Annotation of src/usr.bin/leave/leave.c, Revision 1.11
1.11 ! otto 1: /* $OpenBSD: leave.c,v 1.10 2003/06/10 22:20:47 deraadt Exp $ */
1.1 deraadt 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.
1.9 millert 16: * 3. Neither the name of the University nor the names of its contributors
1.1 deraadt 17: * may be used to endorse or promote products derived from this software
18: * without specific prior written permission.
19: *
20: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30: * SUCH DAMAGE.
31: */
32:
33: #ifndef lint
1.11 ! otto 34: static const char copyright[] =
1.1 deraadt 35: "@(#) Copyright (c) 1980, 1988, 1993\n\
36: The Regents of the University of California. All rights reserved.\n";
37: #endif /* not lint */
38:
39: #ifndef lint
40: #if 0
41: static char sccsid[] = "@(#)leave.c 8.1 (Berkeley) 6/6/93";
42: #endif
1.11 ! otto 43: static const char rcsid[] = "$OpenBSD: leave.c,v 1.10 2003/06/10 22:20:47 deraadt Exp $";
1.1 deraadt 44: #endif /* not lint */
45:
46: #include <sys/param.h>
47: #include <sys/time.h>
1.11 ! otto 48: #include <ctype.h>
! 49: #include <err.h>
! 50: #include <stdio.h>
! 51: #include <stdlib.h>
1.3 deraadt 52: #include <unistd.h>
1.1 deraadt 53:
1.11 ! otto 54: static __dead void usage(void);
! 55: static void doalarm(u_int secs);
! 56:
! 57: #define SECOND 1
! 58: #define MINUTE (SECOND * 60)
! 59: #define FIVEMIN (5 * MINUTE)
! 60: #define HOUR (MINUTE * 60)
1.3 deraadt 61:
1.1 deraadt 62: /*
63: * leave [[+]hhmm]
64: *
65: * Reminds you when you have to leave.
66: * Leave prompts for input and goes away if you hit return.
67: * It nags you like a mother hen.
68: */
1.3 deraadt 69: int
1.10 deraadt 70: main(int argc, char *argv[])
1.1 deraadt 71: {
1.6 mpech 72: u_int secs;
73: int hours, minutes;
74: char c, *cp;
1.3 deraadt 75: struct tm *t;
76: time_t now;
1.11 ! otto 77: int plusnow = 0, twentyfour;
1.1 deraadt 78: char buf[50];
1.11 ! otto 79:
! 80: if (setlinebuf(stdout) != 0)
! 81: errx(1, "Cannot set stdout to line buffered.");
1.1 deraadt 82:
83: if (argc < 2) {
1.11 ! otto 84: (void)fputs("When do you have to leave? ", stdout);
1.1 deraadt 85: cp = fgets(buf, sizeof(buf), stdin);
86: if (cp == NULL || *cp == '\n')
87: exit(0);
1.5 pjanzen 88: } else if (argc > 2)
89: usage();
90: else
1.1 deraadt 91: cp = argv[1];
92:
93: if (*cp == '+') {
94: plusnow = 1;
95: ++cp;
96: }
97:
98: for (hours = 0; (c = *cp) && c != '\n'; ++cp) {
99: if (!isdigit(c))
100: usage();
101: hours = hours * 10 + (c - '0');
102: }
103: minutes = hours % 100;
104: hours /= 100;
1.11 ! otto 105: /* determine 24 hours mode */
! 106: twentyfour = hours > 12;
1.1 deraadt 107:
108: if (minutes < 0 || minutes > 59)
109: usage();
110: if (plusnow)
1.11 ! otto 111: secs = (hours * HOUR) + (minutes * MINUTE);
1.1 deraadt 112: else {
1.3 deraadt 113: if (hours > 23)
1.1 deraadt 114: usage();
1.11 ! otto 115: (void)time(&now);
! 116: t = localtime(&now);
! 117: while (t->tm_hour > hours ||
1.4 espie 118: (t->tm_hour == hours && t->tm_min >= minutes)) {
1.11 ! otto 119: if (twentyfour)
1.4 espie 120: hours += 24;
121: else
122: hours += 12;
123: }
124:
1.11 ! otto 125: secs = (hours - t->tm_hour) * HOUR;
! 126: secs += (minutes - t->tm_min) * MINUTE;
1.1 deraadt 127: }
128: doalarm(secs);
129: exit(0);
130: }
131:
1.11 ! otto 132: static void
1.10 deraadt 133: doalarm(u_int secs)
1.1 deraadt 134: {
1.6 mpech 135: int bother;
1.3 deraadt 136: time_t daytime;
1.8 mpech 137: pid_t pid;
1.1 deraadt 138:
1.11 ! otto 139: switch (pid = fork()) {
! 140: case 0:
! 141: break;
! 142: case -1:
! 143: err(1, "Fork failed");
! 144: /* NOTREACHED */
! 145: default:
1.1 deraadt 146: (void)time(&daytime);
147: daytime += secs;
1.8 mpech 148: printf("Alarm set for %.16s. (pid %ld)\n",
149: ctime(&daytime), (long)pid);
1.1 deraadt 150: exit(0);
151: }
1.11 ! otto 152: sleep(2); /* let parent print set message */
1.1 deraadt 153:
154: /*
155: * if write fails, we've lost the terminal through someone else
156: * causing a vhangup by logging in.
157: */
158: if (secs >= FIVEMIN) {
159: sleep(secs - FIVEMIN);
1.11 ! otto 160: if (puts("\a\aYou have to leave in 5 minutes.") == EOF)
1.1 deraadt 161: exit(0);
162: secs = FIVEMIN;
163: }
164:
1.11 ! otto 165: if (secs >= MINUTE) {
! 166: sleep(secs - MINUTE);
! 167: if (puts("\a\aJust one more minute!") == EOF)
1.1 deraadt 168: exit(0);
169: }
170:
171: for (bother = 10; bother--;) {
1.11 ! otto 172: sleep(MINUTE);
! 173: if (puts("\a\aTime to leave!") == EOF)
1.1 deraadt 174: exit(0);
175: }
176:
1.11 ! otto 177: puts("\a\aThat was the last time I'll tell you. Bye.");
1.1 deraadt 178: exit(0);
179: }
180:
1.11 ! otto 181: static __dead void
1.10 deraadt 182: usage(void)
1.1 deraadt 183: {
184: fprintf(stderr, "usage: leave [[+]hhmm]\n");
185: exit(1);
186: }
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