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/* $OpenBSD: leave.c,v 1.10 2003/06/10 22:20:47 deraadt Exp $ */
/* $NetBSD: leave.c,v 1.4 1995/07/03 16:50:13 phil Exp $ */
/*
* Copyright (c) 1980, 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.
*/
#ifndef lint
static char copyright[] =
"@(#) Copyright (c) 1980, 1988, 1993\n\
The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */
#ifndef lint
#if 0
static char sccsid[] = "@(#)leave.c 8.1 (Berkeley) 6/6/93";
#endif
static char rcsid[] = "$OpenBSD: leave.c,v 1.10 2003/06/10 22:20:47 deraadt Exp $";
#endif /* not lint */
#include <sys/param.h>
#include <sys/time.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <ctype.h>
void usage(void);
void doalarm(u_int secs);
/*
* leave [[+]hhmm]
*
* Reminds you when you have to leave.
* Leave prompts for input and goes away if you hit return.
* It nags you like a mother hen.
*/
int
main(int argc, char *argv[])
{
u_int secs;
int hours, minutes;
char c, *cp;
struct tm *t;
time_t now;
int plusnow;
char buf[50];
if (argc < 2) {
#define MSG1 "When do you have to leave? "
(void)write(STDOUT_FILENO, MSG1, sizeof(MSG1) - 1);
cp = fgets(buf, sizeof(buf), stdin);
if (cp == NULL || *cp == '\n')
exit(0);
} else if (argc > 2)
usage();
else
cp = argv[1];
if (*cp == '+') {
plusnow = 1;
++cp;
} else {
plusnow = 0;
(void)time(&now);
t = localtime(&now);
}
for (hours = 0; (c = *cp) && c != '\n'; ++cp) {
if (!isdigit(c))
usage();
hours = hours * 10 + (c - '0');
}
minutes = hours % 100;
hours /= 100;
if (minutes < 0 || minutes > 59)
usage();
if (plusnow)
secs = hours * 60 * 60 + minutes * 60;
else {
if (hours > 23)
usage();
if (t->tm_hour > hours ||
(t->tm_hour == hours && t->tm_min >= minutes)) {
/* determine 24 hours mode */
if (hours >= 13)
hours += 24;
else
hours += 12;
}
secs = (hours - t->tm_hour) * 60 * 60;
secs += (minutes - t->tm_min) * 60;
}
doalarm(secs);
exit(0);
}
void
doalarm(u_int secs)
{
int bother;
time_t daytime;
pid_t pid;
if ((pid = fork())) {
(void)time(&daytime);
daytime += secs;
printf("Alarm set for %.16s. (pid %ld)\n",
ctime(&daytime), (long)pid);
exit(0);
}
sleep((u_int)2); /* let parent print set message */
/*
* if write fails, we've lost the terminal through someone else
* causing a vhangup by logging in.
*/
#define FIVEMIN (5 * 60)
#define MSG2 "\07\07You have to leave in 5 minutes.\n"
if (secs >= FIVEMIN) {
sleep(secs - FIVEMIN);
if (write(STDOUT_FILENO, MSG2, sizeof(MSG2) - 1) != sizeof(MSG2) - 1)
exit(0);
secs = FIVEMIN;
}
#define ONEMIN (60)
#define MSG3 "\07\07Just one more minute!\n"
if (secs >= ONEMIN) {
sleep(secs - ONEMIN);
if (write(STDOUT_FILENO, MSG3, sizeof(MSG3) - 1) != sizeof(MSG3) - 1)
exit(0);
}
#define MSG4 "\07\07Time to leave!\n"
for (bother = 10; bother--;) {
sleep((u_int)ONEMIN);
if (write(STDOUT_FILENO, MSG4, sizeof(MSG4) - 1) != sizeof(MSG4) - 1)
exit(0);
}
#define MSG5 "\07\07That was the last time I'll tell you. Bye.\n"
(void)write(STDOUT_FILENO, MSG5, sizeof(MSG5) - 1);
exit(0);
}
void
usage(void)
{
fprintf(stderr, "usage: leave [[+]hhmm]\n");
exit(1);
}
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