calendar.c revision 73256 
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 * $FreeBSD: head/usr.bin/calendar/calendar.c 73256 2001-03-01 05:46:03Z imp $
34 */
35
36#ifndef lint
37static const char copyright[] =
38"@(#) Copyright (c) 1989, 1993\n\
39	The Regents of the University of California.  All rights reserved.\n";
40#endif /* not lint */
41
42#ifndef lint
43static const char sccsid[] = "@(#)calendar.c  8.3 (Berkeley) 3/25/94";
44#endif /* not lint */
45
46#include <err.h>
47#include <errno.h>
48#include <locale.h>
49#include <pwd.h>
50#include <stdio.h>
51#include <stdlib.h>
52#include <time.h>
53#include <unistd.h>
54
55#include "pathnames.h"
56#include "calendar.h"
57
58struct passwd *pw;
59int doall = 0;
60time_t f_time = 0;
61
62int f_dayAfter = 0; /* days after current date */
63int f_dayBefore = 0; /* days before current date */
64
65int
66main(argc, argv)
67	int argc;
68	char *argv[];
69{
70	int ch;
71
72	(void) setlocale(LC_ALL, "");
73
74	while ((ch = getopt(argc, argv, "-af:t:A:B:")) != -1)
75		switch (ch) {
76		case '-':		/* backward contemptible */
77		case 'a':
78			if (getuid()) {
79				errno = EPERM;
80				err(1, NULL);
81			}
82			doall = 1;
83			break;
84
85
86		case 'f': /* other calendar file */
87		        calendarFile = optarg;
88			break;
89
90		case 't': /* other date, undocumented, for tests */
91			f_time = Mktime (optarg);
92			break;
93
94		case 'A': /* days after current date */
95			f_dayAfter = atoi(optarg);
96			break;
97
98		case 'B': /* days before current date */
99			f_dayBefore = atoi(optarg);
100			break;
101
102		case '?':
103		default:
104			usage();
105		}
106	argc -= optind;
107	argv += optind;
108
109	if (argc)
110		usage();
111
112	/* use current time */
113	if (f_time <= 0)
114	    (void)time(&f_time);
115
116	settime(f_time);
117
118	if (doall)
119		while ((pw = getpwent()) != NULL) {
120			(void)setegid(pw->pw_gid);
121			(void)initgroups(pw->pw_name, pw->pw_gid);
122			(void)seteuid(pw->pw_uid);
123			if (!chdir(pw->pw_dir))
124				cal();
125			(void)seteuid(0);
126		}
127	else
128		cal();
129	exit(0);
130}
131
132
133void
134usage()
135{
136	(void)fprintf(stderr,
137		      "usage: calendar [-a] [-A days] [-B days] [-f calendarfile] [-t dd[.mm[.year]]]\n");
138	exit(1);
139}
140
141
142