fd1efedc79
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.
259 lines
6.3 KiB
C
259 lines
6.3 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 1989, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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static const char copyright[] =
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"@(#) Copyright (c) 1989, 1993\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif
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#if 0
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#ifndef lint
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static char sccsid[] = "@(#)calendar.c 8.3 (Berkeley) 3/25/94";
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#endif
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#endif
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/types.h>
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#include <err.h>
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#include <errno.h>
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#include <locale.h>
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#include <login_cap.h>
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#include <langinfo.h>
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#include <pwd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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#include <unistd.h>
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#include "calendar.h"
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#define UTCOFFSET_NOTSET 100 /* Expected between -24 and +24 */
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#define LONGITUDE_NOTSET 1000 /* Expected between -360 and +360 */
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struct passwd *pw;
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int doall = 0;
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int debug = 0;
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static char *DEBUG = NULL;
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static time_t f_time = 0;
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double UTCOffset = UTCOFFSET_NOTSET;
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int EastLongitude = LONGITUDE_NOTSET;
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#ifdef WITH_ICONV
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const char *outputEncoding = NULL;
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#endif
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static void usage(void) __dead2;
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int
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main(int argc, char *argv[])
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{
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int f_dayAfter = 0; /* days after current date */
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int f_dayBefore = 0; /* days before current date */
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int Friday = 5; /* day before weekend */
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int ch;
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struct tm tp1, tp2;
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(void)setlocale(LC_ALL, "");
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while ((ch = getopt(argc, argv, "-A:aB:D:dF:f:l:t:U:W:?")) != -1)
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switch (ch) {
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case '-': /* backward contemptible */
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case 'a':
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if (getuid()) {
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errno = EPERM;
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err(1, NULL);
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}
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doall = 1;
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break;
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case 'W': /* we don't need no steenking Fridays */
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Friday = -1;
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/* FALLTHROUGH */
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case 'A': /* days after current date */
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f_dayAfter = atoi(optarg);
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if (f_dayAfter < 0)
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errx(1, "number of days must be positive");
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break;
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case 'B': /* days before current date */
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f_dayBefore = atoi(optarg);
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if (f_dayBefore < 0)
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errx(1, "number of days must be positive");
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break;
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case 'D': /* debug output of sun and moon info */
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DEBUG = optarg;
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break;
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case 'd': /* debug output of current date */
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debug = 1;
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break;
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case 'F': /* Change the time: When does weekend start? */
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Friday = atoi(optarg);
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break;
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case 'f': /* other calendar file */
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calendarFile = optarg;
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break;
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case 'l': /* Change longitudal position */
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EastLongitude = strtol(optarg, NULL, 10);
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break;
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case 't': /* other date, for tests */
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f_time = Mktime(optarg);
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break;
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case 'U': /* Change UTC offset */
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UTCOffset = strtod(optarg, NULL);
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break;
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case '?':
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default:
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usage();
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}
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argc -= optind;
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argv += optind;
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if (argc)
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usage();
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/* use current time */
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if (f_time <= 0)
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(void)time(&f_time);
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/* if not set, determine where I could be */
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{
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if (UTCOffset == UTCOFFSET_NOTSET &&
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EastLongitude == LONGITUDE_NOTSET) {
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/* Calculate on difference between here and UTC */
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time_t t;
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struct tm tm;
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long utcoffset, hh, mm, ss;
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double uo;
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time(&t);
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localtime_r(&t, &tm);
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utcoffset = tm.tm_gmtoff;
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/* seconds -> hh:mm:ss */
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hh = utcoffset / SECSPERHOUR;
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utcoffset %= SECSPERHOUR;
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mm = utcoffset / SECSPERMINUTE;
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utcoffset %= SECSPERMINUTE;
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ss = utcoffset;
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/* hh:mm:ss -> hh.mmss */
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uo = mm + (100.0 * (ss / 60.0));
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uo /= 60.0 / 100.0;
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uo = hh + uo / 100;
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UTCOffset = uo;
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EastLongitude = UTCOffset * 15;
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} else if (UTCOffset == UTCOFFSET_NOTSET) {
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/* Base on information given */
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UTCOffset = EastLongitude / 15;
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} else if (EastLongitude == LONGITUDE_NOTSET) {
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/* Base on information given */
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EastLongitude = UTCOffset * 15;
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}
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}
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settimes(f_time, f_dayBefore, f_dayAfter, Friday, &tp1, &tp2);
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generatedates(&tp1, &tp2);
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/*
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* FROM now on, we are working in UTC.
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* This will only affect moon and sun related events anyway.
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*/
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if (setenv("TZ", "UTC", 1) != 0)
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errx(1, "setenv: %s", strerror(errno));
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tzset();
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if (debug)
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dumpdates();
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if (DEBUG != NULL) {
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dodebug(DEBUG);
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exit(0);
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}
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if (doall)
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while ((pw = getpwent()) != NULL) {
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pid_t pid;
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if (chdir(pw->pw_dir) == -1)
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continue;
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pid = fork();
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if (pid < 0)
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err(1, "fork");
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if (pid == 0) {
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login_cap_t *lc;
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lc = login_getpwclass(pw);
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if (setusercontext(lc, pw, pw->pw_uid,
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LOGIN_SETALL) != 0)
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errx(1, "setusercontext");
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cal();
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exit(0);
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}
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}
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else {
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#ifdef WITH_ICONV
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/* Save the information about the encoding used in the terminal. */
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outputEncoding = strdup(nl_langinfo(CODESET));
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if (outputEncoding == NULL)
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errx(1, "cannot allocate memory");
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#endif
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cal();
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}
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exit(0);
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}
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static void __dead2
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usage(void)
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{
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fprintf(stderr, "%s\n%s\n%s\n",
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"usage: calendar [-A days] [-a] [-B days] [-D sun|moon] [-d]",
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" [-F friday] [-f calendarfile] [-l longitude]",
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" [-t dd[.mm[.year]]] [-U utcoffset] [-W days]"
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);
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exit(1);
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}
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