calendar.c revision 181323 
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 * 3. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *	This product includes software developed by the University of
16 *	California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#ifndef lint
35static const char copyright[] =
36"@(#) Copyright (c) 1989, 1993\n\
37	The Regents of the University of California.  All rights reserved.\n";
38#endif
39
40#if 0
41#ifndef lint
42static char sccsid[] = "@(#)calendar.c  8.3 (Berkeley) 3/25/94";
43#endif
44#endif
45
46#include <sys/cdefs.h>
47__FBSDID("$FreeBSD: head/usr.bin/calendar/calendar.c 181323 2008-08-05 08:16:37Z edwin $");
48
49#include <err.h>
50#include <errno.h>
51#include <locale.h>
52#include <pwd.h>
53#include <stdio.h>
54#include <stdlib.h>
55#include <time.h>
56#include <unistd.h>
57
58#include "pathnames.h"
59#include "calendar.h"
60
61struct passwd	*pw;
62int		doall = 0;
63time_t		f_time = 0;
64
65int	f_dayAfter = 0;		/* days after current date */
66int	f_dayBefore = 0;	/* days before current date */
67int	Friday = 5;		/* day before weekend */
68
69static void	usage(void) __dead2;
70
71int
72main(int argc, char *argv[])
73{
74	int ch;
75
76	(void)setlocale(LC_ALL, "");
77
78	while ((ch = getopt(argc, argv, "-A:aB:F:f:t:W:")) != -1)
79		switch (ch) {
80		case '-':		/* backward contemptible */
81		case 'a':
82			if (getuid()) {
83				errno = EPERM;
84				err(1, NULL);
85			}
86			doall = 1;
87			break;
88
89		case 'f': /* other calendar file */
90			calendarFile = optarg;
91			break;
92
93		case 't': /* other date, undocumented, for tests */
94			f_time = Mktime(optarg);
95			break;
96
97		case 'W': /* we don't need no steenking Fridays */
98			Friday = -1;
99
100			/* FALLTHROUGH */
101		case 'A': /* days after current date */
102			f_dayAfter = atoi(optarg);
103			break;
104
105		case 'B': /* days before current date */
106			f_dayBefore = atoi(optarg);
107			break;
108
109		case 'F':
110			Friday = atoi(optarg);
111			break;
112
113		case '?':
114		default:
115			usage();
116		}
117
118	argc -= optind;
119	argv += optind;
120
121	if (argc)
122		usage();
123
124	/* use current time */
125	if (f_time <= 0)
126		(void)time(&f_time);
127
128	settime(f_time);
129
130	if (doall)
131		while ((pw = getpwent()) != NULL) {
132			(void)setegid(pw->pw_gid);
133			(void)initgroups(pw->pw_name, pw->pw_gid);
134			(void)seteuid(pw->pw_uid);
135			if (!chdir(pw->pw_dir))
136				cal();
137			(void)seteuid(0);
138		}
139	else
140		cal();
141	exit(0);
142}
143
144
145static void __dead2
146usage(void)
147{
148
149	fprintf(stderr, "%s\n%s\n",
150	    "usage: calendar [-a] [-A days] [-B days] [-F friday] "
151	    "[-f calendarfile]",
152	    "                [-t dd[.mm[.year]]] [-W days]");
153	exit(1);
154}
155