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/*-
* Copyright (c) 1989, 1993, 1994
* 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.
* 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.
*/
#ifndef lint
static const char copyright[] =
"@(#) Copyright (c) 1989, 1993\n\
The Regents of the University of California. All rights reserved.\n";
#endif
#if 0
#ifndef lint
static char sccsid[] = "@(#)calendar.c 8.3 (Berkeley) 3/25/94";
#endif
#endif
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <err.h>
#include <errno.h>
#include <locale.h>
#include <pwd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include "calendar.h"
#define UTCOFFSET_NOTSET 100 /* Expected between -24 and +24 */
#define LONGITUDE_NOTSET 1000 /* Expected between -360 and +360 */
struct passwd *pw;
int doall = 0;
int debug = 0;
static char *DEBUG = NULL;
static time_t f_time = 0;
double UTCOffset = UTCOFFSET_NOTSET;
int EastLongitude = LONGITUDE_NOTSET;
static void usage(void) __dead2;
int
main(int argc, char *argv[])
{
int f_dayAfter = 0; /* days after current date */
int f_dayBefore = 0; /* days before current date */
int Friday = 5; /* day before weekend */
int ch;
struct tm tp1, tp2;
(void)setlocale(LC_ALL, "");
while ((ch = getopt(argc, argv, "-A:aB:D:dF:f:l:t:U:W:?")) != -1)
switch (ch) {
case '-': /* backward contemptible */
case 'a':
if (getuid()) {
errno = EPERM;
err(1, NULL);
}
doall = 1;
break;
case 'W': /* we don't need no steenking Fridays */
Friday = -1;
/* FALLTHROUGH */
case 'A': /* days after current date */
f_dayAfter = atoi(optarg);
if (f_dayAfter < 0)
errx(1, "number of days must be positive");
break;
case 'B': /* days before current date */
f_dayBefore = atoi(optarg);
if (f_dayBefore < 0)
errx(1, "number of days must be positive");
break;
case 'D': /* debug output of sun and moon info */
DEBUG = optarg;
break;
case 'd': /* debug output of current date */
debug = 1;
break;
case 'F': /* Change the time: When does weekend start? */
Friday = atoi(optarg);
break;
case 'f': /* other calendar file */
calendarFile = optarg;
break;
case 'l': /* Change longitudal position */
EastLongitude = strtol(optarg, NULL, 10);
break;
case 't': /* other date, for tests */
f_time = Mktime(optarg);
break;
case 'U': /* Change UTC offset */
UTCOffset = strtod(optarg, NULL);
break;
case '?':
default:
usage();
}
argc -= optind;
argv += optind;
if (argc)
usage();
/* use current time */
if (f_time <= 0)
(void)time(&f_time);
/* if not set, determine where I could be */
{
if (UTCOffset == UTCOFFSET_NOTSET &&
EastLongitude == LONGITUDE_NOTSET) {
/* Calculate on difference between here and UTC */
time_t t;
struct tm tm;
long utcoffset, hh, mm, ss;
double uo;
time(&t);
localtime_r(&t, &tm);
utcoffset = tm.tm_gmtoff;
/* seconds -> hh:mm:ss */
hh = utcoffset / SECSPERHOUR;
utcoffset %= SECSPERHOUR;
mm = utcoffset / SECSPERMINUTE;
utcoffset %= SECSPERMINUTE;
ss = utcoffset;
/* hh:mm:ss -> hh.mmss */
uo = mm + (100.0 * (ss / 60.0));
uo /= 60.0 / 100.0;
uo = hh + uo / 100;
UTCOffset = uo;
EastLongitude = UTCOffset * 15;
} else if (UTCOffset == UTCOFFSET_NOTSET) {
/* Base on information given */
UTCOffset = EastLongitude / 15;
} else if (EastLongitude == LONGITUDE_NOTSET) {
/* Base on information given */
EastLongitude = UTCOffset * 15;
}
}
settimes(f_time, f_dayBefore, f_dayAfter, Friday, &tp1, &tp2);
generatedates(&tp1, &tp2);
/*
* FROM now on, we are working in UTC.
* This will only affect moon and sun related events anyway.
*/
if (setenv("TZ", "UTC", 1) != 0)
errx(1, "setenv: %s", strerror(errno));
tzset();
if (debug)
dumpdates();
if (DEBUG != NULL) {
dodebug(DEBUG);
exit(0);
}
if (doall)
while ((pw = getpwent()) != NULL) {
(void)setegid(pw->pw_gid);
(void)initgroups(pw->pw_name, pw->pw_gid);
(void)seteuid(pw->pw_uid);
if (!chdir(pw->pw_dir))
cal();
(void)seteuid(0);
}
else
cal();
exit(0);
}
static void __dead2
usage(void)
{
fprintf(stderr, "%s\n%s\n%s\n",
"usage: calendar [-A days] [-a] [-B days] [-D sun|moon] [-d]",
" [-F friday] [-f calendarfile] [-l longitude]",
" [-t dd[.mm[.year]]] [-U utcoffset] [-W days]"
);
exit(1);
}
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