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add opendir alias
[minix.git] / lib / libc / time / zic.c
blobbb4eaa01891a273ac14e9eb19e2a4c6e8c1802cc
1 /* $NetBSD: zic.c,v 1.30 2012/08/09 12:38:26 christos Exp $ */
2 /*
3 ** This file is in the public domain, so clarified as of
4 ** 2006-07-17 by Arthur David Olson.
5 */
6
7 #if HAVE_NBTOOL_CONFIG_H
8 #include "nbtool_config.h"
9 #endif
10
11 #include <sys/cdefs.h>
12 #ifndef lint
13 __RCSID("$NetBSD: zic.c,v 1.30 2012/08/09 12:38:26 christos Exp $");
14 #endif /* !defined lint */
15
16 #include "version.h"
17 #include "private.h"
18 #include "locale.h"
19 #include "tzfile.h"
20
21 #define ZIC_VERSION '2'
22
23 typedef int_fast64_t zic_t;
24
25 #ifndef ZIC_MAX_ABBR_LEN_WO_WARN
26 #define ZIC_MAX_ABBR_LEN_WO_WARN 6
27 #endif /* !defined ZIC_MAX_ABBR_LEN_WO_WARN */
28
29 #if HAVE_SYS_STAT_H
30 #include "sys/stat.h"
31 #endif
32 #ifdef S_IRUSR
33 #define MKDIR_UMASK (S_IRUSR|S_IWUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH)
34 #else
35 #define MKDIR_UMASK 0755
36 #endif
37
38 #include "unistd.h"
39
40 /*
41 ** On some ancient hosts, predicates like `isspace(C)' are defined
42 ** only if isascii(C) || C == EOF. Modern hosts obey the C Standard,
43 ** which says they are defined only if C == ((unsigned char) C) || C == EOF.
44 ** Neither the C Standard nor Posix require that `isascii' exist.
45 ** For portability, we check both ancient and modern requirements.
46 ** If isascii is not defined, the isascii check succeeds trivially.
47 */
48 #include "ctype.h"
49 #ifndef isascii
50 #define isascii(x) 1
51 #endif
52
53 #define OFFSET_STRLEN_MAXIMUM (7 + INT_STRLEN_MAXIMUM(long))
54 #define RULE_STRLEN_MAXIMUM 8 /* "Mdd.dd.d" */
55
56 #define end(cp) (strchr((cp), '\0'))
57
58 struct rule {
59 const char * r_filename;
60 int r_linenum;
61 const char * r_name;
62
63 int r_loyear; /* for example, 1986 */
64 int r_hiyear; /* for example, 1986 */
65 const char * r_yrtype;
66 int r_lowasnum;
67 int r_hiwasnum;
68
69 int r_month; /* 0..11 */
70
71 int r_dycode; /* see below */
72 int r_dayofmonth;
73 int r_wday;
74
75 long r_tod; /* time from midnight */
76 int r_todisstd; /* above is standard time if TRUE */
77 /* or wall clock time if FALSE */
78 int r_todisgmt; /* above is GMT if TRUE */
79 /* or local time if FALSE */
80 long r_stdoff; /* offset from standard time */
81 const char * r_abbrvar; /* variable part of abbreviation */
82
83 int r_todo; /* a rule to do (used in outzone) */
84 zic_t r_temp; /* used in outzone */
85 };
86
87 /*
88 ** r_dycode r_dayofmonth r_wday
89 */
90
91 #define DC_DOM 0 /* 1..31 */ /* unused */
92 #define DC_DOWGEQ 1 /* 1..31 */ /* 0..6 (Sun..Sat) */
93 #define DC_DOWLEQ 2 /* 1..31 */ /* 0..6 (Sun..Sat) */
94
95 struct zone {
96 const char * z_filename;
97 int z_linenum;
98
99 const char * z_name;
100 long z_gmtoff;
101 const char * z_rule;
102 const char * z_format;
103
104 long z_stdoff;
105
106 struct rule * z_rules;
107 int z_nrules;
108
109 struct rule z_untilrule;
110 zic_t z_untiltime;
111 };
112
113 extern int getopt(int argc, char * const argv[],
114 const char * options);
115 extern int link(const char * fromname, const char * toname);
116 extern char * optarg;
117 extern int optind;
118
119 static void addtt(zic_t starttime, int type);
120 static int addtype(long gmtoff, const char * abbr, int isdst,
121 int ttisstd, int ttisgmt);
122 static void leapadd(zic_t t, int positive, int rolling, int count);
123 static void adjleap(void);
124 static void associate(void);
125 static int ciequal(const char * ap, const char * bp);
126 static void convert(long val, char * buf);
127 static void convert64(zic_t val, char * buf);
128 static void dolink(const char * fromfield, const char * tofield);
129 static void doabbr(char * abbr, const int, const char * format,
130 const char * letters, int isdst, int doquotes);
131 static void eat(const char * name, int num);
132 static void eats(const char * name, int num,
133 const char * rname, int rnum);
134 static long eitol(int i);
135 static void error(const char * message);
136 static char ** getfields(char * buf);
137 static long gethms(const char * string, const char * errstrng,
138 int signable);
139 static void infile(const char * filename);
140 static void inleap(char ** fields, int nfields);
141 static void inlink(char ** fields, int nfields);
142 static void inrule(char ** fields, int nfields);
143 static int inzcont(char ** fields, int nfields);
144 static int inzone(char ** fields, int nfields);
145 static int inzsub(char ** fields, int nfields, int iscont);
146 static int is32(zic_t x);
147 static int itsabbr(const char * abbr, const char * word);
148 static int itsdir(const char * name);
149 static int lowerit(int c);
150 int main(int, char **);
151 static char * memcheck(char * tocheck);
152 static int mkdirs(char * filename);
153 static void newabbr(const char * abbr);
154 static long oadd(long t1, long t2);
155 static void outzone(const struct zone * zp, int ntzones);
156 static void puttzcode(long code, FILE * fp);
157 static void puttzcode64(zic_t code, FILE * fp);
158 static int rcomp(const void * leftp, const void * rightp);
159 static zic_t rpytime(const struct rule * rp, int wantedy);
160 static void rulesub(struct rule * rp,
161 const char * loyearp, const char * hiyearp,
162 const char * typep, const char * monthp,
163 const char * dayp, const char * timep);
164 static int stringoffset(char * result, long offset);
165 static int stringrule(char * result, const struct rule * rp,
166 long dstoff, long gmtoff);
167 static void stringzone(char * result, const int,
168 const struct zone * zp, int ntzones);
169 static void setboundaries(void);
170 static zic_t tadd(zic_t t1, long t2);
171 static void usage(FILE *stream, int status);
172 static void warning(const char * const);
173 static void writezone(const char * name, const char * string);
174 static int yearistype(int year, const char * type);
175 static int atcomp(const void *avp, const void *bvp);
176 static void updateminmax(int x);
177
178 static int charcnt;
179 static int errors;
180 static const char * filename;
181 static int leapcnt;
182 static int leapseen;
183 static int leapminyear;
184 static int leapmaxyear;
185 static int linenum;
186 static int max_abbrvar_len;
187 static int max_format_len;
188 static zic_t max_time;
189 static int max_year;
190 static zic_t min_time;
191 static int min_year;
192 static int noise;
193 static const char * rfilename;
194 static int rlinenum;
195 static const char * progname;
196 static int timecnt;
197 static int typecnt;
198
199 /*
200 ** Line codes.
201 */
202
203 #define LC_RULE 0
204 #define LC_ZONE 1
205 #define LC_LINK 2
206 #define LC_LEAP 3
207
208 /*
209 ** Which fields are which on a Zone line.
210 */
211
212 #define ZF_NAME 1
213 #define ZF_GMTOFF 2
214 #define ZF_RULE 3
215 #define ZF_FORMAT 4
216 #define ZF_TILYEAR 5
217 #define ZF_TILMONTH 6
218 #define ZF_TILDAY 7
219 #define ZF_TILTIME 8
220 #define ZONE_MINFIELDS 5
221 #define ZONE_MAXFIELDS 9
222
223 /*
224 ** Which fields are which on a Zone continuation line.
225 */
226
227 #define ZFC_GMTOFF 0
228 #define ZFC_RULE 1
229 #define ZFC_FORMAT 2
230 #define ZFC_TILYEAR 3
231 #define ZFC_TILMONTH 4
232 #define ZFC_TILDAY 5
233 #define ZFC_TILTIME 6
234 #define ZONEC_MINFIELDS 3
235 #define ZONEC_MAXFIELDS 7
236
237 /*
238 ** Which files are which on a Rule line.
239 */
240
241 #define RF_NAME 1
242 #define RF_LOYEAR 2
243 #define RF_HIYEAR 3
244 #define RF_COMMAND 4
245 #define RF_MONTH 5
246 #define RF_DAY 6
247 #define RF_TOD 7
248 #define RF_STDOFF 8
249 #define RF_ABBRVAR 9
250 #define RULE_FIELDS 10
251
252 /*
253 ** Which fields are which on a Link line.
254 */
255
256 #define LF_FROM 1
257 #define LF_TO 2
258 #define LINK_FIELDS 3
259
260 /*
261 ** Which fields are which on a Leap line.
262 */
263
264 #define LP_YEAR 1
265 #define LP_MONTH 2
266 #define LP_DAY 3
267 #define LP_TIME 4
268 #define LP_CORR 5
269 #define LP_ROLL 6
270 #define LEAP_FIELDS 7
271
272 /*
273 ** Year synonyms.
274 */
275
276 #define YR_MINIMUM 0
277 #define YR_MAXIMUM 1
278 #define YR_ONLY 2
279
280 static struct rule * rules;
281 static int nrules; /* number of rules */
282
283 static struct zone * zones;
284 static int nzones; /* number of zones */
285
286 struct link {
287 const char * l_filename;
288 int l_linenum;
289 const char * l_from;
290 const char * l_to;
291 };
292
293 static struct link * links;
294 static int nlinks;
295
296 struct lookup {
297 const char * l_word;
298 const int l_value;
299 };
300
301 static struct lookup const * byword(const char * string,
302 const struct lookup * lp);
303
304 static struct lookup const line_codes[] = {
305 { "Rule", LC_RULE },
306 { "Zone", LC_ZONE },
307 { "Link", LC_LINK },
308 { "Leap", LC_LEAP },
309 { NULL, 0}
310 };
311
312 static struct lookup const mon_names[] = {
313 { "January", TM_JANUARY },
314 { "February", TM_FEBRUARY },
315 { "March", TM_MARCH },
316 { "April", TM_APRIL },
317 { "May", TM_MAY },
318 { "June", TM_JUNE },
319 { "July", TM_JULY },
320 { "August", TM_AUGUST },
321 { "September", TM_SEPTEMBER },
322 { "October", TM_OCTOBER },
323 { "November", TM_NOVEMBER },
324 { "December", TM_DECEMBER },
325 { NULL, 0 }
326 };
327
328 static struct lookup const wday_names[] = {
329 { "Sunday", TM_SUNDAY },
330 { "Monday", TM_MONDAY },
331 { "Tuesday", TM_TUESDAY },
332 { "Wednesday", TM_WEDNESDAY },
333 { "Thursday", TM_THURSDAY },
334 { "Friday", TM_FRIDAY },
335 { "Saturday", TM_SATURDAY },
336 { NULL, 0 }
337 };
338
339 static struct lookup const lasts[] = {
340 { "last-Sunday", TM_SUNDAY },
341 { "last-Monday", TM_MONDAY },
342 { "last-Tuesday", TM_TUESDAY },
343 { "last-Wednesday", TM_WEDNESDAY },
344 { "last-Thursday", TM_THURSDAY },
345 { "last-Friday", TM_FRIDAY },
346 { "last-Saturday", TM_SATURDAY },
347 { NULL, 0 }
348 };
349
350 static struct lookup const begin_years[] = {
351 { "minimum", YR_MINIMUM },
352 { "maximum", YR_MAXIMUM },
353 { NULL, 0 }
354 };
355
356 static struct lookup const end_years[] = {
357 { "minimum", YR_MINIMUM },
358 { "maximum", YR_MAXIMUM },
359 { "only", YR_ONLY },
360 { NULL, 0 }
361 };
362
363 static struct lookup const leap_types[] = {
364 { "Rolling", TRUE },
365 { "Stationary", FALSE },
366 { NULL, 0 }
367 };
368
369 static const int len_months[2][MONSPERYEAR] = {
370 { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 },
371 { 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }
372 };
373
374 static const int len_years[2] = {
375 DAYSPERNYEAR, DAYSPERLYEAR
376 };
377
378 static struct attype {
379 zic_t at;
380 unsigned char type;
381 } attypes[TZ_MAX_TIMES];
382 static long gmtoffs[TZ_MAX_TYPES];
383 static char isdsts[TZ_MAX_TYPES];
384 static unsigned char abbrinds[TZ_MAX_TYPES];
385 static char ttisstds[TZ_MAX_TYPES];
386 static char ttisgmts[TZ_MAX_TYPES];
387 static char chars[TZ_MAX_CHARS];
388 static zic_t trans[TZ_MAX_LEAPS];
389 static long corr[TZ_MAX_LEAPS];
390 static char roll[TZ_MAX_LEAPS];
391
392 /*
393 ** Memory allocation.
394 */
395
396 static char *
397 memcheck(ptr)
398 char * const ptr;
399 {
400 if (ptr == NULL) {
401 const char *e = strerror(errno);
402
403 (void) fprintf(stderr, _("%s: Memory exhausted: %s\n"),
404 progname, e);
405 exit(EXIT_FAILURE);
406 }
407 return ptr;
408 }
409
410 #define emalloc(size) memcheck(imalloc(size))
411 #define erealloc(ptr, size) memcheck(irealloc((ptr), (size)))
412 #define ecpyalloc(ptr) memcheck(icpyalloc(ptr))
413 #define ecatalloc(oldp, newp) memcheck(icatalloc((oldp), (newp)))
414
415 /*
416 ** Error handling.
417 */
418
419 static void
420 eats(name, num, rname, rnum)
421 const char * const name;
422 const int num;
423 const char * const rname;
424 const int rnum;
425 {
426 filename = name;
427 linenum = num;
428 rfilename = rname;
429 rlinenum = rnum;
430 }
431
432 static void
433 eat(name, num)
434 const char * const name;
435 const int num;
436 {
437 eats(name, num, (char *) NULL, -1);
438 }
439
440 static void
441 error(string)
442 const char * const string;
443 {
444 /*
445 ** Match the format of "cc" to allow sh users to
446 ** zic ... 2>&1 | error -t "*" -v
447 ** on BSD systems.
448 */
449 (void) fprintf(stderr, _("\"%s\", line %d: %s"),
450 filename, linenum, string);
451 if (rfilename != NULL)
452 (void) fprintf(stderr, _(" (rule from \"%s\", line %d)"),
453 rfilename, rlinenum);
454 (void) fprintf(stderr, "\n");
455 ++errors;
456 }
457
458 static void
459 warning(string)
460 const char * const string;
461 {
462 char * cp;
463
464 cp = ecpyalloc(_("warning: "));
465 cp = ecatalloc(cp, string);
466 error(cp);
467 ifree(cp);
468 --errors;
469 }
470
471 static void
472 usage(FILE *stream, int status)
473 {
474 (void) fprintf(stream, _("%s: usage is %s \
475 [ --version ] [ --help ] [ -v ] [ -l localtime ] [ -p posixrules ] \\\n\
476 \t[ -d directory ] [ -L leapseconds ] [ -y yearistype ] [ filename ... ]\n\
477 \n\
478 Report bugs to tz@elsie.nci.nih.gov.\n"),
479 progname, progname);
480 exit(status);
481 }
482
483 static const char * psxrules;
484 static const char * lcltime;
485 static const char * directory;
486 static const char * leapsec;
487 static const char * yitcommand;
488
489 int
490 main(argc, argv)
491 int argc;
492 char * argv[];
493 {
494 register int i;
495 register int j;
496 register int c;
497
498 #ifdef _POSIX_VERSION
499 (void) umask(umask(S_IWGRP | S_IWOTH) | (S_IWGRP | S_IWOTH));
500 #endif /* defined _POSIX_VERSION */
501 #if HAVE_GETTEXT - 0
502 (void) setlocale(LC_MESSAGES, "");
503 #ifdef TZ_DOMAINDIR
504 (void) bindtextdomain(TZ_DOMAIN, TZ_DOMAINDIR);
505 #endif /* defined TEXTDOMAINDIR */
506 (void) textdomain(TZ_DOMAIN);
507 #endif /* HAVE_GETTEXT */
508 progname = argv[0];
509 if (TYPE_BIT(zic_t) < 64) {
510 (void) fprintf(stderr, "%s: %s\n", progname,
511 _("wild compilation-time specification of zic_t"));
512 exit(EXIT_FAILURE);
513 }
514 for (i = 1; i < argc; ++i)
515 if (strcmp(argv[i], "--version") == 0) {
516 (void) printf("%s\n", TZVERSION);
517 exit(EXIT_SUCCESS);
518 } else if (strcmp(argv[i], "--help") == 0) {
519 usage(stdout, EXIT_SUCCESS);
520 }
521 while ((c = getopt(argc, argv, "d:l:p:L:vsy:")) != EOF && c != -1)
522 switch (c) {
523 default:
524 usage(stderr, EXIT_FAILURE);
525 case 'd':
526 if (directory == NULL)
527 directory = optarg;
528 else {
529 (void) fprintf(stderr,
530 _("%s: More than one -d option specified\n"),
531 progname);
532 exit(EXIT_FAILURE);
533 }
534 break;
535 case 'l':
536 if (lcltime == NULL)
537 lcltime = optarg;
538 else {
539 (void) fprintf(stderr,
540 _("%s: More than one -l option specified\n"),
541 progname);
542 exit(EXIT_FAILURE);
543 }
544 break;
545 case 'p':
546 if (psxrules == NULL)
547 psxrules = optarg;
548 else {
549 (void) fprintf(stderr,
550 _("%s: More than one -p option specified\n"),
551 progname);
552 exit(EXIT_FAILURE);
553 }
554 break;
555 case 'y':
556 if (yitcommand == NULL)
557 yitcommand = optarg;
558 else {
559 (void) fprintf(stderr,
560 _("%s: More than one -y option specified\n"),
561 progname);
562 exit(EXIT_FAILURE);
563 }
564 break;
565 case 'L':
566 if (leapsec == NULL)
567 leapsec = optarg;
568 else {
569 (void) fprintf(stderr,
570 _("%s: More than one -L option specified\n"),
571 progname);
572 exit(EXIT_FAILURE);
573 }
574 break;
575 case 'v':
576 noise = TRUE;
577 break;
578 case 's':
579 (void) printf("%s: -s ignored\n", progname);
580 break;
581 }
582 if (optind == argc - 1 && strcmp(argv[optind], "=") == 0)
583 usage(stderr, EXIT_FAILURE); /* usage message by request */
584 if (directory == NULL)
585 directory = TZDIR;
586 if (yitcommand == NULL)
587 yitcommand = "yearistype";
588
589 setboundaries();
590
591 if (optind < argc && leapsec != NULL) {
592 infile(leapsec);
593 adjleap();
594 }
595
596 for (i = optind; i < argc; ++i)
597 infile(argv[i]);
598 if (errors)
599 exit(EXIT_FAILURE);
600 associate();
601 for (i = 0; i < nzones; i = j) {
602 /*
603 ** Find the next non-continuation zone entry.
604 */
605 for (j = i + 1; j < nzones && zones[j].z_name == NULL; ++j)
606 continue;
607 outzone(&zones[i], j - i);
608 }
609 /*
610 ** Make links.
611 */
612 for (i = 0; i < nlinks; ++i) {
613 eat(links[i].l_filename, links[i].l_linenum);
614 dolink(links[i].l_from, links[i].l_to);
615 if (noise)
616 for (j = 0; j < nlinks; ++j)
617 if (strcmp(links[i].l_to,
618 links[j].l_from) == 0)
619 warning(_("link to link"));
620 }
621 if (lcltime != NULL) {
622 eat("command line", 1);
623 dolink(lcltime, TZDEFAULT);
624 }
625 if (psxrules != NULL) {
626 eat("command line", 1);
627 dolink(psxrules, TZDEFRULES);
628 }
629 return (errors == 0) ? EXIT_SUCCESS : EXIT_FAILURE;
630 }
631
632 static void
633 dolink(fromfield, tofield)
634 const char * const fromfield;
635 const char * const tofield;
636 {
637 register char * fromname;
638 register char * toname;
639
640 if (fromfield[0] == '/')
641 fromname = ecpyalloc(fromfield);
642 else {
643 fromname = ecpyalloc(directory);
644 fromname = ecatalloc(fromname, "/");
645 fromname = ecatalloc(fromname, fromfield);
646 }
647 if (tofield[0] == '/')
648 toname = ecpyalloc(tofield);
649 else {
650 toname = ecpyalloc(directory);
651 toname = ecatalloc(toname, "/");
652 toname = ecatalloc(toname, tofield);
653 }
654 /*
655 ** We get to be careful here since
656 ** there's a fair chance of root running us.
657 */
658 if (!itsdir(toname))
659 (void) remove(toname);
660 if (link(fromname, toname) != 0) {
661 int result;
662
663 if (mkdirs(toname) != 0)
664 exit(EXIT_FAILURE);
665
666 result = link(fromname, toname);
667 #if HAVE_SYMLINK
668 if (result != 0 &&
669 access(fromname, F_OK) == 0 &&
670 !itsdir(fromname)) {
671 const char *s = tofield;
672 register char * symlinkcontents = NULL;
673
674 while ((s = strchr(s+1, '/')) != NULL)
675 symlinkcontents =
676 ecatalloc(symlinkcontents,
677 "../");
678 symlinkcontents =
679 ecatalloc(symlinkcontents,
680 fromname);
681 result = symlink(symlinkcontents,
682 toname);
683 if (result == 0)
684 warning(_("hard link failed, symbolic link used"));
685 ifree(symlinkcontents);
686 }
687 #endif /* HAVE_SYMLINK */
688 if (result != 0) {
689 const char *e = strerror(errno);
690
691 (void) fprintf(stderr,
692 _("%s: Can't link from %s to %s: %s\n"),
693 progname, fromname, toname, e);
694 exit(EXIT_FAILURE);
695 }
696 }
697 ifree(fromname);
698 ifree(toname);
699 }
700
701 #define TIME_T_BITS_IN_FILE 64
702
703 static void
704 setboundaries(void)
705 {
706 register int i;
707
708 min_time = -1;
709 for (i = 0; i < TIME_T_BITS_IN_FILE - 1; ++i)
710 min_time *= 2;
711 max_time = -(min_time + 1);
712 }
713
714 static int
715 itsdir(name)
716 const char * const name;
717 {
718 register char * myname;
719 register int accres;
720
721 myname = ecpyalloc(name);
722 myname = ecatalloc(myname, "/.");
723 accres = access(myname, F_OK);
724 ifree(myname);
725 return accres == 0;
726 }
727
728 /*
729 ** Associate sets of rules with zones.
730 */
731
732 /*
733 ** Sort by rule name.
734 */
735
736 static int
737 rcomp(cp1, cp2)
738 const void * cp1;
739 const void * cp2;
740 {
741 return strcmp(((const struct rule *) cp1)->r_name,
742 ((const struct rule *) cp2)->r_name);
743 }
744
745 static void
746 associate(void)
747 {
748 register struct zone * zp;
749 register struct rule * rp;
750 register int base, out;
751 register int i, j;
752
753 if (nrules != 0) {
754 (void) qsort((void *) rules, (size_t) nrules,
755 (size_t) sizeof *rules, rcomp);
756 for (i = 0; i < nrules - 1; ++i) {
757 if (strcmp(rules[i].r_name,
758 rules[i + 1].r_name) != 0)
759 continue;
760 if (strcmp(rules[i].r_filename,
761 rules[i + 1].r_filename) == 0)
762 continue;
763 eat(rules[i].r_filename, rules[i].r_linenum);
764 warning(_("same rule name in multiple files"));
765 eat(rules[i + 1].r_filename, rules[i + 1].r_linenum);
766 warning(_("same rule name in multiple files"));
767 for (j = i + 2; j < nrules; ++j) {
768 if (strcmp(rules[i].r_name,
769 rules[j].r_name) != 0)
770 break;
771 if (strcmp(rules[i].r_filename,
772 rules[j].r_filename) == 0)
773 continue;
774 if (strcmp(rules[i + 1].r_filename,
775 rules[j].r_filename) == 0)
776 continue;
777 break;
778 }
779 i = j - 1;
780 }
781 }
782 for (i = 0; i < nzones; ++i) {
783 zp = &zones[i];
784 zp->z_rules = NULL;
785 zp->z_nrules = 0;
786 }
787 for (base = 0; base < nrules; base = out) {
788 rp = &rules[base];
789 for (out = base + 1; out < nrules; ++out)
790 if (strcmp(rp->r_name, rules[out].r_name) != 0)
791 break;
792 for (i = 0; i < nzones; ++i) {
793 zp = &zones[i];
794 if (strcmp(zp->z_rule, rp->r_name) != 0)
795 continue;
796 zp->z_rules = rp;
797 zp->z_nrules = out - base;
798 }
799 }
800 for (i = 0; i < nzones; ++i) {
801 zp = &zones[i];
802 if (zp->z_nrules == 0) {
803 /*
804 ** Maybe we have a local standard time offset.
805 */
806 eat(zp->z_filename, zp->z_linenum);
807 zp->z_stdoff = gethms(zp->z_rule, _("unruly zone"),
808 TRUE);
809 /*
810 ** Note, though, that if there's no rule,
811 ** a '%s' in the format is a bad thing.
812 */
813 if (strchr(zp->z_format, '%') != 0)
814 error(_("%s in ruleless zone"));
815 }
816 }
817 if (errors)
818 exit(EXIT_FAILURE);
819 }
820
821 static void
822 infile(name)
823 const char * name;
824 {
825 register FILE * fp;
826 register char ** fields;
827 register char * cp;
828 register const struct lookup * lp;
829 register int nfields;
830 register int wantcont;
831 register int num;
832 char buf[BUFSIZ];
833
834 if (strcmp(name, "-") == 0) {
835 name = _("standard input");
836 fp = stdin;
837 } else if ((fp = fopen(name, "r")) == NULL) {
838 const char *e = strerror(errno);
839
840 (void) fprintf(stderr, _("%s: Can't open %s: %s\n"),
841 progname, name, e);
842 exit(EXIT_FAILURE);
843 }
844 wantcont = FALSE;
845 for (num = 1; ; ++num) {
846 eat(name, num);
847 if (fgets(buf, (int) sizeof buf, fp) != buf)
848 break;
849 cp = strchr(buf, '\n');
850 if (cp == NULL) {
851 error(_("line too long"));
852 exit(EXIT_FAILURE);
853 }
854 *cp = '\0';
855 fields = getfields(buf);
856 nfields = 0;
857 while (fields[nfields] != NULL) {
858 static char nada;
859
860 if (strcmp(fields[nfields], "-") == 0)
861 fields[nfields] = &nada;
862 ++nfields;
863 }
864 if (nfields == 0) {
865 /* nothing to do */
866 } else if (wantcont) {
867 wantcont = inzcont(fields, nfields);
868 } else {
869 lp = byword(fields[0], line_codes);
870 if (lp == NULL)
871 error(_("input line of unknown type"));
872 else switch ((int) (lp->l_value)) {
873 case LC_RULE:
874 inrule(fields, nfields);
875 wantcont = FALSE;
876 break;
877 case LC_ZONE:
878 wantcont = inzone(fields, nfields);
879 break;
880 case LC_LINK:
881 inlink(fields, nfields);
882 wantcont = FALSE;
883 break;
884 case LC_LEAP:
885 if (name != leapsec)
886 (void) fprintf(stderr,
887 _("%s: Leap line in non leap seconds file %s\n"),
888 progname, name);
889 else inleap(fields, nfields);
890 wantcont = FALSE;
891 break;
892 default: /* "cannot happen" */
893 (void) fprintf(stderr,
894 _("%s: panic: Invalid l_value %d\n"),
895 progname, lp->l_value);
896 exit(EXIT_FAILURE);
897 }
898 }
899 ifree((char *) fields);
900 }
901 if (ferror(fp)) {
902 (void) fprintf(stderr, _("%s: Error reading %s\n"),
903 progname, filename);
904 exit(EXIT_FAILURE);
905 }
906 if (fp != stdin && fclose(fp)) {
907 const char *e = strerror(errno);
908
909 (void) fprintf(stderr, _("%s: Error closing %s: %s\n"),
910 progname, filename, e);
911 exit(EXIT_FAILURE);
912 }
913 if (wantcont)
914 error(_("expected continuation line not found"));
915 }
916
917 /*
918 ** Convert a string of one of the forms
919 ** h -h hh:mm -hh:mm hh:mm:ss -hh:mm:ss
920 ** into a number of seconds.
921 ** A null string maps to zero.
922 ** Call error with errstring and return zero on errors.
923 */
924
925 static long
926 gethms(string, errstring, signable)
927 const char * string;
928 const char * const errstring;
929 const int signable;
930 {
931 long hh;
932 int mm, ss, sign;
933
934 if (string == NULL || *string == '\0')
935 return 0;
936 if (!signable)
937 sign = 1;
938 else if (*string == '-') {
939 sign = -1;
940 ++string;
941 } else sign = 1;
942 if (sscanf(string, scheck(string, "%ld"), &hh) == 1)
943 mm = ss = 0;
944 else if (sscanf(string, scheck(string, "%ld:%d"), &hh, &mm) == 2)
945 ss = 0;
946 else if (sscanf(string, scheck(string, "%ld:%d:%d"),
947 &hh, &mm, &ss) != 3) {
948 error(errstring);
949 return 0;
950 }
951 if (hh < 0 ||
952 mm < 0 || mm >= MINSPERHOUR ||
953 ss < 0 || ss > SECSPERMIN) {
954 error(errstring);
955 return 0;
956 }
957 if (LONG_MAX / SECSPERHOUR < hh) {
958 error(_("time overflow"));
959 return 0;
960 }
961 if (noise && hh == HOURSPERDAY && mm == 0 && ss == 0)
962 warning(_("24:00 not handled by pre-1998 versions of zic"));
963 if (noise && (hh > HOURSPERDAY ||
964 (hh == HOURSPERDAY && (mm != 0 || ss != 0))))
965 warning(_("values over 24 hours not handled by pre-2007 versions of zic"));
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(_("wrong number of fields on Rule line"));
979 return;
980 }
981 if (*fields[RF_NAME] == '\0') {
982 error(_("nameless rule"));
983 return;
984 }
985 r.r_filename = filename;
986 r.r_linenum = linenum;
987 r.r_stdoff = gethms(fields[RF_STDOFF], _("invalid saved time"), 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 if (max_abbrvar_len < strlen(r.r_abbrvar))
993 max_abbrvar_len = strlen(r.r_abbrvar);
994 rules = (struct rule *) (void *) erealloc((char *) rules,
995 (int) ((nrules + 1) * sizeof *rules));
996 rules[nrules++] = r;
997 }
998
999 static int
1000 inzone(fields, nfields)
1001 register char ** const fields;
1002 const int nfields;
1003 {
1004 register int i;
1005 static char * buf;
1006
1007 if (nfields < ZONE_MINFIELDS || nfields > ZONE_MAXFIELDS) {
1008 error(_("wrong number of fields on Zone line"));
1009 return FALSE;
1010 }
1011 if (strcmp(fields[ZF_NAME], TZDEFAULT) == 0 && lcltime != NULL) {
1012 buf = erealloc(buf, (int) (132 + strlen(TZDEFAULT)));
1013 (void)sprintf(buf, /* XXX: sprintf is safe */
1014 _("\"Zone %s\" line and -l option are mutually exclusive"),
1015 TZDEFAULT);
1016 error(buf);
1017 return FALSE;
1018 }
1019 if (strcmp(fields[ZF_NAME], TZDEFRULES) == 0 && psxrules != NULL) {
1020 buf = erealloc(buf, (int) (132 + strlen(TZDEFRULES)));
1021 (void)sprintf(buf, /* XXX: sprintf is safe */
1022 _("\"Zone %s\" line and -p option are mutually exclusive"),
1023 TZDEFRULES);
1024 error(buf);
1025 return FALSE;
1026 }
1027 for (i = 0; i < nzones; ++i)
1028 if (zones[i].z_name != NULL &&
1029 strcmp(zones[i].z_name, fields[ZF_NAME]) == 0) {
1030 buf = erealloc(buf, (int) (132 +
1031 strlen(fields[ZF_NAME]) +
1032 strlen(zones[i].z_filename)));
1033 (void)sprintf(buf, /* XXX: sprintf is safe */
1034 _("duplicate zone name %s (file \"%s\", line %d)"),
1035 fields[ZF_NAME],
1036 zones[i].z_filename,
1037 zones[i].z_linenum);
1038 error(buf);
1039 return FALSE;
1040 }
1041 return inzsub(fields, nfields, FALSE);
1042 }
1043
1044 static int
1045 inzcont(fields, nfields)
1046 register char ** const fields;
1047 const int nfields;
1048 {
1049 if (nfields < ZONEC_MINFIELDS || nfields > ZONEC_MAXFIELDS) {
1050 error(_("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], _("invalid UTC offset"), TRUE);
1091 if ((cp = strchr(fields[i_format], '%')) != 0) {
1092 if (*++cp != 's' || strchr(cp, '%') != 0) {
1093 error(_("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 if (max_format_len < strlen(z.z_format))
1100 max_format_len = strlen(z.z_format);
1101 hasuntil = nfields > i_untilyear;
1102 if (hasuntil) {
1103 z.z_untilrule.r_filename = filename;
1104 z.z_untilrule.r_linenum = linenum;
1105 rulesub(&z.z_untilrule,
1106 fields[i_untilyear],
1107 "only",
1108 "",
1109 (nfields > i_untilmonth) ?
1110 fields[i_untilmonth] : "Jan",
1111 (nfields > i_untilday) ? fields[i_untilday] : "1",
1112 (nfields > i_untiltime) ? fields[i_untiltime] : "0");
1113 z.z_untiltime = rpytime(&z.z_untilrule,
1114 z.z_untilrule.r_loyear);
1115 if (iscont && nzones > 0 &&
1116 z.z_untiltime > min_time &&
1117 z.z_untiltime < max_time &&
1118 zones[nzones - 1].z_untiltime > min_time &&
1119 zones[nzones - 1].z_untiltime < max_time &&
1120 zones[nzones - 1].z_untiltime >= z.z_untiltime) {
1121 error(_(
1122 "Zone continuation line end time is not after end time of previous line"
1123 ));
1124 return FALSE;
1125 }
1126 }
1127 zones = (struct zone *) (void *) erealloc((char *) zones,
1128 (int) ((nzones + 1) * sizeof *zones));
1129 zones[nzones++] = z;
1130 /*
1131 ** If there was an UNTIL field on this line,
1132 ** there's more information about the zone on the next line.
1133 */
1134 return hasuntil;
1135 }
1136
1137 static void
1138 inleap(fields, nfields)
1139 register char ** const fields;
1140 const int nfields;
1141 {
1142 register const char * cp;
1143 register const struct lookup * lp;
1144 register int i, j;
1145 int year, month, day;
1146 long dayoff, tod;
1147 zic_t t;
1148
1149 if (nfields != LEAP_FIELDS) {
1150 error(_("wrong number of fields on Leap line"));
1151 return;
1152 }
1153 dayoff = 0;
1154 cp = fields[LP_YEAR];
1155 if (sscanf(cp, scheck(cp, "%d"), &year) != 1) {
1156 /*
1157 ** Leapin' Lizards!
1158 */
1159 error(_("invalid leaping year"));
1160 return;
1161 }
1162 if (!leapseen || leapmaxyear < year)
1163 leapmaxyear = year;
1164 if (!leapseen || leapminyear > year)
1165 leapminyear = year;
1166 leapseen = TRUE;
1167 j = EPOCH_YEAR;
1168 while (j != year) {
1169 if (year > j) {
1170 i = len_years[isleap(j)];
1171 ++j;
1172 } else {
1173 --j;
1174 i = -len_years[isleap(j)];
1175 }
1176 dayoff = oadd(dayoff, eitol(i));
1177 }
1178 if ((lp = byword(fields[LP_MONTH], mon_names)) == NULL) {
1179 error(_("invalid month name"));
1180 return;
1181 }
1182 month = lp->l_value;
1183 j = TM_JANUARY;
1184 while (j != month) {
1185 i = len_months[isleap(year)][j];
1186 dayoff = oadd(dayoff, eitol(i));
1187 ++j;
1188 }
1189 cp = fields[LP_DAY];
1190 if (sscanf(cp, scheck(cp, "%d"), &day) != 1 ||
1191 day <= 0 || day > len_months[isleap(year)][month]) {
1192 error(_("invalid day of month"));
1193 return;
1194 }
1195 dayoff = oadd(dayoff, eitol(day - 1));
1196 if (dayoff < 0 && !TYPE_SIGNED(zic_t)) {
1197 error(_("time before zero"));
1198 return;
1199 }
1200 if (dayoff < min_time / SECSPERDAY) {
1201 error(_("time too small"));
1202 return;
1203 }
1204 if (dayoff > max_time / SECSPERDAY) {
1205 error(_("time too large"));
1206 return;
1207 }
1208 t = (zic_t) dayoff * SECSPERDAY;
1209 tod = gethms(fields[LP_TIME], _("invalid time of day"), FALSE);
1210 cp = fields[LP_CORR];
1211 {
1212 register int positive;
1213 int count;
1214
1215 if (strcmp(cp, "") == 0) { /* infile() turns "-" into "" */
1216 positive = FALSE;
1217 count = 1;
1218 } else if (strcmp(cp, "--") == 0) {
1219 positive = FALSE;
1220 count = 2;
1221 } else if (strcmp(cp, "+") == 0) {
1222 positive = TRUE;
1223 count = 1;
1224 } else if (strcmp(cp, "++") == 0) {
1225 positive = TRUE;
1226 count = 2;
1227 } else {
1228 error(_("illegal CORRECTION field on Leap line"));
1229 return;
1230 }
1231 if ((lp = byword(fields[LP_ROLL], leap_types)) == NULL) {
1232 error(_(
1233 "illegal Rolling/Stationary field on Leap line"
1234 ));
1235 return;
1236 }
1237 leapadd(tadd(t, tod), positive, lp->l_value, count);
1238 }
1239 }
1240
1241 static void
1242 inlink(fields, nfields)
1243 register char ** const fields;
1244 const int nfields;
1245 {
1246 struct link l;
1247
1248 if (nfields != LINK_FIELDS) {
1249 error(_("wrong number of fields on Link line"));
1250 return;
1251 }
1252 if (*fields[LF_FROM] == '\0') {
1253 error(_("blank FROM field on Link line"));
1254 return;
1255 }
1256 if (*fields[LF_TO] == '\0') {
1257 error(_("blank TO field on Link line"));
1258 return;
1259 }
1260 l.l_filename = filename;
1261 l.l_linenum = linenum;
1262 l.l_from = ecpyalloc(fields[LF_FROM]);
1263 l.l_to = ecpyalloc(fields[LF_TO]);
1264 links = (struct link *) (void *) erealloc((char *) links,
1265 (int) ((nlinks + 1) * sizeof *links));
1266 links[nlinks++] = l;
1267 }
1268
1269 static void
1270 rulesub(rp, loyearp, hiyearp, typep, monthp, dayp, timep)
1271 register struct rule * const rp;
1272 const char * const loyearp;
1273 const char * const hiyearp;
1274 const char * const typep;
1275 const char * const monthp;
1276 const char * const dayp;
1277 const char * const timep;
1278 {
1279 register const struct lookup * lp;
1280 register const char * cp;
1281 register char * dp;
1282 register char * ep;
1283
1284 if ((lp = byword(monthp, mon_names)) == NULL) {
1285 error(_("invalid month name"));
1286 return;
1287 }
1288 rp->r_month = lp->l_value;
1289 rp->r_todisstd = FALSE;
1290 rp->r_todisgmt = FALSE;
1291 dp = ecpyalloc(timep);
1292 if (*dp != '\0') {
1293 ep = dp + strlen(dp) - 1;
1294 switch (lowerit(*ep)) {
1295 case 's': /* Standard */
1296 rp->r_todisstd = TRUE;
1297 rp->r_todisgmt = FALSE;
1298 *ep = '\0';
1299 break;
1300 case 'w': /* Wall */
1301 rp->r_todisstd = FALSE;
1302 rp->r_todisgmt = FALSE;
1303 *ep = '\0';
1304 break;
1305 case 'g': /* Greenwich */
1306 case 'u': /* Universal */
1307 case 'z': /* Zulu */
1308 rp->r_todisstd = TRUE;
1309 rp->r_todisgmt = TRUE;
1310 *ep = '\0';
1311 break;
1312 }
1313 }
1314 rp->r_tod = gethms(dp, _("invalid time of day"), FALSE);
1315 ifree(dp);
1316 /*
1317 ** Year work.
1318 */
1319 cp = loyearp;
1320 lp = byword(cp, begin_years);
1321 rp->r_lowasnum = lp == NULL;
1322 if (!rp->r_lowasnum) switch ((int) lp->l_value) {
1323 case YR_MINIMUM:
1324 rp->r_loyear = INT_MIN;
1325 break;
1326 case YR_MAXIMUM:
1327 rp->r_loyear = INT_MAX;
1328 break;
1329 default: /* "cannot happen" */
1330 (void) fprintf(stderr,
1331 _("%s: panic: Invalid l_value %d\n"),
1332 progname, lp->l_value);
1333 exit(EXIT_FAILURE);
1334 } else if (sscanf(cp, scheck(cp, "%d"), &rp->r_loyear) != 1) {
1335 error(_("invalid starting year"));
1336 return;
1337 }
1338 cp = hiyearp;
1339 lp = byword(cp, end_years);
1340 rp->r_hiwasnum = lp == NULL;
1341 if (!rp->r_hiwasnum) 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 _("%s: panic: Invalid l_value %d\n"),
1354 progname, lp->l_value);
1355 exit(EXIT_FAILURE);
1356 } else if (sscanf(cp, scheck(cp, "%d"), &rp->r_hiyear) != 1) {
1357 error(_("invalid ending year"));
1358 return;
1359 }
1360 if (rp->r_loyear > rp->r_hiyear) {
1361 error(_("starting year greater than ending year"));
1362 return;
1363 }
1364 if (*typep == '\0')
1365 rp->r_yrtype = NULL;
1366 else {
1367 if (rp->r_loyear == rp->r_hiyear) {
1368 error(_("typed single year"));
1369 return;
1370 }
1371 rp->r_yrtype = ecpyalloc(typep);
1372 }
1373 /*
1374 ** Day work.
1375 ** Accept things such as:
1376 ** 1
1377 ** last-Sunday
1378 ** Sun<=20
1379 ** Sun>=7
1380 */
1381 dp = ecpyalloc(dayp);
1382 if ((lp = byword(dp, lasts)) != NULL) {
1383 rp->r_dycode = DC_DOWLEQ;
1384 rp->r_wday = lp->l_value;
1385 rp->r_dayofmonth = len_months[1][rp->r_month];
1386 } else {
1387 if ((ep = strchr(dp, '<')) != 0)
1388 rp->r_dycode = DC_DOWLEQ;
1389 else if ((ep = strchr(dp, '>')) != 0)
1390 rp->r_dycode = DC_DOWGEQ;
1391 else {
1392 ep = dp;
1393 rp->r_dycode = DC_DOM;
1394 }
1395 if (rp->r_dycode != DC_DOM) {
1396 *ep++ = 0;
1397 if (*ep++ != '=') {
1398 error(_("invalid day of month"));
1399 ifree(dp);
1400 return;
1401 }
1402 if ((lp = byword(dp, wday_names)) == NULL) {
1403 error(_("invalid weekday name"));
1404 ifree(dp);
1405 return;
1406 }
1407 rp->r_wday = lp->l_value;
1408 }
1409 if (sscanf(ep, scheck(ep, "%d"), &rp->r_dayofmonth) != 1 ||
1410 rp->r_dayofmonth <= 0 ||
1411 (rp->r_dayofmonth > len_months[1][rp->r_month])) {
1412 error(_("invalid day of month"));
1413 ifree(dp);
1414 return;
1415 }
1416 }
1417 ifree(dp);
1418 }
1419
1420 static void
1421 convert(val, buf)
1422 const long val;
1423 char * const buf;
1424 {
1425 register int i;
1426 register int shift;
1427
1428 for (i = 0, shift = 24; i < 4; ++i, shift -= 8)
1429 buf[i] = val >> shift;
1430 }
1431
1432 static void
1433 convert64(val, buf)
1434 const zic_t val;
1435 char * const buf;
1436 {
1437 register int i;
1438 register int shift;
1439
1440 for (i = 0, shift = 56; i < 8; ++i, shift -= 8)
1441 buf[i] = val >> shift;
1442 }
1443
1444 static void
1445 puttzcode(val, fp)
1446 const long val;
1447 FILE * const fp;
1448 {
1449 char buf[4];
1450
1451 convert(val, buf);
1452 (void) fwrite((void *) buf, (size_t) sizeof buf, (size_t) 1, fp);
1453 }
1454
1455 static void
1456 puttzcode64(val, fp)
1457 const zic_t val;
1458 FILE * const fp;
1459 {
1460 char buf[8];
1461
1462 convert64(val, buf);
1463 (void) fwrite((void *) buf, (size_t) sizeof buf, (size_t) 1, fp);
1464 }
1465
1466 static int
1467 atcomp(avp, bvp)
1468 const void * avp;
1469 const void * bvp;
1470 {
1471 const zic_t a = ((const struct attype *) avp)->at;
1472 const zic_t b = ((const struct attype *) bvp)->at;
1473
1474 return (a < b) ? -1 : (a > b);
1475 }
1476
1477 static int
1478 is32(x)
1479 const zic_t x;
1480 {
1481 return INT32_MIN <= x && x <= INT32_MAX;
1482 }
1483
1484 static void
1485 writezone(name, string)
1486 const char * const name;
1487 const char * const string;
1488 {
1489 register FILE * fp;
1490 register int i, j;
1491 register int leapcnt32, leapi32;
1492 register int timecnt32, timei32;
1493 register int pass;
1494 static char * fullname;
1495 static const struct tzhead tzh0;
1496 static struct tzhead tzh;
1497 zic_t ats[TZ_MAX_TIMES];
1498 unsigned char types[TZ_MAX_TIMES];
1499
1500 /*
1501 ** Sort.
1502 */
1503 if (timecnt > 1)
1504 (void) qsort((void *) attypes, (size_t) timecnt,
1505 (size_t) sizeof *attypes, atcomp);
1506 /*
1507 ** Optimize.
1508 */
1509 {
1510 int fromi;
1511 int toi;
1512
1513 toi = 0;
1514 fromi = 0;
1515 while (fromi < timecnt && attypes[fromi].at < min_time)
1516 ++fromi;
1517 if (isdsts[0] == 0)
1518 while (fromi < timecnt && attypes[fromi].type == 0)
1519 ++fromi; /* handled by default rule */
1520 for ( ; fromi < timecnt; ++fromi) {
1521 if (toi != 0 && ((attypes[fromi].at +
1522 gmtoffs[attypes[toi - 1].type]) <=
1523 (attypes[toi - 1].at + gmtoffs[toi == 1 ? 0
1524 : attypes[toi - 2].type]))) {
1525 attypes[toi - 1].type =
1526 attypes[fromi].type;
1527 continue;
1528 }
1529 if (toi == 0 ||
1530 attypes[toi - 1].type != attypes[fromi].type)
1531 attypes[toi++] = attypes[fromi];
1532 }
1533 timecnt = toi;
1534 }
1535 /*
1536 ** Transfer.
1537 */
1538 for (i = 0; i < timecnt; ++i) {
1539 ats[i] = attypes[i].at;
1540 types[i] = attypes[i].type;
1541 }
1542 /*
1543 ** Correct for leap seconds.
1544 */
1545 for (i = 0; i < timecnt; ++i) {
1546 j = leapcnt;
1547 while (--j >= 0)
1548 if (ats[i] > trans[j] - corr[j]) {
1549 ats[i] = tadd(ats[i], corr[j]);
1550 break;
1551 }
1552 }
1553 /*
1554 ** Figure out 32-bit-limited starts and counts.
1555 */
1556 timecnt32 = timecnt;
1557 timei32 = 0;
1558 leapcnt32 = leapcnt;
1559 leapi32 = 0;
1560 while (timecnt32 > 0 && !is32(ats[timecnt32 - 1]))
1561 --timecnt32;
1562 while (timecnt32 > 0 && !is32(ats[timei32])) {
1563 --timecnt32;
1564 ++timei32;
1565 }
1566 while (leapcnt32 > 0 && !is32(trans[leapcnt32 - 1]))
1567 --leapcnt32;
1568 while (leapcnt32 > 0 && !is32(trans[leapi32])) {
1569 --leapcnt32;
1570 ++leapi32;
1571 }
1572 fullname = erealloc(fullname,
1573 (int) (strlen(directory) + 1 + strlen(name) + 1));
1574 (void) sprintf(fullname, "%s/%s", directory, name); /* XXX: sprintf is safe */
1575 /*
1576 ** Remove old file, if any, to snap links.
1577 */
1578 if (!itsdir(fullname) && remove(fullname) != 0 && errno != ENOENT) {
1579 const char *e = strerror(errno);
1580
1581 (void) fprintf(stderr, _("%s: Can't remove %s: %s\n"),
1582 progname, fullname, e);
1583 exit(EXIT_FAILURE);
1584 }
1585 if ((fp = fopen(fullname, "wb")) == NULL) {
1586 if (mkdirs(fullname) != 0)
1587 exit(EXIT_FAILURE);
1588 if ((fp = fopen(fullname, "wb")) == NULL) {
1589 const char *e = strerror(errno);
1590
1591 (void) fprintf(stderr, _("%s: Can't create %s: %s\n"),
1592 progname, fullname, e);
1593 exit(EXIT_FAILURE);
1594 }
1595 }
1596 for (pass = 1; pass <= 2; ++pass) {
1597 register int thistimei, thistimecnt;
1598 register int thisleapi, thisleapcnt;
1599 register int thistimelim, thisleaplim;
1600 int writetype[TZ_MAX_TIMES];
1601 int typemap[TZ_MAX_TYPES];
1602 register int thistypecnt;
1603 char thischars[TZ_MAX_CHARS];
1604 char thischarcnt;
1605 int indmap[TZ_MAX_CHARS];
1606
1607 if (pass == 1) {
1608 thistimei = timei32;
1609 thistimecnt = timecnt32;
1610 thisleapi = leapi32;
1611 thisleapcnt = leapcnt32;
1612 } else {
1613 thistimei = 0;
1614 thistimecnt = timecnt;
1615 thisleapi = 0;
1616 thisleapcnt = leapcnt;
1617 }
1618 thistimelim = thistimei + thistimecnt;
1619 thisleaplim = thisleapi + thisleapcnt;
1620 for (i = 0; i < typecnt; ++i)
1621 writetype[i] = thistimecnt == timecnt;
1622 if (thistimecnt == 0) {
1623 /*
1624 ** No transition times fall in the current
1625 ** (32- or 64-bit) window.
1626 */
1627 if (typecnt != 0)
1628 writetype[typecnt - 1] = TRUE;
1629 } else {
1630 for (i = thistimei - 1; i < thistimelim; ++i)
1631 if (i >= 0)
1632 writetype[types[i]] = TRUE;
1633 /*
1634 ** For America/Godthab and Antarctica/Palmer
1635 */
1636 if (thistimei == 0)
1637 writetype[0] = TRUE;
1638 }
1639 #ifndef LEAVE_SOME_PRE_2011_SYSTEMS_IN_THE_LURCH
1640 /*
1641 ** For some pre-2011 systems: if the last-to-be-written
1642 ** standard (or daylight) type has an offset different from the
1643 ** most recently used offset,
1644 ** append an (unused) copy of the most recently used type
1645 ** (to help get global "altzone" and "timezone" variables
1646 ** set correctly).
1647 */
1648 {
1649 register int mrudst, mrustd, hidst, histd, type;
1650
1651 hidst = histd = mrudst = mrustd = -1;
1652 for (i = thistimei; i < thistimelim; ++i)
1653 if (isdsts[types[i]])
1654 mrudst = types[i];
1655 else mrustd = types[i];
1656 for (i = 0; i < typecnt; ++i)
1657 if (writetype[i]) {
1658 if (isdsts[i])
1659 hidst = i;
1660 else histd = i;
1661 }
1662 if (hidst >= 0 && mrudst >= 0 && hidst != mrudst &&
1663 gmtoffs[hidst] != gmtoffs[mrudst]) {
1664 isdsts[mrudst] = -1;
1665 type = addtype(gmtoffs[mrudst],
1666 &chars[abbrinds[mrudst]],
1667 TRUE,
1668 ttisstds[mrudst],
1669 ttisgmts[mrudst]);
1670 isdsts[mrudst] = TRUE;
1671 writetype[type] = TRUE;
1672 }
1673 if (histd >= 0 && mrustd >= 0 && histd != mrustd &&
1674 gmtoffs[histd] != gmtoffs[mrustd]) {
1675 isdsts[mrustd] = -1;
1676 type = addtype(gmtoffs[mrustd],
1677 &chars[abbrinds[mrustd]],
1678 FALSE,
1679 ttisstds[mrustd],
1680 ttisgmts[mrustd]);
1681 isdsts[mrustd] = FALSE;
1682 writetype[type] = TRUE;
1683 }
1684 }
1685 #endif /* !defined LEAVE_SOME_PRE_2011_SYSTEMS_IN_THE_LURCH */
1686 thistypecnt = 0;
1687 for (i = 0; i < typecnt; ++i)
1688 typemap[i] = writetype[i] ? thistypecnt++ : -1;
1689 for (i = 0; i < sizeof indmap / sizeof indmap[0]; ++i)
1690 indmap[i] = -1;
1691 thischarcnt = 0;
1692 for (i = 0; i < typecnt; ++i) {
1693 register char * thisabbr;
1694
1695 if (!writetype[i])
1696 continue;
1697 if (indmap[abbrinds[i]] >= 0)
1698 continue;
1699 thisabbr = &chars[abbrinds[i]];
1700 for (j = 0; j < thischarcnt; ++j)
1701 if (strcmp(&thischars[j], thisabbr) == 0)
1702 break;
1703 if (j == thischarcnt) {
1704 (void) strcpy(&thischars[(int) thischarcnt],
1705 thisabbr);
1706 thischarcnt += strlen(thisabbr) + 1;
1707 }
1708 indmap[abbrinds[i]] = j;
1709 }
1710 #define DO(field) (void) fwrite((void *) tzh.field, \
1711 (size_t) sizeof tzh.field, (size_t) 1, fp)
1712 tzh = tzh0;
1713 (void) strncpy(tzh.tzh_magic, TZ_MAGIC, sizeof tzh.tzh_magic);
1714 tzh.tzh_version[0] = ZIC_VERSION;
1715 convert(eitol(thistypecnt), tzh.tzh_ttisgmtcnt);
1716 convert(eitol(thistypecnt), tzh.tzh_ttisstdcnt);
1717 convert(eitol(thisleapcnt), tzh.tzh_leapcnt);
1718 convert(eitol(thistimecnt), tzh.tzh_timecnt);
1719 convert(eitol(thistypecnt), tzh.tzh_typecnt);
1720 convert(eitol(thischarcnt), tzh.tzh_charcnt);
1721 DO(tzh_magic);
1722 DO(tzh_version);
1723 DO(tzh_reserved);
1724 DO(tzh_ttisgmtcnt);
1725 DO(tzh_ttisstdcnt);
1726 DO(tzh_leapcnt);
1727 DO(tzh_timecnt);
1728 DO(tzh_typecnt);
1729 DO(tzh_charcnt);
1730 #undef DO
1731 for (i = thistimei; i < thistimelim; ++i)
1732 if (pass == 1)
1733 puttzcode((long) ats[i], fp);
1734 else puttzcode64(ats[i], fp);
1735 for (i = thistimei; i < thistimelim; ++i) {
1736 unsigned char uc;
1737
1738 uc = typemap[types[i]];
1739 (void) fwrite((void *) &uc,
1740 (size_t) sizeof uc,
1741 (size_t) 1,
1742 fp);
1743 }
1744 for (i = 0; i < typecnt; ++i)
1745 if (writetype[i]) {
1746 puttzcode(gmtoffs[i], fp);
1747 (void) putc(isdsts[i], fp);
1748 (void) putc((unsigned char) indmap[abbrinds[i]], fp);
1749 }
1750 if (thischarcnt != 0)
1751 (void) fwrite((void *) thischars,
1752 (size_t) sizeof thischars[0],
1753 (size_t) thischarcnt, fp);
1754 for (i = thisleapi; i < thisleaplim; ++i) {
1755 register zic_t todo;
1756
1757 if (roll[i]) {
1758 if (timecnt == 0 || trans[i] < ats[0]) {
1759 j = 0;
1760 while (isdsts[j])
1761 if (++j >= typecnt) {
1762 j = 0;
1763 break;
1764 }
1765 } else {
1766 j = 1;
1767 while (j < timecnt &&
1768 trans[i] >= ats[j])
1769 ++j;
1770 j = types[j - 1];
1771 }
1772 todo = tadd(trans[i], -gmtoffs[j]);
1773 } else todo = trans[i];
1774 if (pass == 1)
1775 puttzcode((long) todo, fp);
1776 else puttzcode64(todo, fp);
1777 puttzcode(corr[i], fp);
1778 }
1779 for (i = 0; i < typecnt; ++i)
1780 if (writetype[i])
1781 (void) putc(ttisstds[i], fp);
1782 for (i = 0; i < typecnt; ++i)
1783 if (writetype[i])
1784 (void) putc(ttisgmts[i], fp);
1785 }
1786 (void) fprintf(fp, "\n%s\n", string);
1787 if (ferror(fp) || fclose(fp)) {
1788 (void) fprintf(stderr, _("%s: Error writing %s\n"),
1789 progname, fullname);
1790 exit(EXIT_FAILURE);
1791 }
1792 }
1793
1794 static void
1795 doabbr(abbr, abbrlen, format, letters, isdst, doquotes)
1796 char * const abbr;
1797 const int abbrlen;
1798 const char * const format;
1799 const char * const letters;
1800 const int isdst;
1801 const int doquotes;
1802 {
1803 register char * cp;
1804 register char * slashp;
1805 register int len;
1806
1807 slashp = strchr(format, '/');
1808 if (slashp == NULL) {
1809 if (letters == NULL)
1810 (void) strlcpy(abbr, format, abbrlen);
1811 else (void) snprintf(abbr, abbrlen, format, letters);
1812 } else if (isdst) {
1813 (void) strlcpy(abbr, slashp + 1, abbrlen);
1814 } else {
1815 if (slashp > format)
1816 (void) strncpy(abbr, format,
1817 (unsigned) (slashp - format));
1818 abbr[slashp - format] = '\0';
1819 }
1820 if (!doquotes)
1821 return;
1822 for (cp = abbr; *cp != '\0'; ++cp)
1823 if (strchr("ABCDEFGHIJKLMNOPQRSTUVWXYZ", *cp) == NULL &&
1824 strchr("abcdefghijklmnopqrstuvwxyz", *cp) == NULL)
1825 break;
1826 len = strlen(abbr);
1827 if (len > 0 && *cp == '\0')
1828 return;
1829 abbr[len + 2] = '\0';
1830 abbr[len + 1] = '>';
1831 for ( ; len > 0; --len)
1832 abbr[len] = abbr[len - 1];
1833 abbr[0] = '<';
1834 }
1835
1836 static void
1837 updateminmax(x)
1838 const int x;
1839 {
1840 if (min_year > x)
1841 min_year = x;
1842 if (max_year < x)
1843 max_year = x;
1844 }
1845
1846 static int
1847 stringoffset(result, offset)
1848 char * result;
1849 long offset;
1850 {
1851 register int hours;
1852 register int minutes;
1853 register int seconds;
1854
1855 result[0] = '\0';
1856 if (offset < 0) {
1857 (void) strcpy(result, "-");
1858 offset = -offset;
1859 }
1860 seconds = offset % SECSPERMIN;
1861 offset /= SECSPERMIN;
1862 minutes = offset % MINSPERHOUR;
1863 offset /= MINSPERHOUR;
1864 hours = offset;
1865 if (hours >= HOURSPERDAY) {
1866 result[0] = '\0';
1867 return -1;
1868 }
1869 (void) sprintf(end(result), "%d", hours);
1870 if (minutes != 0 || seconds != 0) {
1871 (void) sprintf(end(result), ":%02d", minutes);
1872 if (seconds != 0)
1873 (void) sprintf(end(result), ":%02d", seconds);
1874 }
1875 return 0;
1876 }
1877
1878 static int
1879 stringrule(result, rp, dstoff, gmtoff)
1880 char * result;
1881 const struct rule * const rp;
1882 const long dstoff;
1883 const long gmtoff;
1884 {
1885 register long tod;
1886
1887 result = end(result);
1888 if (rp->r_dycode == DC_DOM) {
1889 register int month, total;
1890
1891 if (rp->r_dayofmonth == 29 && rp->r_month == TM_FEBRUARY)
1892 return -1;
1893 total = 0;
1894 for (month = 0; month < rp->r_month; ++month)
1895 total += len_months[0][month];
1896 (void) sprintf(result, "J%d", total + rp->r_dayofmonth);
1897 } else {
1898 register int week;
1899
1900 if (rp->r_dycode == DC_DOWGEQ) {
1901 if ((rp->r_dayofmonth % DAYSPERWEEK) != 1)
1902 return -1;
1903 week = 1 + rp->r_dayofmonth / DAYSPERWEEK;
1904 } else if (rp->r_dycode == DC_DOWLEQ) {
1905 if (rp->r_dayofmonth == len_months[1][rp->r_month])
1906 week = 5;
1907 else {
1908 if ((rp->r_dayofmonth % DAYSPERWEEK) != 0)
1909 return -1;
1910 week = rp->r_dayofmonth / DAYSPERWEEK;
1911 }
1912 } else return -1; /* "cannot happen" */
1913 (void) sprintf(result, "M%d.%d.%d",
1914 rp->r_month + 1, week, rp->r_wday);
1915 }
1916 tod = rp->r_tod;
1917 if (rp->r_todisgmt)
1918 tod += gmtoff;
1919 if (rp->r_todisstd && rp->r_stdoff == 0)
1920 tod += dstoff;
1921 if (tod < 0) {
1922 result[0] = '\0';
1923 return -1;
1924 }
1925 if (tod != 2 * SECSPERMIN * MINSPERHOUR) {
1926 (void) strcat(result, "/");
1927 if (stringoffset(end(result), tod) != 0)
1928 return -1;
1929 }
1930 return 0;
1931 }
1932
1933 static void
1934 stringzone(result, resultlen, zpfirst, zonecount)
1935 char * result;
1936 const int resultlen;
1937 const struct zone * const zpfirst;
1938 const int zonecount;
1939 {
1940 register const struct zone * zp;
1941 register struct rule * rp;
1942 register struct rule * stdrp;
1943 register struct rule * dstrp;
1944 register int i;
1945 register const char * abbrvar;
1946
1947 result[0] = '\0';
1948 zp = zpfirst + zonecount - 1;
1949 stdrp = dstrp = NULL;
1950 for (i = 0; i < zp->z_nrules; ++i) {
1951 rp = &zp->z_rules[i];
1952 if (rp->r_hiwasnum || rp->r_hiyear != INT_MAX)
1953 continue;
1954 if (rp->r_yrtype != NULL)
1955 continue;
1956 if (rp->r_stdoff == 0) {
1957 if (stdrp == NULL)
1958 stdrp = rp;
1959 else return;
1960 } else {
1961 if (dstrp == NULL)
1962 dstrp = rp;
1963 else return;
1964 }
1965 }
1966 if (stdrp == NULL && dstrp == NULL) {
1967 /*
1968 ** There are no rules running through "max".
1969 ** Let's find the latest rule.
1970 */
1971 for (i = 0; i < zp->z_nrules; ++i) {
1972 rp = &zp->z_rules[i];
1973 if (stdrp == NULL || rp->r_hiyear > stdrp->r_hiyear ||
1974 (rp->r_hiyear == stdrp->r_hiyear &&
1975 rp->r_month > stdrp->r_month))
1976 stdrp = rp;
1977 }
1978 if (stdrp != NULL && stdrp->r_stdoff != 0)
1979 return; /* We end up in DST (a POSIX no-no). */
1980 /*
1981 ** Horrid special case: if year is 2037,
1982 ** presume this is a zone handled on a year-by-year basis;
1983 ** do not try to apply a rule to the zone.
1984 */
1985 if (stdrp != NULL && stdrp->r_hiyear == 2037)
1986 return;
1987 }
1988 if (stdrp == NULL && (zp->z_nrules != 0 || zp->z_stdoff != 0))
1989 return;
1990 abbrvar = (stdrp == NULL) ? "" : stdrp->r_abbrvar;
1991 doabbr(result, resultlen, zp->z_format, abbrvar, FALSE, TRUE);
1992 if (stringoffset(end(result), -zp->z_gmtoff) != 0) {
1993 result[0] = '\0';
1994 return;
1995 }
1996 if (dstrp == NULL)
1997 return;
1998 doabbr(end(result), resultlen - strlen(result),
1999 zp->z_format, dstrp->r_abbrvar, TRUE, TRUE);
2000 if (dstrp->r_stdoff != SECSPERMIN * MINSPERHOUR)
2001 if (stringoffset(end(result),
2002 -(zp->z_gmtoff + dstrp->r_stdoff)) != 0) {
2003 result[0] = '\0';
2004 return;
2005 }
2006 (void) strcat(result, ",");
2007 if (stringrule(result, dstrp, dstrp->r_stdoff, zp->z_gmtoff) != 0) {
2008 result[0] = '\0';
2009 return;
2010 }
2011 (void) strcat(result, ",");
2012 if (stringrule(result, stdrp, dstrp->r_stdoff, zp->z_gmtoff) != 0) {
2013 result[0] = '\0';
2014 return;
2015 }
2016 }
2017
2018 static void
2019 outzone(zpfirst, zonecount)
2020 const struct zone * const zpfirst;
2021 const int zonecount;
2022 {
2023 register const struct zone * zp;
2024 register struct rule * rp;
2025 register int i, j;
2026 register int usestart, useuntil;
2027 register zic_t starttime, untiltime;
2028 register long gmtoff;
2029 register long stdoff;
2030 register int year;
2031 register long startoff;
2032 register int startttisstd;
2033 register int startttisgmt;
2034 register int type;
2035 register char * startbuf;
2036 register char * ab;
2037 register char * envvar;
2038 register int max_abbr_len;
2039 register int max_envvar_len;
2040 register int prodstic; /* all rules are min to max */
2041
2042 max_abbr_len = 2 + max_format_len + max_abbrvar_len;
2043 max_envvar_len = 2 * max_abbr_len + 5 * 9;
2044 startbuf = emalloc(max_abbr_len + 1);
2045 ab = emalloc(max_abbr_len + 1);
2046 envvar = emalloc(max_envvar_len + 1);
2047 INITIALIZE(untiltime);
2048 INITIALIZE(starttime);
2049 /*
2050 ** Now. . .finally. . .generate some useful data!
2051 */
2052 timecnt = 0;
2053 typecnt = 0;
2054 charcnt = 0;
2055 prodstic = zonecount == 1;
2056 /*
2057 ** Thanks to Earl Chew
2058 ** for noting the need to unconditionally initialize startttisstd.
2059 */
2060 startttisstd = FALSE;
2061 startttisgmt = FALSE;
2062 min_year = max_year = EPOCH_YEAR;
2063 if (leapseen) {
2064 updateminmax(leapminyear);
2065 updateminmax(leapmaxyear + (leapmaxyear < INT_MAX));
2066 }
2067 for (i = 0; i < zonecount; ++i) {
2068 zp = &zpfirst[i];
2069 if (i < zonecount - 1)
2070 updateminmax(zp->z_untilrule.r_loyear);
2071 for (j = 0; j < zp->z_nrules; ++j) {
2072 rp = &zp->z_rules[j];
2073 if (rp->r_lowasnum)
2074 updateminmax(rp->r_loyear);
2075 if (rp->r_hiwasnum)
2076 updateminmax(rp->r_hiyear);
2077 }
2078 }
2079 /*
2080 ** Generate lots of data if a rule can't cover all future times.
2081 */
2082 stringzone(envvar, max_envvar_len+1, zpfirst, zonecount);
2083 if (noise && envvar[0] == '\0') {
2084 register char * wp;
2085
2086 wp = ecpyalloc(_("no POSIX environment variable for zone"));
2087 wp = ecatalloc(wp, " ");
2088 wp = ecatalloc(wp, zpfirst->z_name);
2089 warning(wp);
2090 ifree(wp);
2091 }
2092 if (envvar[0] == '\0') {
2093 if (min_year >= INT_MIN + YEARSPERREPEAT)
2094 min_year -= YEARSPERREPEAT;
2095 else min_year = INT_MIN;
2096 if (max_year <= INT_MAX - YEARSPERREPEAT)
2097 max_year += YEARSPERREPEAT;
2098 else max_year = INT_MAX;
2099 /*
2100 ** Regardless of any of the above,
2101 ** for a "proDSTic" zone which specifies that its rules
2102 ** always have and always will be in effect,
2103 ** we only need one cycle to define the zone.
2104 */
2105 if (prodstic) {
2106 min_year = 1900;
2107 max_year = min_year + YEARSPERREPEAT;
2108 }
2109 }
2110 /*
2111 ** For the benefit of older systems,
2112 ** generate data from 1900 through 2037.
2113 */
2114 if (min_year > 1900)
2115 min_year = 1900;
2116 if (max_year < 2037)
2117 max_year = 2037;
2118 for (i = 0; i < zonecount; ++i) {
2119 /*
2120 ** A guess that may well be corrected later.
2121 */
2122 stdoff = 0;
2123 zp = &zpfirst[i];
2124 usestart = i > 0 && (zp - 1)->z_untiltime > min_time;
2125 useuntil = i < (zonecount - 1);
2126 if (useuntil && zp->z_untiltime <= min_time)
2127 continue;
2128 gmtoff = zp->z_gmtoff;
2129 eat(zp->z_filename, zp->z_linenum);
2130 *startbuf = '\0';
2131 startoff = zp->z_gmtoff;
2132 if (zp->z_nrules == 0) {
2133 stdoff = zp->z_stdoff;
2134 doabbr(startbuf, max_abbr_len + 1, zp->z_format,
2135 (char *) NULL, stdoff != 0, FALSE);
2136 type = addtype(oadd(zp->z_gmtoff, stdoff),
2137 startbuf, stdoff != 0, startttisstd,
2138 startttisgmt);
2139 if (usestart) {
2140 addtt(starttime, type);
2141 usestart = FALSE;
2142 } else if (stdoff != 0)
2143 addtt(min_time, type);
2144 } else for (year = min_year; year <= max_year; ++year) {
2145 if (useuntil && year > zp->z_untilrule.r_hiyear)
2146 break;
2147 /*
2148 ** Mark which rules to do in the current year.
2149 ** For those to do, calculate rpytime(rp, year);
2150 */
2151 for (j = 0; j < zp->z_nrules; ++j) {
2152 rp = &zp->z_rules[j];
2153 eats(zp->z_filename, zp->z_linenum,
2154 rp->r_filename, rp->r_linenum);
2155 rp->r_todo = year >= rp->r_loyear &&
2156 year <= rp->r_hiyear &&
2157 yearistype(year, rp->r_yrtype);
2158 if (rp->r_todo)
2159 rp->r_temp = rpytime(rp, year);
2160 }
2161 for ( ; ; ) {
2162 register int k;
2163 register zic_t jtime, ktime;
2164 register long offset;
2165
2166 INITIALIZE(ktime);
2167 if (useuntil) {
2168 /*
2169 ** Turn untiltime into UTC
2170 ** assuming the current gmtoff and
2171 ** stdoff values.
2172 */
2173 untiltime = zp->z_untiltime;
2174 if (!zp->z_untilrule.r_todisgmt)
2175 untiltime = tadd(untiltime,
2176 -gmtoff);
2177 if (!zp->z_untilrule.r_todisstd)
2178 untiltime = tadd(untiltime,
2179 -stdoff);
2180 }
2181 /*
2182 ** Find the rule (of those to do, if any)
2183 ** that takes effect earliest in the year.
2184 */
2185 k = -1;
2186 for (j = 0; j < zp->z_nrules; ++j) {
2187 rp = &zp->z_rules[j];
2188 if (!rp->r_todo)
2189 continue;
2190 eats(zp->z_filename, zp->z_linenum,
2191 rp->r_filename, rp->r_linenum);
2192 offset = rp->r_todisgmt ? 0 : gmtoff;
2193 if (!rp->r_todisstd)
2194 offset = oadd(offset, stdoff);
2195 jtime = rp->r_temp;
2196 if (jtime == min_time ||
2197 jtime == max_time)
2198 continue;
2199 jtime = tadd(jtime, -offset);
2200 if (k < 0 || jtime < ktime) {
2201 k = j;
2202 ktime = jtime;
2203 }
2204 }
2205 if (k < 0)
2206 break; /* go on to next year */
2207 rp = &zp->z_rules[k];
2208 rp->r_todo = FALSE;
2209 if (useuntil && ktime >= untiltime)
2210 break;
2211 stdoff = rp->r_stdoff;
2212 if (usestart && ktime == starttime)
2213 usestart = FALSE;
2214 if (usestart) {
2215 if (ktime < starttime) {
2216 startoff = oadd(zp->z_gmtoff,
2217 stdoff);
2218 doabbr(startbuf,
2219 max_abbr_len + 1,
2220 zp->z_format,
2221 rp->r_abbrvar,
2222 rp->r_stdoff != 0,
2223 FALSE);
2224 continue;
2225 }
2226 if (*startbuf == '\0' &&
2227 startoff == oadd(zp->z_gmtoff,
2228 stdoff)) {
2229 doabbr(startbuf,
2230 max_abbr_len + 1,
2231 zp->z_format,
2232 rp->r_abbrvar,
2233 rp->r_stdoff !=
2234 0,
2235 FALSE);
2236 }
2237 }
2238 eats(zp->z_filename, zp->z_linenum,
2239 rp->r_filename, rp->r_linenum);
2240 doabbr(ab, max_abbr_len+1, zp->z_format, rp->r_abbrvar,
2241 rp->r_stdoff != 0, FALSE);
2242 offset = oadd(zp->z_gmtoff, rp->r_stdoff);
2243 type = addtype(offset, ab, rp->r_stdoff != 0,
2244 rp->r_todisstd, rp->r_todisgmt);
2245 addtt(ktime, type);
2246 }
2247 }
2248 if (usestart) {
2249 if (*startbuf == '\0' &&
2250 zp->z_format != NULL &&
2251 strchr(zp->z_format, '%') == NULL &&
2252 strchr(zp->z_format, '/') == NULL)
2253 (void)strncpy(startbuf, zp->z_format,
2254 max_abbr_len + 1 - 1);
2255 eat(zp->z_filename, zp->z_linenum);
2256 if (*startbuf == '\0')
2257 error(_("can't determine time zone abbreviation to use just after until time"));
2258 else addtt(starttime,
2259 addtype(startoff, startbuf,
2260 startoff != zp->z_gmtoff,
2261 startttisstd,
2262 startttisgmt));
2263 }
2264 /*
2265 ** Now we may get to set starttime for the next zone line.
2266 */
2267 if (useuntil) {
2268 startttisstd = zp->z_untilrule.r_todisstd;
2269 startttisgmt = zp->z_untilrule.r_todisgmt;
2270 starttime = zp->z_untiltime;
2271 if (!startttisstd)
2272 starttime = tadd(starttime, -stdoff);
2273 if (!startttisgmt)
2274 starttime = tadd(starttime, -gmtoff);
2275 }
2276 }
2277 writezone(zpfirst->z_name, envvar);
2278 ifree(startbuf);
2279 ifree(ab);
2280 ifree(envvar);
2281 }
2282
2283 static void
2284 addtt(starttime, type)
2285 const zic_t starttime;
2286 int type;
2287 {
2288 if (starttime <= min_time ||
2289 (timecnt == 1 && attypes[0].at < min_time)) {
2290 gmtoffs[0] = gmtoffs[type];
2291 isdsts[0] = isdsts[type];
2292 ttisstds[0] = ttisstds[type];
2293 ttisgmts[0] = ttisgmts[type];
2294 if (abbrinds[type] != 0)
2295 (void) strcpy(chars, &chars[abbrinds[type]]);
2296 abbrinds[0] = 0;
2297 charcnt = strlen(chars) + 1;
2298 typecnt = 1;
2299 timecnt = 0;
2300 type = 0;
2301 }
2302 if (timecnt >= TZ_MAX_TIMES) {
2303 error(_("too many transitions?!"));
2304 exit(EXIT_FAILURE);
2305 }
2306 attypes[timecnt].at = starttime;
2307 attypes[timecnt].type = type;
2308 ++timecnt;
2309 }
2310
2311 static int
2312 addtype(gmtoff, abbr, isdst, ttisstd, ttisgmt)
2313 const long gmtoff;
2314 const char * const abbr;
2315 const int isdst;
2316 const int ttisstd;
2317 const int ttisgmt;
2318 {
2319 register int i, j;
2320
2321 if (isdst != TRUE && isdst != FALSE) {
2322 error(_("internal error - addtype called with bad isdst"));
2323 exit(EXIT_FAILURE);
2324 }
2325 if (ttisstd != TRUE && ttisstd != FALSE) {
2326 error(_("internal error - addtype called with bad ttisstd"));
2327 exit(EXIT_FAILURE);
2328 }
2329 if (ttisgmt != TRUE && ttisgmt != FALSE) {
2330 error(_("internal error - addtype called with bad ttisgmt"));
2331 exit(EXIT_FAILURE);
2332 }
2333 /*
2334 ** See if there's already an entry for this zone type.
2335 ** If so, just return its index.
2336 */
2337 for (i = 0; i < typecnt; ++i) {
2338 if (gmtoff == gmtoffs[i] && isdst == isdsts[i] &&
2339 strcmp(abbr, &chars[abbrinds[i]]) == 0 &&
2340 ttisstd == ttisstds[i] &&
2341 ttisgmt == ttisgmts[i])
2342 return i;
2343 }
2344 /*
2345 ** There isn't one; add a new one, unless there are already too
2346 ** many.
2347 */
2348 if (typecnt >= TZ_MAX_TYPES) {
2349 error(_("too many local time types"));
2350 exit(EXIT_FAILURE);
2351 }
2352 if (! (-1L - 2147483647L <= gmtoff && gmtoff <= 2147483647L)) {
2353 error(_("UTC offset out of range"));
2354 exit(EXIT_FAILURE);
2355 }
2356 gmtoffs[i] = gmtoff;
2357 isdsts[i] = isdst;
2358 ttisstds[i] = ttisstd;
2359 ttisgmts[i] = ttisgmt;
2360
2361 for (j = 0; j < charcnt; ++j)
2362 if (strcmp(&chars[j], abbr) == 0)
2363 break;
2364 if (j == charcnt)
2365 newabbr(abbr);
2366 abbrinds[i] = j;
2367 ++typecnt;
2368 return i;
2369 }
2370
2371 static void
2372 leapadd(t, positive, rolling, count)
2373 const zic_t t;
2374 const int positive;
2375 const int rolling;
2376 int count;
2377 {
2378 register int i, j;
2379
2380 if (leapcnt + (positive ? count : 1) > TZ_MAX_LEAPS) {
2381 error(_("too many leap seconds"));
2382 exit(EXIT_FAILURE);
2383 }
2384 for (i = 0; i < leapcnt; ++i)
2385 if (t <= trans[i]) {
2386 if (t == trans[i]) {
2387 error(_("repeated leap second moment"));
2388 exit(EXIT_FAILURE);
2389 }
2390 break;
2391 }
2392 do {
2393 for (j = leapcnt; j > i; --j) {
2394 trans[j] = trans[j - 1];
2395 corr[j] = corr[j - 1];
2396 roll[j] = roll[j - 1];
2397 }
2398 trans[i] = t;
2399 corr[i] = positive ? 1L : eitol(-count);
2400 roll[i] = rolling;
2401 ++leapcnt;
2402 } while (positive && --count != 0);
2403 }
2404
2405 static void
2406 adjleap(void)
2407 {
2408 register int i;
2409 register long last = 0;
2410
2411 /*
2412 ** propagate leap seconds forward
2413 */
2414 for (i = 0; i < leapcnt; ++i) {
2415 trans[i] = tadd(trans[i], last);
2416 last = corr[i] += last;
2417 }
2418 }
2419
2420 static int
2421 yearistype(year, type)
2422 const int year;
2423 const char * const type;
2424 {
2425 static char * buf;
2426 int result;
2427
2428 if (type == NULL || *type == '\0')
2429 return TRUE;
2430 buf = erealloc(buf, (int) (132 + strlen(yitcommand) + strlen(type)));
2431 (void)sprintf(buf, "%s %d %s", yitcommand, year, type); /* XXX: sprintf is safe */
2432 result = system(buf);
2433 if (WIFEXITED(result)) switch (WEXITSTATUS(result)) {
2434 case 0:
2435 return TRUE;
2436 case 1:
2437 return FALSE;
2438 }
2439 error(_("Wild result from command execution"));
2440 (void) fprintf(stderr, _("%s: command was '%s', result was %d\n"),
2441 progname, buf, result);
2442 for ( ; ; )
2443 exit(EXIT_FAILURE);
2444 }
2445
2446 static int
2447 lowerit(a)
2448 int a;
2449 {
2450 a = (unsigned char) a;
2451 return (isascii(a) && isupper(a)) ? tolower(a) : a;
2452 }
2453
2454 static int
2455 ciequal(ap, bp) /* case-insensitive equality */
2456 register const char * ap;
2457 register const char * bp;
2458 {
2459 while (lowerit(*ap) == lowerit(*bp++))
2460 if (*ap++ == '\0')
2461 return TRUE;
2462 return FALSE;
2463 }
2464
2465 static int
2466 itsabbr(abbr, word)
2467 register const char * abbr;
2468 register const char * word;
2469 {
2470 if (lowerit(*abbr) != lowerit(*word))
2471 return FALSE;
2472 ++word;
2473 while (*++abbr != '\0')
2474 do {
2475 if (*word == '\0')
2476 return FALSE;
2477 } while (lowerit(*word++) != lowerit(*abbr));
2478 return TRUE;
2479 }
2480
2481 static const struct lookup *
2482 byword(word, table)
2483 register const char * const word;
2484 register const struct lookup * const table;
2485 {
2486 register const struct lookup * foundlp;
2487 register const struct lookup * lp;
2488
2489 if (word == NULL || table == NULL)
2490 return NULL;
2491 /*
2492 ** Look for exact match.
2493 */
2494 for (lp = table; lp->l_word != NULL; ++lp)
2495 if (ciequal(word, lp->l_word))
2496 return lp;
2497 /*
2498 ** Look for inexact match.
2499 */
2500 foundlp = NULL;
2501 for (lp = table; lp->l_word != NULL; ++lp)
2502 if (itsabbr(word, lp->l_word)) {
2503 if (foundlp == NULL)
2504 foundlp = lp;
2505 else return NULL; /* multiple inexact matches */
2506 }
2507 return foundlp;
2508 }
2509
2510 static char **
2511 getfields(cp)
2512 register char * cp;
2513 {
2514 register char * dp;
2515 register char ** array;
2516 register int nsubs;
2517
2518 if (cp == NULL)
2519 return NULL;
2520 array = (char **) (void *)
2521 emalloc((int) ((strlen(cp) + 1) * sizeof *array));
2522 nsubs = 0;
2523 for ( ; ; ) {
2524 while (isascii((unsigned char) *cp) &&
2525 isspace((unsigned char) *cp))
2526 ++cp;
2527 if (*cp == '\0' || *cp == '#')
2528 break;
2529 array[nsubs++] = dp = cp;
2530 do {
2531 if ((*dp = *cp++) != '"')
2532 ++dp;
2533 else while ((*dp = *cp++) != '"')
2534 if (*dp != '\0')
2535 ++dp;
2536 else {
2537 error(_(
2538 "Odd number of quotation marks"
2539 ));
2540 exit(1);
2541 }
2542 } while (*cp != '\0' && *cp != '#' &&
2543 (!isascii(*cp) || !isspace((unsigned char) *cp)));
2544 if (isascii(*cp) && isspace((unsigned char) *cp))
2545 ++cp;
2546 *dp = '\0';
2547 }
2548 array[nsubs] = NULL;
2549 return array;
2550 }
2551
2552 static long
2553 oadd(t1, t2)
2554 const long t1;
2555 const long t2;
2556 {
2557 register long t;
2558
2559 t = t1 + t2;
2560 if ((t2 > 0 && t <= t1) || (t2 < 0 && t >= t1)) {
2561 error(_("time overflow"));
2562 exit(EXIT_FAILURE);
2563 }
2564 return t;
2565 }
2566
2567 static zic_t
2568 tadd(t1, t2)
2569 const zic_t t1;
2570 const long t2;
2571 {
2572 register zic_t t;
2573
2574 if (t1 == max_time && t2 > 0)
2575 return max_time;
2576 if (t1 == min_time && t2 < 0)
2577 return min_time;
2578 t = t1 + t2;
2579 if ((t2 > 0 && t <= t1) || (t2 < 0 && t >= t1)) {
2580 error(_("time overflow"));
2581 exit(EXIT_FAILURE);
2582 }
2583 return t;
2584 }
2585
2586 /*
2587 ** Given a rule, and a year, compute the date - in seconds since January 1,
2588 ** 1970, 00:00 LOCAL time - in that year that the rule refers to.
2589 */
2590
2591 static zic_t
2592 rpytime(rp, wantedy)
2593 register const struct rule * const rp;
2594 register const int wantedy;
2595 {
2596 register int y, m, i;
2597 register long dayoff; /* with a nod to Margaret O. */
2598 register zic_t t;
2599
2600 if (wantedy == INT_MIN)
2601 return min_time;
2602 if (wantedy == INT_MAX)
2603 return max_time;
2604 dayoff = 0;
2605 m = TM_JANUARY;
2606 y = EPOCH_YEAR;
2607 while (wantedy != y) {
2608 if (wantedy > y) {
2609 i = len_years[isleap(y)];
2610 ++y;
2611 } else {
2612 --y;
2613 i = -len_years[isleap(y)];
2614 }
2615 dayoff = oadd(dayoff, eitol(i));
2616 }
2617 while (m != rp->r_month) {
2618 i = len_months[isleap(y)][m];
2619 dayoff = oadd(dayoff, eitol(i));
2620 ++m;
2621 }
2622 i = rp->r_dayofmonth;
2623 if (m == TM_FEBRUARY && i == 29 && !isleap(y)) {
2624 if (rp->r_dycode == DC_DOWLEQ)
2625 --i;
2626 else {
2627 error(_("use of 2/29 in non leap-year"));
2628 exit(EXIT_FAILURE);
2629 }
2630 }
2631 --i;
2632 dayoff = oadd(dayoff, eitol(i));
2633 if (rp->r_dycode == DC_DOWGEQ || rp->r_dycode == DC_DOWLEQ) {
2634 register long wday;
2635
2636 #define LDAYSPERWEEK ((long) DAYSPERWEEK)
2637 wday = eitol(EPOCH_WDAY);
2638 /*
2639 ** Don't trust mod of negative numbers.
2640 */
2641 if (dayoff >= 0)
2642 wday = (wday + dayoff) % LDAYSPERWEEK;
2643 else {
2644 wday -= ((-dayoff) % LDAYSPERWEEK);
2645 if (wday < 0)
2646 wday += LDAYSPERWEEK;
2647 }
2648 while (wday != eitol(rp->r_wday))
2649 if (rp->r_dycode == DC_DOWGEQ) {
2650 dayoff = oadd(dayoff, (long) 1);
2651 if (++wday >= LDAYSPERWEEK)
2652 wday = 0;
2653 ++i;
2654 } else {
2655 dayoff = oadd(dayoff, (long) -1);
2656 if (--wday < 0)
2657 wday = LDAYSPERWEEK - 1;
2658 --i;
2659 }
2660 if (i < 0 || i >= len_months[isleap(y)][m]) {
2661 if (noise)
2662 warning(_("rule goes past start/end of month--\
2663 will not work with pre-2004 versions of zic"));
2664 }
2665 }
2666 if (dayoff < min_time / SECSPERDAY)
2667 return min_time;
2668 if (dayoff > max_time / SECSPERDAY)
2669 return max_time;
2670 t = (zic_t) dayoff * SECSPERDAY;
2671 return tadd(t, rp->r_tod);
2672 }
2673
2674 static void
2675 newabbr(string)
2676 const char * const string;
2677 {
2678 register int i;
2679
2680 if (strcmp(string, GRANDPARENTED) != 0) {
2681 register const char * cp;
2682 register char * wp;
2683
2684 /*
2685 ** Want one to ZIC_MAX_ABBR_LEN_WO_WARN alphabetics
2686 ** optionally followed by a + or - and a number from 1 to 14.
2687 */
2688 cp = string;
2689 wp = NULL;
2690 while (isascii((unsigned char) *cp) &&
2691 isalpha((unsigned char) *cp))
2692 ++cp;
2693 if (cp - string == 0)
2694 wp = _("time zone abbreviation lacks alphabetic at start");
2695 if (noise && cp - string > 3)
2696 wp = _("time zone abbreviation has more than 3 alphabetics");
2697 if (cp - string > ZIC_MAX_ABBR_LEN_WO_WARN)
2698 wp = _("time zone abbreviation has too many alphabetics");
2699 if (wp == NULL && (*cp == '+' || *cp == '-')) {
2700 ++cp;
2701 if (isascii((unsigned char) *cp) &&
2702 isdigit((unsigned char) *cp))
2703 if (*cp++ == '1' &&
2704 *cp >= '0' && *cp <= '4')
2705 ++cp;
2706 }
2707 if (*cp != '\0')
2708 wp = _("time zone abbreviation differs from POSIX standard");
2709 if (wp != NULL) {
2710 wp = ecpyalloc(wp);
2711 wp = ecatalloc(wp, " (");
2712 wp = ecatalloc(wp, string);
2713 wp = ecatalloc(wp, ")");
2714 warning(wp);
2715 ifree(wp);
2716 }
2717 }
2718 i = strlen(string) + 1;
2719 if (charcnt + i > TZ_MAX_CHARS) {
2720 error(_("too many, or too long, time zone abbreviations"));
2721 exit(EXIT_FAILURE);
2722 }
2723 (void)strncpy(&chars[charcnt], string, sizeof(chars) - charcnt - 1);
2724 charcnt += eitol(i);
2725 }
2726
2727 static int
2728 mkdirs(argname)
2729 char * argname;
2730 {
2731 register char * name;
2732 register char * cp;
2733
2734 if (argname == NULL || *argname == '\0')
2735 return 0;
2736 cp = name = ecpyalloc(argname);
2737 while ((cp = strchr(cp + 1, '/')) != 0) {
2738 *cp = '\0';
2739 #ifndef __NetBSD__
2740 /*
2741 ** DOS drive specifier?
2742 */
2743 if (isalpha((unsigned char) name[0]) &&
2744 name[1] == ':' && name[2] == '\0') {
2745 *cp = '/';
2746 continue;
2747 }
2748 #endif /* !defined __NetBSD__ */
2749 if (!itsdir(name)) {
2750 /*
2751 ** It doesn't seem to exist, so we try to create it.
2752 ** Creation may fail because of the directory being
2753 ** created by some other multiprocessor, so we get
2754 ** to do extra checking.
2755 */
2756 if (mkdir(name, MKDIR_UMASK) != 0) {
2757 const char *e = strerror(errno);
2758
2759 if (errno != EEXIST || !itsdir(name)) {
2760 (void) fprintf(stderr,
2761 _("%s: Can't create directory %s: %s\n"),
2762 progname, name, e);
2763 ifree(name);
2764 return -1;
2765 }
2766 }
2767 }
2768 *cp = '/';
2769 }
2770 ifree(name);
2771 return 0;
2772 }
2773
2774 static long
2775 eitol(i)
2776 const int i;
2777 {
2778 long l;
2779
2780 l = i;
2781 if ((i < 0 && l >= 0) || (i == 0 && l != 0) || (i > 0 && l <= 0)) {
2782 (void) fprintf(stderr,
2783 _("%s: %d did not sign extend correctly\n"),
2784 progname, i);
2785 exit(EXIT_FAILURE);
2786 }
2787 return l;
2788 }
2789
2790 /*
2791 ** UNIX was a registered trademark of The Open Group in 2003.
2792 */
MINIX 3 (repo.or.cz mirror)