calendar.c revision 98181 
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 98181 2002-06-13 21:20:56Z grog $");
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
69int
70main(argc, argv)
71	int argc;
72	char *argv[];
73{
74	int ch;
75
76	(void) setlocale(LC_ALL, "");
77
78	while ((ch = getopt(argc, argv, "-af:t:A:B:F: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
90		case 'f': /* other calendar file */
91		        calendarFile = optarg;
92			break;
93
94		case 't': /* other date, undocumented, for tests */
95			f_time = Mktime (optarg);
96			break;
97
98		case 'W': /* we don't need no steenking Fridays */
99			Friday = -1;
100
101			/* FALLTHROUGH */
102		case 'A': /* days after current date */
103			f_dayAfter = atoi(optarg);
104			break;
105
106		case 'B': /* days before current date */
107			f_dayBefore = atoi(optarg);
108			break;
109
110		case 'F':
111			Friday = atoi(optarg);
112			break;
113
114		case '?':
115		default:
116			usage();
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
145void
146usage()
147{
148	(void)fprintf(stderr,
149		      "usage: calendar [-a] [-A days] [-W days] [-F friday] [-B days]\n"
150		      "\t[-f calendarfile] [-t dd[.mm[.year]]]\n");
151	exit(1);
152}
153
154
155