freebsd-dev/usr.bin/leave/leave.c
Warner Losh fbbd9655e5 Renumber copyright clause 4
Renumber cluase 4 to 3, per what everybody else did when BSD granted
them permission to remove clause 3. My insistance on keeping the same
numbering for legal reasons is too pedantic, so give up on that point.

Submitted by:	Jan Schaumann <jschauma@stevens.edu>
Pull Request:	https://github.com/freebsd/freebsd/pull/96
2017-02-28 23:42:47 +00:00

193 lines
4.9 KiB
C

/*
* 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 const 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
#endif /* not lint */
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <err.h>
#include <ctype.h>
#include <locale.h>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <unistd.h>
static void doalarm(u_int);
static void usage(void);
/*
* 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 = NULL;
struct tm *t;
time_t now;
int plusnow, t_12_hour;
char buf[50];
if (setlocale(LC_TIME, "") == NULL)
warn("setlocale");
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;
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 {
(void)time(&now);
t = localtime(&now);
if (hours > 23)
usage();
/* Convert tol to 12 hr time (0:00...11:59) */
if (hours > 11)
hours -= 12;
/* Convert tm to 12 hr time (0:00...11:59) */
if (t->tm_hour > 11)
t_12_hour = t->tm_hour - 12;
else
t_12_hour = t->tm_hour;
if (hours < t_12_hour ||
(hours == t_12_hour && minutes <= t->tm_min))
/* Leave time is in the past so we add 12 hrs */
hours += 12;
secs = (hours - t_12_hour) * 60 * 60;
secs += (minutes - t->tm_min) * 60;
secs -= now % 60; /* truncate (now + secs) to min */
}
doalarm(secs);
exit(0);
}
void
doalarm(u_int secs)
{
int bother;
time_t daytime;
char tb[80];
int pid;
if ((pid = fork())) {
(void)time(&daytime);
daytime += secs;
strftime(tb, sizeof(tb), "%+", localtime(&daytime));
printf("Alarm set for %s. (pid %d)\n", tb, pid);
exit(0);
}
sleep((u_int)2); /* let parent print set message */
if (secs >= 2)
secs -= 2;
/*
* 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);
}
static void
usage(void)
{
fprintf(stderr, "usage: leave [[+]hhmm]\n");
exit(1);
}