Annotation of src/usr.bin/leave/leave.c, Revision 1.20
1.20 ! tedu 1: /* $OpenBSD: leave.c,v 1.19 2018/02/10 00:00:47 tb 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>
1.20 ! tedu 38: #include <string.h>
1.3 deraadt 39: #include <unistd.h>
1.1 deraadt 40:
1.11 otto 41: static __dead void usage(void);
42: static void doalarm(u_int secs);
43:
44: #define SECOND 1
45: #define MINUTE (SECOND * 60)
46: #define FIVEMIN (5 * MINUTE)
47: #define HOUR (MINUTE * 60)
1.3 deraadt 48:
1.1 deraadt 49: /*
50: * leave [[+]hhmm]
51: *
52: * Reminds you when you have to leave.
53: * Leave prompts for input and goes away if you hit return.
54: * It nags you like a mother hen.
55: */
1.3 deraadt 56: int
1.10 deraadt 57: main(int argc, char *argv[])
1.1 deraadt 58: {
1.6 mpech 59: u_int secs;
60: int hours, minutes;
61: char c, *cp;
1.3 deraadt 62: struct tm *t;
63: time_t now;
1.11 otto 64: int plusnow = 0, twentyfour;
1.1 deraadt 65: char buf[50];
1.16 deraadt 66:
1.17 deraadt 67: if (pledge("stdio proc", NULL) == -1)
68: err(1, "pledge");
1.16 deraadt 69:
1.14 millert 70: if (setvbuf(stdout, NULL, _IOLBF, 0) != 0)
1.11 otto 71: errx(1, "Cannot set stdout to line buffered.");
1.1 deraadt 72:
73: if (argc < 2) {
1.11 otto 74: (void)fputs("When do you have to leave? ", stdout);
1.1 deraadt 75: cp = fgets(buf, sizeof(buf), stdin);
76: if (cp == NULL || *cp == '\n')
1.19 tb 77: return 0;
1.5 pjanzen 78: } else if (argc > 2)
79: usage();
80: else
1.1 deraadt 81: cp = argv[1];
82:
83: if (*cp == '+') {
84: plusnow = 1;
85: ++cp;
86: }
1.20 ! tedu 87:
! 88: if (!plusnow && strlen(cp) != 4)
! 89: usage();
1.1 deraadt 90:
91: for (hours = 0; (c = *cp) && c != '\n'; ++cp) {
1.13 deraadt 92: if (!isdigit((unsigned char)c))
1.1 deraadt 93: usage();
94: hours = hours * 10 + (c - '0');
95: }
96: minutes = hours % 100;
97: hours /= 100;
1.11 otto 98: /* determine 24 hours mode */
99: twentyfour = hours > 12;
1.1 deraadt 100:
101: if (minutes < 0 || minutes > 59)
102: usage();
103: if (plusnow)
1.11 otto 104: secs = (hours * HOUR) + (minutes * MINUTE);
1.1 deraadt 105: else {
1.3 deraadt 106: if (hours > 23)
1.1 deraadt 107: usage();
1.11 otto 108: (void)time(&now);
109: t = localtime(&now);
110: while (t->tm_hour > hours ||
1.4 espie 111: (t->tm_hour == hours && t->tm_min >= minutes)) {
1.11 otto 112: if (twentyfour)
1.4 espie 113: hours += 24;
114: else
115: hours += 12;
116: }
117:
1.11 otto 118: secs = (hours - t->tm_hour) * HOUR;
119: secs += (minutes - t->tm_min) * MINUTE;
1.18 cheloha 120: secs -= t->tm_sec; /* aim for beginning of minute */
1.1 deraadt 121: }
122: doalarm(secs);
1.19 tb 123: return 0;
1.1 deraadt 124: }
125:
1.11 otto 126: static void
1.10 deraadt 127: doalarm(u_int secs)
1.1 deraadt 128: {
1.6 mpech 129: int bother;
1.3 deraadt 130: time_t daytime;
1.8 mpech 131: pid_t pid;
1.1 deraadt 132:
1.11 otto 133: switch (pid = fork()) {
134: case 0:
135: break;
136: case -1:
137: err(1, "Fork failed");
138: /* NOTREACHED */
139: default:
1.1 deraadt 140: (void)time(&daytime);
141: daytime += secs;
1.8 mpech 142: printf("Alarm set for %.16s. (pid %ld)\n",
143: ctime(&daytime), (long)pid);
1.1 deraadt 144: exit(0);
145: }
1.11 otto 146: sleep(2); /* let parent print set message */
1.1 deraadt 147:
148: /*
149: * if write fails, we've lost the terminal through someone else
150: * causing a vhangup by logging in.
151: */
152: if (secs >= FIVEMIN) {
153: sleep(secs - FIVEMIN);
1.11 otto 154: if (puts("\a\aYou have to leave in 5 minutes.") == EOF)
1.1 deraadt 155: exit(0);
156: secs = FIVEMIN;
157: }
158:
1.11 otto 159: if (secs >= MINUTE) {
160: sleep(secs - MINUTE);
161: if (puts("\a\aJust one more minute!") == EOF)
1.1 deraadt 162: exit(0);
1.18 cheloha 163: secs = MINUTE;
1.1 deraadt 164: }
165:
1.18 cheloha 166: sleep(secs);
167:
1.1 deraadt 168: for (bother = 10; bother--;) {
1.11 otto 169: if (puts("\a\aTime to leave!") == EOF)
1.1 deraadt 170: exit(0);
1.18 cheloha 171: if (bother)
172: sleep(MINUTE);
1.1 deraadt 173: }
174:
1.11 otto 175: puts("\a\aThat was the last time I'll tell you. Bye.");
1.1 deraadt 176: exit(0);
177: }
178:
1.11 otto 179: static __dead void
1.10 deraadt 180: usage(void)
1.1 deraadt 181: {
182: fprintf(stderr, "usage: leave [[+]hhmm]\n");
183: exit(1);
184: }
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