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2 * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
3 * Use is subject to license terms.
6 #pragma ident "%Z%%M% %I% %E% SMI"
10 * Taken from elsie.nci.nih.gov to replace the existing Solaris zdump,
11 * which was based on an earlier version of the elsie code.
13 * For zdump 7.24, the following changes were made to the elsie code:
14 * locale/textdomain/messages to match existing Solaris style.
15 * Solaris verbose mode is documented to display the current time first.
16 * cstyle cleaned code.
17 * removed old locale/textdomain code.
20 static char elsieid
[] = "@(#)zdump.c 7.74";
23 * This code has been made independent of the rest of the time
24 * conversion package to increase confidence in the verification it provides.
25 * You can use this code to help in verifying other implementations.
28 #include "stdio.h" /* for stdout, stderr, perror */
29 #include "string.h" /* for strcpy */
30 #include "sys/types.h" /* for time_t */
31 #include "time.h" /* for struct tm */
32 #include "stdlib.h" /* for exit, malloc, atoi */
33 #include "locale.h" /* for setlocale, textdomain */
36 #include "tzfile.h" /* for defines */
40 #define ZDUMP_LO_YEAR (-500)
41 #endif /* !defined ZDUMP_LO_YEAR */
44 #define ZDUMP_HI_YEAR 2500
45 #endif /* !defined ZDUMP_HI_YEAR */
47 #ifndef MAX_STRING_LENGTH
48 #define MAX_STRING_LENGTH 1024
49 #endif /* !defined MAX_STRING_LENGTH */
53 #endif /* !defined TRUE */
57 #endif /* !defined FALSE */
61 * See tzfile.h for details on isleap_sum.
63 #define isleap_sum(a, b) isleap((a) % 400 + (b) % 400)
64 #endif /* !defined isleap_sum */
67 #define SECSPERDAY ((long)SECSPERHOUR * HOURSPERDAY)
69 #define SECSPERNYEAR (SECSPERDAY * DAYSPERNYEAR)
70 #define SECSPERLYEAR (SECSPERNYEAR + SECSPERDAY)
75 #else /* !defined lint */
78 #endif /* defined __GNUC__ */
79 #endif /* !defined lint */
80 #endif /* !defined GNUC_or_lint */
84 #define INITIALIZE(x) ((x) = 0)
85 #else /* !defined GNUC_or_lint */
87 #endif /* !defined GNUC_or_lint */
88 #endif /* !defined INITIALIZE */
90 static time_t absolute_min_time
;
91 static time_t absolute_max_time
;
92 static size_t longest
;
93 static char *progname
;
96 static char *abbr(struct tm
*);
97 static void abbrok(const char *, const char *);
98 static long delta(struct tm
*, struct tm
*);
99 static void dumptime(const struct tm
*);
100 static time_t hunt(char *, time_t, time_t);
101 static void setabsolutes(void);
102 static void show(char *, time_t, int);
103 static void usage(void);
104 static const char *tformat(void);
105 static time_t yeartot(long y
);
108 #define my_localtime localtime
109 #else /* !defined TYPECHECK */
114 register struct tm
*tmp
;
117 if (tp
!= NULL
&& tmp
!= NULL
) {
123 if (t
- *tp
>= 1 || *tp
- t
>= 1) {
124 (void) fflush(stdout
);
125 (void) fprintf(stderr
, "\n%s: ", progname
);
126 (void) fprintf(stderr
, tformat(), *tp
);
127 (void) fprintf(stderr
, " ->");
128 (void) fprintf(stderr
, " year=%d", tmp
->tm_year
);
129 (void) fprintf(stderr
, " mon=%d", tmp
->tm_mon
);
130 (void) fprintf(stderr
, " mday=%d", tmp
->tm_mday
);
131 (void) fprintf(stderr
, " hour=%d", tmp
->tm_hour
);
132 (void) fprintf(stderr
, " min=%d", tmp
->tm_min
);
133 (void) fprintf(stderr
, " sec=%d", tmp
->tm_sec
);
134 (void) fprintf(stderr
, " isdst=%d", tmp
->tm_isdst
);
135 (void) fprintf(stderr
, " -> ");
136 (void) fprintf(stderr
, tformat(), t
);
137 (void) fprintf(stderr
, "\n");
142 #endif /* !defined TYPECHECK */
146 const char * const abbrp
;
147 const char * const zone
;
149 register const char *cp
;
155 while (isascii(*cp
) && isalpha((unsigned char)*cp
))
157 (void) fflush(stdout
);
158 if (cp
- abbrp
== 0) {
161 * The first %s prints for the program name (zdump),
162 * the second %s prints the timezone name, the third
163 * %s prints the timezone abbreviation (tzname[0] or
166 (void) fprintf(stderr
, gettext("%s: warning: zone \"%s\" "
167 "abbreviation \"%s\" lacks alphabetic at start\n"),
168 progname
, zone
, abbrp
);
170 } else if (cp
- abbrp
< 3) {
171 (void) fprintf(stderr
, gettext("%s: warning: zone \"%s\" "
172 "abbreviation \"%s\" has fewer than 3 alphabetics\n"),
173 progname
, zone
, abbrp
);
175 } else if (cp
- abbrp
> 6) {
176 (void) fprintf(stderr
, gettext("%s: warning: zone \"%s\" "
177 "abbreviation \"%s\" has more than 6 alphabetics\n"),
178 progname
, zone
, abbrp
);
181 if (error
== 0 && (*cp
== '+' || *cp
== '-')) {
183 if (isascii(*cp
) && isdigit((unsigned char)*cp
))
184 if (*cp
++ == '1' && *cp
>= '0' && *cp
<= '4')
187 (void) fprintf(stderr
, gettext("%s: warning: "
188 "zone \"%s\" abbreviation \"%s\" differs from "
189 "POSIX standard\n"), progname
, zone
, abbrp
);
205 register char *cutarg
;
206 register long cutloyear
= ZDUMP_LO_YEAR
;
207 register long cuthiyear
= ZDUMP_HI_YEAR
;
208 register time_t cutlotime
;
209 register time_t cuthitime
;
215 register struct tm
*tmp
;
216 register struct tm
*newtmp
;
218 INITIALIZE(cutlotime
);
219 INITIALIZE(cuthitime
);
221 (void) setlocale(LC_ALL
, "");
222 #if !defined(TEXT_DOMAIN) /* Should be defined by cc -D */
223 #define TEXT_DOMAIN "SYS_TEST" /* Use this only if it weren't */
225 (void) textdomain(TEXT_DOMAIN
);
228 for (i
= 1; i
< argc
; ++i
)
229 if (strcmp(argv
[i
], "--version") == 0) {
230 (void) printf("%s\n", elsieid
);
235 while ((c
= getopt(argc
, argv
, "c:v")) == 'c' || c
== 'v')
238 else cutarg
= optarg
;
240 (optind
== argc
- 1 && strcmp(argv
[optind
], "=") == 0)) {
245 if (cutarg
!= NULL
) {
250 if (sscanf(cutarg
, "%ld%c", &hi
, &dummy
) == 1) {
252 } else if (sscanf(cutarg
, "%ld,%ld%c",
253 &lo
, &hi
, &dummy
) == 2) {
257 (void) fprintf(stderr
, gettext("%s: wild -c argument %s\n"),
263 cutlotime
= yeartot(cutloyear
);
264 cuthitime
= yeartot(cuthiyear
);
268 for (i
= optind
; i
< argc
; ++i
)
269 if (strlen(argv
[i
]) > longest
)
270 longest
= strlen(argv
[i
]);
272 for (i
= optind
; i
< argc
; ++i
) {
273 static char buf
[MAX_STRING_LENGTH
];
274 static char *tzp
= NULL
;
276 (void) unsetenv("TZ");
279 if ((tzp
= malloc(3 + strlen(argv
[i
]) + 1)) == NULL
) {
283 (void) strcpy(tzp
, "TZ=");
284 (void) strcat(tzp
, argv
[i
]);
285 if (putenv(tzp
) != 0) {
290 show(argv
[i
], now
, FALSE
);
296 * We show the current time first, probably because we froze
297 * the behavior of zdump some time ago and then it got
300 show(argv
[i
], now
, TRUE
);
303 t
= absolute_min_time
;
304 show(argv
[i
], t
, TRUE
);
305 t
+= SECSPERHOUR
* HOURSPERDAY
;
306 show(argv
[i
], t
, TRUE
);
309 tmp
= my_localtime(&t
);
312 (void) strncpy(buf
, abbr(&tm
), sizeof (buf
) - 1);
317 /* check if newt will overrun maximum time_t value */
318 if (t
> LONG_MAX
- (SECSPERHOUR
* 12))
320 newt
= t
+ SECSPERHOUR
* 12;
321 if (newt
>= cuthitime
)
323 newtmp
= localtime(&newt
);
326 if ((tmp
== NULL
|| newtmp
== NULL
) ? (tmp
!= newtmp
) :
327 (delta(&newtm
, &tm
) != (newt
- t
) ||
328 newtm
.tm_isdst
!= tm
.tm_isdst
||
329 strcmp(abbr(&newtm
), buf
) != 0)) {
330 newt
= hunt(argv
[i
], t
, newt
);
331 newtmp
= localtime(&newt
);
332 if (newtmp
!= NULL
) {
343 t
= absolute_max_time
;
345 show(argv
[i
], t
, TRUE
);
346 t
-= SECSPERHOUR
* HOURSPERDAY
;
347 show(argv
[i
], t
, TRUE
);
348 #else /* !defined(sun) */
349 t
-= SECSPERHOUR
* HOURSPERDAY
;
350 show(argv
[i
], t
, TRUE
);
351 t
+= SECSPERHOUR
* HOURSPERDAY
;
352 show(argv
[i
], t
, TRUE
);
353 #endif /* !defined(sun) */
355 if (fflush(stdout
) || ferror(stdout
)) {
356 (void) fprintf(stderr
, "%s: ", progname
);
357 (void) perror(gettext("Error writing standard output"));
360 return (EXIT_SUCCESS
);
367 absolute_min_time
= LONG_MIN
;
368 absolute_max_time
= LONG_MAX
;
370 if (0.5 == (time_t)0.5) {
372 * time_t is floating.
374 if (sizeof (time_t) == sizeof (float)) {
375 absolute_min_time
= (time_t)-FLT_MAX
;
376 absolute_max_time
= (time_t)FLT_MAX
;
377 } else if (sizeof (time_t) == sizeof (double)) {
378 absolute_min_time
= (time_t)-DBL_MAX
;
379 absolute_max_time
= (time_t)DBL_MAX
;
381 (void) fprintf(stderr
, gettext("%s: use of -v on "
382 "system with floating time_t other than float "
383 "or double\n"), progname
);
387 /*CONSTANTCONDITION*/
388 if (0 > (time_t)-1) {
392 register time_t hibit
;
394 for (hibit
= 1; (hibit
* 2) != 0; hibit
*= 2)
396 absolute_min_time
= hibit
;
397 absolute_max_time
= -(hibit
+ 1);
400 * time_t is unsigned.
402 absolute_min_time
= 0;
403 absolute_max_time
= absolute_min_time
- 1;
413 register long seconds
;
420 seconds
= isleap(myy
) ? SECSPERLYEAR
: SECSPERNYEAR
;
422 if (t
> absolute_max_time
- seconds
) {
423 t
= absolute_max_time
;
429 seconds
= isleap(myy
) ? SECSPERLYEAR
: SECSPERNYEAR
;
430 if (t
< absolute_min_time
+ seconds
) {
431 t
= absolute_min_time
;
449 register struct tm
*lotmp
;
451 register struct tm
*tmp
;
452 char loab
[MAX_STRING_LENGTH
];
454 lotmp
= my_localtime(&lot
);
457 (void) strncpy(loab
, abbr(&lotm
), sizeof (loab
) - 1);
460 diff
= (long)(hit
- lot
);
469 tmp
= my_localtime(&t
);
472 if ((lotmp
== NULL
|| tmp
== NULL
) ? (lotmp
== tmp
) :
473 (delta(&tm
, &lotm
) == (t
- lot
) &&
474 tm
.tm_isdst
== lotm
.tm_isdst
&&
475 strcmp(abbr(&tm
), loab
) == 0)) {
481 show(name
, lot
, TRUE
);
482 show(name
, hit
, TRUE
);
487 * Thanks to Paul Eggert for logic used in delta.
495 register long result
;
498 if (newp
->tm_year
< oldp
->tm_year
)
499 return (-delta(oldp
, newp
));
501 for (tmy
= oldp
->tm_year
; tmy
< newp
->tm_year
; ++tmy
)
502 result
+= DAYSPERNYEAR
+ isleap_sum(tmy
, TM_YEAR_BASE
);
503 result
+= newp
->tm_yday
- oldp
->tm_yday
;
504 result
*= HOURSPERDAY
;
505 result
+= newp
->tm_hour
- oldp
->tm_hour
;
506 result
*= MINSPERHOUR
;
507 result
+= newp
->tm_min
- oldp
->tm_min
;
508 result
*= SECSPERMIN
;
509 result
+= newp
->tm_sec
- oldp
->tm_sec
;
519 register struct tm
*tmp
;
521 (void) printf("%-*s ", (int)longest
, zone
);
525 (void) printf(tformat(), t
);
528 (void) printf(" UTC");
530 (void) printf(" = ");
532 tmp
= my_localtime(&t
);
535 if (*abbr(tmp
) != '\0')
536 (void) printf(" %s", abbr(tmp
));
538 (void) printf(" isdst=%d", tmp
->tm_isdst
);
540 (void) printf(" gmtoff=%ld", tmp
->TM_GMTOFF
);
541 #endif /* defined TM_GMTOFF */
545 if (tmp
!= NULL
&& *abbr(tmp
) != '\0')
546 abbrok(abbr(tmp
), zone
);
553 register char *result
;
556 if (tmp
->tm_isdst
!= 0 && tmp
->tm_isdst
!= 1)
558 result
= tzname
[tmp
->tm_isdst
];
559 return ((result
== NULL
) ? &nada
: result
);
563 * The code below can fail on certain theoretical systems;
564 * it works on all known real-world systems as of 2004-12-30.
571 /* time_t is signed long */
574 /*CONSTANTCONDITION*/
575 if (0.5 == (time_t)0.5) { /* floating */
576 /*CONSTANTCONDITION*/
577 if (sizeof (time_t) > sizeof (double))
581 /*CONSTANTCONDITION*/
582 if (0 > (time_t)-1) { /* signed */
583 /*CONSTANTCONDITION*/
584 if (sizeof (time_t) > sizeof (long))
586 /*CONSTANTCONDITION*/
587 if (sizeof (time_t) > sizeof (int))
591 /*CONSTANTCONDITION*/
592 if (sizeof (time_t) > sizeof (unsigned long))
594 /*CONSTANTCONDITION*/
595 if (sizeof (time_t) > sizeof (unsigned int))
603 register const struct tm
*timeptr
;
605 static const char wday_name
[][3] = {
606 "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"
608 static const char mon_name
[][3] = {
609 "Jan", "Feb", "Mar", "Apr", "May", "Jun",
610 "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
612 register const char *wn
;
613 register const char *mn
;
617 if (timeptr
== NULL
) {
618 (void) printf("NULL");
622 * The packaged versions of localtime and gmtime never put out-of-range
623 * values in tm_wday or tm_mon, but since this code might be compiled
624 * with other (perhaps experimental) versions, paranoia is in order.
626 if (timeptr
->tm_wday
< 0 || timeptr
->tm_wday
>=
627 (int)(sizeof (wday_name
) / sizeof (wday_name
[0])))
629 else wn
= wday_name
[timeptr
->tm_wday
];
630 if (timeptr
->tm_mon
< 0 || timeptr
->tm_mon
>=
631 (int)(sizeof (mon_name
) / sizeof (mon_name
[0])))
633 else mn
= mon_name
[timeptr
->tm_mon
];
634 (void) printf("%.3s %.3s%3d %.2d:%.2d:%.2d ",
636 timeptr
->tm_mday
, timeptr
->tm_hour
,
637 timeptr
->tm_min
, timeptr
->tm_sec
);
639 trail
= timeptr
->tm_year
% DIVISOR
+ TM_YEAR_BASE
% DIVISOR
;
640 lead
= timeptr
->tm_year
/ DIVISOR
+ TM_YEAR_BASE
/ DIVISOR
+
643 if (trail
< 0 && lead
> 0) {
646 } else if (lead
< 0 && trail
> 0) {
651 (void) printf("%d", trail
);
653 (void) printf("%d%d", lead
, ((trail
< 0) ? -trail
: trail
));
659 (void) fprintf(stderr
, gettext(
660 "%s: [ --version ] [ -v ] [ -c [loyear,]hiyear ] zonename ...\n"),