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update from main archive 970209
[glibc.git] / time / zic.c
blob2e07d791960235cbfd30708e69bf1077eebbd86f
1 #ifndef lint
2 #ifndef NOID
3 static char elsieid[] = "@(#)zic.c 7.81";
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 - 0)
140 static char * strerror P((int));
141 #endif /* !(HAVE_STRERROR - 0) */
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
363 (void) fprintf(stderr, _("%s: Memory exhausted: %s\n"),
364 progname, e);
365 (void) exit(EXIT_FAILURE);
366 }
367 return ptr;
368 }
369
370 #define emalloc(size) memcheck(imalloc(size))
371 #define erealloc(ptr, size) memcheck(irealloc((ptr), (size)))
372 #define ecpyalloc(ptr) memcheck(icpyalloc(ptr))
373 #define ecatalloc(oldp, newp) memcheck(icatalloc((oldp), (newp)))
374
375 /*
376 ** Error handling.
377 */
378
379 #if !(HAVE_STRERROR - 0)
380 static char *
381 strerror(errnum)
382 int errnum;
383 {
384 extern char * sys_errlist[];
385 extern int sys_nerr;
386
387 return (errnum > 0 && errnum <= sys_nerr) ?
388 sys_errlist[errnum] : "Unknown system error";
389 }
390 #endif /* !(HAVE_STRERROR - 0) */
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 && c != -1)
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
613 (void) fprintf(stderr,
614 _("%s: Can't link from %s to %s: %s\n"),
615 progname, fromname, toname, e);
616 (void) exit(EXIT_FAILURE);
617 }
618 }
619 ifree(fromname);
620 ifree(toname);
621 }
622
623 #ifndef INT_MAX
624 #define INT_MAX ((int) (((unsigned)~0)>>1))
625 #endif /* !defined INT_MAX */
626
627 #ifndef INT_MIN
628 #define INT_MIN ((int) ~(((unsigned)~0)>>1))
629 #endif /* !defined INT_MIN */
630
631 /*
632 ** The tz file format currently allows at most 32-bit quantities.
633 ** This restriction should be removed before signed 32-bit values
634 ** wrap around in 2038, but unfortunately this will require a
635 ** change to the tz file format.
636 */
637
638 #define MAX_BITS_IN_FILE 32
639 #define TIME_T_BITS_IN_FILE ((TYPE_BIT(time_t) < MAX_BITS_IN_FILE) ? TYPE_BIT(time_t) : MAX_BITS_IN_FILE)
640
641 static void
642 setboundaries P((void))
643 {
644 if (TYPE_SIGNED(time_t)) {
645 min_time = ~ (time_t) 0;
646 min_time <<= TIME_T_BITS_IN_FILE - 1;
647 max_time = ~ (time_t) 0 - min_time;
648 if (sflag)
649 min_time = 0;
650 } else {
651 min_time = 0;
652 max_time = 2 - sflag;
653 max_time <<= TIME_T_BITS_IN_FILE - 1;
654 --max_time;
655 }
656 min_year = TM_YEAR_BASE + gmtime(&min_time)->tm_year;
657 max_year = TM_YEAR_BASE + gmtime(&max_time)->tm_year;
658 }
659
660 static int
661 itsdir(name)
662 const char * const name;
663 {
664 register char * myname;
665 register int accres;
666
667 myname = ecpyalloc(name);
668 myname = ecatalloc(myname, "/.");
669 accres = access(myname, F_OK);
670 ifree(myname);
671 return accres == 0;
672 }
673
674 /*
675 ** Associate sets of rules with zones.
676 */
677
678 /*
679 ** Sort by rule name.
680 */
681
682 static int
683 rcomp(cp1, cp2)
684 const void * cp1;
685 const void * cp2;
686 {
687 return strcmp(((const struct rule *) cp1)->r_name,
688 ((const struct rule *) cp2)->r_name);
689 }
690
691 static void
692 associate P((void))
693 {
694 register struct zone * zp;
695 register struct rule * rp;
696 register int base, out;
697 register int i, j;
698
699 if (nrules != 0) {
700 (void) qsort((void *) rules, (size_t) nrules,
701 (size_t) sizeof *rules, rcomp);
702 for (i = 0; i < nrules - 1; ++i) {
703 if (strcmp(rules[i].r_name,
704 rules[i + 1].r_name) != 0)
705 continue;
706 if (strcmp(rules[i].r_filename,
707 rules[i + 1].r_filename) == 0)
708 continue;
709 eat(rules[i].r_filename, rules[i].r_linenum);
710 warning(_("same rule name in multiple files"));
711 eat(rules[i + 1].r_filename, rules[i + 1].r_linenum);
712 warning(_("same rule name in multiple files"));
713 for (j = i + 2; j < nrules; ++j) {
714 if (strcmp(rules[i].r_name,
715 rules[j].r_name) != 0)
716 break;
717 if (strcmp(rules[i].r_filename,
718 rules[j].r_filename) == 0)
719 continue;
720 if (strcmp(rules[i + 1].r_filename,
721 rules[j].r_filename) == 0)
722 continue;
723 break;
724 }
725 i = j - 1;
726 }
727 }
728 for (i = 0; i < nzones; ++i) {
729 zp = &zones[i];
730 zp->z_rules = NULL;
731 zp->z_nrules = 0;
732 }
733 for (base = 0; base < nrules; base = out) {
734 rp = &rules[base];
735 for (out = base + 1; out < nrules; ++out)
736 if (strcmp(rp->r_name, rules[out].r_name) != 0)
737 break;
738 for (i = 0; i < nzones; ++i) {
739 zp = &zones[i];
740 if (strcmp(zp->z_rule, rp->r_name) != 0)
741 continue;
742 zp->z_rules = rp;
743 zp->z_nrules = out - base;
744 }
745 }
746 for (i = 0; i < nzones; ++i) {
747 zp = &zones[i];
748 if (zp->z_nrules == 0) {
749 /*
750 ** Maybe we have a local standard time offset.
751 */
752 eat(zp->z_filename, zp->z_linenum);
753 zp->z_stdoff = gethms(zp->z_rule, _("unruly zone"),
754 TRUE);
755 /*
756 ** Note, though, that if there's no rule,
757 ** a '%s' in the format is a bad thing.
758 */
759 if (strchr(zp->z_format, '%') != 0)
760 error(_("%s in ruleless zone"));
761 }
762 }
763 if (errors)
764 (void) exit(EXIT_FAILURE);
765 }
766
767 static void
768 infile(name)
769 const char * name;
770 {
771 register FILE * fp;
772 register char ** fields;
773 register char * cp;
774 register const struct lookup * lp;
775 register int nfields;
776 register int wantcont;
777 register int num;
778 char buf[BUFSIZ];
779
780 if (strcmp(name, "-") == 0) {
781 name = _("standard input");
782 fp = stdin;
783 } else if ((fp = fopen(name, "r")) == NULL) {
784 const char *e = strerror(errno);
785
786 (void) fprintf(stderr, _("%s: Can't open %s: %s\n"),
787 progname, name, e);
788 (void) exit(EXIT_FAILURE);
789 }
790 wantcont = FALSE;
791 for (num = 1; ; ++num) {
792 eat(name, num);
793 if (fgets(buf, (int) sizeof buf, fp) != buf)
794 break;
795 cp = strchr(buf, '\n');
796 if (cp == NULL) {
797 error(_("line too long"));
798 (void) exit(EXIT_FAILURE);
799 }
800 *cp = '\0';
801 fields = getfields(buf);
802 nfields = 0;
803 while (fields[nfields] != NULL) {
804 static char nada;
805
806 if (strcmp(fields[nfields], "-") == 0)
807 fields[nfields] = &nada;
808 ++nfields;
809 }
810 if (nfields == 0) {
811 /* nothing to do */
812 } else if (wantcont) {
813 wantcont = inzcont(fields, nfields);
814 } else {
815 lp = byword(fields[0], line_codes);
816 if (lp == NULL)
817 error(_("input line of unknown type"));
818 else switch ((int) (lp->l_value)) {
819 case LC_RULE:
820 inrule(fields, nfields);
821 wantcont = FALSE;
822 break;
823 case LC_ZONE:
824 wantcont = inzone(fields, nfields);
825 break;
826 case LC_LINK:
827 inlink(fields, nfields);
828 wantcont = FALSE;
829 break;
830 case LC_LEAP:
831 if (name != leapsec)
832 (void) fprintf(stderr,
833 _("%s: Leap line in non leap seconds file %s\n"),
834 progname, name);
835 else inleap(fields, nfields);
836 wantcont = FALSE;
837 break;
838 default: /* "cannot happen" */
839 (void) fprintf(stderr,
840 _("%s: panic: Invalid l_value %d\n"),
841 progname, lp->l_value);
842 (void) exit(EXIT_FAILURE);
843 }
844 }
845 ifree((char *) fields);
846 }
847 if (ferror(fp)) {
848 (void) fprintf(stderr, _("%s: Error reading %s\n"),
849 progname, filename);
850 (void) exit(EXIT_FAILURE);
851 }
852 if (fp != stdin && fclose(fp)) {
853 const char *e = strerror(errno);
854
855 (void) fprintf(stderr, _("%s: Error closing %s: %s\n"),
856 progname, filename, e);
857 (void) exit(EXIT_FAILURE);
858 }
859 if (wantcont)
860 error(_("expected continuation line not found"));
861 }
862
863 /*
864 ** Convert a string of one of the forms
865 ** h -h hh:mm -hh:mm hh:mm:ss -hh:mm:ss
866 ** into a number of seconds.
867 ** A null string maps to zero.
868 ** Call error with errstring and return zero on errors.
869 */
870
871 static long
872 gethms(string, errstring, signable)
873 const char * string;
874 const char * const errstring;
875 const int signable;
876 {
877 int hh, mm, ss, sign;
878
879 if (string == NULL || *string == '\0')
880 return 0;
881 if (!signable)
882 sign = 1;
883 else if (*string == '-') {
884 sign = -1;
885 ++string;
886 } else sign = 1;
887 if (sscanf(string, scheck(string, "%d"), &hh) == 1)
888 mm = ss = 0;
889 else if (sscanf(string, scheck(string, "%d:%d"), &hh, &mm) == 2)
890 ss = 0;
891 else if (sscanf(string, scheck(string, "%d:%d:%d"),
892 &hh, &mm, &ss) != 3) {
893 error(errstring);
894 return 0;
895 }
896 if (hh < 0 || hh >= HOURSPERDAY ||
897 mm < 0 || mm >= MINSPERHOUR ||
898 ss < 0 || ss > SECSPERMIN) {
899 error(errstring);
900 return 0;
901 }
902 return eitol(sign) *
903 (eitol(hh * MINSPERHOUR + mm) *
904 eitol(SECSPERMIN) + eitol(ss));
905 }
906
907 static void
908 inrule(fields, nfields)
909 register char ** const fields;
910 const int nfields;
911 {
912 static struct rule r;
913
914 if (nfields != RULE_FIELDS) {
915 error(_("wrong number of fields on Rule line"));
916 return;
917 }
918 if (*fields[RF_NAME] == '\0') {
919 error(_("nameless rule"));
920 return;
921 }
922 r.r_filename = filename;
923 r.r_linenum = linenum;
924 r.r_stdoff = gethms(fields[RF_STDOFF], _("invalid saved time"), TRUE);
925 rulesub(&r, fields[RF_LOYEAR], fields[RF_HIYEAR], fields[RF_COMMAND],
926 fields[RF_MONTH], fields[RF_DAY], fields[RF_TOD]);
927 r.r_name = ecpyalloc(fields[RF_NAME]);
928 r.r_abbrvar = ecpyalloc(fields[RF_ABBRVAR]);
929 rules = (struct rule *) (void *) erealloc((char *) rules,
930 (int) ((nrules + 1) * sizeof *rules));
931 rules[nrules++] = r;
932 }
933
934 static int
935 inzone(fields, nfields)
936 register char ** const fields;
937 const int nfields;
938 {
939 register int i;
940 static char * buf;
941
942 if (nfields < ZONE_MINFIELDS || nfields > ZONE_MAXFIELDS) {
943 error(_("wrong number of fields on Zone line"));
944 return FALSE;
945 }
946 if (strcmp(fields[ZF_NAME], TZDEFAULT) == 0 && lcltime != NULL) {
947 buf = erealloc(buf, (int) (132 + strlen(TZDEFAULT)));
948 (void) sprintf(buf,
949 _("\"Zone %s\" line and -l option are mutually exclusive"),
950 TZDEFAULT);
951 error(buf);
952 return FALSE;
953 }
954 if (strcmp(fields[ZF_NAME], TZDEFRULES) == 0 && psxrules != NULL) {
955 buf = erealloc(buf, (int) (132 + strlen(TZDEFRULES)));
956 (void) sprintf(buf,
957 _("\"Zone %s\" line and -p option are mutually exclusive"),
958 TZDEFRULES);
959 error(buf);
960 return FALSE;
961 }
962 for (i = 0; i < nzones; ++i)
963 if (zones[i].z_name != NULL &&
964 strcmp(zones[i].z_name, fields[ZF_NAME]) == 0) {
965 buf = erealloc(buf, (int) (132 +
966 strlen(fields[ZF_NAME]) +
967 strlen(zones[i].z_filename)));
968 (void) sprintf(buf,
969 _("duplicate zone name %s (file \"%s\", line %d)"),
970 fields[ZF_NAME],
971 zones[i].z_filename,
972 zones[i].z_linenum);
973 error(buf);
974 return FALSE;
975 }
976 return inzsub(fields, nfields, FALSE);
977 }
978
979 static int
980 inzcont(fields, nfields)
981 register char ** const fields;
982 const int nfields;
983 {
984 if (nfields < ZONEC_MINFIELDS || nfields > ZONEC_MAXFIELDS) {
985 error(_("wrong number of fields on Zone continuation line"));
986 return FALSE;
987 }
988 return inzsub(fields, nfields, TRUE);
989 }
990
991 static int
992 inzsub(fields, nfields, iscont)
993 register char ** const fields;
994 const int nfields;
995 const int iscont;
996 {
997 register char * cp;
998 static struct zone z;
999 register int i_gmtoff, i_rule, i_format;
1000 register int i_untilyear, i_untilmonth;
1001 register int i_untilday, i_untiltime;
1002 register int hasuntil;
1003
1004 if (iscont) {
1005 i_gmtoff = ZFC_GMTOFF;
1006 i_rule = ZFC_RULE;
1007 i_format = ZFC_FORMAT;
1008 i_untilyear = ZFC_TILYEAR;
1009 i_untilmonth = ZFC_TILMONTH;
1010 i_untilday = ZFC_TILDAY;
1011 i_untiltime = ZFC_TILTIME;
1012 z.z_name = NULL;
1013 } else {
1014 i_gmtoff = ZF_GMTOFF;
1015 i_rule = ZF_RULE;
1016 i_format = ZF_FORMAT;
1017 i_untilyear = ZF_TILYEAR;
1018 i_untilmonth = ZF_TILMONTH;
1019 i_untilday = ZF_TILDAY;
1020 i_untiltime = ZF_TILTIME;
1021 z.z_name = ecpyalloc(fields[ZF_NAME]);
1022 }
1023 z.z_filename = filename;
1024 z.z_linenum = linenum;
1025 z.z_gmtoff = gethms(fields[i_gmtoff], _("invalid GMT offset"), TRUE);
1026 if ((cp = strchr(fields[i_format], '%')) != 0) {
1027 if (*++cp != 's' || strchr(cp, '%') != 0) {
1028 error(_("invalid abbreviation format"));
1029 return FALSE;
1030 }
1031 }
1032 z.z_rule = ecpyalloc(fields[i_rule]);
1033 z.z_format = ecpyalloc(fields[i_format]);
1034 hasuntil = nfields > i_untilyear;
1035 if (hasuntil) {
1036 z.z_untilrule.r_filename = filename;
1037 z.z_untilrule.r_linenum = linenum;
1038 rulesub(&z.z_untilrule,
1039 fields[i_untilyear],
1040 "only",
1041 "",
1042 (nfields > i_untilmonth) ?
1043 fields[i_untilmonth] : "Jan",
1044 (nfields > i_untilday) ? fields[i_untilday] : "1",
1045 (nfields > i_untiltime) ? fields[i_untiltime] : "0");
1046 z.z_untiltime = rpytime(&z.z_untilrule,
1047 z.z_untilrule.r_loyear);
1048 if (iscont && nzones > 0 &&
1049 z.z_untiltime > min_time &&
1050 z.z_untiltime < max_time &&
1051 zones[nzones - 1].z_untiltime > min_time &&
1052 zones[nzones - 1].z_untiltime < max_time &&
1053 zones[nzones - 1].z_untiltime >= z.z_untiltime) {
1054 error(_("Zone continuation line end time is not after end time of previous line"));
1055 return FALSE;
1056 }
1057 }
1058 zones = (struct zone *) (void *) erealloc((char *) zones,
1059 (int) ((nzones + 1) * sizeof *zones));
1060 zones[nzones++] = z;
1061 /*
1062 ** If there was an UNTIL field on this line,
1063 ** there's more information about the zone on the next line.
1064 */
1065 return hasuntil;
1066 }
1067
1068 static void
1069 inleap(fields, nfields)
1070 register char ** const fields;
1071 const int nfields;
1072 {
1073 register const char * cp;
1074 register const struct lookup * lp;
1075 register int i, j;
1076 int year, month, day;
1077 long dayoff, tod;
1078 time_t t;
1079
1080 if (nfields != LEAP_FIELDS) {
1081 error(_("wrong number of fields on Leap line"));
1082 return;
1083 }
1084 dayoff = 0;
1085 cp = fields[LP_YEAR];
1086 if (sscanf(cp, scheck(cp, "%d"), &year) != 1) {
1087 /*
1088 * Leapin' Lizards!
1089 */
1090 error(_("invalid leaping year"));
1091 return;
1092 }
1093 j = EPOCH_YEAR;
1094 while (j != year) {
1095 if (year > j) {
1096 i = len_years[isleap(j)];
1097 ++j;
1098 } else {
1099 --j;
1100 i = -len_years[isleap(j)];
1101 }
1102 dayoff = oadd(dayoff, eitol(i));
1103 }
1104 if ((lp = byword(fields[LP_MONTH], mon_names)) == NULL) {
1105 error(_("invalid month name"));
1106 return;
1107 }
1108 month = lp->l_value;
1109 j = TM_JANUARY;
1110 while (j != month) {
1111 i = len_months[isleap(year)][j];
1112 dayoff = oadd(dayoff, eitol(i));
1113 ++j;
1114 }
1115 cp = fields[LP_DAY];
1116 if (sscanf(cp, scheck(cp, "%d"), &day) != 1 ||
1117 day <= 0 || day > len_months[isleap(year)][month]) {
1118 error(_("invalid day of month"));
1119 return;
1120 }
1121 dayoff = oadd(dayoff, eitol(day - 1));
1122 if (dayoff < 0 && !TYPE_SIGNED(time_t)) {
1123 error(_("time before zero"));
1124 return;
1125 }
1126 t = (time_t) dayoff * SECSPERDAY;
1127 /*
1128 ** Cheap overflow check.
1129 */
1130 if (t / SECSPERDAY != dayoff) {
1131 error(_("time overflow"));
1132 return;
1133 }
1134 tod = gethms(fields[LP_TIME], _("invalid time of day"), FALSE);
1135 cp = fields[LP_CORR];
1136 {
1137 register int positive;
1138 int count;
1139
1140 if (strcmp(cp, "") == 0) { /* infile() turns "-" into "" */
1141 positive = FALSE;
1142 count = 1;
1143 } else if (strcmp(cp, "--") == 0) {
1144 positive = FALSE;
1145 count = 2;
1146 } else if (strcmp(cp, "+") == 0) {
1147 positive = TRUE;
1148 count = 1;
1149 } else if (strcmp(cp, "++") == 0) {
1150 positive = TRUE;
1151 count = 2;
1152 } else {
1153 error(_("illegal CORRECTION field on Leap line"));
1154 return;
1155 }
1156 if ((lp = byword(fields[LP_ROLL], leap_types)) == NULL) {
1157 error(_("illegal Rolling/Stationary field on Leap line"));
1158 return;
1159 }
1160 leapadd(tadd(t, tod), positive, lp->l_value, count);
1161 }
1162 }
1163
1164 static void
1165 inlink(fields, nfields)
1166 register char ** const fields;
1167 const int nfields;
1168 {
1169 struct link l;
1170
1171 if (nfields != LINK_FIELDS) {
1172 error(_("wrong number of fields on Link line"));
1173 return;
1174 }
1175 if (*fields[LF_FROM] == '\0') {
1176 error(_("blank FROM field on Link line"));
1177 return;
1178 }
1179 if (*fields[LF_TO] == '\0') {
1180 error(_("blank TO field on Link line"));
1181 return;
1182 }
1183 l.l_filename = filename;
1184 l.l_linenum = linenum;
1185 l.l_from = ecpyalloc(fields[LF_FROM]);
1186 l.l_to = ecpyalloc(fields[LF_TO]);
1187 links = (struct link *) (void *) erealloc((char *) links,
1188 (int) ((nlinks + 1) * sizeof *links));
1189 links[nlinks++] = l;
1190 }
1191
1192 static void
1193 rulesub(rp, loyearp, hiyearp, typep, monthp, dayp, timep)
1194 register struct rule * const rp;
1195 const char * const loyearp;
1196 const char * const hiyearp;
1197 const char * const typep;
1198 const char * const monthp;
1199 const char * const dayp;
1200 const char * const timep;
1201 {
1202 register const struct lookup * lp;
1203 register const char * cp;
1204 register char * dp;
1205 register char * ep;
1206
1207 if ((lp = byword(monthp, mon_names)) == NULL) {
1208 error(_("invalid month name"));
1209 return;
1210 }
1211 rp->r_month = lp->l_value;
1212 rp->r_todisstd = FALSE;
1213 rp->r_todisgmt = FALSE;
1214 dp = ecpyalloc(timep);
1215 if (*dp != '\0') {
1216 ep = dp + strlen(dp) - 1;
1217 switch (lowerit(*ep)) {
1218 case 's': /* Standard */
1219 rp->r_todisstd = TRUE;
1220 rp->r_todisgmt = FALSE;
1221 *ep = '\0';
1222 break;
1223 case 'w': /* Wall */
1224 rp->r_todisstd = FALSE;
1225 rp->r_todisgmt = FALSE;
1226 *ep = '\0';
1227 case 'g': /* Greenwich */
1228 case 'u': /* Universal */
1229 case 'z': /* Zulu */
1230 rp->r_todisstd = TRUE;
1231 rp->r_todisgmt = TRUE;
1232 *ep = '\0';
1233 break;
1234 }
1235 }
1236 rp->r_tod = gethms(dp, _("invalid time of day"), FALSE);
1237 ifree(dp);
1238 /*
1239 ** Year work.
1240 */
1241 cp = loyearp;
1242 lp = byword(cp, begin_years);
1243 if (lp != NULL) switch ((int) lp->l_value) {
1244 case YR_MINIMUM:
1245 rp->r_loyear = INT_MIN;
1246 break;
1247 case YR_MAXIMUM:
1248 rp->r_loyear = INT_MAX;
1249 break;
1250 default: /* "cannot happen" */
1251 (void) fprintf(stderr,
1252 _("%s: panic: Invalid l_value %d\n"),
1253 progname, lp->l_value);
1254 (void) exit(EXIT_FAILURE);
1255 } else if (sscanf(cp, scheck(cp, "%d"), &rp->r_loyear) != 1) {
1256 error(_("invalid starting year"));
1257 return;
1258 }
1259 cp = hiyearp;
1260 if ((lp = byword(cp, end_years)) != NULL) switch ((int) lp->l_value) {
1261 case YR_MINIMUM:
1262 rp->r_hiyear = INT_MIN;
1263 break;
1264 case YR_MAXIMUM:
1265 rp->r_hiyear = INT_MAX;
1266 break;
1267 case YR_ONLY:
1268 rp->r_hiyear = rp->r_loyear;
1269 break;
1270 default: /* "cannot happen" */
1271 (void) fprintf(stderr,
1272 _("%s: panic: Invalid l_value %d\n"),
1273 progname, lp->l_value);
1274 (void) exit(EXIT_FAILURE);
1275 } else if (sscanf(cp, scheck(cp, "%d"), &rp->r_hiyear) != 1) {
1276 error(_("invalid ending year"));
1277 return;
1278 }
1279 if (rp->r_loyear > rp->r_hiyear) {
1280 error(_("starting year greater than ending year"));
1281 return;
1282 }
1283 if (*typep == '\0')
1284 rp->r_yrtype = NULL;
1285 else {
1286 if (rp->r_loyear == rp->r_hiyear) {
1287 error(_("typed single year"));
1288 return;
1289 }
1290 rp->r_yrtype = ecpyalloc(typep);
1291 }
1292 /*
1293 ** Day work.
1294 ** Accept things such as:
1295 ** 1
1296 ** last-Sunday
1297 ** Sun<=20
1298 ** Sun>=7
1299 */
1300 dp = ecpyalloc(dayp);
1301 if ((lp = byword(dp, lasts)) != NULL) {
1302 rp->r_dycode = DC_DOWLEQ;
1303 rp->r_wday = lp->l_value;
1304 rp->r_dayofmonth = len_months[1][rp->r_month];
1305 } else {
1306 if ((ep = strchr(dp, '<')) != 0)
1307 rp->r_dycode = DC_DOWLEQ;
1308 else if ((ep = strchr(dp, '>')) != 0)
1309 rp->r_dycode = DC_DOWGEQ;
1310 else {
1311 ep = dp;
1312 rp->r_dycode = DC_DOM;
1313 }
1314 if (rp->r_dycode != DC_DOM) {
1315 *ep++ = 0;
1316 if (*ep++ != '=') {
1317 error(_("invalid day of month"));
1318 ifree(dp);
1319 return;
1320 }
1321 if ((lp = byword(dp, wday_names)) == NULL) {
1322 error(_("invalid weekday name"));
1323 ifree(dp);
1324 return;
1325 }
1326 rp->r_wday = lp->l_value;
1327 }
1328 if (sscanf(ep, scheck(ep, "%d"), &rp->r_dayofmonth) != 1 ||
1329 rp->r_dayofmonth <= 0 ||
1330 (rp->r_dayofmonth > len_months[1][rp->r_month])) {
1331 error(_("invalid day of month"));
1332 ifree(dp);
1333 return;
1334 }
1335 }
1336 ifree(dp);
1337 }
1338
1339 static void
1340 convert(val, buf)
1341 const long val;
1342 char * const buf;
1343 {
1344 register int i;
1345 register long shift;
1346
1347 for (i = 0, shift = 24; i < 4; ++i, shift -= 8)
1348 buf[i] = val >> shift;
1349 }
1350
1351 static void
1352 puttzcode(val, fp)
1353 const long val;
1354 FILE * const fp;
1355 {
1356 char buf[4];
1357
1358 convert(val, buf);
1359 (void) fwrite((void *) buf, (size_t) sizeof buf, (size_t) 1, fp);
1360 }
1361
1362 static int
1363 atcomp(avp, bvp)
1364 void * avp;
1365 void * bvp;
1366 {
1367 if (((struct attype *) avp)->at < ((struct attype *) bvp)->at)
1368 return -1;
1369 else if (((struct attype *) avp)->at > ((struct attype *) bvp)->at)
1370 return 1;
1371 else return 0;
1372 }
1373
1374 static void
1375 writezone(name)
1376 const char * const name;
1377 {
1378 register FILE * fp;
1379 register int i, j;
1380 static char * fullname;
1381 static struct tzhead tzh;
1382 time_t ats[TZ_MAX_TIMES];
1383 unsigned char types[TZ_MAX_TIMES];
1384
1385 /*
1386 ** Sort.
1387 */
1388 if (timecnt > 1)
1389 (void) qsort((void *) attypes, (size_t) timecnt,
1390 (size_t) sizeof *attypes, atcomp);
1391 /*
1392 ** Optimize.
1393 */
1394 {
1395 int fromi;
1396 int toi;
1397
1398 toi = 0;
1399 fromi = 0;
1400 if (isdsts[0] == 0)
1401 while (attypes[fromi].type == 0)
1402 ++fromi; /* handled by default rule */
1403 for ( ; fromi < timecnt; ++fromi) {
1404 if (toi != 0
1405 && ((attypes[fromi].at
1406 + gmtoffs[attypes[toi - 1].type])
1407 <= (attypes[toi - 1].at
1408 + gmtoffs[toi == 1 ? 0
1409 : attypes[toi - 2].type]))) {
1410 attypes[toi - 1].type = attypes[fromi].type;
1411 continue;
1412 }
1413 if (toi == 0 ||
1414 attypes[toi - 1].type != attypes[fromi].type)
1415 attypes[toi++] = attypes[fromi];
1416 }
1417 timecnt = toi;
1418 }
1419 /*
1420 ** Transfer.
1421 */
1422 for (i = 0; i < timecnt; ++i) {
1423 ats[i] = attypes[i].at;
1424 types[i] = attypes[i].type;
1425 }
1426 fullname = erealloc(fullname,
1427 (int) (strlen(directory) + 1 + strlen(name) + 1));
1428 (void) sprintf(fullname, "%s/%s", directory, name);
1429 /*
1430 ** Remove old file, if any, to snap links.
1431 */
1432 if (!itsdir(fullname) && remove(fullname) != 0 && errno != ENOENT) {
1433 const char *e = strerror(errno);
1434
1435 (void) fprintf(stderr, _("%s: Can't remove %s: %s\n"),
1436 progname, fullname, e);
1437 (void) exit(EXIT_FAILURE);
1438 }
1439 if ((fp = fopen(fullname, "wb")) == NULL) {
1440 if (mkdirs(fullname) != 0)
1441 (void) exit(EXIT_FAILURE);
1442 if ((fp = fopen(fullname, "wb")) == NULL) {
1443 const char *e = strerror(errno);
1444
1445 (void) fprintf(stderr, _("%s: Can't create %s: %s\n"),
1446 progname, fullname, e);
1447 (void) exit(EXIT_FAILURE);
1448 }
1449 }
1450 convert(eitol(typecnt), tzh.tzh_ttisgmtcnt);
1451 convert(eitol(typecnt), tzh.tzh_ttisstdcnt);
1452 convert(eitol(leapcnt), tzh.tzh_leapcnt);
1453 convert(eitol(timecnt), tzh.tzh_timecnt);
1454 convert(eitol(typecnt), tzh.tzh_typecnt);
1455 convert(eitol(charcnt), tzh.tzh_charcnt);
1456 #define DO(field) (void) fwrite((void *) tzh.field, (size_t) sizeof tzh.field, (size_t) 1, fp)
1457 DO(tzh_reserved);
1458 DO(tzh_ttisgmtcnt);
1459 DO(tzh_ttisstdcnt);
1460 DO(tzh_leapcnt);
1461 DO(tzh_timecnt);
1462 DO(tzh_typecnt);
1463 DO(tzh_charcnt);
1464 #undef DO
1465 for (i = 0; i < timecnt; ++i) {
1466 j = leapcnt;
1467 while (--j >= 0)
1468 if (ats[i] >= trans[j]) {
1469 ats[i] = tadd(ats[i], corr[j]);
1470 break;
1471 }
1472 puttzcode((long) ats[i], fp);
1473 }
1474 if (timecnt > 0)
1475 (void) fwrite((void *) types, (size_t) sizeof types[0],
1476 (size_t) timecnt, fp);
1477 for (i = 0; i < typecnt; ++i) {
1478 puttzcode((long) gmtoffs[i], fp);
1479 (void) putc(isdsts[i], fp);
1480 (void) putc(abbrinds[i], fp);
1481 }
1482 if (charcnt != 0)
1483 (void) fwrite((void *) chars, (size_t) sizeof chars[0],
1484 (size_t) charcnt, fp);
1485 for (i = 0; i < leapcnt; ++i) {
1486 if (roll[i]) {
1487 if (timecnt == 0 || trans[i] < ats[0]) {
1488 j = 0;
1489 while (isdsts[j])
1490 if (++j >= typecnt) {
1491 j = 0;
1492 break;
1493 }
1494 } else {
1495 j = 1;
1496 while (j < timecnt && trans[i] >= ats[j])
1497 ++j;
1498 j = types[j - 1];
1499 }
1500 puttzcode((long) tadd(trans[i], -gmtoffs[j]), fp);
1501 } else puttzcode((long) trans[i], fp);
1502 puttzcode((long) corr[i], fp);
1503 }
1504 for (i = 0; i < typecnt; ++i)
1505 (void) putc(ttisstds[i], fp);
1506 for (i = 0; i < typecnt; ++i)
1507 (void) putc(ttisgmts[i], fp);
1508 if (ferror(fp) || fclose(fp)) {
1509 (void) fprintf(stderr, _("%s: Error writing %s\n"),
1510 progname, fullname);
1511 (void) exit(EXIT_FAILURE);
1512 }
1513 }
1514
1515 static void
1516 doabbr(abbr, format, letters, isdst)
1517 char * const abbr;
1518 const char * const format;
1519 const char * const letters;
1520 const int isdst;
1521 {
1522 if (strchr(format, '/') == NULL) {
1523 if (letters == NULL)
1524 (void) strcpy(abbr, format);
1525 else (void) sprintf(abbr, format, letters);
1526 } else if (isdst)
1527 (void) strcpy(abbr, strchr(format, '/') + 1);
1528 else {
1529 (void) strcpy(abbr, format);
1530 *strchr(abbr, '/') = '\0';
1531 }
1532 }
1533
1534 static void
1535 outzone(zpfirst, zonecount)
1536 const struct zone * const zpfirst;
1537 const int zonecount;
1538 {
1539 register const struct zone * zp;
1540 register struct rule * rp;
1541 register int i, j;
1542 register int usestart, useuntil;
1543 register time_t starttime, untiltime;
1544 register long gmtoff;
1545 register long stdoff;
1546 register int year;
1547 register long startoff;
1548 register int startttisstd;
1549 register int startttisgmt;
1550 register int type;
1551 char startbuf[BUFSIZ];
1552
1553 INITIALIZE(untiltime);
1554 INITIALIZE(starttime);
1555 /*
1556 ** Now. . .finally. . .generate some useful data!
1557 */
1558 timecnt = 0;
1559 typecnt = 0;
1560 charcnt = 0;
1561 /*
1562 ** A guess that may well be corrected later.
1563 */
1564 stdoff = 0;
1565 /*
1566 ** Thanks to Earl Chew (earl@dnd.icp.nec.com.au)
1567 ** for noting the need to unconditionally initialize startttisstd.
1568 */
1569 startttisstd = FALSE;
1570 startttisgmt = FALSE;
1571 for (i = 0; i < zonecount; ++i) {
1572 zp = &zpfirst[i];
1573 usestart = i > 0 && (zp - 1)->z_untiltime > min_time;
1574 useuntil = i < (zonecount - 1);
1575 if (useuntil && zp->z_untiltime <= min_time)
1576 continue;
1577 gmtoff = zp->z_gmtoff;
1578 eat(zp->z_filename, zp->z_linenum);
1579 *startbuf = '\0';
1580 startoff = zp->z_gmtoff;
1581 if (zp->z_nrules == 0) {
1582 stdoff = zp->z_stdoff;
1583 doabbr(startbuf, zp->z_format,
1584 (char *) NULL, stdoff != 0);
1585 type = addtype(oadd(zp->z_gmtoff, stdoff),
1586 startbuf, stdoff != 0, startttisstd,
1587 startttisgmt);
1588 if (usestart) {
1589 addtt(starttime, type);
1590 usestart = FALSE;
1591 }
1592 else if (stdoff != 0)
1593 addtt(min_time, type);
1594 } else for (year = min_year; year <= max_year; ++year) {
1595 if (useuntil && year > zp->z_untilrule.r_hiyear)
1596 break;
1597 /*
1598 ** Mark which rules to do in the current year.
1599 ** For those to do, calculate rpytime(rp, year);
1600 */
1601 for (j = 0; j < zp->z_nrules; ++j) {
1602 rp = &zp->z_rules[j];
1603 eats(zp->z_filename, zp->z_linenum,
1604 rp->r_filename, rp->r_linenum);
1605 rp->r_todo = year >= rp->r_loyear &&
1606 year <= rp->r_hiyear &&
1607 yearistype(year, rp->r_yrtype);
1608 if (rp->r_todo)
1609 rp->r_temp = rpytime(rp, year);
1610 }
1611 for ( ; ; ) {
1612 register int k;
1613 register time_t jtime, ktime;
1614 register long offset;
1615 char buf[BUFSIZ];
1616
1617 INITIALIZE(ktime);
1618 if (useuntil) {
1619 /*
1620 ** Turn untiltime into GMT
1621 ** assuming the current gmtoff and
1622 ** stdoff values.
1623 */
1624 untiltime = zp->z_untiltime;
1625 if (!zp->z_untilrule.r_todisgmt)
1626 untiltime = tadd(untiltime,
1627 -gmtoff);
1628 if (!zp->z_untilrule.r_todisstd)
1629 untiltime = tadd(untiltime,
1630 -stdoff);
1631 }
1632 /*
1633 ** Find the rule (of those to do, if any)
1634 ** that takes effect earliest in the year.
1635 */
1636 k = -1;
1637 for (j = 0; j < zp->z_nrules; ++j) {
1638 rp = &zp->z_rules[j];
1639 if (!rp->r_todo)
1640 continue;
1641 eats(zp->z_filename, zp->z_linenum,
1642 rp->r_filename, rp->r_linenum);
1643 offset = rp->r_todisgmt ? 0 : gmtoff;
1644 if (!rp->r_todisstd)
1645 offset = oadd(offset, stdoff);
1646 jtime = rp->r_temp;
1647 if (jtime == min_time ||
1648 jtime == max_time)
1649 continue;
1650 jtime = tadd(jtime, -offset);
1651 if (k < 0 || jtime < ktime) {
1652 k = j;
1653 ktime = jtime;
1654 }
1655 }
1656 if (k < 0)
1657 break; /* go on to next year */
1658 rp = &zp->z_rules[k];
1659 rp->r_todo = FALSE;
1660 if (useuntil && ktime >= untiltime)
1661 break;
1662 stdoff = rp->r_stdoff;
1663 if (usestart && ktime == starttime)
1664 usestart = FALSE;
1665 if (usestart) {
1666 if (ktime < starttime) {
1667 startoff = oadd(zp->z_gmtoff,
1668 stdoff);
1669 doabbr(startbuf, zp->z_format,
1670 rp->r_abbrvar,
1671 rp->r_stdoff != 0);
1672 continue;
1673 }
1674 if (*startbuf == '\0' &&
1675 startoff == oadd(zp->z_gmtoff,
1676 stdoff)) {
1677 doabbr(startbuf, zp->z_format,
1678 rp->r_abbrvar,
1679 rp->r_stdoff != 0);
1680 }
1681 }
1682 eats(zp->z_filename, zp->z_linenum,
1683 rp->r_filename, rp->r_linenum);
1684 doabbr(buf, zp->z_format, rp->r_abbrvar,
1685 rp->r_stdoff != 0);
1686 offset = oadd(zp->z_gmtoff, rp->r_stdoff);
1687 type = addtype(offset, buf, rp->r_stdoff != 0,
1688 rp->r_todisstd, rp->r_todisgmt);
1689 addtt(ktime, type);
1690 }
1691 }
1692 if (usestart) {
1693 if (*startbuf == '\0' &&
1694 zp->z_format != NULL &&
1695 strchr(zp->z_format, '%') == NULL &&
1696 strchr(zp->z_format, '/') == NULL)
1697 (void) strcpy(startbuf, zp->z_format);
1698 eat(zp->z_filename, zp->z_linenum);
1699 if (*startbuf == '\0')
1700 error(_("can't determine time zone abbreviation to use just after until time"));
1701 else addtt(starttime,
1702 addtype(startoff, startbuf,
1703 startoff != zp->z_gmtoff,
1704 startttisstd,
1705 startttisgmt));
1706 }
1707 /*
1708 ** Now we may get to set starttime for the next zone line.
1709 */
1710 if (useuntil) {
1711 startttisstd = zp->z_untilrule.r_todisstd;
1712 startttisgmt = zp->z_untilrule.r_todisgmt;
1713 starttime = zp->z_untiltime;
1714 if (!startttisstd)
1715 starttime = tadd(starttime, -stdoff);
1716 if (!startttisgmt)
1717 starttime = tadd(starttime, -gmtoff);
1718 }
1719 }
1720 writezone(zpfirst->z_name);
1721 }
1722
1723 static void
1724 addtt(starttime, type)
1725 const time_t starttime;
1726 const int type;
1727 {
1728 if (timecnt >= TZ_MAX_TIMES) {
1729 error(_("too many transitions?!"));
1730 (void) exit(EXIT_FAILURE);
1731 }
1732 attypes[timecnt].at = starttime;
1733 attypes[timecnt].type = type;
1734 ++timecnt;
1735 }
1736
1737 static int
1738 addtype(gmtoff, abbr, isdst, ttisstd, ttisgmt)
1739 const long gmtoff;
1740 const char * const abbr;
1741 const int isdst;
1742 const int ttisstd;
1743 const int ttisgmt;
1744 {
1745 register int i, j;
1746
1747 if (isdst != TRUE && isdst != FALSE) {
1748 error(_("internal error - addtype called with bad isdst"));
1749 (void) exit(EXIT_FAILURE);
1750 }
1751 if (ttisstd != TRUE && ttisstd != FALSE) {
1752 error(_("internal error - addtype called with bad ttisstd"));
1753 (void) exit(EXIT_FAILURE);
1754 }
1755 if (ttisgmt != TRUE && ttisgmt != FALSE) {
1756 error(_("internal error - addtype called with bad ttisgmt"));
1757 (void) exit(EXIT_FAILURE);
1758 }
1759 /*
1760 ** See if there's already an entry for this zone type.
1761 ** If so, just return its index.
1762 */
1763 for (i = 0; i < typecnt; ++i) {
1764 if (gmtoff == gmtoffs[i] && isdst == isdsts[i] &&
1765 strcmp(abbr, &chars[abbrinds[i]]) == 0 &&
1766 ttisstd == ttisstds[i] &&
1767 ttisgmt == ttisgmts[i])
1768 return i;
1769 }
1770 /*
1771 ** There isn't one; add a new one, unless there are already too
1772 ** many.
1773 */
1774 if (typecnt >= TZ_MAX_TYPES) {
1775 error(_("too many local time types"));
1776 (void) exit(EXIT_FAILURE);
1777 }
1778 gmtoffs[i] = gmtoff;
1779 isdsts[i] = isdst;
1780 ttisstds[i] = ttisstd;
1781 ttisgmts[i] = ttisgmt;
1782
1783 for (j = 0; j < charcnt; ++j)
1784 if (strcmp(&chars[j], abbr) == 0)
1785 break;
1786 if (j == charcnt)
1787 newabbr(abbr);
1788 abbrinds[i] = j;
1789 ++typecnt;
1790 return i;
1791 }
1792
1793 static void
1794 leapadd(t, positive, rolling, count)
1795 const time_t t;
1796 const int positive;
1797 const int rolling;
1798 int count;
1799 {
1800 register int i, j;
1801
1802 if (leapcnt + (positive ? count : 1) > TZ_MAX_LEAPS) {
1803 error(_("too many leap seconds"));
1804 (void) exit(EXIT_FAILURE);
1805 }
1806 for (i = 0; i < leapcnt; ++i)
1807 if (t <= trans[i]) {
1808 if (t == trans[i]) {
1809 error(_("repeated leap second moment"));
1810 (void) exit(EXIT_FAILURE);
1811 }
1812 break;
1813 }
1814 do {
1815 for (j = leapcnt; j > i; --j) {
1816 trans[j] = trans[j - 1];
1817 corr[j] = corr[j - 1];
1818 roll[j] = roll[j - 1];
1819 }
1820 trans[i] = t;
1821 corr[i] = positive ? 1L : eitol(-count);
1822 roll[i] = rolling;
1823 ++leapcnt;
1824 } while (positive && --count != 0);
1825 }
1826
1827 static void
1828 adjleap P((void))
1829 {
1830 register int i;
1831 register long last = 0;
1832
1833 /*
1834 ** propagate leap seconds forward
1835 */
1836 for (i = 0; i < leapcnt; ++i) {
1837 trans[i] = tadd(trans[i], last);
1838 last = corr[i] += last;
1839 }
1840 }
1841
1842 static int
1843 yearistype(year, type)
1844 const int year;
1845 const char * const type;
1846 {
1847 static char * buf;
1848 int result;
1849
1850 if (type == NULL || *type == '\0')
1851 return TRUE;
1852 buf = erealloc(buf, (int) (132 + strlen(yitcommand) + strlen(type)));
1853 (void) sprintf(buf, "%s %d %s", yitcommand, year, type);
1854 result = system(buf);
1855 if (result == 0)
1856 return TRUE;
1857 if (result == (1 << 8))
1858 return FALSE;
1859 error(_("Wild result from command execution"));
1860 (void) fprintf(stderr, _("%s: command was '%s', result was %d\n"),
1861 progname, buf, result);
1862 for ( ; ; )
1863 (void) exit(EXIT_FAILURE);
1864 }
1865
1866 static int
1867 lowerit(a)
1868 int a;
1869 {
1870 a = (unsigned char) a;
1871 return (isascii(a) && isupper(a)) ? tolower(a) : a;
1872 }
1873
1874 static int
1875 ciequal(ap, bp) /* case-insensitive equality */
1876 register const char * ap;
1877 register const char * bp;
1878 {
1879 while (lowerit(*ap) == lowerit(*bp++))
1880 if (*ap++ == '\0')
1881 return TRUE;
1882 return FALSE;
1883 }
1884
1885 static int
1886 itsabbr(abbr, word)
1887 register const char * abbr;
1888 register const char * word;
1889 {
1890 if (lowerit(*abbr) != lowerit(*word))
1891 return FALSE;
1892 ++word;
1893 while (*++abbr != '\0')
1894 do {
1895 if (*word == '\0')
1896 return FALSE;
1897 } while (lowerit(*word++) != lowerit(*abbr));
1898 return TRUE;
1899 }
1900
1901 static const struct lookup *
1902 byword(word, table)
1903 register const char * const word;
1904 register const struct lookup * const table;
1905 {
1906 register const struct lookup * foundlp;
1907 register const struct lookup * lp;
1908
1909 if (word == NULL || table == NULL)
1910 return NULL;
1911 /*
1912 ** Look for exact match.
1913 */
1914 for (lp = table; lp->l_word != NULL; ++lp)
1915 if (ciequal(word, lp->l_word))
1916 return lp;
1917 /*
1918 ** Look for inexact match.
1919 */
1920 foundlp = NULL;
1921 for (lp = table; lp->l_word != NULL; ++lp)
1922 if (itsabbr(word, lp->l_word))
1923 if (foundlp == NULL)
1924 foundlp = lp;
1925 else return NULL; /* multiple inexact matches */
1926 return foundlp;
1927 }
1928
1929 static char **
1930 getfields(cp)
1931 register char * cp;
1932 {
1933 register char * dp;
1934 register char ** array;
1935 register int nsubs;
1936
1937 if (cp == NULL)
1938 return NULL;
1939 array = (char **) (void *)
1940 emalloc((int) ((strlen(cp) + 1) * sizeof *array));
1941 nsubs = 0;
1942 for ( ; ; ) {
1943 while (isascii(*cp) && isspace((unsigned char) *cp))
1944 ++cp;
1945 if (*cp == '\0' || *cp == '#')
1946 break;
1947 array[nsubs++] = dp = cp;
1948 do {
1949 if ((*dp = *cp++) != '"')
1950 ++dp;
1951 else while ((*dp = *cp++) != '"')
1952 if (*dp != '\0')
1953 ++dp;
1954 else error(_("Odd number of quotation marks"));
1955 } while (*cp != '\0' && *cp != '#' &&
1956 (!isascii(*cp) || !isspace((unsigned char) *cp)));
1957 if (isascii(*cp) && isspace((unsigned char) *cp))
1958 ++cp;
1959 *dp = '\0';
1960 }
1961 array[nsubs] = NULL;
1962 return array;
1963 }
1964
1965 static long
1966 oadd(t1, t2)
1967 const long t1;
1968 const long t2;
1969 {
1970 register long t;
1971
1972 t = t1 + t2;
1973 if ((t2 > 0 && t <= t1) || (t2 < 0 && t >= t1)) {
1974 error(_("time overflow"));
1975 (void) exit(EXIT_FAILURE);
1976 }
1977 return t;
1978 }
1979
1980 static time_t
1981 tadd(t1, t2)
1982 const time_t t1;
1983 const long t2;
1984 {
1985 register time_t t;
1986
1987 if (t1 == max_time && t2 > 0)
1988 return max_time;
1989 if (t1 == min_time && t2 < 0)
1990 return min_time;
1991 t = t1 + t2;
1992 if ((t2 > 0 && t <= t1) || (t2 < 0 && t >= t1)) {
1993 error(_("time overflow"));
1994 (void) exit(EXIT_FAILURE);
1995 }
1996 return t;
1997 }
1998
1999 /*
2000 ** Given a rule, and a year, compute the date - in seconds since January 1,
2001 ** 1970, 00:00 LOCAL time - in that year that the rule refers to.
2002 */
2003
2004 static time_t
2005 rpytime(rp, wantedy)
2006 register const struct rule * const rp;
2007 register const int wantedy;
2008 {
2009 register int y, m, i;
2010 register long dayoff; /* with a nod to Margaret O. */
2011 register time_t t;
2012
2013 if (wantedy == INT_MIN)
2014 return min_time;
2015 if (wantedy == INT_MAX)
2016 return max_time;
2017 dayoff = 0;
2018 m = TM_JANUARY;
2019 y = EPOCH_YEAR;
2020 while (wantedy != y) {
2021 if (wantedy > y) {
2022 i = len_years[isleap(y)];
2023 ++y;
2024 } else {
2025 --y;
2026 i = -len_years[isleap(y)];
2027 }
2028 dayoff = oadd(dayoff, eitol(i));
2029 }
2030 while (m != rp->r_month) {
2031 i = len_months[isleap(y)][m];
2032 dayoff = oadd(dayoff, eitol(i));
2033 ++m;
2034 }
2035 i = rp->r_dayofmonth;
2036 if (m == TM_FEBRUARY && i == 29 && !isleap(y)) {
2037 if (rp->r_dycode == DC_DOWLEQ)
2038 --i;
2039 else {
2040 error(_("use of 2/29 in non leap-year"));
2041 (void) exit(EXIT_FAILURE);
2042 }
2043 }
2044 --i;
2045 dayoff = oadd(dayoff, eitol(i));
2046 if (rp->r_dycode == DC_DOWGEQ || rp->r_dycode == DC_DOWLEQ) {
2047 register long wday;
2048
2049 #define LDAYSPERWEEK ((long) DAYSPERWEEK)
2050 wday = eitol(EPOCH_WDAY);
2051 /*
2052 ** Don't trust mod of negative numbers.
2053 */
2054 if (dayoff >= 0)
2055 wday = (wday + dayoff) % LDAYSPERWEEK;
2056 else {
2057 wday -= ((-dayoff) % LDAYSPERWEEK);
2058 if (wday < 0)
2059 wday += LDAYSPERWEEK;
2060 }
2061 while (wday != eitol(rp->r_wday))
2062 if (rp->r_dycode == DC_DOWGEQ) {
2063 dayoff = oadd(dayoff, (long) 1);
2064 if (++wday >= LDAYSPERWEEK)
2065 wday = 0;
2066 ++i;
2067 } else {
2068 dayoff = oadd(dayoff, (long) -1);
2069 if (--wday < 0)
2070 wday = LDAYSPERWEEK - 1;
2071 --i;
2072 }
2073 if (i < 0 || i >= len_months[isleap(y)][m]) {
2074 error(_("no day in month matches rule"));
2075 (void) exit(EXIT_FAILURE);
2076 }
2077 }
2078 if (dayoff < 0 && !TYPE_SIGNED(time_t))
2079 return min_time;
2080 t = (time_t) dayoff * SECSPERDAY;
2081 /*
2082 ** Cheap overflow check.
2083 */
2084 if (t / SECSPERDAY != dayoff)
2085 return (dayoff > 0) ? max_time : min_time;
2086 return tadd(t, rp->r_tod);
2087 }
2088
2089 static void
2090 newabbr(string)
2091 const char * const string;
2092 {
2093 register int i;
2094
2095 i = strlen(string) + 1;
2096 if (charcnt + i > TZ_MAX_CHARS) {
2097 error(_("too many, or too long, time zone abbreviations"));
2098 (void) exit(EXIT_FAILURE);
2099 }
2100 (void) strcpy(&chars[charcnt], string);
2101 charcnt += eitol(i);
2102 }
2103
2104 static int
2105 mkdirs(argname)
2106 char * const argname;
2107 {
2108 register char * name;
2109 register char * cp;
2110
2111 if (argname == NULL || *argname == '\0')
2112 return 0;
2113 cp = name = ecpyalloc(argname);
2114 while ((cp = strchr(cp + 1, '/')) != 0) {
2115 *cp = '\0';
2116 #ifndef unix
2117 /*
2118 ** DOS drive specifier?
2119 */
2120 if (isalpha((unsigned char) name[0]) &&
2121 name[1] == ':' && name[2] == '\0') {
2122 *cp = '/';
2123 continue;
2124 }
2125 #endif /* !defined unix */
2126 if (!itsdir(name)) {
2127 /*
2128 ** It doesn't seem to exist, so we try to create it.
2129 ** Double check the return. Someone may be one
2130 ** step ahead of us.
2131 */
2132 if (mkdir(name, 0755) != 0) {
2133 int save_error = errno;
2134 if (errno == EEXIST && !itsdir(name)) {
2135 const char *e = strerror(save_error);
2136
2137 (void) fprintf(stderr,
2138 _("%s: Can't create directory %s: %s\n"),
2139 progname, name, e);
2140 ifree(name);
2141 return -1;
2142 }
2143 }
2144 }
2145 *cp = '/';
2146 }
2147 ifree(name);
2148 return 0;
2149 }
2150
2151 static long
2152 eitol(i)
2153 const int i;
2154 {
2155 long l;
2156
2157 l = i;
2158 if ((i < 0 && l >= 0) || (i == 0 && l != 0) || (i > 0 && l <= 0)) {
2159 (void) fprintf(stderr,
2160 _("%s: %d did not sign extend correctly\n"),
2161 progname, i);
2162 (void) exit(EXIT_FAILURE);
2163 }
2164 return l;
2165 }
2166
2167 /*
2168 ** UNIX was a registered trademark of UNIX System Laboratories in 1993.
2169 */
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