562 char startbuf[BUFSIZ];
1563
1564 INITIALIZE(untiltime);
1565 INITIALIZE(starttime);
1566 /*
1567 ** Now. . .finally. . .generate some useful data!
1568 */
1569 timecnt = 0;
1570 typecnt = 0;
1571 charcnt = 0;
1572 /*
1573 ** A guess that may well be corrected later.
1574 */
1575 stdoff = 0;
1576 /*
1577 ** Thanks to Earl Chew (earl@dnd.icp.nec.com.au)
1578 ** for noting the need to unconditionally initialize startttisstd.
1579 */
1580 startttisstd = FALSE;
1581 startttisgmt = FALSE;
1582 for (i = 0; i < zonecount; ++i) {
1583 zp = &zpfirst[i];
1584 usestart = i > 0 && (zp - 1)->z_untiltime > min_time;
1585 useuntil = i < (zonecount - 1);
1586 if (useuntil && zp->z_untiltime <= min_time)
1587 continue;
1588 gmtoff = zp->z_gmtoff;
1589 eat(zp->z_filename, zp->z_linenum);
1590 *startbuf = '\0';
1591 startoff = zp->z_gmtoff;
1592 if (zp->z_nrules == 0) {
1593 stdoff = zp->z_stdoff;
1594 doabbr(startbuf, zp->z_format,
1595 (char *) NULL, stdoff != 0);
1596 type = addtype(oadd(zp->z_gmtoff, stdoff),
1597 startbuf, stdoff != 0, startttisstd,
1598 startttisgmt);
1599 if (usestart) {
1600 addtt(starttime, type);
1601 usestart = FALSE;
1602 }
1603 else if (stdoff != 0)
1604 addtt(min_time, type);
1605 } else for (year = min_year; year <= max_year; ++year) {
1606 if (useuntil && year > zp->z_untilrule.r_hiyear)
1607 break;
1608 /*
1609 ** Mark which rules to do in the current year.
1610 ** For those to do, calculate rpytime(rp, year);
1611 */
1612 for (j = 0; j < zp->z_nrules; ++j) {
1613 rp = &zp->z_rules[j];
1614 eats(zp->z_filename, zp->z_linenum,
1615 rp->r_filename, rp->r_linenum);
1616 rp->r_todo = year >= rp->r_loyear &&
1617 year <= rp->r_hiyear &&
1618 yearistype(year, rp->r_yrtype);
1619 if (rp->r_todo)
1620 rp->r_temp = rpytime(rp, year);
1621 }
1622 for ( ; ; ) {
1623 register int k;
1624 register time_t jtime, ktime;
1625 register long offset;
1626 char buf[BUFSIZ];
1627
1628 INITIALIZE(ktime);
1629 if (useuntil) {
1630 /*
1631 ** Turn untiltime into GMT
1632 ** assuming the current gmtoff and
1633 ** stdoff values.
1634 */
1635 untiltime = zp->z_untiltime;
1636 if (!zp->z_untilrule.r_todisgmt)
1637 untiltime = tadd(untiltime,
1638 -gmtoff);
1639 if (!zp->z_untilrule.r_todisstd)
1640 untiltime = tadd(untiltime,
1641 -stdoff);
1642 }
1643 /*
1644 ** Find the rule (of those to do, if any)
1645 ** that takes effect earliest in the year.
1646 */
1647 k = -1;
1648 for (j = 0; j < zp->z_nrules; ++j) {
1649 rp = &zp->z_rules[j];
1650 if (!rp->r_todo)
1651 continue;
1652 eats(zp->z_filename, zp->z_linenum,
1653 rp->r_filename, rp->r_linenum);
1654 offset = rp->r_todisgmt ? 0 : gmtoff;
1655 if (!rp->r_todisstd)
1656 offset = oadd(offset, stdoff);
1657 jtime = rp->r_temp;
1658 if (jtime == min_time ||
1659 jtime == max_time)
1660 continue;
1661 jtime = tadd(jtime, -offset);
1662 if (k < 0 || jtime < ktime) {
1663 k = j;
1664 ktime = jtime;
1665 }
1666 }
1667 if (k < 0)
1668 break; /* go on to next year */
1669 rp = &zp->z_rules[k];
1670 rp->r_todo = FALSE;
1671 if (useuntil && ktime >= untiltime)
1672 break;
1673 stdoff = rp->r_stdoff;
1674 if (usestart && ktime == starttime)
1675 usestart = FALSE;
1676 if (usestart) {
1677 if (ktime < starttime) {
1678 startoff = oadd(zp->z_gmtoff,
1679 stdoff);
1680 doabbr(startbuf, zp->z_format,
1681 rp->r_abbrvar,
1682 rp->r_stdoff != 0);
1683 continue;
1684 }
1685 if (*startbuf == '\0' &&
1686 startoff == oadd(zp->z_gmtoff,
1687 stdoff)) {
1688 doabbr(startbuf, zp->z_format,
1689 rp->r_abbrvar,
1690 rp->r_stdoff != 0);
1691 }
1692 }
1693 eats(zp->z_filename, zp->z_linenum,
1694 rp->r_filename, rp->r_linenum);
1695 doabbr(buf, zp->z_format, rp->r_abbrvar,
1696 rp->r_stdoff != 0);
1697 offset = oadd(zp->z_gmtoff, rp->r_stdoff);
1698 type = addtype(offset, buf, rp->r_stdoff != 0,
1699 rp->r_todisstd, rp->r_todisgmt);
1700 addtt(ktime, type);
1701 }
1702 }
1703 if (usestart) {
1704 if (*startbuf == '\0' &&
1705 zp->z_format != NULL &&
1706 strchr(zp->z_format, '%') == NULL &&
1707 strchr(zp->z_format, '/') == NULL)
1708 (void) strcpy(startbuf, zp->z_format);
1709 eat(zp->z_filename, zp->z_linenum);
1710 if (*startbuf == '\0')
1711 error(_("can't determine time zone abbreviation to use just after until time"));
1712 else addtt(starttime,
1713 addtype(startoff, startbuf,
1714 startoff != zp->z_gmtoff,
1715 startttisstd,
1716 startttisgmt));
1717 }
1718 /*
1719 ** Now we may get to set starttime for the next zone line.
1720 */
1721 if (useuntil) {
1722 startttisstd = zp->z_untilrule.r_todisstd;
1723 startttisgmt = zp->z_untilrule.r_todisgmt;
1724 starttime = zp->z_untiltime;
1725 if (!startttisstd)
1726 starttime = tadd(starttime, -stdoff);
1727 if (!startttisgmt)
1728 starttime = tadd(starttime, -gmtoff);
1729 }
1730 }
1731 writezone(zpfirst->z_name);
1732 }
1733
1734 static void
1735 addtt(starttime, type)
1736 const time_t starttime;
1737 int type;
1738 {
1739 if (starttime <= min_time ||
1740 (timecnt == 1 && attypes[0].at < min_time)) {
1741 gmtoffs[0] = gmtoffs[type];
1742 isdsts[0] = isdsts[type];
1743 ttisstds[0] = ttisstds[type];
1744 ttisgmts[0] = ttisgmts[type];
1745 if (abbrinds[type] != 0)
1746 (void) strcpy(chars, &chars[abbrinds[type]]);
1747 abbrinds[0] = 0;
1748 charcnt = strlen(chars) + 1;
1749 typecnt = 1;
1750 timecnt = 0;
1751 type = 0;
1752 }
1753 if (timecnt >= TZ_MAX_TIMES) {
1754 error(_("too many transitions?!"));
1755 (void) exit(EXIT_FAILURE);
1756 }
1757 attypes[timecnt].at = starttime;
1758 attypes[timecnt].type = type;
1759 ++timecnt;
1760 }
1761
1762 static int
1763 addtype(gmtoff, abbr, isdst, ttisstd, ttisgmt)
1764 const long gmtoff;
1765 const char * const abbr;
1766 const int isdst;
1767 const int ttisstd;
1768 const int ttisgmt;
1769 {
1770 register int i, j;
1771
1772 if (isdst != TRUE && isdst != FALSE) {
1773 error(_("internal error - addtype called with bad isdst"));
1774 (void) exit(EXIT_FAILURE);
1775 }
1776 if (ttisstd != TRUE && ttisstd != FALSE) {
1777 error(_("internal error - addtype called with bad ttisstd"));
1778 (void) exit(EXIT_FAILURE);
1779 }
1780 if (ttisgmt != TRUE && ttisgmt != FALSE) {
1781 error(_("internal error - addtype called with bad ttisgmt"));
1782 (void) exit(EXIT_FAILURE);
1783 }
1784 /*
1785 ** See if there's already an entry for this zone type.
1786 ** If so, just return its index.
1787 */
1788 for (i = 0; i < typecnt; ++i) {
1789 if (gmtoff == gmtoffs[i] && isdst == isdsts[i] &&
1790 strcmp(abbr, &chars[abbrinds[i]]) == 0 &&
1791 ttisstd == ttisstds[i] &&
1792 ttisgmt == ttisgmts[i])
1793 return i;
1794 }
1795 /*
1796 ** There isn't one; add a new one, unless there are already too
1797 ** many.
1798 */
1799 if (typecnt >= TZ_MAX_TYPES) {
1800 error(_("too many local time types"));
1801 (void) exit(EXIT_FAILURE);
1802 }
1803 gmtoffs[i] = gmtoff;
1804 isdsts[i] = isdst;
1805 ttisstds[i] = ttisstd;
1806 ttisgmts[i] = ttisgmt;
1807
1808 for (j = 0; j < charcnt; ++j)
1809 if (strcmp(&chars[j], abbr) == 0)
1810 break;
1811 if (j == charcnt)
1812 newabbr(abbr);
1813 abbrinds[i] = j;
1814 ++typecnt;
1815 return i;
1816 }
1817
1818 static void
1819 leapadd(t, positive, rolling, count)
1820 const time_t t;
1821 const int positive;
1822 const int rolling;
1823 int count;
1824 {
1825 register int i, j;
1826
1827 if (leapcnt + (positive ? count : 1) > TZ_MAX_LEAPS) {
1828 error(_("too many leap seconds"));
1829 (void) exit(EXIT_FAILURE);
1830 }
1831 for (i = 0; i < leapcnt; ++i)
1832 if (t <= trans[i]) {
1833 if (t == trans[i]) {
1834 error(_("repeated leap second moment"));
1835 (void) exit(EXIT_FAILURE);
1836 }
1837 break;
1838 }
1839 do {
1840 for (j = leapcnt; j > i; --j) {
1841 trans[j] = trans[j - 1];
1842 corr[j] = corr[j - 1];
1843 roll[j] = roll[j - 1];
1844 }
1845 trans[i] = t;
1846 corr[i] = positive ? 1L : eitol(-count);
1847 roll[i] = rolling;
1848 ++leapcnt;
1849 } while (positive && --count != 0);
1850 }
1851
1852 static void
1853 adjleap P((void))
1854 {
1855 register int i;
1856 register long last = 0;
1857
1858 /*
1859 ** propagate leap seconds forward
1860 */
1861 for (i = 0; i < leapcnt; ++i) {
1862 trans[i] = tadd(trans[i], last);
1863 last = corr[i] += last;
1864 }
1865 }
1866
1867 static int
1868 yearistype(year, type)
1869 const int year;
1870 const char * const type;
1871 {
1872 static char * buf;
1873 int result;
1874
1875 if (type == NULL || *type == '\0')
1876 return TRUE;
1877 buf = erealloc(buf, (int) (132 + strlen(yitcommand) + strlen(type)));
1878 (void) sprintf(buf, "%s %d %s", yitcommand, year, type);
1879 result = system(buf);
1880 if (result == 0)
1881 return TRUE;
1882 if (result == (1 << 8))
1883 return FALSE;
1884 error(_("Wild result from command execution"));
1885 (void) fprintf(stderr, _("%s: command was '%s', result was %d\n"),
1886 progname, buf, result);
1887 for ( ; ; )
1888 (void) exit(EXIT_FAILURE);
1889 }
1890
1891 static int
1892 lowerit(a)
1893 int a;
1894 {
1895 a = (unsigned char) a;
1896 return (isascii(a) && isupper(a)) ? tolower(a) : a;
1897 }
1898
1899 static int
1900 ciequal(ap, bp) /* case-insensitive equality */
1901 register const char * ap;
1902 register const char * bp;
1903 {
1904 while (lowerit(*ap) == lowerit(*bp++))
1905 if (*ap++ == '\0')
1906 return TRUE;
1907 return FALSE;
1908 }
1909
1910 static int
1911 itsabbr(abbr, word)
1912 register const char * abbr;
1913 register const char * word;
1914 {
1915 if (lowerit(*abbr) != lowerit(*word))
1916 return FALSE;
1917 ++word;
1918 while (*++abbr != '\0')
1919 do {
1920 if (*word == '\0')
1921 return FALSE;
1922 } while (lowerit(*word++) != lowerit(*abbr));
1923 return TRUE;
1924 }
1925
1926 static const struct lookup *
1927 byword(word, table)
1928 register const char * const word;
1929 register const struct lookup * const table;
1930 {
1931 register const struct lookup * foundlp;
1932 register const struct lookup * lp;
1933
1934 if (word == NULL || table == NULL)
1935 return NULL;
1936 /*
1937 ** Look for exact match.
1938 */
1939 for (lp = table; lp->l_word != NULL; ++lp)
1940 if (ciequal(word, lp->l_word))
1941 return lp;
1942 /*
1943 ** Look for inexact match.
1944 */
1945 foundlp = NULL;
1946 for (lp = table; lp->l_word != NULL; ++lp)
1947 if (itsabbr(word, lp->l_word))
1948 if (foundlp == NULL)
1949 foundlp = lp;
1950 else return NULL; /* multiple inexact matches */
1951 return foundlp;
1952 }
1953
1954 static char **
1955 getfields(cp)
1956 register char * cp;
1957 {
1958 register char * dp;
1959 register char ** array;
1960 register int nsubs;
1961
1962 if (cp == NULL)
1963 return NULL;
1964 array = (char **) (void *)
1965 emalloc((int) ((strlen(cp) + 1) * sizeof *array));
1966 nsubs = 0;
1967 for ( ; ; ) {
1968 while (isascii(*cp) && isspace((unsigned char) *cp))
1969 ++cp;
1970 if (*cp == '\0' || *cp == '#')
1971 break;
1972 array[nsubs++] = dp = cp;
1973 do {
1974 if ((*dp = *cp++) != '"')
1975 ++dp;
1976 else while ((*dp = *cp++) != '"')
1977 if (*dp != '\0')
1978 ++dp;
1979 else error(_("Odd number of quotation marks"));
1980 } while (*cp != '\0' && *cp != '#' &&
1981 (!isascii(*cp) || !isspace((unsigned char) *cp)));
1982 if (isascii(*cp) && isspace((unsigned char) *cp))
1983 ++cp;
1984 *dp = '\0';
1985 }
1986 array[nsubs] = NULL;
1987 return array;
1988 }
1989
1990 static long
1991 oadd(t1, t2)
1992 const long t1;
1993 const long t2;
1994 {
1995 register long t;
1996
1997 t = t1 + t2;
1998 if ((t2 > 0 && t <= t1) || (t2 < 0 && t >= t1)) {
1999 error(_("time overflow"));
2000 (void) exit(EXIT_FAILURE);
2001 }
2002 return t;
2003 }
2004
2005 static time_t
2006 tadd(t1, t2)
2007 const time_t t1;
2008 const long t2;
2009 {
2010 register time_t t;
2011
2012 if (t1 == max_time && t2 > 0)
2013 return max_time;
2014 if (t1 == min_time && t2 < 0)
2015 return min_time;
2016 t = t1 + t2;
2017 if ((t2 > 0 && t <= t1) || (t2 < 0 && t >= t1)) {
2018 error(_("time overflow"));
2019 (void) exit(EXIT_FAILURE);
2020 }
2021 return t;
2022 }
2023
2024 /*
2025 ** Given a rule, and a year, compute the date - in seconds since January 1,
2026 ** 1970, 00:00 LOCAL time - in that year that the rule refers to.
2027 */
2028
2029 static time_t
2030 rpytime(rp, wantedy)
2031 register const struct rule * const rp;
2032 register const int wantedy;
2033 {
2034 register int y, m, i;
2035 register long dayoff; /* with a nod to Margaret O. */
2036 register time_t t;
2037
2038 if (wantedy == INT_MIN)
2039 return min_time;
2040 if (wantedy == INT_MAX)
2041 return max_time;
2042 dayoff = 0;
2043 m = TM_JANUARY;
2044 y = EPOCH_YEAR;
2045 while (wantedy != y) {
2046 if (wantedy > y) {
2047 i = len_years[isleap(y)];
2048 ++y;
2049 } else {
2050 --y;
2051 i = -len_years[isleap(y)];
2052 }
2053 dayoff = oadd(dayoff, eitol(i));
2054 }
2055 while (m != rp->r_month) {
2056 i = len_months[isleap(y)][m];
2057 dayoff = oadd(dayoff, eitol(i));
2058 ++m;
2059 }
2060 i = rp->r_dayofmonth;
2061 if (m == TM_FEBRUARY && i == 29 && !isleap(y)) {
2062 if (rp->r_dycode == DC_DOWLEQ)
2063 --i;
2064 else {
2065 error(_("use of 2/29 in non leap-year"));
2066 (void) exit(EXIT_FAILURE);
2067 }
2068 }
2069 --i;
2070 dayoff = oadd(dayoff, eitol(i));
2071 if (rp->r_dycode == DC_DOWGEQ || rp->r_dycode == DC_DOWLEQ) {
2072 register long wday;
2073
2074 #define LDAYSPERWEEK ((long) DAYSPERWEEK)
2075 wday = eitol(EPOCH_WDAY);
2076 /*
2077 ** Don't trust mod of negative numbers.
2078 */
2079 if (dayoff >= 0)
2080 wday = (wday + dayoff) % LDAYSPERWEEK;
2081 else {
2082 wday -= ((-dayoff) % LDAYSPERWEEK);
2083 if (wday < 0)
2084 wday += LDAYSPERWEEK;
2085 }
2086 while (wday != eitol(rp->r_wday))
2087 if (rp->r_dycode == DC_DOWGEQ) {
2088 dayoff = oadd(dayoff, (long) 1);
2089 if (++wday >= LDAYSPERWEEK)
2090 wday = 0;
2091 ++i;
2092 } else {
2093 dayoff = oadd(dayoff, (long) -1);
2094 if (--wday < 0)
2095 wday = LDAYSPERWEEK - 1;
2096 --i;
2097 }
2098 if (i < 0 || i >= len_months[isleap(y)][m]) {
2099 error(_("no day in month matches rule"));
2100 (void) exit(EXIT_FAILURE);
2101 }
2102 }
2103 if (dayoff < 0 && !TYPE_SIGNED(time_t))
2104 return min_time;
2105 t = (time_t) dayoff * SECSPERDAY;
2106 /*
2107 ** Cheap overflow check.
2108 */
2109 if (t / SECSPERDAY != dayoff)
2110 return (dayoff > 0) ? max_time : min_time;
2111 return tadd(t, rp->r_tod);
2112 }
2113
2114 static void
2115 newabbr(string)
2116 const char * const string;
2117 {
2118 register int i;
2119
2120 i = strlen(string) + 1;
2121 if (charcnt + i > TZ_MAX_CHARS) {
2122 error(_("too many, or too long, time zone abbreviations"));
2123 (void) exit(EXIT_FAILURE);
2124 }
2125 (void) strcpy(&chars[charcnt], string);
2126 charcnt += eitol(i);
2127 }
2128
2129 static int
2130 mkdirs(argname)
2131 char * const argname;
2132 {
2133 register char * name;
2134 register char * cp;
2135
2136 if (argname == NULL || *argname == '\0')
2137 return 0;
2138 cp = name = ecpyalloc(argname);
2139 while ((cp = strchr(cp + 1, '/')) != 0) {
2140 *cp = '\0';
2141 #ifndef unix
2142 /*
2143 ** DOS drive specifier?
2144 */
2145 if (isalpha((unsigned char) name[0]) &&
2146 name[1] == ':' && name[2] == '\0') {
2147 *cp = '/';
2148 continue;
2149 }
2150 #endif /* !defined unix */
2151 if (!itsdir(name)) {
2152 /*
2153 ** It doesn't seem to exist, so we try to create it.
2154 ** Creation may fail because of the directory being
2155 ** created by some other multiprocessor, so we get
2156 ** to do extra checking.
2157 */
2158 if (mkdir(name, S_IRUSR|S_IWUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH) != 0) {
2159 const char *e = strerror(errno);
2160
2161 if (errno != EEXIST || !itsdir(name)) {
2162 (void) fprintf(stderr,
2163 _("%s: Can't create directory %s: %s\n"),
2164 progname, name, e);
2165 ifree(name);
2166 return -1;
2167 }
2168 }
2169 }
2170 *cp = '/';
2171 }
2172 ifree(name);
2173 return 0;
2174 }
2175
2176 static long
2177 eitol(i)
2178 const int i;
2179 {
2180 long l;
2181
2182 l = i;
2183 if ((i < 0 && l >= 0) || (i == 0 && l != 0) || (i > 0 && l <= 0)) {
2184 (void) fprintf(stderr,
2185 _("%s: %d did not sign extend correctly\n"),
2186 progname, i);
2187 (void) exit(EXIT_FAILURE);
2188 }
2189 return l;
2190 }
2191
2192 /*
2193 ** UNIX was a registered trademark of UNIX System Laboratories in 1993.
2194 */
Unaltered CVS history