NetBSD/bin/date/date.c

233 lines
5.5 KiB
C
Raw Normal View History

1998-01-21 03:07:44 +03:00
/* $NetBSD: date.c,v 1.21 1998/01/21 00:07:44 mycroft Exp $ */
1995-03-21 12:01:59 +03:00
1993-03-21 12:45:37 +03:00
/*
1994-09-22 13:24:46 +04:00
* Copyright (c) 1985, 1987, 1988, 1993
* The Regents of the University of California. All rights reserved.
1993-03-21 12:45:37 +03:00
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
1993-03-21 12:45:37 +03:00
#ifndef lint
__COPYRIGHT(
1994-09-22 13:24:46 +04:00
"@(#) Copyright (c) 1985, 1987, 1988, 1993\n\
The Regents of the University of California. All rights reserved.\n");
1993-03-21 12:45:37 +03:00
#endif /* not lint */
#ifndef lint
1995-04-23 14:07:18 +04:00
#if 0
1995-09-07 10:12:53 +04:00
static char sccsid[] = "@(#)date.c 8.2 (Berkeley) 4/28/95";
1995-04-23 14:07:18 +04:00
#else
1998-01-21 03:07:44 +03:00
__RCSID("$NetBSD: date.c,v 1.21 1998/01/21 00:07:44 mycroft Exp $");
1995-04-23 14:07:18 +04:00
#endif
1993-03-21 12:45:37 +03:00
#endif /* not lint */
#include <sys/param.h>
#include <sys/time.h>
1994-09-22 13:24:46 +04:00
#include <ctype.h>
#include <err.h>
#include <fcntl.h>
1993-03-21 12:45:37 +03:00
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
1993-12-31 22:25:23 +03:00
#include <locale.h>
1994-09-22 13:24:46 +04:00
#include <syslog.h>
#include <tzfile.h>
1994-09-22 13:24:46 +04:00
#include <unistd.h>
#include <util.h>
1994-09-22 13:24:46 +04:00
#include "extern.h"
1993-03-21 12:45:37 +03:00
time_t tval;
int retval, nflag;
int main __P((int, char *[]));
1994-09-22 13:24:46 +04:00
static void setthetime __P((char *));
static void badformat __P((void));
static void usage __P((void));
int
1993-03-21 12:45:37 +03:00
main(argc, argv)
int argc;
char *argv[];
1993-03-21 12:45:37 +03:00
{
extern int optind;
extern char *optarg;
int ch, rflag;
char *format, buf[1024];
1997-11-06 00:17:14 +03:00
(void)setlocale(LC_ALL, "");
1993-12-31 22:25:23 +03:00
1993-03-21 12:45:37 +03:00
rflag = 0;
while ((ch = getopt(argc, argv, "nr:u")) != -1)
1993-03-21 12:45:37 +03:00
switch((char)ch) {
case 'n': /* don't set network */
nflag = 1;
break;
case 'r': /* user specified seconds */
rflag = 1;
tval = atol(optarg);
break;
case 'u': /* do everything in GMT */
(void)setenv("TZ", "GMT0", 1);
break;
default:
usage();
}
argc -= optind;
argv += optind;
1994-09-22 13:24:46 +04:00
if (!rflag && time(&tval) == -1)
err(1, "time");
1993-03-21 12:45:37 +03:00
format = "%a %b %e %H:%M:%S %Z %Y";
1993-03-21 12:45:37 +03:00
/* allow the operands in any order */
if (*argv && **argv == '+') {
format = *argv + 1;
++argv;
}
if (*argv) {
setthetime(*argv);
++argv;
}
if (*argv && **argv == '+')
format = *argv + 1;
(void)strftime(buf, sizeof(buf), format, localtime(&tval));
(void)printf("%s\n", buf);
1993-03-21 12:45:37 +03:00
exit(retval);
1997-11-06 00:17:14 +03:00
/* NOTREACHED */
1993-03-21 12:45:37 +03:00
}
1998-01-21 03:07:44 +03:00
#define ATOI2(s) ((s) += 2, ((s)[-2] - '0') * 10 + ((s)[-1] - '0'))
1994-09-22 13:24:46 +04:00
void
1993-03-21 12:45:37 +03:00
setthetime(p)
1997-01-09 19:31:05 +03:00
char *p;
1993-03-21 12:45:37 +03:00
{
1997-01-09 19:31:05 +03:00
struct tm *lt;
1993-03-21 12:45:37 +03:00
struct timeval tv;
1994-09-22 13:24:46 +04:00
char *dot, *t;
int yearset;
1994-09-22 13:24:46 +04:00
for (t = p, dot = NULL; *t; ++t) {
if (isdigit(*t))
continue;
if (*t == '.' && dot == NULL) {
dot = t;
continue;
}
badformat();
}
1993-03-21 12:45:37 +03:00
lt = localtime(&tval);
1994-09-22 13:24:46 +04:00
if (dot != NULL) { /* .ss */
*dot++ = '\0';
if (strlen(dot) != 2)
badformat();
lt->tm_sec = ATOI2(dot);
1993-03-21 12:45:37 +03:00
} else
lt->tm_sec = 0;
yearset = 0;
1993-03-21 12:45:37 +03:00
switch (strlen(p)) {
1998-01-21 03:07:44 +03:00
case 12: /* cc */
lt->tm_year = ATOI2(p) * 100 - TM_YEAR_BASE;
yearset = 1;
/* FALLTHROUGH */
case 10: /* yy */
if (yearset) {
1998-01-21 03:07:44 +03:00
lt->tm_year += ATOI2(p);
} else {
yearset = ATOI2(p);
1998-01-21 03:07:44 +03:00
if (yearset < 69)
lt->tm_year = yearset + 2000 - TM_YEAR_BASE;
else
1998-01-21 03:07:44 +03:00
lt->tm_year = yearset + 1900 - TM_YEAR_BASE;
}
1993-03-21 12:45:37 +03:00
/* FALLTHROUGH */
case 8: /* mm */
lt->tm_mon = ATOI2(p);
--lt->tm_mon; /* time struct is 0 - 11 */
/* FALLTHROUGH */
case 6: /* dd */
lt->tm_mday = ATOI2(p);
/* FALLTHROUGH */
case 4: /* hh */
lt->tm_hour = ATOI2(p);
/* FALLTHROUGH */
case 2: /* mm */
lt->tm_min = ATOI2(p);
break;
default:
badformat();
}
/* convert broken-down time to GMT clock time */
if ((tval = mktime(lt)) == -1)
badformat();
/* set the time */
if (nflag || netsettime(tval)) {
logwtmp("|", "date", "");
tv.tv_sec = tval;
tv.tv_usec = 0;
1994-09-22 13:24:46 +04:00
if (settimeofday(&tv, NULL)) {
1993-03-21 12:45:37 +03:00
perror("date: settimeofday");
exit(1);
}
logwtmp("{", "date", "");
}
1994-09-22 13:24:46 +04:00
if ((p = getlogin()) == NULL)
p = "???";
syslog(LOG_AUTH | LOG_NOTICE, "date set by %s", p);
1993-03-21 12:45:37 +03:00
}
1994-09-22 13:24:46 +04:00
static void
1993-03-21 12:45:37 +03:00
badformat()
{
1994-09-22 13:24:46 +04:00
warnx("illegal time format");
1993-03-21 12:45:37 +03:00
usage();
}
1994-09-22 13:24:46 +04:00
static void
1993-03-21 12:45:37 +03:00
usage()
{
(void)fprintf(stderr,
"usage: date [-nu] [-r seconds] [+format]\n");
(void)fprintf(stderr, " date [[[[[cc]yy]mm]dd]hh]mm[.ss]\n");
1993-03-21 12:45:37 +03:00
exit(1);
}