1 /*
2 * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
3 * Use is subject to license terms.
4 */
5 #pragma ident "%Z%%M% %I% %E% SMI"
6
7 static char elsieid[] = "@(#)zic.c 7.128.1";
8
9 /*
10 * #define LEAPSECOND_SUPPORT
11 */
12
13 /*
14 * Regardless of the type of time_t, we do our work using this type.
15 */
16
17 typedef int zic_t;
18
19 #include "private.h"
20 #include <tzfile.h> /* this is in system headers at Sun */
21
22 #include <sys/stat.h> /* for umask manifest constants */
23 #include <ctype.h>
24 #include <locale.h>
25 #include <stdlib.h> /* for getopt */
26
27 #ifndef ZIC_MAX_ABBR_LEN_WO_WARN
28 #define ZIC_MAX_ABBR_LEN_WO_WARN 6
29 #endif /* !defined ZIC_MAX_ABBR_LEN_WO_WARN */
30
31 #ifdef S_IRUSR
32 #define MKDIR_UMASK (S_IRUSR|S_IWUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH)
33 #else
34 #define MKDIR_UMASK 0755
35 #endif
36
37 struct rule {
38 const char *r_filename;
39 int r_linenum;
40 const char *r_name;
41
42 int r_loyear; /* for example, 1986 */
43 int r_hiyear; /* for example, 1986 */
44 const char *r_yrtype;
45
46 int r_month; /* 0..11 */
47
48 int r_dycode; /* see below */
49 int r_dayofmonth;
50 int r_wday;
51
52 long r_tod; /* time from midnight */
53 int r_todisstd; /* above is standard time if TRUE */
54 /* or wall clock time if FALSE */
55 int r_todisgmt; /* above is GMT if TRUE */
56 /* or local time if FALSE */
57 long r_stdoff; /* offset from standard time */
58 const char *r_abbrvar; /* variable part of abbreviation */
59
60 int r_todo; /* a rule to do (used in outzone) */
61 zic_t r_temp; /* used in outzone */
62 };
63
64 /*
65 * r_dycode r_dayofmonth r_wday
66 */
67
68 #define DC_DOM 0 /* 1..31 */ /* unused */
69 #define DC_DOWGEQ 1 /* 1..31 */ /* 0..6 (Sun..Sat) */
70 #define DC_DOWLEQ 2 /* 1..31 */ /* 0..6 (Sun..Sat) */
71
72 struct zone {
73 const char *z_filename;
74 int z_linenum;
75
76 const char *z_name;
77 long z_gmtoff;
78 const char *z_rule;
79 const char *z_format;
80
81 long z_stdoff;
82
83 struct rule *z_rules;
84 int z_nrules;
85
86 struct rule z_untilrule;
87 zic_t z_untiltime;
88 };
89
90 static void addtt(zic_t starttime, int type);
91 static int addtype(long gmtoff, const char *abbr, int isdst,
92 int ttisstd, int ttisgmt);
93 #ifdef LEAPSECOND_SUPPORT
94 static void leapadd(zic_t t, int positive, int rolling, int count);
95 static void adjleap(void);
96 #endif
97 static void associate(void);
98 static int ciequal(const char *ap, const char *bp);
99 static void convert(long val, char *buf);
100 static void dolink(const char *fromfield, const char *tofield);
101 static void doabbr(char *abbr, const char *format,
102 const char *letters, int isdst);
103 static void eat(const char *name, int num);
104 static void eats(const char *name, int num,
105 const char *rname, int rnum);
106 static long eitol(int i);
107 static void error(const char *message);
108 static char **getfields(char *buf);
109 static long gethms(const char *string, const char *errstrng, int signable);
110 static void infile(const char *filename);
111 #ifdef LEAPSECOND_SUPPORT
112 static void inleap(char **fields, int nfields);
113 #endif
114 static void inlink(char **fields, int nfields);
115 static void inrule(char **fields, int nfields);
116 static int inzcont(char **fields, int nfields);
117 static int inzone(char **fields, int nfields);
118 static int inzsub(char **fields, int nfields, int iscont);
119 static int itsabbr(const char *abbr, const char *word);
120 static int itsdir(const char *name);
121 static int lowerit(int c);
122 static char *memcheck(char *tocheck);
123 static int mkdirs(char *filename);
124 static void newabbr(const char *abbr);
125 static long oadd(long t1, long t2);
126 static void outzone(const struct zone *zp, int ntzones);
127 static void puttzcode(long code, FILE *fp);
128 static int rcomp(const void *leftp, const void *rightp);
129 static zic_t rpytime(const struct rule *rp, int wantedy);
130 static void rulesub(struct rule *rp,
131 const char *loyearp, const char *hiyearp,
132 const char *typep, const char *monthp,
133 const char *dayp, const char *timep);
134 static void setboundaries(void);
135 static zic_t tadd(zic_t t1, long t2);
136 static void usage(void);
137 static void writezone(const char *name);
138 static int yearistype(int year, const char *type);
139
140 static int charcnt;
141 static int errors;
142 static const char *filename;
143 static int leapcnt;
144 static int linenum;
145 static zic_t max_time;
146 static int max_year;
147 static int max_year_representable;
148 static zic_t min_time;
149 static int min_year;
150 static int min_year_representable;
151 static int noise;
152 static const char *rfilename;
153 static int rlinenum;
154 static const char *progname;
155 static int timecnt;
156 static int typecnt;
157
158 /*
159 * Line codes.
160 */
161
162 #define LC_RULE 0
163 #define LC_ZONE 1
164 #define LC_LINK 2
165 #define LC_LEAP 3
166
167 /*
168 * Which fields are which on a Zone line.
169 */
170
171 #define ZF_NAME 1
172 #define ZF_GMTOFF 2
173 #define ZF_RULE 3
174 #define ZF_FORMAT 4
175 #define ZF_TILYEAR 5
176 #define ZF_TILMONTH 6
177 #define ZF_TILDAY 7
178 #define ZF_TILTIME 8
179 #define ZONE_MINFIELDS 5
180 #define ZONE_MAXFIELDS 9
181
182 /*
183 * Which fields are which on a Zone continuation line.
184 */
185
186 #define ZFC_GMTOFF 0
187 #define ZFC_RULE 1
188 #define ZFC_FORMAT 2
189 #define ZFC_TILYEAR 3
190 #define ZFC_TILMONTH 4
191 #define ZFC_TILDAY 5
192 #define ZFC_TILTIME 6
193 #define ZONEC_MINFIELDS 3
194 #define ZONEC_MAXFIELDS 7
195
196 /*
197 * Which files are which on a Rule line.
198 */
199
200 #define RF_NAME 1
201 #define RF_LOYEAR 2
202 #define RF_HIYEAR 3
203 #define RF_COMMAND 4
204 #define RF_MONTH 5
205 #define RF_DAY 6
206 #define RF_TOD 7
207 #define RF_STDOFF 8
208 #define RF_ABBRVAR 9
209 #define RULE_FIELDS 10
210
211 /*
212 * Which fields are which on a Link line.
213 */
214
215 #define LF_FROM 1
216 #define LF_TO 2
217 #define LINK_FIELDS 3
218
219 /*
220 * Which fields are which on a Leap line.
221 */
222
223 #define LP_YEAR 1
224 #define LP_MONTH 2
225 #define LP_DAY 3
226 #define LP_TIME 4
227 #define LP_CORR 5
228 #define LP_ROLL 6
229 #define LEAP_FIELDS 7
230
231 /*
232 * Year synonyms.
233 */
234
235 #define YR_MINIMUM 0
236 #define YR_MAXIMUM 1
237 #define YR_ONLY 2
238
239 static struct rule *rules;
240 static int nrules; /* number of rules */
241
242 static struct zone *zones;
243 static int nzones; /* number of zones */
244
245 struct link {
246 const char *l_filename;
247 int l_linenum;
248 const char *l_from;
249 const char *l_to;
250 };
251
252 static struct link *links;
253 static int nlinks;
254
255 struct lookup {
256 const char *l_word;
257 const int l_value;
258 };
259
260 static struct lookup const *byword(const char *string,
261 const struct lookup *lp);
262
263 static struct lookup const line_codes[] = {
264 { "Rule", LC_RULE },
265 { "Zone", LC_ZONE },
266 { "Link", LC_LINK },
267 { "Leap", LC_LEAP },
268 { NULL, 0}
269 };
270
271 static struct lookup const mon_names[] = {
272 { "January", TM_JANUARY },
273 { "February", TM_FEBRUARY },
274 { "March", TM_MARCH },
275 { "April", TM_APRIL },
276 { "May", TM_MAY },
277 { "June", TM_JUNE },
278 { "July", TM_JULY },
279 { "August", TM_AUGUST },
280 { "September", TM_SEPTEMBER },
281 { "October", TM_OCTOBER },
282 { "November", TM_NOVEMBER },
283 { "December", TM_DECEMBER },
284 { NULL, 0 }
285 };
286
287 static struct lookup const wday_names[] = {
288 { "Sunday", TM_SUNDAY },
289 { "Monday", TM_MONDAY },
290 { "Tuesday", TM_TUESDAY },
291 { "Wednesday", TM_WEDNESDAY },
292 { "Thursday", TM_THURSDAY },
293 { "Friday", TM_FRIDAY },
294 { "Saturday", TM_SATURDAY },
295 { NULL, 0 }
296 };
297
298 static struct lookup const lasts[] = {
299 { "last-Sunday", TM_SUNDAY },
300 { "last-Monday", TM_MONDAY },
301 { "last-Tuesday", TM_TUESDAY },
302 { "last-Wednesday", TM_WEDNESDAY },
303 { "last-Thursday", TM_THURSDAY },
304 { "last-Friday", TM_FRIDAY },
305 { "last-Saturday", TM_SATURDAY },
306 { NULL, 0 }
307 };
308
309 static struct lookup const begin_years[] = {
310 { "minimum", YR_MINIMUM },
311 { "maximum", YR_MAXIMUM },
312 { NULL, 0 }
313 };
314
315 static struct lookup const end_years[] = {
316 { "minimum", YR_MINIMUM },
317 { "maximum", YR_MAXIMUM },
318 { "only", YR_ONLY },
319 { NULL, 0 }
320 };
321
322 static struct lookup const leap_types[] = {
323 { "Rolling", TRUE },
324 { "Stationary", FALSE },
325 { NULL, 0 }
326 };
327
328 static const int len_months[2][MONSPERYEAR] = {
329 { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 },
330 { 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }
331 };
332
333 static const int len_years[2] = {
334 DAYSPERNYEAR, DAYSPERLYEAR
335 };
336
337 static struct attype {
338 zic_t at;
339 unsigned char type;
340 } attypes[TZ_MAX_TIMES];
341 static long gmtoffs[TZ_MAX_TYPES];
342 static char isdsts[TZ_MAX_TYPES];
343 static unsigned char abbrinds[TZ_MAX_TYPES];
344 static char ttisstds[TZ_MAX_TYPES];
345 static char ttisgmts[TZ_MAX_TYPES];
346 static char chars[TZ_MAX_CHARS];
347 static zic_t trans[TZ_MAX_LEAPS];
348 static long corr[TZ_MAX_LEAPS];
349 static char roll[TZ_MAX_LEAPS];
350
351 /*
352 * Memory allocation.
353 */
354
355 static char *
356 memcheck(ptr)
357 char * const ptr;
358 {
359 if (ptr == NULL) {
360 const char *e = strerror(errno);
361 (void) fprintf(stderr, gettext("%s: Memory exhausted: %s\n"),
362 progname, e);
363 exit(EXIT_FAILURE);
364 }
365 return (ptr);
366 }
367
368 #define emalloc(size) memcheck(imalloc(size))
369 #define erealloc(ptr, size) memcheck(irealloc((ptr), (size)))
370 #define ecpyalloc(ptr) memcheck(icpyalloc(ptr))
371 #define ecatalloc(oldp, newp) memcheck(icatalloc((oldp), (newp)))
372
373 /*
374 * Error handling.
375 */
376
377 static void
378 eats(name, num, rname, rnum)
379 const char * const name;
380 const int num;
381 const char * const rname;
382 const int rnum;
383 {
384 filename = name;
385 linenum = num;
386 rfilename = rname;
387 rlinenum = rnum;
388 }
389
390 static void
391 eat(name, num)
392 const char * const name;
393 const int num;
394 {
395 eats(name, num, (char *)NULL, -1);
396 }
397
398 static void
399 error(string)
400 const char * const string;
401 {
402 /*
403 * Match the format of "cc" to allow sh users to
404 * zic ... 2>&1 | error -t "*" -v
405 * on BSD systems.
406 */
407 (void) fprintf(stderr, gettext("\"%s\", line %d: %s"),
408 filename, linenum, string);
409 if (rfilename != NULL)
410 (void) fprintf(stderr, gettext(" (rule from \"%s\", line %d)"),
411 rfilename, rlinenum);
412 (void) fprintf(stderr, "\n");
413 ++errors;
414 }
415
416 static void
417 warning(string)
418 const char * const string;
419 {
420 char *cp;
421
422 cp = ecpyalloc(gettext("warning: "));
423 cp = ecatalloc(cp, string);
424 error(cp);
425 ifree(cp);
426 --errors;
427 }
428
429 static void
430 usage(void)
431 {
432 #ifdef LEAPSECOND_SUPPORT
433 (void) fprintf(stderr, gettext("%s: usage is %s "
434 "[ --version ] [ -s ] [ -v ] [ -l localtime ] "
435 "\n\t[ -p posixrules ] [ -d directory ] [ -L leapseconds ] "
436 "[ -y yearistype ] [ filename ... ]\n"), progname, progname);
437 #else /* ! LEAPSECOND_SUPPORT */
438 (void) fprintf(stderr, gettext("%s: usage is %s "
439 "[ --version ] [ -s ] [ -v ] [ -l localtime ]"
440 "\n\t[ -p posixrules ] [ -d directory ] [ -y yearistype ] "
441 "[ filename ... ]\n"), progname, progname);
442 #endif /* LEAPSECOND_SUPPORT */
443 }
444
445 static const char *psxrules;
446 static const char *lcltime;
447 static const char *directory;
448 static const char *leapsec;
449 static const char *yitcommand;
450 static int sflag = FALSE;
451
452 int
453 main(argc, argv)
454 int argc;
455 char *argv[];
456 {
457 register int i;
458 register int j;
459 register int c;
460
461 (void) umask(umask(S_IWGRP | S_IWOTH) | (S_IWGRP | S_IWOTH));
462
463 (void) setlocale(LC_ALL, "");
464 #if !defined(TEXT_DOMAIN)
465 #define TEXT_DOMAIN "SYS_TEST"
466 #endif
467 (void) textdomain(TEXT_DOMAIN);
468
469 progname = argv[0];
470 for (i = 1; i < argc; ++i)
471 if (strcmp(argv[i], "--version") == 0) {
472 (void) printf("%s\n", elsieid);
473 exit(EXIT_SUCCESS);
474 }
475
476 #ifdef LEAPSECOND_SUPPORT
477 while ((c = getopt(argc, argv, "d:l:p:L:vsy:")) != EOF)
478 #else
479 while ((c = getopt(argc, argv, "d:l:p:vsy:")) != EOF)
480 #endif
481 switch (c) {
482 default:
483 usage();
484 case 'd':
485 if (directory == NULL)
486 directory = optarg;
487 else {
488 (void) fprintf(stderr, gettext(
489 "%s: More than one -d option specified\n"),
490 progname);
491 exit(EXIT_FAILURE);
492 }
493 break;
494 case 'l':
495 if (lcltime == NULL)
496 lcltime = optarg;
497 else {
498 (void) fprintf(stderr, gettext(
499 "%s: More than one -l option specified\n"),
500 progname);
501 exit(EXIT_FAILURE);
502 }
503 break;
504 case 'p':
505 if (psxrules == NULL)
506 psxrules = optarg;
507 else {
508 (void) fprintf(stderr, gettext(
509 "%s: More than one -p option specified\n"),
510 progname);
511 exit(EXIT_FAILURE);
512 }
513 break;
514 case 'y':
515 if (yitcommand == NULL)
516 yitcommand = optarg;
517 else {
518 (void) fprintf(stderr, gettext(
519 "%s: More than one -y option specified\n"),
520 progname);
521 exit(EXIT_FAILURE);
522 }
523 break;
524 #ifdef LEAPSECOND_SUPPORT
525 case 'L':
526 if (leapsec == NULL)
527 leapsec = optarg;
528 else {
529 (void) fprintf(stderr, gettext(
530 "%s: More than one -L option specified\n"),
531 progname);
532 exit(EXIT_FAILURE);
533 }
534 break;
535 #endif /* LEAPSECOND_SUPPORT */
536 case 'v':
537 noise = TRUE;
538 break;
539 case 's':
540 sflag = TRUE;
541 break;
542 }
543 if (optind == argc - 1 && strcmp(argv[optind], "=") == 0)
544 usage(); /* usage message by request */
545 if (directory == NULL)
546 directory = TZDIR;
547 if (yitcommand == NULL)
548 yitcommand = "yearistype";
549
550 setboundaries();
551
552 #ifdef LEAPSECOND_SUPPORT
553 if (optind < argc && leapsec != NULL) {
554 infile(leapsec);
555 adjleap();
556 }
557 #endif /* LEAPSECOND_SUPPORT */
558
559 for (i = optind; i < argc; ++i)
560 infile(argv[i]);
561 if (errors)
562 exit(EXIT_FAILURE);
563 associate();
564 for (i = 0; i < nzones; i = j) {
565 /*
566 * Find the next non-continuation zone entry.
567 */
568 for (j = i + 1; j < nzones && zones[j].z_name == NULL; ++j)
569 continue;
570 outzone(&zones[i], j - i);
571 }
572 /*
573 * Make links.
574 */
575 for (i = 0; i < nlinks; ++i) {
576 eat(links[i].l_filename, links[i].l_linenum);
577 dolink(links[i].l_from, links[i].l_to);
578 if (noise)
579 for (j = 0; j < nlinks; ++j)
580 if (strcmp(links[i].l_to, links[j].l_from) == 0)
581 warning(gettext("link to link"));
582 }
583 if (lcltime != NULL) {
584 eat("command line", 1);
585 dolink(lcltime, TZDEFAULT);
586 }
587 if (psxrules != NULL) {
588 eat("command line", 1);
589 dolink(psxrules, TZDEFRULES);
590 }
591 return ((errors == 0) ? EXIT_SUCCESS : EXIT_FAILURE);
592 }
593
594 static void
595 dolink(fromfield, tofield)
596 const char * const fromfield;
597 const char * const tofield;
598 {
599 register char *fromname;
600 register char *toname;
601
602 if (fromfield[0] == '/')
603 fromname = ecpyalloc(fromfield);
604 else {
605 fromname = ecpyalloc(directory);
606 fromname = ecatalloc(fromname, "/");
607 fromname = ecatalloc(fromname, fromfield);
608 }
609 if (tofield[0] == '/')
610 toname = ecpyalloc(tofield);
611 else {
612 toname = ecpyalloc(directory);
613 toname = ecatalloc(toname, "/");
614 toname = ecatalloc(toname, tofield);
615 }
616 /*
617 * We get to be careful here since
618 * there's a fair chance of root running us.
619 */
620 if (!itsdir(toname))
621 (void) remove(toname);
622 if (link(fromname, toname) != 0) {
623 int result;
624
625 if (mkdirs(toname) != 0)
626 exit(EXIT_FAILURE);
627
628 result = link(fromname, toname);
629
630 if (result != 0 && access(fromname, F_OK) == 0 &&
631 !itsdir(fromname)) {
632 const char *s = tofield;
633 register char *symlinkcontents = NULL;
634
635 while ((s = strchr(s+1, '/')) != NULL)
636 symlinkcontents = ecatalloc(symlinkcontents,
637 "../");
638 symlinkcontents = ecatalloc(symlinkcontents, fromname);
639 result = symlink(symlinkcontents, toname);
640 if (result == 0)
641 warning(gettext(
642 "hard link failed, symbolic link used"));
643 ifree(symlinkcontents);
644 }
645
646 if (result != 0) {
647 const char *e = strerror(errno);
648
649 (void) fprintf(stderr, gettext(
650 "%s: Can't link from %s to %s: %s\n"),
651 progname, fromname, toname, e);
652 exit(EXIT_FAILURE);
653 }
654 }
655 ifree(fromname);
656 ifree(toname);
657 }
658
659 #ifndef INT_MAX
660 #define INT_MAX ((int)(((unsigned)~0)>>1))
661 #endif /* !defined INT_MAX */
662
663 #ifndef INT_MIN
664 #define INT_MIN ((int)~(((unsigned)~0)>>1))
665 #endif /* !defined INT_MIN */
666
667 /*
668 * The tz file format currently allows at most 32-bit quantities.
669 * This restriction should be removed before signed 32-bit values
670 * wrap around in 2038, but unfortunately this will require a
671 * change to the tz file format.
672 */
673
674 #define MAX_BITS_IN_FILE 32
675 /* CSTYLED */
676 #define TIME_T_BITS_IN_FILE ((TYPE_BIT(zic_t) < MAX_BITS_IN_FILE) ? \
677 TYPE_BIT(zic_t): MAX_BITS_IN_FILE)
678
679 static void
680 setboundaries(void)
681 {
682 register int i;
683
684 if (TYPE_SIGNED(zic_t)) {
685 min_time = -1;
686 for (i = 0; i < TIME_T_BITS_IN_FILE - 1; ++i)
687 min_time *= 2;
688 max_time = -(min_time + 1);
689 if (sflag)
690 min_time = 0;
691 } else {
692 min_time = 0;
693 max_time = 2 - sflag;
694 for (i = 0; i < TIME_T_BITS_IN_FILE - 1; ++i)
695 max_time *= 2;
696 --max_time;
697 }
698 {
699 time_t t;
700
701 t = (time_t)min_time;
702 min_year = TM_YEAR_BASE + gmtime(&t)->tm_year;
703 t = (time_t)max_time;
704 max_year = TM_YEAR_BASE + gmtime(&t)->tm_year;
705 }
706 min_year_representable = min_year;
707 max_year_representable = max_year;
708 }
709
710 static int
711 itsdir(name)
712 const char * const name;
713 {
714 register char *myname;
715 register int accres;
716
717 myname = ecpyalloc(name);
718 myname = ecatalloc(myname, "/.");
719 accres = access(myname, F_OK);
720 ifree(myname);
721 return (accres == 0);
722 }
723
724 /*
725 * Associate sets of rules with zones.
726 */
727
728 /*
729 * Sort by rule name.
730 */
731
732 static int
733 rcomp(cp1, cp2)
734 const void * cp1;
735 const void * cp2;
736 {
737 return (strcmp(((const struct rule *) cp1)->r_name,
738 ((const struct rule *) cp2)->r_name));
739 }
740
741 static void
742 associate(void)
743 {
744 register struct zone *zp;
745 register struct rule *rp;
746 register int base, out;
747 register int i, j;
748
749 if (nrules != 0) {
750 (void) qsort((void *)rules, (size_t)nrules,
751 (size_t)sizeof (*rules), rcomp);
752 for (i = 0; i < nrules - 1; ++i) {
753 if (strcmp(rules[i].r_name,
754 rules[i + 1].r_name) != 0)
755 continue;
756 if (strcmp(rules[i].r_filename,
757 rules[i + 1].r_filename) == 0)
758 continue;
759 eat(rules[i].r_filename, rules[i].r_linenum);
760 warning(gettext("same rule name in multiple files"));
761 eat(rules[i + 1].r_filename, rules[i + 1].r_linenum);
762 warning(gettext("same rule name in multiple files"));
763 for (j = i + 2; j < nrules; ++j) {
764 if (strcmp(rules[i].r_name,
765 rules[j].r_name) != 0)
766 break;
767 if (strcmp(rules[i].r_filename,
768 rules[j].r_filename) == 0)
769 continue;
770 if (strcmp(rules[i + 1].r_filename,
771 rules[j].r_filename) == 0)
772 continue;
773 break;
774 }
775 i = j - 1;
776 }
777 }
778 for (i = 0; i < nzones; ++i) {
779 zp = &zones[i];
780 zp->z_rules = NULL;
781 zp->z_nrules = 0;
782 }
783 for (base = 0; base < nrules; base = out) {
784 rp = &rules[base];
785 for (out = base + 1; out < nrules; ++out)
786 if (strcmp(rp->r_name, rules[out].r_name) != 0)
787 break;
788 for (i = 0; i < nzones; ++i) {
789 zp = &zones[i];
790 if (strcmp(zp->z_rule, rp->r_name) != 0)
791 continue;
792 zp->z_rules = rp;
793 zp->z_nrules = out - base;
794 }
795 }
796 for (i = 0; i < nzones; ++i) {
797 zp = &zones[i];
798 if (zp->z_nrules == 0) {
799 /*
800 * Maybe we have a local standard time offset.
801 */
802 eat(zp->z_filename, zp->z_linenum);
803 zp->z_stdoff = gethms(zp->z_rule,
804 gettext("unruly zone"), TRUE);
805 /*
806 * Note, though, that if there's no rule,
807 * a '%s' in the format is a bad thing.
808 */
809 if (strchr(zp->z_format, '%') != 0)
810 error(gettext("%s in ruleless zone"));
811 }
812 }
813 if (errors)
814 exit(EXIT_FAILURE);
815 }
816
817 static void
818 infile(name)
819 const char *name;
820 {
821 register FILE *fp;
822 register char **fields;
823 register char *cp;
824 register const struct lookup *lp;
825 register int nfields;
826 register int wantcont;
827 register int num;
828 char buf[BUFSIZ];
829
830 if (strcmp(name, "-") == 0) {
831 name = gettext("standard input");
832 fp = stdin;
833 } else if ((fp = fopen(name, "r")) == NULL) {
834 const char *e = strerror(errno);
835
836 (void) fprintf(stderr, gettext("%s: Can't open %s: %s\n"),
837 progname, name, e);
838 exit(EXIT_FAILURE);
839 }
840 wantcont = FALSE;
841 for (num = 1; ; ++num) {
842 eat(name, num);
843 if (fgets(buf, (int)sizeof (buf), fp) != buf)
844 break;
845 cp = strchr(buf, '\n');
846 if (cp == NULL) {
847 error(gettext("line too long"));
848 exit(EXIT_FAILURE);
849 }
850 *cp = '\0';
851 fields = getfields(buf);
852 nfields = 0;
853 while (fields[nfields] != NULL) {
854 static char nada;
855
856 if (strcmp(fields[nfields], "-") == 0)
857 fields[nfields] = &nada;
858 ++nfields;
859 }
860 if (nfields == 0) {
861 /* nothing to do */
862 } else if (wantcont) {
863 wantcont = inzcont(fields, nfields);
864 } else {
865 lp = byword(fields[0], line_codes);
866 if (lp == NULL)
867 error(gettext("input line of unknown type"));
868 else switch ((int)(lp->l_value)) {
869 case LC_RULE:
870 inrule(fields, nfields);
871 wantcont = FALSE;
872 break;
873 case LC_ZONE:
874 wantcont = inzone(fields, nfields);
875 break;
876 case LC_LINK:
877 inlink(fields, nfields);
878 wantcont = FALSE;
879 break;
880 #ifdef LEAPSECOND_SUPPORT
881 case LC_LEAP:
882 if (name != leapsec)
883 (void) fprintf(stderr, gettext(
884 "%s: Leap line in non leap seconds file %s\n"),
885 progname, name);
886 else inleap(fields, nfields);
887 wantcont = FALSE;
888 break;
889 #endif /* LEAPSECOND_SUPPORT */
890 default: /* "cannot happen" */
891 (void) fprintf(stderr, gettext(
892 "%s: panic: Invalid l_value %d\n"),
893 progname, lp->l_value);
894 exit(EXIT_FAILURE);
895 }
896 }
897 ifree((char *)fields);
898 }
899 if (ferror(fp)) {
900 (void) fprintf(stderr, gettext("%s: Error reading %s\n"),
901 progname, filename);
902 exit(EXIT_FAILURE);
903 }
904 if (fp != stdin && fclose(fp)) {
905 const char *e = strerror(errno);
906 (void) fprintf(stderr, gettext("%s: Error closing %s: %s\n"),
907 progname, filename, e);
908 exit(EXIT_FAILURE);
909 }
910 if (wantcont)
911 error(gettext("expected continuation line not found"));
912 }
913
914 /*
915 * Convert a string of one of the forms
916 * h -h hh:mm -hh:mm hh:mm:ss -hh:mm:ss
917 * into a number of seconds.
918 * A null string maps to zero.
919 * Call error with errstring and return zero on errors.
920 */
921
922 static long
923 gethms(string, errstring, signable)
924 const char *string;
925 const char * const errstring;
926 const int signable;
927 {
928 long hh;
929 int mm, ss, sign;
930
931 if (string == NULL || *string == '\0')
932 return (0);
933 if (!signable)
934 sign = 1;
935 else if (*string == '-') {
936 sign = -1;
937 ++string;
938 } else sign = 1;
939 if (sscanf(string, scheck(string, "%ld"), &hh) == 1)
940 mm = ss = 0;
941 else if (sscanf(string, scheck(string, "%ld:%d"), &hh, &mm) == 2)
942 ss = 0;
943 else if (sscanf(string, scheck(string, "%ld:%d:%d"),
944 &hh, &mm, &ss) != 3) {
945 error(errstring);
946 return (0);
947 }
948 if (hh < 0 ||
949 mm < 0 || mm >= MINSPERHOUR ||
950 ss < 0 || ss > SECSPERMIN) {
951 error(errstring);
952 return (0);
953 }
954 if (LONG_MAX / SECSPERHOUR < hh) {
955 error(gettext("time overflow"));
956 return (0);
957 }
958 if (noise && hh == HOURSPERDAY && mm == 0 && ss == 0)
959 warning(
960 gettext("24:00 not handled by pre-1998 versions of zic"));
961 if (noise && (hh > HOURSPERDAY ||
962 (hh == HOURSPERDAY && (mm != 0 || ss != 0))))
963 warning(gettext("values over 24 hours not handled by "
964 "pre-2007 versions of zic"));
965
966 return (oadd(eitol(sign) * hh * eitol(SECSPERHOUR),
967 eitol(sign) * (eitol(mm) * eitol(SECSPERMIN) + eitol(ss))));
968 }
969
970 static void
971 inrule(fields, nfields)
972 register char ** const fields;
973 const int nfields;
974 {
975 static struct rule r;
976
977 if (nfields != RULE_FIELDS) {
978 error(gettext("wrong number of fields on Rule line"));
979 return;
980 }
981 if (*fields[RF_NAME] == '\0') {
982 error(gettext("nameless rule"));
983 return;
984 }
985 r.r_filename = filename;
986 r.r_linenum = linenum;
987 r.r_stdoff = gethms(fields[RF_STDOFF], gettext("invalid saved time"),
988 TRUE);
989 rulesub(&r, fields[RF_LOYEAR], fields[RF_HIYEAR], fields[RF_COMMAND],
990 fields[RF_MONTH], fields[RF_DAY], fields[RF_TOD]);
991 r.r_name = ecpyalloc(fields[RF_NAME]);
992 r.r_abbrvar = ecpyalloc(fields[RF_ABBRVAR]);
993 rules = (struct rule *)(void *)erealloc((char *)rules,
994 (int)((nrules + 1) * sizeof (*rules)));
995 rules[nrules++] = r;
996 }
997
998 static int
999 inzone(fields, nfields)
1000 register char ** const fields;
1001 const int nfields;
1002 {
1003 register int i;
1004 static char *buf;
1005
1006 if (nfields < ZONE_MINFIELDS || nfields > ZONE_MAXFIELDS) {
1007 error(gettext("wrong number of fields on Zone line"));
1008 return (FALSE);
1009 }
1010 if (strcmp(fields[ZF_NAME], TZDEFAULT) == 0 && lcltime != NULL) {
1011 buf = erealloc(buf, (int)(132 + strlen(TZDEFAULT)));
1012 (void) sprintf(buf,
1013 gettext("\"Zone %s\" line and -l option are mutually exclusive"),
1014 TZDEFAULT);
1015 error(buf);
1016 return (FALSE);
1017 }
1018 if (strcmp(fields[ZF_NAME], TZDEFRULES) == 0 && psxrules != NULL) {
1019 buf = erealloc(buf, (int)(132 + strlen(TZDEFRULES)));
1020 (void) sprintf(buf,
1021 gettext("\"Zone %s\" line and -p option are mutually exclusive"),
1022 TZDEFRULES);
1023 error(buf);
1024 return (FALSE);
1025 }
1026 for (i = 0; i < nzones; ++i)
1027 if (zones[i].z_name != NULL &&
1028 strcmp(zones[i].z_name, fields[ZF_NAME]) == 0) {
1029 buf = erealloc(buf, (int)(132 +
1030 strlen(fields[ZF_NAME]) +
1031 strlen(zones[i].z_filename)));
1032 (void) sprintf(buf,
1033 gettext("duplicate zone name %s (file \"%s\", line %d)"),
1034 fields[ZF_NAME],
1035 zones[i].z_filename,
1036 zones[i].z_linenum);
1037 error(buf);
1038 return (FALSE);
1039 }
1040 return (inzsub(fields, nfields, FALSE));
1041 }
1042
1043 static int
1044 inzcont(fields, nfields)
1045 register char ** const fields;
1046 const int nfields;
1047 {
1048 if (nfields < ZONEC_MINFIELDS || nfields > ZONEC_MAXFIELDS) {
1049 error(gettext(
1050 "wrong number of fields on Zone continuation line"));
1051 return (FALSE);
1052 }
1053 return (inzsub(fields, nfields, TRUE));
1054 }
1055
1056 static int
1057 inzsub(fields, nfields, iscont)
1058 register char ** const fields;
1059 const int nfields;
1060 const int iscont;
1061 {
1062 register char *cp;
1063 static struct zone z;
1064 register int i_gmtoff, i_rule, i_format;
1065 register int i_untilyear, i_untilmonth;
1066 register int i_untilday, i_untiltime;
1067 register int hasuntil;
1068
1069 if (iscont) {
1070 i_gmtoff = ZFC_GMTOFF;
1071 i_rule = ZFC_RULE;
1072 i_format = ZFC_FORMAT;
1073 i_untilyear = ZFC_TILYEAR;
1074 i_untilmonth = ZFC_TILMONTH;
1075 i_untilday = ZFC_TILDAY;
1076 i_untiltime = ZFC_TILTIME;
1077 z.z_name = NULL;
1078 } else {
1079 i_gmtoff = ZF_GMTOFF;
1080 i_rule = ZF_RULE;
1081 i_format = ZF_FORMAT;
1082 i_untilyear = ZF_TILYEAR;
1083 i_untilmonth = ZF_TILMONTH;
1084 i_untilday = ZF_TILDAY;
1085 i_untiltime = ZF_TILTIME;
1086 z.z_name = ecpyalloc(fields[ZF_NAME]);
1087 }
1088 z.z_filename = filename;
1089 z.z_linenum = linenum;
1090 z.z_gmtoff = gethms(fields[i_gmtoff], gettext("invalid UTC offset"),
1091 TRUE);
1092 if ((cp = strchr(fields[i_format], '%')) != 0) {
1093 if (*++cp != 's' || strchr(cp, '%') != 0) {
1094 error(gettext("invalid abbreviation format"));
1095 return (FALSE);
1096 }
1097 }
1098 z.z_rule = ecpyalloc(fields[i_rule]);
1099 z.z_format = ecpyalloc(fields[i_format]);
1100 hasuntil = nfields > i_untilyear;
1101 if (hasuntil) {
1102 z.z_untilrule.r_filename = filename;
1103 z.z_untilrule.r_linenum = linenum;
1104 rulesub(&z.z_untilrule,
1105 fields[i_untilyear],
1106 "only",
1107 "",
1108 (nfields > i_untilmonth) ?
1109 fields[i_untilmonth] : "Jan",
1110 (nfields > i_untilday) ? fields[i_untilday] : "1",
1111 (nfields > i_untiltime) ? fields[i_untiltime] : "0");
1112 z.z_untiltime = rpytime(&z.z_untilrule,
1113 z.z_untilrule.r_loyear);
1114 if (iscont && nzones > 0 &&
1115 z.z_untiltime > min_time &&
1116 z.z_untiltime < max_time &&
1117 zones[nzones - 1].z_untiltime > min_time &&
1118 zones[nzones - 1].z_untiltime < max_time &&
1119 zones[nzones - 1].z_untiltime >= z.z_untiltime) {
1120 error(gettext(
1121 "Zone continuation line end time is not after end time of previous line"));
1122 return (FALSE);
1123 }
1124 }
1125 zones = (struct zone *)(void *)erealloc((char *)zones,
1126 (int)((nzones + 1) * sizeof (*zones)));
1127 zones[nzones++] = z;
1128 /*
1129 * If there was an UNTIL field on this line,
1130 * there's more information about the zone on the next line.
1131 */
1132 return (hasuntil);
1133 }
1134
1135 #ifdef LEAPSECOND_SUPPORT
1136 static void
1137 inleap(fields, nfields)
1138 register char ** const fields;
1139 const int nfields;
1140 {
1141 register const char *cp;
1142 register const struct lookup *lp;
1143 register int i, j;
1144 int year, month, day;
1145 long dayoff, tod;
1146 zic_t t;
1147
1148 if (nfields != LEAP_FIELDS) {
1149 error(gettext("wrong number of fields on Leap line"));
1150 return;
1151 }
1152 dayoff = 0;
1153 cp = fields[LP_YEAR];
1154 if (sscanf(cp, scheck(cp, "%d"), &year) != 1) {
1155 /*
1156 * Leapin' Lizards!
1157 */
1158 error(gettext("invalid leaping year"));
1159 return;
1160 }
1161 j = EPOCH_YEAR;
1162 while (j != year) {
1163 if (year > j) {
1164 i = len_years[isleap(j)];
1165 ++j;
1166 } else {
1167 --j;
1168 i = -len_years[isleap(j)];
1169 }
1170 dayoff = oadd(dayoff, eitol(i));
1171 }
1172 if ((lp = byword(fields[LP_MONTH], mon_names)) == NULL) {
1173 error(gettext("invalid month name"));
1174 return;
1175 }
1176 month = lp->l_value;
1177 j = TM_JANUARY;
1178 while (j != month) {
1179 i = len_months[isleap(year)][j];
1180 dayoff = oadd(dayoff, eitol(i));
1181 ++j;
1182 }
1183 cp = fields[LP_DAY];
1184 if (sscanf(cp, scheck(cp, "%d"), &day) != 1 ||
1185 day <= 0 || day > len_months[isleap(year)][month]) {
1186 error(gettext("invalid day of month"));
1187 return;
1188 }
1189 dayoff = oadd(dayoff, eitol(day - 1));
1190 if (dayoff < 0 && !TYPE_SIGNED(zic_t)) {
1191 error(gettext("time before zero"));
1192 return;
1193 }
1194 if (dayoff < min_time / SECSPERDAY) {
1195 error(gettext("time too small"));
1196 return;
1197 }
1198 if (dayoff > max_time / SECSPERDAY) {
1199 error(gettext("time too large"));
1200 return;
1201 }
1202 t = (zic_t)dayoff * SECSPERDAY;
1203 tod = gethms(fields[LP_TIME], gettext("invalid time of day"), FALSE);
1204 cp = fields[LP_CORR];
1205 {
1206 register int positive;
1207 int count;
1208
1209 if (strcmp(cp, "") == 0) { /* infile() turns "-" into "" */
1210 positive = FALSE;
1211 count = 1;
1212 } else if (strcmp(cp, "--") == 0) {
1213 positive = FALSE;
1214 count = 2;
1215 } else if (strcmp(cp, "+") == 0) {
1216 positive = TRUE;
1217 count = 1;
1218 } else if (strcmp(cp, "++") == 0) {
1219 positive = TRUE;
1220 count = 2;
1221 } else {
1222 error(gettext("illegal CORRECTION field on Leap line"));
1223 return;
1224 }
1225 if ((lp = byword(fields[LP_ROLL], leap_types)) == NULL) {
1226 error(gettext(
1227 "illegal Rolling/Stationary field on Leap line"));
1228 return;
1229 }
1230 leapadd(tadd(t, tod), positive, lp->l_value, count);
1231 }
1232 }
1233 #endif /* LEAPSECOND_SUPPORT */
1234
1235 static void
1236 inlink(fields, nfields)
1237 register char ** const fields;
1238 const int nfields;
1239 {
1240 struct link l;
1241
1242 if (nfields != LINK_FIELDS) {
1243 error(gettext("wrong number of fields on Link line"));
1244 return;
1245 }
1246 if (*fields[LF_FROM] == '\0') {
1247 error(gettext("blank FROM field on Link line"));
1248 return;
1249 }
1250 if (*fields[LF_TO] == '\0') {
1251 error(gettext("blank TO field on Link line"));
1252 return;
1253 }
1254 l.l_filename = filename;
1255 l.l_linenum = linenum;
1256 l.l_from = ecpyalloc(fields[LF_FROM]);
1257 l.l_to = ecpyalloc(fields[LF_TO]);
1258 links = (struct link *)(void *)erealloc((char *)links,
1259 (int)((nlinks + 1) * sizeof (*links)));
1260 links[nlinks++] = l;
1261 }
1262
1263 static void
1264 rulesub(rp, loyearp, hiyearp, typep, monthp, dayp, timep)
1265 register struct rule * const rp;
1266 const char * const loyearp;
1267 const char * const hiyearp;
1268 const char * const typep;
1269 const char * const monthp;
1270 const char * const dayp;
1271 const char * const timep;
1272 {
1273 register const struct lookup *lp;
1274 register const char *cp;
1275 register char *dp;
1276 register char *ep;
1277
1278 if ((lp = byword(monthp, mon_names)) == NULL) {
1279 error(gettext("invalid month name"));
1280 return;
1281 }
1282 rp->r_month = lp->l_value;
1283 rp->r_todisstd = FALSE;
1284 rp->r_todisgmt = FALSE;
1285 dp = ecpyalloc(timep);
1286 if (*dp != '\0') {
1287 ep = dp + strlen(dp) - 1;
1288 switch (lowerit(*ep)) {
1289 case 's': /* Standard */
1290 rp->r_todisstd = TRUE;
1291 rp->r_todisgmt = FALSE;
1292 *ep = '\0';
1293 break;
1294 case 'w': /* Wall */
1295 rp->r_todisstd = FALSE;
1296 rp->r_todisgmt = FALSE;
1297 *ep = '\0';
1298 break;
1299 case 'g': /* Greenwich */
1300 case 'u': /* Universal */
1301 case 'z': /* Zulu */
1302 rp->r_todisstd = TRUE;
1303 rp->r_todisgmt = TRUE;
1304 *ep = '\0';
1305 break;
1306 }
1307 }
1308 rp->r_tod = gethms(dp, gettext("invalid time of day"), FALSE);
1309 ifree(dp);
1310 /*
1311 * Year work.
1312 */
1313 cp = loyearp;
1314 lp = byword(cp, begin_years);
1315 if (lp != NULL) {
1316 switch ((int)lp->l_value) {
1317 case YR_MINIMUM:
1318 rp->r_loyear = INT_MIN;
1319 break;
1320 case YR_MAXIMUM:
1321 rp->r_loyear = INT_MAX;
1322 break;
1323 default: /* "cannot happen" */
1324 (void) fprintf(stderr,
1325 gettext("%s: panic: Invalid l_value %d\n"),
1326 progname, lp->l_value);
1327 exit(EXIT_FAILURE);
1328 }
1329 } else if (sscanf(cp, scheck(cp, "%d"), &rp->r_loyear) != 1) {
1330 error(gettext("invalid starting year"));
1331 return;
1332 } else if (noise) {
1333 if (rp->r_loyear < min_year_representable)
1334 warning(gettext(
1335 "starting year too low to be represented"));
1336 else if (rp->r_loyear > max_year_representable)
1337 warning(gettext(
1338 "starting year too high to be represented"));
1339 }
1340 cp = hiyearp;
1341 if ((lp = byword(cp, end_years)) != NULL) {
1342 switch ((int)lp->l_value) {
1343 case YR_MINIMUM:
1344 rp->r_hiyear = INT_MIN;
1345 break;
1346 case YR_MAXIMUM:
1347 rp->r_hiyear = INT_MAX;
1348 break;
1349 case YR_ONLY:
1350 rp->r_hiyear = rp->r_loyear;
1351 break;
1352 default: /* "cannot happen" */
1353 (void) fprintf(stderr,
1354 gettext("%s: panic: Invalid l_value %d\n"),
1355 progname, lp->l_value);
1356 exit(EXIT_FAILURE);
1357 }
1358 } else if (sscanf(cp, scheck(cp, "%d"), &rp->r_hiyear) != 1) {
1359 error(gettext("invalid ending year"));
1360 return;
1361 } else if (noise) {
1362 if (rp->r_loyear < min_year_representable)
1363 warning(gettext(
1364 "ending year too low to be represented"));
1365 else if (rp->r_loyear > max_year_representable)
1366 warning(gettext(
1367 "ending year too high to be represented"));
1368 }
1369 if (rp->r_loyear > rp->r_hiyear) {
1370 error(gettext("starting year greater than ending year"));
1371 return;
1372 }
1373 if (*typep == '\0')
1374 rp->r_yrtype = NULL;
1375 else {
1376 if (rp->r_loyear == rp->r_hiyear) {
1377 error(gettext("typed single year"));
1378 return;
1379 }
1380 rp->r_yrtype = ecpyalloc(typep);
1381 }
1382 if (rp->r_loyear < min_year && rp->r_loyear > 0)
1383 min_year = rp->r_loyear;
1384 /*
1385 * Day work.
1386 * Accept things such as:
1387 * 1
1388 * last-Sunday
1389 * Sun<=20
1390 * Sun>=7
1391 */
1392 dp = ecpyalloc(dayp);
1393 if ((lp = byword(dp, lasts)) != NULL) {
1394 rp->r_dycode = DC_DOWLEQ;
1395 rp->r_wday = lp->l_value;
1396 rp->r_dayofmonth = len_months[1][rp->r_month];
1397 } else {
1398 if ((ep = strchr(dp, '<')) != 0)
1399 rp->r_dycode = DC_DOWLEQ;
1400 else if ((ep = strchr(dp, '>')) != 0)
1401 rp->r_dycode = DC_DOWGEQ;
1402 else {
1403 ep = dp;
1404 rp->r_dycode = DC_DOM;
1405 }
1406 if (rp->r_dycode != DC_DOM) {
1407 *ep++ = 0;
1408 if (*ep++ != '=') {
1409 error(gettext("invalid day of month"));
1410 ifree(dp);
1411 return;
1412 }
1413 if ((lp = byword(dp, wday_names)) == NULL) {
1414 error(gettext("invalid weekday name"));
1415 ifree(dp);
1416 return;
1417 }
1418 rp->r_wday = lp->l_value;
1419 }
1420 if (sscanf(ep, scheck(ep, "%d"), &rp->r_dayofmonth) != 1 ||
1421 rp->r_dayofmonth <= 0 ||
1422 (rp->r_dayofmonth > len_months[1][rp->r_month])) {
1423 error(gettext("invalid day of month"));
1424 ifree(dp);
1425 return;
1426 }
1427 }
1428 ifree(dp);
1429 }
1430
1431 static void
1432 convert(val, buf)
1433 const long val;
1434 char * const buf;
1435 {
1436 register int i;
1437 register long shift;
1438
1439 for (i = 0, shift = 24; i < 4; ++i, shift -= 8)
1440 buf[i] = val >> shift;
1441 }
1442
1443 static void
1444 puttzcode(val, fp)
1445 const long val;
1446 FILE * const fp;
1447 {
1448 char buf[4];
1449
1450 convert(val, buf);
1451 (void) fwrite((void *)buf, (size_t)sizeof (buf), (size_t)1, fp);
1452 }
1453
1454 static int
1455 atcomp(avp, bvp)
1456 const void *avp;
1457 const void *bvp;
1458 {
1459 if (((struct attype *)avp)->at < ((struct attype *)bvp)->at)
1460 return (-1);
1461 else if (((struct attype *)avp)->at > ((struct attype *)bvp)->at)
1462 return (1);
1463 else return (0);
1464 }
1465
1466 static void
1467 writezone(name)
1468 const char * const name;
1469 {
1470 register FILE *fp;
1471 register int i, j;
1472 static char *fullname;
1473 static struct tzhead tzh;
1474 zic_t ats[TZ_MAX_TIMES];
1475 unsigned char types[TZ_MAX_TIMES];
1476
1477 /*
1478 * Sort.
1479 */
1480 if (timecnt > 1)
1481 (void) qsort((void *)attypes, (size_t)timecnt,
1482 (size_t)sizeof (*attypes), atcomp);
1483 /*
1484 * Optimize.
1485 */
1486 {
1487 int fromi;
1488 int toi;
1489
1490 toi = 0;
1491 fromi = 0;
1492 while (fromi < timecnt && attypes[fromi].at < min_time)
1493 ++fromi;
1494 if (isdsts[0] == 0)
1495 while (fromi < timecnt && attypes[fromi].type == 0)
1496 ++fromi; /* handled by default rule */
1497 for (; fromi < timecnt; ++fromi) {
1498 if (toi != 0 && ((attypes[fromi].at +
1499 gmtoffs[attypes[toi - 1].type]) <=
1500 (attypes[toi - 1].at + gmtoffs[toi == 1 ? 0
1501 : attypes[toi - 2].type]))) {
1502 attypes[toi - 1].type =
1503 attypes[fromi].type;
1504 continue;
1505 }
1506 if (toi == 0 ||
1507 attypes[toi - 1].type != attypes[fromi].type)
1508 attypes[toi++] = attypes[fromi];
1509 }
1510 timecnt = toi;
1511 }
1512 /*
1513 * Transfer.
1514 */
1515 for (i = 0; i < timecnt; ++i) {
1516 ats[i] = attypes[i].at;
1517 types[i] = attypes[i].type;
1518 }
1519 fullname = erealloc(fullname,
1520 (int)(strlen(directory) + 1 + strlen(name) + 1));
1521 (void) sprintf(fullname, "%s/%s", directory, name);
1522 /*
1523 * Remove old file, if any, to snap links.
1524 */
1525 if (!itsdir(fullname) && remove(fullname) != 0 && errno != ENOENT) {
1526 const char *e = strerror(errno);
1527
1528 (void) fprintf(stderr, gettext("%s: Can't remove %s: %s\n"),
1529 progname, fullname, e);
1530 exit(EXIT_FAILURE);
1531 }
1532 if ((fp = fopen(fullname, "wb")) == NULL) {
1533 if (mkdirs(fullname) != 0)
1534 exit(EXIT_FAILURE);
1535 if ((fp = fopen(fullname, "wb")) == NULL) {
1536 const char *e = strerror(errno);
1537 (void) fprintf(stderr, gettext(
1538 "%s: Can't create %s: %s\n"),
1539 progname, fullname, e);
1540 exit(EXIT_FAILURE);
1541 }
1542 }
1543 convert(eitol(typecnt), tzh.tzh_ttisgmtcnt);
1544 convert(eitol(typecnt), tzh.tzh_ttisstdcnt);
1545 convert(eitol(leapcnt), tzh.tzh_leapcnt);
1546 convert(eitol(timecnt), tzh.tzh_timecnt);
1547 convert(eitol(typecnt), tzh.tzh_typecnt);
1548 convert(eitol(charcnt), tzh.tzh_charcnt);
1549 (void) strncpy(tzh.tzh_magic, TZ_MAGIC, sizeof (tzh.tzh_magic));
1550 #define DO(field) (void) fwrite((void *) tzh.field, \
1551 (size_t)sizeof (tzh.field), (size_t)1, fp)
1552 DO(tzh_magic);
1553 DO(tzh_reserved);
1554 DO(tzh_ttisgmtcnt);
1555 DO(tzh_ttisstdcnt);
1556 DO(tzh_leapcnt);
1557 DO(tzh_timecnt);
1558 DO(tzh_typecnt);
1559 DO(tzh_charcnt);
1560 #undef DO
1561 for (i = 0; i < timecnt; ++i) {
1562 j = leapcnt;
1563 while (--j >= 0)
1564 if (ats[i] >= trans[j]) {
1565 ats[i] = tadd(ats[i], corr[j]);
1566 break;
1567 }
1568 puttzcode((long)ats[i], fp);
1569 }
1570 if (timecnt > 0)
1571 (void) fwrite((void *)types, (size_t)sizeof (types[0]),
1572 (size_t)timecnt, fp);
1573 for (i = 0; i < typecnt; ++i) {
1574 puttzcode((long)gmtoffs[i], fp);
1575 (void) putc(isdsts[i], fp);
1576 (void) putc(abbrinds[i], fp);
1577 }
1578 if (charcnt != 0)
1579 (void) fwrite((void *)chars, (size_t)sizeof (chars[0]),
1580 (size_t)charcnt, fp);
1581 for (i = 0; i < leapcnt; ++i) {
1582 if (roll[i]) {
1583 if (timecnt == 0 || trans[i] < ats[0]) {
1584 j = 0;
1585 while (isdsts[j])
1586 if (++j >= typecnt) {
1587 j = 0;
1588 break;
1589 }
1590 } else {
1591 j = 1;
1592 while (j < timecnt && trans[i] >= ats[j])
1593 ++j;
1594 j = types[j - 1];
1595 }
1596 puttzcode((long)tadd(trans[i], -gmtoffs[j]), fp);
1597 } else puttzcode((long)trans[i], fp);
1598 puttzcode((long)corr[i], fp);
1599 }
1600 for (i = 0; i < typecnt; ++i)
1601 (void) putc(ttisstds[i], fp);
1602 for (i = 0; i < typecnt; ++i)
1603 (void) putc(ttisgmts[i], fp);
1604 if (ferror(fp) || fclose(fp)) {
1605 (void) fprintf(stderr, gettext("%s: Error writing %s\n"),
1606 progname, fullname);
1607 exit(EXIT_FAILURE);
1608 }
1609 }
1610
1611 static void
1612 doabbr(abbr, format, letters, isdst)
1613 char * const abbr;
1614 const char * const format;
1615 const char * const letters;
1616 const int isdst;
1617 {
1618 if (strchr(format, '/') == NULL) {
1619 if (letters == NULL)
1620 (void) strcpy(abbr, format);
1621 else
1622 (void) sprintf(abbr, format, letters);
1623 } else if (isdst)
1624 (void) strcpy(abbr, strchr(format, '/') + 1);
1625 else {
1626 (void) strcpy(abbr, format);
1627 *strchr(abbr, '/') = '\0';
1628 }
1629 }
1630
1631 static void
1632 outzone(zpfirst, zonecount)
1633 const struct zone * const zpfirst;
1634 const int zonecount;
1635 {
1636 register const struct zone *zp;
1637 register struct rule *rp;
1638 register int i, j;
1639 register int usestart, useuntil;
1640 register zic_t starttime, untiltime;
1641 register long gmtoff;
1642 register long stdoff;
1643 register int year;
1644 register long startoff;
1645 register int startttisstd;
1646 register int startttisgmt;
1647 register int type;
1648 char startbuf[BUFSIZ];
1649
1650 INITIALIZE(untiltime);
1651 INITIALIZE(starttime);
1652 /*
1653 * Now. . .finally. . .generate some useful data!
1654 */
1655 timecnt = 0;
1656 typecnt = 0;
1657 charcnt = 0;
1658 /*
1659 * Thanks to Earl Chew
1660 * for noting the need to unconditionally initialize startttisstd.
1661 */
1662 startttisstd = FALSE;
1663 startttisgmt = FALSE;
1664 for (i = 0; i < zonecount; ++i) {
1665 /*
1666 * A guess that may well be corrected later.
1667 */
1668 stdoff = 0;
1669 zp = &zpfirst[i];
1670 usestart = i > 0 && (zp - 1)->z_untiltime > min_time;
1671 useuntil = i < (zonecount - 1);
1672 if (useuntil && zp->z_untiltime <= min_time)
1673 continue;
1674 gmtoff = zp->z_gmtoff;
1675 eat(zp->z_filename, zp->z_linenum);
1676 *startbuf = '\0';
1677 startoff = zp->z_gmtoff;
1678 if (zp->z_nrules == 0) {
1679 stdoff = zp->z_stdoff;
1680 doabbr(startbuf, zp->z_format,
1681 (char *)NULL, stdoff != 0);
1682 type = addtype(oadd(zp->z_gmtoff, stdoff),
1683 startbuf, stdoff != 0, startttisstd,
1684 startttisgmt);
1685 if (usestart) {
1686 addtt(starttime, type);
1687 usestart = FALSE;
1688 } else if (stdoff != 0)
1689 addtt(min_time, type);
1690 } else
1691 for (year = min_year; year <= max_year; ++year) {
1692 if (useuntil && year > zp->z_untilrule.r_hiyear)
1693 break;
1694 /*
1695 * Mark which rules to do in the current year.
1696 * For those to do, calculate rpytime(rp, year);
1697 */
1698 for (j = 0; j < zp->z_nrules; ++j) {
1699 rp = &zp->z_rules[j];
1700 eats(zp->z_filename, zp->z_linenum,
1701 rp->r_filename, rp->r_linenum);
1702 rp->r_todo = year >= rp->r_loyear &&
1703 year <= rp->r_hiyear &&
1704 yearistype(year, rp->r_yrtype);
1705 if (rp->r_todo)
1706 rp->r_temp = rpytime(rp, year);
1707 }
1708 for (;;) {
1709 register int k;
1710 register zic_t jtime, ktime;
1711 register long offset;
1712 char buf[BUFSIZ];
1713
1714 INITIALIZE(ktime);
1715 if (useuntil) {
1716 /*
1717 * Turn untiltime into UTC * assuming
1718 * the current gmtoff and stdoff values.
1719 */
1720 untiltime = zp->z_untiltime;
1721 if (!zp->z_untilrule.r_todisgmt)
1722 untiltime = tadd(untiltime,
1723 -gmtoff);
1724 if (!zp->z_untilrule.r_todisstd)
1725 untiltime = tadd(untiltime,
1726 -stdoff);
1727 }
1728 /*
1729 * Find the rule (of those to do, if any)
1730 * that takes effect earliest in the year.
1731 */
1732 k = -1;
1733 for (j = 0; j < zp->z_nrules; ++j) {
1734 rp = &zp->z_rules[j];
1735 if (!rp->r_todo)
1736 continue;
1737 eats(zp->z_filename, zp->z_linenum,
1738 rp->r_filename, rp->r_linenum);
1739 offset = rp->r_todisgmt ? 0 : gmtoff;
1740 if (!rp->r_todisstd)
1741 offset = oadd(offset, stdoff);
1742 jtime = rp->r_temp;
1743 if (jtime == min_time ||
1744 jtime == max_time)
1745 continue;
1746 jtime = tadd(jtime, -offset);
1747 if (k < 0 || jtime < ktime) {
1748 k = j;
1749 ktime = jtime;
1750 }
1751 }
1752 if (k < 0)
1753 break; /* go on to next year */
1754 rp = &zp->z_rules[k];
1755 rp->r_todo = FALSE;
1756 if (useuntil && ktime >= untiltime)
1757 break;
1758 stdoff = rp->r_stdoff;
1759 if (usestart && ktime == starttime)
1760 usestart = FALSE;
1761 if (usestart) {
1762 if (ktime < starttime) {
1763 startoff = oadd(zp->z_gmtoff,
1764 stdoff);
1765 doabbr(startbuf, zp->z_format,
1766 rp->r_abbrvar,
1767 rp->r_stdoff != 0);
1768 continue;
1769 }
1770 if (*startbuf == '\0' &&
1771 startoff == oadd(zp->z_gmtoff,
1772 stdoff)) {
1773 doabbr(startbuf, zp->z_format,
1774 rp->r_abbrvar,
1775 rp->r_stdoff != 0);
1776 }
1777 }
1778 eats(zp->z_filename, zp->z_linenum,
1779 rp->r_filename, rp->r_linenum);
1780 doabbr(buf, zp->z_format, rp->r_abbrvar,
1781 rp->r_stdoff != 0);
1782 offset = oadd(zp->z_gmtoff, rp->r_stdoff);
1783 type = addtype(offset, buf, rp->r_stdoff != 0,
1784 rp->r_todisstd, rp->r_todisgmt);
1785 addtt(ktime, type);
1786 }
1787 }
1788 if (usestart) {
1789 if (*startbuf == '\0' &&
1790 zp->z_format != NULL &&
1791 strchr(zp->z_format, '%') == NULL &&
1792 strchr(zp->z_format, '/') == NULL)
1793 (void) strcpy(startbuf, zp->z_format);
1794 eat(zp->z_filename, zp->z_linenum);
1795 if (*startbuf == '\0')
1796 error(gettext(
1797 "can't determine time zone abbrevation to use just after until time"));
1798 else addtt(starttime,
1799 addtype(startoff, startbuf,
1800 startoff != zp->z_gmtoff,
1801 startttisstd,
1802 startttisgmt));
1803 }
1804 /*
1805 * Now we may get to set starttime for the next zone line.
1806 */
1807 if (useuntil) {
1808 startttisstd = zp->z_untilrule.r_todisstd;
1809 startttisgmt = zp->z_untilrule.r_todisgmt;
1810 starttime = zp->z_untiltime;
1811 if (!startttisstd)
1812 starttime = tadd(starttime, -stdoff);
1813 if (!startttisgmt)
1814 starttime = tadd(starttime, -gmtoff);
1815 }
1816 }
1817 writezone(zpfirst->z_name);
1818 }
1819
1820 static void
1821 addtt(starttime, type)
1822 const zic_t starttime;
1823 int type;
1824 {
1825 if (starttime <= min_time ||
1826 (timecnt == 1 && attypes[0].at < min_time)) {
1827 gmtoffs[0] = gmtoffs[type];
1828 isdsts[0] = isdsts[type];
1829 ttisstds[0] = ttisstds[type];
1830 ttisgmts[0] = ttisgmts[type];
1831 if (abbrinds[type] != 0)
1832 (void) strcpy(chars, &chars[abbrinds[type]]);
1833 abbrinds[0] = 0;
1834 charcnt = strlen(chars) + 1;
1835 typecnt = 1;
1836 timecnt = 0;
1837 type = 0;
1838 }
1839 if (timecnt >= TZ_MAX_TIMES) {
1840 error(gettext("too many transitions?!"));
1841 exit(EXIT_FAILURE);
1842 }
1843 attypes[timecnt].at = starttime;
1844 attypes[timecnt].type = type;
1845 ++timecnt;
1846 }
1847
1848 static int
1849 addtype(gmtoff, abbr, isdst, ttisstd, ttisgmt)
1850 const long gmtoff;
1851 const char * const abbr;
1852 const int isdst;
1853 const int ttisstd;
1854 const int ttisgmt;
1855 {
1856 register int i, j;
1857
1858 if (isdst != TRUE && isdst != FALSE) {
1859 error(gettext(
1860 "internal error - addtype called with bad isdst"));
1861 exit(EXIT_FAILURE);
1862 }
1863 if (ttisstd != TRUE && ttisstd != FALSE) {
1864 error(gettext(
1865 "internal error - addtype called with bad ttisstd"));
1866 exit(EXIT_FAILURE);
1867 }
1868 if (ttisgmt != TRUE && ttisgmt != FALSE) {
1869 error(gettext(
1870 "internal error - addtype called with bad ttisgmt"));
1871 exit(EXIT_FAILURE);
1872 }
1873 /*
1874 * See if there's already an entry for this zone type.
1875 * If so, just return its index.
1876 */
1877 for (i = 0; i < typecnt; ++i) {
1878 if (gmtoff == gmtoffs[i] && isdst == isdsts[i] &&
1879 strcmp(abbr, &chars[abbrinds[i]]) == 0 &&
1880 ttisstd == ttisstds[i] &&
1881 ttisgmt == ttisgmts[i])
1882 return (i);
1883 }
1884 /*
1885 * There isn't one; add a new one, unless there are already too
1886 * many.
1887 */
1888 if (typecnt >= TZ_MAX_TYPES) {
1889 error(gettext("too many local time types"));
1890 exit(EXIT_FAILURE);
1891 }
1892 if (!(-1L - 2147483647L <= gmtoff && gmtoff <= 2147483647L)) {
1893 error(gettext("UTC offset out of range"));
1894 exit(EXIT_FAILURE);
1895 }
1896 gmtoffs[i] = gmtoff;
1897 isdsts[i] = isdst;
1898 ttisstds[i] = ttisstd;
1899 ttisgmts[i] = ttisgmt;
1900
1901 for (j = 0; j < charcnt; ++j)
1902 if (strcmp(&chars[j], abbr) == 0)
1903 break;
1904 if (j == charcnt)
1905 newabbr(abbr);
1906 abbrinds[i] = j;
1907 ++typecnt;
1908 return (i);
1909 }
1910
1911 #ifdef LEAPSECOND_SUPPORT
1912 static void
1913 leapadd(t, positive, rolling, count)
1914 const zic_t t;
1915 const int positive;
1916 const int rolling;
1917 int count;
1918 {
1919 register int i, j;
1920
1921 if (leapcnt + (positive ? count : 1) > TZ_MAX_LEAPS) {
1922 error(gettext("too many leap seconds"));
1923 exit(EXIT_FAILURE);
1924 }
1925 for (i = 0; i < leapcnt; ++i)
1926 if (t <= trans[i]) {
1927 if (t == trans[i]) {
1928 error(gettext("repeated leap second moment"));
1929 exit(EXIT_FAILURE);
1930 }
1931 break;
1932 }
1933 do {
1934 for (j = leapcnt; j > i; --j) {
1935 trans[j] = trans[j - 1];
1936 corr[j] = corr[j - 1];
1937 roll[j] = roll[j - 1];
1938 }
1939 trans[i] = t;
1940 corr[i] = positive ? 1L : eitol(-count);
1941 roll[i] = rolling;
1942 ++leapcnt;
1943 } while (positive && --count != 0);
1944 }
1945 #endif /* LEAPSECOND_SUPPORT */
1946
1947 #ifdef LEAPSECOND_SUPPORT
1948 static void
1949 adjleap(void)
1950 {
1951 register int i;
1952 register long last = 0;
1953
1954 /*
1955 * propagate leap seconds forward
1956 */
1957 for (i = 0; i < leapcnt; ++i) {
1958 trans[i] = tadd(trans[i], last);
1959 last = corr[i] += last;
1960 }
1961 }
1962 #endif /* LEAPSECOND_SUPPORT */
1963
1964 static int
1965 yearistype(year, type)
1966 const int year;
1967 const char * const type;
1968 {
1969 static char *buf;
1970 int result;
1971
1972 if (type == NULL || *type == '\0')
1973 return (TRUE);
1974 #if defined(sun)
1975 if (strcmp(type, "uspres") == 0)
1976 return ((year % 4) == 0);
1977 if (strcmp(type, "nonpres") == 0)
1978 return ((year % 4) != 0);
1979 if (strcmp(type, "even") == 0)
1980 return ((year % 2) == 0);
1981 if (strcmp(type, "odd") == 0)
1982 return ((year % 2) != 0);
1983 #endif /* defined(sun) */
1984
1985 buf = erealloc(buf, (int)(132 + strlen(yitcommand) + strlen(type)));
1986 (void) sprintf(buf, "%s %d %s", yitcommand, year, type);
1987 result = system(buf);
1988 if (WIFEXITED(result)) {
1989 switch (WEXITSTATUS(result)) {
1990 case 0:
1991 return (TRUE);
1992 case 1:
1993 return (FALSE);
1994 }
1995 }
1996 error(gettext("Wild result from command execution"));
1997 (void) fprintf(stderr, gettext("%s: command was '%s', result was %d\n"),
1998 progname, buf, result);
1999 for (;;)
2000 exit(EXIT_FAILURE);
2001 }
2002
2003 static int
2004 lowerit(a)
2005 int a;
2006 {
2007 a = (unsigned char) a;
2008 return ((isascii(a) && isupper(a)) ? tolower(a) : a);
2009 }
2010
2011 static int
2012 ciequal(ap, bp) /* case-insensitive equality */
2013 register const char *ap;
2014 register const char *bp;
2015 {
2016 while (lowerit(*ap) == lowerit(*bp++))
2017 if (*ap++ == '\0')
2018 return (TRUE);
2019 return (FALSE);
2020 }
2021
2022 static int
2023 itsabbr(abbr, word)
2024 register const char *abbr;
2025 register const char *word;
2026 {
2027 if (lowerit(*abbr) != lowerit(*word))
2028 return (FALSE);
2029 ++word;
2030 while (*++abbr != '\0')
2031 do {
2032 if (*word == '\0')
2033 return (FALSE);
2034 } while (lowerit(*word++) != lowerit(*abbr));
2035 return (TRUE);
2036 }
2037
2038 static const struct lookup *
2039 byword(word, table)
2040 register const char * const word;
2041 register const struct lookup * const table;
2042 {
2043 register const struct lookup *foundlp;
2044 register const struct lookup *lp;
2045
2046 if (word == NULL || table == NULL)
2047 return (NULL);
2048 /*
2049 * Look for exact match.
2050 */
2051 for (lp = table; lp->l_word != NULL; ++lp)
2052 if (ciequal(word, lp->l_word))
2053 return (lp);
2054 /*
2055 * Look for inexact match.
2056 */
2057 foundlp = NULL;
2058 for (lp = table; lp->l_word != NULL; ++lp)
2059 if (itsabbr(word, lp->l_word)) {
2060 if (foundlp == NULL)
2061 foundlp = lp;
2062 else return (NULL); /* multiple inexact matches */
2063 }
2064 return (foundlp);
2065 }
2066
2067 static char **
2068 getfields(cp)
2069 register char *cp;
2070 {
2071 register char *dp;
2072 register char **array;
2073 register int nsubs;
2074
2075 if (cp == NULL)
2076 return (NULL);
2077 array = (char **)(void *)
2078 emalloc((int)((strlen(cp) + 1) * sizeof (*array)));
2079 nsubs = 0;
2080 for (;;) {
2081 while (isascii(*cp) && isspace((unsigned char) *cp))
2082 ++cp;
2083 if (*cp == '\0' || *cp == '#')
2084 break;
2085 array[nsubs++] = dp = cp;
2086 do {
2087 if ((*dp = *cp++) != '"')
2088 ++dp;
2089 else while ((*dp = *cp++) != '"')
2090 if (*dp != '\0')
2091 ++dp;
2092 else {
2093 error(gettext(
2094 "Odd number of quotation marks"));
2095 exit(1);
2096 }
2097 } while (*cp != '\0' && *cp != '#' &&
2098 (!isascii(*cp) || !isspace((unsigned char) *cp)));
2099 if (isascii(*cp) && isspace((unsigned char) *cp))
2100 ++cp;
2101 *dp = '\0';
2102 }
2103 array[nsubs] = NULL;
2104 return (array);
2105 }
2106
2107 static long
2108 oadd(t1, t2)
2109 const long t1;
2110 const long t2;
2111 {
2112 register long t;
2113
2114 t = t1 + t2;
2115 if ((t2 > 0 && t <= t1) || (t2 < 0 && t >= t1)) {
2116 error(gettext("time overflow"));
2117 exit(EXIT_FAILURE);
2118 }
2119 return (t);
2120 }
2121
2122 static zic_t
2123 tadd(t1, t2)
2124 const zic_t t1;
2125 const long t2;
2126 {
2127 register zic_t t;
2128
2129 if (t1 == max_time && t2 > 0)
2130 return (max_time);
2131 if (t1 == min_time && t2 < 0)
2132 return (min_time);
2133 t = t1 + t2;
2134 if ((t2 > 0 && t <= t1) || (t2 < 0 && t >= t1)) {
2135 error(gettext("time overflow"));
2136 exit(EXIT_FAILURE);
2137 }
2138 return (t);
2139 }
2140
2141 /*
2142 * Given a rule, and a year, compute the date - in seconds since January 1,
2143 * 1970, 00:00 LOCAL time - in that year that the rule refers to.
2144 */
2145
2146 static zic_t
2147 rpytime(rp, wantedy)
2148 register const struct rule * const rp;
2149 register const int wantedy;
2150 {
2151 register int y, m, i;
2152 register long dayoff; /* with a nod to Margaret O. */
2153 register zic_t t;
2154
2155 if (wantedy == INT_MIN)
2156 return (min_time);
2157 if (wantedy == INT_MAX)
2158 return (max_time);
2159 dayoff = 0;
2160 m = TM_JANUARY;
2161 y = EPOCH_YEAR;
2162 while (wantedy != y) {
2163 if (wantedy > y) {
2164 i = len_years[isleap(y)];
2165 ++y;
2166 } else {
2167 --y;
2168 i = -len_years[isleap(y)];
2169 }
2170 dayoff = oadd(dayoff, eitol(i));
2171 }
2172 while (m != rp->r_month) {
2173 i = len_months[isleap(y)][m];
2174 dayoff = oadd(dayoff, eitol(i));
2175 ++m;
2176 }
2177 i = rp->r_dayofmonth;
2178 if (m == TM_FEBRUARY && i == 29 && !isleap(y)) {
2179 if (rp->r_dycode == DC_DOWLEQ)
2180 --i;
2181 else {
2182 error(gettext("use of 2/29 in non leap-year"));
2183 exit(EXIT_FAILURE);
2184 }
2185 }
2186 --i;
2187 dayoff = oadd(dayoff, eitol(i));
2188 if (rp->r_dycode == DC_DOWGEQ || rp->r_dycode == DC_DOWLEQ) {
2189 register long wday;
2190
2191 #define LDAYSPERWEEK ((long)DAYSPERWEEK)
2192 wday = eitol(EPOCH_WDAY);
2193 /*
2194 * Don't trust mod of negative numbers.
2195 */
2196 if (dayoff >= 0)
2197 wday = (wday + dayoff) % LDAYSPERWEEK;
2198 else {
2199 wday -= ((-dayoff) % LDAYSPERWEEK);
2200 if (wday < 0)
2201 wday += LDAYSPERWEEK;
2202 }
2203 while (wday != eitol(rp->r_wday))
2204 if (rp->r_dycode == DC_DOWGEQ) {
2205 dayoff = oadd(dayoff, (long)1);
2206 if (++wday >= LDAYSPERWEEK)
2207 wday = 0;
2208 ++i;
2209 } else {
2210 dayoff = oadd(dayoff, (long)-1);
2211 if (--wday < 0)
2212 wday = LDAYSPERWEEK - 1;
2213 --i;
2214 }
2215 if (i < 0 || i >= len_months[isleap(y)][m]) {
2216 if (noise)
2217 warning(gettext("rule goes past start/end of "
2218 "month--will not work with pre-2004 "
2219 "versions of zic"));
2220 }
2221 }
2222 if (dayoff < 0 && !TYPE_SIGNED(zic_t))
2223 return (min_time);
2224 if (dayoff < min_time / SECSPERDAY)
2225 return (min_time);
2226 if (dayoff > max_time / SECSPERDAY)
2227 return (max_time);
2228 t = (zic_t)dayoff * SECSPERDAY;
2229 return (tadd(t, rp->r_tod));
2230 }
2231
2232 static void
2233 newabbr(const char * const string)
2234 {
2235 register int i;
2236
2237 if (strcmp(string, GRANDPARENTED) != 0) {
2238 register const char *cp;
2239 register char *wp;
2240
2241 cp = string;
2242 wp = NULL;
2243 while (isalpha(*cp) || ('0' <= *cp && *cp <= '9') ||
2244 *cp == '-' || *cp == '+') {
2245 ++cp;
2246 }
2247 if (noise && cp - string < 3)
2248 wp = gettext(("time zone abbreviation has less than 3 "
2249 "alphabetics"));
2250 if (cp - string > ZIC_MAX_ABBR_LEN_WO_WARN)
2251 wp = gettext(("time zone abbreviation has too many "
2252 "characters"));
2253 if (wp == NULL && (*cp == '+' || *cp == '-')) {
2254 ++cp;
2255 if (isascii(*cp) && isdigit(*cp))
2256 if (*cp++ == '1' && *cp >= '0' && *cp <= '4')
2257 ++cp;
2258 }
2259 if (*cp != '\0')
2260 wp = gettext("time zone abbreviation differs from "
2261 "POSIX standard");
2262 if (wp != NULL) {
2263 wp = ecpyalloc(wp);
2264 wp = ecatalloc(wp, " (");
2265 wp = ecatalloc(wp, string);
2266 wp = ecatalloc(wp, ")");
2267 warning(wp);
2268 ifree(wp);
2269 }
2270 }
2271 i = strlen(string) + 1;
2272 if (charcnt + i > TZ_MAX_CHARS) {
2273 error(gettext("too many, or too long, time zone "
2274 "abbreviations"));
2275 exit(EXIT_FAILURE);
2276 }
2277 (void) strcpy(&chars[charcnt], string);
2278 charcnt += eitol(i);
2279 }
2280
2281 static int
2282 mkdirs(argname)
2283 char *argname;
2284 {
2285 register char *name;
2286 register char *cp;
2287
2288 if (argname == NULL || *argname == '\0')
2289 return (0);
2290 cp = name = ecpyalloc(argname);
2291 while ((cp = strchr(cp + 1, '/')) != 0) {
2292 *cp = '\0';
2293 if (!itsdir(name)) {
2294 /*
2295 * It doesn't seem to exist, so we try to create it.
2296 * Creation may fail because of the directory being
2297 * created by some other multiprocessor, so we get
2298 * to do extra checking.
2299 */
2300 if (mkdir(name, MKDIR_UMASK) != 0) {
2301 const char *e = strerror(errno);
2302
2303 if (errno != EEXIST || !itsdir(name)) {
2304 (void) fprintf(stderr, gettext(
2305 "%s: Can't create directory %s: %s\n"),
2306 progname, name, e);
2307 ifree(name);
2308 return (-1);
2309 }
2310 }
2311 }
2312 *cp = '/';
2313 }
2314 ifree(name);
2315 return (0);
2316 }
2317
2318 static long
2319 eitol(i)
2320 const int i;
2321 {
2322 long l;
2323
2324 l = i;
2325 if ((i < 0 && l >= 0) || (i == 0 && l != 0) || (i > 0 && l <= 0)) {
2326 (void) fprintf(stderr,
2327 gettext("%s: %d did not sign extend correctly\n"),
2328 progname, i);
2329 exit(EXIT_FAILURE);
2330 }
2331 return (l);
2332 }
2333
2334 /*
2335 * UNIX was a registered trademark of The Open Group in 2003.
2336 */