Annotation of src/usr.bin/leave/leave.c, Revision 1.2
1.2 ! deraadt 1: /* $OpenBSD: leave.c,v 1.4 1995/07/03 16:50:13 phil 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
1.2 ! deraadt 47: static char rcsid[] = "$OpenBSD: leave.c,v 1.4 1995/07/03 16:50:13 phil Exp $";
1.1 deraadt 48: #endif /* not lint */
49:
50: #include <sys/param.h>
51: #include <sys/time.h>
52: #include <stdio.h>
53: #include <ctype.h>
54:
55: /*
56: * leave [[+]hhmm]
57: *
58: * Reminds you when you have to leave.
59: * Leave prompts for input and goes away if you hit return.
60: * It nags you like a mother hen.
61: */
62: main(argc, argv)
63: int argc;
64: char **argv;
65: {
66: register u_int secs;
67: register int hours, minutes;
68: register char c, *cp;
69: struct tm *t, *localtime();
70: time_t now, time();
71: int plusnow;
72: char buf[50];
73:
74: if (argc < 2) {
75: #define MSG1 "When do you have to leave? "
76: (void)write(1, MSG1, sizeof(MSG1) - 1);
77: cp = fgets(buf, sizeof(buf), stdin);
78: if (cp == NULL || *cp == '\n')
79: exit(0);
80: } else
81: cp = argv[1];
82:
83: if (*cp == '+') {
84: plusnow = 1;
85: ++cp;
86: } else {
87: plusnow = 0;
88: (void)time(&now);
89: t = localtime(&now);
90: }
91:
92: for (hours = 0; (c = *cp) && c != '\n'; ++cp) {
93: if (!isdigit(c))
94: usage();
95: hours = hours * 10 + (c - '0');
96: }
97: minutes = hours % 100;
98: hours /= 100;
99:
100: if (minutes < 0 || minutes > 59)
101: usage();
102: if (plusnow)
103: secs = hours * 60 * 60 + minutes * 60;
104: else {
105: if (hours > 23 || t->tm_hour > hours ||
106: t->tm_hour == hours && minutes <= t->tm_min)
107: usage();
108: secs = (hours - t->tm_hour) * 60 * 60;
109: secs += (minutes - t->tm_min) * 60;
110: }
111: doalarm(secs);
112: exit(0);
113: }
114:
115: doalarm(secs)
116: u_int secs;
117: {
118: register int bother;
119: time_t daytime, time();
120: int pid;
121: char *ctime();
122:
123: if (pid = fork()) {
124: (void)time(&daytime);
125: daytime += secs;
126: printf("Alarm set for %.16s. (pid %d)\n",
127: ctime(&daytime), pid);
128: exit(0);
129: }
130: sleep((u_int)2); /* let parent print set message */
131:
132: /*
133: * if write fails, we've lost the terminal through someone else
134: * causing a vhangup by logging in.
135: */
136: #define FIVEMIN (5 * 60)
137: #define MSG2 "\07\07You have to leave in 5 minutes.\n"
138: if (secs >= FIVEMIN) {
139: sleep(secs - FIVEMIN);
140: if (write(1, MSG2, sizeof(MSG2) - 1) != sizeof(MSG2) - 1)
141: exit(0);
142: secs = FIVEMIN;
143: }
144:
145: #define ONEMIN (60)
146: #define MSG3 "\07\07Just one more minute!\n"
147: if (secs >= ONEMIN) {
148: sleep(secs - ONEMIN);
149: if (write(1, MSG3, sizeof(MSG3) - 1) != sizeof(MSG3) - 1)
150: exit(0);
151: }
152:
153: #define MSG4 "\07\07Time to leave!\n"
154: for (bother = 10; bother--;) {
155: sleep((u_int)ONEMIN);
156: if (write(1, MSG4, sizeof(MSG4) - 1) != sizeof(MSG4) - 1)
157: exit(0);
158: }
159:
160: #define MSG5 "\07\07That was the last time I'll tell you. Bye.\n"
161: (void)write(1, MSG5, sizeof(MSG5) - 1);
162: exit(0);
163: }
164:
165: usage()
166: {
167: fprintf(stderr, "usage: leave [[+]hhmm]\n");
168: exit(1);
169: }
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