1 /* $NetBSD: leave.c,v 1.9 2000/07/03 02:51:22 matt 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. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 #ifndef lint 38 __COPYRIGHT("@(#) Copyright (c) 1980, 1988, 1993\n\ 39 The Regents of the University of California. All rights reserved.\n"); 40 #endif /* not lint */ 41 42 #ifndef lint 43 #if 0 44 static char sccsid[] = "@(#)leave.c 8.1 (Berkeley) 6/6/93"; 45 #else 46 __RCSID("$NetBSD: leave.c,v 1.9 2000/07/03 02:51:22 matt Exp $"); 47 #endif 48 #endif /* not lint */ 49 50 #include <sys/param.h> 51 #include <sys/time.h> 52 #include <ctype.h> 53 #include <stdio.h> 54 #include <stdlib.h> 55 #include <time.h> 56 #include <unistd.h> 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 */ 65 66 int main __P((int argc, char **argv)); 67 void doalarm __P((u_int)); 68 void usage __P((void)); 69 70 int 71 main(argc, argv) 72 int argc; 73 char **argv; 74 { 75 register u_int secs; 76 register int hours, minutes; 77 register char c, *cp; 78 struct tm *t; 79 time_t now; 80 int plusnow; 81 char buf[50]; 82 83 #ifdef __GNUC__ 84 t = NULL; /* XXX gcc -Wuninitialized */ 85 #endif 86 87 if (argc < 2) { 88 #define MSG1 "When do you have to leave? " 89 (void)write(STDOUT_FILENO, MSG1, sizeof(MSG1) - 1); 90 cp = fgets(buf, sizeof(buf), stdin); 91 if (cp == NULL || *cp == '\n') 92 exit(0); 93 } else 94 cp = argv[1]; 95 96 if (*cp == '+') { 97 plusnow = 1; 98 ++cp; 99 } else { 100 plusnow = 0; 101 (void)time(&now); 102 t = localtime(&now); 103 } 104 105 for (hours = 0; (c = *cp) && c != '\n'; ++cp) { 106 if (!isdigit((unsigned char)c)) 107 usage(); 108 hours = hours * 10 + (c - '0'); 109 } 110 minutes = hours % 100; 111 hours /= 100; 112 113 if (minutes < 0 || minutes > 59) 114 usage(); 115 if (plusnow) 116 secs = hours * 60 * 60 + minutes * 60; 117 else { 118 if (hours > 23) 119 usage(); 120 if (t->tm_hour >= 12) 121 t->tm_hour -= 12; 122 if (t->tm_hour > hours || 123 (t->tm_hour == hours && minutes <= t->tm_min)) 124 hours += 12; 125 secs = (hours - t->tm_hour) * 60 * 60; 126 secs += (minutes - t->tm_min) * 60; 127 } 128 doalarm(secs); 129 exit(0); 130 } 131 132 void 133 doalarm(secs) 134 u_int secs; 135 { 136 register int bother; 137 time_t daytime; 138 int pid; 139 140 if ((pid = fork()) != 0) { 141 (void)time(&daytime); 142 daytime += secs; 143 printf("Alarm set for %.16s. (pid %d)\n", 144 ctime(&daytime), pid); 145 exit(0); 146 } 147 sleep((u_int)2); /* let parent print set message */ 148 149 /* 150 * if write fails, we've lost the terminal through someone else 151 * causing a vhangup by logging in. 152 */ 153 #define FIVEMIN (5 * 60) 154 #define MSG2 "\07\07You have to leave in 5 minutes.\n" 155 if (secs >= FIVEMIN) { 156 sleep(secs - FIVEMIN); 157 if (write(STDOUT_FILENO, MSG2, sizeof(MSG2) - 1) != 158 sizeof(MSG2) - 1) 159 exit(0); 160 secs = FIVEMIN; 161 } 162 163 #define ONEMIN (60) 164 #define MSG3 "\07\07Just one more minute!\n" 165 if (secs >= ONEMIN) { 166 sleep(secs - ONEMIN); 167 if (write(STDOUT_FILENO, MSG3, sizeof(MSG3) - 1) != 168 sizeof(MSG3) - 1) 169 exit(0); 170 } 171 172 #define MSG4 "\07\07Time to leave!\n" 173 for (bother = 10; bother--;) { 174 sleep((u_int)ONEMIN); 175 if (write(STDOUT_FILENO, MSG4, sizeof(MSG4) - 1) != 176 sizeof(MSG4) - 1) 177 exit(0); 178 } 179 180 #define MSG5 "\07\07That was the last time I'll tell you. Bye.\n" 181 (void)write(STDOUT_FILENO, MSG5, sizeof(MSG5) - 1); 182 exit(0); 183 } 184 185 void 186 usage() 187 { 188 fprintf(stderr, "usage: leave [[+]hhmm]\n"); 189 exit(1); 190 } 191