Annotation of src/usr.bin/leave/leave.c, Revision 1.15
1.15 ! deraadt 1: /* $OpenBSD: leave.c,v 1.14 2014/11/26 18:34:51 millert 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: #include <sys/time.h>
1.11 otto 34: #include <ctype.h>
35: #include <err.h>
36: #include <stdio.h>
37: #include <stdlib.h>
1.3 deraadt 38: #include <unistd.h>
1.1 deraadt 39:
1.11 otto 40: static __dead void usage(void);
41: static void doalarm(u_int secs);
42:
43: #define SECOND 1
44: #define MINUTE (SECOND * 60)
45: #define FIVEMIN (5 * MINUTE)
46: #define HOUR (MINUTE * 60)
1.3 deraadt 47:
1.1 deraadt 48: /*
49: * leave [[+]hhmm]
50: *
51: * Reminds you when you have to leave.
52: * Leave prompts for input and goes away if you hit return.
53: * It nags you like a mother hen.
54: */
1.3 deraadt 55: int
1.10 deraadt 56: main(int argc, char *argv[])
1.1 deraadt 57: {
1.6 mpech 58: u_int secs;
59: int hours, minutes;
60: char c, *cp;
1.3 deraadt 61: struct tm *t;
62: time_t now;
1.11 otto 63: int plusnow = 0, twentyfour;
1.1 deraadt 64: char buf[50];
1.11 otto 65:
1.14 millert 66: if (setvbuf(stdout, NULL, _IOLBF, 0) != 0)
1.11 otto 67: errx(1, "Cannot set stdout to line buffered.");
1.1 deraadt 68:
69: if (argc < 2) {
1.11 otto 70: (void)fputs("When do you have to leave? ", stdout);
1.1 deraadt 71: cp = fgets(buf, sizeof(buf), stdin);
72: if (cp == NULL || *cp == '\n')
73: exit(0);
1.5 pjanzen 74: } else if (argc > 2)
75: usage();
76: else
1.1 deraadt 77: cp = argv[1];
78:
79: if (*cp == '+') {
80: plusnow = 1;
81: ++cp;
82: }
83:
84: for (hours = 0; (c = *cp) && c != '\n'; ++cp) {
1.13 deraadt 85: if (!isdigit((unsigned char)c))
1.1 deraadt 86: usage();
87: hours = hours * 10 + (c - '0');
88: }
89: minutes = hours % 100;
90: hours /= 100;
1.11 otto 91: /* determine 24 hours mode */
92: twentyfour = hours > 12;
1.1 deraadt 93:
94: if (minutes < 0 || minutes > 59)
95: usage();
96: if (plusnow)
1.11 otto 97: secs = (hours * HOUR) + (minutes * MINUTE);
1.1 deraadt 98: else {
1.3 deraadt 99: if (hours > 23)
1.1 deraadt 100: usage();
1.11 otto 101: (void)time(&now);
102: t = localtime(&now);
103: while (t->tm_hour > hours ||
1.4 espie 104: (t->tm_hour == hours && t->tm_min >= minutes)) {
1.11 otto 105: if (twentyfour)
1.4 espie 106: hours += 24;
107: else
108: hours += 12;
109: }
110:
1.11 otto 111: secs = (hours - t->tm_hour) * HOUR;
112: secs += (minutes - t->tm_min) * MINUTE;
1.1 deraadt 113: }
114: doalarm(secs);
115: exit(0);
116: }
117:
1.11 otto 118: static void
1.10 deraadt 119: doalarm(u_int secs)
1.1 deraadt 120: {
1.6 mpech 121: int bother;
1.3 deraadt 122: time_t daytime;
1.8 mpech 123: pid_t pid;
1.1 deraadt 124:
1.11 otto 125: switch (pid = fork()) {
126: case 0:
127: break;
128: case -1:
129: err(1, "Fork failed");
130: /* NOTREACHED */
131: default:
1.1 deraadt 132: (void)time(&daytime);
133: daytime += secs;
1.8 mpech 134: printf("Alarm set for %.16s. (pid %ld)\n",
135: ctime(&daytime), (long)pid);
1.1 deraadt 136: exit(0);
137: }
1.11 otto 138: sleep(2); /* let parent print set message */
1.1 deraadt 139:
140: /*
141: * if write fails, we've lost the terminal through someone else
142: * causing a vhangup by logging in.
143: */
144: if (secs >= FIVEMIN) {
145: sleep(secs - FIVEMIN);
1.11 otto 146: if (puts("\a\aYou have to leave in 5 minutes.") == EOF)
1.1 deraadt 147: exit(0);
148: secs = FIVEMIN;
149: }
150:
1.11 otto 151: if (secs >= MINUTE) {
152: sleep(secs - MINUTE);
153: if (puts("\a\aJust one more minute!") == EOF)
1.1 deraadt 154: exit(0);
155: }
156:
157: for (bother = 10; bother--;) {
1.11 otto 158: sleep(MINUTE);
159: if (puts("\a\aTime to leave!") == EOF)
1.1 deraadt 160: exit(0);
161: }
162:
1.11 otto 163: puts("\a\aThat was the last time I'll tell you. Bye.");
1.1 deraadt 164: exit(0);
165: }
166:
1.11 otto 167: static __dead void
1.10 deraadt 168: usage(void)
1.1 deraadt 169: {
170: fprintf(stderr, "usage: leave [[+]hhmm]\n");
171: exit(1);
172: }
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