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. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * @(#) Copyright (c) 1980, 1988, 1993 The Regents of the University of California. All rights reserved.
30 * @(#)leave.c 8.1 (Berkeley) 6/6/93
31 * $FreeBSD: src/usr.bin/leave/leave.c,v 1.5.2.2 2001/07/30 09:43:30 dd Exp $
32 */
33
34 #include <err.h>
35 #include <ctype.h>
36 #include <langinfo.h>
37 #include <locale.h>
38 #include <stdio.h>
39 #include <stdlib.h>
40 #include <time.h>
41 #include <unistd.h>
42
43 static void doalarm(u_int) __dead2;
44 static void usage(void) __dead2;
45
46 /*
47 * leave [[+]hhmm]
48 *
49 * Reminds you when you have to leave.
50 * Leave prompts for input and goes away if you hit return.
51 * It nags you like a mother hen.
52 */
53 int
main(int argc,char ** argv)54 main(int argc, char **argv)
55 {
56 u_int secs;
57 int hours, minutes;
58 char c, *cp = NULL;
59 struct tm *t;
60 time_t now;
61 int plusnow, t_12_hour;
62 char buf[50];
63
64 if (setlocale(LC_TIME, "") == NULL)
65 warn("setlocale");
66
67 if (argc < 2) {
68 #define MSG1 "When do you have to leave? "
69 (void)write(1, MSG1, sizeof(MSG1) - 1);
70 cp = fgets(buf, sizeof(buf), stdin);
71 if (cp == NULL || *cp == '\n')
72 exit(0);
73 } else if (argc > 2)
74 usage();
75 else
76 cp = argv[1];
77
78 if (*cp == '+') {
79 plusnow = 1;
80 ++cp;
81 } else
82 plusnow = 0;
83
84 for (hours = 0; (c = *cp) && c != '\n'; ++cp) {
85 if (!isdigit(c))
86 usage();
87 hours = hours * 10 + (c - '0');
88 }
89 minutes = hours % 100;
90 hours /= 100;
91
92 /*
93 * NOTE: Allows minutes specifications > 59 for +now usages,
94 * just like microwaves have for decades. -Matt
95 */
96 if (minutes < 0)
97 usage();
98
99 if (plusnow) {
100 secs = hours * 60 * 60 + minutes * 60;
101 } else {
102 if (minutes > 59)
103 usage();
104 (void)time(&now);
105 t = localtime(&now);
106
107 if (hours > 23)
108 usage();
109
110 /* Convert tol to 12 hr time (0:00...11:59) */
111 if (hours > 11)
112 hours -= 12;
113
114 /* Convert tm to 12 hr time (0:00...11:59) */
115 if (t->tm_hour > 11)
116 t_12_hour = t->tm_hour - 12;
117 else
118 t_12_hour = t->tm_hour;
119
120 if (hours < t_12_hour ||
121 (hours == t_12_hour && minutes <= t->tm_min))
122 /* Leave time is in the past so we add 12 hrs */
123 hours += 12;
124
125 secs = (hours - t_12_hour) * 60 * 60;
126 secs += (minutes - t->tm_min) * 60;
127 secs -= now % 60; /* truncate (now + secs) to min */
128 }
129 doalarm(secs);
130 exit(0);
131 }
132
133 static void
doalarm(u_int secs)134 doalarm(u_int secs)
135 {
136 int bother;
137 time_t daytime;
138 char tb[80];
139 int pid;
140
141 if ((pid = fork())) {
142 (void)time(&daytime);
143 daytime += secs;
144 strftime(tb, sizeof(tb), nl_langinfo(D_T_FMT),
145 localtime(&daytime));
146 printf("Alarm set for %s. (pid %d)\n", tb, pid);
147 exit(0);
148 }
149 sleep((u_int)2); /* let parent print set message */
150 if (secs >= 2)
151 secs -= 2;
152
153 /*
154 * if write fails, we've lost the terminal through someone else
155 * causing a vhangup by logging in.
156 */
157 #define FIVEMIN (5 * 60)
158 #define MSG2 "\07\07You have to leave in 5 minutes.\n"
159 if (secs >= FIVEMIN) {
160 sleep(secs - FIVEMIN);
161 if (write(1, MSG2, sizeof(MSG2) - 1) != sizeof(MSG2) - 1)
162 exit(0);
163 secs = FIVEMIN;
164 }
165
166 #define ONEMIN (60)
167 #define MSG3 "\07\07Just one more minute!\n"
168 if (secs >= ONEMIN) {
169 sleep(secs - ONEMIN);
170 if (write(1, MSG3, sizeof(MSG3) - 1) != sizeof(MSG3) - 1)
171 exit(0);
172 }
173
174 #define MSG4 "\07\07Time to leave!\n"
175 for (bother = 10; bother--;) {
176 sleep((u_int)ONEMIN);
177 if (write(1, MSG4, sizeof(MSG4) - 1) != sizeof(MSG4) - 1)
178 exit(0);
179 }
180
181 #define MSG5 "\07\07That was the last time I'll tell you. Bye.\n"
182 (void)write(1, MSG5, sizeof(MSG5) - 1);
183 exit(0);
184 }
185
186 static void
usage(void)187 usage(void)
188 {
189 fprintf(stderr, "usage: leave [[+]hhmm]\n");
190 exit(1);
191 }
192