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 #include <err.h> 33 #include <ctype.h> 34 #include <locale.h> 35 #include <stdio.h> 36 #include <stdlib.h> 37 #include <time.h> 38 #include <unistd.h> 39 40 static void doalarm(u_int); 41 static void usage(void) __dead2; 42 43 /* 44 * leave [[+]hhmm] 45 * 46 * Reminds you when you have to leave. 47 * Leave prompts for input and goes away if you hit return. 48 * It nags you like a mother hen. 49 */ 50 int 51 main(int argc, char **argv) 52 { 53 u_int secs; 54 int hours, minutes; 55 char c, *cp = NULL; 56 struct tm *t; 57 time_t now; 58 int plusnow, t_12_hour; 59 char buf[50]; 60 61 if (setlocale(LC_TIME, "") == NULL) 62 warn("setlocale"); 63 64 if (argc < 2) { 65 #define MSG1 "When do you have to leave? " 66 (void)write(STDOUT_FILENO, MSG1, sizeof(MSG1) - 1); 67 cp = fgets(buf, sizeof(buf), stdin); 68 if (cp == NULL || *cp == '\n') 69 exit(0); 70 } else if (argc > 2) 71 usage(); 72 else 73 cp = argv[1]; 74 75 if (*cp == '+') { 76 plusnow = 1; 77 ++cp; 78 } else 79 plusnow = 0; 80 81 for (hours = 0; (c = *cp) && c != '\n'; ++cp) { 82 if (!isdigit(c)) 83 usage(); 84 hours = hours * 10 + (c - '0'); 85 } 86 minutes = hours % 100; 87 hours /= 100; 88 89 if (minutes < 0 || minutes > 59) 90 usage(); 91 if (plusnow) 92 secs = hours * 60 * 60 + minutes * 60; 93 else { 94 (void)time(&now); 95 t = localtime(&now); 96 97 if (hours > 23) 98 usage(); 99 100 /* Convert tol to 12 hr time (0:00...11:59) */ 101 if (hours > 11) 102 hours -= 12; 103 104 /* Convert tm to 12 hr time (0:00...11:59) */ 105 if (t->tm_hour > 11) 106 t_12_hour = t->tm_hour - 12; 107 else 108 t_12_hour = t->tm_hour; 109 110 if (hours < t_12_hour || 111 (hours == t_12_hour && minutes <= t->tm_min)) 112 /* Leave time is in the past so we add 12 hrs */ 113 hours += 12; 114 115 secs = (hours - t_12_hour) * 60 * 60; 116 secs += (minutes - t->tm_min) * 60; 117 secs -= now % 60; /* truncate (now + secs) to min */ 118 } 119 doalarm(secs); 120 exit(0); 121 } 122 123 void 124 doalarm(u_int secs) 125 { 126 int bother; 127 time_t daytime; 128 char tb[80]; 129 int pid; 130 131 if ((pid = fork())) { 132 (void)time(&daytime); 133 daytime += secs; 134 strftime(tb, sizeof(tb), "%+", localtime(&daytime)); 135 printf("Alarm set for %s. (pid %d)\n", tb, pid); 136 exit(0); 137 } 138 sleep((u_int)2); /* let parent print set message */ 139 if (secs >= 2) 140 secs -= 2; 141 142 /* 143 * if write fails, we've lost the terminal through someone else 144 * causing a vhangup by logging in. 145 */ 146 #define FIVEMIN (5 * 60) 147 #define MSG2 "\07\07You have to leave in 5 minutes.\n" 148 if (secs >= FIVEMIN) { 149 sleep(secs - FIVEMIN); 150 if (write(STDOUT_FILENO, MSG2, sizeof(MSG2) - 1) != sizeof(MSG2) - 1) 151 exit(0); 152 secs = FIVEMIN; 153 } 154 155 #define ONEMIN (60) 156 #define MSG3 "\07\07Just one more minute!\n" 157 if (secs >= ONEMIN) { 158 sleep(secs - ONEMIN); 159 if (write(STDOUT_FILENO, MSG3, sizeof(MSG3) - 1) != sizeof(MSG3) - 1) 160 exit(0); 161 } 162 163 #define MSG4 "\07\07Time to leave!\n" 164 for (bother = 10; bother--;) { 165 sleep((u_int)ONEMIN); 166 if (write(STDOUT_FILENO, MSG4, sizeof(MSG4) - 1) != sizeof(MSG4) - 1) 167 exit(0); 168 } 169 170 #define MSG5 "\07\07That was the last time I'll tell you. Bye.\n" 171 (void)write(STDOUT_FILENO, MSG5, sizeof(MSG5) - 1); 172 exit(0); 173 } 174 175 static void 176 usage(void) 177 { 178 fprintf(stderr, "usage: leave [[+]hhmm]\n"); 179 exit(1); 180 } 181