leave.c revision 27572
11590Srgrimes/* 21590Srgrimes * Copyright (c) 1980, 1988, 1993 31590Srgrimes * The Regents of the University of California. All rights reserved. 41590Srgrimes * 51590Srgrimes * Redistribution and use in source and binary forms, with or without 61590Srgrimes * modification, are permitted provided that the following conditions 71590Srgrimes * are met: 81590Srgrimes * 1. Redistributions of source code must retain the above copyright 91590Srgrimes * notice, this list of conditions and the following disclaimer. 101590Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 111590Srgrimes * notice, this list of conditions and the following disclaimer in the 121590Srgrimes * documentation and/or other materials provided with the distribution. 131590Srgrimes * 3. All advertising materials mentioning features or use of this software 141590Srgrimes * must display the following acknowledgement: 151590Srgrimes * This product includes software developed by the University of 161590Srgrimes * California, Berkeley and its contributors. 171590Srgrimes * 4. Neither the name of the University nor the names of its contributors 181590Srgrimes * may be used to endorse or promote products derived from this software 191590Srgrimes * without specific prior written permission. 201590Srgrimes * 211590Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 221590Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 231590Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 241590Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 251590Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 261590Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 271590Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 281590Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 291590Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 301590Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 311590Srgrimes * SUCH DAMAGE. 321590Srgrimes */ 331590Srgrimes 341590Srgrimes#ifndef lint 3527572Scharnierstatic const char copyright[] = 361590Srgrimes"@(#) Copyright (c) 1980, 1988, 1993\n\ 371590Srgrimes The Regents of the University of California. All rights reserved.\n"; 381590Srgrimes#endif /* not lint */ 391590Srgrimes 401590Srgrimes#ifndef lint 4127572Scharnier#if 0 421590Srgrimesstatic char sccsid[] = "@(#)leave.c 8.1 (Berkeley) 6/6/93"; 4327572Scharnier#endif 4427572Scharnierstatic const char rcsid[] = 4527572Scharnier "$Id$"; 461590Srgrimes#endif /* not lint */ 471590Srgrimes 481590Srgrimes#include <sys/param.h> 491590Srgrimes#include <sys/time.h> 5027572Scharnier#include <ctype.h> 511590Srgrimes#include <stdio.h> 5227572Scharnier#include <unistd.h> 531590Srgrimes 5427572Scharniervoid doalarm __P((u_int)); 5527572Scharnierstatic void usage __P((void)); 5627572Scharnier 571590Srgrimes/* 581590Srgrimes * leave [[+]hhmm] 591590Srgrimes * 601590Srgrimes * Reminds you when you have to leave. 611590Srgrimes * Leave prompts for input and goes away if you hit return. 621590Srgrimes * It nags you like a mother hen. 631590Srgrimes */ 6427572Scharnierint 651590Srgrimesmain(argc, argv) 661590Srgrimes int argc; 671590Srgrimes char **argv; 681590Srgrimes{ 691590Srgrimes register u_int secs; 701590Srgrimes register int hours, minutes; 711590Srgrimes register char c, *cp; 721590Srgrimes struct tm *t, *localtime(); 731590Srgrimes time_t now, time(); 741590Srgrimes int plusnow; 751590Srgrimes char buf[50]; 761590Srgrimes 771590Srgrimes if (argc < 2) { 781590Srgrimes#define MSG1 "When do you have to leave? " 791590Srgrimes (void)write(1, MSG1, sizeof(MSG1) - 1); 801590Srgrimes cp = fgets(buf, sizeof(buf), stdin); 8127572Scharnier if (cp == NULL || *cp == '\n') 821590Srgrimes exit(0); 831590Srgrimes } else 841590Srgrimes cp = argv[1]; 851590Srgrimes 861590Srgrimes if (*cp == '+') { 871590Srgrimes plusnow = 1; 881590Srgrimes ++cp; 891590Srgrimes } else { 901590Srgrimes plusnow = 0; 911590Srgrimes (void)time(&now); 921590Srgrimes t = localtime(&now); 931590Srgrimes } 941590Srgrimes 951590Srgrimes for (hours = 0; (c = *cp) && c != '\n'; ++cp) { 961590Srgrimes if (!isdigit(c)) 971590Srgrimes usage(); 981590Srgrimes hours = hours * 10 + (c - '0'); 991590Srgrimes } 1001590Srgrimes minutes = hours % 100; 1011590Srgrimes hours /= 100; 1021590Srgrimes 1031590Srgrimes if (minutes < 0 || minutes > 59) 1041590Srgrimes usage(); 1051590Srgrimes if (plusnow) 1061590Srgrimes secs = hours * 60 * 60 + minutes * 60; 1071590Srgrimes else { 1081590Srgrimes if (hours > 23 || t->tm_hour > hours || 10927572Scharnier (t->tm_hour == hours && minutes <= t->tm_min)) 1101590Srgrimes usage(); 1111590Srgrimes secs = (hours - t->tm_hour) * 60 * 60; 1121590Srgrimes secs += (minutes - t->tm_min) * 60; 1131590Srgrimes } 1141590Srgrimes doalarm(secs); 1151590Srgrimes exit(0); 1161590Srgrimes} 1171590Srgrimes 11827572Scharniervoid 1191590Srgrimesdoalarm(secs) 1201590Srgrimes u_int secs; 1211590Srgrimes{ 1221590Srgrimes register int bother; 1231590Srgrimes time_t daytime, time(); 1241590Srgrimes int pid; 1251590Srgrimes char *ctime(); 1261590Srgrimes 12727572Scharnier if ((pid = fork())) { 1281590Srgrimes (void)time(&daytime); 1291590Srgrimes daytime += secs; 1301590Srgrimes printf("Alarm set for %.16s. (pid %d)\n", 1311590Srgrimes ctime(&daytime), pid); 1321590Srgrimes exit(0); 1331590Srgrimes } 1341590Srgrimes sleep((u_int)2); /* let parent print set message */ 1351590Srgrimes 1361590Srgrimes /* 1371590Srgrimes * if write fails, we've lost the terminal through someone else 1381590Srgrimes * causing a vhangup by logging in. 1391590Srgrimes */ 1401590Srgrimes#define FIVEMIN (5 * 60) 1411590Srgrimes#define MSG2 "\07\07You have to leave in 5 minutes.\n" 1421590Srgrimes if (secs >= FIVEMIN) { 1431590Srgrimes sleep(secs - FIVEMIN); 1441590Srgrimes if (write(1, MSG2, sizeof(MSG2) - 1) != sizeof(MSG2) - 1) 1451590Srgrimes exit(0); 1461590Srgrimes secs = FIVEMIN; 1471590Srgrimes } 1481590Srgrimes 1491590Srgrimes#define ONEMIN (60) 1501590Srgrimes#define MSG3 "\07\07Just one more minute!\n" 1511590Srgrimes if (secs >= ONEMIN) { 1521590Srgrimes sleep(secs - ONEMIN); 1531590Srgrimes if (write(1, MSG3, sizeof(MSG3) - 1) != sizeof(MSG3) - 1) 1541590Srgrimes exit(0); 1551590Srgrimes } 1561590Srgrimes 1571590Srgrimes#define MSG4 "\07\07Time to leave!\n" 1581590Srgrimes for (bother = 10; bother--;) { 1591590Srgrimes sleep((u_int)ONEMIN); 1601590Srgrimes if (write(1, MSG4, sizeof(MSG4) - 1) != sizeof(MSG4) - 1) 1611590Srgrimes exit(0); 1621590Srgrimes } 1631590Srgrimes 1641590Srgrimes#define MSG5 "\07\07That was the last time I'll tell you. Bye.\n" 1651590Srgrimes (void)write(1, MSG5, sizeof(MSG5) - 1); 1661590Srgrimes exit(0); 1671590Srgrimes} 1681590Srgrimes 16927572Scharnierstatic void 1701590Srgrimesusage() 1711590Srgrimes{ 1721590Srgrimes fprintf(stderr, "usage: leave [[+]hhmm]\n"); 1731590Srgrimes exit(1); 1741590Srgrimes} 175