OpenSolaris_b135/cmd/zdump/zdump.c
/*
* Copyright 2006 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
/*
* zdump 7.24
* Taken from elsie.nci.nih.gov to replace the existing Solaris zdump,
* which was based on an earlier version of the elsie code.
*
* For zdump 7.24, the following changes were made to the elsie code:
* locale/textdomain/messages to match existing Solaris style.
* Solaris verbose mode is documented to display the current time first.
* cstyle cleaned code.
* removed old locale/textdomain code.
*/
static char elsieid[] = "@(#)zdump.c 7.74";
/*
* This code has been made independent of the rest of the time
* conversion package to increase confidence in the verification it provides.
* You can use this code to help in verifying other implementations.
*/
#include "stdio.h" /* for stdout, stderr, perror */
#include "string.h" /* for strcpy */
#include "sys/types.h" /* for time_t */
#include "time.h" /* for struct tm */
#include "stdlib.h" /* for exit, malloc, atoi */
#include "locale.h" /* for setlocale, textdomain */
#include "libintl.h"
#include <ctype.h>
#include "tzfile.h" /* for defines */
#include <limits.h>
#ifndef ZDUMP_LO_YEAR
#define ZDUMP_LO_YEAR (-500)
#endif /* !defined ZDUMP_LO_YEAR */
#ifndef ZDUMP_HI_YEAR
#define ZDUMP_HI_YEAR 2500
#endif /* !defined ZDUMP_HI_YEAR */
#ifndef MAX_STRING_LENGTH
#define MAX_STRING_LENGTH 1024
#endif /* !defined MAX_STRING_LENGTH */
#ifndef TRUE
#define TRUE 1
#endif /* !defined TRUE */
#ifndef FALSE
#define FALSE 0
#endif /* !defined FALSE */
#ifndef isleap_sum
/*
* See tzfile.h for details on isleap_sum.
*/
#define isleap_sum(a, b) isleap((a) % 400 + (b) % 400)
#endif /* !defined isleap_sum */
#ifndef SECSPERDAY
#define SECSPERDAY ((long)SECSPERHOUR * HOURSPERDAY)
#endif
#define SECSPERNYEAR (SECSPERDAY * DAYSPERNYEAR)
#define SECSPERLYEAR (SECSPERNYEAR + SECSPERDAY)
#ifndef GNUC_or_lint
#ifdef lint
#define GNUC_or_lint
#else /* !defined lint */
#ifdef __GNUC__
#define GNUC_or_lint
#endif /* defined __GNUC__ */
#endif /* !defined lint */
#endif /* !defined GNUC_or_lint */
#ifndef INITIALIZE
#ifdef GNUC_or_lint
#define INITIALIZE(x) ((x) = 0)
#else /* !defined GNUC_or_lint */
#define INITIALIZE(x)
#endif /* !defined GNUC_or_lint */
#endif /* !defined INITIALIZE */
static time_t absolute_min_time;
static time_t absolute_max_time;
static size_t longest;
static char *progname;
static int warned;
static char *abbr(struct tm *);
static void abbrok(const char *, const char *);
static long delta(struct tm *, struct tm *);
static void dumptime(const struct tm *);
static time_t hunt(char *, time_t, time_t);
static void setabsolutes(void);
static void show(char *, time_t, int);
static void usage(void);
static const char *tformat(void);
static time_t yeartot(long y);
#ifndef TYPECHECK
#define my_localtime localtime
#else /* !defined TYPECHECK */
static struct tm *
my_localtime(tp)
time_t *tp;
{
register struct tm *tmp;
tmp = localtime(tp);
if (tp != NULL && tmp != NULL) {
struct tm tm;
register time_t t;
tm = *tmp;
t = mktime(&tm);
if (t - *tp >= 1 || *tp - t >= 1) {
(void) fflush(stdout);
(void) fprintf(stderr, "\n%s: ", progname);
(void) fprintf(stderr, tformat(), *tp);
(void) fprintf(stderr, " ->");
(void) fprintf(stderr, " year=%d", tmp->tm_year);
(void) fprintf(stderr, " mon=%d", tmp->tm_mon);
(void) fprintf(stderr, " mday=%d", tmp->tm_mday);
(void) fprintf(stderr, " hour=%d", tmp->tm_hour);
(void) fprintf(stderr, " min=%d", tmp->tm_min);
(void) fprintf(stderr, " sec=%d", tmp->tm_sec);
(void) fprintf(stderr, " isdst=%d", tmp->tm_isdst);
(void) fprintf(stderr, " -> ");
(void) fprintf(stderr, tformat(), t);
(void) fprintf(stderr, "\n");
}
}
return (tmp);
}
#endif /* !defined TYPECHECK */
static void
abbrok(abbrp, zone)
const char * const abbrp;
const char * const zone;
{
register const char *cp;
int error = 0;
if (warned)
return;
cp = abbrp;
while (isascii(*cp) && isalpha((unsigned char)*cp))
++cp;
(void) fflush(stdout);
if (cp - abbrp == 0) {
/*
* TRANSLATION_NOTE
* The first %s prints for the program name (zdump),
* the second %s prints the timezone name, the third
* %s prints the timezone abbreviation (tzname[0] or
* tzname[1]).
*/
(void) fprintf(stderr, gettext("%s: warning: zone \"%s\" "
"abbreviation \"%s\" lacks alphabetic at start\n"),
progname, zone, abbrp);
error = 1;
} else if (cp - abbrp < 3) {
(void) fprintf(stderr, gettext("%s: warning: zone \"%s\" "
"abbreviation \"%s\" has fewer than 3 alphabetics\n"),
progname, zone, abbrp);
error = 1;
} else if (cp - abbrp > 6) {
(void) fprintf(stderr, gettext("%s: warning: zone \"%s\" "
"abbreviation \"%s\" has more than 6 alphabetics\n"),
progname, zone, abbrp);
error = 1;
}
if (error == 0 && (*cp == '+' || *cp == '-')) {
++cp;
if (isascii(*cp) && isdigit((unsigned char)*cp))
if (*cp++ == '1' && *cp >= '0' && *cp <= '4')
++cp;
if (*cp != '\0') {
(void) fprintf(stderr, gettext("%s: warning: "
"zone \"%s\" abbreviation \"%s\" differs from "
"POSIX standard\n"), progname, zone, abbrp);
error = 1;
}
}
if (error)
warned = TRUE;
}
int
main(argc, argv)
int argc;
char *argv[];
{
register int i;
register int c;
register int vflag;
register char *cutarg;
register long cutloyear = ZDUMP_LO_YEAR;
register long cuthiyear = ZDUMP_HI_YEAR;
register time_t cutlotime;
register time_t cuthitime;
time_t now;
time_t t;
time_t newt;
struct tm tm;
struct tm newtm;
register struct tm *tmp;
register struct tm *newtmp;
INITIALIZE(cutlotime);
INITIALIZE(cuthitime);
(void) setlocale(LC_ALL, "");
#if !defined(TEXT_DOMAIN) /* Should be defined by cc -D */
#define TEXT_DOMAIN "SYS_TEST" /* Use this only if it weren't */
#endif
(void) textdomain(TEXT_DOMAIN);
progname = argv[0];
for (i = 1; i < argc; ++i)
if (strcmp(argv[i], "--version") == 0) {
(void) printf("%s\n", elsieid);
exit(EXIT_SUCCESS);
}
vflag = 0;
cutarg = NULL;
while ((c = getopt(argc, argv, "c:v")) == 'c' || c == 'v')
if (c == 'v')
vflag = 1;
else cutarg = optarg;
if (c != EOF ||
(optind == argc - 1 && strcmp(argv[optind], "=") == 0)) {
usage();
/* NOTREACHED */
}
if (vflag) {
if (cutarg != NULL) {
long lo;
long hi;
char dummy;
if (sscanf(cutarg, "%ld%c", &hi, &dummy) == 1) {
cuthiyear = hi;
} else if (sscanf(cutarg, "%ld,%ld%c",
&lo, &hi, &dummy) == 2) {
cutloyear = lo;
cuthiyear = hi;
} else {
(void) fprintf(stderr, gettext("%s: wild -c argument %s\n"),
progname, cutarg);
exit(EXIT_FAILURE);
}
}
setabsolutes();
cutlotime = yeartot(cutloyear);
cuthitime = yeartot(cuthiyear);
}
(void) time(&now);
longest = 0;
for (i = optind; i < argc; ++i)
if (strlen(argv[i]) > longest)
longest = strlen(argv[i]);
for (i = optind; i < argc; ++i) {
static char buf[MAX_STRING_LENGTH];
static char *tzp = NULL;
(void) unsetenv("TZ");
if (tzp != NULL)
free(tzp);
if ((tzp = malloc(3 + strlen(argv[i]) + 1)) == NULL) {
perror(progname);
exit(EXIT_FAILURE);
}
(void) strcpy(tzp, "TZ=");
(void) strcat(tzp, argv[i]);
if (putenv(tzp) != 0) {
perror(progname);
exit(EXIT_FAILURE);
}
if (!vflag) {
show(argv[i], now, FALSE);
continue;
}
#if defined(sun)
/*
* We show the current time first, probably because we froze
* the behavior of zdump some time ago and then it got
* changed.
*/
show(argv[i], now, TRUE);
#endif
warned = FALSE;
t = absolute_min_time;
show(argv[i], t, TRUE);
t += SECSPERHOUR * HOURSPERDAY;
show(argv[i], t, TRUE);
if (t < cutlotime)
t = cutlotime;
tmp = my_localtime(&t);
if (tmp != NULL) {
tm = *tmp;
(void) strncpy(buf, abbr(&tm), sizeof (buf) - 1);
}
for (;;) {
if (t >= cuthitime)
break;
/* check if newt will overrun maximum time_t value */
if (t > LONG_MAX - (SECSPERHOUR * 12))
break;
newt = t + SECSPERHOUR * 12;
if (newt >= cuthitime)
break;
newtmp = localtime(&newt);
if (newtmp != NULL)
newtm = *newtmp;
if ((tmp == NULL || newtmp == NULL) ? (tmp != newtmp) :
(delta(&newtm, &tm) != (newt - t) ||
newtm.tm_isdst != tm.tm_isdst ||
strcmp(abbr(&newtm), buf) != 0)) {
newt = hunt(argv[i], t, newt);
newtmp = localtime(&newt);
if (newtmp != NULL) {
newtm = *newtmp;
(void) strncpy(buf,
abbr(&newtm),
sizeof (buf) - 1);
}
}
t = newt;
tm = newtm;
tmp = newtmp;
}
t = absolute_max_time;
#if defined(sun)
show(argv[i], t, TRUE);
t -= SECSPERHOUR * HOURSPERDAY;
show(argv[i], t, TRUE);
#else /* !defined(sun) */
t -= SECSPERHOUR * HOURSPERDAY;
show(argv[i], t, TRUE);
t += SECSPERHOUR * HOURSPERDAY;
show(argv[i], t, TRUE);
#endif /* !defined(sun) */
}
if (fflush(stdout) || ferror(stdout)) {
(void) fprintf(stderr, "%s: ", progname);
(void) perror(gettext("Error writing standard output"));
exit(EXIT_FAILURE);
}
return (EXIT_SUCCESS);
}
static void
setabsolutes()
{
#if defined(sun)
absolute_min_time = LONG_MIN;
absolute_max_time = LONG_MAX;
#else
if (0.5 == (time_t)0.5) {
/*
* time_t is floating.
*/
if (sizeof (time_t) == sizeof (float)) {
absolute_min_time = (time_t)-FLT_MAX;
absolute_max_time = (time_t)FLT_MAX;
} else if (sizeof (time_t) == sizeof (double)) {
absolute_min_time = (time_t)-DBL_MAX;
absolute_max_time = (time_t)DBL_MAX;
} else {
(void) fprintf(stderr, gettext("%s: use of -v on "
"system with floating time_t other than float "
"or double\n"), progname);
exit(EXIT_FAILURE);
}
} else
/*CONSTANTCONDITION*/
if (0 > (time_t)-1) {
/*
* time_t is signed.
*/
register time_t hibit;
for (hibit = 1; (hibit * 2) != 0; hibit *= 2)
continue;
absolute_min_time = hibit;
absolute_max_time = -(hibit + 1);
} else {
/*
* time_t is unsigned.
*/
absolute_min_time = 0;
absolute_max_time = absolute_min_time - 1;
}
#endif
}
static time_t
yeartot(y)
const long y;
{
register long myy;
register long seconds;
register time_t t;
myy = EPOCH_YEAR;
t = 0;
while (myy != y) {
if (myy < y) {
seconds = isleap(myy) ? SECSPERLYEAR : SECSPERNYEAR;
++myy;
if (t > absolute_max_time - seconds) {
t = absolute_max_time;
break;
}
t += seconds;
} else {
--myy;
seconds = isleap(myy) ? SECSPERLYEAR : SECSPERNYEAR;
if (t < absolute_min_time + seconds) {
t = absolute_min_time;
break;
}
t -= seconds;
}
}
return (t);
}
static time_t
hunt(name, lot, hit)
char *name;
time_t lot;
time_t hit;
{
time_t t;
long diff;
struct tm lotm;
register struct tm *lotmp;
struct tm tm;
register struct tm *tmp;
char loab[MAX_STRING_LENGTH];
lotmp = my_localtime(&lot);
if (lotmp != NULL) {
lotm = *lotmp;
(void) strncpy(loab, abbr(&lotm), sizeof (loab) - 1);
}
for (;;) {
diff = (long)(hit - lot);
if (diff < 2)
break;
t = lot;
t += diff / 2;
if (t <= lot)
++t;
else if (t >= hit)
--t;
tmp = my_localtime(&t);
if (tmp != NULL)
tm = *tmp;
if ((lotmp == NULL || tmp == NULL) ? (lotmp == tmp) :
(delta(&tm, &lotm) == (t - lot) &&
tm.tm_isdst == lotm.tm_isdst &&
strcmp(abbr(&tm), loab) == 0)) {
lot = t;
lotm = tm;
lotmp = tmp;
} else hit = t;
}
show(name, lot, TRUE);
show(name, hit, TRUE);
return (hit);
}
/*
* Thanks to Paul Eggert for logic used in delta.
*/
static long
delta(newp, oldp)
struct tm *newp;
struct tm *oldp;
{
register long result;
register int tmy;
if (newp->tm_year < oldp->tm_year)
return (-delta(oldp, newp));
result = 0;
for (tmy = oldp->tm_year; tmy < newp->tm_year; ++tmy)
result += DAYSPERNYEAR + isleap_sum(tmy, TM_YEAR_BASE);
result += newp->tm_yday - oldp->tm_yday;
result *= HOURSPERDAY;
result += newp->tm_hour - oldp->tm_hour;
result *= MINSPERHOUR;
result += newp->tm_min - oldp->tm_min;
result *= SECSPERMIN;
result += newp->tm_sec - oldp->tm_sec;
return (result);
}
static void
show(zone, t, v)
char *zone;
time_t t;
int v;
{
register struct tm *tmp;
(void) printf("%-*s ", (int)longest, zone);
if (v) {
tmp = gmtime(&t);
if (tmp == NULL) {
(void) printf(tformat(), t);
} else {
dumptime(tmp);
(void) printf(" UTC");
}
(void) printf(" = ");
}
tmp = my_localtime(&t);
dumptime(tmp);
if (tmp != NULL) {
if (*abbr(tmp) != '\0')
(void) printf(" %s", abbr(tmp));
if (v) {
(void) printf(" isdst=%d", tmp->tm_isdst);
#ifdef TM_GMTOFF
(void) printf(" gmtoff=%ld", tmp->TM_GMTOFF);
#endif /* defined TM_GMTOFF */
}
}
(void) printf("\n");
if (tmp != NULL && *abbr(tmp) != '\0')
abbrok(abbr(tmp), zone);
}
static char *
abbr(tmp)
struct tm *tmp;
{
register char *result;
static char nada;
if (tmp->tm_isdst != 0 && tmp->tm_isdst != 1)
return (&nada);
result = tzname[tmp->tm_isdst];
return ((result == NULL) ? &nada : result);
}
/*
* The code below can fail on certain theoretical systems;
* it works on all known real-world systems as of 2004-12-30.
*/
static const char *
tformat()
{
#if defined(sun)
/* time_t is signed long */
return ("%ld");
#else
/*CONSTANTCONDITION*/
if (0.5 == (time_t)0.5) { /* floating */
/*CONSTANTCONDITION*/
if (sizeof (time_t) > sizeof (double))
return ("%Lg");
return ("%g");
}
/*CONSTANTCONDITION*/
if (0 > (time_t)-1) { /* signed */
/*CONSTANTCONDITION*/
if (sizeof (time_t) > sizeof (long))
return ("%lld");
/*CONSTANTCONDITION*/
if (sizeof (time_t) > sizeof (int))
return ("%ld");
return ("%d");
}
/*CONSTANTCONDITION*/
if (sizeof (time_t) > sizeof (unsigned long))
return ("%llu");
/*CONSTANTCONDITION*/
if (sizeof (time_t) > sizeof (unsigned int))
return ("%lu");
return ("%u");
#endif
}
static void
dumptime(timeptr)
register const struct tm *timeptr;
{
static const char wday_name[][3] = {
"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"
};
static const char mon_name[][3] = {
"Jan", "Feb", "Mar", "Apr", "May", "Jun",
"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
};
register const char *wn;
register const char *mn;
register int lead;
register int trail;
if (timeptr == NULL) {
(void) printf("NULL");
return;
}
/*
* The packaged versions of localtime and gmtime never put out-of-range
* values in tm_wday or tm_mon, but since this code might be compiled
* with other (perhaps experimental) versions, paranoia is in order.
*/
if (timeptr->tm_wday < 0 || timeptr->tm_wday >=
(int)(sizeof (wday_name) / sizeof (wday_name[0])))
wn = "???";
else wn = wday_name[timeptr->tm_wday];
if (timeptr->tm_mon < 0 || timeptr->tm_mon >=
(int)(sizeof (mon_name) / sizeof (mon_name[0])))
mn = "???";
else mn = mon_name[timeptr->tm_mon];
(void) printf("%.3s %.3s%3d %.2d:%.2d:%.2d ",
wn, mn,
timeptr->tm_mday, timeptr->tm_hour,
timeptr->tm_min, timeptr->tm_sec);
#define DIVISOR 10
trail = timeptr->tm_year % DIVISOR + TM_YEAR_BASE % DIVISOR;
lead = timeptr->tm_year / DIVISOR + TM_YEAR_BASE / DIVISOR +
trail / DIVISOR;
trail %= DIVISOR;
if (trail < 0 && lead > 0) {
trail += DIVISOR;
--lead;
} else if (lead < 0 && trail > 0) {
trail -= DIVISOR;
++lead;
}
if (lead == 0)
(void) printf("%d", trail);
else
(void) printf("%d%d", lead, ((trail < 0) ? -trail : trail));
}
static void
usage()
{
(void) fprintf(stderr, gettext(
"%s: [ --version ] [ -v ] [ -c [loyear,]hiyear ] zonename ...\n"),
progname);
exit(EXIT_FAILURE);
/* NOTREACHED */
}