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197 lines
5.1 KiB
C
197 lines
5.1 KiB
C
/*
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* Copyright (c) 1980, 1988, 1993
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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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. 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) 1980, 1988, 1993\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif /* not lint */
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)leave.c 8.1 (Berkeley) 6/6/93";
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#endif
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#endif /* not lint */
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <err.h>
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#include <ctype.h>
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#include <locale.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <time.h>
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#include <unistd.h>
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static void doalarm(u_int);
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static void usage(void);
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/*
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* leave [[+]hhmm]
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*
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* Reminds you when you have to leave.
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* Leave prompts for input and goes away if you hit return.
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* It nags you like a mother hen.
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*/
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int
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main(int argc, char **argv)
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{
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u_int secs;
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int hours, minutes;
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char c, *cp = NULL;
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struct tm *t;
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time_t now;
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int plusnow, t_12_hour;
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char buf[50];
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if (setlocale(LC_TIME, "") == NULL)
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warn("setlocale");
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if (argc < 2) {
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#define MSG1 "When do you have to leave? "
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(void)write(STDOUT_FILENO, MSG1, sizeof(MSG1) - 1);
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cp = fgets(buf, sizeof(buf), stdin);
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if (cp == NULL || *cp == '\n')
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exit(0);
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} else if (argc > 2)
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usage();
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else
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cp = argv[1];
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if (*cp == '+') {
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plusnow = 1;
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++cp;
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} else
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plusnow = 0;
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for (hours = 0; (c = *cp) && c != '\n'; ++cp) {
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if (!isdigit(c))
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usage();
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hours = hours * 10 + (c - '0');
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}
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minutes = hours % 100;
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hours /= 100;
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if (minutes < 0 || minutes > 59)
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usage();
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if (plusnow)
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secs = hours * 60 * 60 + minutes * 60;
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else {
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(void)time(&now);
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t = localtime(&now);
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if (hours > 23)
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usage();
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/* Convert tol to 12 hr time (0:00...11:59) */
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if (hours > 11)
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hours -= 12;
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/* Convert tm to 12 hr time (0:00...11:59) */
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if (t->tm_hour > 11)
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t_12_hour = t->tm_hour - 12;
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else
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t_12_hour = t->tm_hour;
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if (hours < t_12_hour ||
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(hours == t_12_hour && minutes <= t->tm_min))
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/* Leave time is in the past so we add 12 hrs */
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hours += 12;
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secs = (hours - t_12_hour) * 60 * 60;
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secs += (minutes - t->tm_min) * 60;
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secs -= now % 60; /* truncate (now + secs) to min */
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}
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doalarm(secs);
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exit(0);
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}
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void
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doalarm(u_int secs)
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{
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int bother;
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time_t daytime;
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char tb[80];
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int pid;
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if ((pid = fork())) {
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(void)time(&daytime);
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daytime += secs;
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strftime(tb, sizeof(tb), "%+", localtime(&daytime));
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printf("Alarm set for %s. (pid %d)\n", tb, pid);
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exit(0);
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}
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sleep((u_int)2); /* let parent print set message */
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if (secs >= 2)
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secs -= 2;
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/*
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* if write fails, we've lost the terminal through someone else
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* causing a vhangup by logging in.
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*/
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#define FIVEMIN (5 * 60)
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#define MSG2 "\07\07You have to leave in 5 minutes.\n"
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if (secs >= FIVEMIN) {
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sleep(secs - FIVEMIN);
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if (write(STDOUT_FILENO, MSG2, sizeof(MSG2) - 1) != sizeof(MSG2) - 1)
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exit(0);
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secs = FIVEMIN;
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}
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#define ONEMIN (60)
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#define MSG3 "\07\07Just one more minute!\n"
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if (secs >= ONEMIN) {
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sleep(secs - ONEMIN);
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if (write(STDOUT_FILENO, MSG3, sizeof(MSG3) - 1) != sizeof(MSG3) - 1)
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exit(0);
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}
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#define MSG4 "\07\07Time to leave!\n"
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for (bother = 10; bother--;) {
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sleep((u_int)ONEMIN);
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if (write(STDOUT_FILENO, MSG4, sizeof(MSG4) - 1) != sizeof(MSG4) - 1)
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exit(0);
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}
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#define MSG5 "\07\07That was the last time I'll tell you. Bye.\n"
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(void)write(STDOUT_FILENO, MSG5, sizeof(MSG5) - 1);
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exit(0);
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}
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static void
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usage(void)
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{
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fprintf(stderr, "usage: leave [[+]hhmm]\n");
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exit(1);
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}
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