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