270 lines
6.8 KiB
C
270 lines
6.8 KiB
C
/* $OpenBSD: date.c,v 1.52 2018/02/13 17:28:11 cheloha Exp $ */
|
|
/* $NetBSD: date.c,v 1.11 1995/09/07 06:21:05 jtc Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 1985, 1987, 1988, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* 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. 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.
|
|
*/
|
|
|
|
#define _DEFAULT_SOURCE
|
|
|
|
#include <sys/time.h>
|
|
#include <sys/types.h>
|
|
|
|
#include <ctype.h>
|
|
#include <err.h>
|
|
#include <fcntl.h>
|
|
#include <libgen.h>
|
|
#include <limits.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <syslog.h>
|
|
#include <time.h>
|
|
#include <unistd.h>
|
|
|
|
static const char *__progname;
|
|
|
|
time_t tval;
|
|
int jflag;
|
|
int slidetime;
|
|
|
|
static void setthetime(char *);
|
|
static void badformat(void);
|
|
static void usage(void);
|
|
|
|
int main(int argc, char *argv[]) {
|
|
struct timezone tz;
|
|
struct tm *tp;
|
|
int ch, rflag;
|
|
char *format, buf[1024], *outzone = NULL;
|
|
__progname = basename(argv[0]);
|
|
|
|
tz.tz_dsttime = tz.tz_minuteswest = 0;
|
|
rflag = 0;
|
|
while ((ch = getopt(argc, argv, "ad:jr:ut:z:")) != -1)
|
|
switch (ch) {
|
|
case 'd': /* daylight saving time */
|
|
tz.tz_dsttime = atoi(optarg) ? 1 : 0;
|
|
break;
|
|
case 'a':
|
|
slidetime = 1;
|
|
break;
|
|
case 'j': /* don't set */
|
|
jflag = 1;
|
|
break;
|
|
case 'r': /* user specified seconds */
|
|
rflag = 1;
|
|
if ((tval = (long long)strtol(optarg, NULL, 10)) !=0)
|
|
errx(1, "seconds out of range");
|
|
break;
|
|
case 'u': /* do everything in UTC */
|
|
if (setenv("TZ", "UTC", 1) == -1)
|
|
err(1, "cannot unsetenv TZ");
|
|
break;
|
|
case 't': /* minutes west of GMT */
|
|
tz.tz_minuteswest = (long long)strtol(optarg, NULL, 10);
|
|
if (tz.tz_minuteswest < 0 || tz.tz_minuteswest > 24 * 60 -1)
|
|
errx(1, "minutes out of range");
|
|
break;
|
|
case 'z':
|
|
outzone = optarg;
|
|
break;
|
|
default:
|
|
usage();
|
|
}
|
|
argc -= optind;
|
|
argv += optind;
|
|
|
|
/*
|
|
* If -d or -t, set the timezone or daylight saving time; this
|
|
* doesn't belong here, the kernel should not know about either.
|
|
*/
|
|
if ((tz.tz_minuteswest || tz.tz_dsttime) && settimeofday(NULL, &tz))
|
|
err(1, "settimeofday");
|
|
|
|
if (!rflag && time(&tval) == -1)
|
|
err(1, "time");
|
|
|
|
format = "%a %b %e %H:%M:%S %Z %Y";
|
|
|
|
/* allow the operands in any order */
|
|
if (*argv && **argv == '+') {
|
|
format = *argv + 1;
|
|
argv++;
|
|
argc--;
|
|
}
|
|
|
|
if (*argv) {
|
|
setthetime(*argv);
|
|
argv++;
|
|
argc--;
|
|
}
|
|
|
|
/* if (pledge("stdio rpath wpath", NULL) == -1)
|
|
err(1, "pledge"); */
|
|
|
|
if (*argv && **argv == '+') {
|
|
format = *argv + 1;
|
|
argc--;
|
|
}
|
|
|
|
if (argc > 0)
|
|
errx(1, "too many arguments");
|
|
|
|
if (outzone)
|
|
setenv("TZ", outzone, 1);
|
|
|
|
tp = localtime(&tval);
|
|
if (tp == NULL)
|
|
errx(1, "conversion error");
|
|
(void)strftime(buf, sizeof(buf), format, tp);
|
|
(void)printf("%s\n", buf);
|
|
return 0;
|
|
}
|
|
|
|
#define ATOI2(ar) ((ar) += 2, ((ar)[-2] - '0') * 10 + ((ar)[-1] - '0'))
|
|
void setthetime(char *p) {
|
|
struct tm *lt;
|
|
struct timeval tv;
|
|
char *dot, *t;
|
|
time_t now;
|
|
int yearset = 0;
|
|
|
|
for (t = p, dot = NULL; *t; ++t) {
|
|
if (isdigit((unsigned char)*t))
|
|
continue;
|
|
if (*t == '.' && dot == NULL) {
|
|
dot = t;
|
|
continue;
|
|
}
|
|
badformat();
|
|
}
|
|
|
|
lt = localtime(&tval);
|
|
|
|
lt->tm_isdst = -1; /* correct for DST */
|
|
|
|
if (dot != NULL) { /* .SS */
|
|
*dot++ = '\0';
|
|
if (strlen(dot) != 2)
|
|
badformat();
|
|
lt->tm_sec = ATOI2(dot);
|
|
if (lt->tm_sec > 61)
|
|
badformat();
|
|
} else
|
|
lt->tm_sec = 0;
|
|
|
|
switch (strlen(p)) {
|
|
case 12: /* cc */
|
|
lt->tm_year = (ATOI2(p) * 100) - 1900;
|
|
yearset = 1;
|
|
/* FALLTHROUGH */
|
|
case 10: /* yy */
|
|
if (!yearset) {
|
|
/* mask out current year, leaving only century */
|
|
lt->tm_year = ((lt->tm_year / 100) * 100);
|
|
}
|
|
lt->tm_year += ATOI2(p);
|
|
/* FALLTHROUGH */
|
|
case 8: /* mm */
|
|
lt->tm_mon = ATOI2(p);
|
|
if ((lt->tm_mon > 12) || !lt->tm_mon)
|
|
badformat();
|
|
--lt->tm_mon; /* time struct is 0 - 11 */
|
|
/* FALLTHROUGH */
|
|
case 6: /* dd */
|
|
lt->tm_mday = ATOI2(p);
|
|
if ((lt->tm_mday > 31) || !lt->tm_mday)
|
|
badformat();
|
|
/* FALLTHROUGH */
|
|
case 4: /* HH */
|
|
lt->tm_hour = ATOI2(p);
|
|
if (lt->tm_hour > 23)
|
|
badformat();
|
|
/* FALLTHROUGH */
|
|
case 2: /* MM */
|
|
lt->tm_min = ATOI2(p);
|
|
if (lt->tm_min > 59)
|
|
badformat();
|
|
break;
|
|
default:
|
|
badformat();
|
|
}
|
|
|
|
/* convert broken-down time to UTC clock time */
|
|
if ((tval = mktime(lt)) < 0)
|
|
errx(1, "specified date is outside allowed range");
|
|
|
|
if (jflag)
|
|
return;
|
|
|
|
/* set the time */
|
|
if (slidetime) {
|
|
if ((now = time(NULL)) == -1)
|
|
err(1, "time");
|
|
tv.tv_sec = tval - now;
|
|
tv.tv_usec = 0;
|
|
if (adjtime(&tv, NULL) == -1)
|
|
err(1, "adjtime");
|
|
} else {
|
|
#ifdef HAVE_WTMP
|
|
#ifndef SMALL
|
|
logwtmp("|", "date", "");
|
|
#endif
|
|
#endif
|
|
tv.tv_sec = tval;
|
|
tv.tv_usec = 0;
|
|
if (settimeofday(&tv, NULL))
|
|
err(1, "settimeofday");
|
|
#if HAVE_WTMP
|
|
#ifndef SMALL
|
|
logwtmp("{", "date", "");
|
|
#endif
|
|
#endif
|
|
}
|
|
|
|
if ((p = getlogin()) == NULL)
|
|
p = "???";
|
|
syslog(LOG_AUTH | LOG_NOTICE, "date set by %s", p);
|
|
}
|
|
|
|
static void badformat(void) {
|
|
warnx("illegal time format");
|
|
usage();
|
|
}
|
|
|
|
static void usage(void) {
|
|
(void)fprintf(stderr,
|
|
"usage: %s [-aju] [-d dst] [-r seconds] [-t minutes_west] [-z "
|
|
"output_zone]\n",
|
|
__progname);
|
|
(void)fprintf(stderr, "%-*s[+format] [[[[[[cc]yy]mm]dd]HH]MM[.SS]]\n",
|
|
(int)strlen(__progname) + 8, "");
|
|
exit(1);
|
|
}
|