leave.c revision 32295 
1/*
2 * Copyright (c) 1980, 1988, 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *	This product includes software developed by the University of
16 *	California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#ifndef lint
35static const char copyright[] =
36"@(#) Copyright (c) 1980, 1988, 1993\n\
37	The Regents of the University of California.  All rights reserved.\n";
38#endif /* not lint */
39
40#ifndef lint
41#if 0
42static char sccsid[] = "@(#)leave.c	8.1 (Berkeley) 6/6/93";
43#endif
44static const char rcsid[] =
45	"$Id: leave.c,v 1.2 1997/07/21 12:04:31 charnier Exp $";
46#endif /* not lint */
47
48#include <err.h>
49#include <ctype.h>
50#include <locale.h>
51#include <stdio.h>
52#include <time.h>
53#include <unistd.h>
54
55void doalarm __P((u_int));
56static void usage __P((void));
57
58/*
59 * leave [[+]hhmm]
60 *
61 * Reminds you when you have to leave.
62 * Leave prompts for input and goes away if you hit return.
63 * It nags you like a mother hen.
64 */
65int
66main(argc, argv)
67	int argc;
68	char **argv;
69{
70	register u_int secs;
71	register int hours, minutes;
72	register char c, *cp;
73	struct tm *t, *localtime();
74	time_t now, time();
75	int plusnow, t_12_hour;
76	char buf[50];
77
78	if (setlocale(LC_TIME, "") == NULL)
79		warn("setlocale");
80
81	if (argc < 2) {
82#define	MSG1	"When do you have to leave? "
83		(void)write(1, MSG1, sizeof(MSG1) - 1);
84		cp = fgets(buf, sizeof(buf), stdin);
85		if (cp == NULL || *cp == '\n')
86			exit(0);
87	} else
88		cp = argv[1];
89
90	if (*cp == '+') {
91		plusnow = 1;
92		++cp;
93	} else
94		plusnow = 0;
95
96	for (hours = 0; (c = *cp) && c != '\n'; ++cp) {
97		if (!isdigit(c))
98			usage();
99		hours = hours * 10 + (c - '0');
100	}
101	minutes = hours % 100;
102	hours /= 100;
103
104	if (minutes < 0 || minutes > 59)
105		usage();
106	if (plusnow)
107		secs = hours * 60 * 60 + minutes * 60;
108	else {
109		(void)time(&now);
110		t = localtime(&now);
111
112		if (hours > 23)
113			usage();
114
115		/* Convert tol to 12 hr time (0:00...11:59) */
116		if (hours > 11)
117			hours -= 12;
118
119		/* Convert tm to 12 hr time (0:00...11:59) */
120		if (t->tm_hour > 11)
121			t_12_hour = t->tm_hour - 12;
122		else
123			t_12_hour = t->tm_hour;
124
125		if (hours < t_12_hour ||
126	 	   (hours == t_12_hour && minutes <= t->tm_min))
127			/* Leave time is in the past so we add 12 hrs */
128			hours += 12;
129
130		secs = (hours - t_12_hour) * 60 * 60;
131		secs += (minutes - t->tm_min) * 60;
132		secs -= now % 60;	/* truncate (now + secs) to min */
133	}
134	doalarm(secs);
135	exit(0);
136}
137
138void
139doalarm(secs)
140	u_int secs;
141{
142	register int bother;
143	time_t daytime, time();
144	char tb[80];
145	int pid;
146
147	if ((pid = fork())) {
148		(void)time(&daytime);
149		daytime += secs;
150		strftime(tb, sizeof(tb), "%+", localtime(&daytime));
151		printf("Alarm set for %s. (pid %d)\n", tb, pid);
152		exit(0);
153	}
154	sleep((u_int)2);		/* let parent print set message */
155	secs -= 2;
156
157	/*
158	 * if write fails, we've lost the terminal through someone else
159	 * causing a vhangup by logging in.
160	 */
161#define	FIVEMIN	(5 * 60)
162#define	MSG2	"\07\07You have to leave in 5 minutes.\n"
163	if (secs >= FIVEMIN) {
164		sleep(secs - FIVEMIN);
165		if (write(1, MSG2, sizeof(MSG2) - 1) != sizeof(MSG2) - 1)
166			exit(0);
167		secs = FIVEMIN;
168	}
169
170#define	ONEMIN	(60)
171#define	MSG3	"\07\07Just one more minute!\n"
172	if (secs >= ONEMIN) {
173		sleep(secs - ONEMIN);
174		if (write(1, MSG3, sizeof(MSG3) - 1) != sizeof(MSG3) - 1)
175			exit(0);
176	}
177
178#define	MSG4	"\07\07Time to leave!\n"
179	for (bother = 10; bother--;) {
180		sleep((u_int)ONEMIN);
181		if (write(1, MSG4, sizeof(MSG4) - 1) != sizeof(MSG4) - 1)
182			exit(0);
183	}
184
185#define	MSG5	"\07\07That was the last time I'll tell you.  Bye.\n"
186	(void)write(1, MSG5, sizeof(MSG5) - 1);
187	exit(0);
188}
189
190static void
191usage()
192{
193	fprintf(stderr, "usage: leave [[+]hhmm]\n");
194	exit(1);
195}
196