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MFC r1.6 r1.30 r1.28 (HEAD):
[dragonfly.git] / usr.sbin / zic / zic.c
blobc4a83b132365a5cb53f2e172759009038a216da2
1 #ifndef lint
2 #ifndef NOID
3 static char elsieid[] = "@(#)zic.c 7.96";
4 #endif /* !defined NOID */
5 #endif /* !defined lint */
6
7 /*
8 * @(#)zic.c 7.96
9 * $FreeBSD: src/usr.sbin/zic/zic.c,v 1.11 1999/08/28 01:21:20 peter Exp $
10 * $DragonFly: src/usr.sbin/zic/zic.c,v 1.6 2004/12/18 22:48:15 swildner Exp $
11 */
12 #include "private.h"
13 #include "tzfile.h"
14 #include <err.h>
15 #include <locale.h>
16 #include <sys/stat.h> /* for umask manifest constants */
17 #include <sys/types.h>
18 #include <unistd.h>
19
20 /*
21 ** On some ancient hosts, predicates like `isspace(C)' are defined
22 ** only if isascii(C) || C == EOF. Modern hosts obey the C Standard,
23 ** which says they are defined only if C == ((unsigned char) C) || C == EOF.
24 ** Neither the C Standard nor Posix require that `isascii' exist.
25 ** For portability, we check both ancient and modern requirements.
26 ** If isascii is not defined, the isascii check succeeds trivially.
27 */
28 #include "ctype.h"
29 #ifndef isascii
30 #define isascii(x) 1
31 #endif
32
33 struct rule {
34 const char * r_filename;
35 int r_linenum;
36 const char * r_name;
37
38 int r_loyear; /* for example, 1986 */
39 int r_hiyear; /* for example, 1986 */
40 const char * r_yrtype;
41
42 int r_month; /* 0..11 */
43
44 int r_dycode; /* see below */
45 int r_dayofmonth;
46 int r_wday;
47
48 long r_tod; /* time from midnight */
49 int r_todisstd; /* above is standard time if TRUE */
50 /* or wall clock time if FALSE */
51 int r_todisgmt; /* above is GMT if TRUE */
52 /* or local time if FALSE */
53 long r_stdoff; /* offset from standard time */
54 const char * r_abbrvar; /* variable part of abbreviation */
55
56 int r_todo; /* a rule to do (used in outzone) */
57 time_t r_temp; /* used in outzone */
58 };
59
60 /*
61 ** r_dycode r_dayofmonth r_wday
62 */
63
64 #define DC_DOM 0 /* 1..31 */ /* unused */
65 #define DC_DOWGEQ 1 /* 1..31 */ /* 0..6 (Sun..Sat) */
66 #define DC_DOWLEQ 2 /* 1..31 */ /* 0..6 (Sun..Sat) */
67
68 struct zone {
69 const char * z_filename;
70 int z_linenum;
71
72 const char * z_name;
73 long z_gmtoff;
74 const char * z_rule;
75 const char * z_format;
76
77 long z_stdoff;
78
79 struct rule * z_rules;
80 int z_nrules;
81
82 struct rule z_untilrule;
83 time_t z_untiltime;
84 };
85
86 static void addtt(time_t starttime, int type);
87 static int addtype(long gmtoff, const char *abbr, int isdst,
88 int ttisstd, int ttisgmt);
89 static void leapadd(time_t t, int positive, int rolling, int count);
90 static void adjleap(void);
91 static void associate(void);
92 static int ciequal(const char *ap, const char *bp);
93 static void convert(long val, char *buf);
94 static void dolink(const char *fromfile, const char *tofile);
95 static void doabbr(char *abbr, const char *format,
96 const char *letters, int isdst);
97 static void eat(const char *name, int num);
98 static void eats(const char *name, int num,
99 const char *rname, int rnum);
100 static long eitol(int i);
101 static void error(const char *message);
102 static char ** getfields(char *buf);
103 static long gethms(const char *string, const char *errstrng,
104 int signable);
105 static void infile(const char *filename);
106 static void inleap(char **fields, int nfields);
107 static void inlink(char **fields, int nfields);
108 static void inrule(char **fields, int nfields);
109 static int inzcont(char **fields, int nfields);
110 static int inzone(char **fields, int nfields);
111 static int inzsub(char **fields, int nfields, int iscont);
112 static int itsabbr(const char *abbr, const char *word);
113 static int itsdir(const char *name);
114 static int lowerit(int c);
115 static char * memcheck(char *tocheck);
116 static int mkdirs(char *filename);
117 static void newabbr(const char *abbr);
118 static long oadd(long t1, long t2);
119 static void outzone(const struct zone *zp, int ntzones);
120 static void puttzcode(long code, FILE *fp);
121 static int rcomp(const void *leftp, const void *rightp);
122 static time_t rpytime(const struct rule *rp, int wantedy);
123 static void rulesub(struct rule *rp,
124 const char *loyearp, const char *hiyearp,
125 const char *typep, const char *monthp,
126 const char *dayp, const char *timep);
127 static void setboundaries(void);
128 static void setgroup(gid_t *flag, const char *name);
129 static void setuser(uid_t *flag, const char *name);
130 static time_t tadd(time_t t1, long t2);
131 static void usage(void);
132 static void writezone(const char *name);
133 static int yearistype(int year, const char *type);
134
135 #if !(HAVE_STRERROR - 0)
136 static char * strerror(int);
137 #endif /* !(HAVE_STRERROR - 0) */
138
139 static int charcnt;
140 static int errors;
141 static const char * filename;
142 static int leapcnt;
143 static int linenum;
144 static time_t max_time;
145 static int max_year;
146 static int max_year_representable;
147 static time_t min_time;
148 static int min_year;
149 static int min_year_representable;
150 static int noise;
151 static const char * rfilename;
152 static int rlinenum;
153 static int timecnt;
154 static int typecnt;
155
156 /*
157 ** Line codes.
158 */
159
160 #define LC_RULE 0
161 #define LC_ZONE 1
162 #define LC_LINK 2
163 #define LC_LEAP 3
164
165 /*
166 ** Which fields are which on a Zone line.
167 */
168
169 #define ZF_NAME 1
170 #define ZF_GMTOFF 2
171 #define ZF_RULE 3
172 #define ZF_FORMAT 4
173 #define ZF_TILYEAR 5
174 #define ZF_TILMONTH 6
175 #define ZF_TILDAY 7
176 #define ZF_TILTIME 8
177 #define ZONE_MINFIELDS 5
178 #define ZONE_MAXFIELDS 9
179
180 /*
181 ** Which fields are which on a Zone continuation line.
182 */
183
184 #define ZFC_GMTOFF 0
185 #define ZFC_RULE 1
186 #define ZFC_FORMAT 2
187 #define ZFC_TILYEAR 3
188 #define ZFC_TILMONTH 4
189 #define ZFC_TILDAY 5
190 #define ZFC_TILTIME 6
191 #define ZONEC_MINFIELDS 3
192 #define ZONEC_MAXFIELDS 7
193
194 /*
195 ** Which files are which on a Rule line.
196 */
197
198 #define RF_NAME 1
199 #define RF_LOYEAR 2
200 #define RF_HIYEAR 3
201 #define RF_COMMAND 4
202 #define RF_MONTH 5
203 #define RF_DAY 6
204 #define RF_TOD 7
205 #define RF_STDOFF 8
206 #define RF_ABBRVAR 9
207 #define RULE_FIELDS 10
208
209 /*
210 ** Which fields are which on a Link line.
211 */
212
213 #define LF_FROM 1
214 #define LF_TO 2
215 #define LINK_FIELDS 3
216
217 /*
218 ** Which fields are which on a Leap line.
219 */
220
221 #define LP_YEAR 1
222 #define LP_MONTH 2
223 #define LP_DAY 3
224 #define LP_TIME 4
225 #define LP_CORR 5
226 #define LP_ROLL 6
227 #define LEAP_FIELDS 7
228
229 /*
230 ** Year synonyms.
231 */
232
233 #define YR_MINIMUM 0
234 #define YR_MAXIMUM 1
235 #define YR_ONLY 2
236
237 static struct rule * rules;
238 static int nrules; /* number of rules */
239
240 static struct zone * zones;
241 static int nzones; /* number of zones */
242
243 struct link {
244 const char * l_filename;
245 int l_linenum;
246 const char * l_from;
247 const char * l_to;
248 };
249
250 static struct link * links;
251 static int nlinks;
252
253 struct lookup {
254 const char * l_word;
255 const int l_value;
256 };
257
258 static struct lookup const *byword(const char *string,
259 const struct lookup *lp);
260
261 static struct lookup const line_codes[] = {
262 { "Rule", LC_RULE },
263 { "Zone", LC_ZONE },
264 { "Link", LC_LINK },
265 { "Leap", LC_LEAP },
266 { NULL, 0}
267 };
268
269 static struct lookup const mon_names[] = {
270 { "January", TM_JANUARY },
271 { "February", TM_FEBRUARY },
272 { "March", TM_MARCH },
273 { "April", TM_APRIL },
274 { "May", TM_MAY },
275 { "June", TM_JUNE },
276 { "July", TM_JULY },
277 { "August", TM_AUGUST },
278 { "September", TM_SEPTEMBER },
279 { "October", TM_OCTOBER },
280 { "November", TM_NOVEMBER },
281 { "December", TM_DECEMBER },
282 { NULL, 0 }
283 };
284
285 static struct lookup const wday_names[] = {
286 { "Sunday", TM_SUNDAY },
287 { "Monday", TM_MONDAY },
288 { "Tuesday", TM_TUESDAY },
289 { "Wednesday", TM_WEDNESDAY },
290 { "Thursday", TM_THURSDAY },
291 { "Friday", TM_FRIDAY },
292 { "Saturday", TM_SATURDAY },
293 { NULL, 0 }
294 };
295
296 static struct lookup const lasts[] = {
297 { "last-Sunday", TM_SUNDAY },
298 { "last-Monday", TM_MONDAY },
299 { "last-Tuesday", TM_TUESDAY },
300 { "last-Wednesday", TM_WEDNESDAY },
301 { "last-Thursday", TM_THURSDAY },
302 { "last-Friday", TM_FRIDAY },
303 { "last-Saturday", TM_SATURDAY },
304 { NULL, 0 }
305 };
306
307 static struct lookup const begin_years[] = {
308 { "minimum", YR_MINIMUM },
309 { "maximum", YR_MAXIMUM },
310 { NULL, 0 }
311 };
312
313 static struct lookup const end_years[] = {
314 { "minimum", YR_MINIMUM },
315 { "maximum", YR_MAXIMUM },
316 { "only", YR_ONLY },
317 { NULL, 0 }
318 };
319
320 static struct lookup const leap_types[] = {
321 { "Rolling", TRUE },
322 { "Stationary", FALSE },
323 { NULL, 0 }
324 };
325
326 static const int len_months[2][MONSPERYEAR] = {
327 { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 },
328 { 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }
329 };
330
331 static const int len_years[2] = {
332 DAYSPERNYEAR, DAYSPERLYEAR
333 };
334
335 static struct attype {
336 time_t at;
337 unsigned char type;
338 } attypes[TZ_MAX_TIMES];
339 static long gmtoffs[TZ_MAX_TYPES];
340 static char isdsts[TZ_MAX_TYPES];
341 static unsigned char abbrinds[TZ_MAX_TYPES];
342 static char ttisstds[TZ_MAX_TYPES];
343 static char ttisgmts[TZ_MAX_TYPES];
344 static char chars[TZ_MAX_CHARS];
345 static time_t trans[TZ_MAX_LEAPS];
346 static long corr[TZ_MAX_LEAPS];
347 static char roll[TZ_MAX_LEAPS];
348
349 /*
350 ** Memory allocation.
351 */
352
353 static char *
354 memcheck(char * const ptr)
355 {
356 if (ptr == NULL)
357 errx(EXIT_FAILURE, _("memory exhausted"));
358 return ptr;
359 }
360
361 #define emalloc(size) memcheck(imalloc(size))
362 #define erealloc(ptr, size) memcheck(irealloc((ptr), (size)))
363 #define ecpyalloc(ptr) memcheck(icpyalloc(ptr))
364 #define ecatalloc(oldp, newp) memcheck(icatalloc((oldp), (newp)))
365
366 /*
367 ** Error handling.
368 */
369
370 #if !(HAVE_STRERROR - 0)
371 static char *
372 strerror(int errnum)
373 {
374 extern char * sys_errlist[];
375 extern int sys_nerr;
376
377 return (errnum > 0 && errnum <= sys_nerr) ?
378 sys_errlist[errnum] : _("Unknown system error");
379 }
380 #endif /* !(HAVE_STRERROR - 0) */
381
382 static void
383 eats(const char * const name, const int num,
384 const char * const rname, const int rnum)
385 {
386 filename = name;
387 linenum = num;
388 rfilename = rname;
389 rlinenum = rnum;
390 }
391
392 static void
393 eat(const char * const name, const int num)
394 {
395 eats(name, num, (char *) NULL, -1);
396 }
397
398 static void
399 error(const char * const string)
400 {
401 /*
402 ** Match the format of "cc" to allow sh users to
403 ** zic ... 2>&1 | error -t "*" -v
404 ** on BSD systems.
405 */
406 fprintf(stderr, _("\"%s\", line %d: %s"),
407 filename, linenum, string);
408 if (rfilename != NULL)
409 fprintf(stderr, _(" (rule from \"%s\", line %d)"),
410 rfilename, rlinenum);
411 fprintf(stderr, "\n");
412 ++errors;
413 }
414
415 static void
416 warning(const char * const string)
417 {
418 char * cp;
419
420 cp = ecpyalloc(_("warning: "));
421 cp = ecatalloc(cp, string);
422 error(cp);
423 ifree(cp);
424 --errors;
425 }
426
427 static void
428 usage(void)
429 {
430 fprintf(stderr, "%s\n%s\n",
431 _("usage: zic [-s] [-v] [-l localtime] [-p posixrules] [-d directory]"),
432 _(" [-L leapseconds] [-y yearistype] [filename ... ]"));
433 exit(EXIT_FAILURE);
434 }
435
436 static const char * psxrules;
437 static const char * lcltime;
438 static const char * directory;
439 static const char * leapsec;
440 static const char * yitcommand;
441 static int sflag = FALSE;
442 static int Dflag;
443 static uid_t uflag = (uid_t)-1;
444 static gid_t gflag = (gid_t)-1;
445 static mode_t mflag = (S_IRUSR | S_IRGRP | S_IROTH
446 | S_IWUSR);
447
448 int
449 main(int argc, char *argv[])
450 {
451 int i;
452 int j;
453 int c;
454
455 #ifdef unix
456 umask(umask(S_IWGRP | S_IWOTH) | (S_IWGRP | S_IWOTH));
457 #endif /* defined unix */
458 #if HAVE_GETTEXT - 0
459 setlocale(LC_MESSAGES, "");
460 #ifdef TZ_DOMAINDIR
461 bindtextdomain(TZ_DOMAIN, TZ_DOMAINDIR);
462 #endif /* defined TEXTDOMAINDIR */
463 textdomain(TZ_DOMAIN);
464 #endif /* HAVE_GETTEXT - 0 */
465 while ((c = getopt(argc, argv, "Dd:g:l:m:p:L:u:vsy:")) != -1)
466 switch (c) {
467 default:
468 usage();
469 case 'D':
470 Dflag = 1;
471 break;
472 case 'd':
473 if (directory == NULL)
474 directory = optarg;
475 else
476 errx(EXIT_FAILURE,
477 _("more than one -d option specified"));
478 break;
479 case 'g':
480 setgroup(&gflag, optarg);
481 break;
482 case 'l':
483 if (lcltime == NULL)
484 lcltime = optarg;
485 else
486 errx(EXIT_FAILURE,
487 _("more than one -l option specified"));
488 break;
489 case 'm':
490 {
491 void *set = setmode(optarg);
492 getmode(set, mflag);
493 break;
494 }
495 case 'p':
496 if (psxrules == NULL)
497 psxrules = optarg;
498 else
499 errx(EXIT_FAILURE,
500 _("more than one -p option specified"));
501 break;
502 case 'u':
503 setuser(&uflag, optarg);
504 break;
505 case 'y':
506 if (yitcommand == NULL)
507 yitcommand = optarg;
508 else
509 errx(EXIT_FAILURE,
510 _("more than one -y option specified"));
511 break;
512 case 'L':
513 if (leapsec == NULL)
514 leapsec = optarg;
515 else
516 errx(EXIT_FAILURE,
517 _("more than one -L option specified"));
518 break;
519 case 'v':
520 noise = TRUE;
521 break;
522 case 's':
523 sflag = TRUE;
524 break;
525 }
526 if (optind == argc - 1 && strcmp(argv[optind], "=") == 0)
527 usage(); /* usage message by request */
528 if (directory == NULL)
529 directory = TZDIR;
530 if (yitcommand == NULL)
531 yitcommand = "yearistype";
532
533 setboundaries();
534
535 if (optind < argc && leapsec != NULL) {
536 infile(leapsec);
537 adjleap();
538 }
539
540 for (i = optind; i < argc; ++i)
541 infile(argv[i]);
542 if (errors)
543 exit(EXIT_FAILURE);
544 associate();
545 for (i = 0; i < nzones; i = j) {
546 /*
547 ** Find the next non-continuation zone entry.
548 */
549 for (j = i + 1; j < nzones && zones[j].z_name == NULL; ++j)
550 continue;
551 outzone(&zones[i], j - i);
552 }
553 /*
554 ** Make links.
555 */
556 for (i = 0; i < nlinks; ++i)
557 dolink(links[i].l_from, links[i].l_to);
558 if (lcltime != NULL)
559 dolink(lcltime, TZDEFAULT);
560 if (psxrules != NULL)
561 dolink(psxrules, TZDEFRULES);
562 return (errors == 0) ? EXIT_SUCCESS : EXIT_FAILURE;
563 }
564
565 static void
566 dolink(const char * const fromfile, const char * const tofile)
567 {
568 char *fromname;
569 char *toname;
570
571 if (fromfile[0] == '/')
572 fromname = ecpyalloc(fromfile);
573 else {
574 fromname = ecpyalloc(directory);
575 fromname = ecatalloc(fromname, "/");
576 fromname = ecatalloc(fromname, fromfile);
577 }
578 if (tofile[0] == '/')
579 toname = ecpyalloc(tofile);
580 else {
581 toname = ecpyalloc(directory);
582 toname = ecatalloc(toname, "/");
583 toname = ecatalloc(toname, tofile);
584 }
585 /*
586 ** We get to be careful here since
587 ** there's a fair chance of root running us.
588 */
589 if (!itsdir(toname))
590 remove(toname);
591 if (link(fromname, toname) != 0) {
592 int result;
593
594 if (mkdirs(toname) != 0)
595 exit(EXIT_FAILURE);
596 result = link(fromname, toname);
597 #if (HAVE_SYMLINK - 0)
598 if (result != 0) {
599 result = symlink(fromname, toname);
600 if (result == 0)
601 warning(_("hard link failed, symbolic link used"));
602 }
603 #endif
604 if (result != 0) {
605 err(EXIT_FAILURE, _("can't link from %s to %s"),
606 fromname, toname);
607 }
608 }
609 ifree(fromname);
610 ifree(toname);
611 }
612
613 #ifndef INT_MAX
614 #define INT_MAX ((int) (((unsigned)~0)>>1))
615 #endif /* !defined INT_MAX */
616
617 #ifndef INT_MIN
618 #define INT_MIN ((int) ~(((unsigned)~0)>>1))
619 #endif /* !defined INT_MIN */
620
621 /*
622 ** The tz file format currently allows at most 32-bit quantities.
623 ** This restriction should be removed before signed 32-bit values
624 ** wrap around in 2038, but unfortunately this will require a
625 ** change to the tz file format.
626 */
627
628 #define MAX_BITS_IN_FILE 32
629 #define TIME_T_BITS_IN_FILE ((TYPE_BIT(time_t) < MAX_BITS_IN_FILE) ? TYPE_BIT(time_t) : MAX_BITS_IN_FILE)
630
631 static void
632 setboundaries(void)
633 {
634 if (TYPE_SIGNED(time_t)) {
635 min_time = ~ (time_t) 0;
636 min_time <<= TIME_T_BITS_IN_FILE - 1;
637 max_time = ~ (time_t) 0 - min_time;
638 if (sflag)
639 min_time = 0;
640 } else {
641 min_time = 0;
642 max_time = 2 - sflag;
643 max_time <<= TIME_T_BITS_IN_FILE - 1;
644 --max_time;
645 }
646 min_year = TM_YEAR_BASE + gmtime(&min_time)->tm_year;
647 max_year = TM_YEAR_BASE + gmtime(&max_time)->tm_year;
648 min_year_representable = min_year;
649 max_year_representable = max_year;
650 }
651
652 static int
653 itsdir(const char * const name)
654 {
655 char * myname;
656 int accres;
657
658 myname = ecpyalloc(name);
659 myname = ecatalloc(myname, "/.");
660 accres = access(myname, F_OK);
661 ifree(myname);
662 return accres == 0;
663 }
664
665 /*
666 ** Associate sets of rules with zones.
667 */
668
669 /*
670 ** Sort by rule name.
671 */
672
673 static int
674 rcomp(const void *cp1, const void *cp2)
675 {
676 return strcmp(((const struct rule *) cp1)->r_name,
677 ((const struct rule *) cp2)->r_name);
678 }
679
680 static void
681 associate(void)
682 {
683 struct zone *zp;
684 struct rule *rp;
685 int base, out;
686 int i, j;
687
688 if (nrules != 0) {
689 qsort((void *) rules, (size_t) nrules,
690 (size_t) sizeof *rules, rcomp);
691 for (i = 0; i < nrules - 1; ++i) {
692 if (strcmp(rules[i].r_name,
693 rules[i + 1].r_name) != 0)
694 continue;
695 if (strcmp(rules[i].r_filename,
696 rules[i + 1].r_filename) == 0)
697 continue;
698 eat(rules[i].r_filename, rules[i].r_linenum);
699 warning(_("same rule name in multiple files"));
700 eat(rules[i + 1].r_filename, rules[i + 1].r_linenum);
701 warning(_("same rule name in multiple files"));
702 for (j = i + 2; j < nrules; ++j) {
703 if (strcmp(rules[i].r_name,
704 rules[j].r_name) != 0)
705 break;
706 if (strcmp(rules[i].r_filename,
707 rules[j].r_filename) == 0)
708 continue;
709 if (strcmp(rules[i + 1].r_filename,
710 rules[j].r_filename) == 0)
711 continue;
712 break;
713 }
714 i = j - 1;
715 }
716 }
717 for (i = 0; i < nzones; ++i) {
718 zp = &zones[i];
719 zp->z_rules = NULL;
720 zp->z_nrules = 0;
721 }
722 for (base = 0; base < nrules; base = out) {
723 rp = &rules[base];
724 for (out = base + 1; out < nrules; ++out)
725 if (strcmp(rp->r_name, rules[out].r_name) != 0)
726 break;
727 for (i = 0; i < nzones; ++i) {
728 zp = &zones[i];
729 if (strcmp(zp->z_rule, rp->r_name) != 0)
730 continue;
731 zp->z_rules = rp;
732 zp->z_nrules = out - base;
733 }
734 }
735 for (i = 0; i < nzones; ++i) {
736 zp = &zones[i];
737 if (zp->z_nrules == 0) {
738 /*
739 ** Maybe we have a local standard time offset.
740 */
741 eat(zp->z_filename, zp->z_linenum);
742 zp->z_stdoff = gethms(zp->z_rule, _("unruly zone"),
743 TRUE);
744 /*
745 ** Note, though, that if there's no rule,
746 ** a '%s' in the format is a bad thing.
747 */
748 if (strchr(zp->z_format, '%') != 0)
749 error(_("%s in ruleless zone"));
750 }
751 }
752 if (errors)
753 exit(EXIT_FAILURE);
754 }
755
756 static void
757 infile(const char *name)
758 {
759 FILE *fp;
760 char **fields;
761 char *cp;
762 const struct lookup *lp;
763 int nfields;
764 int wantcont;
765 int num;
766 char buf[BUFSIZ];
767
768 if (strcmp(name, "-") == 0) {
769 name = _("standard input");
770 fp = stdin;
771 } else if ((fp = fopen(name, "r")) == NULL)
772 err(EXIT_FAILURE, _("can't open %s"), name);
773 wantcont = FALSE;
774 for (num = 1; ; ++num) {
775 eat(name, num);
776 if (fgets(buf, (int) sizeof buf, fp) != buf)
777 break;
778 cp = strchr(buf, '\n');
779 if (cp == NULL) {
780 error(_("line too long"));
781 exit(EXIT_FAILURE);
782 }
783 *cp = '\0';
784 fields = getfields(buf);
785 nfields = 0;
786 while (fields[nfields] != NULL) {
787 static char nada;
788
789 if (strcmp(fields[nfields], "-") == 0)
790 fields[nfields] = &nada;
791 ++nfields;
792 }
793 if (nfields == 0) {
794 /* nothing to do */
795 } else if (wantcont) {
796 wantcont = inzcont(fields, nfields);
797 } else {
798 lp = byword(fields[0], line_codes);
799 if (lp == NULL)
800 error(_("input line of unknown type"));
801 else switch ((int) (lp->l_value)) {
802 case LC_RULE:
803 inrule(fields, nfields);
804 wantcont = FALSE;
805 break;
806 case LC_ZONE:
807 wantcont = inzone(fields, nfields);
808 break;
809 case LC_LINK:
810 inlink(fields, nfields);
811 wantcont = FALSE;
812 break;
813 case LC_LEAP:
814 if (name != leapsec)
815 warnx(
816 _("leap line in non leap seconds file %s"), name);
817 else inleap(fields, nfields);
818 wantcont = FALSE;
819 break;
820 default: /* "cannot happen" */
821 errx(EXIT_FAILURE,
822 _("panic: invalid l_value %d"), lp->l_value);
823 }
824 }
825 ifree((char *) fields);
826 }
827 if (ferror(fp))
828 errx(EXIT_FAILURE, _("error reading %s"), filename);
829 if (fp != stdin && fclose(fp))
830 err(EXIT_FAILURE, _("error closing %s"), filename);
831 if (wantcont)
832 error(_("expected continuation line not found"));
833 }
834
835 /*
836 ** Convert a string of one of the forms
837 ** h -h hh:mm -hh:mm hh:mm:ss -hh:mm:ss
838 ** into a number of seconds.
839 ** A null string maps to zero.
840 ** Call error with errstring and return zero on errors.
841 */
842
843 static long
844 gethms(const char *string, const char * const errstring, const int signable)
845 {
846 int hh, mm, ss, sign;
847
848 if (string == NULL || *string == '\0')
849 return 0;
850 if (!signable)
851 sign = 1;
852 else if (*string == '-') {
853 sign = -1;
854 ++string;
855 } else sign = 1;
856 if (sscanf(string, scheck(string, "%d"), &hh) == 1)
857 mm = ss = 0;
858 else if (sscanf(string, scheck(string, "%d:%d"), &hh, &mm) == 2)
859 ss = 0;
860 else if (sscanf(string, scheck(string, "%d:%d:%d"),
861 &hh, &mm, &ss) != 3) {
862 error(errstring);
863 return 0;
864 }
865 if ((hh < 0 || hh >= HOURSPERDAY ||
866 mm < 0 || mm >= MINSPERHOUR ||
867 ss < 0 || ss > SECSPERMIN) &&
868 !(hh == HOURSPERDAY && mm == 0 && ss == 0)) {
869 error(errstring);
870 return 0;
871 }
872 return eitol(sign) *
873 (eitol(hh * MINSPERHOUR + mm) *
874 eitol(SECSPERMIN) + eitol(ss));
875 }
876
877 static void
878 inrule(char ** const fields, const int nfields)
879 {
880 static struct rule r;
881
882 if (nfields != RULE_FIELDS) {
883 error(_("wrong number of fields on Rule line"));
884 return;
885 }
886 if (*fields[RF_NAME] == '\0') {
887 error(_("nameless rule"));
888 return;
889 }
890 r.r_filename = filename;
891 r.r_linenum = linenum;
892 r.r_stdoff = gethms(fields[RF_STDOFF], _("invalid saved time"), TRUE);
893 rulesub(&r, fields[RF_LOYEAR], fields[RF_HIYEAR], fields[RF_COMMAND],
894 fields[RF_MONTH], fields[RF_DAY], fields[RF_TOD]);
895 r.r_name = ecpyalloc(fields[RF_NAME]);
896 r.r_abbrvar = ecpyalloc(fields[RF_ABBRVAR]);
897 rules = (struct rule *) (void *) erealloc((char *) rules,
898 (int) ((nrules + 1) * sizeof *rules));
899 rules[nrules++] = r;
900 }
901
902 static int
903 inzone(char ** const fields, const int nfields)
904 {
905 int i;
906 static char *buf;
907
908 if (nfields < ZONE_MINFIELDS || nfields > ZONE_MAXFIELDS) {
909 error(_("wrong number of fields on Zone line"));
910 return FALSE;
911 }
912 if (strcmp(fields[ZF_NAME], TZDEFAULT) == 0 && lcltime != NULL) {
913 buf = erealloc(buf, (int) (132 + strlen(TZDEFAULT)));
914 sprintf(buf,
915 _("\"Zone %s\" line and -l option are mutually exclusive"),
916 TZDEFAULT);
917 error(buf);
918 return FALSE;
919 }
920 if (strcmp(fields[ZF_NAME], TZDEFRULES) == 0 && psxrules != NULL) {
921 buf = erealloc(buf, (int) (132 + strlen(TZDEFRULES)));
922 sprintf(buf,
923 _("\"Zone %s\" line and -p option are mutually exclusive"),
924 TZDEFRULES);
925 error(buf);
926 return FALSE;
927 }
928 for (i = 0; i < nzones; ++i)
929 if (zones[i].z_name != NULL &&
930 strcmp(zones[i].z_name, fields[ZF_NAME]) == 0) {
931 buf = erealloc(buf, (int) (132 +
932 strlen(fields[ZF_NAME]) +
933 strlen(zones[i].z_filename)));
934 sprintf(buf,
935 _("duplicate zone name %s (file \"%s\", line %d)"),
936 fields[ZF_NAME],
937 zones[i].z_filename,
938 zones[i].z_linenum);
939 error(buf);
940 return FALSE;
941 }
942 return inzsub(fields, nfields, FALSE);
943 }
944
945 static int
946 inzcont(char ** const fields, const int nfields)
947 {
948 if (nfields < ZONEC_MINFIELDS || nfields > ZONEC_MAXFIELDS) {
949 error(_("wrong number of fields on Zone continuation line"));
950 return FALSE;
951 }
952 return inzsub(fields, nfields, TRUE);
953 }
954
955 static int
956 inzsub(char ** const fields, const int nfields, const int iscont)
957 {
958 char *cp;
959 static struct zone z;
960 int i_gmtoff, i_rule, i_format;
961 int i_untilyear, i_untilmonth;
962 int i_untilday, i_untiltime;
963 int hasuntil;
964
965 if (iscont) {
966 i_gmtoff = ZFC_GMTOFF;
967 i_rule = ZFC_RULE;
968 i_format = ZFC_FORMAT;
969 i_untilyear = ZFC_TILYEAR;
970 i_untilmonth = ZFC_TILMONTH;
971 i_untilday = ZFC_TILDAY;
972 i_untiltime = ZFC_TILTIME;
973 z.z_name = NULL;
974 } else {
975 i_gmtoff = ZF_GMTOFF;
976 i_rule = ZF_RULE;
977 i_format = ZF_FORMAT;
978 i_untilyear = ZF_TILYEAR;
979 i_untilmonth = ZF_TILMONTH;
980 i_untilday = ZF_TILDAY;
981 i_untiltime = ZF_TILTIME;
982 z.z_name = ecpyalloc(fields[ZF_NAME]);
983 }
984 z.z_filename = filename;
985 z.z_linenum = linenum;
986 z.z_gmtoff = gethms(fields[i_gmtoff], _("invalid UTC offset"), TRUE);
987 if ((cp = strchr(fields[i_format], '%')) != 0) {
988 if (*++cp != 's' || strchr(cp, '%') != 0) {
989 error(_("invalid abbreviation format"));
990 return FALSE;
991 }
992 }
993 z.z_rule = ecpyalloc(fields[i_rule]);
994 z.z_format = ecpyalloc(fields[i_format]);
995 hasuntil = nfields > i_untilyear;
996 if (hasuntil) {
997 z.z_untilrule.r_filename = filename;
998 z.z_untilrule.r_linenum = linenum;
999 rulesub(&z.z_untilrule,
1000 fields[i_untilyear],
1001 "only",
1002 "",
1003 (nfields > i_untilmonth) ?
1004 fields[i_untilmonth] : "Jan",
1005 (nfields > i_untilday) ? fields[i_untilday] : "1",
1006 (nfields > i_untiltime) ? fields[i_untiltime] : "0");
1007 z.z_untiltime = rpytime(&z.z_untilrule,
1008 z.z_untilrule.r_loyear);
1009 if (iscont && nzones > 0 &&
1010 z.z_untiltime > min_time &&
1011 z.z_untiltime < max_time &&
1012 zones[nzones - 1].z_untiltime > min_time &&
1013 zones[nzones - 1].z_untiltime < max_time &&
1014 zones[nzones - 1].z_untiltime >= z.z_untiltime) {
1015 error(_("Zone continuation line end time is not after end time of previous line"));
1016 return FALSE;
1017 }
1018 }
1019 zones = (struct zone *) (void *) erealloc((char *) zones,
1020 (int) ((nzones + 1) * sizeof *zones));
1021 zones[nzones++] = z;
1022 /*
1023 ** If there was an UNTIL field on this line,
1024 ** there's more information about the zone on the next line.
1025 */
1026 return hasuntil;
1027 }
1028
1029 static void
1030 inleap(char ** const fields, const int nfields)
1031 {
1032 const char *cp;
1033 const struct lookup *lp;
1034 int i, j;
1035 int year, month, day;
1036 long dayoff, tod;
1037 time_t t;
1038
1039 if (nfields != LEAP_FIELDS) {
1040 error(_("wrong number of fields on Leap line"));
1041 return;
1042 }
1043 dayoff = 0;
1044 cp = fields[LP_YEAR];
1045 if (sscanf(cp, scheck(cp, "%d"), &year) != 1) {
1046 /*
1047 * Leapin' Lizards!
1048 */
1049 error(_("invalid leaping year"));
1050 return;
1051 }
1052 j = EPOCH_YEAR;
1053 while (j != year) {
1054 if (year > j) {
1055 i = len_years[isleap(j)];
1056 ++j;
1057 } else {
1058 --j;
1059 i = -len_years[isleap(j)];
1060 }
1061 dayoff = oadd(dayoff, eitol(i));
1062 }
1063 if ((lp = byword(fields[LP_MONTH], mon_names)) == NULL) {
1064 error(_("invalid month name"));
1065 return;
1066 }
1067 month = lp->l_value;
1068 j = TM_JANUARY;
1069 while (j != month) {
1070 i = len_months[isleap(year)][j];
1071 dayoff = oadd(dayoff, eitol(i));
1072 ++j;
1073 }
1074 cp = fields[LP_DAY];
1075 if (sscanf(cp, scheck(cp, "%d"), &day) != 1 ||
1076 day <= 0 || day > len_months[isleap(year)][month]) {
1077 error(_("invalid day of month"));
1078 return;
1079 }
1080 dayoff = oadd(dayoff, eitol(day - 1));
1081 if (dayoff < 0 && !TYPE_SIGNED(time_t)) {
1082 error(_("time before zero"));
1083 return;
1084 }
1085 t = (time_t) dayoff * SECSPERDAY;
1086 /*
1087 ** Cheap overflow check.
1088 */
1089 if (t / SECSPERDAY != dayoff) {
1090 error(_("time overflow"));
1091 return;
1092 }
1093 tod = gethms(fields[LP_TIME], _("invalid time of day"), FALSE);
1094 cp = fields[LP_CORR];
1095 {
1096 int positive;
1097 int count;
1098
1099 if (strcmp(cp, "") == 0) { /* infile() turns "-" into "" */
1100 positive = FALSE;
1101 count = 1;
1102 } else if (strcmp(cp, "--") == 0) {
1103 positive = FALSE;
1104 count = 2;
1105 } else if (strcmp(cp, "+") == 0) {
1106 positive = TRUE;
1107 count = 1;
1108 } else if (strcmp(cp, "++") == 0) {
1109 positive = TRUE;
1110 count = 2;
1111 } else {
1112 error(_("illegal CORRECTION field on Leap line"));
1113 return;
1114 }
1115 if ((lp = byword(fields[LP_ROLL], leap_types)) == NULL) {
1116 error(_("illegal Rolling/Stationary field on Leap line"));
1117 return;
1118 }
1119 leapadd(tadd(t, tod), positive, lp->l_value, count);
1120 }
1121 }
1122
1123 static void
1124 inlink(char ** const fields, const int nfields)
1125 {
1126 struct link l;
1127
1128 if (nfields != LINK_FIELDS) {
1129 error(_("wrong number of fields on Link line"));
1130 return;
1131 }
1132 if (*fields[LF_FROM] == '\0') {
1133 error(_("blank FROM field on Link line"));
1134 return;
1135 }
1136 if (*fields[LF_TO] == '\0') {
1137 error(_("blank TO field on Link line"));
1138 return;
1139 }
1140 l.l_filename = filename;
1141 l.l_linenum = linenum;
1142 l.l_from = ecpyalloc(fields[LF_FROM]);
1143 l.l_to = ecpyalloc(fields[LF_TO]);
1144 links = (struct link *) (void *) erealloc((char *) links,
1145 (int) ((nlinks + 1) * sizeof *links));
1146 links[nlinks++] = l;
1147 }
1148
1149 static void
1150 rulesub(struct rule * const rp,
1151 const char * const loyearp,
1152 const char * const hiyearp,
1153 const char * const typep,
1154 const char * const monthp,
1155 const char * const dayp,
1156 const char * const timep)
1157 {
1158 const struct lookup *lp;
1159 const char *cp;
1160 char *dp;
1161 char *ep;
1162
1163 if ((lp = byword(monthp, mon_names)) == NULL) {
1164 error(_("invalid month name"));
1165 return;
1166 }
1167 rp->r_month = lp->l_value;
1168 rp->r_todisstd = FALSE;
1169 rp->r_todisgmt = FALSE;
1170 dp = ecpyalloc(timep);
1171 if (*dp != '\0') {
1172 ep = dp + strlen(dp) - 1;
1173 switch (lowerit(*ep)) {
1174 case 's': /* Standard */
1175 rp->r_todisstd = TRUE;
1176 rp->r_todisgmt = FALSE;
1177 *ep = '\0';
1178 break;
1179 case 'w': /* Wall */
1180 rp->r_todisstd = FALSE;
1181 rp->r_todisgmt = FALSE;
1182 *ep = '\0';
1183 break;
1184 case 'g': /* Greenwich */
1185 case 'u': /* Universal */
1186 case 'z': /* Zulu */
1187 rp->r_todisstd = TRUE;
1188 rp->r_todisgmt = TRUE;
1189 *ep = '\0';
1190 break;
1191 }
1192 }
1193 rp->r_tod = gethms(dp, _("invalid time of day"), FALSE);
1194 ifree(dp);
1195 /*
1196 ** Year work.
1197 */
1198 cp = loyearp;
1199 lp = byword(cp, begin_years);
1200 if (lp != NULL) switch ((int) lp->l_value) {
1201 case YR_MINIMUM:
1202 rp->r_loyear = INT_MIN;
1203 break;
1204 case YR_MAXIMUM:
1205 rp->r_loyear = INT_MAX;
1206 break;
1207 default: /* "cannot happen" */
1208 errx(EXIT_FAILURE,
1209 _("panic: invalid l_value %d"), lp->l_value);
1210 } else if (sscanf(cp, scheck(cp, "%d"), &rp->r_loyear) != 1) {
1211 error(_("invalid starting year"));
1212 return;
1213 } else if (noise) {
1214 if (rp->r_loyear < min_year_representable)
1215 warning(_("starting year too low to be represented"));
1216 else if (rp->r_loyear > max_year_representable)
1217 warning(_("starting year too high to be represented"));
1218 }
1219 cp = hiyearp;
1220 if ((lp = byword(cp, end_years)) != NULL) switch ((int) lp->l_value) {
1221 case YR_MINIMUM:
1222 rp->r_hiyear = INT_MIN;
1223 break;
1224 case YR_MAXIMUM:
1225 rp->r_hiyear = INT_MAX;
1226 break;
1227 case YR_ONLY:
1228 rp->r_hiyear = rp->r_loyear;
1229 break;
1230 default: /* "cannot happen" */
1231 errx(EXIT_FAILURE,
1232 _("panic: invalid l_value %d"), lp->l_value);
1233 } else if (sscanf(cp, scheck(cp, "%d"), &rp->r_hiyear) != 1) {
1234 error(_("invalid ending year"));
1235 return;
1236 } else if (noise) {
1237 if (rp->r_loyear < min_year_representable)
1238 warning(_("starting year too low to be represented"));
1239 else if (rp->r_loyear > max_year_representable)
1240 warning(_("starting year too high to be represented"));
1241 }
1242 if (rp->r_loyear > rp->r_hiyear) {
1243 error(_("starting year greater than ending year"));
1244 return;
1245 }
1246 if (*typep == '\0')
1247 rp->r_yrtype = NULL;
1248 else {
1249 if (rp->r_loyear == rp->r_hiyear) {
1250 error(_("typed single year"));
1251 return;
1252 }
1253 rp->r_yrtype = ecpyalloc(typep);
1254 }
1255 if (rp->r_loyear < min_year && rp->r_loyear > 0)
1256 min_year = rp->r_loyear;
1257 /*
1258 ** Day work.
1259 ** Accept things such as:
1260 ** 1
1261 ** last-Sunday
1262 ** Sun<=20
1263 ** Sun>=7
1264 */
1265 dp = ecpyalloc(dayp);
1266 if ((lp = byword(dp, lasts)) != NULL) {
1267 rp->r_dycode = DC_DOWLEQ;
1268 rp->r_wday = lp->l_value;
1269 rp->r_dayofmonth = len_months[1][rp->r_month];
1270 } else {
1271 if ((ep = strchr(dp, '<')) != 0)
1272 rp->r_dycode = DC_DOWLEQ;
1273 else if ((ep = strchr(dp, '>')) != 0)
1274 rp->r_dycode = DC_DOWGEQ;
1275 else {
1276 ep = dp;
1277 rp->r_dycode = DC_DOM;
1278 }
1279 if (rp->r_dycode != DC_DOM) {
1280 *ep++ = 0;
1281 if (*ep++ != '=') {
1282 error(_("invalid day of month"));
1283 ifree(dp);
1284 return;
1285 }
1286 if ((lp = byword(dp, wday_names)) == NULL) {
1287 error(_("invalid weekday name"));
1288 ifree(dp);
1289 return;
1290 }
1291 rp->r_wday = lp->l_value;
1292 }
1293 if (sscanf(ep, scheck(ep, "%d"), &rp->r_dayofmonth) != 1 ||
1294 rp->r_dayofmonth <= 0 ||
1295 (rp->r_dayofmonth > len_months[1][rp->r_month])) {
1296 error(_("invalid day of month"));
1297 ifree(dp);
1298 return;
1299 }
1300 }
1301 ifree(dp);
1302 }
1303
1304 static void
1305 convert(const long val, char * const buf)
1306 {
1307 int i;
1308 long shift;
1309
1310 for (i = 0, shift = 24; i < 4; ++i, shift -= 8)
1311 buf[i] = val >> shift;
1312 }
1313
1314 static void
1315 puttzcode(const long val, FILE * const fp)
1316 {
1317 char buf[4];
1318
1319 convert(val, buf);
1320 fwrite((void *) buf, (size_t) sizeof buf, (size_t) 1, fp);
1321 }
1322
1323 static int
1324 atcomp(const void *avp, const void *bvp)
1325 {
1326 const struct attype *ap = avp;
1327 const struct attype *bp = bvp;
1328
1329 if (ap->at < bp->at)
1330 return -1;
1331 else if (ap->at > bp->at)
1332 return 1;
1333 else return 0;
1334 }
1335
1336 static void
1337 writezone(const char * const name)
1338 {
1339 FILE * fp;
1340 int i, j;
1341 static char *fullname;
1342 static struct tzhead tzh;
1343 time_t ats[TZ_MAX_TIMES];
1344 unsigned char types[TZ_MAX_TIMES];
1345
1346 /*
1347 ** Sort.
1348 */
1349 if (timecnt > 1)
1350 qsort((void *) attypes, (size_t) timecnt,
1351 (size_t) sizeof *attypes, atcomp);
1352 /*
1353 ** Optimize.
1354 */
1355 {
1356 int fromi;
1357 int toi;
1358
1359 toi = 0;
1360 fromi = 0;
1361 while (fromi < timecnt && attypes[fromi].at < min_time)
1362 ++fromi;
1363 if (isdsts[0] == 0)
1364 while (fromi < timecnt && attypes[fromi].type == 0)
1365 ++fromi; /* handled by default rule */
1366 for ( ; fromi < timecnt; ++fromi) {
1367 if (toi != 0
1368 && ((attypes[fromi].at
1369 + gmtoffs[attypes[toi - 1].type])
1370 <= (attypes[toi - 1].at
1371 + gmtoffs[toi == 1 ? 0
1372 : attypes[toi - 2].type]))) {
1373 attypes[toi - 1].type = attypes[fromi].type;
1374 continue;
1375 }
1376 if (toi == 0 ||
1377 attypes[toi - 1].type != attypes[fromi].type)
1378 attypes[toi++] = attypes[fromi];
1379 }
1380 timecnt = toi;
1381 }
1382 /*
1383 ** Transfer.
1384 */
1385 for (i = 0; i < timecnt; ++i) {
1386 ats[i] = attypes[i].at;
1387 types[i] = attypes[i].type;
1388 }
1389 fullname = erealloc(fullname,
1390 (int) (strlen(directory) + 1 + strlen(name) + 1));
1391 sprintf(fullname, "%s/%s", directory, name);
1392
1393 /*
1394 * Remove old file, if any, to snap links.
1395 */
1396 if (!itsdir(fullname) && remove(fullname) != 0 && errno != ENOENT)
1397 err(EXIT_FAILURE, _("can't remove %s"), fullname);
1398
1399 if ((fp = fopen(fullname, "wb")) == NULL) {
1400 if (mkdirs(fullname) != 0)
1401 exit(EXIT_FAILURE);
1402 if ((fp = fopen(fullname, "wb")) == NULL)
1403 err(EXIT_FAILURE, _("can't create %s"), fullname);
1404 }
1405 convert(eitol(typecnt), tzh.tzh_ttisgmtcnt);
1406 convert(eitol(typecnt), tzh.tzh_ttisstdcnt);
1407 convert(eitol(leapcnt), tzh.tzh_leapcnt);
1408 convert(eitol(timecnt), tzh.tzh_timecnt);
1409 convert(eitol(typecnt), tzh.tzh_typecnt);
1410 convert(eitol(charcnt), tzh.tzh_charcnt);
1411 strncpy(tzh.tzh_magic, TZ_MAGIC, sizeof tzh.tzh_magic);
1412 #define DO(field) fwrite((void *) tzh.field, (size_t) sizeof tzh.field, (size_t) 1, fp)
1413 DO(tzh_magic);
1414 DO(tzh_reserved);
1415 DO(tzh_ttisgmtcnt);
1416 DO(tzh_ttisstdcnt);
1417 DO(tzh_leapcnt);
1418 DO(tzh_timecnt);
1419 DO(tzh_typecnt);
1420 DO(tzh_charcnt);
1421 #undef DO
1422 for (i = 0; i < timecnt; ++i) {
1423 j = leapcnt;
1424 while (--j >= 0)
1425 if (ats[i] >= trans[j]) {
1426 ats[i] = tadd(ats[i], corr[j]);
1427 break;
1428 }
1429 puttzcode((long) ats[i], fp);
1430 }
1431 if (timecnt > 0)
1432 fwrite((void *) types, (size_t) sizeof types[0],
1433 (size_t) timecnt, fp);
1434 for (i = 0; i < typecnt; ++i) {
1435 puttzcode((long) gmtoffs[i], fp);
1436 putc(isdsts[i], fp);
1437 putc(abbrinds[i], fp);
1438 }
1439 if (charcnt != 0)
1440 fwrite((void *) chars, (size_t) sizeof chars[0],
1441 (size_t) charcnt, fp);
1442 for (i = 0; i < leapcnt; ++i) {
1443 if (roll[i]) {
1444 if (timecnt == 0 || trans[i] < ats[0]) {
1445 j = 0;
1446 while (isdsts[j])
1447 if (++j >= typecnt) {
1448 j = 0;
1449 break;
1450 }
1451 } else {
1452 j = 1;
1453 while (j < timecnt && trans[i] >= ats[j])
1454 ++j;
1455 j = types[j - 1];
1456 }
1457 puttzcode((long) tadd(trans[i], -gmtoffs[j]), fp);
1458 } else puttzcode((long) trans[i], fp);
1459 puttzcode((long) corr[i], fp);
1460 }
1461 for (i = 0; i < typecnt; ++i)
1462 putc(ttisstds[i], fp);
1463 for (i = 0; i < typecnt; ++i)
1464 putc(ttisgmts[i], fp);
1465 if (ferror(fp) || fclose(fp))
1466 errx(EXIT_FAILURE, _("error writing %s"), fullname);
1467 if (chmod(fullname, mflag) < 0)
1468 err(EXIT_FAILURE, _("cannot change mode of %s to %03o"),
1469 fullname, (unsigned)mflag);
1470 if ((uflag != (uid_t)-1 || gflag != (gid_t)-1)
1471 && chown(fullname, uflag, gflag) < 0)
1472 err(EXIT_FAILURE, _("cannot change ownership of %s"),
1473 fullname);
1474 }
1475
1476 static void
1477 doabbr(char * const abbr, const char * const format,
1478 const char * const letters, const int isdst)
1479 {
1480 if (strchr(format, '/') == NULL) {
1481 if (letters == NULL)
1482 strcpy(abbr, format);
1483 else sprintf(abbr, format, letters);
1484 } else if (isdst)
1485 strcpy(abbr, strchr(format, '/') + 1);
1486 else {
1487 strcpy(abbr, format);
1488 *strchr(abbr, '/') = '\0';
1489 }
1490 }
1491
1492 static void
1493 outzone(const struct zone * const zpfirst, const int zonecount)
1494 {
1495 const struct zone *zp;
1496 struct rule *rp;
1497 int i, j;
1498 int usestart, useuntil;
1499 time_t starttime, untiltime;
1500 long gmtoff;
1501 long stdoff;
1502 int year;
1503 long startoff;
1504 int startttisstd;
1505 int startttisgmt;
1506 int type;
1507 char startbuf[BUFSIZ];
1508
1509 INITIALIZE(untiltime);
1510 INITIALIZE(starttime);
1511 /*
1512 ** Now. . .finally. . .generate some useful data!
1513 */
1514 timecnt = 0;
1515 typecnt = 0;
1516 charcnt = 0;
1517 /*
1518 ** A guess that may well be corrected later.
1519 */
1520 stdoff = 0;
1521 /*
1522 ** Thanks to Earl Chew (earl@dnd.icp.nec.com.au)
1523 ** for noting the need to unconditionally initialize startttisstd.
1524 */
1525 startttisstd = FALSE;
1526 startttisgmt = FALSE;
1527 for (i = 0; i < zonecount; ++i) {
1528 zp = &zpfirst[i];
1529 usestart = i > 0 && (zp - 1)->z_untiltime > min_time;
1530 useuntil = i < (zonecount - 1);
1531 if (useuntil && zp->z_untiltime <= min_time)
1532 continue;
1533 gmtoff = zp->z_gmtoff;
1534 eat(zp->z_filename, zp->z_linenum);
1535 *startbuf = '\0';
1536 startoff = zp->z_gmtoff;
1537 if (zp->z_nrules == 0) {
1538 stdoff = zp->z_stdoff;
1539 doabbr(startbuf, zp->z_format,
1540 (char *) NULL, stdoff != 0);
1541 type = addtype(oadd(zp->z_gmtoff, stdoff),
1542 startbuf, stdoff != 0, startttisstd,
1543 startttisgmt);
1544 if (usestart) {
1545 addtt(starttime, type);
1546 usestart = FALSE;
1547 }
1548 else if (stdoff != 0)
1549 addtt(min_time, type);
1550 } else for (year = min_year; year <= max_year; ++year) {
1551 if (useuntil && year > zp->z_untilrule.r_hiyear)
1552 break;
1553 /*
1554 ** Mark which rules to do in the current year.
1555 ** For those to do, calculate rpytime(rp, year);
1556 */
1557 for (j = 0; j < zp->z_nrules; ++j) {
1558 rp = &zp->z_rules[j];
1559 eats(zp->z_filename, zp->z_linenum,
1560 rp->r_filename, rp->r_linenum);
1561 rp->r_todo = year >= rp->r_loyear &&
1562 year <= rp->r_hiyear &&
1563 yearistype(year, rp->r_yrtype);
1564 if (rp->r_todo)
1565 rp->r_temp = rpytime(rp, year);
1566 }
1567 for ( ; ; ) {
1568 int k;
1569 time_t jtime, ktime;
1570 long offset;
1571 char buf[BUFSIZ];
1572
1573 INITIALIZE(ktime);
1574 if (useuntil) {
1575 /*
1576 ** Turn untiltime into UTC
1577 ** assuming the current gmtoff and
1578 ** stdoff values.
1579 */
1580 untiltime = zp->z_untiltime;
1581 if (!zp->z_untilrule.r_todisgmt)
1582 untiltime = tadd(untiltime,
1583 -gmtoff);
1584 if (!zp->z_untilrule.r_todisstd)
1585 untiltime = tadd(untiltime,
1586 -stdoff);
1587 }
1588 /*
1589 ** Find the rule (of those to do, if any)
1590 ** that takes effect earliest in the year.
1591 */
1592 k = -1;
1593 for (j = 0; j < zp->z_nrules; ++j) {
1594 rp = &zp->z_rules[j];
1595 if (!rp->r_todo)
1596 continue;
1597 eats(zp->z_filename, zp->z_linenum,
1598 rp->r_filename, rp->r_linenum);
1599 offset = rp->r_todisgmt ? 0 : gmtoff;
1600 if (!rp->r_todisstd)
1601 offset = oadd(offset, stdoff);
1602 jtime = rp->r_temp;
1603 if (jtime == min_time ||
1604 jtime == max_time)
1605 continue;
1606 jtime = tadd(jtime, -offset);
1607 if (k < 0 || jtime < ktime) {
1608 k = j;
1609 ktime = jtime;
1610 }
1611 }
1612 if (k < 0)
1613 break; /* go on to next year */
1614 rp = &zp->z_rules[k];
1615 rp->r_todo = FALSE;
1616 if (useuntil && ktime >= untiltime)
1617 break;
1618 stdoff = rp->r_stdoff;
1619 if (usestart && ktime == starttime)
1620 usestart = FALSE;
1621 if (usestart) {
1622 if (ktime < starttime) {
1623 startoff = oadd(zp->z_gmtoff,
1624 stdoff);
1625 doabbr(startbuf, zp->z_format,
1626 rp->r_abbrvar,
1627 rp->r_stdoff != 0);
1628 continue;
1629 }
1630 if (*startbuf == '\0' &&
1631 startoff == oadd(zp->z_gmtoff,
1632 stdoff)) {
1633 doabbr(startbuf, zp->z_format,
1634 rp->r_abbrvar,
1635 rp->r_stdoff != 0);
1636 }
1637 }
1638 eats(zp->z_filename, zp->z_linenum,
1639 rp->r_filename, rp->r_linenum);
1640 doabbr(buf, zp->z_format, rp->r_abbrvar,
1641 rp->r_stdoff != 0);
1642 offset = oadd(zp->z_gmtoff, rp->r_stdoff);
1643 type = addtype(offset, buf, rp->r_stdoff != 0,
1644 rp->r_todisstd, rp->r_todisgmt);
1645 addtt(ktime, type);
1646 }
1647 }
1648 if (usestart) {
1649 if (*startbuf == '\0' &&
1650 zp->z_format != NULL &&
1651 strchr(zp->z_format, '%') == NULL &&
1652 strchr(zp->z_format, '/') == NULL)
1653 strcpy(startbuf, zp->z_format);
1654 eat(zp->z_filename, zp->z_linenum);
1655 if (*startbuf == '\0')
1656 error(_("can't determine time zone abbreviation to use just after until time"));
1657 else addtt(starttime,
1658 addtype(startoff, startbuf,
1659 startoff != zp->z_gmtoff,
1660 startttisstd,
1661 startttisgmt));
1662 }
1663 /*
1664 ** Now we may get to set starttime for the next zone line.
1665 */
1666 if (useuntil) {
1667 startttisstd = zp->z_untilrule.r_todisstd;
1668 startttisgmt = zp->z_untilrule.r_todisgmt;
1669 starttime = zp->z_untiltime;
1670 if (!startttisstd)
1671 starttime = tadd(starttime, -stdoff);
1672 if (!startttisgmt)
1673 starttime = tadd(starttime, -gmtoff);
1674 }
1675 }
1676 writezone(zpfirst->z_name);
1677 }
1678
1679 static void
1680 addtt(const time_t starttime, int type)
1681 {
1682 if (starttime <= min_time ||
1683 (timecnt == 1 && attypes[0].at < min_time)) {
1684 gmtoffs[0] = gmtoffs[type];
1685 isdsts[0] = isdsts[type];
1686 ttisstds[0] = ttisstds[type];
1687 ttisgmts[0] = ttisgmts[type];
1688 if (abbrinds[type] != 0)
1689 strcpy(chars, &chars[abbrinds[type]]);
1690 abbrinds[0] = 0;
1691 charcnt = strlen(chars) + 1;
1692 typecnt = 1;
1693 timecnt = 0;
1694 type = 0;
1695 }
1696 if (timecnt >= TZ_MAX_TIMES) {
1697 error(_("too many transitions?!"));
1698 exit(EXIT_FAILURE);
1699 }
1700 attypes[timecnt].at = starttime;
1701 attypes[timecnt].type = type;
1702 ++timecnt;
1703 }
1704
1705 static int
1706 addtype(const long gmtoff, const char * const abbr, const int isdst,
1707 const int ttisstd, const int ttisgmt)
1708 {
1709 int i, j;
1710
1711 if (isdst != TRUE && isdst != FALSE) {
1712 error(_("internal error - addtype called with bad isdst"));
1713 exit(EXIT_FAILURE);
1714 }
1715 if (ttisstd != TRUE && ttisstd != FALSE) {
1716 error(_("internal error - addtype called with bad ttisstd"));
1717 exit(EXIT_FAILURE);
1718 }
1719 if (ttisgmt != TRUE && ttisgmt != FALSE) {
1720 error(_("internal error - addtype called with bad ttisgmt"));
1721 exit(EXIT_FAILURE);
1722 }
1723 /*
1724 ** See if there's already an entry for this zone type.
1725 ** If so, just return its index.
1726 */
1727 for (i = 0; i < typecnt; ++i) {
1728 if (gmtoff == gmtoffs[i] && isdst == isdsts[i] &&
1729 strcmp(abbr, &chars[abbrinds[i]]) == 0 &&
1730 ttisstd == ttisstds[i] &&
1731 ttisgmt == ttisgmts[i])
1732 return i;
1733 }
1734 /*
1735 ** There isn't one; add a new one, unless there are already too
1736 ** many.
1737 */
1738 if (typecnt >= TZ_MAX_TYPES) {
1739 error(_("too many local time types"));
1740 exit(EXIT_FAILURE);
1741 }
1742 gmtoffs[i] = gmtoff;
1743 isdsts[i] = isdst;
1744 ttisstds[i] = ttisstd;
1745 ttisgmts[i] = ttisgmt;
1746
1747 for (j = 0; j < charcnt; ++j)
1748 if (strcmp(&chars[j], abbr) == 0)
1749 break;
1750 if (j == charcnt)
1751 newabbr(abbr);
1752 abbrinds[i] = j;
1753 ++typecnt;
1754 return i;
1755 }
1756
1757 static void
1758 leapadd(const time_t t, const int positive, const int rolling, int count)
1759 {
1760 int i, j;
1761
1762 if (leapcnt + (positive ? count : 1) > TZ_MAX_LEAPS) {
1763 error(_("too many leap seconds"));
1764 exit(EXIT_FAILURE);
1765 }
1766 for (i = 0; i < leapcnt; ++i)
1767 if (t <= trans[i]) {
1768 if (t == trans[i]) {
1769 error(_("repeated leap second moment"));
1770 exit(EXIT_FAILURE);
1771 }
1772 break;
1773 }
1774 do {
1775 for (j = leapcnt; j > i; --j) {
1776 trans[j] = trans[j - 1];
1777 corr[j] = corr[j - 1];
1778 roll[j] = roll[j - 1];
1779 }
1780 trans[i] = t;
1781 corr[i] = positive ? 1L : eitol(-count);
1782 roll[i] = rolling;
1783 ++leapcnt;
1784 } while (positive && --count != 0);
1785 }
1786
1787 static void
1788 adjleap(void)
1789 {
1790 int i;
1791 long last = 0;
1792
1793 /*
1794 ** propagate leap seconds forward
1795 */
1796 for (i = 0; i < leapcnt; ++i) {
1797 trans[i] = tadd(trans[i], last);
1798 last = corr[i] += last;
1799 }
1800 }
1801
1802 static int
1803 yearistype(const int year, const char * const type)
1804 {
1805 static char * buf;
1806 int result;
1807
1808 if (type == NULL || *type == '\0')
1809 return TRUE;
1810 buf = erealloc(buf, (int) (132 + strlen(yitcommand) + strlen(type)));
1811 sprintf(buf, "%s %d %s", yitcommand, year, type);
1812 result = system(buf);
1813 if (result == 0)
1814 return TRUE;
1815 if (result == (1 << 8))
1816 return FALSE;
1817 error(_("wild result from command execution"));
1818 warnx(_("command was '%s', result was %d"), buf, result);
1819 for ( ; ; )
1820 exit(EXIT_FAILURE);
1821 }
1822
1823 static int
1824 lowerit(int a)
1825 {
1826 a = (unsigned char) a;
1827 return (isascii(a) && isupper(a)) ? tolower(a) : a;
1828 }
1829
1830 static int
1831 ciequal(const char *ap, const char *bp) /* case-insensitive equality */
1832 {
1833 while (lowerit(*ap) == lowerit(*bp++))
1834 if (*ap++ == '\0')
1835 return TRUE;
1836 return FALSE;
1837 }
1838
1839 static int
1840 itsabbr(const char *abbr, const char *word)
1841 {
1842 if (lowerit(*abbr) != lowerit(*word))
1843 return FALSE;
1844 ++word;
1845 while (*++abbr != '\0')
1846 do {
1847 if (*word == '\0')
1848 return FALSE;
1849 } while (lowerit(*word++) != lowerit(*abbr));
1850 return TRUE;
1851 }
1852
1853 static const struct lookup *
1854 byword(const char * const word, const struct lookup * const table)
1855 {
1856 const struct lookup *foundlp;
1857 const struct lookup *lp;
1858
1859 if (word == NULL || table == NULL)
1860 return NULL;
1861 /*
1862 ** Look for exact match.
1863 */
1864 for (lp = table; lp->l_word != NULL; ++lp)
1865 if (ciequal(word, lp->l_word))
1866 return lp;
1867 /*
1868 ** Look for inexact match.
1869 */
1870 foundlp = NULL;
1871 for (lp = table; lp->l_word != NULL; ++lp)
1872 if (itsabbr(word, lp->l_word)) {
1873 if (foundlp == NULL)
1874 foundlp = lp;
1875 else return NULL; /* multiple inexact matches */
1876 }
1877 return foundlp;
1878 }
1879
1880 static char **
1881 getfields(char *cp)
1882 {
1883 char *dp;
1884 char **array;
1885 int nsubs;
1886
1887 if (cp == NULL)
1888 return NULL;
1889 array = (char **) (void *)
1890 emalloc((int) ((strlen(cp) + 1) * sizeof *array));
1891 nsubs = 0;
1892 for ( ; ; ) {
1893 while (isascii(*cp) && isspace((unsigned char) *cp))
1894 ++cp;
1895 if (*cp == '\0' || *cp == '#')
1896 break;
1897 array[nsubs++] = dp = cp;
1898 do {
1899 if ((*dp = *cp++) != '"')
1900 ++dp;
1901 else while ((*dp = *cp++) != '"')
1902 if (*dp != '\0')
1903 ++dp;
1904 else error(_("odd number of quotation marks"));
1905 } while (*cp != '\0' && *cp != '#' &&
1906 (!isascii(*cp) || !isspace((unsigned char) *cp)));
1907 if (isascii(*cp) && isspace((unsigned char) *cp))
1908 ++cp;
1909 *dp = '\0';
1910 }
1911 array[nsubs] = NULL;
1912 return array;
1913 }
1914
1915 static long
1916 oadd(const long t1, const long t2)
1917 {
1918 long t;
1919
1920 t = t1 + t2;
1921 if ((t2 > 0 && t <= t1) || (t2 < 0 && t >= t1)) {
1922 error(_("time overflow"));
1923 exit(EXIT_FAILURE);
1924 }
1925 return t;
1926 }
1927
1928 static time_t
1929 tadd(const time_t t1, const long t2)
1930 {
1931 time_t t;
1932
1933 if (t1 == max_time && t2 > 0)
1934 return max_time;
1935 if (t1 == min_time && t2 < 0)
1936 return min_time;
1937 t = t1 + t2;
1938 if ((t2 > 0 && t <= t1) || (t2 < 0 && t >= t1)) {
1939 error(_("time overflow"));
1940 exit(EXIT_FAILURE);
1941 }
1942 return t;
1943 }
1944
1945 /*
1946 ** Given a rule, and a year, compute the date - in seconds since January 1,
1947 ** 1970, 00:00 LOCAL time - in that year that the rule refers to.
1948 */
1949
1950 static time_t
1951 rpytime(const struct rule * const rp, const int wantedy)
1952 {
1953 int y, m, i;
1954 long dayoff; /* with a nod to Margaret O. */
1955 time_t t;
1956
1957 if (wantedy == INT_MIN)
1958 return min_time;
1959 if (wantedy == INT_MAX)
1960 return max_time;
1961 dayoff = 0;
1962 m = TM_JANUARY;
1963 y = EPOCH_YEAR;
1964 while (wantedy != y) {
1965 if (wantedy > y) {
1966 i = len_years[isleap(y)];
1967 ++y;
1968 } else {
1969 --y;
1970 i = -len_years[isleap(y)];
1971 }
1972 dayoff = oadd(dayoff, eitol(i));
1973 }
1974 while (m != rp->r_month) {
1975 i = len_months[isleap(y)][m];
1976 dayoff = oadd(dayoff, eitol(i));
1977 ++m;
1978 }
1979 i = rp->r_dayofmonth;
1980 if (m == TM_FEBRUARY && i == 29 && !isleap(y)) {
1981 if (rp->r_dycode == DC_DOWLEQ)
1982 --i;
1983 else {
1984 error(_("use of 2/29 in non leap-year"));
1985 exit(EXIT_FAILURE);
1986 }
1987 }
1988 --i;
1989 dayoff = oadd(dayoff, eitol(i));
1990 if (rp->r_dycode == DC_DOWGEQ || rp->r_dycode == DC_DOWLEQ) {
1991 long wday;
1992
1993 #define LDAYSPERWEEK ((long) DAYSPERWEEK)
1994 wday = eitol(EPOCH_WDAY);
1995 /*
1996 ** Don't trust mod of negative numbers.
1997 */
1998 if (dayoff >= 0)
1999 wday = (wday + dayoff) % LDAYSPERWEEK;
2000 else {
2001 wday -= ((-dayoff) % LDAYSPERWEEK);
2002 if (wday < 0)
2003 wday += LDAYSPERWEEK;
2004 }
2005 while (wday != eitol(rp->r_wday))
2006 if (rp->r_dycode == DC_DOWGEQ) {
2007 dayoff = oadd(dayoff, (long) 1);
2008 if (++wday >= LDAYSPERWEEK)
2009 wday = 0;
2010 ++i;
2011 } else {
2012 dayoff = oadd(dayoff, (long) -1);
2013 if (--wday < 0)
2014 wday = LDAYSPERWEEK - 1;
2015 --i;
2016 }
2017 if (i < 0 || i >= len_months[isleap(y)][m]) {
2018 error(_("no day in month matches rule"));
2019 exit(EXIT_FAILURE);
2020 }
2021 }
2022 if (dayoff < 0 && !TYPE_SIGNED(time_t))
2023 return min_time;
2024 t = (time_t) dayoff * SECSPERDAY;
2025 /*
2026 ** Cheap overflow check.
2027 */
2028 if (t / SECSPERDAY != dayoff)
2029 return (dayoff > 0) ? max_time : min_time;
2030 return tadd(t, rp->r_tod);
2031 }
2032
2033 static void
2034 newabbr(const char * const string)
2035 {
2036 int i;
2037
2038 i = strlen(string) + 1;
2039 if (charcnt + i > TZ_MAX_CHARS) {
2040 error(_("too many, or too long, time zone abbreviations"));
2041 exit(EXIT_FAILURE);
2042 }
2043 strcpy(&chars[charcnt], string);
2044 charcnt += eitol(i);
2045 }
2046
2047 static int
2048 mkdirs(char * const argname)
2049 {
2050 char *name;
2051 char *cp;
2052
2053 if (argname == NULL || *argname == '\0' || Dflag)
2054 return 0;
2055 cp = name = ecpyalloc(argname);
2056 while ((cp = strchr(cp + 1, '/')) != 0) {
2057 *cp = '\0';
2058 #ifndef unix
2059 /*
2060 ** DOS drive specifier?
2061 */
2062 if (isalpha((unsigned char) name[0]) &&
2063 name[1] == ':' && name[2] == '\0') {
2064 *cp = '/';
2065 continue;
2066 }
2067 #endif /* !defined unix */
2068 if (!itsdir(name)) {
2069 /*
2070 ** It doesn't seem to exist, so we try to create it.
2071 ** Creation may fail because of the directory being
2072 ** created by some other multiprocessor, so we get
2073 ** to do extra checking.
2074 */
2075 if (mkdir(name, (S_IRUSR | S_IWUSR | S_IXUSR
2076 | S_IRGRP | S_IXGRP | S_IROTH
2077 | S_IXOTH)) != 0
2078 && (errno != EEXIST || !itsdir(name))) {
2079 warn(_("can't create directory %s"), name);
2080 ifree(name);
2081 return -1;
2082 }
2083 }
2084 *cp = '/';
2085 }
2086 ifree(name);
2087 return 0;
2088 }
2089
2090 static long
2091 eitol(const int i)
2092 {
2093 long l;
2094
2095 l = i;
2096 if ((i < 0 && l >= 0) || (i == 0 && l != 0) || (i > 0 && l <= 0))
2097 errx(EXIT_FAILURE, _("%d did not sign extend correctly"), i);
2098 return l;
2099 }
2100
2101 #include <grp.h>
2102 #include <pwd.h>
2103
2104 static void
2105 setgroup(gid_t *flag, const char *name)
2106 {
2107 struct group *gr;
2108
2109 if (*flag != (gid_t)-1)
2110 errx(EXIT_FAILURE, _("multiple -g flags specified"));
2111
2112 gr = getgrnam(name);
2113 if (gr == 0) {
2114 char *ep;
2115 unsigned long ul;
2116
2117 ul = strtoul(name, &ep, 10);
2118 if (ul == (unsigned long)(gid_t)ul && *ep == '\0') {
2119 *flag = ul;
2120 return;
2121 }
2122 errx(EXIT_FAILURE, _("group `%s' not found"), name);
2123 }
2124 *flag = gr->gr_gid;
2125 }
2126
2127 static void
2128 setuser(uid_t *flag, const char *name)
2129 {
2130 struct passwd *pw;
2131
2132 if (*flag != (gid_t)-1)
2133 errx(EXIT_FAILURE, _("multiple -u flags specified"));
2134
2135 pw = getpwnam(name);
2136 if (pw == 0) {
2137 char *ep;
2138 unsigned long ul;
2139
2140 ul = strtoul(name, &ep, 10);
2141 if (ul == (unsigned long)(gid_t)ul && *ep == '\0') {
2142 *flag = ul;
2143 return;
2144 }
2145 errx(EXIT_FAILURE, _("user `%s' not found"), name);
2146 }
2147 *flag = pw->pw_uid;
2148 }
2149
2150 /*
2151 ** UNIX was a registered trademark of UNIX System Laboratories in 1993.
2152 */
DragonFly BSD