1/* $NetBSD: leave.c,v 1.14 2008/07/21 14:19:23 lukem Exp $ */ 2 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 <sys/cdefs.h> 33#ifndef lint 34__COPYRIGHT("@(#) Copyright (c) 1980, 1988, 1993\ 35 The Regents of the University of California. All rights reserved."); 36#endif /* not lint */ 37 38#ifndef lint 39#if 0 40static char sccsid[] = "@(#)leave.c 8.1 (Berkeley) 6/6/93"; 41#else 42__RCSID("$NetBSD: leave.c,v 1.14 2008/07/21 14:19:23 lukem Exp $"); 43#endif 44#endif /* not lint */ 45 46#include <sys/param.h> 47#include <sys/time.h> 48#include <ctype.h> 49#include <stdio.h> 50#include <stdlib.h> 51#include <time.h> 52#include <err.h> 53#include <unistd.h> 54 55#define SECOND 1 56#define MINUTE (SECOND * 60) 57#define HOUR (MINUTE * 60) 58 59/* 60 * leave [[+]hhmm] 61 * 62 * Reminds you when you have to leave. 63 * Leave prompts for input and goes away if you hit return. 64 * It nags you like a mother hen. 65 */ 66 67__dead static void doalarm(u_int); 68__dead static void usage(void); 69 70int 71main(int argc, char **argv) 72{ 73 u_int secs; 74 int hours, minutes; 75 char c, *cp; 76 struct tm *t = NULL; 77 time_t now; 78 int plusnow; 79 char buf[50]; 80 81 if (setvbuf(stdout, NULL, _IONBF, 0) != 0) 82 errx(1, "Cannot set stdout to unbuffered."); 83 84 if (argc < 2) { 85 (void)puts("When do you have to leave? "); 86 cp = fgets(buf, sizeof(buf), stdin); 87 if (cp == NULL || *cp == '\n') 88 exit(0); 89 } else 90 cp = argv[1]; 91 92 if (*cp == '+') { 93 plusnow = 1; 94 ++cp; 95 } else { 96 plusnow = 0; 97 (void)time(&now); 98 t = localtime(&now); 99 } 100 101 for (hours = 0; (c = *cp) && c != '\n'; ++cp) { 102 if (!isdigit((unsigned char)c)) 103 usage(); 104 hours = hours * 10 + (c - '0'); 105 } 106 minutes = hours % 100; 107 hours /= 100; 108 109 if (minutes < 0 || minutes > 59) 110 usage(); 111 if (plusnow) 112 secs = (hours * HOUR) + (minutes * MINUTE); 113 else { 114 if (hours > 23) 115 usage(); 116 if (t->tm_hour >= 12) 117 t->tm_hour -= 12; 118 if (hours >= 12) 119 hours -= 12; 120 if (t->tm_hour > hours || 121 (t->tm_hour == hours && minutes <= t->tm_min)) 122 hours += 12; 123 secs = (hours - t->tm_hour) * HOUR; 124 secs += (minutes - t->tm_min) * MINUTE; 125 } 126 doalarm(secs); 127 exit(0); 128} 129 130static void 131doalarm(u_int secs) 132{ 133 int bother; 134 time_t daytime; 135 136 switch (fork()) { 137 case 0: 138 break; 139 case -1: 140 err(1, "Fork failed"); 141 /*NOTREACHED*/ 142 default: 143 exit(0); 144 } 145 146 (void)time(&daytime); 147 daytime += secs; 148 printf("Alarm set for %.16s. (pid %u)\n", 149 ctime(&daytime), (unsigned)getpid()); 150 151 /* 152 * if write fails, we've lost the terminal through someone else 153 * causing a vhangup by logging in. 154 */ 155#define FIVEMIN (5 * MINUTE) 156 if (secs >= FIVEMIN) { 157 sleep(secs - FIVEMIN); 158 if (puts("\07\07You have to leave in 5 minutes.\n") == EOF) 159 exit(0); 160 secs = FIVEMIN; 161 } 162 163#define ONEMIN (MINUTE) 164 if (secs >= ONEMIN) { 165 sleep(secs - ONEMIN); 166 if (puts("\07\07Just one more minute!\n") == EOF) 167 exit(0); 168 } 169 170 for (bother = 10; bother--;) { 171 sleep((u_int)ONEMIN); 172 if (puts("\07\07Time to leave!\n") == EOF) 173 exit(0); 174 } 175 176 (void)puts("\07\07That was the last time I'll tell you. Bye.\n"); 177 exit(0); 178} 179 180static void 181usage(void) 182{ 183 (void)fprintf(stderr, "usage: %s [[+]hhmm]\n", getprogname()); 184 exit(1); 185} 186