1 /* $OpenBSD: leave.c,v 1.5 2000/09/20 21:57:37 pjanzen Exp $ */ 2 /* $NetBSD: leave.c,v 1.4 1995/07/03 16:50:13 phil Exp $ */ 3 4 /* 5 * Copyright (c) 1980, 1988, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 */ 36 37 #ifndef lint 38 static char copyright[] = 39 "@(#) Copyright (c) 1980, 1988, 1993\n\ 40 The Regents of the University of California. All rights reserved.\n"; 41 #endif /* not lint */ 42 43 #ifndef lint 44 #if 0 45 static char sccsid[] = "@(#)leave.c 8.1 (Berkeley) 6/6/93"; 46 #endif 47 static char rcsid[] = "$OpenBSD: leave.c,v 1.5 2000/09/20 21:57:37 pjanzen Exp $"; 48 #endif /* not lint */ 49 50 #include <sys/param.h> 51 #include <sys/time.h> 52 #include <unistd.h> 53 #include <stdlib.h> 54 #include <stdio.h> 55 #include <ctype.h> 56 57 void usage __P((void)); 58 void doalarm __P((u_int secs)); 59 60 /* 61 * leave [[+]hhmm] 62 * 63 * Reminds you when you have to leave. 64 * Leave prompts for input and goes away if you hit return. 65 * It nags you like a mother hen. 66 */ 67 int 68 main(argc, argv) 69 int argc; 70 char **argv; 71 { 72 register u_int secs; 73 register int hours, minutes; 74 register char c, *cp; 75 struct tm *t; 76 time_t now; 77 int plusnow; 78 char buf[50]; 79 80 if (argc < 2) { 81 #define MSG1 "When do you have to leave? " 82 (void)write(STDOUT_FILENO, MSG1, sizeof(MSG1) - 1); 83 cp = fgets(buf, sizeof(buf), stdin); 84 if (cp == NULL || *cp == '\n') 85 exit(0); 86 } else if (argc > 2) 87 usage(); 88 else 89 cp = argv[1]; 90 91 if (*cp == '+') { 92 plusnow = 1; 93 ++cp; 94 } else { 95 plusnow = 0; 96 (void)time(&now); 97 t = localtime(&now); 98 } 99 100 for (hours = 0; (c = *cp) && c != '\n'; ++cp) { 101 if (!isdigit(c)) 102 usage(); 103 hours = hours * 10 + (c - '0'); 104 } 105 minutes = hours % 100; 106 hours /= 100; 107 108 if (minutes < 0 || minutes > 59) 109 usage(); 110 if (plusnow) 111 secs = hours * 60 * 60 + minutes * 60; 112 else { 113 if (hours > 23) 114 usage(); 115 if (t->tm_hour > hours || 116 (t->tm_hour == hours && t->tm_min >= minutes)) { 117 /* determine 24 hours mode */ 118 if (hours >= 13) 119 hours += 24; 120 else 121 hours += 12; 122 } 123 124 secs = (hours - t->tm_hour) * 60 * 60; 125 secs += (minutes - t->tm_min) * 60; 126 } 127 doalarm(secs); 128 exit(0); 129 } 130 131 void 132 doalarm(secs) 133 u_int secs; 134 { 135 register int bother; 136 time_t daytime; 137 int pid; 138 139 if ((pid = fork())) { 140 (void)time(&daytime); 141 daytime += secs; 142 printf("Alarm set for %.16s. (pid %d)\n", 143 ctime(&daytime), pid); 144 exit(0); 145 } 146 sleep((u_int)2); /* let parent print set message */ 147 148 /* 149 * if write fails, we've lost the terminal through someone else 150 * causing a vhangup by logging in. 151 */ 152 #define FIVEMIN (5 * 60) 153 #define MSG2 "\07\07You have to leave in 5 minutes.\n" 154 if (secs >= FIVEMIN) { 155 sleep(secs - FIVEMIN); 156 if (write(STDOUT_FILENO, MSG2, sizeof(MSG2) - 1) != sizeof(MSG2) - 1) 157 exit(0); 158 secs = FIVEMIN; 159 } 160 161 #define ONEMIN (60) 162 #define MSG3 "\07\07Just one more minute!\n" 163 if (secs >= ONEMIN) { 164 sleep(secs - ONEMIN); 165 if (write(STDOUT_FILENO, MSG3, sizeof(MSG3) - 1) != sizeof(MSG3) - 1) 166 exit(0); 167 } 168 169 #define MSG4 "\07\07Time to leave!\n" 170 for (bother = 10; bother--;) { 171 sleep((u_int)ONEMIN); 172 if (write(STDOUT_FILENO, MSG4, sizeof(MSG4) - 1) != sizeof(MSG4) - 1) 173 exit(0); 174 } 175 176 #define MSG5 "\07\07That was the last time I'll tell you. Bye.\n" 177 (void)write(STDOUT_FILENO, MSG5, sizeof(MSG5) - 1); 178 exit(0); 179 } 180 181 void 182 usage() 183 { 184 fprintf(stderr, "usage: leave [[+]hhmm]\n"); 185 exit(1); 186 } 187