?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Mon Oct 7 14:51:52 1996 Thomas Bushnell, n/BSG <thomas@gnu.ai.mit.edu>
[glibc/history.git] / time / zic.c
bloba354a1ece399f5a531f21518cae63b4b7c9251f7
1 #ifndef lint
2 #ifndef NOID
3 static char elsieid[] = "@(#)zic.c 7.78";
4 #endif /* !defined NOID */
5 #endif /* !defined lint */
6
7 #include "private.h"
8 #include "locale.h"
9 #include "tzfile.h"
10 #ifdef unix
11 #include "sys/stat.h" /* for umask manifest constants */
12 #endif /* defined unix */
13
14 /*
15 ** On some ancient hosts, predicates like `isspace(C)' are defined
16 ** only if isascii(C) || C == EOF. Modern hosts obey the C Standard,
17 ** which says they are defined only if C == ((unsigned char) C) || C == EOF.
18 ** Neither the C Standard nor Posix require that `isascii' exist.
19 ** For portability, we check both ancient and modern requirements.
20 ** If isascii is not defined, the isascii check succeeds trivially.
21 */
22 #include "ctype.h"
23 #ifndef isascii
24 #define isascii(x) 1
25 #endif
26
27 struct rule {
28 const char * r_filename;
29 int r_linenum;
30 const char * r_name;
31
32 int r_loyear; /* for example, 1986 */
33 int r_hiyear; /* for example, 1986 */
34 const char * r_yrtype;
35
36 int r_month; /* 0..11 */
37
38 int r_dycode; /* see below */
39 int r_dayofmonth;
40 int r_wday;
41
42 long r_tod; /* time from midnight */
43 int r_todisstd; /* above is standard time if TRUE */
44 /* or wall clock time if FALSE */
45 int r_todisgmt; /* above is GMT if TRUE */
46 /* or local time if FALSE */
47 long r_stdoff; /* offset from standard time */
48 const char * r_abbrvar; /* variable part of abbreviation */
49
50 int r_todo; /* a rule to do (used in outzone) */
51 time_t r_temp; /* used in outzone */
52 };
53
54 /*
55 ** r_dycode r_dayofmonth r_wday
56 */
57
58 #define DC_DOM 0 /* 1..31 */ /* unused */
59 #define DC_DOWGEQ 1 /* 1..31 */ /* 0..6 (Sun..Sat) */
60 #define DC_DOWLEQ 2 /* 1..31 */ /* 0..6 (Sun..Sat) */
61
62 struct zone {
63 const char * z_filename;
64 int z_linenum;
65
66 const char * z_name;
67 long z_gmtoff;
68 const char * z_rule;
69 const char * z_format;
70
71 long z_stdoff;
72
73 struct rule * z_rules;
74 int z_nrules;
75
76 struct rule z_untilrule;
77 time_t z_untiltime;
78 };
79
80 extern int getopt P((int argc, char * const argv[],
81 const char * options));
82 extern char * icatalloc P((char * old, const char * new));
83 extern char * icpyalloc P((const char * string));
84 extern void ifree P((char * p));
85 extern char * imalloc P((int n));
86 extern void * irealloc P((void * old, int n));
87 extern int link P((const char * fromname, const char * toname));
88 extern char * optarg;
89 extern int optind;
90 extern char * scheck P((const char * string, const char * format));
91
92 static void addtt P((time_t starttime, int type));
93 static int addtype P((long gmtoff, const char * abbr, int isdst,
94 int ttisstd, int ttisgmt));
95 static void leapadd P((time_t t, int positive, int rolling, int count));
96 static void adjleap P((void));
97 static void associate P((void));
98 static int ciequal P((const char * ap, const char * bp));
99 static void convert P((long val, char * buf));
100 static void dolink P((const char * fromfile, const char * tofile));
101 static void doabbr P((char * abbr, const char * format,
102 const char * letters, int isdst));
103 static void eat P((const char * name, int num));
104 static void eats P((const char * name, int num,
105 const char * rname, int rnum));
106 static long eitol P((int i));
107 static void error P((const char * message));
108 static char ** getfields P((char * buf));
109 static long gethms P((const char * string, const char * errstrng,
110 int signable));
111 static void infile P((const char * filename));
112 static void inleap P((char ** fields, int nfields));
113 static void inlink P((char ** fields, int nfields));
114 static void inrule P((char ** fields, int nfields));
115 static int inzcont P((char ** fields, int nfields));
116 static int inzone P((char ** fields, int nfields));
117 static int inzsub P((char ** fields, int nfields, int iscont));
118 static int itsabbr P((const char * abbr, const char * word));
119 static int itsdir P((const char * name));
120 static int lowerit P((int c));
121 static char * memcheck P((char * tocheck));
122 static int mkdirs P((char * filename));
123 static void newabbr P((const char * abbr));
124 static long oadd P((long t1, long t2));
125 static void outzone P((const struct zone * zp, int ntzones));
126 static void puttzcode P((long code, FILE * fp));
127 static int rcomp P((const void * leftp, const void * rightp));
128 static time_t rpytime P((const struct rule * rp, int wantedy));
129 static void rulesub P((struct rule * rp,
130 const char * loyearp, const char * hiyearp,
131 const char * typep, const char * monthp,
132 const char * dayp, const char * timep));
133 static void setboundaries P((void));
134 static time_t tadd P((time_t t1, long t2));
135 static void usage P((void));
136 static void writezone P((const char * name));
137 static int yearistype P((int year, const char * type));
138
139 #if !(HAVE_STRERROR - 0)
140 static char * strerror P((int));
141 #endif /* !(HAVE_STRERROR - 0) */
142
143 static int charcnt;
144 static int errors;
145 static const char * filename;
146 static int leapcnt;
147 static int linenum;
148 static time_t max_time;
149 static int max_year;
150 static time_t min_time;
151 static int min_year;
152 static int noise;
153 static const char * rfilename;
154 static int rlinenum;
155 static const char * progname;
156 static int timecnt;
157 static int typecnt;
158
159 /*
160 ** Line codes.
161 */
162
163 #define LC_RULE 0
164 #define LC_ZONE 1
165 #define LC_LINK 2
166 #define LC_LEAP 3
167
168 /*
169 ** Which fields are which on a Zone line.
170 */
171
172 #define ZF_NAME 1
173 #define ZF_GMTOFF 2
174 #define ZF_RULE 3
175 #define ZF_FORMAT 4
176 #define ZF_TILYEAR 5
177 #define ZF_TILMONTH 6
178 #define ZF_TILDAY 7
179 #define ZF_TILTIME 8
180 #define ZONE_MINFIELDS 5
181 #define ZONE_MAXFIELDS 9
182
183 /*
184 ** Which fields are which on a Zone continuation line.
185 */
186
187 #define ZFC_GMTOFF 0
188 #define ZFC_RULE 1
189 #define ZFC_FORMAT 2
190 #define ZFC_TILYEAR 3
191 #define ZFC_TILMONTH 4
192 #define ZFC_TILDAY 5
193 #define ZFC_TILTIME 6
194 #define ZONEC_MINFIELDS 3
195 #define ZONEC_MAXFIELDS 7
196
197 /*
198 ** Which files are which on a Rule line.
199 */
200
201 #define RF_NAME 1
202 #define RF_LOYEAR 2
203 #define RF_HIYEAR 3
204 #define RF_COMMAND 4
205 #define RF_MONTH 5
206 #define RF_DAY 6
207 #define RF_TOD 7
208 #define RF_STDOFF 8
209 #define RF_ABBRVAR 9
210 #define RULE_FIELDS 10
211
212 /*
213 ** Which fields are which on a Link line.
214 */
215
216 #define LF_FROM 1
217 #define LF_TO 2
218 #define LINK_FIELDS 3
219
220 /*
221 ** Which fields are which on a Leap line.
222 */
223
224 #define LP_YEAR 1
225 #define LP_MONTH 2
226 #define LP_DAY 3
227 #define LP_TIME 4
228 #define LP_CORR 5
229 #define LP_ROLL 6
230 #define LEAP_FIELDS 7
231
232 /*
233 ** Year synonyms.
234 */
235
236 #define YR_MINIMUM 0
237 #define YR_MAXIMUM 1
238 #define YR_ONLY 2
239
240 static struct rule * rules;
241 static int nrules; /* number of rules */
242
243 static struct zone * zones;
244 static int nzones; /* number of zones */
245
246 struct link {
247 const char * l_filename;
248 int l_linenum;
249 const char * l_from;
250 const char * l_to;
251 };
252
253 static struct link * links;
254 static int nlinks;
255
256 struct lookup {
257 const char * l_word;
258 const int l_value;
259 };
260
261 static struct lookup const * byword P((const char * string,
262 const struct lookup * lp));
263
264 static struct lookup const line_codes[] = {
265 { "Rule", LC_RULE },
266 { "Zone", LC_ZONE },
267 { "Link", LC_LINK },
268 { "Leap", LC_LEAP },
269 { NULL, 0}
270 };
271
272 static struct lookup const mon_names[] = {
273 { "January", TM_JANUARY },
274 { "February", TM_FEBRUARY },
275 { "March", TM_MARCH },
276 { "April", TM_APRIL },
277 { "May", TM_MAY },
278 { "June", TM_JUNE },
279 { "July", TM_JULY },
280 { "August", TM_AUGUST },
281 { "September", TM_SEPTEMBER },
282 { "October", TM_OCTOBER },
283 { "November", TM_NOVEMBER },
284 { "December", TM_DECEMBER },
285 { NULL, 0 }
286 };
287
288 static struct lookup const wday_names[] = {
289 { "Sunday", TM_SUNDAY },
290 { "Monday", TM_MONDAY },
291 { "Tuesday", TM_TUESDAY },
292 { "Wednesday", TM_WEDNESDAY },
293 { "Thursday", TM_THURSDAY },
294 { "Friday", TM_FRIDAY },
295 { "Saturday", TM_SATURDAY },
296 { NULL, 0 }
297 };
298
299 static struct lookup const lasts[] = {
300 { "last-Sunday", TM_SUNDAY },
301 { "last-Monday", TM_MONDAY },
302 { "last-Tuesday", TM_TUESDAY },
303 { "last-Wednesday", TM_WEDNESDAY },
304 { "last-Thursday", TM_THURSDAY },
305 { "last-Friday", TM_FRIDAY },
306 { "last-Saturday", TM_SATURDAY },
307 { NULL, 0 }
308 };
309
310 static struct lookup const begin_years[] = {
311 { "minimum", YR_MINIMUM },
312 { "maximum", YR_MAXIMUM },
313 { NULL, 0 }
314 };
315
316 static struct lookup const end_years[] = {
317 { "minimum", YR_MINIMUM },
318 { "maximum", YR_MAXIMUM },
319 { "only", YR_ONLY },
320 { NULL, 0 }
321 };
322
323 static struct lookup const leap_types[] = {
324 { "Rolling", TRUE },
325 { "Stationary", FALSE },
326 { NULL, 0 }
327 };
328
329 static const int len_months[2][MONSPERYEAR] = {
330 { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 },
331 { 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }
332 };
333
334 static const int len_years[2] = {
335 DAYSPERNYEAR, DAYSPERLYEAR
336 };
337
338 static struct attype {
339 time_t at;
340 unsigned char type;
341 } attypes[TZ_MAX_TIMES];
342 static long gmtoffs[TZ_MAX_TYPES];
343 static char isdsts[TZ_MAX_TYPES];
344 static unsigned char abbrinds[TZ_MAX_TYPES];
345 static char ttisstds[TZ_MAX_TYPES];
346 static char ttisgmts[TZ_MAX_TYPES];
347 static char chars[TZ_MAX_CHARS];
348 static time_t trans[TZ_MAX_LEAPS];
349 static long corr[TZ_MAX_LEAPS];
350 static char roll[TZ_MAX_LEAPS];
351
352 /*
353 ** Memory allocation.
354 */
355
356 static char *
357 memcheck(ptr)
358 char * const ptr;
359 {
360 if (ptr == NULL) {
361 const char *e = strerror(errno);
362 (void) fprintf(stderr, _("%s: Memory exhausted: %s\n"),
363 progname, e);
364 (void) exit(EXIT_FAILURE);
365 }
366 return ptr;
367 }
368
369 #define emalloc(size) memcheck(imalloc(size))
370 #define erealloc(ptr, size) memcheck(irealloc((ptr), (size)))
371 #define ecpyalloc(ptr) memcheck(icpyalloc(ptr))
372 #define ecatalloc(oldp, newp) memcheck(icatalloc((oldp), (newp)))
373
374 /*
375 ** Error handling.
376 */
377
378 #if !(HAVE_STRERROR - 0)
379 static char *
380 strerror(errnum)
381 int errnum;
382 {
383 extern char * sys_errlist[];
384 extern int sys_nerr;
385
386 return (errnum > 0 && errnum <= sys_nerr) ?
387 sys_errlist[errnum] : "Unknown system error";
388 }
389 #endif /* !(HAVE_STRERROR - 0) */
390
391 static void
392 eats(name, num, rname, rnum)
393 const char * const name;
394 const int num;
395 const char * const rname;
396 const int rnum;
397 {
398 filename = name;
399 linenum = num;
400 rfilename = rname;
401 rlinenum = rnum;
402 }
403
404 static void
405 eat(name, num)
406 const char * const name;
407 const int num;
408 {
409 eats(name, num, (char *) NULL, -1);
410 }
411
412 static void
413 error(string)
414 const char * const string;
415 {
416 /*
417 ** Match the format of "cc" to allow sh users to
418 ** zic ... 2>&1 | error -t "*" -v
419 ** on BSD systems.
420 */
421 (void) fprintf(stderr, _("\"%s\", line %d: %s"),
422 filename, linenum, string);
423 if (rfilename != NULL)
424 (void) fprintf(stderr, _(" (rule from \"%s\", line %d)"),
425 rfilename, rlinenum);
426 (void) fprintf(stderr, "\n");
427 ++errors;
428 }
429
430 static void
431 warning(string)
432 const char * const string;
433 {
434 char * cp;
435
436 cp = ecpyalloc("warning: ");
437 cp = ecatalloc(cp, string);
438 error(string);
439 ifree(cp);
440 --errors;
441 }
442
443 static void
444 usage P((void))
445 {
446 (void) fprintf(stderr, _("%s: usage is %s [ -s ] [ -v ] [ -l localtime ] [ -p posixrules ] [ -d directory ]\n\t[ -L leapseconds ] [ -y yearistype ] [ filename ... ]\n"),
447 progname, progname);
448 (void) exit(EXIT_FAILURE);
449 }
450
451 static const char * psxrules;
452 static const char * lcltime;
453 static const char * directory;
454 static const char * leapsec;
455 static const char * yitcommand;
456 static int sflag = FALSE;
457
458 int
459 main(argc, argv)
460 int argc;
461 char * argv[];
462 {
463 register int i;
464 register int j;
465 register int c;
466
467 #ifdef unix
468 (void) umask(umask(S_IWGRP | S_IWOTH) | (S_IWGRP | S_IWOTH));
469 #endif /* defined unix */
470 #if HAVE_GETTEXT - 0
471 (void) setlocale(LC_MESSAGES, "");
472 #ifdef TZ_DOMAINDIR
473 (void) bindtextdomain(TZ_DOMAIN, TZ_DOMAINDIR);
474 #endif /* defined TEXTDOMAINDIR */
475 (void) textdomain(TZ_DOMAIN);
476 #endif /* HAVE_GETTEXT - 0 */
477 progname = argv[0];
478 while ((c = getopt(argc, argv, "d:l:p:L:vsy:")) != EOF)
479 switch (c) {
480 default:
481 usage();
482 case 'd':
483 if (directory == NULL)
484 directory = optarg;
485 else {
486 (void) fprintf(stderr,
487 _("%s: More than one -d option specified\n"),
488 progname);
489 (void) exit(EXIT_FAILURE);
490 }
491 break;
492 case 'l':
493 if (lcltime == NULL)
494 lcltime = optarg;
495 else {
496 (void) fprintf(stderr,
497 _("%s: More than one -l option specified\n"),
498 progname);
499 (void) exit(EXIT_FAILURE);
500 }
501 break;
502 case 'p':
503 if (psxrules == NULL)
504 psxrules = optarg;
505 else {
506 (void) fprintf(stderr,
507 _("%s: More than one -p option specified\n"),
508 progname);
509 (void) exit(EXIT_FAILURE);
510 }
511 break;
512 case 'y':
513 if (yitcommand == NULL)
514 yitcommand = optarg;
515 else {
516 (void) fprintf(stderr,
517 _("%s: More than one -y option specified\n"),
518 progname);
519 (void) exit(EXIT_FAILURE);
520 }
521 break;
522 case 'L':
523 if (leapsec == NULL)
524 leapsec = optarg;
525 else {
526 (void) fprintf(stderr,
527 _("%s: More than one -L option specified\n"),
528 progname);
529 (void) exit(EXIT_FAILURE);
530 }
531 break;
532 case 'v':
533 noise = TRUE;
534 break;
535 case 's':
536 sflag = TRUE;
537 break;
538 }
539 if (optind == argc - 1 && strcmp(argv[optind], "=") == 0)
540 usage(); /* usage message by request */
541 if (directory == NULL)
542 directory = TZDIR;
543 if (yitcommand == NULL)
544 yitcommand = "yearistype";
545
546 setboundaries();
547
548 if (optind < argc && leapsec != NULL) {
549 infile(leapsec);
550 adjleap();
551 }
552
553 for (i = optind; i < argc; ++i)
554 infile(argv[i]);
555 if (errors)
556 (void) exit(EXIT_FAILURE);
557 associate();
558 for (i = 0; i < nzones; i = j) {
559 /*
560 ** Find the next non-continuation zone entry.
561 */
562 for (j = i + 1; j < nzones && zones[j].z_name == NULL; ++j)
563 continue;
564 outzone(&zones[i], j - i);
565 }
566 /*
567 ** Make links.
568 */
569 for (i = 0; i < nlinks; ++i)
570 dolink(links[i].l_from, links[i].l_to);
571 if (lcltime != NULL)
572 dolink(lcltime, TZDEFAULT);
573 if (psxrules != NULL)
574 dolink(psxrules, TZDEFRULES);
575 return (errors == 0) ? EXIT_SUCCESS : EXIT_FAILURE;
576 }
577
578 static void
579 dolink(fromfile, tofile)
580 const char * const fromfile;
581 const char * const tofile;
582 {
583 register char * fromname;
584 register char * toname;
585
586 if (fromfile[0] == '/')
587 fromname = ecpyalloc(fromfile);
588 else {
589 fromname = ecpyalloc(directory);
590 fromname = ecatalloc(fromname, "/");
591 fromname = ecatalloc(fromname, fromfile);
592 }
593 if (tofile[0] == '/')
594 toname = ecpyalloc(tofile);
595 else {
596 toname = ecpyalloc(directory);
597 toname = ecatalloc(toname, "/");
598 toname = ecatalloc(toname, tofile);
599 }
600 /*
601 ** We get to be careful here since
602 ** there's a fair chance of root running us.
603 */
604 if (!itsdir(toname))
605 (void) remove(toname);
606 if (link(fromname, toname) != 0) {
607 if (mkdirs(toname) != 0)
608 (void) exit(EXIT_FAILURE);
609 if (link(fromname, toname) != 0) {
610 const char *e = strerror(errno);
611 (void) fprintf(stderr,
612 _("%s: Can't link from %s to %s: %s\n"),
613 progname, fromname, toname, e);
614 (void) exit(EXIT_FAILURE);
615 }
616 }
617 ifree(fromname);
618 ifree(toname);
619 }
620
621 #ifndef INT_MAX
622 #define INT_MAX ((int) (((unsigned)~0)>>1))
623 #endif /* !defined INT_MAX */
624
625 #ifndef INT_MIN
626 #define INT_MIN ((int) ~(((unsigned)~0)>>1))
627 #endif /* !defined INT_MIN */
628
629 /*
630 ** The tz file format currently allows at most 32-bit quantities.
631 ** This restriction should be removed before signed 32-bit values
632 ** wrap around in 2038, but unfortunately this will require a
633 ** change to the tz file format.
634 */
635
636 #define MAX_BITS_IN_FILE 32
637 #define TIME_T_BITS_IN_FILE ((TYPE_BIT(time_t) < MAX_BITS_IN_FILE) ? TYPE_BIT(time_t) : MAX_BITS_IN_FILE)
638
639 static void
640 setboundaries P((void))
641 {
642 if (TYPE_SIGNED(time_t)) {
643 min_time = ~ (time_t) 0;
644 min_time <<= TIME_T_BITS_IN_FILE - 1;
645 max_time = ~ (time_t) 0 - min_time;
646 if (sflag)
647 min_time = 0;
648 } else {
649 min_time = 0;
650 max_time = 2 - sflag;
651 max_time <<= TIME_T_BITS_IN_FILE - 1;
652 --max_time;
653 }
654 min_year = TM_YEAR_BASE + gmtime(&min_time)->tm_year;
655 max_year = TM_YEAR_BASE + gmtime(&max_time)->tm_year;
656 }
657
658 static int
659 itsdir(name)
660 const char * const name;
661 {
662 register char * myname;
663 register int accres;
664
665 myname = ecpyalloc(name);
666 myname = ecatalloc(myname, "/.");
667 accres = access(myname, F_OK);
668 ifree(myname);
669 return accres == 0;
670 }
671
672 /*
673 ** Associate sets of rules with zones.
674 */
675
676 /*
677 ** Sort by rule name.
678 */
679
680 static int
681 rcomp(cp1, cp2)
682 const void * cp1;
683 const void * cp2;
684 {
685 return strcmp(((const struct rule *) cp1)->r_name,
686 ((const struct rule *) cp2)->r_name);
687 }
688
689 static void
690 associate P((void))
691 {
692 register struct zone * zp;
693 register struct rule * rp;
694 register int base, out;
695 register int i, j;
696
697 if (nrules != 0) {
698 (void) qsort((void *) rules, (size_t) nrules,
699 (size_t) sizeof *rules, rcomp);
700 for (i = 0; i < nrules - 1; ++i) {
701 if (strcmp(rules[i].r_name,
702 rules[i + 1].r_name) != 0)
703 continue;
704 if (strcmp(rules[i].r_filename,
705 rules[i + 1].r_filename) == 0)
706 continue;
707 eat(rules[i].r_filename, rules[i].r_linenum);
708 warning(_("same rule name in multiple files"));
709 eat(rules[i + 1].r_filename, rules[i + 1].r_linenum);
710 warning(_("same rule name in multiple files"));
711 for (j = i + 2; j < nrules; ++j) {
712 if (strcmp(rules[i].r_name,
713 rules[j].r_name) != 0)
714 break;
715 if (strcmp(rules[i].r_filename,
716 rules[j].r_filename) == 0)
717 continue;
718 if (strcmp(rules[i + 1].r_filename,
719 rules[j].r_filename) == 0)
720 continue;
721 break;
722 }
723 i = j - 1;
724 }
725 }
726 for (i = 0; i < nzones; ++i) {
727 zp = &zones[i];
728 zp->z_rules = NULL;
729 zp->z_nrules = 0;
730 }
731 for (base = 0; base < nrules; base = out) {
732 rp = &rules[base];
733 for (out = base + 1; out < nrules; ++out)
734 if (strcmp(rp->r_name, rules[out].r_name) != 0)
735 break;
736 for (i = 0; i < nzones; ++i) {
737 zp = &zones[i];
738 if (strcmp(zp->z_rule, rp->r_name) != 0)
739 continue;
740 zp->z_rules = rp;
741 zp->z_nrules = out - base;
742 }
743 }
744 for (i = 0; i < nzones; ++i) {
745 zp = &zones[i];
746 if (zp->z_nrules == 0) {
747 /*
748 ** Maybe we have a local standard time offset.
749 */
750 eat(zp->z_filename, zp->z_linenum);
751 zp->z_stdoff = gethms(zp->z_rule, _("unruly zone"),
752 TRUE);
753 /*
754 ** Note, though, that if there's no rule,
755 ** a '%s' in the format is a bad thing.
756 */
757 if (strchr(zp->z_format, '%') != 0)
758 error(_("%s in ruleless zone"));
759 }
760 }
761 if (errors)
762 (void) exit(EXIT_FAILURE);
763 }
764
765 static void
766 infile(name)
767 const char * name;
768 {
769 register FILE * fp;
770 register char ** fields;
771 register char * cp;
772 register const struct lookup * lp;
773 register int nfields;
774 register int wantcont;
775 register int num;
776 char buf[BUFSIZ];
777
778 if (strcmp(name, "-") == 0) {
779 name = _("standard input");
780 fp = stdin;
781 } else if ((fp = fopen(name, "r")) == NULL) {
782 const char *e = strerror(errno);
783 (void) fprintf(stderr, _("%s: Can't open %s: %s\n"),
784 progname, name, e);
785 (void) exit(EXIT_FAILURE);
786 }
787 wantcont = FALSE;
788 for (num = 1; ; ++num) {
789 eat(name, num);
790 if (fgets(buf, (int) sizeof buf, fp) != buf)
791 break;
792 cp = strchr(buf, '\n');
793 if (cp == NULL) {
794 error(_("line too long"));
795 (void) exit(EXIT_FAILURE);
796 }
797 *cp = '\0';
798 fields = getfields(buf);
799 nfields = 0;
800 while (fields[nfields] != NULL) {
801 static char nada;
802
803 if (strcmp(fields[nfields], "-") == 0)
804 fields[nfields] = &nada;
805 ++nfields;
806 }
807 if (nfields == 0) {
808 /* nothing to do */
809 } else if (wantcont) {
810 wantcont = inzcont(fields, nfields);
811 } else {
812 lp = byword(fields[0], line_codes);
813 if (lp == NULL)
814 error(_("input line of unknown type"));
815 else switch ((int) (lp->l_value)) {
816 case LC_RULE:
817 inrule(fields, nfields);
818 wantcont = FALSE;
819 break;
820 case LC_ZONE:
821 wantcont = inzone(fields, nfields);
822 break;
823 case LC_LINK:
824 inlink(fields, nfields);
825 wantcont = FALSE;
826 break;
827 case LC_LEAP:
828 if (name != leapsec)
829 (void) fprintf(stderr,
830 _("%s: Leap line in non leap seconds file %s\n"),
831 progname, name);
832 else inleap(fields, nfields);
833 wantcont = FALSE;
834 break;
835 default: /* "cannot happen" */
836 (void) fprintf(stderr,
837 _("%s: panic: Invalid l_value %d\n"),
838 progname, lp->l_value);
839 (void) exit(EXIT_FAILURE);
840 }
841 }
842 ifree((char *) fields);
843 }
844 if (ferror(fp)) {
845 (void) fprintf(stderr, _("%s: Error reading %s\n"),
846 progname, filename);
847 (void) exit(EXIT_FAILURE);
848 }
849 if (fp != stdin && fclose(fp)) {
850 const char *e = strerror(errno);
851 (void) fprintf(stderr, _("%s: Error closing %s: %s\n"),
852 progname, filename, e);
853 (void) exit(EXIT_FAILURE);
854 }
855 if (wantcont)
856 error(_("expected continuation line not found"));
857 }
858
859 /*
860 ** Convert a string of one of the forms
861 ** h -h hh:mm -hh:mm hh:mm:ss -hh:mm:ss
862 ** into a number of seconds.
863 ** A null string maps to zero.
864 ** Call error with errstring and return zero on errors.
865 */
866
867 static long
868 gethms(string, errstring, signable)
869 const char * string;
870 const char * const errstring;
871 const int signable;
872 {
873 int hh, mm, ss, sign;
874
875 if (string == NULL || *string == '\0')
876 return 0;
877 if (!signable)
878 sign = 1;
879 else if (*string == '-') {
880 sign = -1;
881 ++string;
882 } else sign = 1;
883 if (sscanf(string, scheck(string, "%d"), &hh) == 1)
884 mm = ss = 0;
885 else if (sscanf(string, scheck(string, "%d:%d"), &hh, &mm) == 2)
886 ss = 0;
887 else if (sscanf(string, scheck(string, "%d:%d:%d"),
888 &hh, &mm, &ss) != 3) {
889 error(errstring);
890 return 0;
891 }
892 if (hh < 0 || hh >= HOURSPERDAY ||
893 mm < 0 || mm >= MINSPERHOUR ||
894 ss < 0 || ss > SECSPERMIN) {
895 error(errstring);
896 return 0;
897 }
898 return eitol(sign) *
899 (eitol(hh * MINSPERHOUR + mm) *
900 eitol(SECSPERMIN) + eitol(ss));
901 }
902
903 static void
904 inrule(fields, nfields)
905 register char ** const fields;
906 const int nfields;
907 {
908 static struct rule r;
909
910 if (nfields != RULE_FIELDS) {
911 error(_("wrong number of fields on Rule line"));
912 return;
913 }
914 if (*fields[RF_NAME] == '\0') {
915 error(_("nameless rule"));
916 return;
917 }
918 r.r_filename = filename;
919 r.r_linenum = linenum;
920 r.r_stdoff = gethms(fields[RF_STDOFF], _("invalid saved time"), TRUE);
921 rulesub(&r, fields[RF_LOYEAR], fields[RF_HIYEAR], fields[RF_COMMAND],
922 fields[RF_MONTH], fields[RF_DAY], fields[RF_TOD]);
923 r.r_name = ecpyalloc(fields[RF_NAME]);
924 r.r_abbrvar = ecpyalloc(fields[RF_ABBRVAR]);
925 rules = (struct rule *) (void *) erealloc((char *) rules,
926 (int) ((nrules + 1) * sizeof *rules));
927 rules[nrules++] = r;
928 }
929
930 static int
931 inzone(fields, nfields)
932 register char ** const fields;
933 const int nfields;
934 {
935 register int i;
936 static char * buf;
937
938 if (nfields < ZONE_MINFIELDS || nfields > ZONE_MAXFIELDS) {
939 error(_("wrong number of fields on Zone line"));
940 return FALSE;
941 }
942 if (strcmp(fields[ZF_NAME], TZDEFAULT) == 0 && lcltime != NULL) {
943 buf = erealloc(buf, (int) (132 + strlen(TZDEFAULT)));
944 (void) sprintf(buf,
945 _("\"Zone %s\" line and -l option are mutually exclusive"),
946 TZDEFAULT);
947 error(buf);
948 return FALSE;
949 }
950 if (strcmp(fields[ZF_NAME], TZDEFRULES) == 0 && psxrules != NULL) {
951 buf = erealloc(buf, (int) (132 + strlen(TZDEFRULES)));
952 (void) sprintf(buf,
953 _("\"Zone %s\" line and -p option are mutually exclusive"),
954 TZDEFRULES);
955 error(buf);
956 return FALSE;
957 }
958 for (i = 0; i < nzones; ++i)
959 if (zones[i].z_name != NULL &&
960 strcmp(zones[i].z_name, fields[ZF_NAME]) == 0) {
961 buf = erealloc(buf, (int) (132 +
962 strlen(fields[ZF_NAME]) +
963 strlen(zones[i].z_filename)));
964 (void) sprintf(buf,
965 _("duplicate zone name %s (file \"%s\", line %d)"),
966 fields[ZF_NAME],
967 zones[i].z_filename,
968 zones[i].z_linenum);
969 error(buf);
970 return FALSE;
971 }
972 return inzsub(fields, nfields, FALSE);
973 }
974
975 static int
976 inzcont(fields, nfields)
977 register char ** const fields;
978 const int nfields;
979 {
980 if (nfields < ZONEC_MINFIELDS || nfields > ZONEC_MAXFIELDS) {
981 error(_("wrong number of fields on Zone continuation line"));
982 return FALSE;
983 }
984 return inzsub(fields, nfields, TRUE);
985 }
986
987 static int
988 inzsub(fields, nfields, iscont)
989 register char ** const fields;
990 const int nfields;
991 const int iscont;
992 {
993 register char * cp;
994 static struct zone z;
995 register int i_gmtoff, i_rule, i_format;
996 register int i_untilyear, i_untilmonth;
997 register int i_untilday, i_untiltime;
998 register int hasuntil;
999
1000 if (iscont) {
1001 i_gmtoff = ZFC_GMTOFF;
1002 i_rule = ZFC_RULE;
1003 i_format = ZFC_FORMAT;
1004 i_untilyear = ZFC_TILYEAR;
1005 i_untilmonth = ZFC_TILMONTH;
1006 i_untilday = ZFC_TILDAY;
1007 i_untiltime = ZFC_TILTIME;
1008 z.z_name = NULL;
1009 } else {
1010 i_gmtoff = ZF_GMTOFF;
1011 i_rule = ZF_RULE;
1012 i_format = ZF_FORMAT;
1013 i_untilyear = ZF_TILYEAR;
1014 i_untilmonth = ZF_TILMONTH;
1015 i_untilday = ZF_TILDAY;
1016 i_untiltime = ZF_TILTIME;
1017 z.z_name = ecpyalloc(fields[ZF_NAME]);
1018 }
1019 z.z_filename = filename;
1020 z.z_linenum = linenum;
1021 z.z_gmtoff = gethms(fields[i_gmtoff], _("invalid GMT offset"), TRUE);
1022 if ((cp = strchr(fields[i_format], '%')) != 0) {
1023 if (*++cp != 's' || strchr(cp, '%') != 0) {
1024 error(_("invalid abbreviation format"));
1025 return FALSE;
1026 }
1027 }
1028 z.z_rule = ecpyalloc(fields[i_rule]);
1029 z.z_format = ecpyalloc(fields[i_format]);
1030 hasuntil = nfields > i_untilyear;
1031 if (hasuntil) {
1032 z.z_untilrule.r_filename = filename;
1033 z.z_untilrule.r_linenum = linenum;
1034 rulesub(&z.z_untilrule,
1035 fields[i_untilyear],
1036 "only",
1037 "",
1038 (nfields > i_untilmonth) ?
1039 fields[i_untilmonth] : "Jan",
1040 (nfields > i_untilday) ? fields[i_untilday] : "1",
1041 (nfields > i_untiltime) ? fields[i_untiltime] : "0");
1042 z.z_untiltime = rpytime(&z.z_untilrule,
1043 z.z_untilrule.r_loyear);
1044 if (iscont && nzones > 0 &&
1045 z.z_untiltime > min_time &&
1046 z.z_untiltime < max_time &&
1047 zones[nzones - 1].z_untiltime > min_time &&
1048 zones[nzones - 1].z_untiltime < max_time &&
1049 zones[nzones - 1].z_untiltime >= z.z_untiltime) {
1050 error(_("Zone continuation line end time is not after end time of previous line"));
1051 return FALSE;
1052 }
1053 }
1054 zones = (struct zone *) (void *) erealloc((char *) zones,
1055 (int) ((nzones + 1) * sizeof *zones));
1056 zones[nzones++] = z;
1057 /*
1058 ** If there was an UNTIL field on this line,
1059 ** there's more information about the zone on the next line.
1060 */
1061 return hasuntil;
1062 }
1063
1064 static void
1065 inleap(fields, nfields)
1066 register char ** const fields;
1067 const int nfields;
1068 {
1069 register const char * cp;
1070 register const struct lookup * lp;
1071 register int i, j;
1072 int year, month, day;
1073 long dayoff, tod;
1074 time_t t;
1075
1076 if (nfields != LEAP_FIELDS) {
1077 error(_("wrong number of fields on Leap line"));
1078 return;
1079 }
1080 dayoff = 0;
1081 cp = fields[LP_YEAR];
1082 if (sscanf(cp, scheck(cp, "%d"), &year) != 1) {
1083 /*
1084 * Leapin' Lizards!
1085 */
1086 error(_("invalid leaping year"));
1087 return;
1088 }
1089 j = EPOCH_YEAR;
1090 while (j != year) {
1091 if (year > j) {
1092 i = len_years[isleap(j)];
1093 ++j;
1094 } else {
1095 --j;
1096 i = -len_years[isleap(j)];
1097 }
1098 dayoff = oadd(dayoff, eitol(i));
1099 }
1100 if ((lp = byword(fields[LP_MONTH], mon_names)) == NULL) {
1101 error(_("invalid month name"));
1102 return;
1103 }
1104 month = lp->l_value;
1105 j = TM_JANUARY;
1106 while (j != month) {
1107 i = len_months[isleap(year)][j];
1108 dayoff = oadd(dayoff, eitol(i));
1109 ++j;
1110 }
1111 cp = fields[LP_DAY];
1112 if (sscanf(cp, scheck(cp, "%d"), &day) != 1 ||
1113 day <= 0 || day > len_months[isleap(year)][month]) {
1114 error(_("invalid day of month"));
1115 return;
1116 }
1117 dayoff = oadd(dayoff, eitol(day - 1));
1118 if (dayoff < 0 && !TYPE_SIGNED(time_t)) {
1119 error(_("time before zero"));
1120 return;
1121 }
1122 t = (time_t) dayoff * SECSPERDAY;
1123 /*
1124 ** Cheap overflow check.
1125 */
1126 if (t / SECSPERDAY != dayoff) {
1127 error(_("time overflow"));
1128 return;
1129 }
1130 tod = gethms(fields[LP_TIME], _("invalid time of day"), FALSE);
1131 cp = fields[LP_CORR];
1132 {
1133 register int positive;
1134 int count;
1135
1136 if (strcmp(cp, "") == 0) { /* infile() turns "-" into "" */
1137 positive = FALSE;
1138 count = 1;
1139 } else if (strcmp(cp, "--") == 0) {
1140 positive = FALSE;
1141 count = 2;
1142 } else if (strcmp(cp, "+") == 0) {
1143 positive = TRUE;
1144 count = 1;
1145 } else if (strcmp(cp, "++") == 0) {
1146 positive = TRUE;
1147 count = 2;
1148 } else {
1149 error(_("illegal CORRECTION field on Leap line"));
1150 return;
1151 }
1152 if ((lp = byword(fields[LP_ROLL], leap_types)) == NULL) {
1153 error(_("illegal Rolling/Stationary field on Leap line"));
1154 return;
1155 }
1156 leapadd(tadd(t, tod), positive, lp->l_value, count);
1157 }
1158 }
1159
1160 static void
1161 inlink(fields, nfields)
1162 register char ** const fields;
1163 const int nfields;
1164 {
1165 struct link l;
1166
1167 if (nfields != LINK_FIELDS) {
1168 error(_("wrong number of fields on Link line"));
1169 return;
1170 }
1171 if (*fields[LF_FROM] == '\0') {
1172 error(_("blank FROM field on Link line"));
1173 return;
1174 }
1175 if (*fields[LF_TO] == '\0') {
1176 error(_("blank TO field on Link line"));
1177 return;
1178 }
1179 l.l_filename = filename;
1180 l.l_linenum = linenum;
1181 l.l_from = ecpyalloc(fields[LF_FROM]);
1182 l.l_to = ecpyalloc(fields[LF_TO]);
1183 links = (struct link *) (void *) erealloc((char *) links,
1184 (int) ((nlinks + 1) * sizeof *links));
1185 links[nlinks++] = l;
1186 }
1187
1188 static void
1189 rulesub(rp, loyearp, hiyearp, typep, monthp, dayp, timep)
1190 register struct rule * const rp;
1191 const char * const loyearp;
1192 const char * const hiyearp;
1193 const char * const typep;
1194 const char * const monthp;
1195 const char * const dayp;
1196 const char * const timep;
1197 {
1198 register const struct lookup * lp;
1199 register const char * cp;
1200 register char * dp;
1201 register char * ep;
1202
1203 if ((lp = byword(monthp, mon_names)) == NULL) {
1204 error(_("invalid month name"));
1205 return;
1206 }
1207 rp->r_month = lp->l_value;
1208 rp->r_todisstd = FALSE;
1209 rp->r_todisgmt = FALSE;
1210 dp = ecpyalloc(timep);
1211 if (*dp != '\0') {
1212 ep = dp + strlen(dp) - 1;
1213 switch (lowerit(*ep)) {
1214 case 's': /* Standard */
1215 rp->r_todisstd = TRUE;
1216 rp->r_todisgmt = FALSE;
1217 *ep = '\0';
1218 break;
1219 case 'w': /* Wall */
1220 rp->r_todisstd = FALSE;
1221 rp->r_todisgmt = FALSE;
1222 *ep = '\0';
1223 case 'g': /* Greenwich */
1224 case 'u': /* Universal */
1225 case 'z': /* Zulu */
1226 rp->r_todisstd = TRUE;
1227 rp->r_todisgmt = TRUE;
1228 *ep = '\0';
1229 break;
1230 }
1231 }
1232 rp->r_tod = gethms(dp, _("invalid time of day"), FALSE);
1233 ifree(dp);
1234 /*
1235 ** Year work.
1236 */
1237 cp = loyearp;
1238 lp = byword(cp, begin_years);
1239 if (lp != NULL) switch ((int) lp->l_value) {
1240 case YR_MINIMUM:
1241 rp->r_loyear = INT_MIN;
1242 break;
1243 case YR_MAXIMUM:
1244 rp->r_loyear = INT_MAX;
1245 break;
1246 default: /* "cannot happen" */
1247 (void) fprintf(stderr,
1248 _("%s: panic: Invalid l_value %d\n"),
1249 progname, lp->l_value);
1250 (void) exit(EXIT_FAILURE);
1251 } else if (sscanf(cp, scheck(cp, "%d"), &rp->r_loyear) != 1) {
1252 error(_("invalid starting year"));
1253 return;
1254 }
1255 cp = hiyearp;
1256 if ((lp = byword(cp, end_years)) != NULL) switch ((int) lp->l_value) {
1257 case YR_MINIMUM:
1258 rp->r_hiyear = INT_MIN;
1259 break;
1260 case YR_MAXIMUM:
1261 rp->r_hiyear = INT_MAX;
1262 break;
1263 case YR_ONLY:
1264 rp->r_hiyear = rp->r_loyear;
1265 break;
1266 default: /* "cannot happen" */
1267 (void) fprintf(stderr,
1268 _("%s: panic: Invalid l_value %d\n"),
1269 progname, lp->l_value);
1270 (void) exit(EXIT_FAILURE);
1271 } else if (sscanf(cp, scheck(cp, "%d"), &rp->r_hiyear) != 1) {
1272 error(_("invalid ending year"));
1273 return;
1274 }
1275 if (rp->r_loyear > rp->r_hiyear) {
1276 error(_("starting year greater than ending year"));
1277 return;
1278 }
1279 if (*typep == '\0')
1280 rp->r_yrtype = NULL;
1281 else {
1282 if (rp->r_loyear == rp->r_hiyear) {
1283 error(_("typed single year"));
1284 return;
1285 }
1286 rp->r_yrtype = ecpyalloc(typep);
1287 }
1288 /*
1289 ** Day work.
1290 ** Accept things such as:
1291 ** 1
1292 ** last-Sunday
1293 ** Sun<=20
1294 ** Sun>=7
1295 */
1296 dp = ecpyalloc(dayp);
1297 if ((lp = byword(dp, lasts)) != NULL) {
1298 rp->r_dycode = DC_DOWLEQ;
1299 rp->r_wday = lp->l_value;
1300 rp->r_dayofmonth = len_months[1][rp->r_month];
1301 } else {
1302 if ((ep = strchr(dp, '<')) != 0)
1303 rp->r_dycode = DC_DOWLEQ;
1304 else if ((ep = strchr(dp, '>')) != 0)
1305 rp->r_dycode = DC_DOWGEQ;
1306 else {
1307 ep = dp;
1308 rp->r_dycode = DC_DOM;
1309 }
1310 if (rp->r_dycode != DC_DOM) {
1311 *ep++ = 0;
1312 if (*ep++ != '=') {
1313 error(_("invalid day of month"));
1314 ifree(dp);
1315 return;
1316 }
1317 if ((lp = byword(dp, wday_names)) == NULL) {
1318 error(_("invalid weekday name"));
1319 ifree(dp);
1320 return;
1321 }
1322 rp->r_wday = lp->l_value;
1323 }
1324 if (sscanf(ep, scheck(ep, "%d"), &rp->r_dayofmonth) != 1 ||
1325 rp->r_dayofmonth <= 0 ||
1326 (rp->r_dayofmonth > len_months[1][rp->r_month])) {
1327 error(_("invalid day of month"));
1328 ifree(dp);
1329 return;
1330 }
1331 }
1332 ifree(dp);
1333 }
1334
1335 static void
1336 convert(val, buf)
1337 const long val;
1338 char * const buf;
1339 {
1340 register int i;
1341 register long shift;
1342
1343 for (i = 0, shift = 24; i < 4; ++i, shift -= 8)
1344 buf[i] = val >> shift;
1345 }
1346
1347 static void
1348 puttzcode(val, fp)
1349 const long val;
1350 FILE * const fp;
1351 {
1352 char buf[4];
1353
1354 convert(val, buf);
1355 (void) fwrite((void *) buf, (size_t) sizeof buf, (size_t) 1, fp);
1356 }
1357
1358 static int
1359 atcomp(avp, bvp)
1360 void * avp;
1361 void * bvp;
1362 {
1363 if (((struct attype *) avp)->at < ((struct attype *) bvp)->at)
1364 return -1;
1365 else if (((struct attype *) avp)->at > ((struct attype *) bvp)->at)
1366 return 1;
1367 else return 0;
1368 }
1369
1370 static void
1371 writezone(name)
1372 const char * const name;
1373 {
1374 register FILE * fp;
1375 register int i, j;
1376 static char * fullname;
1377 static struct tzhead tzh;
1378 time_t ats[TZ_MAX_TIMES];
1379 unsigned char types[TZ_MAX_TIMES];
1380
1381 /*
1382 ** Sort.
1383 */
1384 if (timecnt > 1)
1385 (void) qsort((void *) attypes, (size_t) timecnt,
1386 (size_t) sizeof *attypes, atcomp);
1387 /*
1388 ** Optimize.
1389 */
1390 {
1391 int fromi;
1392 int toi;
1393
1394 toi = 0;
1395 fromi = 0;
1396 if (isdsts[0] == 0)
1397 while (attypes[fromi].type == 0)
1398 ++fromi; /* handled by default rule */
1399 for ( ; fromi < timecnt; ++fromi) {
1400 if (toi != 0
1401 && ((attypes[fromi].at
1402 + gmtoffs[attypes[toi - 1].type])
1403 <= (attypes[toi - 1].at
1404 + gmtoffs[toi == 1 ? 0
1405 : attypes[toi - 2].type]))) {
1406 attypes[toi - 1].type = attypes[fromi].type;
1407 continue;
1408 }
1409 if (toi == 0 ||
1410 attypes[toi - 1].type != attypes[fromi].type)
1411 attypes[toi++] = attypes[fromi];
1412 }
1413 timecnt = toi;
1414 }
1415 /*
1416 ** Transfer.
1417 */
1418 for (i = 0; i < timecnt; ++i) {
1419 ats[i] = attypes[i].at;
1420 types[i] = attypes[i].type;
1421 }
1422 fullname = erealloc(fullname,
1423 (int) (strlen(directory) + 1 + strlen(name) + 1));
1424 (void) sprintf(fullname, "%s/%s", directory, name);
1425 if ((fp = fopen(fullname, "wb")) == NULL) {
1426 if (mkdirs(fullname) != 0)
1427 (void) exit(EXIT_FAILURE);
1428 if ((fp = fopen(fullname, "wb")) == NULL) {
1429 const char *e = strerror(errno);
1430 (void) fprintf(stderr, _("%s: Can't create %s: %s\n"),
1431 progname, fullname, e);
1432 (void) exit(EXIT_FAILURE);
1433 }
1434 }
1435 convert(eitol(typecnt), tzh.tzh_ttisgmtcnt);
1436 convert(eitol(typecnt), tzh.tzh_ttisstdcnt);
1437 convert(eitol(leapcnt), tzh.tzh_leapcnt);
1438 convert(eitol(timecnt), tzh.tzh_timecnt);
1439 convert(eitol(typecnt), tzh.tzh_typecnt);
1440 convert(eitol(charcnt), tzh.tzh_charcnt);
1441 #define DO(field) (void) fwrite((void *) tzh.field, (size_t) sizeof tzh.field, (size_t) 1, fp)
1442 DO(tzh_reserved);
1443 DO(tzh_ttisgmtcnt);
1444 DO(tzh_ttisstdcnt);
1445 DO(tzh_leapcnt);
1446 DO(tzh_timecnt);
1447 DO(tzh_typecnt);
1448 DO(tzh_charcnt);
1449 #undef DO
1450 for (i = 0; i < timecnt; ++i) {
1451 j = leapcnt;
1452 while (--j >= 0)
1453 if (ats[i] >= trans[j]) {
1454 ats[i] = tadd(ats[i], corr[j]);
1455 break;
1456 }
1457 puttzcode((long) ats[i], fp);
1458 }
1459 if (timecnt > 0)
1460 (void) fwrite((void *) types, (size_t) sizeof types[0],
1461 (size_t) timecnt, fp);
1462 for (i = 0; i < typecnt; ++i) {
1463 puttzcode((long) gmtoffs[i], fp);
1464 (void) putc(isdsts[i], fp);
1465 (void) putc(abbrinds[i], fp);
1466 }
1467 if (charcnt != 0)
1468 (void) fwrite((void *) chars, (size_t) sizeof chars[0],
1469 (size_t) charcnt, fp);
1470 for (i = 0; i < leapcnt; ++i) {
1471 if (roll[i]) {
1472 if (timecnt == 0 || trans[i] < ats[0]) {
1473 j = 0;
1474 while (isdsts[j])
1475 if (++j >= typecnt) {
1476 j = 0;
1477 break;
1478 }
1479 } else {
1480 j = 1;
1481 while (j < timecnt && trans[i] >= ats[j])
1482 ++j;
1483 j = types[j - 1];
1484 }
1485 puttzcode((long) tadd(trans[i], -gmtoffs[j]), fp);
1486 } else puttzcode((long) trans[i], fp);
1487 puttzcode((long) corr[i], fp);
1488 }
1489 for (i = 0; i < typecnt; ++i)
1490 (void) putc(ttisstds[i], fp);
1491 for (i = 0; i < typecnt; ++i)
1492 (void) putc(ttisgmts[i], fp);
1493 if (ferror(fp) || fclose(fp)) {
1494 (void) fprintf(stderr, _("%s: Error writing %s\n"),
1495 progname, fullname);
1496 (void) exit(EXIT_FAILURE);
1497 }
1498 }
1499
1500 static void
1501 doabbr(abbr, format, letters, isdst)
1502 char * const abbr;
1503 const char * const format;
1504 const char * const letters;
1505 const int isdst;
1506 {
1507 if (strchr(format, '/') == NULL) {
1508 if (letters == NULL)
1509 (void) strcpy(abbr, format);
1510 else (void) sprintf(abbr, format, letters);
1511 } else if (isdst)
1512 (void) strcpy(abbr, strchr(format, '/') + 1);
1513 else {
1514 (void) strcpy(abbr, format);
1515 *strchr(abbr, '/') = '\0';
1516 }
1517 }
1518
1519 static void
1520 outzone(zpfirst, zonecount)
1521 const struct zone * const zpfirst;
1522 const int zonecount;
1523 {
1524 register const struct zone * zp;
1525 register struct rule * rp;
1526 register int i, j;
1527 register int usestart, useuntil;
1528 register time_t starttime, untiltime;
1529 register long gmtoff;
1530 register long stdoff;
1531 register int year;
1532 register long startoff;
1533 register int startttisstd;
1534 register int startttisgmt;
1535 register int type;
1536 char startbuf[BUFSIZ];
1537
1538 INITIALIZE(untiltime);
1539 INITIALIZE(starttime);
1540 /*
1541 ** Now. . .finally. . .generate some useful data!
1542 */
1543 timecnt = 0;
1544 typecnt = 0;
1545 charcnt = 0;
1546 /*
1547 ** A guess that may well be corrected later.
1548 */
1549 stdoff = 0;
1550 /*
1551 ** Thanks to Earl Chew (earl@dnd.icp.nec.com.au)
1552 ** for noting the need to unconditionally initialize startttisstd.
1553 */
1554 startttisstd = FALSE;
1555 startttisgmt = FALSE;
1556 for (i = 0; i < zonecount; ++i) {
1557 zp = &zpfirst[i];
1558 usestart = i > 0 && (zp - 1)->z_untiltime > min_time;
1559 useuntil = i < (zonecount - 1);
1560 if (useuntil && zp->z_untiltime <= min_time)
1561 continue;
1562 gmtoff = zp->z_gmtoff;
1563 eat(zp->z_filename, zp->z_linenum);
1564 *startbuf = '\0';
1565 startoff = zp->z_gmtoff;
1566 if (zp->z_nrules == 0) {
1567 stdoff = zp->z_stdoff;
1568 doabbr(startbuf, zp->z_format,
1569 (char *) NULL, stdoff != 0);
1570 type = addtype(oadd(zp->z_gmtoff, stdoff),
1571 startbuf, stdoff != 0, startttisstd,
1572 startttisgmt);
1573 if (usestart) {
1574 addtt(starttime, type);
1575 usestart = FALSE;
1576 }
1577 else if (stdoff != 0)
1578 addtt(min_time, type);
1579 } else for (year = min_year; year <= max_year; ++year) {
1580 if (useuntil && year > zp->z_untilrule.r_hiyear)
1581 break;
1582 /*
1583 ** Mark which rules to do in the current year.
1584 ** For those to do, calculate rpytime(rp, year);
1585 */
1586 for (j = 0; j < zp->z_nrules; ++j) {
1587 rp = &zp->z_rules[j];
1588 eats(zp->z_filename, zp->z_linenum,
1589 rp->r_filename, rp->r_linenum);
1590 rp->r_todo = year >= rp->r_loyear &&
1591 year <= rp->r_hiyear &&
1592 yearistype(year, rp->r_yrtype);
1593 if (rp->r_todo)
1594 rp->r_temp = rpytime(rp, year);
1595 }
1596 for ( ; ; ) {
1597 register int k;
1598 register time_t jtime, ktime;
1599 register long offset;
1600 char buf[BUFSIZ];
1601
1602 INITIALIZE(ktime);
1603 if (useuntil) {
1604 /*
1605 ** Turn untiltime into GMT
1606 ** assuming the current gmtoff and
1607 ** stdoff values.
1608 */
1609 untiltime = zp->z_untiltime;
1610 if (!zp->z_untilrule.r_todisgmt)
1611 untiltime = tadd(untiltime,
1612 -gmtoff);
1613 if (!zp->z_untilrule.r_todisstd)
1614 untiltime = tadd(untiltime,
1615 -stdoff);
1616 }
1617 /*
1618 ** Find the rule (of those to do, if any)
1619 ** that takes effect earliest in the year.
1620 */
1621 k = -1;
1622 for (j = 0; j < zp->z_nrules; ++j) {
1623 rp = &zp->z_rules[j];
1624 if (!rp->r_todo)
1625 continue;
1626 eats(zp->z_filename, zp->z_linenum,
1627 rp->r_filename, rp->r_linenum);
1628 offset = rp->r_todisgmt ? 0 : gmtoff;
1629 if (!rp->r_todisstd)
1630 offset = oadd(offset, stdoff);
1631 jtime = rp->r_temp;
1632 if (jtime == min_time ||
1633 jtime == max_time)
1634 continue;
1635 jtime = tadd(jtime, -offset);
1636 if (k < 0 || jtime < ktime) {
1637 k = j;
1638 ktime = jtime;
1639 }
1640 }
1641 if (k < 0)
1642 break; /* go on to next year */
1643 rp = &zp->z_rules[k];
1644 rp->r_todo = FALSE;
1645 if (useuntil && ktime >= untiltime)
1646 break;
1647 stdoff = rp->r_stdoff;
1648 if (usestart && ktime == starttime)
1649 usestart = FALSE;
1650 if (usestart) {
1651 if (ktime < starttime) {
1652 startoff = oadd(zp->z_gmtoff,
1653 stdoff);
1654 doabbr(startbuf, zp->z_format,
1655 rp->r_abbrvar,
1656 rp->r_stdoff != 0);
1657 continue;
1658 }
1659 if (*startbuf == '\0' &&
1660 startoff == oadd(zp->z_gmtoff,
1661 stdoff)) {
1662 doabbr(startbuf, zp->z_format,
1663 rp->r_abbrvar,
1664 rp->r_stdoff != 0);
1665 }
1666 }
1667 eats(zp->z_filename, zp->z_linenum,
1668 rp->r_filename, rp->r_linenum);
1669 doabbr(buf, zp->z_format, rp->r_abbrvar,
1670 rp->r_stdoff != 0);
1671 offset = oadd(zp->z_gmtoff, rp->r_stdoff);
1672 type = addtype(offset, buf, rp->r_stdoff != 0,
1673 rp->r_todisstd, rp->r_todisgmt);
1674 addtt(ktime, type);
1675 }
1676 }
1677 if (usestart) {
1678 if (*startbuf == '\0' &&
1679 zp->z_format != NULL &&
1680 strchr(zp->z_format, '%') == NULL &&
1681 strchr(zp->z_format, '/') == NULL)
1682 (void) strcpy(startbuf, zp->z_format);
1683 eat(zp->z_filename, zp->z_linenum);
1684 if (*startbuf == '\0')
1685 error(_("can't determine time zone abbrevation to use just after until time"));
1686 else addtt(starttime,
1687 addtype(startoff, startbuf,
1688 startoff != zp->z_gmtoff,
1689 startttisstd,
1690 startttisgmt));
1691 }
1692 /*
1693 ** Now we may get to set starttime for the next zone line.
1694 */
1695 if (useuntil) {
1696 startttisstd = zp->z_untilrule.r_todisstd;
1697 startttisgmt = zp->z_untilrule.r_todisgmt;
1698 starttime = zp->z_untiltime;
1699 if (!startttisstd)
1700 starttime = tadd(starttime, -stdoff);
1701 if (!startttisgmt)
1702 starttime = tadd(starttime, -gmtoff);
1703 }
1704 }
1705 writezone(zpfirst->z_name);
1706 }
1707
1708 static void
1709 addtt(starttime, type)
1710 const time_t starttime;
1711 const int type;
1712 {
1713 if (timecnt >= TZ_MAX_TIMES) {
1714 error(_("too many transitions?!"));
1715 (void) exit(EXIT_FAILURE);
1716 }
1717 attypes[timecnt].at = starttime;
1718 attypes[timecnt].type = type;
1719 ++timecnt;
1720 }
1721
1722 static int
1723 addtype(gmtoff, abbr, isdst, ttisstd, ttisgmt)
1724 const long gmtoff;
1725 const char * const abbr;
1726 const int isdst;
1727 const int ttisstd;
1728 const int ttisgmt;
1729 {
1730 register int i, j;
1731
1732 if (isdst != TRUE && isdst != FALSE) {
1733 error(_("internal error - addtype called with bad isdst"));
1734 (void) exit(EXIT_FAILURE);
1735 }
1736 if (ttisstd != TRUE && ttisstd != FALSE) {
1737 error(_("internal error - addtype called with bad ttisstd"));
1738 (void) exit(EXIT_FAILURE);
1739 }
1740 if (ttisgmt != TRUE && ttisgmt != FALSE) {
1741 error(_("internal error - addtype called with bad ttisgmt"));
1742 (void) exit(EXIT_FAILURE);
1743 }
1744 /*
1745 ** See if there's already an entry for this zone type.
1746 ** If so, just return its index.
1747 */
1748 for (i = 0; i < typecnt; ++i) {
1749 if (gmtoff == gmtoffs[i] && isdst == isdsts[i] &&
1750 strcmp(abbr, &chars[abbrinds[i]]) == 0 &&
1751 ttisstd == ttisstds[i] &&
1752 ttisgmt == ttisgmts[i])
1753 return i;
1754 }
1755 /*
1756 ** There isn't one; add a new one, unless there are already too
1757 ** many.
1758 */
1759 if (typecnt >= TZ_MAX_TYPES) {
1760 error(_("too many local time types"));
1761 (void) exit(EXIT_FAILURE);
1762 }
1763 gmtoffs[i] = gmtoff;
1764 isdsts[i] = isdst;
1765 ttisstds[i] = ttisstd;
1766 ttisgmts[i] = ttisgmt;
1767
1768 for (j = 0; j < charcnt; ++j)
1769 if (strcmp(&chars[j], abbr) == 0)
1770 break;
1771 if (j == charcnt)
1772 newabbr(abbr);
1773 abbrinds[i] = j;
1774 ++typecnt;
1775 return i;
1776 }
1777
1778 static void
1779 leapadd(t, positive, rolling, count)
1780 const time_t t;
1781 const int positive;
1782 const int rolling;
1783 int count;
1784 {
1785 register int i, j;
1786
1787 if (leapcnt + (positive ? count : 1) > TZ_MAX_LEAPS) {
1788 error(_("too many leap seconds"));
1789 (void) exit(EXIT_FAILURE);
1790 }
1791 for (i = 0; i < leapcnt; ++i)
1792 if (t <= trans[i]) {
1793 if (t == trans[i]) {
1794 error(_("repeated leap second moment"));
1795 (void) exit(EXIT_FAILURE);
1796 }
1797 break;
1798 }
1799 do {
1800 for (j = leapcnt; j > i; --j) {
1801 trans[j] = trans[j - 1];
1802 corr[j] = corr[j - 1];
1803 roll[j] = roll[j - 1];
1804 }
1805 trans[i] = t;
1806 corr[i] = positive ? 1L : eitol(-count);
1807 roll[i] = rolling;
1808 ++leapcnt;
1809 } while (positive && --count != 0);
1810 }
1811
1812 static void
1813 adjleap P((void))
1814 {
1815 register int i;
1816 register long last = 0;
1817
1818 /*
1819 ** propagate leap seconds forward
1820 */
1821 for (i = 0; i < leapcnt; ++i) {
1822 trans[i] = tadd(trans[i], last);
1823 last = corr[i] += last;
1824 }
1825 }
1826
1827 static int
1828 yearistype(year, type)
1829 const int year;
1830 const char * const type;
1831 {
1832 static char * buf;
1833 int result;
1834
1835 if (type == NULL || *type == '\0')
1836 return TRUE;
1837 buf = erealloc(buf, (int) (132 + strlen(yitcommand) + strlen(type)));
1838 (void) sprintf(buf, "%s %d %s", yitcommand, year, type);
1839 result = system(buf);
1840 if (result == 0)
1841 return TRUE;
1842 if (result == (1 << 8))
1843 return FALSE;
1844 error(_("Wild result from command execution"));
1845 (void) fprintf(stderr, _("%s: command was '%s', result was %d\n"),
1846 progname, buf, result);
1847 for ( ; ; )
1848 (void) exit(EXIT_FAILURE);
1849 }
1850
1851 static int
1852 lowerit(a)
1853 int a;
1854 {
1855 a = (unsigned char) a;
1856 return (isascii(a) && isupper(a)) ? tolower(a) : a;
1857 }
1858
1859 static int
1860 ciequal(ap, bp) /* case-insensitive equality */
1861 register const char * ap;
1862 register const char * bp;
1863 {
1864 while (lowerit(*ap) == lowerit(*bp++))
1865 if (*ap++ == '\0')
1866 return TRUE;
1867 return FALSE;
1868 }
1869
1870 static int
1871 itsabbr(abbr, word)
1872 register const char * abbr;
1873 register const char * word;
1874 {
1875 if (lowerit(*abbr) != lowerit(*word))
1876 return FALSE;
1877 ++word;
1878 while (*++abbr != '\0')
1879 do {
1880 if (*word == '\0')
1881 return FALSE;
1882 } while (lowerit(*word++) != lowerit(*abbr));
1883 return TRUE;
1884 }
1885
1886 static const struct lookup *
1887 byword(word, table)
1888 register const char * const word;
1889 register const struct lookup * const table;
1890 {
1891 register const struct lookup * foundlp;
1892 register const struct lookup * lp;
1893
1894 if (word == NULL || table == NULL)
1895 return NULL;
1896 /*
1897 ** Look for exact match.
1898 */
1899 for (lp = table; lp->l_word != NULL; ++lp)
1900 if (ciequal(word, lp->l_word))
1901 return lp;
1902 /*
1903 ** Look for inexact match.
1904 */
1905 foundlp = NULL;
1906 for (lp = table; lp->l_word != NULL; ++lp)
1907 if (itsabbr(word, lp->l_word))
1908 if (foundlp == NULL)
1909 foundlp = lp;
1910 else return NULL; /* multiple inexact matches */
1911 return foundlp;
1912 }
1913
1914 static char **
1915 getfields(cp)
1916 register char * cp;
1917 {
1918 register char * dp;
1919 register char ** array;
1920 register int nsubs;
1921
1922 if (cp == NULL)
1923 return NULL;
1924 array = (char **) (void *)
1925 emalloc((int) ((strlen(cp) + 1) * sizeof *array));
1926 nsubs = 0;
1927 for ( ; ; ) {
1928 while (isascii(*cp) && isspace((unsigned char) *cp))
1929 ++cp;
1930 if (*cp == '\0' || *cp == '#')
1931 break;
1932 array[nsubs++] = dp = cp;
1933 do {
1934 if ((*dp = *cp++) != '"')
1935 ++dp;
1936 else while ((*dp = *cp++) != '"')
1937 if (*dp != '\0')
1938 ++dp;
1939 else error(_("Odd number of quotation marks"));
1940 } while (*cp != '\0' && *cp != '#' &&
1941 (!isascii(*cp) || !isspace((unsigned char) *cp)));
1942 if (isascii(*cp) && isspace((unsigned char) *cp))
1943 ++cp;
1944 *dp = '\0';
1945 }
1946 array[nsubs] = NULL;
1947 return array;
1948 }
1949
1950 static long
1951 oadd(t1, t2)
1952 const long t1;
1953 const long t2;
1954 {
1955 register long t;
1956
1957 t = t1 + t2;
1958 if ((t2 > 0 && t <= t1) || (t2 < 0 && t >= t1)) {
1959 error(_("time overflow"));
1960 (void) exit(EXIT_FAILURE);
1961 }
1962 return t;
1963 }
1964
1965 static time_t
1966 tadd(t1, t2)
1967 const time_t t1;
1968 const long t2;
1969 {
1970 register time_t t;
1971
1972 if (t1 == max_time && t2 > 0)
1973 return max_time;
1974 if (t1 == min_time && t2 < 0)
1975 return min_time;
1976 t = t1 + t2;
1977 if ((t2 > 0 && t <= t1) || (t2 < 0 && t >= t1)) {
1978 error(_("time overflow"));
1979 (void) exit(EXIT_FAILURE);
1980 }
1981 return t;
1982 }
1983
1984 /*
1985 ** Given a rule, and a year, compute the date - in seconds since January 1,
1986 ** 1970, 00:00 LOCAL time - in that year that the rule refers to.
1987 */
1988
1989 static time_t
1990 rpytime(rp, wantedy)
1991 register const struct rule * const rp;
1992 register const int wantedy;
1993 {
1994 register int y, m, i;
1995 register long dayoff; /* with a nod to Margaret O. */
1996 register time_t t;
1997
1998 if (wantedy == INT_MIN)
1999 return min_time;
2000 if (wantedy == INT_MAX)
2001 return max_time;
2002 dayoff = 0;
2003 m = TM_JANUARY;
2004 y = EPOCH_YEAR;
2005 while (wantedy != y) {
2006 if (wantedy > y) {
2007 i = len_years[isleap(y)];
2008 ++y;
2009 } else {
2010 --y;
2011 i = -len_years[isleap(y)];
2012 }
2013 dayoff = oadd(dayoff, eitol(i));
2014 }
2015 while (m != rp->r_month) {
2016 i = len_months[isleap(y)][m];
2017 dayoff = oadd(dayoff, eitol(i));
2018 ++m;
2019 }
2020 i = rp->r_dayofmonth;
2021 if (m == TM_FEBRUARY && i == 29 && !isleap(y)) {
2022 if (rp->r_dycode == DC_DOWLEQ)
2023 --i;
2024 else {
2025 error(_("use of 2/29 in non leap-year"));
2026 (void) exit(EXIT_FAILURE);
2027 }
2028 }
2029 --i;
2030 dayoff = oadd(dayoff, eitol(i));
2031 if (rp->r_dycode == DC_DOWGEQ || rp->r_dycode == DC_DOWLEQ) {
2032 register long wday;
2033
2034 #define LDAYSPERWEEK ((long) DAYSPERWEEK)
2035 wday = eitol(EPOCH_WDAY);
2036 /*
2037 ** Don't trust mod of negative numbers.
2038 */
2039 if (dayoff >= 0)
2040 wday = (wday + dayoff) % LDAYSPERWEEK;
2041 else {
2042 wday -= ((-dayoff) % LDAYSPERWEEK);
2043 if (wday < 0)
2044 wday += LDAYSPERWEEK;
2045 }
2046 while (wday != eitol(rp->r_wday))
2047 if (rp->r_dycode == DC_DOWGEQ) {
2048 dayoff = oadd(dayoff, (long) 1);
2049 if (++wday >= LDAYSPERWEEK)
2050 wday = 0;
2051 ++i;
2052 } else {
2053 dayoff = oadd(dayoff, (long) -1);
2054 if (--wday < 0)
2055 wday = LDAYSPERWEEK - 1;
2056 --i;
2057 }
2058 if (i < 0 || i >= len_months[isleap(y)][m]) {
2059 error(_("no day in month matches rule"));
2060 (void) exit(EXIT_FAILURE);
2061 }
2062 }
2063 if (dayoff < 0 && !TYPE_SIGNED(time_t))
2064 return min_time;
2065 t = (time_t) dayoff * SECSPERDAY;
2066 /*
2067 ** Cheap overflow check.
2068 */
2069 if (t / SECSPERDAY != dayoff)
2070 return (dayoff > 0) ? max_time : min_time;
2071 return tadd(t, rp->r_tod);
2072 }
2073
2074 static void
2075 newabbr(string)
2076 const char * const string;
2077 {
2078 register int i;
2079
2080 i = strlen(string) + 1;
2081 if (charcnt + i > TZ_MAX_CHARS) {
2082 error(_("too many, or too long, time zone abbreviations"));
2083 (void) exit(EXIT_FAILURE);
2084 }
2085 (void) strcpy(&chars[charcnt], string);
2086 charcnt += eitol(i);
2087 }
2088
2089 static int
2090 mkdirs(argname)
2091 char * const argname;
2092 {
2093 register char * name;
2094 register char * cp;
2095
2096 if (argname == NULL || *argname == '\0')
2097 return 0;
2098 cp = name = ecpyalloc(argname);
2099 while ((cp = strchr(cp + 1, '/')) != 0) {
2100 *cp = '\0';
2101 #ifndef unix
2102 /*
2103 ** DOS drive specifier?
2104 */
2105 if (isalpha((unsigned char) name[0]) &&
2106 name[1] == ':' && name[2] == '\0') {
2107 *cp = '/';
2108 continue;
2109 }
2110 #endif /* !defined unix */
2111 if (!itsdir(name)) {
2112 /*
2113 ** It doesn't seem to exist, so we try to create it.
2114 */
2115 if (mkdir(name, 0755) != 0) {
2116 const char *e = strerror(errno);
2117 (void) fprintf(stderr,
2118 _("%s: Can't create directory %s: %s\n"),
2119 progname, name, e);
2120 ifree(name);
2121 return -1;
2122 }
2123 }
2124 *cp = '/';
2125 }
2126 ifree(name);
2127 return 0;
2128 }
2129
2130 static long
2131 eitol(i)
2132 const int i;
2133 {
2134 long l;
2135
2136 l = i;
2137 if ((i < 0 && l >= 0) || (i == 0 && l != 0) || (i > 0 && l <= 0)) {
2138 (void) fprintf(stderr,
2139 _("%s: %d did not sign extend correctly\n"),
2140 progname, i);
2141 (void) exit(EXIT_FAILURE);
2142 }
2143 return l;
2144 }
2145
2146 /*
2147 ** UNIX was a registered trademark of UNIX System Laboratories in 1993.
2148 */
Unaltered CVS history