[mirror_zfs-debian.git] / zfs / zcmd / 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 */
}
Commit	Line	Data
34dc7c2f BB	1	/*
	2	* Copyright 2006 Sun Microsystems, Inc. All rights reserved.
	3	* Use is subject to license terms.
	4	*/
	5
b128c09f	6	#pragma ident "%Z%%M% %I% %E% SMI"
34dc7c2f BB	7
	8	/*
	9	* zdump 7.24
	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.
	12	*
	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.
	18	*/
	19
	20	static char elsieid[] = "@(#)zdump.c 7.74";
	21
	22	/*
	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.
	26	*/
	27
	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 */
	34	#include "libintl.h"
	35	#include <ctype.h>
	36	#include "tzfile.h" /* for defines */
	37	#include <limits.h>
	38
	39	#ifndef ZDUMP_LO_YEAR
	40	#define ZDUMP_LO_YEAR (-500)
	41	#endif /* !defined ZDUMP_LO_YEAR */
	42
	43	#ifndef ZDUMP_HI_YEAR
	44	#define ZDUMP_HI_YEAR 2500
	45	#endif /* !defined ZDUMP_HI_YEAR */
	46
	47	#ifndef MAX_STRING_LENGTH
	48	#define MAX_STRING_LENGTH 1024
	49	#endif /* !defined MAX_STRING_LENGTH */
	50
	51	#ifndef TRUE
	52	#define TRUE 1
	53	#endif /* !defined TRUE */
	54
	55	#ifndef FALSE
	56	#define FALSE 0
	57	#endif /* !defined FALSE */
	58
	59	#ifndef isleap_sum
	60	/*
	61	* See tzfile.h for details on isleap_sum.
	62	*/
	63	#define isleap_sum(a, b) isleap((a) % 400 + (b) % 400)
	64	#endif /* !defined isleap_sum */
	65
	66	#ifndef SECSPERDAY
	67	#define SECSPERDAY ((long)SECSPERHOUR * HOURSPERDAY)
	68	#endif
	69	#define SECSPERNYEAR (SECSPERDAY * DAYSPERNYEAR)
	70	#define SECSPERLYEAR (SECSPERNYEAR + SECSPERDAY)
71
72	#ifndef GNUC_or_lint
73	#ifdef lint
74	#define GNUC_or_lint
75	#else /* !defined lint */
76	#ifdef __GNUC__
77	#define GNUC_or_lint
78	#endif /* defined __GNUC__ */
79	#endif /* !defined lint */
80	#endif /* !defined GNUC_or_lint */
81
82	#ifndef INITIALIZE
83	#ifdef GNUC_or_lint
84	#define INITIALIZE(x) ((x) = 0)
85	#else /* !defined GNUC_or_lint */
86	#define INITIALIZE(x)
87	#endif /* !defined GNUC_or_lint */
88	#endif /* !defined INITIALIZE */
89
90	static time_t absolute_min_time;
91	static time_t absolute_max_time;
92	static size_t longest;
93	static char *progname;
94	static int warned;
95
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);
106
107	#ifndef TYPECHECK
108	#define my_localtime localtime
109	#else /* !defined TYPECHECK */
110	static struct tm *
111	my_localtime(tp)
112	time_t *tp;
113	{
114	register struct tm *tmp;
115
116	tmp = localtime(tp);
117	if (tp != NULL && tmp != NULL) {
118	struct tm tm;
119	register time_t t;
120
121	tm = *tmp;
122	t = mktime(&tm);
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");
138	}
139	}
140	return (tmp);
141	}
142	#endif /* !defined TYPECHECK */
143
144	static void
145	abbrok(abbrp, zone)
146	const char * const abbrp;
147	const char * const zone;
148	{
149	register const char *cp;
150	int error = 0;
151
152	if (warned)
153	return;
154	cp = abbrp;
155	while (isascii(cp) && isalpha((unsigned char)cp))
156	++cp;
157	(void) fflush(stdout);
158	if (cp - abbrp == 0) {
159	/*
160	* TRANSLATION_NOTE
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
164	* tzname[1]).
165	*/
166	(void) fprintf(stderr, gettext("%s: warning: zone \"%s\" "
167	"abbreviation \"%s\" lacks alphabetic at start\n"),
168	progname, zone, abbrp);
169	error = 1;
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);
174	error = 1;
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);
179	error = 1;
180	}
181	if (error == 0 && (cp == '+' \|\| cp == '-')) {
182	++cp;
183	if (isascii(cp) && isdigit((unsigned char)cp))
184	if (cp++ == '1' && cp >= '0' && *cp <= '4')
185	++cp;
186	if (*cp != '\0') {
187	(void) fprintf(stderr, gettext("%s: warning: "
188	"zone \"%s\" abbreviation \"%s\" differs from "
189	"POSIX standard\n"), progname, zone, abbrp);
190	error = 1;
191	}
192	}
193	if (error)
194	warned = TRUE;
195	}
196
197	int
198	main(argc, argv)
199	int argc;
200	char *argv[];
201	{
202	register int i;
203	register int c;
204	register int vflag;
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;
210	time_t now;
211	time_t t;
212	time_t newt;
213	struct tm tm;
214	struct tm newtm;
215	register struct tm *tmp;
216	register struct tm *newtmp;
217
218	INITIALIZE(cutlotime);
219	INITIALIZE(cuthitime);
220
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 */
224	#endif
225	(void) textdomain(TEXT_DOMAIN);
226
227	progname = argv[0];
228	for (i = 1; i < argc; ++i)
229	if (strcmp(argv[i], "--version") == 0) {
230	(void) printf("%s\n", elsieid);
231	exit(EXIT_SUCCESS);
232	}
233	vflag = 0;
234	cutarg = NULL;
235	while ((c = getopt(argc, argv, "c:v")) == 'c' \|\| c == 'v')
236	if (c == 'v')
237	vflag = 1;
238	else cutarg = optarg;
239	if (c != EOF \|\|
240	(optind == argc - 1 && strcmp(argv[optind], "=") == 0)) {
241	usage();
242	/* NOTREACHED */
243	}
244	if (vflag) {
245	if (cutarg != NULL) {
246	long lo;
247	long hi;
248	char dummy;
249
250	if (sscanf(cutarg, "%ld%c", &hi, &dummy) == 1) {
251	cuthiyear = hi;
252	} else if (sscanf(cutarg, "%ld,%ld%c",
253	&lo, &hi, &dummy) == 2) {
254	cutloyear = lo;
255	cuthiyear = hi;
256	} else {
257	(void) fprintf(stderr, gettext("%s: wild -c argument %s\n"),
258	progname, cutarg);
259	exit(EXIT_FAILURE);
260	}
261	}
262	setabsolutes();
263	cutlotime = yeartot(cutloyear);
264	cuthitime = yeartot(cuthiyear);
265	}
266	(void) time(&now);
267	longest = 0;
268	for (i = optind; i < argc; ++i)
269	if (strlen(argv[i]) > longest)
270	longest = strlen(argv[i]);
271
272	for (i = optind; i < argc; ++i) {
273	static char buf[MAX_STRING_LENGTH];
274	static char *tzp = NULL;
275
276	(void) unsetenv("TZ");
277	if (tzp != NULL)
278	free(tzp);
279	if ((tzp = malloc(3 + strlen(argv[i]) + 1)) == NULL) {
280	perror(progname);
281	exit(EXIT_FAILURE);
282	}
283	(void) strcpy(tzp, "TZ=");
284	(void) strcat(tzp, argv[i]);
285	if (putenv(tzp) != 0) {
286	perror(progname);
287	exit(EXIT_FAILURE);
288	}
289	if (!vflag) {
290	show(argv[i], now, FALSE);
291	continue;
292	}
293
294	#if defined(sun)
295	/*
296	* We show the current time first, probably because we froze
297	* the behavior of zdump some time ago and then it got
298	* changed.
299	*/
300	show(argv[i], now, TRUE);
301	#endif
302	warned = FALSE;
303	t = absolute_min_time;
304	show(argv[i], t, TRUE);
305	t += SECSPERHOUR * HOURSPERDAY;
306	show(argv[i], t, TRUE);
307	if (t < cutlotime)
308	t = cutlotime;
309	tmp = my_localtime(&t);
310	if (tmp != NULL) {
311	tm = *tmp;
312	(void) strncpy(buf, abbr(&tm), sizeof (buf) - 1);
313	}
314	for (;;) {
315	if (t >= cuthitime)
316	break;
317	/* check if newt will overrun maximum time_t value */
318	if (t > LONG_MAX - (SECSPERHOUR * 12))
319	break;
320	newt = t + SECSPERHOUR * 12;
321	if (newt >= cuthitime)
322	break;
323	newtmp = localtime(&newt);
324	if (newtmp != NULL)
325	newtm = *newtmp;
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) {
333	newtm = *newtmp;
334	(void) strncpy(buf,
335	abbr(&newtm),
336	sizeof (buf) - 1);
337	}
338	}
339	t = newt;
340	tm = newtm;
341	tmp = newtmp;
342	}
343	t = absolute_max_time;
344	#if defined(sun)
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) */
354	}
355	if (fflush(stdout) \|\| ferror(stdout)) {
356	(void) fprintf(stderr, "%s: ", progname);
357	(void) perror(gettext("Error writing standard output"));
358	exit(EXIT_FAILURE);
359	}
360	return (EXIT_SUCCESS);
361	}
362
363	static void
364	setabsolutes()
365	{
366	#if defined(sun)
367	absolute_min_time = LONG_MIN;
368	absolute_max_time = LONG_MAX;
369	#else
370	if (0.5 == (time_t)0.5) {
371	/*
372	* time_t is floating.
373	*/
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;
380	} else {
381	(void) fprintf(stderr, gettext("%s: use of -v on "
382	"system with floating time_t other than float "
383	"or double\n"), progname);
384	exit(EXIT_FAILURE);
385	}
386	} else
387	/CONSTANTCONDITION/
388	if (0 > (time_t)-1) {
389	/*
390	* time_t is signed.
391	*/
392	register time_t hibit;
393
394	for (hibit = 1; (hibit * 2) != 0; hibit *= 2)
395	continue;
396	absolute_min_time = hibit;
397	absolute_max_time = -(hibit + 1);
398	} else {
399	/*
400	* time_t is unsigned.
401	*/
402	absolute_min_time = 0;
403	absolute_max_time = absolute_min_time - 1;
404	}
405	#endif
406	}
407
408	static time_t
409	yeartot(y)
410	const long y;
411	{
412	register long myy;
413	register long seconds;
414	register time_t t;
415
416	myy = EPOCH_YEAR;
417	t = 0;
418	while (myy != y) {
419	if (myy < y) {
420	seconds = isleap(myy) ? SECSPERLYEAR : SECSPERNYEAR;
421	++myy;
422	if (t > absolute_max_time - seconds) {
423	t = absolute_max_time;
424	break;
425	}
426	t += seconds;
427	} else {
428	--myy;
429	seconds = isleap(myy) ? SECSPERLYEAR : SECSPERNYEAR;
430	if (t < absolute_min_time + seconds) {
431	t = absolute_min_time;
432	break;
433	}
434	t -= seconds;
435	}
436	}
437	return (t);
438	}
439
440	static time_t
441	hunt(name, lot, hit)
442	char *name;
443	time_t lot;
444	time_t hit;
445	{
446	time_t t;
447	long diff;
448	struct tm lotm;
449	register struct tm *lotmp;
450	struct tm tm;
451	register struct tm *tmp;
452	char loab[MAX_STRING_LENGTH];
453
454	lotmp = my_localtime(&lot);
455	if (lotmp != NULL) {
456	lotm = *lotmp;
457	(void) strncpy(loab, abbr(&lotm), sizeof (loab) - 1);
458	}
459	for (;;) {
460	diff = (long)(hit - lot);
461	if (diff < 2)
462	break;
463	t = lot;
464	t += diff / 2;
465	if (t <= lot)
466	++t;
467	else if (t >= hit)
468	--t;
469	tmp = my_localtime(&t);
470	if (tmp != NULL)
471	tm = *tmp;
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)) {
476	lot = t;
477	lotm = tm;
478	lotmp = tmp;
479	} else hit = t;
480	}
481	show(name, lot, TRUE);
482	show(name, hit, TRUE);
483	return (hit);
484	}
485
486	/*
487	* Thanks to Paul Eggert for logic used in delta.
488	*/
489
490	static long
491	delta(newp, oldp)
492	struct tm *newp;
493	struct tm *oldp;
494	{
495	register long result;
496	register int tmy;
497
498	if (newp->tm_year < oldp->tm_year)
499	return (-delta(oldp, newp));
500	result = 0;
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;
510	return (result);
511	}
512
513	static void
514	show(zone, t, v)
515	char *zone;
516	time_t t;
517	int v;
518	{
519	register struct tm *tmp;
520
521	(void) printf("%-*s ", (int)longest, zone);
522	if (v) {
523	tmp = gmtime(&t);
524	if (tmp == NULL) {
525	(void) printf(tformat(), t);
526	} else {
527	dumptime(tmp);
528	(void) printf(" UTC");
529	}
530	(void) printf(" = ");
531	}
532	tmp = my_localtime(&t);
533	dumptime(tmp);
534	if (tmp != NULL) {
535	if (*abbr(tmp) != '\0')
536	(void) printf(" %s", abbr(tmp));
537	if (v) {
538	(void) printf(" isdst=%d", tmp->tm_isdst);
539	#ifdef TM_GMTOFF
540	(void) printf(" gmtoff=%ld", tmp->TM_GMTOFF);
541	#endif /* defined TM_GMTOFF */
542	}
543	}
544	(void) printf("\n");
545	if (tmp != NULL && *abbr(tmp) != '\0')
546	abbrok(abbr(tmp), zone);
547	}
548
549	static char *
550	abbr(tmp)
551	struct tm *tmp;
552	{
553	register char *result;
554	static char nada;
555
556	if (tmp->tm_isdst != 0 && tmp->tm_isdst != 1)
557	return (&nada);
558	result = tzname[tmp->tm_isdst];
559	return ((result == NULL) ? &nada : result);
560	}
561
562	/*
563	* The code below can fail on certain theoretical systems;
564	* it works on all known real-world systems as of 2004-12-30.
565	*/
566
567	static const char *
568	tformat()
569	{
570	#if defined(sun)
571	/* time_t is signed long */
572	return ("%ld");
573	#else
574	/CONSTANTCONDITION/
575	if (0.5 == (time_t)0.5) { /* floating */
576	/CONSTANTCONDITION/
577	if (sizeof (time_t) > sizeof (double))
578	return ("%Lg");
579	return ("%g");
580	}
581	/CONSTANTCONDITION/
582	if (0 > (time_t)-1) { /* signed */
583	/CONSTANTCONDITION/
584	if (sizeof (time_t) > sizeof (long))
585	return ("%lld");
586	/CONSTANTCONDITION/
587	if (sizeof (time_t) > sizeof (int))
588	return ("%ld");
589	return ("%d");
590	}
591	/CONSTANTCONDITION/
592	if (sizeof (time_t) > sizeof (unsigned long))
593	return ("%llu");
594	/CONSTANTCONDITION/
595	if (sizeof (time_t) > sizeof (unsigned int))
596	return ("%lu");
597	return ("%u");
598	#endif
599	}
600
601	static void
602	dumptime(timeptr)
603	register const struct tm *timeptr;
604	{
605	static const char wday_name[][3] = {
606	"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"
607	};
608	static const char mon_name[][3] = {
609	"Jan", "Feb", "Mar", "Apr", "May", "Jun",
610	"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
611	};
612	register const char *wn;
613	register const char *mn;
614	register int lead;
615	register int trail;
616
617	if (timeptr == NULL) {
618	(void) printf("NULL");
619	return;
620	}
621	/*
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.
625	*/
626	if (timeptr->tm_wday < 0 \|\| timeptr->tm_wday >=
627	(int)(sizeof (wday_name) / sizeof (wday_name[0])))
628	wn = "???";
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])))
632	mn = "???";
633	else mn = mon_name[timeptr->tm_mon];
634	(void) printf("%.3s %.3s%3d %.2d:%.2d:%.2d ",
635	wn, mn,
636	timeptr->tm_mday, timeptr->tm_hour,
637	timeptr->tm_min, timeptr->tm_sec);
638	#define DIVISOR 10
639	trail = timeptr->tm_year % DIVISOR + TM_YEAR_BASE % DIVISOR;
640	lead = timeptr->tm_year / DIVISOR + TM_YEAR_BASE / DIVISOR +
641	trail / DIVISOR;
642	trail %= DIVISOR;
643	if (trail < 0 && lead > 0) {
644	trail += DIVISOR;
645	--lead;
646	} else if (lead < 0 && trail > 0) {
647	trail -= DIVISOR;
648	++lead;
649	}
650	if (lead == 0)
651	(void) printf("%d", trail);
652	else
653	(void) printf("%d%d", lead, ((trail < 0) ? -trail : trail));
654	}
655
656	static void
657	usage()
658	{
659	(void) fprintf(stderr, gettext(
660	"%s: [ --version ] [ -v ] [ -c [loyear,]hiyear ] zonename ...\n"),
661	progname);
662	exit(EXIT_FAILURE);
663	/* NOTREACHED */
664	}