1 /*-
2 * Copyright (c) 1989, 1993, 1994
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 4. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30 #ifndef lint
31 static const char copyright[] =
32 "@(#) Copyright (c) 1989, 1993\n\
33 The Regents of the University of California. All rights reserved.\n";
34 #endif
35
36 #if 0
37 #ifndef lint
38 static char sccsid[] = "@(#)calendar.c 8.3 (Berkeley) 3/25/94";
39 #endif
40 #endif
41
42 #include <sys/cdefs.h>
43 __FBSDID("$FreeBSD$");
44
45 #include <err.h>
46 #include <errno.h>
47 #include <locale.h>
48 #include <pwd.h>
49 #include <stdio.h>
50 #include <stdlib.h>
51 #include <string.h>
52 #include <time.h>
53 #include <unistd.h>
54
55 #include "calendar.h"
56
57 #define UTCOFFSET_NOTSET 100 /* Expected between -24 and +24 */
58 #define LONGITUDE_NOTSET 1000 /* Expected between -360 and +360 */
59
60 struct passwd *pw;
61 int doall = 0;
62 int debug = 0;
63 static char *DEBUG = NULL;
64 static time_t f_time = 0;
65 double UTCOffset = UTCOFFSET_NOTSET;
66 int EastLongitude = LONGITUDE_NOTSET;
67
68 static void usage(void) __dead2;
69
70 int
main(int argc,char * argv[])71 main(int argc, char *argv[])
72 {
73 int f_dayAfter = 0; /* days after current date */
74 int f_dayBefore = 0; /* days before current date */
75 int Friday = 5; /* day before weekend */
76
77 int ch;
78 struct tm tp1, tp2;
79
80 (void)setlocale(LC_ALL, "");
81
82 while ((ch = getopt(argc, argv, "-A:aB:D:dF:f:l:t:U:W:?")) != -1)
83 switch (ch) {
84 case '-': /* backward contemptible */
85 case 'a':
86 if (getuid()) {
87 errno = EPERM;
88 err(1, NULL);
89 }
90 doall = 1;
91 break;
92
93 case 'W': /* we don't need no steenking Fridays */
94 Friday = -1;
95 /* FALLTHROUGH */
96
97 case 'A': /* days after current date */
98 f_dayAfter = atoi(optarg);
99 if (f_dayAfter < 0)
100 errx(1, "number of days must be positive");
101 break;
102
103 case 'B': /* days before current date */
104 f_dayBefore = atoi(optarg);
105 if (f_dayBefore < 0)
106 errx(1, "number of days must be positive");
107 break;
108
109 case 'D': /* debug output of sun and moon info */
110 DEBUG = optarg;
111 break;
112
113 case 'd': /* debug output of current date */
114 debug = 1;
115 break;
116
117 case 'F': /* Change the time: When does weekend start? */
118 Friday = atoi(optarg);
119 break;
120
121 case 'f': /* other calendar file */
122 calendarFile = optarg;
123 break;
124
125 case 'l': /* Change longitudal position */
126 EastLongitude = strtol(optarg, NULL, 10);
127 break;
128
129 case 't': /* other date, for tests */
130 f_time = Mktime(optarg);
131 break;
132
133 case 'U': /* Change UTC offset */
134 UTCOffset = strtod(optarg, NULL);
135 break;
136
137 case '?':
138 default:
139 usage();
140 }
141
142 argc -= optind;
143 argv += optind;
144
145 if (argc)
146 usage();
147
148 /* use current time */
149 if (f_time <= 0)
150 (void)time(&f_time);
151
152 /* if not set, determine where I could be */
153 {
154 if (UTCOffset == UTCOFFSET_NOTSET &&
155 EastLongitude == LONGITUDE_NOTSET) {
156 /* Calculate on difference between here and UTC */
157 time_t t;
158 struct tm tm;
159 long utcoffset, hh, mm, ss;
160 double uo;
161
162 time(&t);
163 localtime_r(&t, &tm);
164 utcoffset = tm.tm_gmtoff;
165 /* seconds -> hh:mm:ss */
166 hh = utcoffset / SECSPERHOUR;
167 utcoffset %= SECSPERHOUR;
168 mm = utcoffset / SECSPERMINUTE;
169 utcoffset %= SECSPERMINUTE;
170 ss = utcoffset;
171
172 /* hh:mm:ss -> hh.mmss */
173 uo = mm + (100.0 * (ss / 60.0));
174 uo /= 60.0 / 100.0;
175 uo = hh + uo / 100;
176
177 UTCOffset = uo;
178 EastLongitude = UTCOffset * 15;
179 } else if (UTCOffset == UTCOFFSET_NOTSET) {
180 /* Base on information given */
181 UTCOffset = EastLongitude / 15;
182 } else if (EastLongitude == LONGITUDE_NOTSET) {
183 /* Base on information given */
184 EastLongitude = UTCOffset * 15;
185 }
186 }
187
188 settimes(f_time, f_dayBefore, f_dayAfter, Friday, &tp1, &tp2);
189 generatedates(&tp1, &tp2);
190
191 /*
192 * FROM now on, we are working in UTC.
193 * This will only affect moon and sun related events anyway.
194 */
195 if (setenv("TZ", "UTC", 1) != 0)
196 errx(1, "setenv: %s", strerror(errno));
197 tzset();
198
199 if (debug)
200 dumpdates();
201
202 if (DEBUG != NULL) {
203 dodebug(DEBUG);
204 exit(0);
205 }
206
207 if (doall)
208 while ((pw = getpwent()) != NULL) {
209 (void)setegid(pw->pw_gid);
210 (void)initgroups(pw->pw_name, pw->pw_gid);
211 (void)seteuid(pw->pw_uid);
212 if (!chdir(pw->pw_dir))
213 cal();
214 (void)seteuid(0);
215 }
216 else
217 cal();
218 exit(0);
219 }
220
221
222 static void __dead2
usage(void)223 usage(void)
224 {
225
226 fprintf(stderr, "%s\n%s\n%s\n",
227 "usage: calendar [-A days] [-a] [-B days] [-D sun|moon] [-d]",
228 " [-F friday] [-f calendarfile] [-l longitude]",
229 " [-t dd[.mm[.year]]] [-U utcoffset] [-W days]"
230 );
231 exit(1);
232 }
233