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[dragonfly.git] / usr.sbin / zic / zic.c
blobeb1c51e978479725e56cedcdb0833d0d2a1aa49e
1 /*
2 ** This file is in the public domain, so clarified as of
3 ** 2006-07-17 by Arthur David Olson.
4 **
5 ** @(#)zic.c 8.17
6 ** $FreeBSD: src/usr.sbin/zic/zic.c,v 1.11 1999/08/28 01:21:20 peter Exp $
7 ** $DragonFly: src/usr.sbin/zic/zic.c,v 1.7 2008/10/19 20:15:58 swildner Exp $
8 */
9
10 #include <err.h>
11 #include <locale.h>
12 #include <sys/stat.h> /* for umask manifest constants */
13 #include <sys/types.h>
14 #include <unistd.h>
15 #include "private.h"
16 #include "tzfile.h"
17
18 #define ZIC_VERSION '2'
19
20 typedef int_fast64_t zic_t;
21
22 #ifndef ZIC_MAX_ABBR_LEN_WO_WARN
23 #define ZIC_MAX_ABBR_LEN_WO_WARN 6
24 #endif /* !defined ZIC_MAX_ABBR_LEN_WO_WARN */
25
26 #define MKDIR_UMASK (S_IRUSR|S_IWUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH)
27
28 /*
29 ** On some ancient hosts, predicates like `isspace(C)' are defined
30 ** only if isascii(C) || C == EOF. Modern hosts obey the C Standard,
31 ** which says they are defined only if C == ((unsigned char) C) || C == EOF.
32 ** Neither the C Standard nor Posix require that `isascii' exist.
33 ** For portability, we check both ancient and modern requirements.
34 ** If isascii is not defined, the isascii check succeeds trivially.
35 */
36 #include "ctype.h"
37 #ifndef isascii
38 #define isascii(x) 1
39 #endif
40
41 #define OFFSET_STRLEN_MAXIMUM (7 + INT_STRLEN_MAXIMUM(long))
42 #define RULE_STRLEN_MAXIMUM 8 /* "Mdd.dd.d" */
43
44 #define end(cp) (strchr((cp), '\0'))
45
46 struct rule {
47 const char * r_filename;
48 int r_linenum;
49 const char * r_name;
50
51 int r_loyear; /* for example, 1986 */
52 int r_hiyear; /* for example, 1986 */
53 const char * r_yrtype;
54 int r_lowasnum;
55 int r_hiwasnum;
56
57 int r_month; /* 0..11 */
58
59 int r_dycode; /* see below */
60 int r_dayofmonth;
61 int r_wday;
62
63 long r_tod; /* time from midnight */
64 int r_todisstd; /* above is standard time if TRUE */
65 /* or wall clock time if FALSE */
66 int r_todisgmt; /* above is GMT if TRUE */
67 /* or local time if FALSE */
68 long r_stdoff; /* offset from standard time */
69 const char * r_abbrvar; /* variable part of abbreviation */
70
71 int r_todo; /* a rule to do (used in outzone) */
72 zic_t r_temp; /* used in outzone */
73 };
74
75 /*
76 ** r_dycode r_dayofmonth r_wday
77 */
78
79 #define DC_DOM 0 /* 1..31 */ /* unused */
80 #define DC_DOWGEQ 1 /* 1..31 */ /* 0..6 (Sun..Sat) */
81 #define DC_DOWLEQ 2 /* 1..31 */ /* 0..6 (Sun..Sat) */
82
83 struct zone {
84 const char * z_filename;
85 int z_linenum;
86
87 const char * z_name;
88 long z_gmtoff;
89 const char * z_rule;
90 const char * z_format;
91
92 long z_stdoff;
93
94 struct rule * z_rules;
95 int z_nrules;
96
97 struct rule z_untilrule;
98 zic_t z_untiltime;
99 };
100
101 static void addtt(zic_t starttime, int type);
102 static int addtype(long gmtoff, const char *abbr, int isdst,
103 int ttisstd, int ttisgmt);
104 static void leapadd(zic_t t, int positive, int rolling, int count);
105 static void adjleap(void);
106 static void associate(void);
107 static int ciequal(const char *ap, const char *bp);
108 static void convert(long val, char *buf);
109 static void convert64(zic_t val, char *buf);
110 static void dolink(const char *fromfield, const char *tofield);
111 static void doabbr(char *abbr, const char *format,
112 const char *letters, int isdst, int doquotes);
113 static void eat(const char *name, int num);
114 static void eats(const char *name, int num,
115 const char *rname, int rnum);
116 static long eitol(int i);
117 static void error(const char *message);
118 static char ** getfields(char *buf);
119 static long gethms(const char *string, const char *errstrng,
120 int signable);
121 static void infile(const char *filename);
122 static void inleap(char **fields, int nfields);
123 static void inlink(char **fields, int nfields);
124 static void inrule(char **fields, int nfields);
125 static int inzcont(char **fields, int nfields);
126 static int inzone(char **fields, int nfields);
127 static int inzsub(char **fields, int nfields, int iscont);
128 static int is32(zic_t x);
129 static int itsabbr(const char *abbr, const char *word);
130 static int itsdir(const char *name);
131 static int lowerit(int c);
132 static char * memcheck(char *tocheck);
133 static int mkdirs(char *filename);
134 static void newabbr(const char *abbr);
135 static long oadd(long t1, long t2);
136 static void outzone(const struct zone *zp, int ntzones);
137 static void puttzcode(long code, FILE *fp);
138 static void puttzcode64(zic_t code, FILE *fp);
139 static int rcomp(const void *leftp, const void *rightp);
140 static zic_t rpytime(const struct rule *rp, int wantedy);
141 static void rulesub(struct rule *rp,
142 const char *loyearp, const char *hiyearp,
143 const char *typep, const char *monthp,
144 const char *dayp, const char *timep);
145 static int stringoffset(char *result, long offset);
146 static int stringrule(char *result, const struct rule *rp,
147 long dstoff, long gmtoff);
148 static void stringzone(char *result,
149 const struct zone *zp, int ntzones);
150 static void setboundaries(void);
151 static void setgroup(gid_t *flag, const char *name);
152 static void setuser(uid_t *flag, const char *name);
153 static zic_t tadd(const zic_t t1, const long t2);
154 static void usage(void);
155 static void writezone(const char *name, const char *string);
156 static int yearistype(int year, const char *type);
157
158 static int charcnt;
159 static int errors;
160 static const char * filename;
161 static int leapcnt;
162 static int leapseen;
163 static int leapminyear;
164 static int leapmaxyear;
165 static int linenum;
166 static int max_abbrvar_len;
167 static int max_format_len;
168 static zic_t max_time;
169 static int max_year;
170 static zic_t min_time;
171 static int min_year;
172 static int noise;
173 static const char * rfilename;
174 static int rlinenum;
175 static int timecnt;
176 static int typecnt;
177
178 /*
179 ** Line codes.
180 */
181
182 #define LC_RULE 0
183 #define LC_ZONE 1
184 #define LC_LINK 2
185 #define LC_LEAP 3
186
187 /*
188 ** Which fields are which on a Zone line.
189 */
190
191 #define ZF_NAME 1
192 #define ZF_GMTOFF 2
193 #define ZF_RULE 3
194 #define ZF_FORMAT 4
195 #define ZF_TILYEAR 5
196 #define ZF_TILMONTH 6
197 #define ZF_TILDAY 7
198 #define ZF_TILTIME 8
199 #define ZONE_MINFIELDS 5
200 #define ZONE_MAXFIELDS 9
201
202 /*
203 ** Which fields are which on a Zone continuation line.
204 */
205
206 #define ZFC_GMTOFF 0
207 #define ZFC_RULE 1
208 #define ZFC_FORMAT 2
209 #define ZFC_TILYEAR 3
210 #define ZFC_TILMONTH 4
211 #define ZFC_TILDAY 5
212 #define ZFC_TILTIME 6
213 #define ZONEC_MINFIELDS 3
214 #define ZONEC_MAXFIELDS 7
215
216 /*
217 ** Which files are which on a Rule line.
218 */
219
220 #define RF_NAME 1
221 #define RF_LOYEAR 2
222 #define RF_HIYEAR 3
223 #define RF_COMMAND 4
224 #define RF_MONTH 5
225 #define RF_DAY 6
226 #define RF_TOD 7
227 #define RF_STDOFF 8
228 #define RF_ABBRVAR 9
229 #define RULE_FIELDS 10
230
231 /*
232 ** Which fields are which on a Link line.
233 */
234
235 #define LF_FROM 1
236 #define LF_TO 2
237 #define LINK_FIELDS 3
238
239 /*
240 ** Which fields are which on a Leap line.
241 */
242
243 #define LP_YEAR 1
244 #define LP_MONTH 2
245 #define LP_DAY 3
246 #define LP_TIME 4
247 #define LP_CORR 5
248 #define LP_ROLL 6
249 #define LEAP_FIELDS 7
250
251 /*
252 ** Year synonyms.
253 */
254
255 #define YR_MINIMUM 0
256 #define YR_MAXIMUM 1
257 #define YR_ONLY 2
258
259 static struct rule * rules;
260 static int nrules; /* number of rules */
261
262 static struct zone * zones;
263 static int nzones; /* number of zones */
264
265 struct link {
266 const char * l_filename;
267 int l_linenum;
268 const char * l_from;
269 const char * l_to;
270 };
271
272 static struct link * links;
273 static int nlinks;
274
275 struct lookup {
276 const char * l_word;
277 const int l_value;
278 };
279
280 static struct lookup const *byword(const char *string,
281 const struct lookup *lp);
282
283 static struct lookup const line_codes[] = {
284 { "Rule", LC_RULE },
285 { "Zone", LC_ZONE },
286 { "Link", LC_LINK },
287 { "Leap", LC_LEAP },
288 { NULL, 0}
289 };
290
291 static struct lookup const mon_names[] = {
292 { "January", TM_JANUARY },
293 { "February", TM_FEBRUARY },
294 { "March", TM_MARCH },
295 { "April", TM_APRIL },
296 { "May", TM_MAY },
297 { "June", TM_JUNE },
298 { "July", TM_JULY },
299 { "August", TM_AUGUST },
300 { "September", TM_SEPTEMBER },
301 { "October", TM_OCTOBER },
302 { "November", TM_NOVEMBER },
303 { "December", TM_DECEMBER },
304 { NULL, 0 }
305 };
306
307 static struct lookup const wday_names[] = {
308 { "Sunday", TM_SUNDAY },
309 { "Monday", TM_MONDAY },
310 { "Tuesday", TM_TUESDAY },
311 { "Wednesday", TM_WEDNESDAY },
312 { "Thursday", TM_THURSDAY },
313 { "Friday", TM_FRIDAY },
314 { "Saturday", TM_SATURDAY },
315 { NULL, 0 }
316 };
317
318 static struct lookup const lasts[] = {
319 { "last-Sunday", TM_SUNDAY },
320 { "last-Monday", TM_MONDAY },
321 { "last-Tuesday", TM_TUESDAY },
322 { "last-Wednesday", TM_WEDNESDAY },
323 { "last-Thursday", TM_THURSDAY },
324 { "last-Friday", TM_FRIDAY },
325 { "last-Saturday", TM_SATURDAY },
326 { NULL, 0 }
327 };
328
329 static struct lookup const begin_years[] = {
330 { "minimum", YR_MINIMUM },
331 { "maximum", YR_MAXIMUM },
332 { NULL, 0 }
333 };
334
335 static struct lookup const end_years[] = {
336 { "minimum", YR_MINIMUM },
337 { "maximum", YR_MAXIMUM },
338 { "only", YR_ONLY },
339 { NULL, 0 }
340 };
341
342 static struct lookup const leap_types[] = {
343 { "Rolling", TRUE },
344 { "Stationary", FALSE },
345 { NULL, 0 }
346 };
347
348 static const int len_months[2][MONSPERYEAR] = {
349 { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 },
350 { 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }
351 };
352
353 static const int len_years[2] = {
354 DAYSPERNYEAR, DAYSPERLYEAR
355 };
356
357 static struct attype {
358 zic_t at;
359 unsigned char type;
360 } attypes[TZ_MAX_TIMES];
361 static long gmtoffs[TZ_MAX_TYPES];
362 static char isdsts[TZ_MAX_TYPES];
363 static unsigned char abbrinds[TZ_MAX_TYPES];
364 static char ttisstds[TZ_MAX_TYPES];
365 static char ttisgmts[TZ_MAX_TYPES];
366 static char chars[TZ_MAX_CHARS];
367 static zic_t trans[TZ_MAX_LEAPS];
368 static long corr[TZ_MAX_LEAPS];
369 static char roll[TZ_MAX_LEAPS];
370
371 /*
372 ** Memory allocation.
373 */
374
375 static char *
376 memcheck(char * const ptr)
377 {
378 if (ptr == NULL)
379 errx(EXIT_FAILURE, _("memory exhausted"));
380 return ptr;
381 }
382
383 #define emalloc(size) memcheck(imalloc(size))
384 #define erealloc(ptr, size) memcheck(irealloc((ptr), (size)))
385 #define ecpyalloc(ptr) memcheck(icpyalloc(ptr))
386 #define ecatalloc(oldp, newp) memcheck(icatalloc((oldp), (newp)))
387
388 /*
389 ** Error handling.
390 */
391
392 static void
393 eats(const char * const name, const int num,
394 const char * const rname, const int rnum)
395 {
396 filename = name;
397 linenum = num;
398 rfilename = rname;
399 rlinenum = rnum;
400 }
401
402 static void
403 eat(const char * const name, const int num)
404 {
405 eats(name, num, NULL, -1);
406 }
407
408 static void
409 error(const char * const string)
410 {
411 /*
412 ** Match the format of "cc" to allow sh users to
413 ** zic ... 2>&1 | error -t "*" -v
414 ** on BSD systems.
415 */
416 fprintf(stderr, _("\"%s\", line %d: %s"),
417 filename, linenum, string);
418 if (rfilename != NULL)
419 fprintf(stderr, _(" (rule from \"%s\", line %d)"),
420 rfilename, rlinenum);
421 fprintf(stderr, "\n");
422 ++errors;
423 }
424
425 static void
426 warning(const char * const string)
427 {
428 char * cp;
429
430 cp = ecpyalloc(_("warning: "));
431 cp = ecatalloc(cp, string);
432 error(cp);
433 ifree(cp);
434 --errors;
435 }
436
437 static void
438 usage(void)
439 {
440 fprintf(stderr, "%s\n%s\n",
441 _("usage: zic [-v] [-l localtime] [-p posixrules] [-d directory]"),
442 _(" [-L leapseconds] [-y yearistype] [filename ...]"));
443 exit(EXIT_FAILURE);
444 }
445
446 static const char * psxrules;
447 static const char * lcltime;
448 static const char * directory;
449 static const char * leapsec;
450 static const char * yitcommand;
451 static int Dflag;
452 static uid_t uflag = (uid_t)-1;
453 static gid_t gflag = (gid_t)-1;
454 static mode_t mflag = (S_IRUSR | S_IRGRP | S_IROTH
455 | S_IWUSR);
456
457 int
458 main(int argc, char *argv[])
459 {
460 int i;
461 int j;
462 int c;
463
464 #ifdef unix
465 umask(umask(S_IWGRP | S_IWOTH) | (S_IWGRP | S_IWOTH));
466 #endif /* defined unix */
467 while ((c = getopt(argc, argv, "Dd:g:l:m:p:L:u:vsy:")) != -1)
468 switch (c) {
469 default:
470 usage();
471 case 'D':
472 Dflag = 1;
473 break;
474 case 'd':
475 if (directory == NULL)
476 directory = optarg;
477 else
478 errx(EXIT_FAILURE,
479 _("more than one -d option specified"));
480 break;
481 case 'g':
482 setgroup(&gflag, optarg);
483 break;
484 case 'l':
485 if (lcltime == NULL)
486 lcltime = optarg;
487 else
488 errx(EXIT_FAILURE,
489 _("more than one -l option specified"));
490 break;
491 case 'm':
492 {
493 void *set = setmode(optarg);
494 getmode(set, mflag);
495 break;
496 }
497 case 'p':
498 if (psxrules == NULL)
499 psxrules = optarg;
500 else
501 errx(EXIT_FAILURE,
502 _("more than one -p option specified"));
503 break;
504 case 'u':
505 setuser(&uflag, optarg);
506 break;
507 case 'y':
508 if (yitcommand == NULL)
509 yitcommand = optarg;
510 else
511 errx(EXIT_FAILURE,
512 _("more than one -y option specified"));
513 break;
514 case 'L':
515 if (leapsec == NULL)
516 leapsec = optarg;
517 else
518 errx(EXIT_FAILURE,
519 _("more than one -L option specified"));
520 break;
521 case 'v':
522 noise = TRUE;
523 break;
524 case 's':
525 warnx(_("-s ignored\n"));
526 break;
527 }
528 if (optind == argc - 1 && strcmp(argv[optind], "=") == 0)
529 usage(); /* usage message by request */
530 if (directory == NULL)
531 directory = TZDIR;
532 if (yitcommand == NULL)
533 yitcommand = "yearistype";
534
535 setboundaries();
536
537 if (optind < argc && leapsec != NULL) {
538 infile(leapsec);
539 adjleap();
540 }
541
542 for (i = optind; i < argc; ++i)
543 infile(argv[i]);
544 if (errors)
545 exit(EXIT_FAILURE);
546 associate();
547 for (i = 0; i < nzones; i = j) {
548 /*
549 ** Find the next non-continuation zone entry.
550 */
551 for (j = i + 1; j < nzones && zones[j].z_name == NULL; ++j)
552 continue;
553 outzone(&zones[i], j - i);
554 }
555 /*
556 ** Make links.
557 */
558 for (i = 0; i < nlinks; ++i) {
559 eat(links[i].l_filename, links[i].l_linenum);
560 dolink(links[i].l_from, links[i].l_to);
561 if (noise)
562 for (j = 0; j < nlinks; ++j)
563 if (strcmp(links[i].l_to,
564 links[j].l_from) == 0)
565 warning(_("link to link"));
566 }
567 if (lcltime != NULL) {
568 eat("command line", 1);
569 dolink(lcltime, TZDEFAULT);
570 }
571 if (psxrules != NULL) {
572 eat("command line", 1);
573 dolink(psxrules, TZDEFRULES);
574 }
575 return (errors == 0) ? EXIT_SUCCESS : EXIT_FAILURE;
576 }
577
578 static void
579 dolink(const char * const fromfield, const char * const tofield)
580 {
581 char *fromname;
582 char *toname;
583
584 if (fromfield[0] == '/')
585 fromname = ecpyalloc(fromfield);
586 else {
587 fromname = ecpyalloc(directory);
588 fromname = ecatalloc(fromname, "/");
589 fromname = ecatalloc(fromname, fromfield);
590 }
591 if (tofield[0] == '/')
592 toname = ecpyalloc(tofield);
593 else {
594 toname = ecpyalloc(directory);
595 toname = ecatalloc(toname, "/");
596 toname = ecatalloc(toname, tofield);
597 }
598 /*
599 ** We get to be careful here since
600 ** there's a fair chance of root running us.
601 */
602 if (!itsdir(toname))
603 remove(toname);
604 if (link(fromname, toname) != 0) {
605 int result;
606
607 if (mkdirs(toname) != 0)
608 exit(EXIT_FAILURE);
609
610 result = link(fromname, toname);
611 #if HAVE_SYMLINK
612 if (result != 0 &&
613 access(fromname, F_OK) == 0 &&
614 !itsdir(fromname)) {
615 const char *s = tofield;
616 char * symlinkcontents = NULL;
617
618 while ((s = strchr(s+1, '/')) != NULL)
619 symlinkcontents =
620 ecatalloc(symlinkcontents,
621 "../");
622 symlinkcontents =
623 ecatalloc(symlinkcontents,
624 fromname);
625 result = symlink(symlinkcontents,
626 toname);
627 if (result == 0)
628 warning(_("hard link failed, symbolic link used"));
629 ifree(symlinkcontents);
630 }
631 #endif /* HAVE_SYMLINK */
632 if (result != 0) {
633 err(EXIT_FAILURE, _("can't link from %s to %s"),
634 fromname, toname);
635 }
636 }
637 ifree(fromname);
638 ifree(toname);
639 }
640
641 #define TIME_T_BITS_IN_FILE 64
642
643 static void
644 setboundaries(void)
645 {
646 int i;
647
648 min_time = -1;
649 for (i = 0; i < TIME_T_BITS_IN_FILE - 1; ++i)
650 min_time *= 2;
651 max_time = -(min_time + 1);
652 }
653
654 static int
655 itsdir(const char * const name)
656 {
657 char * myname;
658 int accres;
659
660 myname = ecpyalloc(name);
661 myname = ecatalloc(myname, "/.");
662 accres = access(myname, F_OK);
663 ifree(myname);
664 return accres == 0;
665 }
666
667 /*
668 ** Associate sets of rules with zones.
669 */
670
671 /*
672 ** Sort by rule name.
673 */
674
675 static int
676 rcomp(const void *cp1, const void *cp2)
677 {
678 return strcmp(((const struct rule *) cp1)->r_name,
679 ((const struct rule *) cp2)->r_name);
680 }
681
682 static void
683 associate(void)
684 {
685 struct zone *zp;
686 struct rule *rp;
687 int base, out;
688 int i, j;
689
690 if (nrules != 0) {
691 qsort((void *) rules, (size_t) nrules,
692 (size_t) sizeof *rules, rcomp);
693 for (i = 0; i < nrules - 1; ++i) {
694 if (strcmp(rules[i].r_name,
695 rules[i + 1].r_name) != 0)
696 continue;
697 if (strcmp(rules[i].r_filename,
698 rules[i + 1].r_filename) == 0)
699 continue;
700 eat(rules[i].r_filename, rules[i].r_linenum);
701 warning(_("same rule name in multiple files"));
702 eat(rules[i + 1].r_filename, rules[i + 1].r_linenum);
703 warning(_("same rule name in multiple files"));
704 for (j = i + 2; j < nrules; ++j) {
705 if (strcmp(rules[i].r_name,
706 rules[j].r_name) != 0)
707 break;
708 if (strcmp(rules[i].r_filename,
709 rules[j].r_filename) == 0)
710 continue;
711 if (strcmp(rules[i + 1].r_filename,
712 rules[j].r_filename) == 0)
713 continue;
714 break;
715 }
716 i = j - 1;
717 }
718 }
719 for (i = 0; i < nzones; ++i) {
720 zp = &zones[i];
721 zp->z_rules = NULL;
722 zp->z_nrules = 0;
723 }
724 for (base = 0; base < nrules; base = out) {
725 rp = &rules[base];
726 for (out = base + 1; out < nrules; ++out)
727 if (strcmp(rp->r_name, rules[out].r_name) != 0)
728 break;
729 for (i = 0; i < nzones; ++i) {
730 zp = &zones[i];
731 if (strcmp(zp->z_rule, rp->r_name) != 0)
732 continue;
733 zp->z_rules = rp;
734 zp->z_nrules = out - base;
735 }
736 }
737 for (i = 0; i < nzones; ++i) {
738 zp = &zones[i];
739 if (zp->z_nrules == 0) {
740 /*
741 ** Maybe we have a local standard time offset.
742 */
743 eat(zp->z_filename, zp->z_linenum);
744 zp->z_stdoff = gethms(zp->z_rule, _("unruly zone"),
745 TRUE);
746 /*
747 ** Note, though, that if there's no rule,
748 ** a '%s' in the format is a bad thing.
749 */
750 if (strchr(zp->z_format, '%') != 0)
751 error(_("%s in ruleless zone"));
752 }
753 }
754 if (errors)
755 exit(EXIT_FAILURE);
756 }
757
758 static void
759 infile(const char *name)
760 {
761 FILE *fp;
762 char **fields;
763 char *cp;
764 const struct lookup *lp;
765 int nfields;
766 int wantcont;
767 int num;
768 char buf[BUFSIZ];
769
770 if (strcmp(name, "-") == 0) {
771 name = _("standard input");
772 fp = stdin;
773 } else if ((fp = fopen(name, "r")) == NULL)
774 err(EXIT_FAILURE, _("can't open %s"), name);
775 wantcont = FALSE;
776 for (num = 1; ; ++num) {
777 eat(name, num);
778 if (fgets(buf, (int) sizeof buf, fp) != buf)
779 break;
780 cp = strchr(buf, '\n');
781 if (cp == NULL) {
782 error(_("line too long"));
783 exit(EXIT_FAILURE);
784 }
785 *cp = '\0';
786 fields = getfields(buf);
787 nfields = 0;
788 while (fields[nfields] != NULL) {
789 static char nada;
790
791 if (strcmp(fields[nfields], "-") == 0)
792 fields[nfields] = &nada;
793 ++nfields;
794 }
795 if (nfields == 0) {
796 /* nothing to do */
797 } else if (wantcont) {
798 wantcont = inzcont(fields, nfields);
799 } else {
800 lp = byword(fields[0], line_codes);
801 if (lp == NULL)
802 error(_("input line of unknown type"));
803 else switch ((int) (lp->l_value)) {
804 case LC_RULE:
805 inrule(fields, nfields);
806 wantcont = FALSE;
807 break;
808 case LC_ZONE:
809 wantcont = inzone(fields, nfields);
810 break;
811 case LC_LINK:
812 inlink(fields, nfields);
813 wantcont = FALSE;
814 break;
815 case LC_LEAP:
816 if (name != leapsec)
817 warnx(
818 _("leap line in non leap seconds file %s"), name);
819 else inleap(fields, nfields);
820 wantcont = FALSE;
821 break;
822 default: /* "cannot happen" */
823 errx(EXIT_FAILURE,
824 _("panic: invalid l_value %d"), lp->l_value);
825 }
826 }
827 ifree((char *) fields);
828 }
829 if (ferror(fp))
830 errx(EXIT_FAILURE, _("error reading %s"), filename);
831 if (fp != stdin && fclose(fp))
832 err(EXIT_FAILURE, _("error closing %s"), filename);
833 if (wantcont)
834 error(_("expected continuation line not found"));
835 }
836
837 /*
838 ** Convert a string of one of the forms
839 ** h -h hh:mm -hh:mm hh:mm:ss -hh:mm:ss
840 ** into a number of seconds.
841 ** A null string maps to zero.
842 ** Call error with errstring and return zero on errors.
843 */
844
845 static long
846 gethms(const char *string, const char * const errstring, const int signable)
847 {
848 long hh;
849 int mm, ss, sign;
850
851 if (string == NULL || *string == '\0')
852 return 0;
853 if (!signable)
854 sign = 1;
855 else if (*string == '-') {
856 sign = -1;
857 ++string;
858 } else sign = 1;
859 if (sscanf(string, scheck(string, "%ld"), &hh) == 1)
860 mm = ss = 0;
861 else if (sscanf(string, scheck(string, "%ld:%d"), &hh, &mm) == 2)
862 ss = 0;
863 else if (sscanf(string, scheck(string, "%ld:%d:%d"),
864 &hh, &mm, &ss) != 3) {
865 error(errstring);
866 return 0;
867 }
868 if (hh < 0 ||
869 mm < 0 || mm >= MINSPERHOUR ||
870 ss < 0 || ss > SECSPERMIN) {
871 error(errstring);
872 return 0;
873 }
874 if (LONG_MAX / SECSPERHOUR < hh) {
875 error(_("time overflow"));
876 return 0;
877 }
878 if (noise && hh == HOURSPERDAY && mm == 0 && ss == 0)
879 warning(_("24:00 not handled by pre-1998 versions of zic"));
880 if (noise && (hh > HOURSPERDAY ||
881 (hh == HOURSPERDAY && (mm != 0 || ss != 0))))
882 warning(_("values over 24 hours not handled by pre-2007 versions of zic"));
883 return oadd(eitol(sign) * hh * eitol(SECSPERHOUR),
884 eitol(sign) * (eitol(mm) * eitol(SECSPERMIN) + eitol(ss)));
885 }
886
887 static void
888 inrule(char ** const fields, const int nfields)
889 {
890 static struct rule r;
891
892 if (nfields != RULE_FIELDS) {
893 error(_("wrong number of fields on Rule line"));
894 return;
895 }
896 if (*fields[RF_NAME] == '\0') {
897 error(_("nameless rule"));
898 return;
899 }
900 r.r_filename = filename;
901 r.r_linenum = linenum;
902 r.r_stdoff = gethms(fields[RF_STDOFF], _("invalid saved time"), TRUE);
903 rulesub(&r, fields[RF_LOYEAR], fields[RF_HIYEAR], fields[RF_COMMAND],
904 fields[RF_MONTH], fields[RF_DAY], fields[RF_TOD]);
905 r.r_name = ecpyalloc(fields[RF_NAME]);
906 r.r_abbrvar = ecpyalloc(fields[RF_ABBRVAR]);
907 if (max_abbrvar_len < strlen(r.r_abbrvar))
908 max_abbrvar_len = strlen(r.r_abbrvar);
909 rules = (struct rule *) (void *) erealloc((char *) rules,
910 (int) ((nrules + 1) * sizeof *rules));
911 rules[nrules++] = r;
912 }
913
914 static int
915 inzone(char ** const fields, const int nfields)
916 {
917 int i;
918 static char *buf;
919
920 if (nfields < ZONE_MINFIELDS || nfields > ZONE_MAXFIELDS) {
921 error(_("wrong number of fields on Zone line"));
922 return FALSE;
923 }
924 if (strcmp(fields[ZF_NAME], TZDEFAULT) == 0 && lcltime != NULL) {
925 buf = erealloc(buf, (int) (132 + strlen(TZDEFAULT)));
926 sprintf(buf,
927 _("\"Zone %s\" line and -l option are mutually exclusive"),
928 TZDEFAULT);
929 error(buf);
930 return FALSE;
931 }
932 if (strcmp(fields[ZF_NAME], TZDEFRULES) == 0 && psxrules != NULL) {
933 buf = erealloc(buf, (int) (132 + strlen(TZDEFRULES)));
934 sprintf(buf,
935 _("\"Zone %s\" line and -p option are mutually exclusive"),
936 TZDEFRULES);
937 error(buf);
938 return FALSE;
939 }
940 for (i = 0; i < nzones; ++i)
941 if (zones[i].z_name != NULL &&
942 strcmp(zones[i].z_name, fields[ZF_NAME]) == 0) {
943 buf = erealloc(buf, (int) (132 +
944 strlen(fields[ZF_NAME]) +
945 strlen(zones[i].z_filename)));
946 sprintf(buf,
947 _("duplicate zone name %s (file \"%s\", line %d)"),
948 fields[ZF_NAME],
949 zones[i].z_filename,
950 zones[i].z_linenum);
951 error(buf);
952 return FALSE;
953 }
954 return inzsub(fields, nfields, FALSE);
955 }
956
957 static int
958 inzcont(char ** const fields, const int nfields)
959 {
960 if (nfields < ZONEC_MINFIELDS || nfields > ZONEC_MAXFIELDS) {
961 error(_("wrong number of fields on Zone continuation line"));
962 return FALSE;
963 }
964 return inzsub(fields, nfields, TRUE);
965 }
966
967 static int
968 inzsub(char ** const fields, const int nfields, const int iscont)
969 {
970 char *cp;
971 static struct zone z;
972 int i_gmtoff, i_rule, i_format;
973 int i_untilyear, i_untilmonth;
974 int i_untilday, i_untiltime;
975 int hasuntil;
976
977 if (iscont) {
978 i_gmtoff = ZFC_GMTOFF;
979 i_rule = ZFC_RULE;
980 i_format = ZFC_FORMAT;
981 i_untilyear = ZFC_TILYEAR;
982 i_untilmonth = ZFC_TILMONTH;
983 i_untilday = ZFC_TILDAY;
984 i_untiltime = ZFC_TILTIME;
985 z.z_name = NULL;
986 } else {
987 i_gmtoff = ZF_GMTOFF;
988 i_rule = ZF_RULE;
989 i_format = ZF_FORMAT;
990 i_untilyear = ZF_TILYEAR;
991 i_untilmonth = ZF_TILMONTH;
992 i_untilday = ZF_TILDAY;
993 i_untiltime = ZF_TILTIME;
994 z.z_name = ecpyalloc(fields[ZF_NAME]);
995 }
996 z.z_filename = filename;
997 z.z_linenum = linenum;
998 z.z_gmtoff = gethms(fields[i_gmtoff], _("invalid UTC offset"), TRUE);
999 if ((cp = strchr(fields[i_format], '%')) != 0) {
1000 if (*++cp != 's' || strchr(cp, '%') != 0) {
1001 error(_("invalid abbreviation format"));
1002 return FALSE;
1003 }
1004 }
1005 z.z_rule = ecpyalloc(fields[i_rule]);
1006 z.z_format = ecpyalloc(fields[i_format]);
1007 if (max_format_len < strlen(z.z_format))
1008 max_format_len = strlen(z.z_format);
1009 hasuntil = nfields > i_untilyear;
1010 if (hasuntil) {
1011 z.z_untilrule.r_filename = filename;
1012 z.z_untilrule.r_linenum = linenum;
1013 rulesub(&z.z_untilrule,
1014 fields[i_untilyear],
1015 "only",
1016 "",
1017 (nfields > i_untilmonth) ?
1018 fields[i_untilmonth] : "Jan",
1019 (nfields > i_untilday) ? fields[i_untilday] : "1",
1020 (nfields > i_untiltime) ? fields[i_untiltime] : "0");
1021 z.z_untiltime = rpytime(&z.z_untilrule,
1022 z.z_untilrule.r_loyear);
1023 if (iscont && nzones > 0 &&
1024 z.z_untiltime > min_time &&
1025 z.z_untiltime < max_time &&
1026 zones[nzones - 1].z_untiltime > min_time &&
1027 zones[nzones - 1].z_untiltime < max_time &&
1028 zones[nzones - 1].z_untiltime >= z.z_untiltime) {
1029 error(_(
1030 "Zone continuation line end time is not after end time of previous line"
1031 ));
1032 return FALSE;
1033 }
1034 }
1035 zones = (struct zone *) (void *) erealloc((char *) zones,
1036 (int) ((nzones + 1) * sizeof *zones));
1037 zones[nzones++] = z;
1038 /*
1039 ** If there was an UNTIL field on this line,
1040 ** there's more information about the zone on the next line.
1041 */
1042 return hasuntil;
1043 }
1044
1045 static void
1046 inleap(char ** const fields, const int nfields)
1047 {
1048 const char *cp;
1049 const struct lookup *lp;
1050 int i, j;
1051 int year, month, day;
1052 long dayoff, tod;
1053 zic_t t;
1054
1055 if (nfields != LEAP_FIELDS) {
1056 error(_("wrong number of fields on Leap line"));
1057 return;
1058 }
1059 dayoff = 0;
1060 cp = fields[LP_YEAR];
1061 if (sscanf(cp, scheck(cp, "%d"), &year) != 1) {
1062 /*
1063 ** Leapin' Lizards!
1064 */
1065 error(_("invalid leaping year"));
1066 return;
1067 }
1068 if (!leapseen || leapmaxyear < year)
1069 leapmaxyear = year;
1070 if (!leapseen || leapminyear > year)
1071 leapminyear = year;
1072 leapseen = TRUE;
1073 j = EPOCH_YEAR;
1074 while (j != year) {
1075 if (year > j) {
1076 i = len_years[isleap(j)];
1077 ++j;
1078 } else {
1079 --j;
1080 i = -len_years[isleap(j)];
1081 }
1082 dayoff = oadd(dayoff, eitol(i));
1083 }
1084 if ((lp = byword(fields[LP_MONTH], mon_names)) == NULL) {
1085 error(_("invalid month name"));
1086 return;
1087 }
1088 month = lp->l_value;
1089 j = TM_JANUARY;
1090 while (j != month) {
1091 i = len_months[isleap(year)][j];
1092 dayoff = oadd(dayoff, eitol(i));
1093 ++j;
1094 }
1095 cp = fields[LP_DAY];
1096 if (sscanf(cp, scheck(cp, "%d"), &day) != 1 ||
1097 day <= 0 || day > len_months[isleap(year)][month]) {
1098 error(_("invalid day of month"));
1099 return;
1100 }
1101 dayoff = oadd(dayoff, eitol(day - 1));
1102 if (dayoff < 0 && !TYPE_SIGNED(zic_t)) {
1103 error(_("time before zero"));
1104 return;
1105 }
1106 if (dayoff < min_time / SECSPERDAY) {
1107 error(_("time too small"));
1108 return;
1109 }
1110 if (dayoff > max_time / SECSPERDAY) {
1111 error(_("time too large"));
1112 return;
1113 }
1114 t = (zic_t) dayoff * SECSPERDAY;
1115 tod = gethms(fields[LP_TIME], _("invalid time of day"), FALSE);
1116 cp = fields[LP_CORR];
1117 {
1118 int positive;
1119 int count;
1120
1121 if (strcmp(cp, "") == 0) { /* infile() turns "-" into "" */
1122 positive = FALSE;
1123 count = 1;
1124 } else if (strcmp(cp, "--") == 0) {
1125 positive = FALSE;
1126 count = 2;
1127 } else if (strcmp(cp, "+") == 0) {
1128 positive = TRUE;
1129 count = 1;
1130 } else if (strcmp(cp, "++") == 0) {
1131 positive = TRUE;
1132 count = 2;
1133 } else {
1134 error(_("illegal CORRECTION field on Leap line"));
1135 return;
1136 }
1137 if ((lp = byword(fields[LP_ROLL], leap_types)) == NULL) {
1138 error(_(
1139 "illegal Rolling/Stationary field on Leap line"
1140 ));
1141 return;
1142 }
1143 leapadd(tadd(t, tod), positive, lp->l_value, count);
1144 }
1145 }
1146
1147 static void
1148 inlink(char ** const fields, const int nfields)
1149 {
1150 struct link l;
1151
1152 if (nfields != LINK_FIELDS) {
1153 error(_("wrong number of fields on Link line"));
1154 return;
1155 }
1156 if (*fields[LF_FROM] == '\0') {
1157 error(_("blank FROM field on Link line"));
1158 return;
1159 }
1160 if (*fields[LF_TO] == '\0') {
1161 error(_("blank TO field on Link line"));
1162 return;
1163 }
1164 l.l_filename = filename;
1165 l.l_linenum = linenum;
1166 l.l_from = ecpyalloc(fields[LF_FROM]);
1167 l.l_to = ecpyalloc(fields[LF_TO]);
1168 links = (struct link *) (void *) erealloc((char *) links,
1169 (int) ((nlinks + 1) * sizeof *links));
1170 links[nlinks++] = l;
1171 }
1172
1173 static void
1174 rulesub(struct rule * const rp,
1175 const char * const loyearp,
1176 const char * const hiyearp,
1177 const char * const typep,
1178 const char * const monthp,
1179 const char * const dayp,
1180 const char * const timep)
1181 {
1182 const struct lookup *lp;
1183 const char *cp;
1184 char *dp;
1185 char *ep;
1186
1187 if ((lp = byword(monthp, mon_names)) == NULL) {
1188 error(_("invalid month name"));
1189 return;
1190 }
1191 rp->r_month = lp->l_value;
1192 rp->r_todisstd = FALSE;
1193 rp->r_todisgmt = FALSE;
1194 dp = ecpyalloc(timep);
1195 if (*dp != '\0') {
1196 ep = dp + strlen(dp) - 1;
1197 switch (lowerit(*ep)) {
1198 case 's': /* Standard */
1199 rp->r_todisstd = TRUE;
1200 rp->r_todisgmt = FALSE;
1201 *ep = '\0';
1202 break;
1203 case 'w': /* Wall */
1204 rp->r_todisstd = FALSE;
1205 rp->r_todisgmt = FALSE;
1206 *ep = '\0';
1207 break;
1208 case 'g': /* Greenwich */
1209 case 'u': /* Universal */
1210 case 'z': /* Zulu */
1211 rp->r_todisstd = TRUE;
1212 rp->r_todisgmt = TRUE;
1213 *ep = '\0';
1214 break;
1215 }
1216 }
1217 rp->r_tod = gethms(dp, _("invalid time of day"), FALSE);
1218 ifree(dp);
1219 /*
1220 ** Year work.
1221 */
1222 cp = loyearp;
1223 lp = byword(cp, begin_years);
1224 rp->r_lowasnum = lp == NULL;
1225 if (!rp->r_lowasnum) switch ((int) lp->l_value) {
1226 case YR_MINIMUM:
1227 rp->r_loyear = INT_MIN;
1228 break;
1229 case YR_MAXIMUM:
1230 rp->r_loyear = INT_MAX;
1231 break;
1232 default: /* "cannot happen" */
1233 errx(EXIT_FAILURE,
1234 _("panic: invalid l_value %d"), lp->l_value);
1235 } else if (sscanf(cp, scheck(cp, "%d"), &rp->r_loyear) != 1) {
1236 error(_("invalid starting year"));
1237 return;
1238 }
1239 cp = hiyearp;
1240 lp = byword(cp, end_years);
1241 rp->r_hiwasnum = lp == NULL;
1242 if (!rp->r_hiwasnum) switch ((int) lp->l_value) {
1243 case YR_MINIMUM:
1244 rp->r_hiyear = INT_MIN;
1245 break;
1246 case YR_MAXIMUM:
1247 rp->r_hiyear = INT_MAX;
1248 break;
1249 case YR_ONLY:
1250 rp->r_hiyear = rp->r_loyear;
1251 break;
1252 default: /* "cannot happen" */
1253 errx(EXIT_FAILURE,
1254 _("panic: invalid l_value %d"), lp->l_value);
1255 } else if (sscanf(cp, scheck(cp, "%d"), &rp->r_hiyear) != 1) {
1256 error(_("invalid ending year"));
1257 return;
1258 }
1259 if (rp->r_loyear > rp->r_hiyear) {
1260 error(_("starting year greater than ending year"));
1261 return;
1262 }
1263 if (*typep == '\0')
1264 rp->r_yrtype = NULL;
1265 else {
1266 if (rp->r_loyear == rp->r_hiyear) {
1267 error(_("typed single year"));
1268 return;
1269 }
1270 rp->r_yrtype = ecpyalloc(typep);
1271 }
1272 /*
1273 ** Day work.
1274 ** Accept things such as:
1275 ** 1
1276 ** last-Sunday
1277 ** Sun<=20
1278 ** Sun>=7
1279 */
1280 dp = ecpyalloc(dayp);
1281 if ((lp = byword(dp, lasts)) != NULL) {
1282 rp->r_dycode = DC_DOWLEQ;
1283 rp->r_wday = lp->l_value;
1284 rp->r_dayofmonth = len_months[1][rp->r_month];
1285 } else {
1286 if ((ep = strchr(dp, '<')) != 0)
1287 rp->r_dycode = DC_DOWLEQ;
1288 else if ((ep = strchr(dp, '>')) != 0)
1289 rp->r_dycode = DC_DOWGEQ;
1290 else {
1291 ep = dp;
1292 rp->r_dycode = DC_DOM;
1293 }
1294 if (rp->r_dycode != DC_DOM) {
1295 *ep++ = 0;
1296 if (*ep++ != '=') {
1297 error(_("invalid day of month"));
1298 ifree(dp);
1299 return;
1300 }
1301 if ((lp = byword(dp, wday_names)) == NULL) {
1302 error(_("invalid weekday name"));
1303 ifree(dp);
1304 return;
1305 }
1306 rp->r_wday = lp->l_value;
1307 }
1308 if (sscanf(ep, scheck(ep, "%d"), &rp->r_dayofmonth) != 1 ||
1309 rp->r_dayofmonth <= 0 ||
1310 (rp->r_dayofmonth > len_months[1][rp->r_month])) {
1311 error(_("invalid day of month"));
1312 ifree(dp);
1313 return;
1314 }
1315 }
1316 ifree(dp);
1317 }
1318
1319 static void
1320 convert(const long val, char * const buf)
1321 {
1322 int i;
1323 int shift;
1324
1325 for (i = 0, shift = 24; i < 4; ++i, shift -= 8)
1326 buf[i] = val >> shift;
1327 }
1328
1329 static void
1330 convert64(const zic_t val, char * const buf)
1331 {
1332 int i;
1333 int shift;
1334
1335 for (i = 0, shift = 56; i < 8; ++i, shift -= 8)
1336 buf[i] = val >> shift;
1337 }
1338
1339 static void
1340 puttzcode(const long val, FILE * const fp)
1341 {
1342 char buf[4];
1343
1344 convert(val, buf);
1345 fwrite((void *) buf, (size_t) sizeof buf, (size_t) 1, fp);
1346 }
1347
1348 static void
1349 puttzcode64(const zic_t val, FILE * const fp)
1350 {
1351 char buf[8];
1352
1353 convert64(val, buf);
1354 fwrite((void *) buf, (size_t) sizeof buf, (size_t) 1, fp);
1355 }
1356
1357 static int
1358 atcomp(const void * avp, const void * bvp)
1359 {
1360 const zic_t a = ((const struct attype *) avp)->at;
1361 const zic_t b = ((const struct attype *) bvp)->at;
1362
1363 return (a < b) ? -1 : (a > b);
1364 }
1365
1366 static int
1367 is32(const zic_t x)
1368 {
1369 return INT32_MIN <= x && x <= INT32_MAX;
1370 }
1371
1372 static void
1373 writezone(const char * const name, const char * const string)
1374 {
1375 FILE * fp;
1376 int i, j;
1377 int leapcnt32, leapi32;
1378 int timecnt32, timei32;
1379 int pass;
1380 static char * fullname;
1381 static const struct tzhead tzh0;
1382 static struct tzhead tzh;
1383 zic_t ats[TZ_MAX_TIMES];
1384 unsigned char types[TZ_MAX_TIMES];
1385
1386 /*
1387 ** Sort.
1388 */
1389 if (timecnt > 1)
1390 qsort((void *) attypes, (size_t) timecnt,
1391 (size_t) sizeof *attypes, atcomp);
1392 /*
1393 ** Optimize.
1394 */
1395 {
1396 int fromi;
1397 int toi;
1398
1399 toi = 0;
1400 fromi = 0;
1401 while (fromi < timecnt && attypes[fromi].at < min_time)
1402 ++fromi;
1403 if (isdsts[0] == 0)
1404 while (fromi < timecnt && attypes[fromi].type == 0)
1405 ++fromi; /* handled by default rule */
1406 for ( ; fromi < timecnt; ++fromi) {
1407 if (toi != 0 && ((attypes[fromi].at +
1408 gmtoffs[attypes[toi - 1].type]) <=
1409 (attypes[toi - 1].at + gmtoffs[toi == 1 ? 0
1410 : attypes[toi - 2].type]))) {
1411 attypes[toi - 1].type =
1412 attypes[fromi].type;
1413 continue;
1414 }
1415 if (toi == 0 ||
1416 attypes[toi - 1].type != attypes[fromi].type)
1417 attypes[toi++] = attypes[fromi];
1418 }
1419 timecnt = toi;
1420 }
1421 /*
1422 ** Transfer.
1423 */
1424 for (i = 0; i < timecnt; ++i) {
1425 ats[i] = attypes[i].at;
1426 types[i] = attypes[i].type;
1427 }
1428 /*
1429 ** Correct for leap seconds.
1430 */
1431 for (i = 0; i < timecnt; ++i) {
1432 j = leapcnt;
1433 while (--j >= 0)
1434 if (ats[i] > trans[j] - corr[j]) {
1435 ats[i] = tadd(ats[i], corr[j]);
1436 break;
1437 }
1438 }
1439 /*
1440 ** Figure out 32-bit-limited starts and counts.
1441 */
1442 timecnt32 = timecnt;
1443 timei32 = 0;
1444 leapcnt32 = leapcnt;
1445 leapi32 = 0;
1446 while (timecnt32 > 0 && !is32(ats[timecnt32 - 1]))
1447 --timecnt32;
1448 while (timecnt32 > 0 && !is32(ats[timei32])) {
1449 --timecnt32;
1450 ++timei32;
1451 }
1452 while (leapcnt32 > 0 && !is32(trans[leapcnt32 - 1]))
1453 --leapcnt32;
1454 while (leapcnt32 > 0 && !is32(trans[leapi32])) {
1455 --leapcnt32;
1456 ++leapi32;
1457 }
1458 fullname = erealloc(fullname,
1459 (int) (strlen(directory) + 1 + strlen(name) + 1));
1460 sprintf(fullname, "%s/%s", directory, name);
1461 /*
1462 ** Remove old file, if any, to snap links.
1463 */
1464 if (!itsdir(fullname) && remove(fullname) != 0 && errno != ENOENT)
1465 err(EXIT_FAILURE, _("can't remove %s"), fullname);
1466 if ((fp = fopen(fullname, "wb")) == NULL) {
1467 if (mkdirs(fullname) != 0)
1468 exit(EXIT_FAILURE);
1469 if ((fp = fopen(fullname, "wb")) == NULL)
1470 err(EXIT_FAILURE, _("can't create %s"), fullname);
1471 }
1472 for (pass = 1; pass <= 2; ++pass) {
1473 int thistimei, thistimecnt;
1474 int thisleapi, thisleapcnt;
1475 int thistimelim, thisleaplim;
1476 int writetype[TZ_MAX_TIMES];
1477 int typemap[TZ_MAX_TYPES];
1478 int thistypecnt;
1479 char thischars[TZ_MAX_CHARS];
1480 char thischarcnt;
1481 int indmap[TZ_MAX_CHARS];
1482
1483 if (pass == 1) {
1484 thistimei = timei32;
1485 thistimecnt = timecnt32;
1486 thisleapi = leapi32;
1487 thisleapcnt = leapcnt32;
1488 } else {
1489 thistimei = 0;
1490 thistimecnt = timecnt;
1491 thisleapi = 0;
1492 thisleapcnt = leapcnt;
1493 }
1494 thistimelim = thistimei + thistimecnt;
1495 thisleaplim = thisleapi + thisleapcnt;
1496 for (i = 0; i < typecnt; ++i)
1497 writetype[i] = thistimecnt == timecnt;
1498 if (thistimecnt == 0) {
1499 /*
1500 ** No transition times fall in the current
1501 ** (32- or 64-bit) window.
1502 */
1503 if (typecnt != 0)
1504 writetype[typecnt - 1] = TRUE;
1505 } else {
1506 for (i = thistimei - 1; i < thistimelim; ++i)
1507 if (i >= 0)
1508 writetype[types[i]] = TRUE;
1509 /*
1510 ** For America/Godthab and Antarctica/Palmer
1511 */
1512 if (thistimei == 0)
1513 writetype[0] = TRUE;
1514 }
1515 thistypecnt = 0;
1516 for (i = 0; i < typecnt; ++i)
1517 typemap[i] = writetype[i] ? thistypecnt++ : -1;
1518 for (i = 0; i < sizeof indmap / sizeof indmap[0]; ++i)
1519 indmap[i] = -1;
1520 thischarcnt = 0;
1521 for (i = 0; i < typecnt; ++i) {
1522 char * thisabbr;
1523
1524 if (!writetype[i])
1525 continue;
1526 if (indmap[abbrinds[i]] >= 0)
1527 continue;
1528 thisabbr = &chars[abbrinds[i]];
1529 for (j = 0; j < thischarcnt; ++j)
1530 if (strcmp(&thischars[j], thisabbr) == 0)
1531 break;
1532 if (j == thischarcnt) {
1533 strcpy(&thischars[(int) thischarcnt],
1534 thisabbr);
1535 thischarcnt += strlen(thisabbr) + 1;
1536 }
1537 indmap[abbrinds[i]] = j;
1538 }
1539 #define DO(field) fwrite((void *) tzh.field, \
1540 (size_t) sizeof tzh.field, (size_t) 1, fp)
1541 tzh = tzh0;
1542 strncpy(tzh.tzh_magic, TZ_MAGIC, sizeof tzh.tzh_magic);
1543 tzh.tzh_version[0] = ZIC_VERSION;
1544 convert(eitol(thistypecnt), tzh.tzh_ttisgmtcnt);
1545 convert(eitol(thistypecnt), tzh.tzh_ttisstdcnt);
1546 convert(eitol(thisleapcnt), tzh.tzh_leapcnt);
1547 convert(eitol(thistimecnt), tzh.tzh_timecnt);
1548 convert(eitol(thistypecnt), tzh.tzh_typecnt);
1549 convert(eitol(thischarcnt), tzh.tzh_charcnt);
1550 DO(tzh_magic);
1551 DO(tzh_version);
1552 DO(tzh_reserved);
1553 DO(tzh_ttisgmtcnt);
1554 DO(tzh_ttisstdcnt);
1555 DO(tzh_leapcnt);
1556 DO(tzh_timecnt);
1557 DO(tzh_typecnt);
1558 DO(tzh_charcnt);
1559 #undef DO
1560 for (i = thistimei; i < thistimelim; ++i)
1561 if (pass == 1)
1562 puttzcode((long) ats[i], fp);
1563 else puttzcode64(ats[i], fp);
1564 for (i = thistimei; i < thistimelim; ++i) {
1565 unsigned char uc;
1566
1567 uc = typemap[types[i]];
1568 fwrite((void *) &uc,
1569 (size_t) sizeof uc,
1570 (size_t) 1,
1571 fp);
1572 }
1573 for (i = 0; i < typecnt; ++i)
1574 if (writetype[i]) {
1575 puttzcode(gmtoffs[i], fp);
1576 putc(isdsts[i], fp);
1577 putc((unsigned char) indmap[abbrinds[i]], fp);
1578 }
1579 if (thischarcnt != 0)
1580 fwrite((void *) thischars,
1581 (size_t) sizeof thischars[0],
1582 (size_t) thischarcnt, fp);
1583 for (i = thisleapi; i < thisleaplim; ++i) {
1584 register zic_t todo;
1585
1586 if (roll[i]) {
1587 if (timecnt == 0 || trans[i] < ats[0]) {
1588 j = 0;
1589 while (isdsts[j])
1590 if (++j >= typecnt) {
1591 j = 0;
1592 break;
1593 }
1594 } else {
1595 j = 1;
1596 while (j < timecnt &&
1597 trans[i] >= ats[j])
1598 ++j;
1599 j = types[j - 1];
1600 }
1601 todo = tadd(trans[i], -gmtoffs[j]);
1602 } else todo = trans[i];
1603 if (pass == 1)
1604 puttzcode((long) todo, fp);
1605 else puttzcode64(todo, fp);
1606 puttzcode(corr[i], fp);
1607 }
1608 for (i = 0; i < typecnt; ++i)
1609 if (writetype[i])
1610 putc(ttisstds[i], fp);
1611 for (i = 0; i < typecnt; ++i)
1612 if (writetype[i])
1613 putc(ttisgmts[i], fp);
1614 }
1615 fprintf(fp, "\n%s\n", string);
1616 if (ferror(fp) || fclose(fp))
1617 errx(EXIT_FAILURE, _("error writing %s"), fullname);
1618 if (chmod(fullname, mflag) < 0)
1619 err(EXIT_FAILURE, _("cannot change mode of %s to %03o"),
1620 fullname, (unsigned)mflag);
1621 if ((uflag != (uid_t)-1 || gflag != (gid_t)-1)
1622 && chown(fullname, uflag, gflag) < 0)
1623 err(EXIT_FAILURE, _("cannot change ownership of %s"),
1624 fullname);
1625 }
1626
1627 static void
1628 doabbr(char * const abbr, const char * const format,
1629 const char * const letters, const int isdst, const int doquotes)
1630 {
1631 char * cp;
1632 char * slashp;
1633 int len;
1634
1635 slashp = strchr(format, '/');
1636 if (slashp == NULL) {
1637 if (letters == NULL)
1638 strcpy(abbr, format);
1639 else sprintf(abbr, format, letters);
1640 } else if (isdst) {
1641 strcpy(abbr, slashp + 1);
1642 } else {
1643 if (slashp > format)
1644 strncpy(abbr, format,
1645 (unsigned) (slashp - format));
1646 abbr[slashp - format] = '\0';
1647 }
1648 if (!doquotes)
1649 return;
1650 for (cp = abbr; *cp != '\0'; ++cp)
1651 if (strchr("ABCDEFGHIJKLMNOPQRSTUVWXYZ", *cp) == NULL &&
1652 strchr("abcdefghijklmnopqrstuvwxyz", *cp) == NULL)
1653 break;
1654 len = strlen(abbr);
1655 if (len > 0 && *cp == '\0')
1656 return;
1657 abbr[len + 2] = '\0';
1658 abbr[len + 1] = '>';
1659 for ( ; len > 0; --len)
1660 abbr[len] = abbr[len - 1];
1661 abbr[0] = '<';
1662 }
1663
1664 static void
1665 updateminmax(const int x)
1666 {
1667 if (min_year > x)
1668 min_year = x;
1669 if (max_year < x)
1670 max_year = x;
1671 }
1672
1673 static int
1674 stringoffset(char *result, long offset)
1675 {
1676 int hours;
1677 int minutes;
1678 int seconds;
1679
1680 result[0] = '\0';
1681 if (offset < 0) {
1682 strcpy(result, "-");
1683 offset = -offset;
1684 }
1685 seconds = offset % SECSPERMIN;
1686 offset /= SECSPERMIN;
1687 minutes = offset % MINSPERHOUR;
1688 offset /= MINSPERHOUR;
1689 hours = offset;
1690 if (hours >= HOURSPERDAY) {
1691 result[0] = '\0';
1692 return -1;
1693 }
1694 sprintf(end(result), "%d", hours);
1695 if (minutes != 0 || seconds != 0) {
1696 sprintf(end(result), ":%02d", minutes);
1697 if (seconds != 0)
1698 sprintf(end(result), ":%02d", seconds);
1699 }
1700 return 0;
1701 }
1702
1703 static int
1704 stringrule(char *result, const struct rule * const rp, const long dstoff,
1705 const long gmtoff)
1706 {
1707 long tod;
1708
1709 result = end(result);
1710 if (rp->r_dycode == DC_DOM) {
1711 int month, total;
1712
1713 if (rp->r_dayofmonth == 29 && rp->r_month == TM_FEBRUARY)
1714 return -1;
1715 total = 0;
1716 for (month = 0; month < rp->r_month; ++month)
1717 total += len_months[0][month];
1718 sprintf(result, "J%d", total + rp->r_dayofmonth);
1719 } else {
1720 int week;
1721
1722 if (rp->r_dycode == DC_DOWGEQ) {
1723 week = 1 + rp->r_dayofmonth / DAYSPERWEEK;
1724 if ((week - 1) * DAYSPERWEEK + 1 != rp->r_dayofmonth)
1725 return -1;
1726 } else if (rp->r_dycode == DC_DOWLEQ) {
1727 if (rp->r_dayofmonth == len_months[1][rp->r_month])
1728 week = 5;
1729 else {
1730 week = 1 + rp->r_dayofmonth / DAYSPERWEEK;
1731 if (week * DAYSPERWEEK - 1 != rp->r_dayofmonth)
1732 return -1;
1733 }
1734 } else return -1; /* "cannot happen" */
1735 sprintf(result, "M%d.%d.%d",
1736 rp->r_month + 1, week, rp->r_wday);
1737 }
1738 tod = rp->r_tod;
1739 if (rp->r_todisgmt)
1740 tod += gmtoff;
1741 if (rp->r_todisstd && rp->r_stdoff == 0)
1742 tod += dstoff;
1743 if (tod < 0) {
1744 result[0] = '\0';
1745 return -1;
1746 }
1747 if (tod != 2 * SECSPERMIN * MINSPERHOUR) {
1748 strcat(result, "/");
1749 if (stringoffset(end(result), tod) != 0)
1750 return -1;
1751 }
1752 return 0;
1753 }
1754
1755 static void
1756 stringzone(char *result, const struct zone * const zpfirst,
1757 const int zonecount)
1758 {
1759 const struct zone * zp;
1760 struct rule * rp;
1761 struct rule * stdrp;
1762 struct rule * dstrp;
1763 int i;
1764 const char * abbrvar;
1765
1766 result[0] = '\0';
1767 zp = zpfirst + zonecount - 1;
1768 stdrp = dstrp = NULL;
1769 for (i = 0; i < zp->z_nrules; ++i) {
1770 rp = &zp->z_rules[i];
1771 if (rp->r_hiwasnum || rp->r_hiyear != INT_MAX)
1772 continue;
1773 if (rp->r_yrtype != NULL)
1774 continue;
1775 if (rp->r_stdoff == 0) {
1776 if (stdrp == NULL)
1777 stdrp = rp;
1778 else return;
1779 } else {
1780 if (dstrp == NULL)
1781 dstrp = rp;
1782 else return;
1783 }
1784 }
1785 if (stdrp == NULL && dstrp == NULL) {
1786 /*
1787 ** There are no rules running through "max".
1788 ** Let's find the latest rule.
1789 */
1790 for (i = 0; i < zp->z_nrules; ++i) {
1791 rp = &zp->z_rules[i];
1792 if (stdrp == NULL || rp->r_hiyear > stdrp->r_hiyear ||
1793 (rp->r_hiyear == stdrp->r_hiyear &&
1794 rp->r_month > stdrp->r_month))
1795 stdrp = rp;
1796 }
1797 if (stdrp != NULL && stdrp->r_stdoff != 0)
1798 return; /* We end up in DST (a POSIX no-no). */
1799 /*
1800 ** Horrid special case: if year is 2037,
1801 ** presume this is a zone handled on a year-by-year basis;
1802 ** do not try to apply a rule to the zone.
1803 */
1804 if (stdrp != NULL && stdrp->r_hiyear == 2037)
1805 return;
1806 }
1807 if (stdrp == NULL && zp->z_nrules != 0)
1808 return;
1809 abbrvar = (stdrp == NULL) ? "" : stdrp->r_abbrvar;
1810 doabbr(result, zp->z_format, abbrvar, FALSE, TRUE);
1811 if (stringoffset(end(result), -zp->z_gmtoff) != 0) {
1812 result[0] = '\0';
1813 return;
1814 }
1815 if (dstrp == NULL)
1816 return;
1817 doabbr(end(result), zp->z_format, dstrp->r_abbrvar, TRUE, TRUE);
1818 if (dstrp->r_stdoff != SECSPERMIN * MINSPERHOUR)
1819 if (stringoffset(end(result),
1820 -(zp->z_gmtoff + dstrp->r_stdoff)) != 0) {
1821 result[0] = '\0';
1822 return;
1823 }
1824 strcat(result, ",");
1825 if (stringrule(result, dstrp, dstrp->r_stdoff, zp->z_gmtoff) != 0) {
1826 result[0] = '\0';
1827 return;
1828 }
1829 strcat(result, ",");
1830 if (stringrule(result, stdrp, dstrp->r_stdoff, zp->z_gmtoff) != 0) {
1831 result[0] = '\0';
1832 return;
1833 }
1834 }
1835
1836 static void
1837 outzone(const struct zone * const zpfirst, const int zonecount)
1838 {
1839 const struct zone *zp;
1840 struct rule *rp;
1841 int i, j;
1842 int usestart, useuntil;
1843 zic_t starttime, untiltime;
1844 long gmtoff;
1845 long stdoff;
1846 int year;
1847 long startoff;
1848 int startttisstd;
1849 int startttisgmt;
1850 int type;
1851 char *startbuf;
1852 char *ab;
1853 char *envvar;
1854 int max_abbr_len;
1855 int max_envvar_len;
1856
1857 max_abbr_len = 2 + max_format_len + max_abbrvar_len;
1858 max_envvar_len = 2 * max_abbr_len + 5 * 9;
1859 startbuf = emalloc(max_abbr_len + 1);
1860 ab = emalloc(max_abbr_len + 1);
1861 envvar = emalloc(max_envvar_len + 1);
1862 INITIALIZE(untiltime);
1863 INITIALIZE(starttime);
1864 /*
1865 ** Now. . .finally. . .generate some useful data!
1866 */
1867 timecnt = 0;
1868 typecnt = 0;
1869 charcnt = 0;
1870 /*
1871 ** Thanks to Earl Chew
1872 ** for noting the need to unconditionally initialize startttisstd.
1873 */
1874 startttisstd = FALSE;
1875 startttisgmt = FALSE;
1876 min_year = max_year = EPOCH_YEAR;
1877 if (leapseen) {
1878 updateminmax(leapminyear);
1879 updateminmax(leapmaxyear);
1880 }
1881 for (i = 0; i < zonecount; ++i) {
1882 zp = &zpfirst[i];
1883 if (i < zonecount - 1)
1884 updateminmax(zp->z_untilrule.r_loyear);
1885 for (j = 0; j < zp->z_nrules; ++j) {
1886 rp = &zp->z_rules[j];
1887 if (rp->r_lowasnum)
1888 updateminmax(rp->r_loyear);
1889 if (rp->r_hiwasnum)
1890 updateminmax(rp->r_hiyear);
1891 }
1892 }
1893 /*
1894 ** Generate lots of data if a rule can't cover all future times.
1895 */
1896 stringzone(envvar, zpfirst, zonecount);
1897 if (noise && envvar[0] == '\0') {
1898 char * wp;
1899
1900 wp = ecpyalloc(_("no POSIX environment variable for zone"));
1901 wp = ecatalloc(wp, " ");
1902 wp = ecatalloc(wp, zpfirst->z_name);
1903 warning(wp);
1904 ifree(wp);
1905 }
1906 if (envvar[0] == '\0') {
1907 if (min_year >= INT_MIN + YEARSPERREPEAT)
1908 min_year -= YEARSPERREPEAT;
1909 else min_year = INT_MIN;
1910 if (max_year <= INT_MAX - YEARSPERREPEAT)
1911 max_year += YEARSPERREPEAT;
1912 else max_year = INT_MAX;
1913 }
1914 /*
1915 ** For the benefit of older systems,
1916 ** generate data from 1900 through 2037.
1917 */
1918 if (min_year > 1900)
1919 min_year = 1900;
1920 if (max_year < 2037)
1921 max_year = 2037;
1922 for (i = 0; i < zonecount; ++i) {
1923 /*
1924 ** A guess that may well be corrected later.
1925 */
1926 stdoff = 0;
1927 zp = &zpfirst[i];
1928 usestart = i > 0 && (zp - 1)->z_untiltime > min_time;
1929 useuntil = i < (zonecount - 1);
1930 if (useuntil && zp->z_untiltime <= min_time)
1931 continue;
1932 gmtoff = zp->z_gmtoff;
1933 eat(zp->z_filename, zp->z_linenum);
1934 *startbuf = '\0';
1935 startoff = zp->z_gmtoff;
1936 if (zp->z_nrules == 0) {
1937 stdoff = zp->z_stdoff;
1938 doabbr(startbuf, zp->z_format,
1939 NULL, stdoff != 0, FALSE);
1940 type = addtype(oadd(zp->z_gmtoff, stdoff),
1941 startbuf, stdoff != 0, startttisstd,
1942 startttisgmt);
1943 if (usestart) {
1944 addtt(starttime, type);
1945 usestart = FALSE;
1946 } else if (stdoff != 0)
1947 addtt(min_time, type);
1948 } else for (year = min_year; year <= max_year; ++year) {
1949 if (useuntil && year > zp->z_untilrule.r_hiyear)
1950 break;
1951 /*
1952 ** Mark which rules to do in the current year.
1953 ** For those to do, calculate rpytime(rp, year);
1954 */
1955 for (j = 0; j < zp->z_nrules; ++j) {
1956 rp = &zp->z_rules[j];
1957 eats(zp->z_filename, zp->z_linenum,
1958 rp->r_filename, rp->r_linenum);
1959 rp->r_todo = year >= rp->r_loyear &&
1960 year <= rp->r_hiyear &&
1961 yearistype(year, rp->r_yrtype);
1962 if (rp->r_todo)
1963 rp->r_temp = rpytime(rp, year);
1964 }
1965 for ( ; ; ) {
1966 int k;
1967 zic_t jtime, ktime;
1968 long offset;
1969
1970 INITIALIZE(ktime);
1971 if (useuntil) {
1972 /*
1973 ** Turn untiltime into UTC
1974 ** assuming the current gmtoff and
1975 ** stdoff values.
1976 */
1977 untiltime = zp->z_untiltime;
1978 if (!zp->z_untilrule.r_todisgmt)
1979 untiltime = tadd(untiltime,
1980 -gmtoff);
1981 if (!zp->z_untilrule.r_todisstd)
1982 untiltime = tadd(untiltime,
1983 -stdoff);
1984 }
1985 /*
1986 ** Find the rule (of those to do, if any)
1987 ** that takes effect earliest in the year.
1988 */
1989 k = -1;
1990 for (j = 0; j < zp->z_nrules; ++j) {
1991 rp = &zp->z_rules[j];
1992 if (!rp->r_todo)
1993 continue;
1994 eats(zp->z_filename, zp->z_linenum,
1995 rp->r_filename, rp->r_linenum);
1996 offset = rp->r_todisgmt ? 0 : gmtoff;
1997 if (!rp->r_todisstd)
1998 offset = oadd(offset, stdoff);
1999 jtime = rp->r_temp;
2000 if (jtime == min_time ||
2001 jtime == max_time)
2002 continue;
2003 jtime = tadd(jtime, -offset);
2004 if (k < 0 || jtime < ktime) {
2005 k = j;
2006 ktime = jtime;
2007 }
2008 }
2009 if (k < 0)
2010 break; /* go on to next year */
2011 rp = &zp->z_rules[k];
2012 rp->r_todo = FALSE;
2013 if (useuntil && ktime >= untiltime)
2014 break;
2015 stdoff = rp->r_stdoff;
2016 if (usestart && ktime == starttime)
2017 usestart = FALSE;
2018 if (usestart) {
2019 if (ktime < starttime) {
2020 startoff = oadd(zp->z_gmtoff,
2021 stdoff);
2022 doabbr(startbuf, zp->z_format,
2023 rp->r_abbrvar,
2024 rp->r_stdoff != 0,
2025 FALSE);
2026 continue;
2027 }
2028 if (*startbuf == '\0' &&
2029 startoff == oadd(zp->z_gmtoff,
2030 stdoff)) {
2031 doabbr(startbuf,
2032 zp->z_format,
2033 rp->r_abbrvar,
2034 rp->r_stdoff !=
2035 0,
2036 FALSE);
2037 }
2038 }
2039 eats(zp->z_filename, zp->z_linenum,
2040 rp->r_filename, rp->r_linenum);
2041 doabbr(ab, zp->z_format, rp->r_abbrvar,
2042 rp->r_stdoff != 0, FALSE);
2043 offset = oadd(zp->z_gmtoff, rp->r_stdoff);
2044 type = addtype(offset, ab, rp->r_stdoff != 0,
2045 rp->r_todisstd, rp->r_todisgmt);
2046 addtt(ktime, type);
2047 }
2048 }
2049 if (usestart) {
2050 if (*startbuf == '\0' &&
2051 zp->z_format != NULL &&
2052 strchr(zp->z_format, '%') == NULL &&
2053 strchr(zp->z_format, '/') == NULL)
2054 strcpy(startbuf, zp->z_format);
2055 eat(zp->z_filename, zp->z_linenum);
2056 if (*startbuf == '\0')
2057 error(_("can't determine time zone abbreviation to use just after until time"));
2058 else addtt(starttime,
2059 addtype(startoff, startbuf,
2060 startoff != zp->z_gmtoff,
2061 startttisstd,
2062 startttisgmt));
2063 }
2064 /*
2065 ** Now we may get to set starttime for the next zone line.
2066 */
2067 if (useuntil) {
2068 startttisstd = zp->z_untilrule.r_todisstd;
2069 startttisgmt = zp->z_untilrule.r_todisgmt;
2070 starttime = zp->z_untiltime;
2071 if (!startttisstd)
2072 starttime = tadd(starttime, -stdoff);
2073 if (!startttisgmt)
2074 starttime = tadd(starttime, -gmtoff);
2075 }
2076 }
2077 writezone(zpfirst->z_name, envvar);
2078 ifree(startbuf);
2079 ifree(ab);
2080 ifree(envvar);
2081 }
2082
2083 static void
2084 addtt(const zic_t starttime, int type)
2085 {
2086 if (starttime <= min_time ||
2087 (timecnt == 1 && attypes[0].at < min_time)) {
2088 gmtoffs[0] = gmtoffs[type];
2089 isdsts[0] = isdsts[type];
2090 ttisstds[0] = ttisstds[type];
2091 ttisgmts[0] = ttisgmts[type];
2092 if (abbrinds[type] != 0)
2093 strcpy(chars, &chars[abbrinds[type]]);
2094 abbrinds[0] = 0;
2095 charcnt = strlen(chars) + 1;
2096 typecnt = 1;
2097 timecnt = 0;
2098 type = 0;
2099 }
2100 if (timecnt >= TZ_MAX_TIMES) {
2101 error(_("too many transitions?!"));
2102 exit(EXIT_FAILURE);
2103 }
2104 attypes[timecnt].at = starttime;
2105 attypes[timecnt].type = type;
2106 ++timecnt;
2107 }
2108
2109 static int
2110 addtype(const long gmtoff, const char * const abbr, const int isdst,
2111 const int ttisstd, const int ttisgmt)
2112 {
2113 int i, j;
2114
2115 if (isdst != TRUE && isdst != FALSE) {
2116 error(_("internal error - addtype called with bad isdst"));
2117 exit(EXIT_FAILURE);
2118 }
2119 if (ttisstd != TRUE && ttisstd != FALSE) {
2120 error(_("internal error - addtype called with bad ttisstd"));
2121 exit(EXIT_FAILURE);
2122 }
2123 if (ttisgmt != TRUE && ttisgmt != FALSE) {
2124 error(_("internal error - addtype called with bad ttisgmt"));
2125 exit(EXIT_FAILURE);
2126 }
2127 /*
2128 ** See if there's already an entry for this zone type.
2129 ** If so, just return its index.
2130 */
2131 for (i = 0; i < typecnt; ++i) {
2132 if (gmtoff == gmtoffs[i] && isdst == isdsts[i] &&
2133 strcmp(abbr, &chars[abbrinds[i]]) == 0 &&
2134 ttisstd == ttisstds[i] &&
2135 ttisgmt == ttisgmts[i])
2136 return i;
2137 }
2138 /*
2139 ** There isn't one; add a new one, unless there are already too
2140 ** many.
2141 */
2142 if (typecnt >= TZ_MAX_TYPES) {
2143 error(_("too many local time types"));
2144 exit(EXIT_FAILURE);
2145 }
2146 if (! (-1L - 2147483647L <= gmtoff && gmtoff <= 2147483647L)) {
2147 error(_("UTC offset out of range"));
2148 exit(EXIT_FAILURE);
2149 }
2150 gmtoffs[i] = gmtoff;
2151 isdsts[i] = isdst;
2152 ttisstds[i] = ttisstd;
2153 ttisgmts[i] = ttisgmt;
2154
2155 for (j = 0; j < charcnt; ++j)
2156 if (strcmp(&chars[j], abbr) == 0)
2157 break;
2158 if (j == charcnt)
2159 newabbr(abbr);
2160 abbrinds[i] = j;
2161 ++typecnt;
2162 return i;
2163 }
2164
2165 static void
2166 leapadd(const zic_t t, const int positive, const int rolling, int count)
2167 {
2168 int i, j;
2169
2170 if (leapcnt + (positive ? count : 1) > TZ_MAX_LEAPS) {
2171 error(_("too many leap seconds"));
2172 exit(EXIT_FAILURE);
2173 }
2174 for (i = 0; i < leapcnt; ++i)
2175 if (t <= trans[i]) {
2176 if (t == trans[i]) {
2177 error(_("repeated leap second moment"));
2178 exit(EXIT_FAILURE);
2179 }
2180 break;
2181 }
2182 do {
2183 for (j = leapcnt; j > i; --j) {
2184 trans[j] = trans[j - 1];
2185 corr[j] = corr[j - 1];
2186 roll[j] = roll[j - 1];
2187 }
2188 trans[i] = t;
2189 corr[i] = positive ? 1L : eitol(-count);
2190 roll[i] = rolling;
2191 ++leapcnt;
2192 } while (positive && --count != 0);
2193 }
2194
2195 static void
2196 adjleap(void)
2197 {
2198 int i;
2199 long last = 0;
2200
2201 /*
2202 ** propagate leap seconds forward
2203 */
2204 for (i = 0; i < leapcnt; ++i) {
2205 trans[i] = tadd(trans[i], last);
2206 last = corr[i] += last;
2207 }
2208 }
2209
2210 static int
2211 yearistype(const int year, const char * const type)
2212 {
2213 static char * buf;
2214 int result;
2215
2216 if (type == NULL || *type == '\0')
2217 return TRUE;
2218 buf = erealloc(buf, (int) (132 + strlen(yitcommand) + strlen(type)));
2219 sprintf(buf, "%s %d %s", yitcommand, year, type);
2220 result = system(buf);
2221 if (WIFEXITED(result)) switch (WEXITSTATUS(result)) {
2222 case 0:
2223 return TRUE;
2224 case 1:
2225 return FALSE;
2226 }
2227 error(_("Wild result from command execution"));
2228 warnx(_("command was '%s', result was %d"), buf, result);
2229 for ( ; ; )
2230 exit(EXIT_FAILURE);
2231 }
2232
2233 static int
2234 lowerit(int a)
2235 {
2236 a = (unsigned char) a;
2237 return (isascii(a) && isupper(a)) ? tolower(a) : a;
2238 }
2239
2240 static int
2241 ciequal(const char *ap, const char *bp) /* case-insensitive equality */
2242 {
2243 while (lowerit(*ap) == lowerit(*bp++))
2244 if (*ap++ == '\0')
2245 return TRUE;
2246 return FALSE;
2247 }
2248
2249 static int
2250 itsabbr(const char *abbr, const char *word)
2251 {
2252 if (lowerit(*abbr) != lowerit(*word))
2253 return FALSE;
2254 ++word;
2255 while (*++abbr != '\0')
2256 do {
2257 if (*word == '\0')
2258 return FALSE;
2259 } while (lowerit(*word++) != lowerit(*abbr));
2260 return TRUE;
2261 }
2262
2263 static const struct lookup *
2264 byword(const char * const word, const struct lookup * const table)
2265 {
2266 const struct lookup *foundlp;
2267 const struct lookup *lp;
2268
2269 if (word == NULL || table == NULL)
2270 return NULL;
2271 /*
2272 ** Look for exact match.
2273 */
2274 for (lp = table; lp->l_word != NULL; ++lp)
2275 if (ciequal(word, lp->l_word))
2276 return lp;
2277 /*
2278 ** Look for inexact match.
2279 */
2280 foundlp = NULL;
2281 for (lp = table; lp->l_word != NULL; ++lp)
2282 if (itsabbr(word, lp->l_word)) {
2283 if (foundlp == NULL)
2284 foundlp = lp;
2285 else return NULL; /* multiple inexact matches */
2286 }
2287 return foundlp;
2288 }
2289
2290 static char **
2291 getfields(char *cp)
2292 {
2293 char *dp;
2294 char **array;
2295 int nsubs;
2296
2297 if (cp == NULL)
2298 return NULL;
2299 array = (char **) (void *)
2300 emalloc((int) ((strlen(cp) + 1) * sizeof *array));
2301 nsubs = 0;
2302 for ( ; ; ) {
2303 while (isascii((unsigned char) *cp) &&
2304 isspace((unsigned char) *cp))
2305 ++cp;
2306 if (*cp == '\0' || *cp == '#')
2307 break;
2308 array[nsubs++] = dp = cp;
2309 do {
2310 if ((*dp = *cp++) != '"')
2311 ++dp;
2312 else while ((*dp = *cp++) != '"')
2313 if (*dp != '\0')
2314 ++dp;
2315 else {
2316 error(_(
2317 "Odd number of quotation marks"
2318 ));
2319 exit(1);
2320 }
2321 } while (*cp != '\0' && *cp != '#' &&
2322 (!isascii(*cp) || !isspace((unsigned char) *cp)));
2323 if (isascii(*cp) && isspace((unsigned char) *cp))
2324 ++cp;
2325 *dp = '\0';
2326 }
2327 array[nsubs] = NULL;
2328 return array;
2329 }
2330
2331 static long
2332 oadd(const long t1, const long t2)
2333 {
2334 long t;
2335
2336 t = t1 + t2;
2337 if ((t2 > 0 && t <= t1) || (t2 < 0 && t >= t1)) {
2338 error(_("time overflow"));
2339 exit(EXIT_FAILURE);
2340 }
2341 return t;
2342 }
2343
2344 static zic_t
2345 tadd(const zic_t t1, const long t2)
2346 {
2347 zic_t t;
2348
2349 if (t1 == max_time && t2 > 0)
2350 return max_time;
2351 if (t1 == min_time && t2 < 0)
2352 return min_time;
2353 t = t1 + t2;
2354 if ((t2 > 0 && t <= t1) || (t2 < 0 && t >= t1)) {
2355 error(_("time overflow"));
2356 exit(EXIT_FAILURE);
2357 }
2358 return t;
2359 }
2360
2361 /*
2362 ** Given a rule, and a year, compute the date - in seconds since January 1,
2363 ** 1970, 00:00 LOCAL time - in that year that the rule refers to.
2364 */
2365
2366 static zic_t
2367 rpytime(const struct rule * const rp, const int wantedy)
2368 {
2369 int y, m, i;
2370 long dayoff; /* with a nod to Margaret O. */
2371 zic_t t;
2372
2373 if (wantedy == INT_MIN)
2374 return min_time;
2375 if (wantedy == INT_MAX)
2376 return max_time;
2377 dayoff = 0;
2378 m = TM_JANUARY;
2379 y = EPOCH_YEAR;
2380 while (wantedy != y) {
2381 if (wantedy > y) {
2382 i = len_years[isleap(y)];
2383 ++y;
2384 } else {
2385 --y;
2386 i = -len_years[isleap(y)];
2387 }
2388 dayoff = oadd(dayoff, eitol(i));
2389 }
2390 while (m != rp->r_month) {
2391 i = len_months[isleap(y)][m];
2392 dayoff = oadd(dayoff, eitol(i));
2393 ++m;
2394 }
2395 i = rp->r_dayofmonth;
2396 if (m == TM_FEBRUARY && i == 29 && !isleap(y)) {
2397 if (rp->r_dycode == DC_DOWLEQ)
2398 --i;
2399 else {
2400 error(_("use of 2/29 in non leap-year"));
2401 exit(EXIT_FAILURE);
2402 }
2403 }
2404 --i;
2405 dayoff = oadd(dayoff, eitol(i));
2406 if (rp->r_dycode == DC_DOWGEQ || rp->r_dycode == DC_DOWLEQ) {
2407 long wday;
2408
2409 #define LDAYSPERWEEK ((long) DAYSPERWEEK)
2410 wday = eitol(EPOCH_WDAY);
2411 /*
2412 ** Don't trust mod of negative numbers.
2413 */
2414 if (dayoff >= 0)
2415 wday = (wday + dayoff) % LDAYSPERWEEK;
2416 else {
2417 wday -= ((-dayoff) % LDAYSPERWEEK);
2418 if (wday < 0)
2419 wday += LDAYSPERWEEK;
2420 }
2421 while (wday != eitol(rp->r_wday))
2422 if (rp->r_dycode == DC_DOWGEQ) {
2423 dayoff = oadd(dayoff, (long) 1);
2424 if (++wday >= LDAYSPERWEEK)
2425 wday = 0;
2426 ++i;
2427 } else {
2428 dayoff = oadd(dayoff, (long) -1);
2429 if (--wday < 0)
2430 wday = LDAYSPERWEEK - 1;
2431 --i;
2432 }
2433 if (i < 0 || i >= len_months[isleap(y)][m]) {
2434 if (noise)
2435 warning(_("rule goes past start/end of month--\
2436 will not work with pre-2004 versions of zic"));
2437 }
2438 }
2439 if (dayoff < min_time / SECSPERDAY)
2440 return min_time;
2441 if (dayoff > max_time / SECSPERDAY)
2442 return max_time;
2443 t = (zic_t) dayoff * SECSPERDAY;
2444 return tadd(t, rp->r_tod);
2445 }
2446
2447 static void
2448 newabbr(const char * const string)
2449 {
2450 int i;
2451
2452 if (strcmp(string, GRANDPARENTED) != 0) {
2453 const char * cp;
2454 char * wp;
2455
2456 /*
2457 ** Want one to ZIC_MAX_ABBR_LEN_WO_WARN alphabetics
2458 ** optionally followed by a + or - and a number from 1 to 14.
2459 */
2460 cp = string;
2461 wp = NULL;
2462 while (isascii((unsigned char) *cp) &&
2463 isalpha((unsigned char) *cp))
2464 ++cp;
2465 if (cp - string == 0)
2466 wp = _("time zone abbreviation lacks alphabetic at start");
2467 if (noise && cp - string > 3)
2468 wp = _("time zone abbreviation has more than 3 alphabetics");
2469 if (cp - string > ZIC_MAX_ABBR_LEN_WO_WARN)
2470 wp = _("time zone abbreviation has too many alphabetics");
2471 if (wp == NULL && (*cp == '+' || *cp == '-')) {
2472 ++cp;
2473 if (isascii((unsigned char) *cp) &&
2474 isdigit((unsigned char) *cp))
2475 if (*cp++ == '1' &&
2476 *cp >= '0' && *cp <= '4')
2477 ++cp;
2478 }
2479 if (*cp != '\0')
2480 wp = _("time zone abbreviation differs from POSIX standard");
2481 if (wp != NULL) {
2482 wp = ecpyalloc(wp);
2483 wp = ecatalloc(wp, " (");
2484 wp = ecatalloc(wp, string);
2485 wp = ecatalloc(wp, ")");
2486 warning(wp);
2487 ifree(wp);
2488 }
2489 }
2490 i = strlen(string) + 1;
2491 if (charcnt + i > TZ_MAX_CHARS) {
2492 error(_("too many, or too long, time zone abbreviations"));
2493 exit(EXIT_FAILURE);
2494 }
2495 strcpy(&chars[charcnt], string);
2496 charcnt += eitol(i);
2497 }
2498
2499 static int
2500 mkdirs(char *argname)
2501 {
2502 char *name;
2503 char *cp;
2504
2505 if (argname == NULL || *argname == '\0' || Dflag)
2506 return 0;
2507 cp = name = ecpyalloc(argname);
2508 while ((cp = strchr(cp + 1, '/')) != 0) {
2509 *cp = '\0';
2510 #ifndef unix
2511 /*
2512 ** DOS drive specifier?
2513 */
2514 if (isalpha((unsigned char) name[0]) &&
2515 name[1] == ':' && name[2] == '\0') {
2516 *cp = '/';
2517 continue;
2518 }
2519 #endif /* !defined unix */
2520 if (!itsdir(name)) {
2521 /*
2522 ** It doesn't seem to exist, so we try to create it.
2523 ** Creation may fail because of the directory being
2524 ** created by some other multiprocessor, so we get
2525 ** to do extra checking.
2526 */
2527 if ((mkdir(name, MKDIR_UMASK) != 0) &&
2528 (errno != EEXIST || !itsdir(name))) {
2529 warn(_("can't create directory %s"), name);
2530 ifree(name);
2531 return -1;
2532 }
2533 }
2534 *cp = '/';
2535 }
2536 ifree(name);
2537 return 0;
2538 }
2539
2540 static long
2541 eitol(const int i)
2542 {
2543 long l;
2544
2545 l = i;
2546 if ((i < 0 && l >= 0) || (i == 0 && l != 0) || (i > 0 && l <= 0))
2547 errx(EXIT_FAILURE, _("%d did not sign extend correctly"), i);
2548 return l;
2549 }
2550
2551 #include <grp.h>
2552 #include <pwd.h>
2553
2554 static void
2555 setgroup(gid_t *flag, const char *name)
2556 {
2557 struct group *gr;
2558
2559 if (*flag != (gid_t)-1)
2560 errx(EXIT_FAILURE, _("multiple -g flags specified"));
2561
2562 gr = getgrnam(name);
2563 if (gr == 0) {
2564 char *ep;
2565 unsigned long ul;
2566
2567 ul = strtoul(name, &ep, 10);
2568 if (ul == (unsigned long)(gid_t)ul && *ep == '\0') {
2569 *flag = ul;
2570 return;
2571 }
2572 errx(EXIT_FAILURE, _("group `%s' not found"), name);
2573 }
2574 *flag = gr->gr_gid;
2575 }
2576
2577 static void
2578 setuser(uid_t *flag, const char *name)
2579 {
2580 struct passwd *pw;
2581
2582 if (*flag != (gid_t)-1)
2583 errx(EXIT_FAILURE, _("multiple -u flags specified"));
2584
2585 pw = getpwnam(name);
2586 if (pw == 0) {
2587 char *ep;
2588 unsigned long ul;
2589
2590 ul = strtoul(name, &ep, 10);
2591 if (ul == (unsigned long)(gid_t)ul && *ep == '\0') {
2592 *flag = ul;
2593 return;
2594 }
2595 errx(EXIT_FAILURE, _("user `%s' not found"), name);
2596 }
2597 *flag = pw->pw_uid;
2598 }
2599
2600 /*
2601 ** UNIX was a registered trademark of The Open Group in 2003.
2602 */
DragonFly BSD