1 static char elsieid[] = "@(#)zdump.c 8.3";
2
3 /*
4 ** This code has been made independent of the rest of the time
5 ** conversion package to increase confidence in the verification it provides.
6 ** You can use this code to help in verifying other implementations.
7 */
8
9 /*
10 * ICU note: Mr. Arthur David Olson (olsona@dc37a.nci.nih.gov) stated that
11 * "zdump.c is indeed in the public domain" in e-mail on Feb 22, 2007.
12 * This version of zdump.c is modified by ICU team to change output format
13 * and some additional options.
14 */
15
16
17 #include "stdio.h" /* for stdout, stderr, perror */
18 #include "string.h" /* for strcpy */
19 #include "sys/types.h" /* for time_t */
20 #include "time.h" /* for struct tm */
21 #include "stdlib.h" /* for exit, malloc, atoi */
22 #include "float.h" /* for FLT_MAX and DBL_MAX */
23 #include "ctype.h" /* for isalpha et al. */
24
25 /* Enable extensions and modifications for ICU. */
26 #define ICU
27
28 #ifdef ICU
29 #include "dirent.h"
30 #endif
31
32 #ifndef isascii
33 #define isascii(x) 1
34 #endif /* !defined isascii */
35
36 #ifndef ZDUMP_LO_YEAR
37 #define ZDUMP_LO_YEAR (-500)
38 #endif /* !defined ZDUMP_LO_YEAR */
39
40 #ifndef ZDUMP_HI_YEAR
41 #define ZDUMP_HI_YEAR 2500
42 #endif /* !defined ZDUMP_HI_YEAR */
43
44 #ifndef MAX_STRING_LENGTH
45 #define MAX_STRING_LENGTH 1024
46 #endif /* !defined MAX_STRING_LENGTH */
47
48 #ifndef TRUE
49 #define TRUE 1
50 #endif /* !defined TRUE */
51
52 #ifndef FALSE
53 #define FALSE 0
54 #endif /* !defined FALSE */
55
56 #ifndef EXIT_SUCCESS
57 #define EXIT_SUCCESS 0
58 #endif /* !defined EXIT_SUCCESS */
59
60 #ifndef EXIT_FAILURE
61 #define EXIT_FAILURE 1
62 #endif /* !defined EXIT_FAILURE */
63
64 #ifndef SECSPERMIN
65 #define SECSPERMIN 60
66 #endif /* !defined SECSPERMIN */
67
68 #ifndef MINSPERHOUR
69 #define MINSPERHOUR 60
70 #endif /* !defined MINSPERHOUR */
71
72 #ifndef SECSPERHOUR
73 #define SECSPERHOUR (SECSPERMIN * MINSPERHOUR)
74 #endif /* !defined SECSPERHOUR */
75
76 #ifndef HOURSPERDAY
77 #define HOURSPERDAY 24
78 #endif /* !defined HOURSPERDAY */
79
80 #ifndef EPOCH_YEAR
81 #define EPOCH_YEAR 1970
82 #endif /* !defined EPOCH_YEAR */
83
84 #ifndef TM_YEAR_BASE
85 #define TM_YEAR_BASE 1900
86 #endif /* !defined TM_YEAR_BASE */
87
88 #ifndef DAYSPERNYEAR
89 #define DAYSPERNYEAR 365
90 #endif /* !defined DAYSPERNYEAR */
91
92 #ifndef isleap
93 #define isleap(y) (((y) % 4) == 0 && (((y) % 100) != 0 || ((y) % 400) == 0))
94 #endif /* !defined isleap */
95
96 #ifndef isleap_sum
97 /*
98 ** See tzfile.h for details on isleap_sum.
99 */
100 #define isleap_sum(a, b) isleap((a) % 400 + (b) % 400)
101 #endif /* !defined isleap_sum */
102
103 #define SECSPERDAY ((long) SECSPERHOUR * HOURSPERDAY)
104 #define SECSPERNYEAR (SECSPERDAY * DAYSPERNYEAR)
105 #define SECSPERLYEAR (SECSPERNYEAR + SECSPERDAY)
106
107 #if HAVE_GETTEXT
108 #include "locale.h" /* for setlocale */
109 #include "libintl.h"
110 #endif /* HAVE_GETTEXT */
111
112 #ifndef GNUC_or_lint
113 #ifdef lint
114 #define GNUC_or_lint
115 #else /* !defined lint */
116 #ifdef __GNUC__
117 #define GNUC_or_lint
118 #endif /* defined __GNUC__ */
119 #endif /* !defined lint */
120 #endif /* !defined GNUC_or_lint */
121
122 #ifndef INITIALIZE
123 #ifdef GNUC_or_lint
124 #define INITIALIZE(x) ((x) = 0)
125 #else /* !defined GNUC_or_lint */
126 #define INITIALIZE(x)
127 #endif /* !defined GNUC_or_lint */
128 #endif /* !defined INITIALIZE */
129
130 /*
131 ** For the benefit of GNU folk...
132 ** `_(MSGID)' uses the current locale's message library string for MSGID.
133 ** The default is to use gettext if available, and use MSGID otherwise.
134 */
135
136 #ifndef _
137 #if HAVE_GETTEXT
138 #define _(msgid) gettext(msgid)
139 #else /* !HAVE_GETTEXT */
140 #define _(msgid) msgid
141 #endif /* !HAVE_GETTEXT */
142 #endif /* !defined _ */
143
144 #ifndef TZ_DOMAIN
145 #define TZ_DOMAIN "tz"
146 #endif /* !defined TZ_DOMAIN */
147
148 #ifndef P
149 #define P(x) x
150 #endif /* !defined P */
151
152 extern char ** environ;
153 extern int getopt P((int argc, char * const argv[],
154 const char * options));
155 extern char * optarg;
156 extern int optind;
157 extern char * tzname[2];
158
159 static time_t absolute_min_time;
160 static time_t absolute_max_time;
161 static size_t longest;
162 static char * progname;
163 static int warned;
164
165 static char * abbr P((struct tm * tmp));
166 static void abbrok P((const char * abbrp, const char * zone));
167 static long delta P((struct tm * newp, struct tm * oldp));
168 static void dumptime P((const struct tm * tmp));
169 static time_t hunt P((char * name, time_t lot, time_t hit));
170 static void setabsolutes P((void));
171 static void show P((char * zone, time_t t, int v));
172 static const char * tformat P((void));
173 static time_t yeartot P((long y));
174 #ifdef ICU
175 typedef struct listentry {
176 char * name;
177 struct listentry * next;
178 } listentry;
179
180 static time_t huntICU P((char * name, time_t lot, time_t hit, FILE *fp));
181 static void dumptimeICU P((FILE * fp, time_t t));
182 static void showICU P((FILE * fp, char * zone, time_t t1, time_t t2));
183 static int getall P((struct listentry ** namelist));
184 static void getzones P((char * basedir, char * subdir, struct listentry ** last, int * count));
185 #endif
186
187 #ifndef TYPECHECK
188 #define my_localtime localtime
189 #else /* !defined TYPECHECK */
190 static struct tm *
my_localtime(tp)191 my_localtime(tp)
192 time_t * tp;
193 {
194 register struct tm * tmp;
195
196 tmp = localtime(tp);
197 if (tp != NULL && tmp != NULL) {
198 struct tm tm;
199 register time_t t;
200
201 tm = *tmp;
202 t = mktime(&tm);
203 if (t - *tp >= 1 || *tp - t >= 1) {
204 (void) fflush(stdout);
205 (void) fprintf(stderr, "\n%s: ", progname);
206 (void) fprintf(stderr, tformat(), *tp);
207 (void) fprintf(stderr, " ->");
208 (void) fprintf(stderr, " year=%d", tmp->tm_year);
209 (void) fprintf(stderr, " mon=%d", tmp->tm_mon);
210 (void) fprintf(stderr, " mday=%d", tmp->tm_mday);
211 (void) fprintf(stderr, " hour=%d", tmp->tm_hour);
212 (void) fprintf(stderr, " min=%d", tmp->tm_min);
213 (void) fprintf(stderr, " sec=%d", tmp->tm_sec);
214 (void) fprintf(stderr, " isdst=%d", tmp->tm_isdst);
215 (void) fprintf(stderr, " -> ");
216 (void) fprintf(stderr, tformat(), t);
217 (void) fprintf(stderr, "\n");
218 }
219 }
220 return tmp;
221 }
222 #endif /* !defined TYPECHECK */
223
224 static void
abbrok(abbrp,zone)225 abbrok(abbrp, zone)
226 const char * const abbrp;
227 const char * const zone;
228 {
229 register const char * cp;
230 register char * wp;
231
232 if (warned)
233 return;
234 cp = abbrp;
235 wp = NULL;
236 while (isascii((unsigned char) *cp) && isalpha((unsigned char) *cp))
237 ++cp;
238 if (cp - abbrp == 0)
239 wp = _("lacks alphabetic at start");
240 else if (cp - abbrp < 3)
241 wp = _("has fewer than 3 alphabetics");
242 else if (cp - abbrp > 6)
243 wp = _("has more than 6 alphabetics");
244 if (wp == NULL && (*cp == '+' || *cp == '-')) {
245 ++cp;
246 if (isascii((unsigned char) *cp) &&
247 isdigit((unsigned char) *cp))
248 if (*cp++ == '1' && *cp >= '0' && *cp <= '4')
249 ++cp;
250 if (*cp != '\0')
251 wp = _("differs from POSIX standard");
252 }
253 if (wp == NULL)
254 return;
255 (void) fflush(stdout);
256 (void) fprintf(stderr,
257 _("%s: warning: zone \"%s\" abbreviation \"%s\" %s\n"),
258 progname, zone, abbrp, wp);
259 warned = TRUE;
260 }
261
262 int
main(argc,argv)263 main(argc, argv)
264 int argc;
265 char * argv[];
266 {
267 register int i;
268 register int c;
269 register int vflag;
270 register char * cutarg;
271 register long cutloyear = ZDUMP_LO_YEAR;
272 register long cuthiyear = ZDUMP_HI_YEAR;
273 register time_t cutlotime;
274 register time_t cuthitime;
275 register char ** fakeenv;
276 time_t now;
277 time_t t;
278 time_t newt;
279 struct tm tm;
280 struct tm newtm;
281 register struct tm * tmp;
282 register struct tm * newtmp;
283 #ifdef ICU
284 int nextopt;
285 char * dirarg;
286 int aflag;
287 int iflag;
288 listentry * namelist = NULL;
289 FILE * fp = stdout;
290 #endif
291
292 INITIALIZE(cutlotime);
293 INITIALIZE(cuthitime);
294 #if HAVE_GETTEXT
295 (void) setlocale(LC_ALL, "");
296 #ifdef TZ_DOMAINDIR
297 (void) bindtextdomain(TZ_DOMAIN, TZ_DOMAINDIR);
298 #endif /* defined TEXTDOMAINDIR */
299 (void) textdomain(TZ_DOMAIN);
300 #endif /* HAVE_GETTEXT */
301 progname = argv[0];
302 for (i = 1; i < argc; ++i)
303 if (strcmp(argv[i], "--version") == 0) {
304 (void) printf("%s\n", elsieid);
305 exit(EXIT_SUCCESS);
306 }
307 vflag = 0;
308 cutarg = NULL;
309 #ifdef ICU
310 aflag = 0;
311 iflag = 0;
312 dirarg = NULL;
313 nextopt = 1;
314 while(nextopt) {
315 c = getopt(argc, argv, "ac:d:iv");
316 switch(c) {
317 case 'a':
318 aflag = 1;
319 break;
320 case 'c':
321 cutarg = optarg;
322 break;
323 case 'd':
324 dirarg = optarg;
325 break;
326 case 'i':
327 iflag = 1;
328 break;
329 case 'v':
330 vflag = 1;
331 break;
332 default:
333 nextopt = 0;
334 break;
335 }
336 }
337 if ((c != EOF && c != -1) ||
338 (optind == argc - 1 && strcmp(argv[optind], "=") == 0)) {
339 (void) fprintf(stderr,
340 _("%s: usage is %s [ --version ] [ -a ] [ -v ] [ -i ] [ -c [loyear,]hiyear ] [ -d dir ] [ zonename ... ]\n"),
341 progname, progname);
342 exit(EXIT_FAILURE);
343 }
344
345 if (dirarg != NULL) {
346 DIR * dp;
347 /* create the output directory */
348 mkdir(dirarg, 0777);
349 if ((dp = opendir(dirarg)) == NULL) {
350 fprintf(stderr, "cannot create the target directory");
351 exit(EXIT_FAILURE);
352 }
353 closedir(dp);
354 }
355 #else
356 while ((c = getopt(argc, argv, "c:v")) == 'c' || c == 'v')
357 if (c == 'v')
358 vflag = 1;
359 else cutarg = optarg;
360 if ((c != EOF && c != -1) ||
361 (optind == argc - 1 && strcmp(argv[optind], "=") == 0)) {
362 (void) fprintf(stderr,
363 _("%s: usage is %s [ --version ] [ -v ] [ -c [loyear,]hiyear ] zonename ...\n"),
364 progname, progname);
365 exit(EXIT_FAILURE);
366 }
367 #endif
368 if (vflag) {
369 if (cutarg != NULL) {
370 long lo;
371 long hi;
372 char dummy;
373
374 if (sscanf(cutarg, "%ld%c", &hi, &dummy) == 1) {
375 cuthiyear = hi;
376 } else if (sscanf(cutarg, "%ld,%ld%c",
377 &lo, &hi, &dummy) == 2) {
378 cutloyear = lo;
379 cuthiyear = hi;
380 } else {
381 (void) fprintf(stderr, _("%s: wild -c argument %s\n"),
382 progname, cutarg);
383 exit(EXIT_FAILURE);
384 }
385 }
386 setabsolutes();
387 cutlotime = yeartot(cutloyear);
388 cuthitime = yeartot(cuthiyear);
389 }
390
391 #ifdef ICU
392 if (aflag) {
393 /* get all available zones */
394 char ** fakeargv;
395 int i;
396 int count;
397
398 count = getall(&namelist);
399
400 fakeargv = (char **) malloc((size_t) (argc + count) * sizeof *argv);
401 /*
402 if ((fakeargv = (char **) malloc((size_t) (argc + count) * sizeof *argv)) == NULL) {
403 exit(EXIT_FAILURE);
404 }
405 */
406 for (i = 0; i < argc; i++) {
407 fakeargv[i] = argv[i];
408 }
409 for (i = 0; i < count; i++) {
410 fakeargv[i + argc] = namelist->name;
411 namelist = namelist->next;
412 }
413 argv = fakeargv;
414 argc += count;
415 }
416 #endif
417 (void) time(&now);
418 longest = 0;
419 for (i = optind; i < argc; ++i)
420 if (strlen(argv[i]) > longest)
421 longest = strlen(argv[i]);
422 {
423 register int from;
424 register int to;
425
426 for (i = 0; environ[i] != NULL; ++i)
427 continue;
428 fakeenv = (char **) malloc((size_t) ((i + 2) *
429 sizeof *fakeenv));
430 if (fakeenv == NULL ||
431 (fakeenv[0] = (char *) malloc(longest + 4)) == NULL) {
432 (void) perror(progname);
433 exit(EXIT_FAILURE);
434 }
435 to = 0;
436 (void) strcpy(fakeenv[to++], "TZ=");
437 for (from = 0; environ[from] != NULL; ++from)
438 if (strncmp(environ[from], "TZ=", 3) != 0)
439 fakeenv[to++] = environ[from];
440 fakeenv[to] = NULL;
441 environ = fakeenv;
442 }
443 for (i = optind; i < argc; ++i) {
444 static char buf[MAX_STRING_LENGTH];
445
446 (void) strcpy(&fakeenv[0][3], argv[i]);
447 if (!vflag) {
448 show(argv[i], now, FALSE);
449 continue;
450 }
451 #ifdef ICU
452 fp = NULL;
453 if (iflag) {
454 if (dirarg == NULL) {
455 /* we want to display a zone name here */
456 if (i != optind) {
457 printf("\n");
458 }
459 printf("ZONE: %s\n", argv[i]);
460 } else {
461 int zstart;
462 char path[FILENAME_MAX + 1];
463 strcpy(path, dirarg);
464 strcat(path, "/");
465 zstart = strlen(path);
466 strcat(path, argv[i]);
467 /* replace '/' with '-' */
468 while(path[++zstart] != 0) {
469 if (path[zstart] == '/') {
470 path[zstart] = '-';
471 }
472 }
473 if ((fp = fopen(path, "w")) == NULL) {
474 fprintf(stderr, "cannot create output file %s\n", path);
475 exit(EXIT_FAILURE);
476 }
477 }
478 }
479 #endif
480 warned = FALSE;
481 t = absolute_min_time;
482 #ifdef ICU
483 /* skip displaying info for the lowest time, which is actually not
484 * a transition when -i option is set */
485 if (!iflag) {
486 #endif
487 show(argv[i], t, TRUE);
488 t += SECSPERHOUR * HOURSPERDAY;
489 show(argv[i], t, TRUE);
490 #ifdef ICU
491 }
492 #endif
493 if (t < cutlotime)
494 t = cutlotime;
495 tmp = my_localtime(&t);
496 if (tmp != NULL) {
497 tm = *tmp;
498 (void) strncpy(buf, abbr(&tm), (sizeof buf) - 1);
499 }
500 for ( ; ; ) {
501 if (t >= cuthitime)
502 break;
503 newt = t + SECSPERHOUR * 12;
504 if (newt >= cuthitime)
505 break;
506 if (newt <= t)
507 break;
508 newtmp = localtime(&newt);
509 if (newtmp != NULL)
510 newtm = *newtmp;
511 #ifdef ICU
512 if (iflag) {
513 /* We do not want to capture transitions just for
514 * abbreviated zone name changes */
515 if ((tmp == NULL || newtmp == NULL) ? (tmp != newtmp) :
516 (delta(&newtm, &tm) != (newt - t) ||
517 newtm.tm_isdst != tm.tm_isdst)) {
518 newt = huntICU(argv[i], t, newt, fp);
519 newtmp = localtime(&newt);
520 if (newtmp != NULL) {
521 newtm = *newtmp;
522 (void) strncpy(buf,
523 abbr(&newtm),
524 (sizeof buf) - 1);
525 }
526 }
527 } else {
528 #endif
529 if ((tmp == NULL || newtmp == NULL) ? (tmp != newtmp) :
530 (delta(&newtm, &tm) != (newt - t) ||
531 newtm.tm_isdst != tm.tm_isdst ||
532 strcmp(abbr(&newtm), buf) != 0)) {
533 newt = hunt(argv[i], t, newt);
534 newtmp = localtime(&newt);
535 if (newtmp != NULL) {
536 newtm = *newtmp;
537 (void) strncpy(buf,
538 abbr(&newtm),
539 (sizeof buf) - 1);
540 }
541 }
542 #ifdef ICU
543 }
544 #endif
545 t = newt;
546 tm = newtm;
547 tmp = newtmp;
548 }
549 #ifdef ICU
550 if (!iflag) {
551 /* skip displaying info for the highest time, which is actually not
552 * a transition when -i option is used*/
553 #endif
554 t = absolute_max_time;
555 t -= SECSPERHOUR * HOURSPERDAY;
556 show(argv[i], t, TRUE);
557 t += SECSPERHOUR * HOURSPERDAY;
558 show(argv[i], t, TRUE);
559
560 #ifdef ICU
561 }
562 /* close file */
563 if (fp != NULL) {
564 fclose(fp);
565 }
566 #endif
567 }
568 if (fflush(stdout) || ferror(stdout)) {
569 (void) fprintf(stderr, "%s: ", progname);
570 (void) perror(_("Error writing to standard output"));
571 exit(EXIT_FAILURE);
572 }
573 #ifdef ICU
574 if (aflag) {
575 struct listentry * entry = namelist;
576 struct listentry * next;
577 while (entry != NULL) {
578 free(entry->name);
579 next = entry->next;
580 free(entry);
581 entry = next;
582 }
583 }
584 #endif
585 exit(EXIT_SUCCESS);
586 /* If exit fails to exit... */
587 return EXIT_FAILURE;
588 }
589
590 static void
setabsolutes()591 setabsolutes()
592 {
593 if (0.5 == (time_t) 0.5) {
594 /*
595 ** time_t is floating.
596 */
597 if (sizeof (time_t) == sizeof (float)) {
598 absolute_min_time = (time_t) -FLT_MAX;
599 absolute_max_time = (time_t) FLT_MAX;
600 } else if (sizeof (time_t) == sizeof (double)) {
601 absolute_min_time = (time_t) -DBL_MAX;
602 absolute_max_time = (time_t) DBL_MAX;
603 } else {
604 (void) fprintf(stderr,
605 _("%s: use of -v on system with floating time_t other than float or double\n"),
606 progname);
607 exit(EXIT_FAILURE);
608 }
609 } else if (0 > (time_t) -1) {
610 /*
611 ** time_t is signed. Assume overflow wraps around.
612 */
613 time_t t = 0;
614 time_t t1 = 1;
615
616 while (t < t1) {
617 t = t1;
618 t1 = 2 * t1 + 1;
619 }
620
621 absolute_max_time = t;
622 t = -t;
623 absolute_min_time = t - 1;
624 if (t < absolute_min_time)
625 absolute_min_time = t;
626 } else {
627 /*
628 ** time_t is unsigned.
629 */
630 absolute_min_time = 0;
631 absolute_max_time = absolute_min_time - 1;
632 }
633 }
634
635 static time_t
yeartot(y)636 yeartot(y)
637 const long y;
638 {
639 register long myy;
640 register long seconds;
641 register time_t t;
642
643 myy = EPOCH_YEAR;
644 t = 0;
645 while (myy != y) {
646 if (myy < y) {
647 seconds = isleap(myy) ? SECSPERLYEAR : SECSPERNYEAR;
648 ++myy;
649 if (t > absolute_max_time - seconds) {
650 t = absolute_max_time;
651 break;
652 }
653 t += seconds;
654 } else {
655 --myy;
656 seconds = isleap(myy) ? SECSPERLYEAR : SECSPERNYEAR;
657 if (t < absolute_min_time + seconds) {
658 t = absolute_min_time;
659 break;
660 }
661 t -= seconds;
662 }
663 }
664 return t;
665 }
666
667 static time_t
hunt(char * name,time_t lot,time_t hit)668 hunt(char *name, time_t lot, time_t hit)
669 {
670 time_t t;
671 long diff;
672 struct tm lotm;
673 register struct tm * lotmp;
674 struct tm tm;
675 register struct tm * tmp;
676 char loab[MAX_STRING_LENGTH];
677
678 lotmp = my_localtime(&lot);
679 if (lotmp != NULL) {
680 lotm = *lotmp;
681 (void) strncpy(loab, abbr(&lotm), (sizeof loab) - 1);
682 }
683 for ( ; ; ) {
684 diff = (long) (hit - lot);
685 if (diff < 2)
686 break;
687 t = lot;
688 t += diff / 2;
689 if (t <= lot)
690 ++t;
691 else if (t >= hit)
692 --t;
693 tmp = my_localtime(&t);
694 if (tmp != NULL)
695 tm = *tmp;
696 if ((lotmp == NULL || tmp == NULL) ? (lotmp == tmp) :
697 (delta(&tm, &lotm) == (t - lot) &&
698 tm.tm_isdst == lotm.tm_isdst &&
699 strcmp(abbr(&tm), loab) == 0)) {
700 lot = t;
701 lotm = tm;
702 lotmp = tmp;
703 } else hit = t;
704 }
705 show(name, lot, TRUE);
706 show(name, hit, TRUE);
707 return hit;
708 }
709
710 /*
711 ** Thanks to Paul Eggert for logic used in delta.
712 */
713
714 static long
delta(newp,oldp)715 delta(newp, oldp)
716 struct tm * newp;
717 struct tm * oldp;
718 {
719 register long result;
720 register int tmy;
721
722 if (newp->tm_year < oldp->tm_year)
723 return -delta(oldp, newp);
724 result = 0;
725 for (tmy = oldp->tm_year; tmy < newp->tm_year; ++tmy)
726 result += DAYSPERNYEAR + isleap_sum(tmy, TM_YEAR_BASE);
727 result += newp->tm_yday - oldp->tm_yday;
728 result *= HOURSPERDAY;
729 result += newp->tm_hour - oldp->tm_hour;
730 result *= MINSPERHOUR;
731 result += newp->tm_min - oldp->tm_min;
732 result *= SECSPERMIN;
733 result += newp->tm_sec - oldp->tm_sec;
734 return result;
735 }
736
737 static void
show(char * zone,time_t t,int v)738 show(char *zone, time_t t, int v)
739 {
740 register struct tm * tmp;
741
742 (void) printf("%-*s ", (int) longest, zone);
743 if (v) {
744 tmp = gmtime(&t);
745 if (tmp == NULL) {
746 (void) printf(tformat(), t);
747 } else {
748 dumptime(tmp);
749 (void) printf(" UTC");
750 }
751 (void) printf(" = ");
752 }
753 tmp = my_localtime(&t);
754 dumptime(tmp);
755 if (tmp != NULL) {
756 if (*abbr(tmp) != '\0')
757 (void) printf(" %s", abbr(tmp));
758 if (v) {
759 (void) printf(" isdst=%d", tmp->tm_isdst);
760 #ifdef TM_GMTOFF
761 (void) printf(" gmtoff=%ld", tmp->TM_GMTOFF);
762 #endif /* defined TM_GMTOFF */
763 }
764 }
765 (void) printf("\n");
766 if (tmp != NULL && *abbr(tmp) != '\0')
767 abbrok(abbr(tmp), zone);
768 }
769
770 static char *
abbr(tmp)771 abbr(tmp)
772 struct tm * tmp;
773 {
774 register char * result;
775 static char nada;
776
777 if (tmp->tm_isdst != 0 && tmp->tm_isdst != 1)
778 return &nada;
779 result = tzname[tmp->tm_isdst];
780 return (result == NULL) ? &nada : result;
781 }
782
783 /*
784 ** The code below can fail on certain theoretical systems;
785 ** it works on all known real-world systems as of 2004-12-30.
786 */
787
788 static const char *
tformat()789 tformat()
790 {
791 if (0.5 == (time_t) 0.5) { /* floating */
792 if (sizeof (time_t) > sizeof (double))
793 return "%Lg";
794 return "%g";
795 }
796 if (0 > (time_t) -1) { /* signed */
797 if (sizeof (time_t) > sizeof (long))
798 return "%lld";
799 if (sizeof (time_t) > sizeof (int))
800 return "%ld";
801 return "%d";
802 }
803 if (sizeof (time_t) > sizeof (unsigned long))
804 return "%llu";
805 if (sizeof (time_t) > sizeof (unsigned int))
806 return "%lu";
807 return "%u";
808 }
809
810 static void
dumptime(timeptr)811 dumptime(timeptr)
812 register const struct tm * timeptr;
813 {
814 static const char wday_name[][3] = {
815 "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"
816 };
817 static const char mon_name[][3] = {
818 "Jan", "Feb", "Mar", "Apr", "May", "Jun",
819 "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
820 };
821 register const char * wn;
822 register const char * mn;
823 register int lead;
824 register int trail;
825
826 if (timeptr == NULL) {
827 (void) printf("NULL");
828 return;
829 }
830 /*
831 ** The packaged versions of localtime and gmtime never put out-of-range
832 ** values in tm_wday or tm_mon, but since this code might be compiled
833 ** with other (perhaps experimental) versions, paranoia is in order.
834 */
835 if (timeptr->tm_wday < 0 || timeptr->tm_wday >=
836 (int) (sizeof wday_name / sizeof wday_name[0]))
837 wn = "???";
838 else wn = wday_name[timeptr->tm_wday];
839 if (timeptr->tm_mon < 0 || timeptr->tm_mon >=
840 (int) (sizeof mon_name / sizeof mon_name[0]))
841 mn = "???";
842 else mn = mon_name[timeptr->tm_mon];
843 (void) printf("%.3s %.3s%3d %.2d:%.2d:%.2d ",
844 wn, mn,
845 timeptr->tm_mday, timeptr->tm_hour,
846 timeptr->tm_min, timeptr->tm_sec);
847 #define DIVISOR 10
848 trail = timeptr->tm_year % DIVISOR + TM_YEAR_BASE % DIVISOR;
849 lead = timeptr->tm_year / DIVISOR + TM_YEAR_BASE / DIVISOR +
850 trail / DIVISOR;
851 trail %= DIVISOR;
852 if (trail < 0 && lead > 0) {
853 trail += DIVISOR;
854 --lead;
855 } else if (lead < 0 && trail > 0) {
856 trail -= DIVISOR;
857 ++lead;
858 }
859 if (lead == 0)
860 (void) printf("%d", trail);
861 else (void) printf("%d%d", lead, ((trail < 0) ? -trail : trail));
862 }
863
864 #ifdef ICU
865 static time_t
huntICU(char * name,time_t lot,time_t hit,FILE * fp)866 huntICU(char *name, time_t lot, time_t hit, FILE * fp)
867 {
868 time_t t;
869 long diff;
870 struct tm lotm;
871 register struct tm * lotmp;
872 struct tm tm;
873 register struct tm * tmp;
874 char loab[MAX_STRING_LENGTH];
875
876 lotmp = my_localtime(&lot);
877 if (lotmp != NULL) {
878 lotm = *lotmp;
879 (void) strncpy(loab, abbr(&lotm), (sizeof loab) - 1);
880 }
881 for ( ; ; ) {
882 diff = (long) (hit - lot);
883 if (diff < 2)
884 break;
885 t = lot;
886 t += diff / 2;
887 if (t <= lot)
888 ++t;
889 else if (t >= hit)
890 --t;
891 tmp = my_localtime(&t);
892 if (tmp != NULL)
893 tm = *tmp;
894 /* We do not want to capture transitions just for
895 * abbreviated zone name changes */
896 if ((lotmp == NULL || tmp == NULL) ? (lotmp == tmp) :
897 (delta(&tm, &lotm) == (t - lot) &&
898 tm.tm_isdst == lotm.tm_isdst)) {
899 lot = t;
900 lotm = tm;
901 lotmp = tmp;
902 } else hit = t;
903 }
904 showICU(fp, name, lot, hit);
905 return hit;
906 }
907
showICU(FILE * fp,char * zone,time_t t1,time_t t2)908 static void showICU(FILE * fp, char *zone, time_t t1, time_t t2)
909 {
910 if (fp == NULL) {
911 fp = stdout;
912 }
913 dumptimeICU(fp, t1);
914 fprintf(fp, " > ");
915 dumptimeICU(fp, t2);
916 fprintf(fp, "\n");
917 }
918
dumptimeICU(FILE * fp,time_t t)919 static void dumptimeICU(FILE * fp, time_t t)
920 {
921 static const char wday_name[][3] = {
922 "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"
923 };
924 struct tm gmt;
925 struct tm loc;
926 register int lead;
927 register int trail;
928 long offset;
929 long hour, min, sec;
930
931 loc = *my_localtime(&t);
932
933 trail = loc.tm_year % DIVISOR + TM_YEAR_BASE % DIVISOR;
934 lead = loc.tm_year / DIVISOR + TM_YEAR_BASE / DIVISOR + trail / DIVISOR;
935 trail %= DIVISOR;
936 if (trail < 0 && lead > 0) {
937 trail += DIVISOR;
938 --lead;
939 } else if (lead < 0 && trail > 0) {
940 trail -= DIVISOR;
941 ++lead;
942 }
943
944 fprintf(fp, "%04d-%02d-%02d", lead * DIVISOR + trail, loc.tm_mon + 1, loc.tm_mday);
945 fprintf(fp, " %.3s ", wday_name[loc.tm_wday]);
946 fprintf(fp, "%02d:%02d:%02d", loc.tm_hour, loc.tm_min, loc.tm_sec);
947
948 gmt = *gmtime(&t);
949 offset = delta(&loc, &gmt);
950 if (offset < 0) {
951 offset = -offset;
952 fprintf(fp, "-");
953 } else {
954 fprintf(fp, "+");
955 }
956
957 sec = offset % 60;
958 offset = (offset - sec) / 60;
959 min = offset % 60;
960 hour = offset / 60;
961
962 fprintf(fp, "%02d", hour);
963 fprintf(fp, "%02d", min);
964 fprintf(fp, "%02d", sec);
965 fprintf(fp, "[DST=%d]", loc.tm_isdst);
966 }
967
getall(struct listentry ** namelist)968 static int getall(struct listentry ** namelist) {
969 int count = 0;
970 struct listentry dummyentry;
971 struct listentry * last = &dummyentry;
972
973 getzones(TZDIR, NULL, &last, &count);
974 if (count > 0) {
975 *namelist = dummyentry.next;
976 }
977
978 return count;
979 }
980
getzones(char * basedir,char * relpath,struct listentry ** last,int * count)981 static void getzones(char * basedir, char * relpath, struct listentry ** last, int * count) {
982 char path[FILENAME_MAX + 1];
983 struct dirent * dir;
984 DIR * dp;
985
986 strcpy(path, basedir);
987 if (relpath != NULL) {
988 strcat(path, "/");
989 strcat(path, relpath);
990 }
991
992 if ((dp = opendir(path)) == NULL) {
993 /* file */
994 if (strstr(relpath, ".tab") == NULL) {
995 char * pzonename;
996 listentry * pentry;
997
998 if ((pzonename = malloc(strlen(relpath) + 1)) == NULL) {
999 exit(EXIT_FAILURE);
1000 }
1001 strcpy(pzonename, relpath);
1002
1003 if ((pentry = malloc(sizeof(listentry))) == NULL) {
1004 exit(EXIT_FAILURE);
1005 }
1006
1007 pentry->name = pzonename;
1008 pentry->next = NULL;
1009 (*last)->next = pentry;
1010 *last = pentry;
1011 (*count)++;
1012 }
1013 } else {
1014 /* directory */
1015 while ((dir = readdir(dp)) != NULL) {
1016 char subpath[FILENAME_MAX + 1];
1017
1018 if (strcmp(dir->d_name, ".") == 0
1019 || strcmp(dir->d_name, "..") == 0) {
1020 continue;
1021 }
1022 if (relpath != NULL) {
1023 strcpy(subpath, relpath);
1024 strcat(subpath, "/");
1025 strcat(subpath, dir->d_name);
1026 } else {
1027 strcpy(subpath, dir->d_name);
1028 }
1029 getzones(basedir, subpath, last, count);
1030 }
1031 closedir(dp);
1032 }
1033 }
1034 #endif
1035