Annotation of src/usr.bin/leave/leave.c, Revision 1.7
1.7 ! millert 1: /* $OpenBSD: leave.c,v 1.6 2001/11/19 19:02:14 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.
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
1.7 ! millert 47: static char rcsid[] = "$OpenBSD: leave.c,v 1.6 2001/11/19 19:02:14 mpech Exp $";
1.1 deraadt 48: #endif /* not lint */
49:
50: #include <sys/param.h>
51: #include <sys/time.h>
1.3 deraadt 52: #include <unistd.h>
53: #include <stdlib.h>
1.1 deraadt 54: #include <stdio.h>
55: #include <ctype.h>
56:
1.7 ! millert 57: void usage(void);
! 58: void doalarm(u_int secs);
1.3 deraadt 59:
1.1 deraadt 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: */
1.3 deraadt 67: int
1.1 deraadt 68: main(argc, argv)
69: int argc;
70: char **argv;
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;
1.1 deraadt 77: int plusnow;
78: char buf[50];
79:
80: if (argc < 2) {
81: #define MSG1 "When do you have to leave? "
1.3 deraadt 82: (void)write(STDOUT_FILENO, MSG1, sizeof(MSG1) - 1);
1.1 deraadt 83: cp = fgets(buf, sizeof(buf), stdin);
84: if (cp == NULL || *cp == '\n')
85: exit(0);
1.5 pjanzen 86: } else if (argc > 2)
87: usage();
88: else
1.1 deraadt 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 {
1.3 deraadt 113: if (hours > 23)
1.1 deraadt 114: usage();
1.4 espie 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:
1.1 deraadt 124: secs = (hours - t->tm_hour) * 60 * 60;
125: secs += (minutes - t->tm_min) * 60;
126: }
127: doalarm(secs);
128: exit(0);
129: }
130:
1.3 deraadt 131: void
1.1 deraadt 132: doalarm(secs)
133: u_int secs;
134: {
1.6 mpech 135: int bother;
1.3 deraadt 136: time_t daytime;
1.1 deraadt 137: int pid;
138:
1.3 deraadt 139: if ((pid = fork())) {
1.1 deraadt 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);
1.3 deraadt 156: if (write(STDOUT_FILENO, MSG2, sizeof(MSG2) - 1) != sizeof(MSG2) - 1)
1.1 deraadt 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);
1.3 deraadt 165: if (write(STDOUT_FILENO, MSG3, sizeof(MSG3) - 1) != sizeof(MSG3) - 1)
1.1 deraadt 166: exit(0);
167: }
168:
169: #define MSG4 "\07\07Time to leave!\n"
170: for (bother = 10; bother--;) {
171: sleep((u_int)ONEMIN);
1.3 deraadt 172: if (write(STDOUT_FILENO, MSG4, sizeof(MSG4) - 1) != sizeof(MSG4) - 1)
1.1 deraadt 173: exit(0);
174: }
175:
176: #define MSG5 "\07\07That was the last time I'll tell you. Bye.\n"
1.3 deraadt 177: (void)write(STDOUT_FILENO, MSG5, sizeof(MSG5) - 1);
1.1 deraadt 178: exit(0);
179: }
180:
1.3 deraadt 181: void
1.1 deraadt 182: usage()
183: {
184: fprintf(stderr, "usage: leave [[+]hhmm]\n");
185: exit(1);
186: }
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