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