Annotation of src/usr.bin/leave/leave.c, Revision 1.1
1.1 ! deraadt 1: /* $NetBSD: leave.c,v 1.4 1995/07/03 16:50:13 phil 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: #ifndef lint
! 37: static char copyright[] =
! 38: "@(#) 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: #endif
! 46: static char rcsid[] = "$NetBSD: leave.c,v 1.4 1995/07/03 16:50:13 phil Exp $";
! 47: #endif /* not lint */
! 48:
! 49: #include <sys/param.h>
! 50: #include <sys/time.h>
! 51: #include <stdio.h>
! 52: #include <ctype.h>
! 53:
! 54: /*
! 55: * leave [[+]hhmm]
! 56: *
! 57: * Reminds you when you have to leave.
! 58: * Leave prompts for input and goes away if you hit return.
! 59: * It nags you like a mother hen.
! 60: */
! 61: main(argc, argv)
! 62: int argc;
! 63: char **argv;
! 64: {
! 65: register u_int secs;
! 66: register int hours, minutes;
! 67: register char c, *cp;
! 68: struct tm *t, *localtime();
! 69: time_t now, time();
! 70: int plusnow;
! 71: char buf[50];
! 72:
! 73: if (argc < 2) {
! 74: #define MSG1 "When do you have to leave? "
! 75: (void)write(1, MSG1, sizeof(MSG1) - 1);
! 76: cp = fgets(buf, sizeof(buf), stdin);
! 77: if (cp == NULL || *cp == '\n')
! 78: exit(0);
! 79: } else
! 80: cp = argv[1];
! 81:
! 82: if (*cp == '+') {
! 83: plusnow = 1;
! 84: ++cp;
! 85: } else {
! 86: plusnow = 0;
! 87: (void)time(&now);
! 88: t = localtime(&now);
! 89: }
! 90:
! 91: for (hours = 0; (c = *cp) && c != '\n'; ++cp) {
! 92: if (!isdigit(c))
! 93: usage();
! 94: hours = hours * 10 + (c - '0');
! 95: }
! 96: minutes = hours % 100;
! 97: hours /= 100;
! 98:
! 99: if (minutes < 0 || minutes > 59)
! 100: usage();
! 101: if (plusnow)
! 102: secs = hours * 60 * 60 + minutes * 60;
! 103: else {
! 104: if (hours > 23 || t->tm_hour > hours ||
! 105: t->tm_hour == hours && minutes <= t->tm_min)
! 106: usage();
! 107: secs = (hours - t->tm_hour) * 60 * 60;
! 108: secs += (minutes - t->tm_min) * 60;
! 109: }
! 110: doalarm(secs);
! 111: exit(0);
! 112: }
! 113:
! 114: doalarm(secs)
! 115: u_int secs;
! 116: {
! 117: register int bother;
! 118: time_t daytime, time();
! 119: int pid;
! 120: char *ctime();
! 121:
! 122: if (pid = fork()) {
! 123: (void)time(&daytime);
! 124: daytime += secs;
! 125: printf("Alarm set for %.16s. (pid %d)\n",
! 126: ctime(&daytime), pid);
! 127: exit(0);
! 128: }
! 129: sleep((u_int)2); /* let parent print set message */
! 130:
! 131: /*
! 132: * if write fails, we've lost the terminal through someone else
! 133: * causing a vhangup by logging in.
! 134: */
! 135: #define FIVEMIN (5 * 60)
! 136: #define MSG2 "\07\07You have to leave in 5 minutes.\n"
! 137: if (secs >= FIVEMIN) {
! 138: sleep(secs - FIVEMIN);
! 139: if (write(1, MSG2, sizeof(MSG2) - 1) != sizeof(MSG2) - 1)
! 140: exit(0);
! 141: secs = FIVEMIN;
! 142: }
! 143:
! 144: #define ONEMIN (60)
! 145: #define MSG3 "\07\07Just one more minute!\n"
! 146: if (secs >= ONEMIN) {
! 147: sleep(secs - ONEMIN);
! 148: if (write(1, MSG3, sizeof(MSG3) - 1) != sizeof(MSG3) - 1)
! 149: exit(0);
! 150: }
! 151:
! 152: #define MSG4 "\07\07Time to leave!\n"
! 153: for (bother = 10; bother--;) {
! 154: sleep((u_int)ONEMIN);
! 155: if (write(1, MSG4, sizeof(MSG4) - 1) != sizeof(MSG4) - 1)
! 156: exit(0);
! 157: }
! 158:
! 159: #define MSG5 "\07\07That was the last time I'll tell you. Bye.\n"
! 160: (void)write(1, MSG5, sizeof(MSG5) - 1);
! 161: exit(0);
! 162: }
! 163:
! 164: usage()
! 165: {
! 166: fprintf(stderr, "usage: leave [[+]hhmm]\n");
! 167: exit(1);
! 168: }
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