xref: /illumos-gate/usr/src/cmd/date/date.c (revision 2f4149ea09454b3def6fe8245992f7e26571a1e8)
17c478bd9Sstevel@tonic-gate /*
27c478bd9Sstevel@tonic-gate  * CDDL HEADER START
37c478bd9Sstevel@tonic-gate  *
47c478bd9Sstevel@tonic-gate  * The contents of this file are subject to the terms of the
57c478bd9Sstevel@tonic-gate  * Common Development and Distribution License, Version 1.0 only
67c478bd9Sstevel@tonic-gate  * (the "License").  You may not use this file except in compliance
77c478bd9Sstevel@tonic-gate  * with the License.
87c478bd9Sstevel@tonic-gate  *
97c478bd9Sstevel@tonic-gate  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
107c478bd9Sstevel@tonic-gate  * or http://www.opensolaris.org/os/licensing.
117c478bd9Sstevel@tonic-gate  * See the License for the specific language governing permissions
127c478bd9Sstevel@tonic-gate  * and limitations under the License.
137c478bd9Sstevel@tonic-gate  *
147c478bd9Sstevel@tonic-gate  * When distributing Covered Code, include this CDDL HEADER in each
157c478bd9Sstevel@tonic-gate  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
167c478bd9Sstevel@tonic-gate  * If applicable, add the following below this CDDL HEADER, with the
177c478bd9Sstevel@tonic-gate  * fields enclosed by brackets "[]" replaced with your own identifying
187c478bd9Sstevel@tonic-gate  * information: Portions Copyright [yyyy] [name of copyright owner]
197c478bd9Sstevel@tonic-gate  *
207c478bd9Sstevel@tonic-gate  * CDDL HEADER END
217c478bd9Sstevel@tonic-gate  */
227c478bd9Sstevel@tonic-gate /*
237c478bd9Sstevel@tonic-gate  * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
247c478bd9Sstevel@tonic-gate  * Use is subject to license terms.
257c478bd9Sstevel@tonic-gate  */
2663ff6dceSGarrett D'Amore /*
27bde2df36SYuri Pankov  * Copyright 2012 Nexenta Systems, Inc. All rights reserved.
2863ff6dceSGarrett D'Amore  */
2972fb660eSKeith M Wesolowski /*
30*2f4149eaSRobert Mustacchi  * Copyright (c) 2017, Joyent, Inc.
3172fb660eSKeith M Wesolowski  */
327c478bd9Sstevel@tonic-gate /*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
337c478bd9Sstevel@tonic-gate /*	  All Rights Reserved  	*/
347c478bd9Sstevel@tonic-gate 
357c478bd9Sstevel@tonic-gate /*
367c478bd9Sstevel@tonic-gate  * University Copyright- Copyright (c) 1982, 1986, 1988
377c478bd9Sstevel@tonic-gate  * The Regents of the University of California
387c478bd9Sstevel@tonic-gate  * All Rights Reserved
397c478bd9Sstevel@tonic-gate  *
407c478bd9Sstevel@tonic-gate  * University Acknowledgment- Portions of this document are derived from
417c478bd9Sstevel@tonic-gate  * software developed by the University of California, Berkeley, and its
427c478bd9Sstevel@tonic-gate  * contributors.
437c478bd9Sstevel@tonic-gate  */
447c478bd9Sstevel@tonic-gate 
457c478bd9Sstevel@tonic-gate /*
467c478bd9Sstevel@tonic-gate  *	date - with format capabilities and international flair
477c478bd9Sstevel@tonic-gate  */
487c478bd9Sstevel@tonic-gate 
497c478bd9Sstevel@tonic-gate #include	<locale.h>
507c478bd9Sstevel@tonic-gate #include	<fcntl.h>
517c478bd9Sstevel@tonic-gate #include	<langinfo.h>
527c478bd9Sstevel@tonic-gate #include	<stdio.h>
537c478bd9Sstevel@tonic-gate #include	<stdlib.h>
547c478bd9Sstevel@tonic-gate #include	<string.h>
557c478bd9Sstevel@tonic-gate #include	<time.h>
567c478bd9Sstevel@tonic-gate #include	<unistd.h>
577c478bd9Sstevel@tonic-gate #include	<sys/time.h>
587c478bd9Sstevel@tonic-gate #include	<sys/types.h>
59*2f4149eaSRobert Mustacchi #include	<sys/stat.h>
607c478bd9Sstevel@tonic-gate #include	<ctype.h>
61*2f4149eaSRobert Mustacchi #include	<errno.h>
627c478bd9Sstevel@tonic-gate #include	<utmpx.h>
637c478bd9Sstevel@tonic-gate #include	<tzfile.h>
647c478bd9Sstevel@tonic-gate 
657c478bd9Sstevel@tonic-gate #define	year_size(A)	((isleap(A)) ? 366 : 365)
667c478bd9Sstevel@tonic-gate static 	char	buf[BUFSIZ];
677c478bd9Sstevel@tonic-gate static	time_t	clock_val;
687c478bd9Sstevel@tonic-gate static  short	month_size[12] =
697c478bd9Sstevel@tonic-gate 	{ 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
707c478bd9Sstevel@tonic-gate static  struct  utmpx wtmpx[2] = {
717c478bd9Sstevel@tonic-gate 	{"", "", OTIME_MSG, 0, OLD_TIME, 0, 0, 0},
727c478bd9Sstevel@tonic-gate 	{"", "", NTIME_MSG, 0, NEW_TIME, 0, 0, 0}
737c478bd9Sstevel@tonic-gate 	};
747c478bd9Sstevel@tonic-gate static char *usage =
75*2f4149eaSRobert Mustacchi 	"usage:\tdate [-u] mmddHHMM[[cc]yy][.SS]\n"
76*2f4149eaSRobert Mustacchi 	"\tdate [-Ru] [-r seconds | filename] [+format]\n"
777c478bd9Sstevel@tonic-gate 	"\tdate -a [-]sss[.fff]\n";
787c478bd9Sstevel@tonic-gate static int uflag = 0;
7963ff6dceSGarrett D'Amore static int Rflag = 0;
80*2f4149eaSRobert Mustacchi static int rflag = 0;
817c478bd9Sstevel@tonic-gate 
827c478bd9Sstevel@tonic-gate static int get_adj(char *, struct timeval *);
837c478bd9Sstevel@tonic-gate static int setdate(struct tm *, char *);
8472fb660eSKeith M Wesolowski static void fmt_extensions(char *, size_t,
8572fb660eSKeith M Wesolowski     const char *, const struct timespec *);
867c478bd9Sstevel@tonic-gate 
877c478bd9Sstevel@tonic-gate int
887c478bd9Sstevel@tonic-gate main(int argc, char **argv)
897c478bd9Sstevel@tonic-gate {
907c478bd9Sstevel@tonic-gate 	struct tm *tp, tm;
917c478bd9Sstevel@tonic-gate 	struct timeval tv;
92*2f4149eaSRobert Mustacchi 	char *fmt, *eptr;
9372fb660eSKeith M Wesolowski 	char fmtbuf[BUFSIZ];
947c478bd9Sstevel@tonic-gate 	int c, aflag = 0, illflag = 0;
9572fb660eSKeith M Wesolowski 	struct timespec ts;
967c478bd9Sstevel@tonic-gate 
977c478bd9Sstevel@tonic-gate 	(void) setlocale(LC_ALL, "");
987c478bd9Sstevel@tonic-gate 
997c478bd9Sstevel@tonic-gate #if !defined(TEXT_DOMAIN)
1007c478bd9Sstevel@tonic-gate #define	TEXT_DOMAIN "SYS_TEST"
1017c478bd9Sstevel@tonic-gate #endif
1027c478bd9Sstevel@tonic-gate 	(void) textdomain(TEXT_DOMAIN);
1037c478bd9Sstevel@tonic-gate 
104*2f4149eaSRobert Mustacchi 	while ((c = getopt(argc, argv, "a:uRr:")) != EOF)
1057c478bd9Sstevel@tonic-gate 		switch (c) {
1067c478bd9Sstevel@tonic-gate 		case 'a':
1077c478bd9Sstevel@tonic-gate 			aflag++;
1087c478bd9Sstevel@tonic-gate 			if (get_adj(optarg, &tv) < 0) {
1097c478bd9Sstevel@tonic-gate 				(void) fprintf(stderr,
1107c478bd9Sstevel@tonic-gate 				    gettext("date: invalid argument -- %s\n"),
11163ff6dceSGarrett D'Amore 				    optarg);
1127c478bd9Sstevel@tonic-gate 				illflag++;
1137c478bd9Sstevel@tonic-gate 			}
1147c478bd9Sstevel@tonic-gate 			break;
1157c478bd9Sstevel@tonic-gate 		case 'u':
1167c478bd9Sstevel@tonic-gate 			uflag++;
1177c478bd9Sstevel@tonic-gate 			break;
11863ff6dceSGarrett D'Amore 		case 'R':
11963ff6dceSGarrett D'Amore 			Rflag++;
12063ff6dceSGarrett D'Amore 			break;
121*2f4149eaSRobert Mustacchi 		case 'r':
122*2f4149eaSRobert Mustacchi 
123*2f4149eaSRobert Mustacchi 			/*
124*2f4149eaSRobert Mustacchi 			 * BSD originally used -r to specify a unix time. GNU
125*2f4149eaSRobert Mustacchi 			 * used -r to specify a reference to a file. Now, like
126*2f4149eaSRobert Mustacchi 			 * some BSDs we attempt to parse the time. If we can,
127*2f4149eaSRobert Mustacchi 			 * then we use that, otherwise we fall back and treat it
128*2f4149eaSRobert Mustacchi 			 * like GNU.
129*2f4149eaSRobert Mustacchi 			 */
130*2f4149eaSRobert Mustacchi 			rflag++;
131*2f4149eaSRobert Mustacchi 			errno = 0;
132*2f4149eaSRobert Mustacchi 			ts.tv_sec = strtol(optarg, &eptr, 0);
133*2f4149eaSRobert Mustacchi 			if (errno == EINVAL || *eptr != '\0') {
134*2f4149eaSRobert Mustacchi 				struct stat st;
135*2f4149eaSRobert Mustacchi 				if (stat(optarg, &st) == 0) {
136*2f4149eaSRobert Mustacchi 					ts.tv_sec = st.st_mtime;
137*2f4149eaSRobert Mustacchi 				} else {
138*2f4149eaSRobert Mustacchi 					(void) fprintf(stderr,
139*2f4149eaSRobert Mustacchi 					    gettext("date: failed to get stat "
140*2f4149eaSRobert Mustacchi 					    "information about %s: %s\n"),
141*2f4149eaSRobert Mustacchi 					    optarg, strerror(errno));
142*2f4149eaSRobert Mustacchi 					exit(1);
143*2f4149eaSRobert Mustacchi 				}
144*2f4149eaSRobert Mustacchi 			} else if (errno != 0) {
145*2f4149eaSRobert Mustacchi 				(void) fprintf(stderr,
146*2f4149eaSRobert Mustacchi 				    gettext("date: failed to parse -r "
147*2f4149eaSRobert Mustacchi 				    "argument: %s\n"), optarg);
148*2f4149eaSRobert Mustacchi 				exit(1);
149*2f4149eaSRobert Mustacchi 			}
150*2f4149eaSRobert Mustacchi 			break;
1517c478bd9Sstevel@tonic-gate 		default:
1527c478bd9Sstevel@tonic-gate 			illflag++;
1537c478bd9Sstevel@tonic-gate 		}
1547c478bd9Sstevel@tonic-gate 
1557c478bd9Sstevel@tonic-gate 	argc -= optind;
1567c478bd9Sstevel@tonic-gate 	argv  = &argv[optind];
1577c478bd9Sstevel@tonic-gate 
158*2f4149eaSRobert Mustacchi 	/* -a is mutually exclusive with -u, -R, and -r */
1597c478bd9Sstevel@tonic-gate 	if (uflag && aflag)
1607c478bd9Sstevel@tonic-gate 		illflag++;
16163ff6dceSGarrett D'Amore 	if (Rflag && aflag)
16263ff6dceSGarrett D'Amore 		illflag++;
163*2f4149eaSRobert Mustacchi 	if (rflag && aflag)
164*2f4149eaSRobert Mustacchi 		illflag++;
1657c478bd9Sstevel@tonic-gate 
1667c478bd9Sstevel@tonic-gate 	if (illflag) {
1677c478bd9Sstevel@tonic-gate 		(void) fprintf(stderr, gettext(usage));
1687c478bd9Sstevel@tonic-gate 		exit(1);
1697c478bd9Sstevel@tonic-gate 	}
1707c478bd9Sstevel@tonic-gate 
171*2f4149eaSRobert Mustacchi 	if (rflag == 0) {
172*2f4149eaSRobert Mustacchi 		if (clock_gettime(CLOCK_REALTIME, &ts) != 0) {
173*2f4149eaSRobert Mustacchi 			perror(gettext("date: Failed to obtain system time"));
174*2f4149eaSRobert Mustacchi 			exit(1);
175*2f4149eaSRobert Mustacchi 		}
17672fb660eSKeith M Wesolowski 	}
17772fb660eSKeith M Wesolowski 	clock_val = ts.tv_sec;
1787c478bd9Sstevel@tonic-gate 
1797c478bd9Sstevel@tonic-gate 	if (aflag) {
1807c478bd9Sstevel@tonic-gate 		if (adjtime(&tv, 0) < 0) {
1817c478bd9Sstevel@tonic-gate 			perror(gettext("date: Failed to adjust date"));
1827c478bd9Sstevel@tonic-gate 			exit(1);
1837c478bd9Sstevel@tonic-gate 		}
1847c478bd9Sstevel@tonic-gate 		exit(0);
1857c478bd9Sstevel@tonic-gate 	}
1867c478bd9Sstevel@tonic-gate 
1877c478bd9Sstevel@tonic-gate 	if (argc > 0) {
1887c478bd9Sstevel@tonic-gate 		if (*argv[0] == '+')
1897c478bd9Sstevel@tonic-gate 			fmt = &argv[0][1];
1907c478bd9Sstevel@tonic-gate 		else {
1917c478bd9Sstevel@tonic-gate 			if (setdate(localtime(&clock_val), argv[0])) {
1927c478bd9Sstevel@tonic-gate 				(void) fprintf(stderr, gettext(usage));
1937c478bd9Sstevel@tonic-gate 				exit(1);
1947c478bd9Sstevel@tonic-gate 			}
1957c478bd9Sstevel@tonic-gate 			fmt = nl_langinfo(_DATE_FMT);
1967c478bd9Sstevel@tonic-gate 		}
19763ff6dceSGarrett D'Amore 	} else if (Rflag) {
19863ff6dceSGarrett D'Amore 		fmt = "%a, %d %h %Y %H:%M:%S %z";
1997c478bd9Sstevel@tonic-gate 	} else
2007c478bd9Sstevel@tonic-gate 		fmt = nl_langinfo(_DATE_FMT);
2017c478bd9Sstevel@tonic-gate 
20272fb660eSKeith M Wesolowski 	fmt_extensions(fmtbuf, sizeof (fmtbuf), fmt, &ts);
20372fb660eSKeith M Wesolowski 
2047c478bd9Sstevel@tonic-gate 	if (uflag) {
2057c478bd9Sstevel@tonic-gate 		(void) putenv("TZ=GMT0");
2067c478bd9Sstevel@tonic-gate 		tzset();
2077c478bd9Sstevel@tonic-gate 		tp = gmtime(&clock_val);
2087c478bd9Sstevel@tonic-gate 	} else
2097c478bd9Sstevel@tonic-gate 		tp = localtime(&clock_val);
2107c478bd9Sstevel@tonic-gate 	(void) memcpy(&tm, tp, sizeof (struct tm));
21172fb660eSKeith M Wesolowski 	(void) strftime(buf, BUFSIZ, fmtbuf, &tm);
2127c478bd9Sstevel@tonic-gate 
2137c478bd9Sstevel@tonic-gate 	(void) puts(buf);
2147c478bd9Sstevel@tonic-gate 
2157c478bd9Sstevel@tonic-gate 	return (0);
2167c478bd9Sstevel@tonic-gate }
2177c478bd9Sstevel@tonic-gate 
2187c478bd9Sstevel@tonic-gate int
2197c478bd9Sstevel@tonic-gate setdate(struct tm *current_date, char *date)
2207c478bd9Sstevel@tonic-gate {
2217c478bd9Sstevel@tonic-gate 	int	i;
2227c478bd9Sstevel@tonic-gate 	int	mm;
2237c478bd9Sstevel@tonic-gate 	int	hh;
2247c478bd9Sstevel@tonic-gate 	int	min;
2257c478bd9Sstevel@tonic-gate 	int	sec = 0;
2267c478bd9Sstevel@tonic-gate 	char	*secptr;
2277c478bd9Sstevel@tonic-gate 	int	yy;
2287c478bd9Sstevel@tonic-gate 	int	dd	= 0;
2297c478bd9Sstevel@tonic-gate 	int	minidx	= 6;
2307c478bd9Sstevel@tonic-gate 	int	len;
2317c478bd9Sstevel@tonic-gate 	int	dd_check;
2327c478bd9Sstevel@tonic-gate 
2337c478bd9Sstevel@tonic-gate 	/*  Parse date string  */
2347c478bd9Sstevel@tonic-gate 	if ((secptr = strchr(date, '.')) != NULL && strlen(&secptr[1]) == 2 &&
2357c478bd9Sstevel@tonic-gate 	    isdigit(secptr[1]) && isdigit(secptr[2]) &&
2367c478bd9Sstevel@tonic-gate 	    (sec = atoi(&secptr[1])) >= 0 && sec < 60)
2377c478bd9Sstevel@tonic-gate 		secptr[0] = '\0';	/* eat decimal point only on success */
2387c478bd9Sstevel@tonic-gate 
2397c478bd9Sstevel@tonic-gate 	len = strlen(date);
2407c478bd9Sstevel@tonic-gate 
2417c478bd9Sstevel@tonic-gate 	for (i = 0; i < len; i++) {
2427c478bd9Sstevel@tonic-gate 		if (!isdigit(date[i])) {
2437c478bd9Sstevel@tonic-gate 			(void) fprintf(stderr,
2447c478bd9Sstevel@tonic-gate 			gettext("date: bad conversion\n"));
2457c478bd9Sstevel@tonic-gate 			exit(1);
2467c478bd9Sstevel@tonic-gate 		}
2477c478bd9Sstevel@tonic-gate 	}
2487c478bd9Sstevel@tonic-gate 	switch (strlen(date)) {
2497c478bd9Sstevel@tonic-gate 	case 12:
2507c478bd9Sstevel@tonic-gate 		yy = atoi(&date[8]);
2517c478bd9Sstevel@tonic-gate 		date[8] = '\0';
2527c478bd9Sstevel@tonic-gate 		break;
2537c478bd9Sstevel@tonic-gate 	case 10:
2547c478bd9Sstevel@tonic-gate 		/*
2557c478bd9Sstevel@tonic-gate 		 * The YY format has the following representation:
2567c478bd9Sstevel@tonic-gate 		 * 00-68 = 2000 thru 2068
2577c478bd9Sstevel@tonic-gate 		 * 69-99 = 1969 thru 1999
2587c478bd9Sstevel@tonic-gate 		 */
2597c478bd9Sstevel@tonic-gate 		if (atoi(&date[8]) <= 68) {
2607c478bd9Sstevel@tonic-gate 			yy = 1900 + (atoi(&date[8]) + 100);
2617c478bd9Sstevel@tonic-gate 		} else {
2627c478bd9Sstevel@tonic-gate 			yy = 1900 + atoi(&date[8]);
2637c478bd9Sstevel@tonic-gate 		}
2647c478bd9Sstevel@tonic-gate 		date[8] = '\0';
2657c478bd9Sstevel@tonic-gate 		break;
2667c478bd9Sstevel@tonic-gate 	case 8:
2677c478bd9Sstevel@tonic-gate 		yy = 1900 + current_date->tm_year;
2687c478bd9Sstevel@tonic-gate 		break;
2697c478bd9Sstevel@tonic-gate 	case 4:
2707c478bd9Sstevel@tonic-gate 		yy = 1900 + current_date->tm_year;
2717c478bd9Sstevel@tonic-gate 		mm = current_date->tm_mon + 1; 	/* tm_mon goes from 1 to 11 */
2727c478bd9Sstevel@tonic-gate 		dd = current_date->tm_mday;
2737c478bd9Sstevel@tonic-gate 		minidx = 2;
2747c478bd9Sstevel@tonic-gate 		break;
2757c478bd9Sstevel@tonic-gate 	default:
2767c478bd9Sstevel@tonic-gate 		(void) fprintf(stderr, gettext("date: bad conversion\n"));
2777c478bd9Sstevel@tonic-gate 		return (1);
2787c478bd9Sstevel@tonic-gate 	}
2797c478bd9Sstevel@tonic-gate 
2807c478bd9Sstevel@tonic-gate 	min = atoi(&date[minidx]);
2817c478bd9Sstevel@tonic-gate 	date[minidx] = '\0';
2827c478bd9Sstevel@tonic-gate 	hh = atoi(&date[minidx-2]);
2837c478bd9Sstevel@tonic-gate 	date[minidx-2] = '\0';
2847c478bd9Sstevel@tonic-gate 
2857c478bd9Sstevel@tonic-gate 	if (!dd) {
2867c478bd9Sstevel@tonic-gate 		/*
2877c478bd9Sstevel@tonic-gate 		 * if dd is 0 (not between 1 and 31), then
2887c478bd9Sstevel@tonic-gate 		 * read the value supplied by the user.
2897c478bd9Sstevel@tonic-gate 		 */
2907c478bd9Sstevel@tonic-gate 		dd = atoi(&date[2]);
2917c478bd9Sstevel@tonic-gate 		date[2] = '\0';
2927c478bd9Sstevel@tonic-gate 		mm = atoi(&date[0]);
2937c478bd9Sstevel@tonic-gate 	}
2947c478bd9Sstevel@tonic-gate 
2957c478bd9Sstevel@tonic-gate 	if (hh == 24)
2967c478bd9Sstevel@tonic-gate 		hh = 0, dd++;
2977c478bd9Sstevel@tonic-gate 
2987c478bd9Sstevel@tonic-gate 	/*  Validate date elements  */
2997c478bd9Sstevel@tonic-gate 	dd_check = 0;
3007c478bd9Sstevel@tonic-gate 	if (mm >= 1 && mm <= 12) {
3017c478bd9Sstevel@tonic-gate 		dd_check = month_size[mm - 1];	/* get days in this month */
3027c478bd9Sstevel@tonic-gate 		if (mm == 2 && isleap(yy))	/* adjust for leap year */
3037c478bd9Sstevel@tonic-gate 			dd_check++;
3047c478bd9Sstevel@tonic-gate 	}
3057c478bd9Sstevel@tonic-gate 	if (!((mm >= 1 && mm <= 12) && (dd >= 1 && dd <= dd_check) &&
30663ff6dceSGarrett D'Amore 	    (hh >= 0 && hh <= 23) && (min >= 0 && min <= 59))) {
3077c478bd9Sstevel@tonic-gate 		(void) fprintf(stderr, gettext("date: bad conversion\n"));
3087c478bd9Sstevel@tonic-gate 		return (1);
3097c478bd9Sstevel@tonic-gate 	}
3107c478bd9Sstevel@tonic-gate 
3117c478bd9Sstevel@tonic-gate 	/*  Build date and time number  */
3127c478bd9Sstevel@tonic-gate 	for (clock_val = 0, i = 1970; i < yy; i++)
3137c478bd9Sstevel@tonic-gate 		clock_val += year_size(i);
3147c478bd9Sstevel@tonic-gate 	/*  Adjust for leap year  */
3157c478bd9Sstevel@tonic-gate 	if (isleap(yy) && mm >= 3)
3167c478bd9Sstevel@tonic-gate 		clock_val += 1;
3177c478bd9Sstevel@tonic-gate 	/*  Adjust for different month lengths  */
3187c478bd9Sstevel@tonic-gate 	while (--mm)
3197c478bd9Sstevel@tonic-gate 		clock_val += (time_t)month_size[mm - 1];
3207c478bd9Sstevel@tonic-gate 	/*  Load up the rest  */
3217c478bd9Sstevel@tonic-gate 	clock_val += (time_t)(dd - 1);
3227c478bd9Sstevel@tonic-gate 	clock_val *= 24;
3237c478bd9Sstevel@tonic-gate 	clock_val += (time_t)hh;
3247c478bd9Sstevel@tonic-gate 	clock_val *= 60;
3257c478bd9Sstevel@tonic-gate 	clock_val += (time_t)min;
3267c478bd9Sstevel@tonic-gate 	clock_val *= 60;
3277c478bd9Sstevel@tonic-gate 	clock_val += sec;
3287c478bd9Sstevel@tonic-gate 
3297c478bd9Sstevel@tonic-gate 	if (!uflag) {
3307c478bd9Sstevel@tonic-gate 		/* convert to GMT assuming standard time */
3317c478bd9Sstevel@tonic-gate 		/* correction is made in localtime(3C) */
3327c478bd9Sstevel@tonic-gate 
3337c478bd9Sstevel@tonic-gate 		/*
3347c478bd9Sstevel@tonic-gate 		 * call localtime to set up "timezone" variable applicable
3357c478bd9Sstevel@tonic-gate 		 * for clock_val time, to support Olson timezones which
3367c478bd9Sstevel@tonic-gate 		 * can allow timezone rules to change.
3377c478bd9Sstevel@tonic-gate 		 */
3387c478bd9Sstevel@tonic-gate 		(void) localtime(&clock_val);
3397c478bd9Sstevel@tonic-gate 
3407c478bd9Sstevel@tonic-gate 		clock_val += (time_t)timezone;
3417c478bd9Sstevel@tonic-gate 
3427c478bd9Sstevel@tonic-gate 		/* correct if daylight savings time in effect */
3437c478bd9Sstevel@tonic-gate 
3447c478bd9Sstevel@tonic-gate 		if (localtime(&clock_val)->tm_isdst)
3457c478bd9Sstevel@tonic-gate 			clock_val = clock_val - (time_t)(timezone - altzone);
3467c478bd9Sstevel@tonic-gate 	}
3477c478bd9Sstevel@tonic-gate 
3487c478bd9Sstevel@tonic-gate 	(void) time(&wtmpx[0].ut_xtime);
3497c478bd9Sstevel@tonic-gate 	if (stime(&clock_val) < 0) {
3507c478bd9Sstevel@tonic-gate 		perror("date");
3517c478bd9Sstevel@tonic-gate 		return (1);
3527c478bd9Sstevel@tonic-gate 	}
3537c478bd9Sstevel@tonic-gate #if defined(i386)
3547c478bd9Sstevel@tonic-gate 	/* correct the kernel's "gmt_lag" and the PC's RTC */
3557c478bd9Sstevel@tonic-gate 	(void) system("/usr/sbin/rtc -c > /dev/null 2>&1");
3567c478bd9Sstevel@tonic-gate #endif
3577c478bd9Sstevel@tonic-gate 	(void) time(&wtmpx[1].ut_xtime);
3587c478bd9Sstevel@tonic-gate 	(void) pututxline(&wtmpx[0]);
3597c478bd9Sstevel@tonic-gate 	(void) pututxline(&wtmpx[1]);
3607c478bd9Sstevel@tonic-gate 	(void) updwtmpx(WTMPX_FILE, &wtmpx[0]);
3617c478bd9Sstevel@tonic-gate 	(void) updwtmpx(WTMPX_FILE, &wtmpx[1]);
3627c478bd9Sstevel@tonic-gate 	return (0);
3637c478bd9Sstevel@tonic-gate }
3647c478bd9Sstevel@tonic-gate 
3657c478bd9Sstevel@tonic-gate int
3667c478bd9Sstevel@tonic-gate get_adj(char *cp, struct timeval *tp)
3677c478bd9Sstevel@tonic-gate {
3687c478bd9Sstevel@tonic-gate 	register int mult;
3697c478bd9Sstevel@tonic-gate 	int sign;
3707c478bd9Sstevel@tonic-gate 
3717c478bd9Sstevel@tonic-gate 	/* arg must be [-]sss[.fff] */
3727c478bd9Sstevel@tonic-gate 
3737c478bd9Sstevel@tonic-gate 	tp->tv_sec = tp->tv_usec = 0;
3747c478bd9Sstevel@tonic-gate 	if (*cp == '-') {
3757c478bd9Sstevel@tonic-gate 		sign = -1;
3767c478bd9Sstevel@tonic-gate 		cp++;
3777c478bd9Sstevel@tonic-gate 	} else {
3787c478bd9Sstevel@tonic-gate 		sign = 1;
3797c478bd9Sstevel@tonic-gate 	}
3807c478bd9Sstevel@tonic-gate 
3817c478bd9Sstevel@tonic-gate 	while (*cp >= '0' && *cp <= '9') {
3827c478bd9Sstevel@tonic-gate 		tp->tv_sec *= 10;
3837c478bd9Sstevel@tonic-gate 		tp->tv_sec += *cp++ - '0';
3847c478bd9Sstevel@tonic-gate 	}
3857c478bd9Sstevel@tonic-gate 	if (*cp == '.') {
3867c478bd9Sstevel@tonic-gate 		cp++;
3877c478bd9Sstevel@tonic-gate 		mult = 100000;
3887c478bd9Sstevel@tonic-gate 		while (*cp >= '0' && *cp <= '9') {
3897c478bd9Sstevel@tonic-gate 			tp->tv_usec += (*cp++ - '0') * mult;
3907c478bd9Sstevel@tonic-gate 			mult /= 10;
3917c478bd9Sstevel@tonic-gate 		}
3927c478bd9Sstevel@tonic-gate 	}
3937c478bd9Sstevel@tonic-gate 	/*
3947c478bd9Sstevel@tonic-gate 	 * if there's anything left in the string,
3957c478bd9Sstevel@tonic-gate 	 * the input was invalid.
3967c478bd9Sstevel@tonic-gate 	 */
3977c478bd9Sstevel@tonic-gate 	if (*cp) {
3987c478bd9Sstevel@tonic-gate 		return (-1);
3997c478bd9Sstevel@tonic-gate 	} else {
4007c478bd9Sstevel@tonic-gate 		tp->tv_sec *= sign;
4017c478bd9Sstevel@tonic-gate 		tp->tv_usec *= sign;
4027c478bd9Sstevel@tonic-gate 		return (0);
4037c478bd9Sstevel@tonic-gate 	}
4047c478bd9Sstevel@tonic-gate }
40572fb660eSKeith M Wesolowski 
40672fb660eSKeith M Wesolowski /*
40772fb660eSKeith M Wesolowski  * Extensions that cannot be interpreted by strftime are interpreted here.
40872fb660eSKeith M Wesolowski  */
40972fb660eSKeith M Wesolowski void
41072fb660eSKeith M Wesolowski fmt_extensions(char *fmtbuf, size_t len,
41172fb660eSKeith M Wesolowski     const char *fmt, const struct timespec *tsp)
41272fb660eSKeith M Wesolowski {
41372fb660eSKeith M Wesolowski 	const char *p;
41472fb660eSKeith M Wesolowski 	char *q;
41572fb660eSKeith M Wesolowski 
41672fb660eSKeith M Wesolowski 	for (p = fmt, q = fmtbuf; *p != '\0' && q < fmtbuf + len; ++p) {
41772fb660eSKeith M Wesolowski 		if (*p == '%') {
41872fb660eSKeith M Wesolowski 			switch (*(p + 1)) {
41972fb660eSKeith M Wesolowski 			case 'N':
42072fb660eSKeith M Wesolowski 				++p;
42172fb660eSKeith M Wesolowski 				q += snprintf(q, len - (q - fmtbuf),
42272fb660eSKeith M Wesolowski 				    "%09lu", tsp->tv_nsec);
42372fb660eSKeith M Wesolowski 				continue;
42472fb660eSKeith M Wesolowski 			}
42572fb660eSKeith M Wesolowski 		}
42672fb660eSKeith M Wesolowski 		*q++ = *p;
42772fb660eSKeith M Wesolowski 	}
42872fb660eSKeith M Wesolowski 
42972fb660eSKeith M Wesolowski 	if (q < fmtbuf + len)
43072fb660eSKeith M Wesolowski 		*q = '\0';
43172fb660eSKeith M Wesolowski 	else
43272fb660eSKeith M Wesolowski 		fmtbuf[len - 1] = '\0';
43372fb660eSKeith M Wesolowski }
434