Annotation of src/usr.bin/leave/leave.c, Revision 1.9
1.9 ! millert 1: /* $OpenBSD: leave.c,v 1.8 2002/06/12 06:07:15 mpech 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
34: static char copyright[] =
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
1.9 ! millert 43: static char rcsid[] = "$OpenBSD: leave.c,v 1.8 2002/06/12 06:07:15 mpech Exp $";
1.1 deraadt 44: #endif /* not lint */
45:
46: #include <sys/param.h>
47: #include <sys/time.h>
1.3 deraadt 48: #include <unistd.h>
49: #include <stdlib.h>
1.1 deraadt 50: #include <stdio.h>
51: #include <ctype.h>
52:
1.7 millert 53: void usage(void);
54: void doalarm(u_int secs);
1.3 deraadt 55:
1.1 deraadt 56: /*
57: * leave [[+]hhmm]
58: *
59: * Reminds you when you have to leave.
60: * Leave prompts for input and goes away if you hit return.
61: * It nags you like a mother hen.
62: */
1.3 deraadt 63: int
1.1 deraadt 64: main(argc, argv)
65: int argc;
66: char **argv;
67: {
1.6 mpech 68: u_int secs;
69: int hours, minutes;
70: char c, *cp;
1.3 deraadt 71: struct tm *t;
72: time_t now;
1.1 deraadt 73: int plusnow;
74: char buf[50];
75:
76: if (argc < 2) {
77: #define MSG1 "When do you have to leave? "
1.3 deraadt 78: (void)write(STDOUT_FILENO, MSG1, sizeof(MSG1) - 1);
1.1 deraadt 79: cp = fgets(buf, sizeof(buf), stdin);
80: if (cp == NULL || *cp == '\n')
81: exit(0);
1.5 pjanzen 82: } else if (argc > 2)
83: usage();
84: else
1.1 deraadt 85: cp = argv[1];
86:
87: if (*cp == '+') {
88: plusnow = 1;
89: ++cp;
90: } else {
91: plusnow = 0;
92: (void)time(&now);
93: t = localtime(&now);
94: }
95:
96: for (hours = 0; (c = *cp) && c != '\n'; ++cp) {
97: if (!isdigit(c))
98: usage();
99: hours = hours * 10 + (c - '0');
100: }
101: minutes = hours % 100;
102: hours /= 100;
103:
104: if (minutes < 0 || minutes > 59)
105: usage();
106: if (plusnow)
107: secs = hours * 60 * 60 + minutes * 60;
108: else {
1.3 deraadt 109: if (hours > 23)
1.1 deraadt 110: usage();
1.4 espie 111: if (t->tm_hour > hours ||
112: (t->tm_hour == hours && t->tm_min >= minutes)) {
113: /* determine 24 hours mode */
114: if (hours >= 13)
115: hours += 24;
116: else
117: hours += 12;
118: }
119:
1.1 deraadt 120: secs = (hours - t->tm_hour) * 60 * 60;
121: secs += (minutes - t->tm_min) * 60;
122: }
123: doalarm(secs);
124: exit(0);
125: }
126:
1.3 deraadt 127: void
1.1 deraadt 128: doalarm(secs)
129: u_int secs;
130: {
1.6 mpech 131: int bother;
1.3 deraadt 132: time_t daytime;
1.8 mpech 133: pid_t pid;
1.1 deraadt 134:
1.3 deraadt 135: if ((pid = fork())) {
1.1 deraadt 136: (void)time(&daytime);
137: daytime += secs;
1.8 mpech 138: printf("Alarm set for %.16s. (pid %ld)\n",
139: ctime(&daytime), (long)pid);
1.1 deraadt 140: exit(0);
141: }
142: sleep((u_int)2); /* let parent print set message */
143:
144: /*
145: * if write fails, we've lost the terminal through someone else
146: * causing a vhangup by logging in.
147: */
148: #define FIVEMIN (5 * 60)
149: #define MSG2 "\07\07You have to leave in 5 minutes.\n"
150: if (secs >= FIVEMIN) {
151: sleep(secs - FIVEMIN);
1.3 deraadt 152: if (write(STDOUT_FILENO, MSG2, sizeof(MSG2) - 1) != sizeof(MSG2) - 1)
1.1 deraadt 153: exit(0);
154: secs = FIVEMIN;
155: }
156:
157: #define ONEMIN (60)
158: #define MSG3 "\07\07Just one more minute!\n"
159: if (secs >= ONEMIN) {
160: sleep(secs - ONEMIN);
1.3 deraadt 161: if (write(STDOUT_FILENO, MSG3, sizeof(MSG3) - 1) != sizeof(MSG3) - 1)
1.1 deraadt 162: exit(0);
163: }
164:
165: #define MSG4 "\07\07Time to leave!\n"
166: for (bother = 10; bother--;) {
167: sleep((u_int)ONEMIN);
1.3 deraadt 168: if (write(STDOUT_FILENO, MSG4, sizeof(MSG4) - 1) != sizeof(MSG4) - 1)
1.1 deraadt 169: exit(0);
170: }
171:
172: #define MSG5 "\07\07That was the last time I'll tell you. Bye.\n"
1.3 deraadt 173: (void)write(STDOUT_FILENO, MSG5, sizeof(MSG5) - 1);
1.1 deraadt 174: exit(0);
175: }
176:
1.3 deraadt 177: void
1.1 deraadt 178: usage()
179: {
180: fprintf(stderr, "usage: leave [[+]hhmm]\n");
181: exit(1);
182: }