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. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #ifndef lint 35 static char copyright[] = 36 "@(#) Copyright (c) 1980, 1988, 1993\n\ 37 The Regents of the University of California. All rights reserved.\n"; 38 #endif /* not lint */ 39 40 #ifndef lint 41 static char sccsid[] = "@(#)leave.c 8.1 (Berkeley) 6/6/93"; 42 #endif /* not lint */ 43 44 #include <sys/param.h> 45 #include <sys/time.h> 46 #include <stdio.h> 47 #include <ctype.h> 48 49 /* 50 * leave [[+]hhmm] 51 * 52 * Reminds you when you have to leave. 53 * Leave prompts for input and goes away if you hit return. 54 * It nags you like a mother hen. 55 */ 56 main(argc, argv) 57 int argc; 58 char **argv; 59 { 60 register u_int secs; 61 register int hours, minutes; 62 register char c, *cp; 63 struct tm *t, *localtime(); 64 time_t now, time(); 65 int plusnow; 66 char buf[50]; 67 68 if (argc < 2) { 69 #define MSG1 "When do you have to leave? " 70 (void)write(1, MSG1, sizeof(MSG1) - 1); 71 cp = fgets(buf, sizeof(buf), stdin); 72 if (*cp == '\n') 73 exit(0); 74 } else 75 cp = argv[1]; 76 77 if (*cp == '+') { 78 plusnow = 1; 79 ++cp; 80 } else { 81 plusnow = 0; 82 (void)time(&now); 83 t = localtime(&now); 84 } 85 86 for (hours = 0; (c = *cp) && c != '\n'; ++cp) { 87 if (!isdigit(c)) 88 usage(); 89 hours = hours * 10 + (c - '0'); 90 } 91 minutes = hours % 100; 92 hours /= 100; 93 94 if (minutes < 0 || minutes > 59) 95 usage(); 96 if (plusnow) 97 secs = hours * 60 * 60 + minutes * 60; 98 else { 99 if (hours > 23 || t->tm_hour > hours || 100 t->tm_hour == hours && minutes <= t->tm_min) 101 usage(); 102 secs = (hours - t->tm_hour) * 60 * 60; 103 secs += (minutes - t->tm_min) * 60; 104 } 105 doalarm(secs); 106 exit(0); 107 } 108 109 doalarm(secs) 110 u_int secs; 111 { 112 register int bother; 113 time_t daytime, time(); 114 int pid; 115 char *ctime(); 116 117 if (pid = fork()) { 118 (void)time(&daytime); 119 daytime += secs; 120 printf("Alarm set for %.16s. (pid %d)\n", 121 ctime(&daytime), pid); 122 exit(0); 123 } 124 sleep((u_int)2); /* let parent print set message */ 125 126 /* 127 * if write fails, we've lost the terminal through someone else 128 * causing a vhangup by logging in. 129 */ 130 #define FIVEMIN (5 * 60) 131 #define MSG2 "\07\07You have to leave in 5 minutes.\n" 132 if (secs >= FIVEMIN) { 133 sleep(secs - FIVEMIN); 134 if (write(1, MSG2, sizeof(MSG2) - 1) != sizeof(MSG2) - 1) 135 exit(0); 136 secs = FIVEMIN; 137 } 138 139 #define ONEMIN (60) 140 #define MSG3 "\07\07Just one more minute!\n" 141 if (secs >= ONEMIN) { 142 sleep(secs - ONEMIN); 143 if (write(1, MSG3, sizeof(MSG3) - 1) != sizeof(MSG3) - 1) 144 exit(0); 145 } 146 147 #define MSG4 "\07\07Time to leave!\n" 148 for (bother = 10; bother--;) { 149 sleep((u_int)ONEMIN); 150 if (write(1, MSG4, sizeof(MSG4) - 1) != sizeof(MSG4) - 1) 151 exit(0); 152 } 153 154 #define MSG5 "\07\07That was the last time I'll tell you. Bye.\n" 155 (void)write(1, MSG5, sizeof(MSG5) - 1); 156 exit(0); 157 } 158 159 usage() 160 { 161 fprintf(stderr, "usage: leave [[+]hhmm]\n"); 162 exit(1); 163 } 164