freebsd-skq/usr.bin/calendar/day.c
cem 76ec5ed273 Add extremely useful calendar(1) application to FreeBSD
It does extremely useful things like execute sendmail and spew dubiously
accurate factoids.

From the feedback, it seems like it is an essential utility in a modern unix
and not at all a useless bikeshed.  How do those Linux people live without it?
Reverts r358561.
2020-03-03 00:20:08 +00:00

110 lines
3.0 KiB
C

/*-
* SPDX-License-Identifier: BSD-3-Clause
*
* 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.
* 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <err.h>
#include <locale.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include "calendar.h"
static time_t time1, time2;
const struct tm tm0;
char dayname[100];
int year1, year2;
void
settimes(time_t now, int before, int after, int friday, struct tm *tp1, struct tm *tp2)
{
struct tm tp;
localtime_r(&now, &tp);
/* Friday displays Monday's events */
if (after == 0 && before == 0 && friday != -1)
after = tp.tm_wday == friday ? 3 : 1;
time1 = now - SECSPERDAY * before;
localtime_r(&time1, tp1);
year1 = 1900 + tp1->tm_year;
time2 = now + SECSPERDAY * after;
localtime_r(&time2, tp2);
year2 = 1900 + tp2->tm_year;
strftime(dayname, sizeof(dayname) - 1, "%A, %d %B %Y", tp1);
setnnames();
}
/* convert Day[/Month][/Year] into unix time (since 1970)
* Day: two digits, Month: two digits, Year: digits
*/
time_t
Mktime(char *dp)
{
time_t t;
int d, m, y;
struct tm tm, tp;
(void)time(&t);
localtime_r(&t, &tp);
tm = tm0;
tm.tm_mday = tp.tm_mday;
tm.tm_mon = tp.tm_mon;
tm.tm_year = tp.tm_year;
switch (sscanf(dp, "%d.%d.%d", &d, &m, &y)) {
case 3:
if (y > 1900)
y -= 1900;
tm.tm_year = y;
/* FALLTHROUGH */
case 2:
tm.tm_mon = m - 1;
/* FALLTHROUGH */
case 1:
tm.tm_mday = d;
}
#ifdef DEBUG
fprintf(stderr, "Mktime: %d %d %s\n",
(int)mktime(&tm), (int)t, asctime(&tm));
#endif
return (mktime(&tm));
}